Specifications 1 ..\ 6))0?,,odc)ciii-,
Installation
I.
Instructions
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Contents
8.30
Unit Dimensions 2 -3
PGB / PGAC 1. Safety Labeling / Signal Words . 4
PG M F / PG M D" H" 2. Safe Installation Requirements . 4
3. Locating the Unit 5
SERIES 4. Gas Supply and Piping 8
Three 5. Electrical Wiring 11
hree Phase 3 to 5 Ton
6. Ductwork 11
Direct Drive Blower 7. Economizer 12
8. Start-up Procedures 13
9. Operation 14
10. Maintenance 15
11. pigging Instructions 20
UL
COMBINATION UNITS
c Ui. GAS HEAT/ ELECTRIC COOL
Printed in U.S.A. 509 011101 01 5 -24-96
LP -1
Replaces 1067953
I I Installation Instructions Combination Units J
"B" CHASSIS UNIT DIMENSIONS
COMBINATION GAS/ ,, •
ELECTRIC UNITS
"B" Chassis
(47 x 47
DIM. INCHES MILLIMETERS "C" ng„
A 32 -1/2 826 '
`�� < <
B 47 -3/8 1203 * )
C 47 -3/8 1203 \ � .,
D 3 -1/8 79 7
E 11-1/8 283
F 12 306
G 14 -1/4 363
H 14 -1/4 363
•
I 12 306 „
J L 4 102
K 3/4 &1 19 &25 0
L 4-1/4 108 ° '
M 4 -3/8 111
/ - r
N 14-1/2 368 '
P 12-1/4 311 ° "D H I 4�
Q 12 -1/8 308 D' "H”
R 14-1/4 363 0
S 12 -1/4 318 1 0 0 -- /
2-1/2"
(63.5) (12.7) CONDUIT ^ CONDUI T ( "K" DIM CALPOM
C II 0 0
3" (76.2) CONDUIT
�'!� 0
Q 1/T / �
O LOW VOLTAGE �
1- 1/2" o- 0 „�„
21 -1/4" (38.1) -E:,.
38.1) N' ,S„
(539.75) O GAS CONNECTION ION
CT ` "L "< ��
11 -1/8" '
(282.575) -0 0�� \/
(101.6) 6)
0 0
ROOF CURB UNIT BASE SHOWN SEPARATELY
for units in TO ILLUSTRATE BOTTOM
"B " Chassis DUCT OPENINGS
(47 X 47
DIM. INCHES MILLIMETERS
A 42 -3/4 1086
B 39-3/4 1010
C 18 457
D 18 457 ■
E 3-3/4 95
F 39 -3/4 1086
G
G 39 -3/4 1010
H 18 457
K' 14 356
■
. , 1°°//.° N "Elf "I >
„F„ „ ' m ` ,
- ' li
K11
80 -10 -12
■
*ROOF C U R B S A R E A L S O A V A I L A B L E I N 8'(203) A N D 2 4 ' (6 1 0) HEIGHTS (K DIMENSION) .
El
l Combination Units Installation Instructions 1
"C" CHASSIS UNIT DIMENSIONS
2 -1/2"
. (63.5) —> ECTRICA
3" (76.2) 0 CONDUIT ( "K" DIM.)
o LOW VOLTAGE
t 1/2" (12.7) CONDUIT
1 -1/2-0 o —
21 -1/4" (38.1) L . / • ��1.-
(539.75) GAS CONNECTION • l Y -)
0 1/2" (12.7) PIPE,) .
(28575) �(,01.6—
•
eff
fe
! , T "
t tirr,ti
t T Zt, -0
o r ;thy
COMBINATION GAS/ .; �s�- Sff
ELECTRIC UNITS o "G" H '� l f rr
"C" Chassis N / I
(47 x 73) G / I
DIM. INCHES MILLIMETERS I , 'M
A 36 914 l � � j B 47 -3/8 1203 ,= j� i� I
C 73 1354 I / „
D 4 -5/8 117
E 15 361 \�
F 12 307 ,1 a' /
G 18-3/4 476
H 18-3/4 476
1 12 306 l,,,,
J 4 102
K 1 & 1 -1/4 25 & 31 L \ ,1 � / -
L 4 -1/4 108 - p"
_ M 5-1/4 133
N 12 -1/4 311 ' UNIT BASE SHOWN SEPARATELY
P 19 483 TO ILLUSTRATE BOTTOM
Q 15 381 DUCT OPENINGS
R 19 483
S 12 -1/4 318
T 16-7/8 429
ROOF CURB
for
( Chassis
1 (47 x 73)
DIM. INCHES MILLIMETERS
A 67-3/4 1721 /
B 64 -3/4 1645 ,
C 23 584
D 23 584 � "J,
E 2 -1/2 64 „ ..; 111., ` .
F 42 -3/4 1086
G 39 -3/4 1010 � "E„
H 23 584 "G"
I 12 305
J 12 305 "F" " . _-, 'D"
K* 14 356 - '/t •
*ROOF CURBS ARE ALSO AVAILABLE IN 0•(200) AND 24•(010) HEIGHTS (K DIMENSION).
80 -10 -1
Li
I I Installation Instructions Combination Units
1. Safety Labeling and Signal Words
Danger, Warning and Caution CAUTION — Hazards or unsafe practices which COULD result in
minor personal injury or product or property damage.
The signal words DANGER, WARNING and CAUTION are used
to identify levels of hazard seriousness. The signal word DAN- Signal Words in Manuals
GER is only used on product labels to signify an immediate haz-
ard. The signal words WARNING and CAUTION will be used on The signal word WARNING is used throughout this manual in the
product labels and throughout this manual and other manuals that following manner:
may apply to the product.
Signal Words WARN■ um
DANGER — Immediate hazards which WILL result in severe per-
sonal injury or death. The signal word CAUTION is used throughout this manual in the
following manner:
WARNING — Hazards or unsafe practices which COULD result in
severe personal injury or death. CAUTION
2. Safe Installation Requirements
WARN ■ N um NOTE: It is the personal responsibility and obligation of the cus-
tomer to contact a qualified installer to ensure that the installation
is adequate and conforms to governing codes and ordinances.
Installation or repairs made by unqualified persons can CAUTION
result in hazards to you and others. Installation MUST
conform with local building codes or, in the absence of It is recommended that a qualified service technician check
local codes, with the ANSI 2223.1 -1990 National Fuel the heat exchanger integrity every two (2) years, after the first
Gas Code and the National Electrical Code four (4) years of operation.
NFPA70 -1990 or in Canada the National Standard CAN/
CGA B149.1 and CSA C.22.1 — Canadian Electrical Check Pre - existing Common Vent From Old
Code Part 1. Furnace
The information contained in this manual is intended If the installation of the combination unit involves removing an ex-
isting furnace from a common vent with other appliances, the
for use by a qualified service technician familiar with venting system will probably be too large for the remaining ap-
safety procedures and equipped with the proper tools pliances and they will not vent properly. The venting system
and test instruments. MUST be checked according to the following procedure.
NOTE: The following steps shall be followed with each appliance
Failure to carefully read and follow all instructions in remaining connected to the common venting system placed in op-
this manual can result in furnace malfunction, property eration, while the other appliances remaining connected to the
damage, personal injury and /or death. common venting system are not in operation.
1. Seal any unused openings in the common venting system .
• Installation MUST conform to the most current version of 2. Visually inspect the venting system for proper size and hor-
the following standards or a superseding standard. izontal pitch to ensure there is no blockage or restriction,
leakage, corrosion or other deficiencies which could cause
In the USA: an unsafe condition.
• . ANSI Z223.1 -1990 National Fuel Gas Code 3. Insofar as is practical, close all doors and windows and all
doors between the space in which the appliances remain-
• National Electrical Code NFPA70 -1990 ing connected to the common venting system are located
and other spaces of the building
In Canada:
4. Turn on clothes dryers and any appliance not connected to
• National Standard CAN /CGA B149.1 the common venting system. Turn on any exhaust fans,
• CSA C.22.1 — Canadian Electrical Code Part 1. such as range hoods and bathroom exhausts, so they will
operate at maximum speed. Do NOT operate a summer
• Do NOT use this furnace as a construction heater. exhaust fan. Close fireplace dampers.
• Use only the type of gas approved for this furnace (see rat- 5. Follow the lighting instructions. Place the appliance being
ing plate). inspected in operation. Adjust thermostat so appliance will
operate continuously.
• Do NOT use open flame to test for gas leak.
6. Test for spillage at the draft hood relief opening after 5 min-
• Seal supply and return air ducts. utes of main burner operation. Use the flame of a match or
4
Combination Units Installation Instructions 1
candle. (see FIGURE 1). Flame or smoke should draw to- FIGURE °1' Vent Check
wards vent pipe. ,.w
Vent Pipe Draft Hood
7. After it has been determined that each appliance remaining
connected to the common venting system properly vents Typical Gas
when tested as outlined, return doors, windows, exhaust Water Heater ®/ Match
\
fans, fireplace dampers and any other gas— burning ap-
pliance to their previous condition of use.
8. If improper venting is observed during any of the above
tests, the common venting system MUST be corrected us-
ing the appropriate tables in Appendix G in the National NOT I f fla pulls toward draft hood, this indicates adequate
Fuel Gas Code, ANSI Z223.1, 1990. venting.
3. Locating the Unit
The unit is designed for outdoor installation only. The unit may be _ , ,
FIGURE 2 Access Panels
installed on a concrete mounting base at ground level, or on a
rooftop with an adequate platform or if using as a downflow model, Burner Access
with a roof curb. Panel Blower Compartment
Panel PAS f el?
r .
CAUTION -
Do NOT operate unit in a corrosive atmosphere containing " ` � : i fa ' -
chlorine, fluorine, or any other corrosive chemicals. g £
Do NOT install the unit in a location that will permit discharged air A -
FA Compressor Compartment
from the condenser to recirculate to the condenser inlet. Panel
Access Panels
Clearances
See FIGURE 2 below for a general view of unit and location of ac The location MUST allow for minimum clearances and should not
1 cess panels. be adjacent to a patio or other area where the unit's operating
sound level might be objectionable. The combustion air inlet
openings MUST not be obstructed (see FIGURE 5). In addition,
local codes MUST be observed.
IINAFINIPANnIIIM Clearances MUST be maintained from adjacent structures to pro -
• vide adequate fire protection, adequate combustion air, and room
Carbon monoxide poisoning hazard. for service personnel.
NOTE: Filter racks need a 26" minimum clearance at front of unit
Keep blower door closed. for removal of filters. See chart below if unit is going to be placed
near combustible construction or materials.
Failure to keep blower door closed can result in bodily
injury and /or death. While minimum clearances are acceptable for safety reasons,
they may not allow adequate air circulation around the unit for
proper operation in the cooling mode. Whenever possible, it is de-
sirable to allow additional clearance, especially around the con-
denser inlet and discharge openings.
LI
I I Installation Instructions Combination Units J
Minimum Clearances and Access Panels • The unit MUST be situated to provide safe access for serv-
F (C Chassis Shown) icing.
Blower Compartment Panel • Platform may be made of either concrete or pressure
treated wood and MUST be level and strong enough to sup-
port unit weight.
B Chassis - 2" • Position platform separate from building foundation.
2 \ C Chassis - 6" . •
Install in well- drained area, with top surface of platform
36" gp / 30 above grade level.
,,� • Platform MUST be high enough to allow for proper conden-
a _ sate trap installation and drainage. See Figure 9 and
associated text for more information about condensate
!ilw^ <<�� "� drainage.
N IU
; 'i�7yy 4 nr�h � ^, „gym,
i!1 iy3:fi 110 N ;40
''i , 1:4 „i f,. „„ Rooftop Installation
• 30” : = i i); H liii 30”
; ,, i ., , , „, Rooftop platform requirements:
' "'i <5 80-00-01 A • The unit MUST be situated to provide safe access for serv-
Internal Filter Access icing.
(C Chassis Units) Burner Panel Compartment • The existing roof structure MUST be adequate to support
the weight of the unit or the roof MUST be reinforced.
Check the weight of the unit in relation to the roof structure
and local building codes or ordinances and reinforce roof
Minimum Clearances to Combustible Construction structure if necessary. See FIGURE 25 on the back cover
Furnace Plenum 2" of this manual for unit weights and corner weights.
Duct Side 2” (6" on large chassis models) • Support for the unit MUST be level and strong enough to
carry unit weight. The support may consist of a platform or a
Condenser Inlet Side 30" combination of platform and roof beams or curb.
Blower Service (Rear) 30" The platform may be constructed of pressure treated wood
Control Service Side (Front Combustion Air Inlet) 30" and may be covered with Class A, B or C roof covering.
Clearance between 3 Ft. Overhang and Top of Unit 30" • Platform MUST allow for proper condensate trap installa-
Combustible Base (Wood or Class A, B or C tion and drainage. See FIGURE 6 and associated text for
more information about condensate drainage.
roof covering material) 0" •
NOTE: Cardboard covers on downflow supply and return duct
Installation openings MUST be removed before starting unit.
Hoisting
CAUTION NOTE: All access panels MUST be secured in place before hoist -
Unit will NOT operate properly unless it is installed level front ing.
to rear and side to side. The unit should be hoisted with two lifting slings. Attach the slings
to rigging shackles that have been hooked through holes in the
The slope MUST NOT be greater than 1 /8" per foot (10mm per base rail.
meter). For side to side leveling, the control box side MUST Two spreader bars MUST be placed on top of the unit to protect 4
always be lower. the unit from damage from the pressure exerted by the slings.
Make sure that all equipment is adequate to handle the weight of
the unit and that the slings will not allow the unit to shift.
Ground Level Installation
Refer to FIGURE 25 on the back cover of this manual for illus-
Ground level platform requirements: trated rigging instructions and weight chart.
•
6
L Combination Units Installation Instructions
Downflow Conversion ;i FIGURE '5 Heating Vent Assembly
These units are adaptable to downflow use. To convert to down-
flow use, follow these steps:
Flue Support
1. Remove the blockoff plates found in the return air compart- (Shipped mounted to unit)
ment and the supply air compartment. See FIGURE 4 for
plate location.
/ °
Flue Cover
NOTE: Blockoff plate in the supply air compartment only contains
one screw. If reinstalling plate, back part of plate MUST fit into ° 1
mating dimples on flange. To reinstall, slant plate into dimples, 0 °1
then put plate into position and fasten with screw. o N .
2. Install the removed plates on the horizontal return and sup-
ply air openings. - r
3. Install roof curb on your building. Be sure to follow all direc- 0 0
tions included with curb and all applicable building codes. .
4. Install unit on the appropriate roof curb.
NOTE: It is the installer's personal responsibility to follow all local Condensate Drain
codes and ordinances and instructions contained herein, as well
as instructions included with accessory items when installing unit. A 3 /4" 0.D. condensate drain connection is located at the front end
of the unit. A 3 /4' drain line MUST be installed if required by local
codes or location of unit, and run to an open drain or other suitable
disposal point. A condensate trap MUST be installed as near
F IGURE 4 Blockoff Plate (Return Air Compartment) the unit as possible for proper drainage.
f.. 1 , 4,Viat.��, ± : . °� '� X '' + Condensate Trap
"; Screws for " Z Screw for
B Chassis C Chassis k ,.7 Condensate trap MUST have proper height and fall as shown in
F71417::::', S- i� X4 - 7 FIGURE 6.
1 ',r Fly FIGURE 6 Condensate Trap
4 2 , i Sav i - f ' � : 1 f t a g
V � % 25-1/2 ( "B" Chassis)
32-1/4 "C" Chassis)
- y' g 0° st
3/ " (19.1mm)
Threaded Female
1 PVC Fitting
,i ss
fib (25.4mm)
f,." ® r v\
Heating Vent Assembly 41/2 v !• I �
• y I � /
2" (50.8mm)
The flue cover is packed with screws in the return air compart- '
ment. Refer to FIGURE 5 and assemble as shown. 3 / 4 " (19.1mm)
Drain Line
CAUTION
80 -30-27
DO NOT OPERATE THE UNIT WITHOUT THE VENT AS- * Condensate trap MUST be installed.
SEMBLY INSTALLED
all
I I Installation Instructions Combination Units j
4. Gas Supply and Piping
Because there are many types of liquefied petroleum (LP) gases, Manifold Pressures
the term LP as used in this manual refers to propane gas. If you
intend to use any type of LP gas, proper precautions MUST be Manifold pressures are covered in the startup procedure section.
used in the handling, piping, and use of such gas. NOTE: In Cana- Refer to Chapter 8. Start —Up Procedures on Page 13.
da, LP installations MUST be performed by licensed LP installers.
The Rating Plate located on the side panel on the unit contains the Gas Piping
model number, type of gas and gas input rating, and other impor The gas supply line MUST be of adequate size to handle the Btu/
tant information. hr requirements and length of the run for the unit being installed.
Determine the minimum pipe size for natural gas from the table in
VVAFS,V • JIM NO TAG or NO TAG. Base the length of the run from the gas me-
ter or source to the unit.
Fire and /or explosion hazard.
Gas Pipe Size
Make certain the unit is equipped to operate on the type Btu ratings of all other gas appliances MUST be considered for
of gas available. Models designated as natural gas are sizing of main gas line. Check gas line to installation for com-
to be used with natural gas only. Models designated for pliance with local codes or, in the absence of local codes, with the
use with liquefied petroleum (LP) gas are shipped with National Fuel Gas Code ANSI Z223.1 -1990 and in Canada the
orifices sized for commercially pure propane gas. They
National Standard CAN /CGA B149.1 current editions.
MUST not be used with butane or a mixture of butane
and propane unless properly sized orifices are installed FIGURE 8 _ Gas Pipe Size, Length and Btu/hr Capacity for
Schedule 40 Iron Pipe (English)
by a licensed LP installer. NATURAL GAS
Failure to follow this warning can result in property P( In Length Btu/hr (in thousands)
(Includes
damage, personal injury, and /or death. Fittings) 3/4" 1" 1 1 2"
20' 190 350 730 1,100 2,100
40' 130 245 500 760 1,450
Gas Pressures 60' 105 195 400 610 1,150
1. Do NOT allow minimum gas supply pressure to fall below LP GAS
the minimums. Doing so will decrease input to furnace. Re
Pipe Length
fer to FIGURE 7 for gas supply pressures. (Includes Btu/hr (in thousands)
Fittings) 1/ 3/4% 1 ., 11/ 1 1 /2 ,
2. Gas input MUST NOT exceed rated input shown on rating 20' 189 393 732 1,496 2,299
plate.
40' 129 267 504 1,039 1,559
3. Do NOT allow pressures to exceed the maximum limits as 60' 103 217 409 834 1,275
listed in FIGURE 7. .
NOTE: If gas supply pressures are not correct, contact your gas Gas Pipe Size, Length and Btu/hr Capacity for
supplier. FIGURE 9 Schedule 40 Iron Pipe (English)
NATURAL GAS
FIGURE ,7 '- Gas Pressures Pipe Length kW ** A
(Includes
Fittings) 3 /4" 1" 1 1 2"
Natural Gas LP Gas 6.1m 56 103 214 322 615
12.2m 38 72 147 223 425
Minimum 18.3m 31 57 117 179 337
Inlet 4.5 "W.C. (1120 Pa) 11" W.C. (2740 Pa) LP GAS
Pressure
Recom. Pipe Length kW **
Inlet 7 - W.C. (1740 Pa) 11 W.C. (2740 Pa) (Includes 1 3 1 1
Pressure
Fittings) /2" /4 1" 1 /4° 1 /2'
Maximum 6.1m 55 115 215 438 674
Inlet 13" W.C. (3230 Pa) 13 W.C. (3230 Pa) 12.2m 38 78 148 305 457
Pressure 18.3m 30 64 120 244 374
Manifold 3.5" W.C. (870 Pa) 10" W.C. (2490 Pa) * *kW (Kilowatts) is the metric equivalent of Btu /hr.
Pressure
8
[Combination Units Installation Instructions
5. Disconnect the wires from the gas valve. 1
FIGURE ,.,,';'°,:`‘', 10 Orifice Sizes
6. Disconnect the pilot tubing from the gas valve.
Gas Specific Btu /ft 3 Orif ice Main Orifice Sizes 7 Remove the four screws holding the manifold to the man - Pilot
Type Gravity (kJ /�) Sizes 0 to 2,000 to
ifold brackets.
2,000 Ft. 4,500 Ft.
8. Carefully remove the manifold with the gas valve attached.
43 ** 44 **
Natural 0.6 1000 .018# 9. Remove the orifices from the manifold with a 7 / 1 6" box end
44* 45* or socket wrench.
Propane 1.53 2500 .012# 54** 55** 10. Check to be sure that the size of each orifice is correct for
55* 56* the Btu input desired.
*For inputs between 40,000 and 60,000 BTUH
* *For inputs between 90,000 and 150,000 BTUH
#Adjust pilot flame as needed FIGURE='11 ; Manifold/Orifice Measurement
Measure 11 /16"
(27mm) from face
Orifices of orifice to back
`'d edge of manifold
Orifice Sizes pipe. •
Orifice sizes MUST be matched to the heating value of the gas • ��
(see FIGURE 10). Check with your gas supplier and the National ..
Fuel Gas Code ANSI Z223.1 -1990 and in Canada the National
Standard CAN /CGA B149.1; current edition.
NOTE: An LP Conversion Kit, which contains pilot and burner ori-
fices, a two —stage LP gas valve and an instruction manual, MUST 11. Install the correct orifices. Gauge the size of the orifices
be used for conversion to LP gas. In Canada, gas conversions with a new twist drill bit of the correct size.
MUST be made by an authorized conversion station.
Make sure that the orifices go in straight so that they form a
NOTE: For elevations above 2000 feet (610 meters), the Btu input right angle (90 °) to the manifold pipe.
rating MUST be reduced by 4% for each 1000 feet (305 meters)
above sea level, unless the gas supplier's Btu /ft content has al- Tighten the orifices so that there is a 11 /16' (27mm) dis-
ready been adjusted for altitude. Check with your gas supplier for tance between the faces of the orifices to the back of the
the proper orifice sizes and consult the Technical Support Manual manifold pipe.
for the proper orifice part numbers.
Measure the distance with a set of calipers. If you do not
Changing Orifices have a calipers, you can use an adjustable wrench and
measure between the face of the jaws.
Wink WrItIV . INI IM 12. Reassemble in reverse order.
Electrical shock, fire and/or explosion hazard.
Piping at Unit
Shut off electric power at unit disconnect or service
panel and shut off gas at manual shut off valve before Connections
beginning the following procedure. NOTE: Refer to FIGURE 13 for the general layout at the furnace.
i The rules listed apply to natural and LP gas pipe installations.
Changing orifices requires a qualified service techni-
cian. 1. If installation is for LP gas, have LP gas installer use TWO —
STAGE REGULATION and make all connections from
Failure to follow this warning can result in property storage tank to unit.
damage, personal injury, and /or death. 2. Use black iron or steel pipe and fittings or other pipe a
proved by local code.
NOTE: If a flexible gas connector is used, it MUST be acceptable
to local authority. Connector MUST NOT be used inside the fur -
1. Shut OFF gas at manual shut off valve. nace or be secured or supported by the furnace or ductwork. Con-
nectors MUST comply with one of the following standards or a
2. Shut OFF electric power at unit disconnect or service pan- superseding standard:
el. • ANSI Z21.24a -1983, Metal Connectors for
Gas Appliances.
3. Remove the burner access panel. • ANSI Z21.45b -1983, Flexible Connectors of
Other Than All —Metal Construction for Gas
4. Disconnect the gas line from the gas valve. Appliances.
• 91
I I Installation Instructions Combination Units J
WARN ■ N 6 • Leak Check
1. Gas pressure MUST NOT exceed 1 /2 PSIG (3450 Pa).
Fire and/or explosion hazard. Checking gas piping above 1 /2 PSIG (3450 Pa) requires
the gas valve and manual shutoff valve to be disconnected
Gas connector MUST be properly installed and can NOT be during testing.
used inside the furnace.
2. When checking gas piping to furnace, shut OFF manual
Failure to do so can result in property damage, bodily inju- shutoff valve to furnace.
ry or death.
3. Test all pipes for leaks.
WARN■NI
3. Use pipe joint compound on external (male) threads ONLY.
Joint compound MUST be resistant to any chemical action Fire and /or explosion hazard.
of LP gases (FIGURE 12).
4. Use ground joint unions and install a drip leg no less than 3 Never exceed specified pressures. Higher pressures
inches (76 mm) long to trap dirt and moisture before it can may damage the gas valve. Such damage may result in
enter gas valve. overfiring and possible heat exchanger failure.
5. Use a flat jawed wrench on gas valve when making con -
nections to prevent gas valve from turning. Do NOT use a Do NOT use a match or open flame to test for leaks.
pipe wrench on the gas valve body.
Failure to follow this warning can result in property
CAUTION damage, personal injury, and /or death.
Overtightening assembly may cause damage to the gas
valve and /or wiring and may misalign the burners. 4. Apply soap suds (or a liquid detergent) to each joint.
6. Provide a 1 /8 inch (3mm) National Pipe Thread (NPT) plug Bubbles forming indicate a leak.
for test gauge connection immediately upstream of the gas 5. Make sure pilot tube and burner orifices are checked for
supply connection to the furnace. leakage.
6. Correct even the smallest leak at once.
FIGURE 12 ° Proper Piping Practice
FIGURE 13 Piping at Unit for Natural Gas
Control
Use moderate
amount of compound
If' lrrrr,
Manual Shutoff
1111.1!!!II j jjjj1jj i
r Valve
Leave 2 end w� Thread pipe right length threads bare i
. e , % \
7. Install a manual shutoff valve and tighten all joints securely. OA i
i a
LP Connection Requirements Gas Valve U \
1. Have a licensed LP gas dealer make all connections at Drip Leg
0 storage tank and check all connections from tank to fur- 0
nave. • e
iv
2. If copper tubing is used, it MUST comply with limitation set
in National Fuel Gas Code or in Canada the National Stan- '
dard CAN /CGA B149.1; current edition..
3. Two —stage regulation of LP gas is required. 80-30-09
10
i
Combination Units Installation Instructions
1 I
5. Electrical Wiring
vvA �, V ., V The location of the thermostat has an important effect on the op
eration of the unit. FOLLOW THE INSTRUCTIONS INCLUDED
WITH THE THERMOSTAT FOR CORRECT LOCATION,
Electrical shock hazard. MOUNTING, AND WIRING.
Heat Anticipator
Disconnect power at fuse box or service panel before
making any electrical connections. Set the thermostat heat anticipator to .58 in accordance with ther
Unit MUST be grounded to electrical service panel. mostat instructions.
i
Failure to follow this warning can result in property Line Voltage Wiring
damage, personal injury, and /or death. Connections for line voltage are made in the unit control box. For,
access, remove the burner access panel and the control box cov l
er.
Do NOT complete line voltage connections until unit is permal
nently grounded. All line voltage connections and the ground con;
NOTE: All electrical work MUST conform with the requirements of nection MUST be made with copper wire.
local codes and ordinances and the National Electrical Code
ANSI /NFPA —No. 70 -1990 or current edition. Provide line voltage Ground Connections
power supply from a separate protected circuit with a disconnect
switch (when required) located within sight of the unit. Supply volt- A ground lug is installed in the control box for the ground connect
age, a wir fuse and disconnect switch sizes MUST • t ion. Use a copper conductor of the appropriate size from the unit
conform with specifications in the Technical Support Manual and to a grounded connection in the electrical service panel.
with unit rating plate.
i
All exposed wiring or connections MUST be made with weather- Line Connections
proof cable or wire unless installed in conduit. Wiring MUST be 1
protected from possible mechanical damage. Complete the line service connections to the contactor `L' termi
nals inside the control box. Refer to applicable wiring diagram in
Connections for line voltage are made in the unit control box. Low Technical Support Manual. Check all screw terminals to ensure
voltage connections are made outside the control box. For ac- they are tight.
cess, remove the burner access panel and the control box cover.
See FIGURE 2. Field Installed Equipment
I
Low Voltage Wiring i
9 9 Wiring to be done in the field between the unit and devices not at-
Lowvoltagewiringconnectionsforthethermostataremadeatthe tached to the unit, or between separate devices which are field
24V terminal board outside the control box. Refer to the wiring dia installed and located, shall conform with the temperature limita-
gram for the applicable model and the instructions included with
instructions applicable to such devices.
Thermostat Final Electrical Check
NOTE: Do NOT attempt to use a thermostat designed for Make a final wiring check to be sure system is correctly wired. In-
electric heat or heat pump use. Such thermostats will NOT spectfield installed wiring and the routing to ensure that rubbing or
control the unit properly. chafing due to vibration will not occur. 1
1
6. Ductwork
Maximum recommended velocity in trunk ducts is 1000 feet per tected against damage. Caulking and flashings, or other means
minute. Velocity in branches should not exceed 800 feet per min- adequate to provide a permanent weather seal, should be used.
ute.
i
Ductwork installed in attics or other areas exposed to outside tern-
NOTE: Ductwork sizing affects temperature rise and cooling tem peratures should be installed with a minimum of 2" Fiberglas in
perature differential. Be sure to properly size ductwork to the ca sulation and have an indoor type vapor barrier.
pacity and airflow characteristics of your unit. Failure to do so can Ductwork Connections
affect limit controls, compressors, motors, and other components
and will lead to premature failure of components. This will also The use of flexible, non — combustible connectors between main
adversely affect day to day unit performance. Refer to rating plate trunk ducts and supply and return air plenums is recommended to
and Temperature Rise Check section in this manual.
minimize vibration transmission .
Ductwork Insulation
NOTE: Connect supply and return air plenums to unit in a manner
that will allow the top of the unit to be removed without removing
Ductwork installed outdoors should have a minimum of 2" Fiberg- plenums. Plenums MUST be individually sealed to unit casing
las insulation and a weatherproof vapor barrier. It should be pro- with ducts terminating inside structure.
III
I I Installation Instructions Combination Units
Filters cessories are used. Mimimum recommended filter areas are
based on a velocity of 300 ft/min for disposable filters and 500 ft/
All return air, including economizer air and outside damper air, min for high velocity filters (washable).
MUST pass through a filter before entering the evaporator. An CAUTION
electronic air cleaner or other accessible filter arrangement
MUST be installed in the return air ductwork. This can ONLY be
done when the internal filters are removed and NO outdoor air ac- DO NOT OPERATE THE UNIT WITHOUT A FILTER.
7. Economizer
The purpose of an economizer is to: The economizer is controlled by a logic module which field con
• Provide cool outside air to the conditioned space during the ne the unit
cooling cycle to minimize the use of the compressors. ule also ctsl to controls the compressor controls through a plug harness. The logic mod -
staging based on the thermostat
input.
• Bring outside air into the conditioned space to meet mini- The minimum opening position of the fresh air dampers is field
mum fresh air requirements whenever the circulation blow- settable. It is set on the logic module of modulating economizers
er is running. or on the actuator motor of three — position economizers.
The enthalpy sensor is factory installed on the fresh air dampers
of the economizer. The enthalpy change —over point is adjustable
FIE'14 Downflow Economizer on the logic module.
GUR
it g � g ,.. � � A discharge air sensor is field installed in the blower inlet. The dis-
Y . :� .fie charge air sensor keeps the discharge air above 56 °F (13.3 °C).
�, ® �, Y Fresh Air x .
- -, „�_ r A positive pressure is created when the fresh air dampers open
Dampers P P P P
� �& i � � ����� ��� � ® ('1 214,0'''X � en
and the return dampers close. This pressure must be vented or
, - ��
the air will not circulate properly. This is the function of the baro-
�, � � '' .' � metric relief dampers. A positive pressure forces the passive ex
$ a .(4 g �� V haust dampers to swing open.
r • 1, 4, , , _ „ The w the circ ers open to ulation blower is minimum position for outside air
whenever he circer is O
Plu Harness v �' ' Po
9 � y � � ��� �� - When the thermostat is in the FAN AUTO position, the fresh air
�, E ,� � ., ;.�,-, dampers will close completely whenever heating or cooling is not
i� i tz "� 4, 11�� -" * .0 °t c alled for.
E : e When the thermostat is in the FAN ON position:
aPo s
� � :. � , 1. The fresh air dampers will open to the minimum position for
I ii ,.. ,, . 3'' s m f ”, Ax fresh air.
: ; 1 , R et u rn A ir I f Us a 2 — Stage Thermostat
. " , Dampers " , 2. On a call for cooling, if the economizer outdoor air sensor
�� i" - determines that the outside air is cool enough (and in the
. ti 0 � 4. 1 case of an enthalpy sensor, dry enough), the fresh air
f x t dampers will modulate open and the return air dampers will
' �� , modulate closed.
," *� ¢ If the conditioned space is not being maintained at the se-
#' %' lected temperature, the thermostat will make Y2 and call for
tit; , s econd stage cooling by energizing the economizer to
E���� � ` �� � 9 9 Y 9 9 is o. 9
module at low voltage terminal board terminal Y4. This en-
:� ergizes the Y1 anti —cycle delay and contactor which ener
-,,,z: : ::,4:, .§ . ., ,i� z �„ i r k t , r • , , gizes the condenser fan and compressor for cooling to „;.;.,, 4:
t - ,' ` ' . � � F ® '$ assist the economizer.
If Using a Single — Stage Thermostat
When using a single stage thermostat, all steps as outlined above
Theory of Operation will be followed with the exception of the following:
The economizer has two sets of dampers that are mechanically The compressor will only be energized when the outside air
linked together. The fresh air dampers regulate the intake of out- reaches a temperature above the preset limit of the economizer.
side air and the return air dampers regulate the flow of return air When ambient conditions are not suitable for economizer opera -
(see FIGURE 14). When the fresh air dampers modulate open, tion, ONLY the compressor will run, and the economizer will NOT
the linkage causes the return air dampers to modulate closed. be energized.
liili
[Combination Units Installation Instructions
8. Start —up Procedures
WARN ■ N IM Manifold Pressure Settings
Fire and /or explosion hazard. Gas Type Manifold Pressure
Do NOT attempt to light the pilot or burner with a match Natural 3.5 Inches Water Column (870 Pa)
or flame of any kind.
Propane 10 Inches Water Column (2490 Pa)
Failure to follow this warning can result in property 2. Turn gas ON and remove adjustment screw cover on gas
damage, personal injury, and/or death. valve. Turn counterclockwise to decrease pressure and
clockwise to increase.
NOTE: Adjustment screw cover MUST be placed on gas valve
before reading manifold pressure and operating furnace.
3. Set pressure to value shown in FIGURE 15, ± 0.07kPa (0.3
Check Before Starting inches) water column. Pressure is also listed on furnace
rating plate. In NO case should final manifold pressure vary
1. Check that the blower motor speed terminal block isset for more than ± 0.07kPa (0.3 inches) water column.
the correct heating and cooling speeds. Refer to the unit
wiring diagram and tech sheet label and /or Technical In- Circulating Air Blower
formation Manual.
Check the unit's operation as outlined in the following instructions.
If any unusual sparking, odors or unusual noises are encoun-
2. Check to see that clean, properly sized air filters are tered, shut off electric power immediately. Recheck for wiring er-
installed . rors, or obstructions in or near blower motors.
3. Replace all service access panels. NOTE: If spark wire is removed or replaced, always be certain to
remount wire on support bracket standoff.
1. Set thermostat Heat -Cool selector to OFF.
Reverse Rotation (Scroll
Compressors Only) 2. Set thermostat fan switch to AUTO.
3. Turn electric power ON. Nothing should start running.
Three phase scroll compressor equipped units CAN run in re-
verse if improperly wired. If the compressor makes an unusually 4. Turn manual gas valve ON.
loud noise, or if high and low side pressures are nearly identical, 5. Turn gas control valve ON.
this indicates reverse rotation. To correct, reverse any two wires
at line voltage connections ONLY. Do NOT rewire any circuits in- 6. Set thermostat fan switch to ON. After 30 seconds, the cir-
side the unit to attempt correction of reverse rotation. culating air blower should come ON.
Manifold Gas Pressure Adjustment 7. Reset thermostat fan switch to AUTO. After 30 seconds,
NOTE: Make adjustment to manifold pressure with burners oper- the circulating air blower should go OFF. Nothing should be
ating. running.
VVA Heating
1. Adjust thermostat setting above room temperature and set
Fire or explosion hazard. thermostat selector to HEAT. The combustion air blower
Turn OFF gas at shut off before connecting U - tube ma should come ON.
nometer. 2. The ignitor should begin to glow and pilot flame should light.
Do NOT adjust manifold pressure more than ± 0.3 inches NOTE: On a call for heat the ignitor and pilot valve will remain en-
water column to obtain rated input. ergized until a flame is detected by the flame sensor. It may take
Failure to properly set input pressure can result in proper several minutes to purge the air out of the gas lines at initial start-
ty damage, personal injury and/or death. up of the unit.
3. Once the flame sensor detects that a flame is present, the
hot surface ignitor will de- energize and the main burners
will light from the pilot.
1. With gas OFF, Connect U -Tube manometer to tapped
opening on gas valve. Use manometer with a 0 to 12 inches 4. 30 seconds after the burners light, the circulating blower
water column range. shuld begin to run.
I I Installation Instructions Combination Units J
Temperature Rise Check NOTE: The maximum outlet air setting for all models is 175 °F.
NOTE: Air temperature rise is the temperature difference be- 4. Adjust the thermostat setting below room tempera -
tween supply and return air. With a properly designed distribution ture.
system, the proper amount of temperature rise will normally be
obtained when the unit is operating at rated input with the recom- Pilot and main burners and combustion air blower should
mended blower speed. go OFF.
2. The temperature rise must be within the specifica The circulating air blower should continue to run for 60,
tions marked on the unit rating plate. 100, 140 or 180 seconds. This time is adjustable.
To check the temperature rise through the unit, place 5. Set thermostat Heat -Cool selector to OFF.
thermometers in the supply and return air ducts as
close to the unit as possible. Cooling
Open ALL registers and duct dampers. Operate unit AT 1 • Turn electric power OFF
LEAST 15 minutes before taking readings. 2. Set thermostat Heat —Cool select to COOL.
If the correct amount of temperature rise is not obtained when op- 3. Adjust thermostat setting to below room temperature.
erating on the recommended blower speed, it may be necessary
to change the blower speed. A faster blower speed will decrease 4. Turn power ON, for approximately one minute, then OFF.
the temperature rise. A slower blower speed will increase the tem- During power application check the following:
perature rise. a. Contactor — Contacts Closing
NOTE: The blower speed MUST be set to give the correct air tem- b. Compressor — ON
perature rise through the furnace as marked on the rating plate. c. Condenser fan motor — ON
d. Circulating Air Blower — ON after a 30
3. After 15 minutes of operation check the limit control second delay
function by blocking the return air grille(s).
5. Turn power OFF, check the following:
After several minutes the main burners and pilot should go a. Contactor contacts opening.
OFF. The circulating air blower should continue to run. b. Compressor — OFF
c. Condenser fan motor — OFF
Remove air restrictions. Pilot and main burners should d. Circulating blower — OFF after a 30 second
relight after a cool down period of a few minutes. delay.
9. Operation
WA ■�V ■ N event of a power interruption. This feature is to allow pressure
equalization throughout the system and to prevent possible re-
verse rotation of the scroll compressor. Three phase units do not
Electrical shock hazard.
require this device.
High and Low Pressure Switches (Not All Models)
Turn off electric power supply at disconnect switch or
service panel before removing any access or service High and low pressure switches are provided on these units which
panel from unit. will shut down the system when high pressures exceed 420 psi
and low system pressures fall below 27 psi. The switches auto-
matically reset after a fault. They are accessed through the com-
Failure to follow this warning can result in property pressor compartment access panel.
damage, personal injury, and/or death.
Fan Cycle Pressure Switch Port (optional)
If your unit will be operated in low ambient conditions (below 40°
F) and you elect to install a low ambient fan cycle control, you can
find the low ambient pressure port located on the discharge line
Controls and Features just inside the compressor compartment panel opening.
Cooling Time Delay Relay (Not All Models) Freeze Protection Thermostat (Not All Models)
A cooling time delay relay is used on the evaporator blower motor The freeze protection thermostat is located on the evaporator coil
to increase efficiency (SEER). On a call for cooling, the blower bends on the burner side of the unit. It is designed to shut down the
motor starting is delayed for 30 seconds. Also, after the thermo- cooling circuit if the evaporator coil temperaturefalls below 35° F.
stat is satisfied, the blower motor continues to run for 30 seconds
after the condenser fan motor and compressor have shut off. Filter Drier
Scroll Anti — cycle Timer (Not All Models) A liquid line filter drier is located inside the compressor compart-
ment access panel opening. Be certain to replace filter driers with
Single phase scroll compressor equipped units are equipped with the correct size and type as found in the Technical Data Sheets
an anti —cycle device which delays start of the compressor in the available from your dealer.
14
Combination Units Installation Instructions 1
Economizer Plug may run continuously for several hours or longer on the initial run
because of residual heat and moisture in the house. This is nor -
A pre —wired economizer plug is located just inside the return air mal for any air conditioning system.
opening. See Page 12 for more information about the economiz- CAUTION
er.
Starting the Unit After Shutdown Do not operate on cooling when outdoor temperature is be-
low 40 °F. This is necessary to prevent possible damage to
Heating the compressor.
1. Set thermostat to OFF.
Turning The Unit Off
2. Remove burner compartment access panel. Locate gas
control valve knob (NO TAG), and turn to OFF. Wait 5 min- 1. Set the thermostat switch and OFF fan switch to AUTO. To
utes. restart, set to HEAT or COOL and temperature desired.
3. Turn gas control knob to ON. (Honeywell valve must be de- 2. To shut the unit down completely, turn electric power OFF.
pressed to turn). Replace burner compartment access Turn manual gas valve off.
panel. Turn manual gas valve to supply pipe ON.
4. Turn electric power ON. CAUTION
5. Set thermostat to HEAT and to desired temperature. Unit To prevent heat exchanger damage, wait at least 2 minutes
will come on and operate automatically under control of the after blower stops before shutting off power to unit.
thermostat. Never attempt to light the pilot manually.
NOTE: If the furnace overheats or fails to shut off, turn OFF the
manual gas valve for the furnace then wait at least 2 minutes be-
fore turning off electric power.
WA RN ■IV1
Thermostat Fan Switch Operation
Flre and /or explosion hazard
With the selector switch in the ON position the circulating air blow -
Do not operate the unit on heating (except during ser- er will run continuously (after the 30 second delay) at the speed
vice checks) unless all access panels are securely fas- used for cooling. In the AUTO position the blower will only be on
tened in place. Abnormal and possibly hazardous during each heating or cooling cycle.
burner operation could result. CAUTION
Failure to follow this warning can result in property Some units use a lower blower speed for cooling than for
damage, personal injury, and/or death. heating. Do NOT position selector switch to ON for continu-
ous operation during heating cycle if the cooling blower
speed is lower than the heating speed. Blower speeds for
each model are listed on the units Tech Label.
Adjusting Room Temperatures
Cooling If the temperature in individual rooms is not as desired, balance
g the system by adjusting the dampers in the branch ducts. Adjust a
little at a time and wait a day after each change to judge the effect.
Set thermostat to desired temperature and set system switch to Once the dampers are adjusted for normal weather conditions, it
COOL. The unit will come on and operate automatically under is best to leave them that way. Compensate for temporary weath-
control of the thermostat. Close all doors and windows. The unit er changes by adjusting the thermostat setting .
10. Maintenance
Monthly Maintenance and Inspection Inspect filters at least monthly and replace or clean as required.
Checks Washable filters may be cleaned by soaking in mild detergent and
rinsing with cold water. Replace filters with the arrows on the side
Air Filters pointing in the direction of air flow. Dirty filters are the most com-
CAUTION mon cause of inadequate heating or cooling performance, and of
Do NOT operate without air filters. compressor failures.
Combination Units j
1 Installation Instructions
Refer to FIGURE 19 to illustrate location of filter racks and filter Refrigeration Access Ports
access panel. Filters should be removed and replaced through
this access panel. This unit is equipped with refrigeration access ports mounted on
the side of the unit. Refer to FI GURE 18 for identification of ports.
Heating Season Checks (Monthly)
EIGURE18 3 Typical Access Ports
Pilot Flame
� � 7
,,
- 16 Pilot Assembly High Side . .
0,2.1*,,,,,,,I'‘,4,7,.. � Flame Sensor 5
t, , � t i :tom - g '� p to F ,io "' ,: .u : - --- � � x • 4" xis �` �
�, l � � ii Pil Burner 1 ,,., ,..,,,,,,,,:.,...,...
z Ignitor '- t - -7 �' ,, ' ,fi x '. a • f ' .'.
t;;rr:t*:;:,lihrir * '''a 1 ' , , 1 ' -. ' •gtlf'',qt,t-i:-,tkA,,v-wi,gr,„,„ ,. Low Side • j x a �� t 4- i ov w ' t � 1 r: e g g Y < d
-. f � fl n � g a - � 4, f a : ,
���� �� A . 3�9i'k i $ H*�'k Z i�Yik • ��, Y� a � ;�+ �� �3. � .
A -„ eta 1,, i 4. , 's '`'
�.£����; k �� ��� FI GURE 19
Access to Built —In Filters
�� $t y t "� '77� � � A (Except B Chassis)
,, � �� f�t�s�� �'`� � ��� « ' � �' ' ��
While the main burner is on, the flame should envelop the upper { ,,� ,, ,,,
part of the flame sensor, as shown in FIGURE 16. �$
Main Burner Flame 2 .'; a5 " -- ;,z:... , 5 ,°, "-, � ' �
Flames shou be stable and solid blue, (dust may cause orang
tips or they may have wisps of yellow, but they MUST not have �� " ' �
solid yellow tips). They should extend directly into t heat ex r }a
changer tubes and the turbulators should glow orange (after g
about five minutes of operation). Main burner flame should be in ,,
s monthly.
No Flame
FIGURE 1 7
Vent Assembly
Flame should be
Turbulator will glow stable and solid WARMini �
orange when hot. blue.
Burn hazard.
Ilk \ Flue cover may be hot! Allow adequate time for flue
cover to cool.
Failure to follow this warning can result in property
— damage or personal injury.
c,
e l
.. ....„,..0
Using a and light the and inlet mirror air op (as req inspet tf ve ening in ti burner c compartment. he inside o Look the for nt
hood
16
[Combination Units Installation Instructions
soot and severe rust or corrosion and any obstructions due to 2. Remove the four screws securing the blower motor hous-
leaves, spider webs, etc. Clean as required. ing. If unit has a support bracket, remove the two screws
securing the bracket.
Cooling Season Checks (Monthly)
3. Remove the two red wires attached to the limit switch.
Condenser Coil 4. Slide entire housing toward you. This will allow easier ac-
Keep the condenser inlet and outlet area clean and free of leaves, cess to the speed tap block, motor, and wires.
grass clippings or other debris. Grass should be kept short in front 5. After access, replace all wires, screws, and connections.
of the condenser inlet. Shrubbery MUST be trimmed back so it is
no closer than 30 inches to unit.
Motor removal and replacement
Condensate Drain The blower motor may be replaced while accessing it using meth -
Check for condensate drainage. Clean as required. od 1. To replace motor, reach behind blower housing and locate
1 blower wheel set nut. Loosen set nut, all wires from motor, and
NOTE: When unit is operating in cooling mode under high humid- four pins on mounting cradle. Pull motor towards you. To replace
ity ambient conditions, condensate can form in the burner motor, reverse this procedure.
compartment and may drip from front of the compartment. This Method 2
condition is NOT harmful to unit.
This method is required to replace or repair blower wheel, blower
Annual Maintenance and Inspection housing, or any unreachable components behind blower assem-
bly.
1. Repeat steps 1 through 4 in method 1.
WA FS n11 N 2. Remove all screws around rim of unit top, (except screws
which are inaccessible because of proximity to structure).
Electrical shock hazard. 3. Raise unit top at corner of unit closest to blower at least 2"
and place a sturdy brace at least 2" thick between top and
Turn off electric power supply at disconnect switch or unit corner. See FIGURE 20. A 2X4 piece of wood is ideal
service panel before removing any access or service for this.
panel from unit. 4. Disconnect all wires from housing and slide housing out of
unit. Reverse this process to reinstall.
Failure to follow this warning can result in property
damage, personal injury, and/or death. Blower Access Showing Lid
FIGURE 20 ; V Propped with 2X4
y 3i b9 '' Ig'>"�°�'4
The annual inspection should include lubrication and cleaning as
required to ensure efficient operation of the unit. To simplify ac
cess, remove all access panels and the top from the unit if pos- 3, p ,
sible .� � �
Condenser Fan Motor
Oil the condenser fan motor after five years of operation and every
X541 '
five years thereafter. - '
go `�
Use SAE 10W30 motor oil. To oil, remove the hole plugs from the
motor end bells and add several drops (approximately 1/2 tea-
spoonful) of oil with a squeeze type, flexible tube oiler. Replace
hole plugs after oiling. Do not over oil.��:
Clean the surrounding area and the condenser and evaporator
coils. Use caution to avoid damage to coil fins.
Blower Motor Access Speed Taps
After determing necessary CFM and speed tap data on from tech
Refer to NO TAG for a view of blower motor and compartment. data label on the unit or in the Technical Information Manua /follow
Method 1 the steps below to change speeds.
1. Refer to FIGURE 21 below and locate the speed tap block
This method allows you to work on the motor and housing while on blower motor.
still in the unit. The blower motor can be replaced with this method, 2. The yellow lead MUST always be connected to the speed
but some may prefer to work on the housing assembly separately. tap block at the common quick connect terminal. The termi-
If this is your preference, use method 2. nal is identified as COM. Also, this is the only lead which is
1. Remove the blower access panel 3 /16" wide. All other quick connects are 1 / 4 " wide.
Combination Units j
II Installation Instructions
3. If it has been determined that cooling and heating speeds fated male terminal on the black cooling lead. Then place
are needed on the same speed tap, remove the red heating the insulated black female quick connect to the required
lead from the speed tap block and connect it to the insu- speed tap.
FIGURE 21 Blower Motor Speed Taps (3 —Speed and 4 —Speed Motors)
'''.?. , 1,:t9,'"'I ::: , ,,,l, „, , ,:, : :', il.,„": .c.>%k k - ., 3 -SPEED MOTOR
m , .€ a
COM
3 ,r k A
,
HI
, q, F -,: ° _ P , - MOTOR ,ztv,i2 $"
1 3 4h a BLACK MED
a ..ai. i- ',#4,, ,,,,,zi:k.,,,,,,,N. ` RE
� a`'� '�g� : i f s . � l
� i
w
3 i fry AL , Z s ,
Vi ,r,�, ..., -' :‘,., `s• — _ -- .,•'
4 -SPEED MOTOR
YELL
COM
_ BLACK
HI
11.1 MEDHI MOTOR
BE SURE TO CHECK BLOWER MOTOR BLACK
SPEED DATA ON UNITS TECH LABEL MEDLO
RED LO
Circulating Air Blower CAUTION
Do not use 3i in 1 oil, penetrating oil, WD40 or similar oils to oil
Visually inspect the blower wheel for accumulations of dirt or lint. motor bearings.
Clean the compartment and the blower wheel. If accumulation is
excessive on blower wheel, or does not easily remove, it will be Burners / Heat Exchangers / Flue Gas Passages
necessary to remove the blower assembly. To inspect the burners, heat exchanger and interior flue gas pas-
sages, use a light and small mirror on an extension handle.
Oil the blower motor by adding 1 /2 teaspoonful (1 cc) of SAE Check the exterior of the heat exchanger and the interiorflue gas
I0W30 to each motor bearing. The blower motor should be oiled passages for any evidence of deterioration due to corrosion,
cracking or other causes. If signs o scaling or sooting exist, re-
after five years of operation and every five years thereafter. move the burners and clean the heat exchanger, as required.
18
[Combination Units Installation Instructions II
Inspection And Cleaning Of Burner 1
Assembly /Heat Exchangers /Flue Gas FIGURE � Access to Burners
Passages
. ,
For Qualified Service Technician Only
Ilii 4 :'.ue � � , x g - �
See FIGURE 24 for identification of parts. �� ,, °
�
Burners -.
1. Disconnect electrical power to unit. f 4 d
P t tit 2 � # R. g t ' r
l '�� '„ g i g
2. Turn OFF gas at manual shut off valve. * �
� I
3. Remove burner access panel. ,, , !; p : „ � � �-,
4. Remove the vent assembly flue cover. '� ..
�
5. Disconnect gas pipe at union. F IGURE 23 Removed Burners, Valve, and Burner Box
6. Disconnect wires from gas valve, note connections. `- , W
7. Remove screws that secure the flame shield and remove s A.': � 1 A , .',
gas control valve, manifold and burners as an assembly. 7 . 4 1 ' �� z y«
8. Remove collector box, injector plate, and restrictor plate, ,,f
including gaskets. See FIGURE 23.
- %, t , ��
y
9. Hold the burner assembly vertically and lightly tap it agains .i : : ,,
a wood block. Clean also with a stiff brush.Severe cases of Collector B ox , � .
, A . ` � �
lint clogging may require washing the burners in hot water. .44 � �rt . ,,
si r 5'
moo ��� ' ? �
10. Remove turbulators and clean with small brush. Reins ect , �
after cleaning and replace turbulators if defective.
FIGURE 24 .° Burner Assembly Removed
11. Clean flue gas passages by using small brushes and a vac-
uum cleaner. It may be necessary to fabricate hand ex — _„„„., 4
tensions for the brushes to reach the areas that require ` ,, 1 pl * Gas Valve
cleaning. Reinspect after cleaning and replace the heat ex c " ;� -, € x 3 :i'
changer if defective. x
, �� �� , �
"
12. Reinstall parts and gaskets in reverse order. On � .; ;. Burners . • �• ..•.� �
spark to pilot models check the spark gap. t/8 inch is
required between the igniter and pilot hood.
Flame Shield �� .
p. ° dx fl y` , �, .
13. Turn as on and check for leaks. ' -- �
� � Manifold � �� ������ ���
14. Install all access panels, turn power on and check for � �� �; � P lot a semb�
normal operation.
� h�� _�
19
O j -
ii '
X 13.
- .
C •
Pi, • 3
.., . y M 7
RIGGING N INSTRUCTIONS =
Ei
Z 5 .
FAILURE TO FOLLOW THESE INSTRUCTIONS y
A WARNING CAN RESULT IN PROPERTY DAMAGE, xi
es 0.
BODILY INJURY OR DEATH. 0 5 o
- ALL PANELS MUST BE IN PLACE WHEN RIGGING AND LIFTING. N
- HOOK RIGGING SHACKLES THROUGH HOLES IN BASE RAIL, AS SHOWN IN DETAIL -A. a
- USE SPREADER BARS, WHEN RIGGING, TO PREVENT UNIT DAMAGE. y
- BE SURE RIGGING AND SHACKLES ARE SUFFICIENT TO HANDLE WEIGHT LISTED BELOW.
•
i i, SPREADER BARS DETAIL-A
,,...00000 I '. HEIGHT ' s ID
LENGTH ` WIDTH
COOLING LENGTH WIDTH HEIGHT MAX. WEIGHT
CABINET CAPACITY
RANGE IN MM IN MM IN MM LB KG c
B 1.5 -3.5 TONS 48.00 1219 48.00 1219 33.00 838 450 204
d
C 3 -6.3 TONS 73.00 1854 48.00 1219 36.50 927 700 318 • o
7
c
7
W