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Commercial Kitchen Hoods
Installation; Operation; - and - Maintenance Manual
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RECEIVING AND INSPECTION
Upon receiving unit, check for any interior and exterior damage, and if found, report it
immediately to the carrier. Also check that all accessory items are accounted for and are
damage free.
WARNING!!
Installation of this unit should only be performed by a qualified professional who has read and
understands these instructions and is familiar with proper safety precautions. Read this
manual thoroughly before installing or servicing this equipment.
Save these instructions. This document is the property of the owner of this equipment and is
required for future maintenance. Leave this document with the owner when installation or
service is complete.
A0011051
December 2011 Rev 7
TABLE OF CONTENTS
WARRANTY 3
LISTINGS 4
INSTALLATION 4
Site Preparation 4
Clearance Reduction Methods 5
Installation of a Single Hood 6
Basic Hanging Angle 8
Full Length Hanging Angle 8
Corner Hanging Angle 9
PSP Hanging Angle 9
Side View of Typical Hood - 10
End -to -End Hoods 10
Hanging Detail for Multiple Hood Models Hung End -to -End (Hemmed Ends) 11
Hanging Detail for Multiple Hood Models Hung End -to -End (Flanged Ends) 11
Hood Connection Detail for Multiple Hood Models (Hemmed Ends with Trim Strip) 12
Hood Connection Detail for Multiple Hood Models (Flanged Ends w /out Trim Strip) 12
Back -to -Back Hoods 13
Hanging Detail for Hoods Hung Back -to -Back 13
Guidelines for Ductwork Installation 14
Installation of Hood Accessories 15
Back Return Installation 15
Bolt- Together Standoff Installation 17
Back and Side PSP (Perforated Supply Plenum) Installation 18
AC -PSP Installation 19
Wrapper (Enclosure Panel) Installation 21
End -panel Installation 25
Quarter End panel Installation 26
Insulated End panel Installation 27
Backsplash Installation 28
OPERATION 30
Performance Evaluation 30
Guidelines before Beginning 30
External Factors which may affect Hood Performance 31
Using a Shortridge Instrument 31
Calculating Make -up Air CFM with a Shortridge Instrument and Spreadsheet 32
Calculating Make -up Air CFM without a Shortridge Instrument 32
Calculating Exhaust Air CFM with a Shortridge Instrument and Spreadsheet 32
Calculating Exhaust CFM without a Shortridge Instrument 32
Adjustments 33
Conclusion 33
Complete Equipment List for Performance Evaluations 33
Troubleshooting 34
Troubleshooting Chart 34
MAINTENANCE 35
General Maintenance 35
Daily Maintenance 35
Quarterly Maintenance 35 •
Start-Up and Maintenance Documentation 36
Job Information 36
Hood Information 36
Maintenance Record 36
Factory Service Department 36
2
WARRANTY
This warranted free from - defects in materials workmanship , normal use and
service, for a period of 12 months from date of shipment. This warranty shall not apply if:
1. The equipment is not installed by a qualified installer per the MANUFACTURER'S installation
instructions shipped with the product,
2. The equipment is not installed in accordance with federal, state and local codes and regulations,
3. The equipment is misused or neglected,
4. The equipment is not operated within its published capacity,
5. The invoice is not paid within the terms of the sales agreement.
The MANUFACTURER shall not be liable for incidental and consequential losses and damages
potentially attributable to malfunctioning equipment. Should any part of the equipment prove to be
defective in material or workmanship within the 12 -month warranty period, upon examination by the
MANUFACTURER, such part will be repaired or replaced by MANUFACTURER at no charge. The
BUYER shall pay all labor costs incurred in connection with such repair or replacement. Equipment shall
not be returned without MANUFACTURER'S prior authorization and all returned equipment shall be
shipped by the BUYER, freight prepaid to a destination determined by the MANUFACTURER.
3
LISTINGS
This hood is .ETL- listed to standard UL710 when installed in accordance with these installation
instructions and National Fire Protection Association Standard "NFPA 96, Standard for Ventilation Control
and Fire Protection of Commercial Cooking Operations."
INSTALLATION
It is imperative that this unit is installed and operated with the designed airflow, filters and construction in
accordance with this manual. If there are any questions about any items, please call the service
department at 1- 866 - 784 -6900 for warranty and technical support issues.
WARNING: IMPROPER INSTALLATION, ADJUSTMENT, ALTERATION, SERVICE
OR MAINTAINANCE CAN CAUSE PROPERTY DAMAGE, INJURY OR DEATH.
READ THE INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
THOROUGHLY BEFORE INSTALLING OR SERVICING THIS EQUIPMENT.
Site Preparation
1. Provide clearance around installation site to safely rig and lift equipment into its final position.
Consider general service and installation space when locating unit.
2. Locate unit close to the space it will serve to reduce long, twisted duct runs.
3. Thoroughly review the plans and specifications of the project.
4. Determine the exact location in which the cooking hood will be installed and verify that there are
no interferences which will prevent proper installation.
5. Verify that all overhead beams and angles are structurally strong enough to support the weight of
the hood and hanging system. It is often necessary to strengthen existing structural beams, as
they are not designed to carry the weight of a stainless steel hood. Refer to the project submittal
drawing for hood weight(s). It may also be necessary to create a support structure suspended
from the ceiling joists to better align with the desired hood location.
6. Determine if adequate room is available to install the hood and all ductwork with proper
clearances from combustible material. IMC, NFPA96 and local authorities having jurisdiction call
for a minimum clearance (typically 18 inches for type 1, grease rated hoods) between the cooking
hood(s), exhaust ducts, and building materials which are combustible. However, IMC and
NFPA96 outline acceptable clearance reduction methods; most authorities accept the
clearance reduction methods approved in the manufacturer's ETL listing for Type 1,
grease rated hoods. See Figure 1. It is important to check with the local authority having
jurisdiction to determine that the installation method is satisfactory to meet their requirements
prior to installing the equipment.
FOLLOW SMACNA GUIDES AND RECOMMENDATIONS FOR THE HANGING AND
INSTALLATION OF HOODS.
4
Clearance Reduction Methods
Top Clearance Reduction Options
— I' laver of insu foot. y I f 3' -iris :o teed o 'ayPr -r• forte v
a o , 00d
t 1 l in+ c:le. o+ top o= hoed
eptrnali 'optimal)
r
Meets 0 inch reriurener, is err Meets l4fP496 r0gwrenonts or
TvI7iCOl clearance to combustible sur=oces Typical clearance to Unites corbustltle
Section View as outlined being SeC Lion View Surfaces
cF u Listed of a Listed
Type I Hood Type I Hood
End Clearance Reduction Options
un-insuloted airspace :cc :cry
icyer of insoloticn fc_tury—. n•stalled Or end of hood
in:t:lled on end of hood T ypi_al ^ I (optional;
(optlnnoi View cf a Listed 'Pots reglur Pnon;s f
w ar
wee;. 0 aril requirement, Type I Hood clearance to hinteJ corIe.,.tddo
for clearance to combustible s daces
cur aces as nutlinod hole.
•
Back & Front Clearance Reduction Options
0i .
3' tint n Sulated bacl• standoff Fc_tory
d
installeMeets M-PL95 relimrenents for , f _ ' IayPr n sdr. tear for Cory
rlPLrnrcP to limited renhn5 tihle Surfac eS SSS 's tav: ill v f or, o Cr hood
Cat: inch r rcg�� C
an Met 0 ;
s c of ae;iC foe :cry installed I
In 3' standoff meets 0 irch requrenen ;s -
e, ce clearan to corf:ustibe surioces
os outlined hPI O• f ' u rf n acc: a -
outlined bolo.
/ I 3
• Any insulated surface on the hocd can be .in contact with o combustible wall or structure.
• Hood surfaces perpendicular to combustible walls or structures do not need to be insuloted to
raintain the zero inch clearance rctinc. •
• Only the surface of the hocd against a Combustible wall or Structure must be insulated.
• For example, on c combustible back wall, only the back of the flood needs to be insulated, even if'
the beck wall extends beyond the back of the hood an any direction.
Clearance Reduction Methods:
Clearance reduction methods have been evaluated and tested and are certified by ETL The method of test was derived from UL 710 with
• temperatuie cutena taken from appropriate standards.
The hard may he installed with a O inch clearance to combustible matenals per ETL if constructed in one of the following methods
• I inch thick mm layer of insulation of type Owens Coming Type 475 of Johns Manville Type 475 or listed kitchen exhast dun insulation
• I inch thick mm insulated backsplash Insulation of type listed above
• Back Return (BR) supply plenum with I inch thick min insulation of type hated above
To comply with the ETL cemftcaoon, the cooking appliance must be located
• At least 6 inches from the rear wall
• At least 24 inches below the bottom edge of the hood
• Cooking surface must not exceed temperatures abot a 700 °F
The hood may be installed with a 3 inch clearance to limited combustible matenals per NFI °A96 if constructed in one of the following methods
• 3 inch factory installed rem un insulated standoff
• 3 inch factory installed top wrapper of enclosure panel system
• 3 inch factory installed end standoff
Figure 1
5
Installation of a Single Hood (Wall or Island)
The following is a step -by -step procedure for installation of the ventilation hood.
•
1. Uncrate.the hood, being very not to dent or scratch the outer surface. NOTE: Report any
damage to the delivering freight carrier and file a claim if appropriate. Refer to the
installation drawing for typical details of the ventilation system prior to hanging the hood. Check
the nameplate on the equipment to make certain it meets the specifications provided by the
architect and/or engineer. If discrepancies exist, notify the manufacturer immediately.
The nameplate will also give information regarding the following:
• Clearance from cooking surface to front lower edge of the hood
• Minimum exhaust air flow : •
• Maximum supply air flow (if applicable)
• Minimum front overhang from cooking surface
• • Minimum side overhang from cooking surface
• Maximum cooking surface temperature
• Replacing fusible links for exhaust and supply damper (if applicable)
• Replacing filters
2. Determine the height at which the hood will be hung:
Canopy hoods are typically hung so that the front lower edge of the hood is within 6'6" - 7'0"
AFF. However, the hood should be hung so that the proper clearance from the cooking surface
to the front lower edge of the hood is maintained. See nameplate for clearance from cooking
surface to front lower edge of hood. Exact hood hanging height should be verified with local
authorities having jurisdiction.
Note: If there are wrappers (enclosure panels) with the order, measure down from the ceiling the
height of the wrappers. That will be the top hanging height of the hood as long as the following
criteria are met:
• The front lower edge of the hood is within 6'6" to 7'0" AFF,
• The front lower edge of the hood is within the clearance requirement from the
cooking surfaces, and
• The top of the hood is at least 3" away from the ceiling.
If the hanging height based on wrappers does not fall in this range, contact your local office.
Backshelf hoods are typically hung at the maximum height allowed from the cooking surfaces.
See nameplate for clearance from cooking surface to front lower edge of hood. Exact hood
hanging should be verified with local authorities having jurisdiction.
Note: If there are wrappers with the order, measure down from the ceiling the height of the
wrappers. That will be the top hanging height of the hood as long as the front lower edge of the
hood is within the clearance requirement from the cooking surfaces. If the hanging height based
on wrappers does not fall in this range, contact your local office.
3. If the hood has a back return, install it now. See the Installation of Hood Accessories section.
4. If the hood has a bolt- together standoff, install it now. See the Installation of Hood Accessories
section.
5. If the hood has duct thermostats, install them now per the thermostat installation drawing.
6. Position hood on the floor in its approximate final position with the supply and exhaust risers on
the hood located directly beneath the corresponding openings in the roof, if possible. It is
6
advisable to finalize the location using a plumb -bob or laser. Protect the hood when it is on the
jacks to avoid_dents, scratches, and other damage to_the.hood.. __. _. .. _
7. Proceed to weld exhaust duct to hood while on the floor, if possible.
8. Use 1/2" threaded rod to hang hoods. Drill 9/16" holes in the structural support system or use
Unistrut® to line up with the welded -on angle mounting brackets on the hood. There are several
types of mounting brackets depending upon the hood type; each, however, has a predrilled hole.
See Figure 2 for detailf. The structural integrity of the structural support system is the
responsibility of the contractor and the structural engineer. There are also center hanging
angles on hoods 12 feet in length and longer. Some backshelf hoods do not have hanging
angles and must be anchored to back wall using the standing flange provided. Structural lagbolts
must be used every 12 inches on center maximum and must be secured to studs behind wall.
9. The spacing on the hole for the modified support should line up with the mounting bracket on top
of the hood. The top hanger should be 1/2" closer to the back wall than the mounting bracket on
the hood to pull the hood against the wall. See Figure 3. Some hoods are designed for island
installations where a wall is not present.
10. With the hood well protected against possible scratching, raise the hood into position using high
lifts or equipment jacks at each end to keep the hood level. When the hood is elevated to the
proper height, install 1/2" threaded rod between each mounting bracket on the hood and the
modified support. Secure rods with heavy duty nuts and appropriately sized fender washers
above and below the hanging angle.
11. Make final adjustments as needed to ensure the hood is hung level. Maintain tension on all rods
to ensure the hood weight is evenly distributed. If it is necessary to stand or work on top of the
hood, use pieces of plywood to evenly distribute weight on the hood so no damage occurs.
12. Brace hood to ceiling joists and wall(s), as applicable, so that the hood does not move. Secure
hood to wall in a manner acceptable to the authority having jurisdiction.
13. If the hood has Back and /or Side Perforated Supply Plenums (i.e. PSPs), install them now. See
the Installation of Hood Accessories section.
14. If an AC -PSP is to be installed with the hood, install it now. See the Installation of Hood
Accessories section.
15. Install the exhaust ductwork. The entire exhaust duct system must be continuously welded, liquid
tight unless it is Listed Factory Built Grease Duct. The duct must be welded to the hood exhaust
collar and the roof curb cap must be welded to the exhaust duct. See Guidelines for Ductwork
Installation - By Others.
16. Install the supply ductwork. See Guidelines for Ductwork Installation — By Others.
17. If the hood is equipped with a control unit, an installation wiring diagram will be provided inside of
the control unit. The jobsite electrician is responsible for making the appropriate field
connections. This includes all lights and duct/hood mounted thermostats.
18. If the hood is equipped with a factory prepiped fire suppression system, a certified fire system
installer is responsible for completing the field hookup, testing, and certifying the system in
accordance with the manufacturer's specifications and the local fire codes. If the hood is not
prepiped, a certified fire system installer is responsible for installing, testing and certifying the
system in accordance with the manufacturer's specifications and the local fire codes.
19. If the hood is equipped with wrappers (enclosure panels), end panels, and /or backsplash panels,
install them now. See the Installation of Hood Accessories section.
20. Caulk the lower edge of the hood where it meets the wall. This does not apply to hoods installed
in island configurations.
21. Install light bulbs, light globes, and grease filters in the hood.
22. Install grease cups in the brackets /slots provided.
23. Use a stainless steel polish to clean the hood of dust or dirt acquired in transit.
24. It is recommended that the protective plastic sheeting remain on the installed hood until
construction is complete, so as to avoid any damage to the equipment.
WARNING: NEVER PUNCTURE THE HOOD GREASE CONTAINMENT AREA TO
HANG HOOD OR TO HANG ITEMS FROM HOOD. PUNCTURING THE GREASE
CONTAINMENT AREA WILL VOID WARRANTY AND LISTING ON HOOD.
7
Basic Hanging Angle
1/2' DIA., ALL THREAD ROD STEEL HANGING ANGLE
CONNECTED TO ROOF JOIST
THROUGH ANOTHER
HANGING ANGLE
u ,
------ t<-
1/2' DIA. HEAVY DUTY NUT
AND WASHER - ONE ABOVE
AND ONE BELOW HANGING ANGLE .
ROD, NUTS, AND WASHERS TO BE SUPPLIED BY INSTALLING CONTRACTOR
HANGING ANGLE IS PRE - PUNCHED AT FACTORY
Figure 2A
Full Length Hanging Angle
STEEL HANGING ANGLE a -
1E. _.-.-
, 0 .
1/2' DIA. ALL THREAD ROD ` /
CONNECTED TO ROOF JOIST
THROUGH ANOTHER
HANGING ANGLE
0'13 .44.0
rill000111::: 1/2' DIA, HEAVY DUTY NUT
AND WASHER - ONE ABOVE
AND ONE BELOW HANGING ANGLE -
ROD, NUTS, AND WASHERS TO BE SUPPLIED BY INSTALLING CONTRACTOR .
HANGING ANGLE IS PRE — PUNCHED AT EACH END AT FACTORY
Figure 2B
8
Corner-Hanging- Angle- -- --
1/2' DIA. ALL THREAD ROD STEEL HANGING ANGLE
CONNECTED TO ROOF JOIST
THROUGH ANOTHER
HANGING ANGLE
1/2' DIA. HEAVY DUTY NUT
AND WASHER - ONE ABOVE
AND ONE BELOW HANGING ANGLE
ROD, NUTS, AND WASHERS TO BE SUPPLIED BY INSTALLING CONTRACTOR
HANGING ANGLE IS PRE - PUNCHED AT FACTORY
Figure 2C
• PSP Hanging Angle
1/2' DIA. ALL THREAD ROD STEEL HANGING ANGLE
CONNECTED TO ROOF JOIST
THROUGH ANOTHER
HANGING ANGLE
•
` 1/2' DIA. HEAVY DUTY NUT
_ AND WASHER - ONE ABOVE
AND ONE BELOW HANGING ANGLE
ROD, NUTS, AND WASHERS TO BE SUPPLIED BY INSTALLING CONTRACTOR
HANGING ANGLE IS PRE - PUNCHED AT FACTORY
Figure 2D
9
Side View of Typical Hood
• 1/2' SHORTER THAN _
Y -1/2' DIMENSION 'X' BELOW
I F i SUPPORT STRUCTURE BY OTHERS
%/ rL q.
/ / I I FACTORY HANGING ANGLE
III III
/
/
/
HOOD
SIDE VIEW OF TYPICAL HOOD
Figure 3
End -to -End Hoods
The following is a step -by -step procedure for installation of end -to -end ventilation hoods. Refer to
Figures 4 and 5.
1. Follow steps 1 through 10 of the Installation of a Single Hood section for each hood.
2. Adjust tension on hanging rods to position hoods so they fit flush with each other as shown in
Figure 4.
3. Bolt the top of the hoods together. See Figure 5.
4. Once all of the hoods are hung, follow steps 11 through 19 of the Installation of a Single Hood
section.
5. NOTE: Hoods having more than a 1/8" gap between them must be repositioned so that'gap
between hoods is <= 1/8 ". Run a bead > =1/8" of silicone sealant along the lower horizontal seam
of the two hoods. Slip the U- channel trim, if applicable, over the seam as shown in Figure 4.
Tape can be used to hold the U- channel in place until the silicone cures. U- channel is not
required on hoods with Flanged ends.
6. Run a bead of the same silicone sealant along the front vertical seam between the two hoods.
Slip the T -strip trim between the hoods if applicable. See Figure 5. T Strip is not required on
hoods with flanged ends and fully welded, ground, and polished corners.
10
7. Proceed with steps 20 through 23 of the Installation of a Single Hood section.
Hanging Detail for Multiple Hood Models Hung End -to -End (Hemmed Ends)
LET UP ON
TENSION I I I I THREADED EAA RO D
SLI
TO BRING MST
HMIS C N ° a1
TOGETHER
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AT BOTTOM
1 1
1/2'
FLATTENED HEM
u
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U- QIANNEL
TRIM
U- CHANNEL TRIM
Figure 4A
Hanging Detail for Multiple Hood Models Hung End -to -End (Flanged Ends)
LET N ON THREADED ROD
SLI N GHTLY �� TO JOISTS BY
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Figure 4B
11
Hood Connection Detail for Multiple Hood Models (Hemmed Ends with Trim Strip)
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Figure 5A
Hood Connection Detail for Multiple Hood Models (Flanged Ends w /out Trim Strip) .
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Figure 5B
12
Back -to -Back Hoods
The following is a step -by -step procedure for installation of back -to -back ventilation hoods. Refer to
Figures 5 and 6.
1. Follow steps 1 through 10 of the Installation of a Single Hood section for each hood.
2. Adjust tension on hanging rods to position hoods so they fit flush with each other as shown in
Figure 6.
3. Bolt the top of the hoods together by sliding a threaded rod through the connection bracket slots
and fastening it into position by using heavy duty nuts and washers. See Figure 5.
4. Once all of the hoods are hung, follow steps 11 through 19 of the Installation of a Single Hood
section.
5. Run a bead > =1/8" of silicone sealant on the lower horizontal seam between the two hoods. Slip
the U- channel over the seam as shown in Figure 6. Tape can be used to hold the U- channel in
place until the silicone cures.
• 6. Run a bead of the same silicone sealant along the side vertical seam between the two hoods.
Slip the T -strip trim between the hoods. See Figure 5. T Strip is not required on hoods with
flanged ends and fully welded, ground, and polished corners.
7. Proceed with steps 20 through 23 of the Installation of a Single Hood section.
Hanging Detail for Hoods Hung Back -to -Back
LET UP ON THREADED ROD
I I SLIGHTL I �� TO JOISTS BY
TO BRING CONTRACTOR
TOGETHER S MOLE 1=1-112
AT BOTTOM F MEI
• FLATTENED HEM
MiiP S/S
D / U- C HA NNEL
TRIM
U- CHANNEL TRIM
HANGING DETAIL FOR HOODS HUNG BACK -TO -BACK
Figure 6
13
Guidelines for Ductwork Installation
Ductwork is furnished by supplier only if specified by the customer. The following information is provided
as a guideline only. Ductwork should be installed in accordance with the local codes and restrictions. It
is the responsibility of the installer to check local codes prior to installing the ductwork.
1. All ductwork must be installed in the most direct manner possible.
2. Exhaust duct must be made of 16 gauge carbon steel, 18 gauge stainless steel or must be listed
for use with commercial kitchen hoods and follow the manufacturer's listing.
3. Per NFPA 96, all exhaust duct seams and joints must have a continuous liquid tight external
weld; exception would be Listed Factory Built Grease Duct.
4. Exhaust risers on the hood have been sized to achieve a velocity of 500 -2200 FPM, per NFPA
96, based upon the CFM' required for the hood. Maintain the area of each riser when connecting
duct offsets or transitions.
5.. Branches should enter at gradual expansions and at a preferred angle of 30 degrees or 45
degrees if necessary: •
6. When a "pantleg duct" is required to bring two ducts into one exhaust fan, observe the following in
order to obtain desired performance:
a. Use ONLY radius back and radius throat elbows. 2 to 2.5 diameter center line radius is
recommended.
b. Maintain the distance between the center lines of exhaust ducts at a maximum of 12'
apart.
c. The main duct going to the exhaust fan must be the sum of the area of the separate legs.
7. Supply air risers are sized around a maximum of 600 FPM. Maintain this area when installing
ducts.
8. Do not use "flexible" type duct for supply duct. Only rigid.type duct installed in accordance with
SMACNA Low Pressure requirements will be acceptable.
9. Access Doors should be provided at the sides or at the top of the duct, as well as changes of
direction. Please refer to your AHJ if questions on requirements for horizontal and vertical duct
run.
10. IMPORTANT: When a fusible link is installed in the make -up air damper at the hood collar, an
access door must be cut into the supply duct by the installer.
11. Duct sensor may ship loose on hoods with field cut risers. When double wall duct or ductwork
with a diameter smaller than 10" is used, loose duct sensors should be installed in the top of the
plenum near the riser in the path of the exhaust airflow.
14
Installation -of -Hood Accessories- - -- - - -- - - -- - - - - --
Back Return Installation
1. Locate the assembly and unpack the product from the crate, being very careful not to dent or
scratch the outer surface. NOTE: Report any damage to the delivering freight carrier and file
a claim if appropriate.
2. If the supply risers are to be field cut, cut the risers in as desired. NOTE: For factory cut
supply risers, the manufacturer installs a 2" vertical flange around the opening. This flange
is intended to slip inside a supply boot that is provided by the installer.
3. Locate the wall and ceiling joists which will support the assembly.
4. Use 1/2" threaded rod to hang the back return. Install the threaded rod and angle or Unistrut®
that will be used to hang the assembly from the ceiling joists. Drill 9/16" holes as needed in the
angle for the threaded rod. Be sure to line up with the welded -on angle mounting brackets on the
back return.
5. The back return is typically hung so its top edge is the same height as the top edge of the hood.
See Figure 7. Refer to Step 2 in the Installation of a Single Hood instructions to determine the
hood and back return hanging heights.
6. Slowly raise the back return until hanging rods can be attached to the hanging angles. It is
advisable to do this before the back return reaches its final height. NOTE: Please use caution
as weight is not proportionally dispersed. Install the threaded rod into the back return
hanging angles and use heavy duty nuts to secure the connection.
7. Make sure the back return is level. Secure to wall in a manner acceptable to the AHJ.
8. If there are multiple back return sections, install the remaining sections now. Use caulk and the
T -strip trim between adjacent back return sections. See Figure 8.
9. Peel the protective plastic coating on the back return down below where the bottom edge of the
hood will rest against it, so it does not remain behind the hood.
10. Caulk the seams between the wall and the back return assembly after the hood and all other
accessories have been installed.
15
Is
Section View of Typical Hood with Back Return
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• STHYTWSL wain
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SECTNIH VIEW nr TYPICAL NOM
WITH BACK Rr1LISI
Figure 7
Back Return — Multiple Sections
TMEACED PCP
BY mERS
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CELL. D
STAINLESS STEEL PANEL
- TACK WELDS
/FINISHED RODI
vALI
• ` ``! � ` SUPS I a
P ANO,i T -STRIP I IPIN
11 BAS{ RETURN - MULTIPLE SECt1OI15
Figure 8
16
• Bolt- Together Standoff Installation
1. Unpack the standoff panels from the shipping container, being very careful not to dent or scratch
the panels. NOTE: Report any damage to the delivering freight carrier and file a claim if
appropriate.
2. Mount the end caps for the back standoff to the hood securely with self- tapping sheet metal
screws. Clamp the back standoff and the hood together before screwing so they do not shift. See
Figure 9.
3. Place the back standoff filler piece into place flush with the rear bottom edge of the hood and
secure with self- tapping sheet metal screws.
4. Continue with hood installation instructions.
5. After the hood installation is complete, secure the bolt- together standoff to the wall or other hoods
as applicable in a manner acceptable to the authority having jurisdiction.
Bolt Together Standoff Installation
•
•
•
Mount the end caps for the back standoff to
the hood using self - tapping sheet metal
• screws provided. Screw through the end cap
flanges into the flanges on the hood
• u•
�� __� ''�' Place the hack standoff horizontal filler
piece into place. Mount the filler piece
�
• using self- tapping sheet metal screws
provided Screw through the filler piece
flanges into the studs on the back side of the
hood. Do not penetrate into the capture
area. Once complete, no screws should be
visible from the outside of the hood.
Attach the back standoffs to the wall using
0,41111%iir-screws appropnate for the wall. Screw ff through the flanges of the stando into the
fro. wall. If standoff mounts against another
hood, use the procedure from steps I and 2
for the second hood.
Figure 9
17
•
Back and Side PSP (Perforated Supply Plenum) Installation
1. Locate assembly and unpack it from the crate, being very careful not to dent or scratch the
outer surface. NOTE: Report.any damage to the delivering freight carrier and file a claim if
appropriate. .
2.- Upon completion of the hood install, install the back PSP first. Then if applicable, install the side
PSPs.
3. If the supply risers are to be field cut, cut the risers in as desired.
4. • Locate the ceiling joists which will support the assembly: If using Unistrut®, then securely attach
to the ceiling joist. .
5. Use 1/2" threaded rod to hang the PSP. Install the threaded rod and angle that will be used to
• hang the assembly from the ceiling joists. Drill 9/16" holes in the angle if'not using Unistrut®. Be
sure to line up with the angle mounting brackets on the PSP.
6. - Peel the protective plastic coating on the hood down below where the bottom edge of the PSP
will rest against the hood, so it does not remain behind the PSP. _
7. Move the PSP into position as indicated by the project submittal drawings; lining up the top edge
of the PSP with the top edge of the hood. Remove the protective coating from the back of the
PSP. See Figure 10.
8. Install the threaded rod into the PSP hanging angles and use heavy duty nuts to secure the
connection. Adjust tension on hanging rods to position PSP so it fits flush with the hood. NOTE:
Do not apply too much tension; otherwise, a gap between the PSP and Hood will be
created at the bottom.
9. Install additional PSPs, if applicable, in the same manner.
10. Where applicable, use sheet metal screws to secure the PSP attaching bracket on top of side
PSPs to front PSP. See Figure 11.
11. Caulk the seams between the hood(s) and each PSP as as well as between adjacent .
PSP assemblies (if applicable) after the hood(s) and hood accessories have been installed. An
isometric view of the hood assembly for a model PSPFBSS is shown in Figure 12.
PSP Installation on Model PSPFSS
.a t� P19 MIPS =I FM
f
BRAERIT
1 _ 11 '. - 10
SIDE PSP '�Oil FREW PIP
camps LOSE MR
Figure 10
18
Attachment of Side PSP
•¢ PSP
MC PSP
.mss �II •I 'i
OL SIDE SP . TT.00f• R C t m� PSPS .I1 IL SE SM TI r1EL0.
7T110m 70 P S7 X Pto p fKi®Y USE SI[Er IE TIL SOaEVS E D
IRpG S1QEI IE'111L SORVS . TO SRS$ CIIIPQTUN &TVIDI MPS.
IlD1T PSP
• PSP
Figure 11
PSP with a FBSS Configuration
Figure 12
AC -PSP Installation
1. Locate the assembly and unpack it from the crate, being very careful not to dent or scratch the
outer surface. NOTE: Report any damage to the delivering freight carrier and file a claim if
appropriate.
2. If the supply risers are to be field cut, cut the risers in as desired.
3. Locate the ceiling joists which will support the assembly. If using Unistrut®, then securely attach
to the ceiling joist.
19
4. Use 1/2" threaded rod to hang the AC -PSP. Install the threaded rod and angle that will be used -
to hang the assembly from the ceiling joists. Drill 9/16" holes as needed in the angle for the
threaded rod. Be sure to line up with the welded -on angle mounting brackets on the AC -PSP.
5. Peel the protective plastic coating on the hood down below where the bottom edge of the AC-
PSP will rest ..against the hood so it does not remain behind the AC -PSP. •
6. Move the AC -PSP into position as indicated by the project submittal drawings; lining up the top
edge of the AC -PSP with the top edge of the hood. Remove the protective plastic coating from
the back of the AC -PSP. See Figure 13a and 13b.
7. Install the threaded rod into the AC -PSP hanging angles and use heavy -duty nuts to secure the
connection. Adjust tension on hanging rods to position AC -PSP so it fits flush with the hood.
8. Caulk the seams between the hood(s) and the AC -PSP assembly,:as well as between adjacent
AC -PSP assemblies (if applicable) after the hood(s) and hood accessories have been installed.
AC -PSP Installation I
l 1/C T RADE➢ RID
Bt DRKFS
-R9 nEEESSOR■
Figure 13A
AC -PSP Installation
V2' 2 DTH( R®
B1 OT
N...
�\
00•00-.0r40-P"411-11.-1111 ti;
1%,
c -RSP ACCESSORY
i
Figure 13B .
20
_ Wrapper (Enclosure Panel) Installation -
1. Unpack the wrapper panels from the shipping container, being very careful not to dent or scratch
the panels. NOTE: Report any damage to the delivering freight carrier and file a claim if
appropriate.
2. Locate one of the side wrapper panels and position it on the hood so that the 1/2" flange on the
bottom of the panel slips underneath the side channel on top of the hood. See Figure 14A:
Wrapper Detail. NOTE: A notch will have to be cut on the wrapper flange using shears (tin
snips) where interference occurs, where applicable. See Figure 14B: Top Hood Seam Detail.
3. Press fit panel into place until wrapper face is flush with hood face. Screw or pop -rivet wrapper to
the side channel and wall. See Figure 14C: Wrapper Detail and Rear Wall Attachment.
4. Locate front wrapper panel. Position its lower 1/2" flange under front channel on hood and slide
panel into position, so that the end of front panel is behind the 90 degree bend of the side panel.
See Figure 14D: Front Corner Assembly. Once in place, press fit the lower flange of the front
panel into the front channel in order to have wrapper face flush with the front of the hood. Screw
or pop -rivet bottom of front panel to the front channel.
5. Drill appropriate holes and rivet front to side wrapper panel. See Figure 14D: Front Corner
Assembly.
6. If multiple panels are used, a stainless trim piece will be provided to attach multiple panels
together (i.e. hood is side to side, hood is back to back to another, or the wrapper length exceeds
16 feet). Attach the panels by slipping them behind the stainless trim and fastening with screws
or rivets. See Figure 15. NOTE: Trim will have to be cut to fit. In most instances, trim should
extend from bottom of hood to top of wrapper panel.
7. Locate the other side panel. Repeat steps 2 and 3. Attach to front wrapper panel as instructed in
step 4. NOTE: In most instances where hood is located against a side wall, fasten the front
wrapper panel to the wall. See Figure 14E: Side Wall Attachment.
8. Caulk all gaps and seams after the hood(s) and hood accessories have been installed.
Wrapper Detail
\'RAPPER FACTORY MOUNTED
CHANNEL
SCREW OR --
POP -RIVET .o-
• POSITION BOO IOM
TOP OF HOOD 1/2' FLANGE
_
OF WRAPPER UNDER
CHANNEL
SIDE OF HOOD
Figure 14A
21
Top Hood Seam Detail (Not on all models)
FACTORY C- CHAN■EL
rt'
NOTCH REQUIRED
WHERE SCAM MEE1 S WRAPPER
TOP SEAM ON HOOD
Figure 14B
Rear Wall Attachment
E 'ALL
II
FASTEN LL SIDE WRAPPER
INSIDE OF SIDE PANEL
Figure 14C
22
Front Corner Assembly
PLACE FRONT PANEL
UNDER 90 DEGREE BEND
OF SIDE PANEL AND SCREW OR
POP -RIVET INTO POSITION
'41111111111111111111111
STAINLESS
\\- ✓ POP - RIVETS
BY OTHERS
SIDE WRAPPER PANEL
FIELD DRILLED
HOLES FOR
POP- RIVETS
FRONT
WRAPPER
PANEL
Figure 14D
Side Wall Attachment
FIELD SUPPLIED
ANGLE
INSIDE OF FRONT PANEL
n
I I
FASTEN FRONT WRAPPER
TO WALL
Figure 14E
23
Completed Wrapper Assembly
INSTALLER TO
FASTEN WRAPPER
T O FACTORY WRAPPER PANELS
C HANNEL FLANGED FOR
-.� RIGIDITY
I
WALL \
I � WRAPPER END
IL.'
WRAPPER
1
FRONT
CANOPY HOOD
PRESS FIT UNTIL
PANEL FACES ARE FLUSH
WITH HOOD AND POP RIVET
OR SCREW PANELS TO CHANNEL
Completed Wrapper Assembly on End -to -End Hoods
INSTALLER TO
FASTEN WRAPPER
T❑ FACTORY WRAPPER PANELS
CHANNEL FLANGED F❑R
14 1 RIGIDITY
1`
WALL
I -•---- WRAPPER END
.'""'' '''\ ........,....,..,s.... .., d iIIIIIIIIIIPI IIIIIII' lll
WRAPPER
1
FRONT
CANOPY HOOD
PRESS FIT UNTIL
PANEL FACES ARE FLUSH
WITH HOOD AND POP RIVET
OR SCREW PANELS TO CHANNEL
Figure 15
24
• End -panel Installation
1. Unpack the end - panel(s) from the shipping container, being very careful not to dent or scratch the
panels. NOTE: Report any damage to the delivering freight carrier and file a claim if
appropriate.
2. Refer to the project submittal drawings to determine mounting location.
3. Position the end panel with the kinked top located flush against the inside of the hood end and
the rear flange located flush against the rear wall and facing toward the interior of the hood. Refer
to Figure 16.
4. Attach the top edge of the end -panel to the end of the hood using the acorn nuts provided.
5. Secure the rear flange to the wall using stainless steel sheet metal screws, being sure to keep the
end panel straight vertically.
6. Caulk all seams between the end -panel and the hood after the hood(s) and hood accessories
have been installed.
• End panel Installation (Hoods with Hems on Ends)
//- H ®D
CAULK DEAD
CORN '`v -.` 1
441,4, N10 STUB ` HEN
ROAR FLANGE KINK
ENOPANEL
1/4' THRU HOLES
(TYPICAL Er 4)
NDPANEL
Figure 16A
End panel Installation (Hoods with Flanges on Ends)
/HGDD
C CAULK
` "`` REAR FLAME/ EMPANEL ,
1/4' THRU VOLES
(TYPICAL OF 4)
IPANEL
Figure 16B
25
Quarter End panel Installation •
1. Refer to Figure 17.
2. Follow steps 1 through 6 of the end panel Installation instructions.
Quarter End panel Installation (Hoods with Hems on Ends)
._ 0
HOOD
HEN
CAULK IIEAI
REAR FLANGE
11111
1/4' THRU Haul
(TYPICAL OF 4) ND S �lU
KINK
ENDPANET_
Figure 17A
Quarter End panel Installation (Hoods with Flanges on Ends)
a,
pill r HOOD
P
CAULK
REAR FLANGE N
1 / (TYPICAL OF E4) A&N §N SNll1
II
ENDPANEL
Figure 17B
26
- Insulated End panel Installation
1. Refer to Figure 18.
2. Follow steps 1 through 6 of the end -panel Installation instructions.
Insulated End panel Installation (Hoods with Hems on Ends)
�% i r
,' CAULK BEAD J ` HOOD f/ N�1/ i`
a ARIP `HEN
\ . `` ,4 / KINK ENDPANEL
SULATION
I REAR FLANGE
1 1/4' THRU HOLES
;/ (TYPICAL OF 4)
,1
dr
1 NDPANEL
II
Figure 18A
Insulated End panel Installation (Hoods with Flanges on Ends)
iiiiil°:
....-- //- HMO
a CpR CAULK
_ AANII S70
• t _ �` _.. EMPANEL
/ REAR FLANGE r
NSULATION
1 I 1/4' THRU HOLES
(TYPICAL OF 4)
1
/ NDPANEL
Figure 19B
27
Backsplash Installation
1. Unpack the backsplash panels from the shipping container, being very careful not to dent or
scratch the outer surface. NOTE: Report any damage to the delivering freight carrier and file
a claim if appropriate.
2. Refer to the project submittal drawings to determine mounting orientation (vertical or horizontal)
and mounting location. If panels intended for the same wall are of different widths, position them
in a symmetrical arrangement.
3. Determine whether or not cutouts are required to accommodate electrical outlets, pipes, etc. and
make appropriate cutouts being careful not to crease the backsplash panels.
4. Secure panels and trim pieces to the wall using construction adhesive. See Figure 19.
Standard Backsplash
rr jr/
; /
//// r
r /r /r / / / 2/ .
rte // //
r //
WALL /. / //r
///
\ / //' DI .
/ / /
r /r r
/r BACKSPLASH PANELS
/ / // SLIDE INTO END CAP
0
/0 / STRIPS
// fir/ 1////// // .
i it
/
/
i
/
/
/
/j BACKSPLASH PANELS
/ SLIDE INTO
r. DIVIDER BAR
/
/
/
7.
//
j .
7
Figure 19
28
•
Insulated Backsplash Installation
1. Follow steps 1 through 3 of the Backsplash Installation instructions.
2. Slide the top flange behind the lower rear edge of the hood. Secure the bottom flange to the wall
using stainless steel sheet metal screws. See Figure 20.
3. If there are multiple insulated backsplash sections, install the others now.
4. Caulk the seams between the wall and the insulated backsplash panel after the hood(s) and hood
accessories have been installed.
Insulated Backsplash
INSULATED BACKSPLASH )10,
/ 97/7" i
CAULK
BETWEEN
PANELS
SLIDE TOP FLANGE BEHIND
10 .
LOWER REAR EDGE OF HOOD
9
FLANGES LOCATED
AT TOP AND BOTTOM STAINLESS STEEL BACKSPLASH
INSULATED WITH 1' THICK
4/ DUCTBOARD WITH FOIL BACKING
' Figure 20
29
OPERATION
Commercial kitchen ventilation hoods are intended to be used in conjunction with ductwork and fans,
which have been properly sized and properly installed in accordance with manufacturer's specifications
and local code requirements.
Before turning on cooking equipment, make sure that the make -up air and exhaust fans are on. Leave
fans on for at least 30 minutes after cooking equipment is shut off. -
Clean hood as needed to comply with local code requirements and as directed in the Maintenance
section of this manual.
•
Performance Evaluation
A performance evaluation of the system can be performed only after all of the following items have been
verified:
1. All fans are operational and rotations visually verified by observation of the arrows stamped on
them.
2. All filters are in place.
3. Equipment under the hood is in place and operational.
4. HVAC units are in place and operational with blowers operating correctly.
Guidelines before Beginning
The testing and balancing of a system is necessary to ensure proper and efficient operation of the system
as it was designed. In any building where effluent and hot air is removed, the mass of air must be
replaced to maintain a constant pressure in the space. Any change in the pressure differential between
inside and outside air will in some way affect the operation of a system; most commonly that affect is a
negative one.
A test and balance, as well as the simple performance test in International Mechanical Code Section
507.16.1 should be included in all jobs; code inspectors are increasingly enforcing these requirements.
Requirements in the 2006 IMC, which is currently effective in most parts of the United States, are as
follows:
"507.16 Performance test. A performance test shall be conducted upon completion and before
final approval of the installation of a ventilation system serving commercial cooking appliances.
The test shall verify the rate of exhaust airflow required by Section 507.13, makeup airflow
required by Section 508, and proper operation as specified in this chapter. The permit holder shall
furnish the necessary test equipment and devices required to perform the tests.
507.16.1 Capture and containment test. The permit holder shall verify capture and containment
performance of the exhaust system. This field test shall be conducted with, all appliances under
the hood at operating temperatures, with all sources of outdoor air providing makeup air for the
hood operating and with all sources of recirculated air providing conditioning for the space in
which the hood is operating. Capture and containment shall be verified visually by observing
smoke or steam produced by actual or simulated cooking, such as with smoke candles, smoke
puffers, etc."
The simplest means of doing the performance test is using a T -T puffer from www.evhill.com. Activate the
puffer and use it to trace effluent around the entire perimeter of the hood, emitting smoke every few
inches under the lower edges of the hood.
30
External Factors which may affect Hood Performance
- 1. HVAC - units are generally specified supply 25% (OA) to the room ventilation. If -
RTU's are not supplying the proper amount of OA to the building, then negative pressure will
exist.
2. HVAC return grilles located close to a hood can cause performance problems. The return grille
competes with the hood to capture air in the room. For example, a return grille for a 10 -ton HVAC
unit can draw anywhere from 3000 to 4000 CFM. This is equivalent to the exhaust of a 10' to 13'
canopy hood. As a result, a return air grille located within six feet (6') of the hood can have a
serious effect on the capture ability of the hood.
3. HVAC diffusers located near a hood can create flows in the room that detract from the capture
ability of the hood. If the HVAC diffuser bounces air off the front of the hood or directs air along
the hood and past the end, the air flow created can draw smoke and contaminants out of the
hood.
Using a Shortridge Instrument
The Shortridge is a sophisticated instrument that, with its built -in features, is basically a self contained test
and balance kit. It has a "velocity grid" for filter face readings, a "velocity probe" for ductwork readings, a
"differential pressure" function to check room pressure and static pressure, as well as a "temperature
probe" so it can calculate accurate values based on varying temperature (most equipment assumes
standard temperature and pressure), and many other useful features.
Hood Information
To calculate the CFM, the following information must first be acquired:
1. Hood size and length
2. Filter size and length
3. PSP width and length
Measuring Hood Static and Room Pressure
Static Pressure:
1. Measure hood static pressure at exhaust collar using the Shortridge instrument.
Static Pressure =
Room Pressure:
For an exhaust hood to work properly, the kitchen should be at a slight negative pressure to the dining
area (caused by its air removal) and the building overall slightly positive. The dining room should be a
slight positive to the outdoors and the kitchen +0.02" w.c. or about 300 CFM positive. This will keep dust
and bugs outside and doors will be easy to open. The kitchen should be a slight negative to the dining
room to keep the odors in the kitchen. The kitchen should be balanced to slightly negative, 0" to - 0.02"
w.c., to the dining room. Generally, if there is not enough negative, or if there is positive pressure there
will be smoke roll out from the hood that occurs due to the wind currents from people moving around in
the area, while if there is too much negative, there becomes a pressure problem on the building(opening
doors, drafts, hot water heaters, etc.)
1. Measure room static pressure using the Shortridge instrument. Adjust the supply fan to set room
to 0.02" negative to dining area.
Room Pressure =
31
Calculating Make -up Air CFM with a Shortridge Instrument and Spreadsheet
1. Use the Velgrid mode of the Shortridge instrument to measure supply air velocity. Make sure to
take measurements every twelve (12) inches along the length of the PSP.
2. Locate the appropriate Excel spreadsheet for the PSP /Supply velocity and record all necessary
data. This spreadsheet will calculate the total supply CFM for the hood.
3. The spreadsheet is located on the manufacturer's website.
Calculating Make -up Air CFM without a Shortridge Instrument
1. Compute the open area of The supply plenum of the hood. This area must be calculated at the
same plane that velocity readings are taken. Area can be calculated using the following formula:
Area (ft = Length (ft) x Width (ft)
If both the length and width are measured in inches, use the following formula:
Area (ft = Length (in) x Width (in) / 144
2. Record velocity of air through supply openings from left to right on raw data sheet.
3. Compute and record average velocity through supply openings.
4. Compute and record CFM through supply openings.
CFM = Free area x Average Velocity
5. Compute total CFM through all supply openings for each hood.
Calculating Exhaust Air CFM with a Shortridge Instrument and Spreadsheet
1. Use the Velgrid mode of the Shortridge instrument to measure the velocity at each filter.
2. Locate the appropriate Excel spreadsheet for the exhaust velocity and record all necessary data.
This spreadsheet will calculate the total exhaust CFM for the hood.
Calculating Exhaust CFM without a Shortridge Instrument
1. Record filter sizes of each hood on raw data sheet.
2. Compute free area of the filters. '
Examples:
16 "x16" = 14x14 = 1.36 ft
10 "x20" = 8x18 = 1.00 ft
12 "x16" = 10x14 = 0.97 ft
3. Record velocity of exhaust gases through filters starting top left to right (5 reading /filter).
4. Find average velocity through each filter.
5. Compute CFM through each filter.
CFM = Free area x Average Velocity
6. Total the exhaust CFM for each hood.
7. Multiply total exhaust CFM x 0.78 (this is the K factor necessary when using the EDRA
velometer).
32
•
_ Adjustments
1. A hood with multiple risers should be balanced according to the cooking load beneath it. For
example, if a hood with multiple risers has a charbroiler in the center and several ovens on the
ends, the risers should be evenly balanced. This will achieve the most efficient contaminant
capture.
2. Perforated supply plenums discharging air around the hood should be set to the designed
discharge velocity.
3. When fan pulleys are adjusted, belts should then be re- checked for correct tension and an
amperage reading should be taken on the motor to make certain it is not overloaded.
4. The prime objective of balancing is to ensure that each hood will capture all the contaminants
produced by the equipment it covers without causing undesirable conditions in the kitchen (i.e.
excessive negative pressure, excessive quantities of hot or cold air in the kitchen, etc.)
If problems occur, then refer to the Troubleshooting Section of this manual.
•
Conclusion
1. Compare specified data to the data recorded. Adjust exhaust as necessary using adjustable
pulley on fan. Adjust supply as necessary using dampers on supply risers and adjustable pulley
on supply'fan.
2. After setting hoods to specified data, the room parameters should be checked.
3. If room parameters are not acceptable yet, the hood can be modified to improve them without
decreasing hood performance. This is an acceptable condition.
4. Use a smoke bomb to verify that the hood captures adequately. This can be your final verification.
Complete Equipment List for Performance Evaluations
• Closed End Wrenches (9/16, 'A, 7/16, 3/8, 5/16, '/ )
• Socket Set & Ratchet (9/16, 1/2, 7/16, 3/8, 5/16, 1/4)
• Extension for Ratchet
• .Cheater Bar
• Screwdrivers (Phillips &Standard, Short & Long)
• Adjustable Wrenches (Large & Small)
•
• 5/32" 9" Long Allen Wrench
• Multi -key Hex Set (Standard Assortment)
• Tape Measure, Hammers (Hard & Soft)
• 2- Channel Locks
• Vise -Grip Pliers (Medium Size)
• Shortridge Air Multimeter
• Velometer or similar unit, Edra 5LV or Davis LCA6000 recommended
• Manometer or similar unit, Dwyer Magnehelic Model #2000 -00 recommended
• Work Gloves
• 6' Step Ladder
• 20' Extension Ladder
• Tachometer (Mechanical)
• Amprobe (Volt & Amp Meter)
33
Troubleshooting
The following table lists causes and corrective actions for possible problems with exhaust hoods. Review
this list prior to consulting manufacturer.
Troubleshooting Chart
Problem Potential Cause Corrective Action
Smoke is not being captured /Low Filters are clogged Clean filters
Exhaust Extreme negative pressure in space . Increase MUA Quantity to balance
• building
Exhaust Fan operating in incorrect direction Check motor wiring to wiring diagram
. located on fan motor -
Hood overhang on appliance is not correct Hood-should overhang cooking
appliances adequately •
Exhaust airflow too low Increase exhaust fan RPM /HP
Exhaust Duct Static Pressure higher than Increase exhaust fan RPM /HP or have
design ductwork re- worked
No Exhaust Exhaust Fan not running Turn fan disconnect on
Check fan belts
Check circuit breaker /voltage
Exhaust Fan running backwards -Wheel should turn per rotation arrow on
fan
•
3 Phase Motor direction may be reversed
by switching any 2 leads
1 Phase Motors must be wired per their
label
Fan is on incorrect hood Make sure:electrical package is
controlling the correct fan
No Make -Up Air Make -Up Air Fan not running _ Turn Fan disconnect on
•
Check fan belts • •
Check circuit breaker /voltage
Make -Up Air Damper closed Ensure blades open on damper
Make -Up Air Fan running backwards Wheel should turn per rotation arrow on
fan
3 Phase Motor direction may be reversed
by switching any 2 leads
1 Phase Motors must be wired per their
label
Make -Up Air Duct Static Pressure higher Eliminate flexible ductwork and remove
than design number of elbows in duct.
Clogged Make -Up Air Filters Clean filters
Fire System activated or not armed Microswitch on Fire System is keeping
make -up air from operating and fire
system must be armed
Exhaust/Make -Up Air Motor cycles on Motor Over - amping Make sure motor amperage is below FLA
and off of motor label
Ensure motor wiring is adequately sized
Exhaust air temperature too high Increase exhaust airflow or use higher
temperature rated motor
Grease does not drain Grease trough full Clean grease trough behind hood filters
Grease dripping from hood Hood not being cleaned often enough Clean surface of hood more frequently
Exhaust rate too low Speed up exhaust fan • -
Hood is vibrating Vibrating Exhaust or MUA Fan Find source of vibration in fans and -
correct (Often times a rag or 'other debris
will be in exhaust fan wheel)
Light Globes are full of fluid Duct Leak above hood Check ductwork or fan to roof connection
for leaks and seal where necessary
34
MAINTENANCE
To guarantee trouble free operation this manufacturer suggests following 'these guidelines.
Most problems associated with hoods are directly related to poor service and maintenance such as not
replacing or cleaning filters.
Please record any maintenance or service performed on this fan in the documentation section located at
the end of this manual.
General Maintenance
1. Proper operation of the hood depends on how well the hood is maintained. All surfaces should
be kept free of grease build -up for sanitation reasons and to reduce the risk of fire.
2. Grease filters must always be installed and clean to reduce build -up of grease in the exhaust duct
and to allow for proper exhaust airflow.
3. Maintain all belts, motors, and electrical connections on fans attached to the hood. Ensure MUA
filters are kept clean and there are no leaks in MUA ductwork.
Daily Maintenance
1. Remove the grease baffle filters and clean in a dishwasher or soak sink daily.
2. Empty and clean grease drain and grease collection cups.
3. Carefully wipe away gritty substances clinging to stainless steel surfaces to avoid scratching.
4. Dilute 1 /2 cup of laundry detergent (e.g. Tide) with one (1) gallon of warm water.
5. Soak a clean cloth in the water detergent solution and wring out the excess water.
6. Wipe the hood surfaces moving in the direction of the grain and periodically rinsing cloth in
detergent solution.
7. Using a different clean cloth soaked in clean warm water, wipe the hood surfaces to remove all
traces of the detergent solution.
8. Wipe hood surfaces dry with a clean, dry cloth. Clean the hood temperature sensor in riser if
equipped with one.
• 9. Reapply stainless steel polish.
CAUTION
DO NOT use iron wool (Brillo or SOS pads), scrapers, or spatulas to clean hood!
DO NOT use the following substances on or around the hood:
1. Chlorine or chlorine based substances.
2. Acids (e.g. acetic, hydrochloric, sulfuric).
3. Chloride based substances (e.g. mercuric chloride, ferric chloride).
• Vapors of the above substances can corrode stainless steel!
Quarterly Maintenance
1. Inspect the unit and duct for grease or air leaks and repair leaks where required.
2. Clean ductwork attached to hood to prevent a mass accumulation of grease.
35
Start-Up and Maintenance Documentation
START -UP AND MEASUREMENTS SHOULD BE PERFORMED AFTER THE SYSTEM HAS BEEN
AIR BALANCED (Warranty will be void without completion of this form)
Job Information •
Job Name Service Company
Address Address
City City
•
State State
Zip Zip
Phone Number Phone Number
Fax Number Fax Number
Contact Contact
Purchase Date Start-Up Date
Hood Information
Refer to the start-up procedure in this manual to complete this section.
Name Plate and Unit Information
Model Number
Job Number
Maintenance Record
Date Service Performed Date Service Performed
•
Factory Service Department
Phone: 1- 866 - 784 -6900
Fax: 1- 919- 554 -9374
A0011051
December 2011 Rev. 7
` r.
Non- Welded Double Wall Grease Duct Systems
Installation, Operation, - and - Maintenance Manual
(bp, Lou\
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•
AVM
FOR YOUR SAFETY
TWO MAJOR CAUSES OF GREASE DUCT RELATED FIRES: (1) FAILURE TO MAINTAIN
REQUIRED CLEARANCE (AIR SPACE) TO COMBUSTIBLE MATERIALS AND (2) FAILURE TO
CLEAN GREASE LADEN DUCTS. IT IS OF UTMOST IMPORTANCE THAT THIS GREASE DUCT
BE INSTALLED ONLY IN ACCORDANCE WITH THESE INSTRUCTIONS. DO NOT INSTALL
GREASE DUCT WITHOUT FIRST READING THESE INSTRUCTIONS VERY CAREFULLY.
This grease duct is ETL listed to standards UL1978 / UL2221 / ASTM E2336 and AC101, grease
duct installed per these instructions meets the requirements of NFPA 96.
Grease duct installed in accordance with these installation instructions will comply with
national safety standards and building codes.
A0018672
October 2011 Rev. 6
T r
TABLE OF CONTENTS
WARRANTY 3
LISTINGS 4
CLASSIFICATIONS 4
APPLICATION 4
CLEARANCES 5
MECHANICAL 6
Joint Sealant 6
Sealant Features 6
Table 2 — Sealant Usage Chart 6
Grease Duct Joint Assembly 7
Adjustable Duct & Transition Connection 8
Adjustable Duct Standard Installation 9
Risers — Factory & Field (Bolted) Risers 11
Duct Drains 12
Manifold Tee 12
Access Door (Tee Cap) Assembly 13
Fan Adapter Plate 14
Prevention of Grease Accumulation in Horizontal Grease Duct 14
Alignment & Bracing of Grease Duct 14
Horizontal Support & Support Spacing 14
Vertical Support & Vertical Support Spacing 16
Through Penetration & Fire Stops 21
Annular Distance 21
Floor& Ceiling Fire Stop Installation 22
Wall Fire Stop Installation • 23
Grease Duct Assembly Examples 24
METHODS USED TO TEST DUCT AFTER ASSEMBLY 27
Method 1 — Light Test per IMC 506.3.3.1 27
Method 2 — Smoke Test 27
GENERAL DUCT WEIGHTS 27
Weight — DW -2R 27
Weight — DW -3R 27
Weight — DW -3Z 27
Weight — Example 27
CLEANING & MAINTENANCE RECORD 28
2
WARRANTY
- — This- ductwork system is warranted to be free from defects in material- and workmanship, under normal use - and service, for a period of 12 months from the date of shipment. This warranty shall not apply if:
1. The equipment is not installed by a qualified installer per the MANUFACTURER'S installation
instructions shipped with this product (this guide should be kept with the equipment once installation
is complete),
2. The equipment is not installed in accordance with federal, state and local codes and regulations.
3. The equipment is misused or neglected.
4. The equipment is not operated within its published capacity.
5. The invoice is not paid within the terms of the sales agreement.
The MANUFACTURER shall not be liable for incidental and consequential losses and damages potentially
attributable to malfunctioning equipment. Should any part of the equipment prove to be defective in material
or workmanship within the 12 -month warranty period, upon examination by the MANUFACTURER, such
parts will be repaired or replaced by the MANUFACTURER at no charge. The BUYER shall pay all labor
costs incurred in connection with such repair or replacement. Equipment shall not be returned without
MANUFACTURER'S prior authorization and all returned equipment shall be shipped by the BUYER, freight
prepaid to a destination determined by the MANUFACTURER.
•
3
LISTINGS
This grease duct has been tested and is listed to UL1978 and UL2221 and testing has been extended to
recognize ASTM E2336 and AC101 due to similar testing criteria. Models 2R, 3R and 3Z are used for
grease duct applications when installed in accordance with these instructions and National Fire Protection
Association "NFPA 96 "; Standard for Ventilation Control and Fire Protection of Commercial Cooking
Operations.
CLASSIFICATIONS
UL 2221: Standard for Fire Resistive Grease Duct Enclosure Assemblies. Chapter 7 of this standard
references a test labeled Internal Fire Test. Section 7.1.1 references two installation conditions, Condition A
and Condition B. Condition A represents all installation conditions except for installation within non - ventilated
combustible enclosures. Condition B represents installation within a non - ventilated combustible enclosure.
•
Model 3Z is classified under UL2221 (Test of Fire Resistive Duct Enclosure Assemblies) as an alternate to 2-
Hr. fire resistive shaft enclosures with a minimum zero clearance to combustibles (sizes 8" to 24" diameter).
Model 3Z is listed in accordance with the requirements for duct enclosure Condition A and B.
Model 3R is classified under UL2221 (Test of Fire Resistive Duct Enclosure Assemblies) as an alternate to 2-
Hr. fire resistive shaft enclosures with a reduced clearance to combustibles (sizes 8" to 24" diameter). Model
3R is listed in accordance with the requirements for duct enclosure Condition B.
Model 2R is classified under UL2221 (Test of Fire Resistive Duct Enclosure Assemblies) as an alternate to 2-
Hr. fire resistive shaft enclosures with a reduced clearance to combustibles (sizes 8" to 16" diameter). Model
2R is listed in accordance with the requirements for duct enclosure Condition B.
APPLICATION
Double wall grease ducts are listed for a continuous internal . temperature of 500 °F and intermittent
temperatures of 2000 °F. Double wall grease duct is ideally suited for use in commercial cooking installations
for the removal of smoke and grease laden vapors. Grease duct system size and capacity information may
be obtained from the ASHRAE Handbook — Fundamentals or from the Air Pollution Engineering Manual of
the US Environmental Protection Agency. Grease duct installations require provisions for cleaning the interior
of the duct. NFPA 96 cleanout requirements are as follows:
1. A cleanout must be provided at each change of direction, except where the entire length of duct can
be inspected and cleaned from either the hood or the discharge end.
2. On horizontal duct runs, at least one (1) 20" diameter opening must be provided. Where the opening
is smaller than 20" diameter, openings large enough to permit cleaning must be provided at intervals
of no more than 12'.
3. Openings must be at the side or the top, whichever is more accessible. When the opening is on the
side of the duct, the lower edge of the opening must be at least 1 ' /z" above the bottom of the duct.
For the listed grease duct, this is accomplished by the use of the grease manifold tee and cleanout
cap.
4. On vertical duct runs where personnel entry is possible, access must be from the top of the riser.
Where entry is not possible, access must be provided at each floor.
NOTE: ACCESS REQUIREMENTS ARE SUBJECT TO CHANGE IN ACCORDANCE WITH LOCAL CODE.
LOCAL AUTHORITIES SHOULD BE CONSULTED FOR EXACT REQUIREMENTS. GREASE DUCT MAY
BE CONNECTED ONLY TO HOODS IN A SINGLE FIRE ZONE ON ONE FLOOR. DO NOT CONNECT
GREASE DUCTS TO ANY OTHER PART OF THE BUILDING VENTILATION OR EXHAUST SYSTEM.
4
1 ,
When grease duct is installed in accordance with these installation instructions and the joints are sealed
properly with the recommended sealant,_thesystem will contain a grease fire _within_the_duct.Agrease_fire
can burn at extremely high temperatures. This system should be dismantled and inspected after any
exposure to a grease fire. Any section that is distorted or discolored should be replaced. All joints in the
system should be examined. The sealant expands to ensure a positive seal in the case of a fire, and any
sealant that has been exposed to high temperature must be replaced. This will ensure that the system
maintains its integrity against fire conditions in the future. The manufacturer of this grease duct cannot be
responsible for grease duct systems that are not properly maintained or have been subjected to one or more
grease fires.
CLEARANCES
In all buildings more than one story in height and in buildings where the roof - ceiling assembly is required to
have a fire resistance rating, the duct must be enclosed in a continuous enclosure from the lowest fire -rated
ceiling or floor above the hood, through any concealed spaces, to or through the roof to maintain the integrity
of the fire separations required by the applicable building code provisions. If the building is less than 4
stories in height, the enclosure shall have a fire resistance rating of not less than 1 hour. If the building is 4
stories or more in height, the enclosure shall have a fire resistance rating of not less than 2 hours. Single
wall grease duct is primarily intended for use in non - combustible surroundings. When installed in an open
room where enclosure is not required, double wall grease duct may be located at clearance to combustibles
in accordance with Table 1.
Table 1 — Grease Duct Clearances
DUCT INNER DIAMETER OUTSIDE CLEARANCE TO CLEARANCE TO
MODEL (ID) DIAMETER COMBUSTIBLES NON - COMBUSTIBLES
DW 8" - 24" = ID 18" 0"
DW - 2R 8" - 16" ID + 4 3/4 "* 0"
DW - 3R 8" - 24" ID + 6 3/4 " ** 0"
DW - 3Z 8" - 24" ID + 6 0" 0"
The above figures represent air space, in inches, to surrounding.
NOTE: See NFPA 96, 2004 EDITION, Chapter 3, Definition of Combustible, Limited Combustible and Non - Combustible.
*DW - ,2R:` clearance to combustibles from the surface of the duct outer shell; zero inch clearance from
combustibles from the tip of the outer V Band.
* *DW — 3R: %" clearance to combustibles from the surface of the duct outer shell; zero inch clearance from
combustibles from the tip of the outer V Band.
NOTE: Double wall duct systems with reduced clearance "R" have been tested using Condition B — installed
within non - ventilated combustible enclosure. See Fig. 1 below for representation of reduced clearance note,
the V Band may be in contact with a combustible surface.
Fig.1 — Reduc Clearance
--I r.---- 3/4" REDUCED
CLEARANCE
il
mg wil ,,,,,,,/ COMBUSTIBLE
SURFACE
DOUBLE
V BAND.
DUCT
5
MECHANICAL
Joint Sealant
The joint sealant used to-seal all joint assemblies is a 3M product. 3M Fire Barrier 2000+ Silicone Sealant is
a ready -to -use, gun - grade, one - component silicone elastomer that cures upon exposure to atmospheric
humidity to form a flexible seal. 3M Fire Barrier 2000+ Silicone Sealant, when installed properly, will'control
the spread of fire before, during and after exposure to open flames. It will stop the spread of noxious gas,
smoke and water, and maintain the integrity of fire rated assemblies and construction. All grease ducts must
be liquid tight per NFPA 96. The following steps are to be used to ensure that this requirement is met.
NO SEALANT SUBSTITUTES MAY BE USED.
Sealant Features
1. Superior adhesion.
2. Capable of withstanding 2000 °F + temperatures.
3. Class 25 sealant, per ASTM 920.
4. Re- enterable /repairable.
5. Provides up to 4 -hours fire- rating.
6. Cures upon exposure to atmospheric humidity.
7. Working time 30 minutes.
8. Cure time 14 to 21 days.
9. Applied with a standard caulk gun.
Table 2 — Sealant Usage Chart
3M FIRE BARRIER 2000 PLUS USAGE
DIAMETER DUCT PERIMETER FT AVERAGE FEET NUMBER OF
PER TUBE JOINTS PER TUBE
8" 2.16 30 7
10" 2.68 30 6
' 12" 3.21 30 5
14" 3.73 30 4.
16" 4.25 30 3.5
18" 4.78 30 3
20" 5.30 30 3
24" 6.35 30 2.5
6
Grease Duct Joint Assembly
All grease ducts are to be liquid per NFPA 96. The steps are to be used to ensure that this
requirement is met.
1. Fill the V band used with inner ductwork with 3M Fire Barrier 2000+ Silicone. The bead should be
continuous. See Table 2, for the number of joints per tube.
2. Place the loose V band over the duct flange. Apply a continuous bead of 2000+ Silicone %" wide to
the flange that will be joined.
3. Join the two flanged ends of the inner duct sections together and rotate slightly to ensure complete
coverage of sealant on flanges.
4. Install the V band around the duct flanges making sure the flanges are located within the V band.
NOTE: Do not locate the V band hardware at the bottom side of a horizontal duct joint. Tap the
outside of the V band while tightening V band hardware to make sure the flanges are aligned and
have been pulled together. Secure the % -20 hardware to 85 in -lbs.
5. Insulation must be minimum of 4 1 /" wide, and the same type and number of layers as the base duct.
Tightly pack and completely fill all voids between the inner duct and the outer shell.
6. Install the double V band ensuring the outer shell flanges are positively engaged in the V bands
before tightening the % -20 hardware to 85 in -lbs. The double V band can be sealed using 3M Fire
Barrier 2000+ Silicone when being installed outside.
Fig. 2 — Joint Assembly
STEP 1 STEP 2 STEP 3
DETAIL A
C .Z
�j 4111
Mir I�
• STEP 4 STEP 5
STEP 6
,�: —.
IMPORTANT: THE HARDWARE USED TO ASSEMBLE THIS DUCTWORK IS SPECIFICALLY
DESIGNED FOR THIS APPLICATION. NO SUBSTITUTE HARDWARE IS ALLOWED. ALL
REPLACEMENT HARDWARE MUST BE PURCHASED FROM THE FACTORY.
7
Adjustable Duct & Transition Connection
Adjustable duct sections may be used in conjunction with transition plates when they terminate at the fan.
The adjustable duct section is fully welded to the transition plate, and then connected to the standard duct
length using non - welded connections. Double wall adjustable duct sections are assembled in the field, as
the exact length needed for the application is not known. Components for outer shell and insulation ship
loose. Once fully assembled, the transition plate is secured to the curb using the method referenced in Fig.
8 _ Fan Adapter Plate.
1. The standard duct section in the adjustable assembly is installed using the standard connection
method, (see Fig. 2). Note: this is the piece with two flanges and the outer shell collar already
attached 1 '/2" from the duct flange.
2. Adjustable duct assemblies that are used with transition plates only have one inner duct flange
protruding from the outer duct shell. This is the side that connects to the standard length duct.
3. The adjustable collar is slipped on to the adjustable duct section. Make sure the adjustable collar
flanges are opposite the adjustable duct section flange.
4. The adjustable section is pushed inside the standard duct section. Make sure the minimum overlap is
set correctly; see Table 3.
5. Once the overlap is set correctly, silicone the flanges of the bottom duct section and the adjustable
collar using connection method referenced in Fig. 2 — Joint Assembly step 1 through step 3.
6. Adjustable collars are sealed to the adjustable duct using 3M Fire Barrier 2000+ Silicone. Once the V
band has been installed, tighten the adjustable collar hardware to 85 in -lbs.
7. The insulation provided is used to wrap the adjustable assembly. Ensure all voids are adequately
filled.
8. Cut the outer shell cover to the length and then install using the provided sheet metal screws. Make
sure the shell cover overlaps and are secured to the shell collars. Use only hardware provided as
longer screws may penetrate inner duct.
9. 3M Fire Barrier 2000+ Silicone may be used to seal the outer shell.
Fig. 3 — Adjustable Duct & Transition Plate
STEP ,1 TRANSITION STEP 2
STEP 3
• C PLATE.
_. 'UTERSHELL c1111
COLLAR. �I TIGHTEN
3M FIRE BARRIER COLLAR. 85IN -LBS.
2000 P LU S.
ADJUSTABLE
`�� [ -, DUCT.
10 #4*
-- ADJUSTABLE -
,,O." COLLAR. TIGHTEN
EIS 1NLBS. c �'
M FIRE BARRIER *i
2000 PLUS.
° V BAND.
TANDARD s LITER SHELL
3M FIRE BARRIER
DUCT. 2000PLUS COLLAR.
RANSITION
STEP4 PLATE. STEPS STEP6
•
CURB.
Y p7;G
INSULATION.
SCREWS
8
Adjustable Duct Standard Installation
Adjustable duct lengths are used to make up variable in duct system(s).. Adjustable sections
should always be installed with the overlap to the inside of the standard duct section. Overlap should
always be opposite the direction of airflow. This will allow grease /water to run back to the hood when the
system is shut down. If the inner adjustable section is too long to fit into the adjacent section of duct
without interfering with the flow path it should be trimmed to the desired flange to flange length. Flange to
flange length of adjustment can range from 4" to 26 ".
1. The standard duct section in the adjustable assembly is installed using the standard connection method,
(see Fig. 2). Note: this is the piece with two flanges and the outer shell collar already attached 1 W from
the duct flange.
2. The adjustable collar is slipped on to the adjustable duct section. Make sure the adjustable collar flanges
are opposite the adjustable duct section flange.
3. The adjustable section is pushed inside the standard duct section. Make sure the minimum overlap is
set correctly see Table 3.
4. Once the overlap is set correctly, silicone the flanges of the bottom duct section and the adjustable collar
using connection method referenced in Fig. 2 — Joint Assembly step 1 through step 3.
5. Adjustable collars are sealed to the adjustable duct using 3M Fire Barrier 2000+ Silicone. Once the V
band has been installed, tighten the adjustable collar hardware to 85 in -lbs.
6. The insulation provided.is used wrap the adjustable assembly. Ensure all voids are adequately filled.
7. Cut the outer shell cover to the length and then install using the provided sheet metal screws. Make sure
the shell cover overlaps and are secured to the shell collars: Use only hardware provided as longer
screws may penetrate inner duct.
8. 3M Fire Barrier 2000+ Silicone may be used to seal the outer shell.
Table 3 — Minimum Overlap
DIAMETER MIN OVERLAP FOR
ADJUSTABLE
• DUCT
8 ., 4 „
10" 5"
12" 6"
14" 6"
16" 6"
18" 6"
20" 6"
24" 6"
9
Fig. 3a — Adjustable Duct Overlap -
INSTALLED LENGTH .
MIN. SEE TABLE 3.
. 1 1 it Ii
AIRFLOW DIRECTION
in
H 1 �I
Mk
• WAI .
OUTER SHELL ADJUSTABLE:
COLLAR. V BAND. SECTION.
DUCT SECTION. ADJUSTABLE
COLLAR.
Fig. 3b — Collar & Adjustable Duct Installation
STEP 1 STEP 2 STEP 3
3M FIRE BARRIER 4 cia!ff
2000 PLUS. ADJUSTABLE 00 1RE BARRIER
my DUCT.
„,--'"------ [I- ADJUSTABLE -1 __ --
:,
COLLAR. - °
41111 j_ TIGHTEN
85 IN -LBS.
STANDARD I D TIGHTEN p
DUCT. C, 85IN•LBS. [
STEP 4 STEP 5
2:i7-1- INSULATION.
- "Iiii M ETAL OUTER SHELL
COVER.
SCREWS.
INSULATION.
10
Risers = Factory & Field (Bolted) Risers
There are two options for the riser (connection to the hood plenum); factory welded and field bolted. Factory
installed risers are welded to the plenum per instructions that detail riser size and location. The instruction
below covers field installed (bolted) riser(s). When field installed riser(s) are requested, they ship loose
allowing the installer to decide on the location. Field installed riser(s) are preferred when the exact location is
not known or when adjustments need to be made for misalignment in duct systems.
1. Locate the specific position at which the riser needs to be installed.
2. Use the riser as a guide when marking the hood. Note: Make sure the hole location is inside the
plenum area before cutting any holes.
3. Since the riser is going to be bolted to the plenum, a bolt hole circle will need to be cut. Use the
bottom or loose retaining ring as a template. Align the inner circles of the hole in the plenum with the
retaining ring and mark the bolt hole circle. Make sure the bolt hole circle is inside the plenum area
before cutting.
4. Use the 3M Fire Barrier 2000+ Silicone to seal around the riser hole. Apply sealant to the top and
bottom of the hole. Make sure the silicone bead is a minimum of 1 /4" thick and is continuous inside
and outside of the bolt hole circle.
5. Center the riser over the hole in the plenum and push down. Make sure the riser flange is positively
sealed. Also, make sure the captured retaining ring on the riser is pushed down into the sealant.
Sealant should come throughthe holes on the ring.
6. Align the loose retaining -ring with the hole on the inside of the plenum. Push the ring up into the
sealant.- Align the holes in the bottom and top retaining rings and secure using %4 =20 hardware.
7. Place the loose duct flange ring over the riser before installing the connecting duct section using
connection method (see Fig. 2 — Joint Assembly, step 1. through step 3).
8. Once the riser and connecting duct section(s) have been connected, install the insulation provided.
Make sure all voids are filled.
9. Install the riser covers by pushing the two halves together around the duct flange ring and securing it
using sheet metal screws provided. Use only hardware provided, as longer screws may penetrate
the inner duct.
10. See Fig. 2 — Joint Assembly, step 1 through step 3, to install standard duct sections to factory
installed or welded risers.
11. The slots in the riser covers provide an opening for the installation of duct sensors if required.
Fig. 4 — Field Installed Riser — Bolted
STEP 1 - . STEP 2
3M FIRE BARRIER RISER.
2000 PLUS: DOUBLE WALL
DUCT.
y..� V BAND..�
\V®, DUCT FLANGE
RING ING
HOOD TOP.
RETAINING � `ems -y
RINGS • 1/420 HARDWARE
V BAND STEP 4 STEP 5
RISER COVER.
HOLE FOR DUCT SEAT
� 't� � 1 INSTALLED �'�'\
1, HERE t
o
:(
INSULATION
SHEET METAL
RISER COVER. SCREWS.
11
Fig. 5 — Duct Drain
Duct Drains
Drains are used to provide a point at which low DUCT SECTION.
points in the duct system can be drained.
Condensation and low lying water left over from duct DOUBLE V TEE.
cleaning can be drained easily with the installation of BAND.,
the ball, valve drain. Drains are designed to aid in ADAPTER
duct cleaning and can be used to drain grease into �� rlfit an approved grease collection•reservoir. Drains can be hard piped to an approved grease collection �� reservoir, remove the cap and connect to the 1 -1/2"
NPT threads (see Fig. 5. for details).
ADAPTER.
Manifold Tee DRAIN.
The manifold tee is used to provide access for •
cleanout to comply with NFPA 96 requirements. It is equipped with an internal blank that acts as a grease
dam and gasket. The access port is then closed with a cleanout cap or tee cap: The tee cap.is then covered
with layers, of insulation that is covered in an outer shell. called the access door collar. The location of the
access port in the tee is dependent on the orientation of the tee in the final installation. The access port
location in the manifold tee can be orientated as required (see Fig. 6). Access ports should never be located
where grease can build up and fall out once the cleanout cap is removed or where the access door collar
cannot be removed to gain access to the inner duct.
Fig. 6 - Manifold Tee Position
OUTER DUCT INNER DUCT .
SHELL TEE
11 ■ IMin n1M1=1io
1
•
ACCESS DOOR ACCESS DOOR
RIGHT. LEFT., • •
ACCESS DOOR •
• • TOP INSULATION
• 1111___- GREASE DAM
ni \ CNI 17 I I I I I : I 1 7-
ACCESS DOOR
REMOVED FOR
CLARITY.
12
Access Door (Tee Cap) Assembly
Access doors (tee caps) are available in diameters from 8" to 24 ". - They wofk in conjunction with the
manifold tee as previously shown in Fig. 6. The tee joint connection is shown in Fig. 2 — JOINT
ASSEMBLY; however, the installation of the access door is slightly different so read the following
instructions very carefully. Consult NFPA 96, Chapter 7, Section 7.3.1 "Openings shall be provided at the
sides or at the top of the duct, whichever is more accessible, and at change of directions."
•
1. Select the location and the position of the access door.
2. All tee joints .will be connected as shown in Fig. 2 — JOINT ASSEMBLY except for the access door.
3. Apply a . '/4" continuous bead of 3M Fire Barrier 2000+ silicone to the flange of the tee that will be
used for access to the duct system.
4. Center the inside blank (grease dam) over the opening of the tee and apply pressure. Make sure the
grease dam is sealed to the tee flanges.
5. Apply enough pressure to create a positive bond between the tee flange and the grease dam.
Remove excess sealant after making parts concentric (centered).
6. Sealant will begin to cure upon exposure to atmospheric humidity. It will form a flexible seal.
7. Once the sealant is dry attach the access door using a V band. Ensure flanges are in the V before
tightening Y< -20 hardware to 85 in -lbs.
8. Once the inner access door assembly is complete install the outer access door or access door collar.
9. The outer access door collar is used to seal the inner access door with insulation, (see Fig. 7 below).
Fig. 7 - Access Door Assembly
INNER DUCT
TEE.
ACCESS DOOR
INSULATION. COLLAR V BAND .
•
ER
OUT DUCT
SHE �� ` ---
/
•
i "Sr LAYER S
(f, ACCESS DOOR
INSULATION.
OUTERACCESS
INNER _ DOORVBAND.
V BAND. //-
GREASE r 4
{( ' DAM. ! � , " l
1 /
INNER Vii ,,.
ACCESS
DOOR.
ACCESS DOOR
COLLAR.
OUTER
ACCESS
DOOR.
13
•
Fan Adapter Plate Fig. 8 — Fan Adapter Plate
The fan adapter plate (Transition Plate) is designed to connect
to a roof curb. The duct section is welded to the underside of
the adapter plate. The adapter plate is formed to provide a � p EXHAUST FAN.
slope to allow grease deposits to flow back towards the duct.
When connected (see Fig. 8), the plate mounts on top of the fan PRtATNEITION =r
curb that supports the fan housing. The plate may be positioned ERAMIC
off center within the curb provided that the minimum distance to GASKET.
combustibles is maintained. In the event that the plate is CUUWRB. ((O>
positioned off center, trim off excess plate material to allow for •
fan placement. Secure the plate to the curb using a minimum of l
three fasteners per side. A suitably sized fastener provided by ( . VERTICAL
others is used. The fan adapter plate can be used to maintain ADJUSTABLE SUPPORT.
distance to combustibles and also for vertical support. See Fig.
DUCT SECTION.
3 for adjustable duct section assembly. The top collar is
installed upside down to seal the insulation at the fan
termination / transition plate.
Prevention of Grease in Horizontal Grease Duct
In some areas the local code authority may insist on inclusion of '' /," per foot slope. In such cases, a short
"Slope Transition" section is available from the factory. For correct installation, two slope transitions are
generally required - one at the beginning and end of the horizontal duct run. For installations with horizontal
runs greater than 75 feet, some local codes demand a %" per foot slope. Consult with local code authorities -
if unsure about local requirements. Offset collars have been designed to meet the above specification. The
collar is used in conjunction with other accessories such as tee's and elbows to maintain the above listed
slope in horizontal duct runs.
Alignment & Bracing of Grease Duct
Grease duct has the characteristics of a continuous stainless steel pipe and it will expand and contract along
its entire length with changes in temperature. For this reason, conventional methods of attaching guides and
braces to the outer wall of the grease duct cannot be used. Correctly installed support rings, saddles and
wall guide assemblies will serve to keep the duct aligned, provide for adequate resistance to lateral loads
and allow the free axial expansion and contraction movement. A simplified rule for duct expansion is that the
axial growth will be approximately 1 inch per 100 feet'of pipe length for each 100 degrees Fahrenheit the
exhaust vapor temperature is above the surrounding air temperature.
Horizontal Support & Support Spacing Table 4 — Horizontal Support Spacing
Horizontal duct runs are supported using 2 X 2 X 1/8" angle,
Uni -strut and or Uni -strut / saddle combination. Horizontal DIAMETER HORIZONTAL
support spacing is shown in Table 4. When cutting the angle or _ SUPPORT SPACING
Uni -strut to length, there must be a minimum of 2" on either side (FEET)
of the duct shell to allow for rod attachment. Once the angle 8" 7'
has been cut to length it is suspended using 1/2" threaded rod
(minimum). Appropriate sized holes are drilled / punched in 10" 7'
either end of the angle. The 1/2" threaded rod is secured to the 12" 7'
angle or Uni -strut using '/z' grade 5 hex nuts and %" hardened 14" 7'
washers, see Fig. 9. Note: double hex nuts are used as locking 16 7'
nuts to make sure hardware does not come loose over time.
18" 5'
20" 5'
24" 5'
14
Fig. 9 — Horizontal Support Details
1/2" THREADED DUCT SECTION.
RODS. —\
CENTER I V BAND.
e
„
I ,
....\\
Ai; Tie to 1 n 1 ! i
DUCT
DUCT DIA. UNI STRUT. ad 1-.6 SEE TABLE 4
PLUS
UNI STRUT - BOTTOM CONNECTION --. CENTER
DUCT 1
1!r THREADED
RODS.
12 ° THREADED - efill
RODS.
t 1
12' HARDENED SADDLE. I
• UNI STRUT. .V WASHERS 2 PLC'S. l
/111 UNI STRUT \�\ /�/
12 ' HEX NUTS
L . E JJ GRADE 5.4PLC'S. /
I I
•g 1.... DUCT DIA. _
SADDLE - TOP CONNECTION • SADDLE - BOTTOM CONNECTION
1/2" THREADED
1/2" THREADED 112" HEX NUTS RODS. SADDLE.
RODS _ GRADE 5, 2 PLC'S (BOTTOM)
1/2" HARDENED
l�'_ WASHERS 2 PLC'S
; 1/2" HARDENED
1111 WASHERS 2 PLC'S
in SADDLE. '
{TOP} UNI STRUT. Imo
1
MIS 1 1/2" HEX NUTS
II wi GRADE 5.4 PLC'S.
IGIT
r
15
Vertical Support & Vertical Support Spacing
This duct system requires supports along vertical runs. The vertical support (DWXXDWVESU) assembly kit
consist of (2) wall support plates, (2) side support plates, (2) flat support plates (specific to shell diameter)
and hardware. There are three different types of hardware supplied depending on the type of wall that the
duct is being supported. There are three, types of wall construction listed below; gypsum with wooden studs,
gypsum with 25 gauge steel studs and concrete /masonry. Each wall construction type requires different
hardware to be used when installing the wall support and side support plate. Maximum vertical support
spacing is shown in Table 5. Do not exceed this listed vertical spacing.
Table 5 - Vert Support Spacing
DIAMETER VERTICAL SUPPORT SPACING (FEET)
8" 10'.
10" 10'
12" 10'
14" 10'
16" 10'
18" 10'
20" 10'
24" 10'
Fig. 10 — Vertical Support Kit
WALL SUPPORT PLATE.
��-- -•. _ FLAT SUPPORT PLATE
- : ... # ' . ." ... ..
lir
=•.. Vii'..;:_. ''! % - =..
5/16 -18 WHIZ NUTS 8: BOLTS ,~'.+ ;.::- --,. '
• USED TO SECURE TO TOP ' '
PLATE TO THE SIDE PLATE. • ,.. '•+. .
V L DRILUNO
- - SCREWS 5116 18 X USED SE T O SECURE
DOUBLE WALL DUCT SHELL.
.. a ` IDE SUPPORT PLATE.
.0 ,- .
ALL SUPPORT PLATE.
16
Fig. 10a — Vertical Support Details
DUCT
SYSTEM.
DU CT VERTICAL SUPPORTS DOUBLE WALL MATERIAL
HAVE SPECIFIC INSTALLATION V BAND. SEE INSTALLATION
INSTRUCTIONS PER THE TYPE moor INSTRUCTIONS PER
OF WALL CONSTRUCTION. SEE ................... CONSTRUCTION TYPE.
SPECIFIC DETAIL BELOW. DOUBLE �
TYPES OF WALL VERTICAL V BAND. IN
CONSTRUCTION: SUPPORT.
2X4 WOODEN STUDS.
2X4(25) GAUGE STUDS.
CONCRETE / MASONRY. 4 1 DUCT SYSTEM.
....„ SEE TABLE 5
DUCT SYSTEM.
V BAND INSTALLED
ABOVE THE
TOP PLATE.
HORIZONTAL
SUPPORT.
•
•
I .... •.......... CEILING. VERTICAL
••� SUPPORT.
• • "■■∎ VERTICAL NM I
. • SUPPORT. _
SELF DR ING _
5/16.18 X 1" •• - -- - - - ® I�` \
ILL h8 WHIZ NUTS I . d � II II I 10 ^ �
SCREWS. & BOLTS USED TO
SECURE TOP PLATE.
I SEE TABLE 4
17
Vertical Support For Wooden Wall
1. Wall must be constructed of 2 x 4 wooden studs with a max spacing of 24 inches on center and
• covered with 5/8 inch gypsum.
2. Install the top wall support plate so that the flat supports plates, when installed, will be under the duct
v -band. See Fig 10a for details.
3. The wall support plate has specific holes that locate the side plates so that when installed, they
match the duct outer shell diameter. Measure the.duct diameter and then measure from the•wall
plate center holes the radius to locate the first side plate. Example: if the duct being installed has a
30.inch outside shell, measure from the center of the wall plate 15 inches. This will locate the inside
of the side plate on the wall plate. Side support plate mounting holes should be on the 'outside.
4. Once the first wall support plate is located, secure to the wall using the 5/16 x 4 inch•toggle bolts and
washers. Use the 7/8 inch holes that are 24'inches on center from the side plate mounting holes. In
some cases, mounting holes may have to.be drilled to align with studs.
5. Follow the instructions above and mount the second wall support plate. Measurement will be 44
inches from :the top of the first wall support to the bottom of the second wall support. •
6. Install the side support plates. Measure from center and locate the first plate. One of the side plates
• must be installed using 5/16 x 3 1 /2 inch lag bolts and washers directly into the 2 x 4 wooden stud. Fill
all holes using the lag bolts and washer that line up with the stud. Lag bolts will secure the wall
plates and side plates to the studs.
7. Measure 24 inches from the first stud that the side plate is secured to and install 5/16 x 3 % inch lag
• bolts and washers. This will secure the wall support plate to the stud 24 inches on center.
8. Measure from center and install the second side plate. This plate may fall between studs and if so,
secure using the 5/16 x 4 inch toggle bolts and washers. •
9. Repeat the above process so that both wall supports and side plates are installed and secure.
10. Install the rear flat support plate using 5/16 nuts and bolts. Mount the duct so the v band is above
the flat support plate and secure by installing the front flat support plate. .
11. The v band "V" should be sitting on top of the flat plate. A cut out is provided in the flat plate to allow
the v band bracket to fall through so the "V" is flush with.the flat support plate
12. Secure the side support left and right plates to the duter duct shell using the 5/16 -18 x 1 inch self
drilling screws. Use the guide holes to locate the shell center and fill all holes center, center left and
center right. A minimum of 18 screws must be used on each side of the duct.
Figure 10B — Wooden Stud Wall Vertical Support
OYPSUM
, X4 WOODED
24.000 STUDS
�� l •
ALL SUPPORT PLATE. - ' U '
���) CCCl/f /
lI6 -18X 1 I(\ ALL SUPPORT PLATE.
NUTS 8 BOLTS. -
LAT SUPPORT
in
• / PLATE � _ . LAT SUPPORT PLATE
µ - 4 - •
_�� DE SUPPORT PLATE.
:..i:r:a'ilio.EENSLII 0 + �� h., �� N G 5A8X4' D OOLE BOLTS 8 WASHERS
• • t` � } � �0 �� ¢� -� - NSTALL ED R EN i , oop � � . lPPORT PLATE - MIOPMIMUM OP CAVITIES ONE -
SIDE PLATE MUST BE INSTALLED DIRECTLY
��.5 , SUPPORT PLATE -MUST BE INSTALLED
E IN 70 ASTUD USING LAD BOLTSBWASNERS
,q
f e .' • ALL SUPPORT PLATE -MUST BE INSTALLED
.,- - USINO 5116 X 3111' LAO BOLTS 8 WASHERS
DIRECTLY INTO THE 2 X 4 STUDS
f16-1111X 1' SELF
DRILLING SCREWS.
3116 X 4' TOGGLE
BOLTS 8 WASHERS.
3/18 -18 X 3117LA0 BOLTS
it WASHERS INSTALLED DIRECTLY
INTO THE 2 X 4 STUDS.
18
Vertical Support For 25 Gauge Steel Stud Wall Construction
1. Wall must be constructed of2425 gauge (minimum) steel studs with a max spacing of 24 inches
on center and covered with 5/8 inch gypsum.
2. Install the top wall support plate so that the flat supports plates, when installed, will be under the duct
v -band. See Fig 10a for details.
3. The wall support plate has specific holes that locate the side plates so that when installed, they
match the duct outer shell diameter. Measure the duct diameter and then measure from the wall
plate center holes the radius to locate the first side plate. Example: if the duct being installed has a
30 inch outside shell, measure from the center of the wall plate 15 inches. This will locate the inside
of the side plate on the wall plate. Side support plate mounting holes should be on the outside.
4. Once the first wall support plate is located, secure to the wall using the 5/16 x 4 inch toggle bolts and
washers. Use the 7/8 inch holes that are 24 inches on center from the side plate mounting holes. In
some cases, mounting holes may have to be drilled to align with studs.
5. Follow the instructions above and mount the second wall support plate. Measurement will be 44
inches from the top of the first wall support to the bottom of the second wall support.
6. Install the side support plates. Measure from center and locate the first plate. One of the side plates
must be installed using 5/16 x 1 1 /2 self drilling screws and washers directly into the 2 x 4 metal studs.
Fill all holes using the self drilling screws and washer that line up with the stud. Self drilling screws
will secure the wall plates and side plates to the studs.
7. Measure 24 inches from the first stud that the side plate is secured to and install 5/16 x 1 % inch self
drilling screws and washers. This will secure the wall support plate to the stud 24 inches on center.
8. Measure from center and install the second side plate. This plate may fall between studs and if so,
secure using the 5/16 x 4 inch toggle bolts and washers.
9. Repeat the above process so that both wall supports and side plates are installed and secure.
10. Install the rear flat support plate using 5/16 nuts and bolts. Mount the duct so the v band is above
the flat support plate and secure by installing the front flat support plate.
11. The v band "V" should be sitting on top of the flat plate. A cut out is provided in the flat plate to allow
the v band bracket to fall through so the "V" is flush with the flat support plate
12. Secure the side support left and right plates to the outer duct shell using the 5/16 -18 x 1 inch self
drilling screws. Use the guide holes to locate the shell center and fill all holes center, center left and
center right. A minimum of 18 screws must be used on each side of the duct.
Figure 10C — Steel Stud Wall Vertical Support
• = GYPSUM.
24.030 �J/ I STEEL WS.
ALL SUPPORT PLATE. cf
FLAT SUPPORT SUPPORT PLATE
PLATE.
"C LAT SUPPORT PLATE
0.18X1'WHE � y .
NUTS BBOLTS. g' p-
uk 1- :1-.1. : ,
OQ . U 44 OESUPPORT PLATE
r : o r r � 0 . g� r� • a a '� " I IDESUPPORT PLATE -MUST BE WETALLED - i USING BuSH4'TOOGLEBOLTS&WASHERS ' 0 WHENWSTALL ®OVEROPENCANTIES OR
• 0 n'} . . 4N • 26 GAUGE STEEL STUDS.
• ✓� \ 4 ~• ' _ - / SIDE SUPPORT PLATE. MMMULM OF ONE
• 4 ~• _ INFO AASTU USING BE DRIWNO ScRBWS
• '.4 8 SIMMERS.
PLATE PPORT ALL SUPP ORT P LATE - MUST BE INSTALLED
• USING SAO X 11!! SELF DRSLINO SCREWS
8 W .SIWHS ERECTLY PITO THE2 54x3)
•AO.18x1 OAUOE STEEL STUDS.
DRBLINO SCREWS.
B XC TOGOIE
BOLTS E WASHERS_
ASH I la- SELF DRI WNO SCREWS
SMASHERS INSTALLED ERECTLY
INTO THE 2 X 4 =GAUGE STEEL STUDS.
19
Vertical Support For Concrete /Masonry Wall Construction
1. These steps describe the method to attach the vertical support t� a concrete and (or) masonry wall.
2. Install the top wall support plate so that the flat supports plates, when installed, will be under the duct .
v -band. See Fig 10a for details.
3. The wall support plate has specific holes that locate the side plates so that when installed, they
match the duct outer shell diameter. Measure the duct diameter and then measure from the wall
plate center holes the radius to locate the first side plate. Example: if the duct being installed has a
30 inch outside shell, measure from the center of the wall plate .15 inches. This will locate the inside
of the side plate on the wall plate. Side support plate mounting holes should be on the outside.
4. Once the first wall support plate is located, secure to the wall using the 5/16 x 2 1/4 inch
concrete /masonry screws and washers. Use the 7/8 inch holes that are 24 inches on center from the
side plate mounting holes. Install 5/16 x 2 1/4 inch concrete /masonry screws in each end of the wall
support plate. In some cases, mounting holes may need to be drilled.
5. Follow the instructions above and mount the second wall support plate. Measurement will be 44
inches from the top of the first wall support to the bottom of the second wall support.
6. Install the side support plates. Measure from center and locatethe first plate. Fill all holes using the
5/16 x 2'/4 inch concrete /masonry screws and washer. Concrete /masonry screws will secure the
wall plates and side plates to the wall.
7. Measure 24 inches from the first set of holes in the side plate that is secured to the wall and install
5/16 x 2 1/4 inch concrete /masonry screws and washers. This will secure the wall support plate to the
wall.
8. Measure from center and install the second side plate using 5/16 x 2'/4 inch concrete /masonry -
screws and washers.
9. Repeat the above process so that both wall supports and side plates are installed and secure.
10. Install the rear flat support plate using 5/16 nuts and bolts. Mount the duct so the v band is above -
the flat support plate and secure by installing the front flat support plate.
11. The v band "V" should be sitting on top of the flat plate. A cut out is provided in the flat plate to allow
the v band bracket to fall through so the "V" is flush with the flat support plate
12. Secure the side support left and right plates to the outer duct shell using the 5/16 -18 x 1 inch self
drilling screws. Use the guide holes to locate the shell center and fill all holes center, center left and
center right. A minimum of 18 screws must be used on each side of the duct.
Figure 10D — Concrete /Masonry Wall Vertical Support
ALL SUPPORT 24.000 CONCRETE /MASONRY.
PLATE.
FLAT SUPPORT -I'
PLATE. t ATE. SUPPORT
LATE.
II y PLATE.
'•, 0 L J r `-, FLAT SUPPORT
NUTS &BOLTS. f PLATE
11E 4 q ► xd
r - °� ,- PILATE UPPORT •
J
°a `4ry 44.000 �
� '' SIDE SUPPORT PLATE MUST BE INSTALLED
`` • .. ••�• 7� .;.4 USING 6/10 X21/4 CONCRETE /MASONRY
SCREW'S 1 I WS &WASHERS DIRECTLY
\ •• \ INTO THE WALL
‘I
\ I--
�, WA SUPPOR T PLATE • MUST BE INSTALLED
USING 6/10 X 2114• CONCRETE / MASONRY
SIDE SUPPORT SCREWS &WASHERS DIRECTLY
PLATE. INTO THE WALL -
• 0.18 X 1• SELF
DRILLING SCREWS. LL
WALL& SIDE SUPPORT PLATE • MUST BE
INSTALLED USING 6/10 X2 1/4 CONCRETE / '
MASONRY SCREWS &WASHERS DIR EC TLY
INTO THE WALL
20
Through Penetration & Fire Stops
Through floor fire stop support assemblies are used to support duct sections that penetrate a fire resistant
floor(s). The full support ring is installed under the double V band; the struts are connected to the support
ring with supplied 5/16 -18 hardware. Once the struts have been connected they are secured to the floor
using appropriate type and size fasteners supplied by others. The fire stop support is designed to support the
penetrating duct section and maintain annular distance, see Fig. 10b above for details.
When duct systems penetrate a fire resistance rated floor, ceiling and /or a wall, a fire stop kit is used to retain
the fire resistance rating on the floor and /or wall. The double wall grease duct (2R, 3R and 3Z) and the fire
stop assemblies detailed below have achieved 2 -hour ratings for integrity, insulation and stability. Testing
was conducted in accordance with the applicable requirements UL 2221, Test of Fire Resistive Grease Duct
Enclosure Assemblies.
Table 6 — Opening Size Through Penetrations
DUCT MODEL INNER 'OUTER DIAMETER SQUARE / ROUND
DIAMETER OPENING MIN /MAX
DW - 2R 8" 12" 14" - 15"
DW -2R' 10" 14" 16 " -17"
DW - 2R 12" 16" 18" - 19"
DW - 2R . 14" 18" 20 " -21"
DW - 2R 16" 20" 22" - 23"
DW - 3R / 3Z 8" 14" 16" - 17"
DW -3R /3Z 10" 16" 18 " -19"
DW - 3R / 3Z 12" 18" 20 " -21"
DW - 3R / 3Z 14" 20" 22" - 23"
DW -3R /3Z 16" 22" 24 " -25"
DW - 3R /•3Z 18" 24" 26" - 27"
DW - 3R / 3Z 20" 26" 28" - 29"
• DW - 3R / 24" 30" 32" - 33"
Annular Distance Fig..11 — Annular Distance
Grease duct is to be installed eccentrically or concentrically within
the fire stop system. The annular space between the grease duct O.D. PLUS 3' MAX.
and the periphery of the opening shall be a minimum of 1" to a
maximum of 2 "' for 1 and 2 hour fire rated floor and wall 1' MIN.
assemblies. Grease duct to be rigidly supported on both sides of r MAX.
the floor and or wall assembly. The F and T rating for the fire stop
systems shown below are rated for 2 hours. The fire stop ratings I
are applicable only when Specified Technologies Series SSS Latex API FLOORlCEILINO.
Intumescent (STI Triple S) Sealant is used. Annular distance is
measured perpendicular from the outside of the grease duct to the DUCT 0 D
periphery of the opening (see Fig. 11 for details). DUCT
21
Floor & Ceiling Fire Stop Installation
1. Cut an opening in the floor /ceiling that is a minimum of 2" and maximum of 3" larger than the outside
diameter of the duct being installed (see Table 6).
2. The grease duct can be installed eccentrically or concentrically within the opening. The distance from
the outside of the grease duct to the periphery of the opening cannot exceed 2 ". 2" is the maximum
annular distance allowed (see Fig. 11).
3. Apply a continuous %" bead of STI Triple S intumescent around the fire plates. The fire plates are
designed to fit around the duct and overlap by 1 ".
4. The fire plates are installed on the bottom side of the floor /ceiling. Push the plates up to the
floor /ceiling so the intumescent seals the plates against the floor /ceiling. Then secure using'/ -20 x 1
'/" long concrete fasteners where the plates overlap, secure using % -20 x 1" sheet metal screws.
5. Seal the topside using the intumescent seal around the duct and fire plates. Seal the edge of the
opening to the fire plates.
6. Fill the cavity using (4) layers of insulation, make sure that all voids are filled. The insulation is fully
compressed into the opening until it is'/." from the top of the opening.
7. Cover the compressed insulation with intumescent. Continue until the intumescent is level with the
top of the opening. The intumescent should overlap on to the floor /ceiling, ensuring there are no
gaps between the edges of the opening or the duct outer shell.
8. Wrap one layer of 1" x 12" provided insulation around the base of the duct and enclose with the half
enclosure bands. The insulation and bands should be touching the intumescent, do not disturb or
compromise the intumesent when installing. The enclosure bands are assembled using '/4 -20 x'/,"
hardware.
9. Install the vertical fire stop support; ensuring the full support ring is installed under the double V
band. Once in place, the legs are secured to the floor /ceiling using appropriate type and size
fasteners (see Fig. 12 for details). -
Fig. 12 — Floor & Ceiling Fire Stop Installation
STEP 1 j a STEP 2
I UCTSECTION. • —/1
DUCT SECTION. = .�
TOPSIDE. ;
SEE TABLE 6. TOP SIDE.
i " INTUMESCENT f
SEALANT. FIRE PLATES
FIRE PLATES. '- CONCRETE SECURED. INTUMESCENT
SEALANT.
SCREWS.
STEP 3 STEP 4
DUCT SECTION. "
DUCT SECTION.
TOP SIDE.
v� DOUBLE V BAND.
NSULATION.
INTUMESCENT t CONCRETE VERTICAL SUPPORT.
SEALANT. ANCHORS.
HALF CLOSURE HALF CLOSURE /
BANDS. BANDS SECURED.
22
Wall Fire Stop Installation
1. Cut an opening in the wall that is a minimum of 2" and maximum of 3" larger than the outside
diameter of the duct being installed. See Table 6.
2. The grease duct can be installed eccentrically or concentrically within the opening. The distance from
the outside of the grease duct to the periphery of the opening cannot exceed 2 ". 2" is the maximum
annular distance allowed; see Fig. 11.
3. Apply a continuous %" bead of STI Triple S intumescent around the closure plates; the fire plates are
designed to fit around the duct and overlap by 1".
4. The fire plates are installed on the backside of the wall. Push the plates up to the wall so the
intumescent seals the plates against the wall. Then secure using %-20 x 1 %" long concrete
fasteners where the plates overlap secure using % -20 x 1" sheet metal screws.
5. Apply a' " covering of intumescent sealant to the inside of the fire plates installed on the backside of
the wall. The sealant should be smooth and without any gaps on the edges of the opening or outside
of duct.
6. Fill the cavity using the insulation provided, ensuring that all voids are filled. The insulation is fully
compressed into the opening until it is' /." from the edge of the opening in the wall.
7. Cover the compressed insulation with intumescent. Continue until the intumescent is flush with the
edge of the wall opening. The intumescent should overlap on to the wall, ensuring there are no gaps
between the edges of the opening or the duct outer shell.
8. Install the fire plates on the front side of the wall. Push the plates up to the wall so the intumescent
seals the plates against the wall. Then secure using % -20 x 1 %" long concrete fasteners where the
plates overlap secure using % -20 x 1" sheet metal screws.
9. Wrap one layer of 1" x 12" provided insulation around the base of the duct and enclose with the half
enclosure bands. The insulation and bands should be touching the intumescent. The enclosure
bands are assembled using %-20 x 1" hardware. This is done on the front and back of the wall.
10. Horizontal supports are used to support the duct on either side of the wall. See Fig. 9 for details.
Fig. 13 — Wall Fire Stop Installation
STEP 1 STEP 2
WALL.
FIRE PLATES INSULATION HALF CLOSURE
BANDS
lir INSULATION.
our /4 I
DUCT SECTION ` r
, awl
CONCRETE FIRE PLATES
SCREWS
1 INTUMESCENT 1/4.20 HARDWARE
WALL.
FIRE PLATES. HORIZONTAL SUPPORT
EITHER SIDE OF OPENING
INTUMESCENT. 41111 / ' HALF DCLOSURE
CONCRETE Ari/ SCREWS
r
N
INSULATIO 1 ( 11 DUCT SECTION
1/4-20 HARDWARE
DETAIL
23
Grease Duct Installation:
Grease Duct Assembly Examples
The illustration shown provides useful
Fig. 14 - Grease Duct Installation Guide information on the installation of grease duct
systems. Each installation is specific to the
application and the job site. If you encounter a
Adjustable duct and standard ducts are situation not covered by this illustration, refer to
used to terminate at the transition plate. the guide or consult the factory. The grease duct
The duct section is fully welded to the systems illustrated in this manual have been
transition plate at the factory. tested to and comply with UL 2221, Tests of Fire
Resistive Grease Duct Enclosure Assemblies.
csma
EXHAUST FAN.
VENTED CURB. I ,
ROOF.
VERTICAL SUPPORT
INSTALLED UNDER • ADJUSTABLE DUCT.
THE DOUBLE V BAND.
DOUBLE V BAND.
STANDARD DUCT LENGTH.
} Ir st •
SEE TABLE 5. INSULATED ACCESS
DOOR COVER / TEE.
1.. .
TANDARD DU CT LENGTH.
Hr N
DOUBLE V BAND.
STANDARD DUCT LENGTH. -
46 DEGREE ELBOW. FIRST VERTICAL SUPPORT
ATJOINTOIAFTER CHANGE
IN DIRECTION INSTALLED UNDER
ADJUSTABLE DUCT.
,;, - li4M . THE DOUBLE V BAND.
INSULATED ACCESS
DOOR COYER /TEE. 1l2° THREADED ROD
NANINIUNA.
• • I ACCESS DOOR PROVIDED
�®
lb- * ( eiA II • t IHEN T ERESACHANGE
RISER COVERS. 7r `!J I 1 r I I �
r STANDARD DUCT LENGTH.
r
EXHAUST HOOD. 1'rt- SEE TABLE 4. -10-1 • 111
DUCT SENSOR.
MO
•
24
Fig. 15 - Grease Duct Installation Guide Grease Duct Installation:
The illustration shown provides useful
Adjustable duct and standard ducts are information on the installation of grease duct
used to terminate at the transition plate. systems. Each installation is specific to the
The duct section is fully welded to the application and the job site. If you encounter a
transition plate at the factory. situation not covered by this illustration, refer to
• the guide or consult the factory. The grease duct
systems illustrated in this manual have been
tested to and comply with UL 2221, Tests of Fire
Resistive Grease Duct Enclosure Assemblies.
E
EXHAUST FAN. VENTED CURB.
� SK:3
ROOF.
s • -i
ADJUSTABLE DUCT.
VERTICAL SUPPORT y
INSTALLED UNDER -- THE DOUBLE V BAND.
DOUBLE V BAND.
I
TEE - ACCESS DOORS ! '1 !
STANDARD DUCT LE N GTH.
CLEAN OUT POINTS AFTER
CHANGE IN DIRECTION.
11
INSULATED ACCESS
FIRST VERTICAL SUPPORT I DOOR COVER! TEE.
AT JOINT # 1 AFTER CHANGE
IN DIRECTION INSTALLED UNDER
THE DOUBLE V BAND SEE TABLE 5.
;01 RISER COVERS.
an
HORIZONTAL SUPPORT,
SEE TABLE 4. EXHAUST HOOD HEIGHT
HOOD
HOOD
WIDTH
COO KING
EQUIP VENT
t1
I
25
Fig. 16 - Grease Duct Installation Guide Grease Duct Installation:
The illustration shown provides useful
Adjustable duct and standard ducts are information on the installation of grease duct •
used to terminate at the transition plate. systems. Each installation is specific to the
The duct section is fully welded to the application and the job site. If you encounter a
transition plate at the factory. situation not covered by this illustration, refer to
the guide or consult the factory. The grease duct
systems illustrated in this manual have been
tested to and comply with UL 2221, Tests of Fire
Resistive Grease Duct Enclosure Assemblies.
EXHAUST FAN. I
i
ADJUSTABLE SECTION
VENTED CURB. TERMINATES AT THE
VEN TED CURB. I L I G TRANSITION PLATE.
• C ILL
ROOF.
ADJUSTABLE I L
DUCT COLLAR.
ADJUSTABLE VERTICAL SUPPORT
DUCT SECTION. � INSTALLED UNDER
INSULATION THE DOUBLE V BAND •
:arc: OUTER SHELL :Eli.
REMOVED FOR s I -at s•
CLARITY.
STANDARD DUCT LENGTH. DOUBLE V BAND STANDARD DUCT LENGTH.
■
DUCT SENSOR. ' . I `� DOUBLE V BAND. m RISER COVERS.
It'
DUCT SENSOR.
OIL
c = " -
EXHAUST EXHAUST
HOOD HOOD
•
26
METHODS USED TO TEST DUCT AFTER ASSEMBLY
Prior to the concealment -of any portion of a grease- duct - system, —a leakage- test - shall -be performed-in the --
presence of the code official. Duct shall be considered to be concealed when installed in shafts, or covered
by coatings or wraps that prevent the ductwork from being visually inspected on all sides. A light test or
approved equivalent test method (smoke test) shall be performed to determine that all joints are liquid tight.
The smoke test is used for longer duct runs while the light test is used for short duct runs; both methods are
. approved for use.
Method 1 — Light Test per IMC 506.3.3.1
A light test shall be performed by passing a lamp having a power rating of not less than 100 watts through
the entire section of ductwork to be tested. The lamp shall be open so as to emit light equally in all directions
perpendicular to the duct walls. The test shall be performed for the entire duct system, including the hood -to-
duct connection. The ductwork shall be permitted to be tested in sections, provided that every joint is tested.
Method 2 — Smoke Test
After the ductwork has been installed allow the listed sealant to cure for a minimum of 24 hours. Smoke
bombs are lit and placed at the bottom of the duct system; natural upwards drafts will pull the smoke to the
top of the duct system. Various length duct runs may require multiple smoke bombs. Once the smoke has
reached the top of the duct run, cap the duct securely. Inspect all joints for leakage.
GENERAL DUCT WEIGHTS
• The average weight of the duct, per foot of length, can be calculated using the following formulas below.
Duct design should provide adequate support to ensure duct components are not overloaded.
Weight — DW -2R
The following formula can be used to approximate the weight of total length of DW -2R double wall duct.
Inner Shell + Outer Shell +Insulation or (.0327 *L *D) + [.0218 *L *(D +4)] + [.0364 *L *(D +2)].
Weight — DW -3R
The following formula can be used to approximate the weight of total lengths. of DW -3R double wall duct.
Inner Shell + Outer Shell + Insulation or (.0327 *L *D) + [.0218 *L *(D +6)] + [.0436 *L *(D +3)].
Weight — DW -3Z
The following formula can be used to approximate the weight of total lengths of DW -3Z double wall duct.
Inner Shell + Outer Shell + Insulation or (.0327 *L *D) + [.0218 *L *(D +6)] + [.0491*L*(D+3)].
Weight — Example
The "D" value in the formulas above represents the inner duct diameter in inches. The "L" value in the
formulas above represents the total length in inches. Duct system: DW -3Z, 12" inner duct, 100 FT long.
Using the DW -3Z formula above, (.0327 *1200 *12) + (.0218 *1200 *18) + (.0491 *1200 *15) = 1825 lbs.
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CLEANING & MAINTENANCE RECORD
Date Service Performed
•
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Factory Service Department
Phone: 1- 866 - 784 -6900
Fax: 1- 919 - 554 -9374
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