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In JAN 1 1 2016 Descriptioi
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t ;' 5" 60"B
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Commercial Air Distribution Description 00M BTU POWER-VENTED SPARK IGNITION UNIT HEATER
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SI (METRIC) CONVERSION FACTORS / UNIT LOCATION
UNIT LOCATION 9. Do not install units in locations where gas ignition system
is exposed to water spray, rain, or dripping water.
. . 10. Do not install units below 7', measured from the bottom
of the unit to the floor, unless properly guarded to provide
lAppliances must not be installed where they may be exposed protection from moving parts.
o a potentially explosive or flammable atmosphere. Figure 4.1 -Combustible Material and Service Clearances
A CAUTION
1. Clearances to combustible materials are critical. Be sure
to follow all listed requirements. Access
2. Heaters are designed for use in heating applications with Side
ambient startup temperatures between-40°F and 90°F and
ambient operating temperatures between 40°F and 90°F. to
3. Do not install unit outdoors. t
4. In garages or other sections of aircraft hangars such ODINE
as offices and shops that communicate with areas used for
servicing or storage, keep the bottom of the unit at least
7' above the floor unless the unit is properly guarded.
In parking garages, the unit must be installed in accordance
with the standard for parking structures ANSI/NFPA 88A- Table 4.1 - Combustible Material Clearances O
latest edition, and in repair garages the standard for repair
garages NFPA 30A- latest edition (formerly NFPA 88B). Access Nort-Access Top of Power
In Canada, installation of heaters in airplane hangars must Model Side Side Top Bottom Exhauster
be in accordance with the requirements of the enforcing Size (A) (B) (C) (D) (Not shown)
authority, and in public garages in accordance with the 150-175 1" 1" 4" 12" 2"
current CSA-6149 codes.
5. In aircraft hangars, keep the bottom of the unit at least 200-400 1" 1" 5" 12" 3"
10'from the highest surface of the wings or engine Provide sufficient room around the heater to allow for proper
enclosure of the highest aircraft housed in the hangars combustion and operation of fan.Free area around the heater must
and in accordance with the requirements of the enforcing not be less than 1-1/2 times the discharge area of the unit.
authority and/or NFPA 409—latest edition.
6. Installation of units in high humidity or salt water Table 4.2 - Recommended Service Clearances
atmospheres will cause accelerated corrosion resulting in Access Non.-Access Top of Power
a reduction of the normal life of the units. Model Side Side Top Bottom Exhauster
Size (A) (B) (C) (D) (Not shown)
IMP
• • TANT 150-175 18" 18" 6" 22" 2"
200-400 18" 18" 6" 25" 3"
To prevent premature heat exchanger failure,do not locate
ANY gas-fired appliances in areas where corrosive vapors(i.e.
chlorinated, halogenated or acidic)are present in the atmosphere. Combustion Air Requirements
The National Fuel Gas Code defines an "unconfined space" as
Location Recommendations a space whose volume is greater than 50 cubic feet per 1,000
1. When locating the heater, consider general space and Btu/Hr input of the installed appliance(s).A confined space is
heating requirements, availability of gas and electrical 50 cubic feet or less per 1,000 Btu/Hr input of the installed
supply, and proximity to vent locations. appliance(s).
2. Avoid installing units in extremely drafty locations. Drafts Units installed in tightly sealed buildings or confined spaces
can cause burner flames to impinge on heat exchangers must be provided with two permanent openings, one near the
which shortens life. Maintain separation between units so top of the confined space and one near the bottom. Each
discharge from one unit will not be directed into the inlet opening should have a free area of not less than one square
of another. inch per 1,000 BTU per hour of the total input rating off all units
3. Be sure the structural support at the unit location site is in the enclosure, freely communicating with interior areas
adequate to support the unit's weight. For proper operation having, in turn adequate infiltration from the outside.
the unit must be installed in a level horizontal position.
4. Do not install units in locations where the flue products can For further details on supplying combustion air to a confined
be drawn into the adjacent building openings such as (tightly sealed) space or unconfined space, see the National
windows, fresh air intakes, etc. Fuel Gas Code ANSI Z223.1 (NFPA 54) or CSA-B149.1
5. Be sure that the minimum clearances to combustible Installation Code- latest edition.
materials and recommended service clearances are
maintained. Units are designed for installation on non- Sound and Vibration Levels
combustible surfaces with the minimum clearances shown All standard mechanical equipment generates some sound and
in Figure 4.1 and Tables 4.1 and 4.2. vibration that may require attenuation. Libraries, private offices
6. Units exposed to inlet air temperatures of 40°F or less, and hospital facilities will require more attenuation, and in such
may experience condensation, therefore, provisions should cases, an acoustical consultant may be retained to assist in the
be made for disposal of condensate. application. Locating the equipment away from the critical area
7. When locating units, it is important to consider that the is desirable within ducting limitations. Generally, a unit should
exhaust vent piping must be connected to the outside be located within 15'of a primary support beam. Smaller
atmosphere. deflections typically result in reduced vibration and noise
8. Maximum equivalent vent lengths are listed in "Section A- transmission.
General Instruction -All Units" of the Venting Instructions.
4 6-580.10
INSTALLATION
UNIT MOUNTING Figure 5.1 -Adjustable Mounting Brackets - To Adjust:
1. Be sure the means of suspension is adequate to support the
weight of the unit (see pages 24 and 25 for unit weights).
O
2. For proper operation and to assure that flames are directed �® 1. Remove outer side panels.
into the center of the heat exchanger tubes, the unit must be
installed in a level horizontal position. Use a spirit level to 2. "set screws'-loosen and
ensure that the unit is suspended correctly. position bracket where needed
—then tighten set screws.
3. Clearances to combustibles as specified in Figure 4.1 and
Tables 4.1 and 4.2 must be strictly maintained. 3. Re-attach outer side panels.
4.All standard units are shipped fully boxed. Larger units are
also supplied with skid supports on the bottom of the box.
The larger units may be lifted from the bottom by means of a
fork lift or other lifting device only if the shipping support skids
are left in place and the forks support the whole depth of the
unit. If the unit must be lifted from the bottom for final Figure 5.2 - Suspension Methods
installation without the carton in place, be sure to properly
support the unit over its entire length and width to prevent
damage. When lifting units, make sure the load is balanced.
5. Propeller models up to size 350 have 2 mounting holes, size
350 and above have 4 mounting holes and blower models up
to size 350 have 4 mounting holes, size 350 and above
have 6 mounting holes. Units with two point suspension (Threaded Rod Suspension)
incorporate a level hanging feature. Depending on what
options and accessories are being used, the heater may not
hang level as recieved from the factory. Do not hang heaters
with deflector hoods until referring to the"Installation Manual
for Deflector Hoods"and making the recommended Tl�j
preliminary adjustments on the heater, while the heater is
resting on the floor. The units can be mounted with 3/8"-16
threaded rod as follows: (Suspension with Pipe Adapter Kit),
• On each piece of threaded rod used, screw a nut a
distance of about 1" onto the end of the threaded rods that
will be screwed into the unit heater.
• Place a washer over the end of the threaded rod and
screw the threaded rod into the unit heater weld nuts on
the top of the heater at least 5 turns, and no more than
• 10 turns. Tighten the nut first installed onto the threaded
rod to prevent the rod from turning.
• Drill holes into a steel channel or angle iron at the same
center-line dimensions as the heater that is being installed. •
The steel channels or angle iron pieces need to span and
be fastened to appropriate structural members.
• Cut the threaded rods to the preferred length, place them
through the holes in the steel channel or angle iron and
secure with washers and lock nuts or lock washers and
nuts.A double nut arrangement can be used here instead
of at the unit heater(a double nut can be used both places
but is not necessary).
• Do not install standard unit heaters above the maximum
mounting height shown in Table 19.1.
NOTE: A pipe hanger adapter kit, shown in Figure 5.2 is
available as an accessory. One kit consists of two drilled
3/4" IPS pipe caps and two 3/8" - 16 x 1-3/4" capscrews to
facilitate threaded pipe suspension.Two kits would be
required for PDP unit sizes 350 and 400 and all BDP units
except size 350 and 400, and 3 kits for BDP unit sizes 350
and 400.
• II
6-580.10 5
INSTALLATION - VENTING
in Table 6.1, making the vent system as straight as
I WARNING possible. The equivalent length of a 5" elbow is 6'and for a
6" elbow is 7'.
1. Gas fired heating equipment must be vented -do not A5. A minimum of 12"straight pipe is recommended from the
operate unvented. flue outlet before turns in the vent pipe.
2. A built-in power exhauster is provided -additional external A6. Horizontal sections of vent pipe are to be installed with a
• power exhausters are not required or permitted. minimum downward slope from the appliance of 1/4" per
3. If an existing heater is being replaced, it may be foot and suspended securely from overhead structures at
necessary to resize the venting systems. Improperly sized points not greater than 3'apart.
venting systems can result in vent gas leakage or the A7. Fasten individual lengths of vent together with at least
formation of condensate. Refer to the National Fuel Gas 3 corrosion resistant sheet metal screws.
Code ANSI Z223.1 (NFPA 54) or CSA B149.1 - latest A8. Keep single wall vent pipe at least 6"from combustible
edition. Failure to follow these instructions can result in materials. For double wall vent pipe, follow the vent pipe
serious injury or death. manufacturer's clearances to combustibles. The minimum
4. Under no circumstances should two sections of double distance from combustible materials is based on the
wall vent pipe be joined together within one horizontal combustible material surface not exceeding 160°F.
vent system due to the inability to verify complete seal of Clearance from the vent pipe (or the top of the unit) may be
inner pipes. required to be greater than 6" if heat damage other than fire
could result (such as material distortion or discoloration).
A9. Avoid venting through unheated space when possible.
A CAUTION When venting does pass through an unheated space or
if the unit is installed in an environment that promotes
Installation must conform with local building codes or in the condensation, insulate runs greater than 5'to minimize
absence of local codes, with the National Fuel Gas Code, condensation. Inspect for leakage prior to insulating and
ANSI Z223.1 (NFPA 54) - latest edition. In Canada installation use insulation that is noncombustible with a rating of not
must be in accordance with CSA 8149.1. less than 400°F. Install a tee fitting at the low point of the
vent system and provide a drip leg with a clean out cap as
shown in Figure 8.1.
Model PDP and BDP unit heaters must be vented with the
proper passageway as described in these instructions to convey Table 6.1 - Vent Pipe Diameters, Transitions, and
flue gases from the unit or the vent connector to the outside Total Equivalent Vent Pipe Lengths for Horizontal
atmosphere. Vent Systems
The venting instructions are organized in sections, based on Model Vent Transition Vent Pipe Minimum Maximum
installation type.The sections are identified as follows: Size Included Diameter Eqv Length Eqv Len th
Applicable Installation Instructions 150,175 4"to 5" 5" 2' 60'
Instructions by Vent System Type 200 6"to 5" 5" 2' 60'
A General Instructions for ALL Installations 250-400 Not required 6" 2' 70'
• B VERTICAL CATEGORY I vent systems Figure 6.1 - Venting Through Combustible Roof or Wall
C HORIZONTAL CATEGORY III vent systems
Single Wall Vent Pe Double Wall Vent Pippe C%
O The differences between vertical and horizontal vent systems will be identified in Specified Specified
"Section A-General Instructions-All Units". t� Terminal Li Terminal
Section A - General Instructions - All Units /Flashing /Flashing
Al. If the unit heater being installed is replacing existing r r
equipment and using the existing vent system from that R R
equipment, inspect the venting system for proper size and \ \
horizontal pitch, as required in the National Fuel Gas Code, L Listed Clearance Specified
ANSI Z223.1 (NFPA 54) or CSA B149.1 Installation Code- Thimble by Type B Vent Mfg.
latest edition and these instructions. Determine that there is
no blockage or restriction, leakage, corrosion and other
deficiencies, which could cause an unsafe condition. single Double
Wall
A2. The vent pipe should be galvanized steel or other suitable Wall
corrosion resistant material. Follow the National Fuel Gas Specified
Single Wall Vent Pine Terminating L/ Terminal
Code for minimum thickness of vent material. The minimum with Double wall vent oigg O
thickness for connectors varies depending on the pipe
diameter. Do not vent unit with PVC or other forms of Clearance Specified
plastic venting material. by Type B Vent Mfg.
gle NP
A3. All heaters come with a vent adapter for attaching the vent Wall
pipe to the heater (see Table 6.1).Attach the vent pipe to specified
the adapter with 3 corrosion resistant screws. (Drill pilot Single Wall Vent Pipe t_� Terminal
holes through the vent pipe and adapter prior to screwing in �r
place). Vent pipe must not be smaller than the connector size. Listed /
A4. Limit the total equivalent vent pipe length to fall between Thimble
the minimum and maximum equivalent vent lengths given 0 See Instruction Al2 for attaching single wall pipe to double wall pipe.
6 6-580.10
it