Unitary products group PT9-UP, FC9T-UP, FL9T-UP, AHL9V UP, AHV9 UP Installation Manual
...
INSTALLATION MANUAL
HIGH EFFICIENCY
TUBULAR HEAT EXCHANGER SERIES
MODELS: PT9-UP / FC9T-UP / FL9T-UP
(Two Stage Upflow)
40 - 120 MBH INPUT
(11.7 - 35.1 KW) INPUT
LIST OF SECTIONS
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
GAS PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
ELECTRICAL POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
LIST OF FIGURES
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Thermostat Chart - AC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Thermostat Chart - HP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Accessory Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Twinning Wiring Diagram - 1H/1C Thermostat . . . . . . . . . . . . . . . . .13
Twinning Wiring Diagram - 2H/1C Thermostat . . . . . . . . . . . . . . . . .13
Twinning Wiring Diagram - 2H/2C Thermostat . . . . . . . . . . . . . . . . .13
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Home Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Termination Configuration - 1 Pipe . . . . . . . . . . . . . . . . . . . . . . . . . .17
EFFICIENCY
RATING
CERTIFIED
ISO 9001
Certified Quality
Management System
COMBUSTION AIR AND VENT SYSTEM . . . . . . . . . . . . . . . . . . . . .13
CONDENSATE PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
START-UP AND ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . .21
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Termination Configuration - 2 Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Termination Configuration - 2 Pipe Basement . . . . . . . . . . . . . . . . . .17
Double Horizontal Sealed Combustion Air and Vent Termination . . .18
Double Vertical Sealed Combustion Air and Vent Termination . . . . .18
Sealed Combustion Air Intake Connection and Vent Connection . . .18
Combustion Airflow Path Through The Furnace Casing . . . . . . . . . .18
Outside and Ambient Combustion Air . . . . . . . . . . . . . . . . . . . . . . . . .19
Attic and Crawl Space Combustion Air Termination . . . . . . . . . . . . . .20
Condensate Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Pressure Switch Tube Routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Reading Gas Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Furnace Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
LIST OF TABLES
Unit Clearances to Combustibles . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Minimum Duct Sizing For Proper Airflow . . . . . . . . . . . . . . . . . . . . . . .5
Round Duct Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Recommended Filter Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Nominal Manifold Pressure - High Fire . . . . . . . . . . . . . . . . . . . . . . . . 8
Nominal Manifold Pressure - Low Fire . . . . . . . . . . . . . . . . . . . . . . . . . 8
Electrical and Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Maximum Equivalent Pipe Length . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Equivalent Length of Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Elbow Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
SECTION I: SAFETY
This is a safety alert symbol. When you see this symbol on
labels or in manuals, be alert to the potential for personal
injury.
Understand and pay particular attention to the signal words DANGER,
WARNING, or CAUTION.
DANGER indicates an imminently hazardous situation, which, if not
avoided, will result in death or serious injury
WARNING indicates a potentially hazardous situation, which, if not
avoided, could result in death or serious injury
CAUTION indicates a potentially hazardous situation, which, if not
avoided may result in minor or mo derate injury.
alert against unsafe practices and hazards involving only property damage.
.
.
It is also used to
Combustion Air Intake and Vent Connection Size at Furnace
(All Models) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Estimated Free Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Free Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Unconfined Space Minimum Area in Square Inch . . . . . . . . . . . . . . .19
Inlet Gas Pressure Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Nominal Manifold Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Blower Performance CFM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Filter Performance - Pressure Drop Inches W.C. and (kPa) . . . . . . . .27
Field Installed Accessories - Non Electrical . . . . . . . . . . . . . . . . . . . .28
Improper installation may create a condition where the operation of
the product could cause personal injury or property damage.
Improper installation, adjustment, alteration, service or maintenance can cause injury or property damage. Refer to this manual
for assistance or for additional information, consult a qualified contractor, installer or service agency.
This product must be installed in strict compliance with the installation instructions and any applicable local, state, and national codes
including, but not limited to building, electrical, and mechanical
codes.
272313-UIM-A-0407
272313-UIM-A-0407
SPECIFIC SAFETY RULES AND PRECAUTIONS
1. Only Natural gas or Propane (LP) gas are approved for use with
this furnace. Refer to the furnace rating plate or Section IV of
these instructions.
2. Install this furnace only in a location and position as specified in
SECTION I of these instructions.
3. A gas-fired furnace for installation in a residential garage must be
installed as specified in SECTION I of these instructions.
4. Provide adequate combustion and ventilation air to the furnace
space as specified in SECTION VI of these instructions.
5. Combustion products must be discharged outdoors. Connect this
furnace to an approved vent system only, as specified in SECTION VI of these instructions.
FIRE OR EXPLOSION HAZARD
Failure to follow the safety warnings exactly could result in serious
injury, death or property damage.
Never test for gas leaks with an open flame. Use a commercially
available soap solution made specifically for detection of leaks to
check all connections. A fire or explosion may result causing property damage, personal injury or loss of life.
6. Tests for gas leaks as specified in SECTION XI of these instructions.
7. Always install the furnace to operate within the furnace’s intended
temperature rise range. Only connect the furnace to a duct system
which has an external static pressure within the allowable range,
as specified on the furnace rating plate.
8. When a furnace is installed so that supply ducts carry air circulated
by the furnace to areas outside the space containing the furnace,
the return air shall also be handled by duct(s) sealed to the furnace casing and terminating outside the space containing the furnace.
9. It is permitted to use the furnace for heating of buildings or structures under construction. Installation must comply with all manufacturer’s installation instructions including:
• Proper vent installation;
• Furnace operating under thermostatic control;
• Return air duct sealed to the furnace;
• Air filters in place;
• Set furnace input rate and temperature rise per rating plate
marking;
• Means for providing outdoor air required for combustion;
• Return air temperature maintained between 55ºF (13ºC) and
80ºF (27ºC);
• The air filter must be replaced upon substantial completion of
the construction process;
• Clean furnace, duct work and components upon substantial
completion of the construction process, and verify furnaceoperating conditions including ignition, input rate, temperature
rise and venting, according to the manufacturer’s instructions.
10. When installed in a Non-HUD-Approved Modular Home or building
constructed on-site, combustion air shall not be supplied from
occupied spaces.
11. The size of the unit should be based on an acceptable heat loss
calculation for the structure. ACCA, Manual J or other approved
methods may be used.
SAFETY REQUIREMENTS
• This furnace should be installed in accordance with all national
and local building/safety codes and requirements, local plumbing
or wastewater codes, and other applicable codes. In the absence
of local codes, install in accordance with the National Fuel Gas
Code ANSI Z223.1/NFPA 54, National Fuel Gas Code, and/or
CAN/CGA B149.1 Natural Gas and Propane Installation Code
(latest editions). Furnaces have been certified to the latest edition
of standard ANSI Z21-47 • CSA 2.3.
• Refer to the unit rating plate for the furnace model number, and
then see the dimensions page of this instruction for return air plenum dimensions in Figure 1. The plenum must be installed
according to the instructions.
• Provide clearances from combustible materials as listed under
Clearances to Combustibles in Table 1.
• Provide clearances for servicing ensuring that service access is
allowed for both the burners and blower.
• These models ARE NOT
into a HUD Approved Modular Home
(Mobile) Home.
• This furnace is not approved for installation in trailers or recreational vehicles.
• Failure to carefully read and follow all instructions in this
manual can result in furnace malfunction, death, personal
injury and/or property damage.
• Furnaces for installation on combustible flooring shall not be
installed directly on carpeting, tile or other combustible material
other than wood flooring.
• Check the rating plate and power supply to be sure that the electrical characteristics match. All models use nominal 115 VAC, 1
Phase, 60-Hertz power supply. DO NOT CONNECT THIS APPLIANCE TO A 50 HZ POWER SUPPLY OR A VOLTAGE ABOVE
130 VOLTS.
• Furnace shall be installed so the electrical components are protected from water.
• Installing and servicing heating equipment can be hazardous due
to the electrical components and the gas fired components. Only
trained and qualified personnel should install, repair, or service
gas heating equipment. Untrained service personnel can perform
basic maintenance functions such as cleaning and replacing the
air filters. When working on heating equipment, observe precautions in the manuals and on the labels attached to the unit and
other safety precautions that may apply.
• These instructions cover minimum requirements and conform to
existing national standards and safety codes. In some instances
these instructions exceed certain local codes and ordinances,
especially those who have not kept up with changing residential
and non-HUD modular home construction practices. These
instructions are required as a minimum for a safe installation.
CSA listed or approved for installation
or a Manufactured
COMBUSTION AIR QUALITY
(LIST OF CONTAMINANTS)
The furnace will require OUTDOOR AIR for combustion when the furnace is located in any of the following environments.
• Restricted Environments
• Commercial buildings
• Buildings with indoor pools
• Furnaces installed in laundry rooms
• Furnaces installed in hobby or craft rooms
• Furnaces installed near chemical storage areas
• Chemical Exposure
The furnace will require OUTDOOR AIR for combustion when the furnace is located in an area where the furnace is being exposed to the following substances and / or chemicals.
• Permanent wave solutions
• Chlorinated waxes and cleaners
• Chlorine based swimming pool chemicals
• Water softening chemicals
• De-icing salts or chemicals
• Carbon tetrachloride
• Halogen type refrigerants
• Cleaning solvents (such as perchloroethylene)
• Printing inks, paint removers, varnishes, etc.
• Hydrochloric acid
• Cements and glues
• Antistatic fabric softeners for clothes dryers
• Masonry acid washing materials
When outdoor air is used for combustion, the combustion air intake pipe
termination must be located external to the building and in an area
where there will be no exposure to the substances listed above.
2 Unitary Products Group
The furnace area must not be used as a broom closet or for any
other storage purposes, as a fire hazard may be created. Never
store items such as the following on, near or in contact with the furnace.
1. Spray or aerosol cans, rags, brooms, dust mops, vacuum
cleaners or other cleaning tools.
2. Soap powders, bleaches, waxes or other cleaning compounds; plastic items or containers; gasoline, kerosene, cigarette lighter fluid, dry cleaning fluids or other volatile fluid.
3. Paint thinners and other painting compounds.
4. Paper bags, boxes or other paper products
Never operate the furnace with the blower door removed. To
do so could result in serious personal injury and/or equipment
damage.
FOR FURNACES INSTALLED IN THE COMMONWEALTH OF MASSACHUSETTS ONLY
For all side wall horizontally vented gas fueled equipment installed in
every dwelling, building or structure used in whole or in part for residential purposes, including those owned or operated by the Commonwealth and where the side wall exhaust vent termination is less
than seven (7) feet above finished grade in the area of the venting,
including but not limited to decks and porches, the following requirements shall be satisfied:
1. INSTALLATION OF CARBON MONOXIDE DETECTORS. At
the time of installation of the side wall horizontal vented gas
fueled equipment, the installing plumber or gasfitter shall
observe that a hard wired carbon monoxide detector with an
alarm and battery back-up is installed on the floor level where
the gas equipment is to be installed. In addition, the installing
plumber or gasfitter shall observe that a battery operated or
hard wired carbon monoxide detector with an alarm is installed
on each additional level of the dwelling, building or structure
served by the side wall horizontal vented gas fueled equipment.
It shall be the responsibility of the property owner to secure the
services of qualified licensed professionals for the installation of
hard wired carbon monoxide detectors
a. In the event that the side wall horizontally vented gas
fueled equipment is installed in a crawl space or an attic,
the hard wired carbon monoxide detector with alarm and
battery back-up may be installed on the next adjacent floor
level.
b. In the event that the requirements of this subdivision can
not be met at the time of completion of installation, the
owner shall have a period of thirty (30) days to comply with
the above requirements; provided, however, that during
said thirty (30) day period, a battery operated carbon monoxide detector with an alarm shall be installed.
2. APPROVED CARBON MONOXIDE DETECTORS. Each carbon monoxide detector as required in accordance with the
above provisions shall comply with NFPA 720 and be ANSI/UL
2034 listed and IAS certified.
3. SIGNAGE. A metal or plastic identification plate shall be permanently mounted to the exterior of the building at a minimum
height of eight (8) feet above grade directly in line with the
exhaust vent terminal for the horizontally vented gas fueled
heating appliance or equipment. The sign shall read, in print
size no less than one-half (1/2) inch in size, "GAS VENT
DIRECTLY BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS".
4. INSPECTION. The state or local gas inspector of the side wall
horizontally vented gas fueled equipment shall not approve the
installation unless, upon inspection, the inspector observes carbon monoxide detectors and signage installed in accordance
with the provisions of 248 CMR 5.08(2)(a)1 through 4.
272313-UIM-A-0407
INSPECTION
As soon as a unit is received, it should be inspected for possib le damage during transit. If damage is evident, the extent of the damage
should be noted on the carrier’s freight bill. A separate request for
inspection by the carrier’s agent should be made in writing. Also, before
installation the unit should be checked for screws or bolts, which may
have loosened in transit. There are no shipping or spacer brackets
which need to be removed.
FURNACE LOCATION AND CLEARANCES
The furnace shall be located using the following guidelines:
1. Where a minimum amount of air intake/vent piping and elbows will
be required.
2. As centralized with the air distribution as possible.
3. Where adequate combustion air will be available (particularly
when the appliance is not using outdoor combustion air).
4. Where it will not interfere with proper air circulation in the confined
space.
5. Where the outdoor combustion air/vent terminal will not be blocked
or restricted. Refer to “COMBUSTION AIR / VENT CLEARANCES” located in SECTION VII of these instructions. These minimum clearances must be maintained in the installation.
6. Where the unit will be installed in a level position with no more
than 1/4” (6.4 mm) slope side-to-side and front-to-back to provide
proper condensate drainage.
Installation in freezing temperatures:
1. Furnace shall be installed in an area where ventilation facilities
provide for safe limits of ambient temperature under normal operating conditions. Ambient temperatures must not fall below 32°F
(0°C) unless the condensate system is protected from freezing.
2. Do not allow return air temperature to be below 55º F (13° C) for
extended periods. To do so may cause condensation to occur in
the main heat exchanger, leading to premature heat exchanger
failure.
Improper installation in an ambient below 32ºF (0.0° C) could create
a hazard, resulting in damage, injury or death.
3. If this furnace is installed in any area where the ambient temperature may drop below 32° F (0° C), a UL listed self-regulated heat
tape must be installed on any condensate drain lines. It is required
that self regulating heat tape rated at 3 watts per foot be used.
This must be installed around the condensate drain lines in the
unconditioned space. Always install the heat tape per the manufacturer's instructions. Cover the self-regulating heat tape with
fiberglass, Armaflex or other heat resistant insulating material.
4. If this unit is installed in an unconditioned space and an extended
power failure occurs, there will be potential damage to the condensate trap, drain lines and internal unit components. Following a
power failure situation, do not operate the unit until inspection and
repairs are performed.
Clearances for access:
Ample clearances should be provided to permit easy access to the unit.
The following minimum clearances are recommended:
1. Twenty-four (24) inches (61 cm) between the front of the furnace
and an adjacent wall or another appliance, when access is
required for servicing and cleaning.
2. Eighteen (18) inches (46 cm) at the side where access is required
for passage to the front when servicing or for inspection or
replacement of flue/vent connections.
In all cases, accessibility clearances shall take precedence over clearances for combustible materials where accessibility clearances are
greater.
Installation in a residential garage:
A gas-fired furnace for installation in a residential garage must be
installed so the burner(s) and the ignition source are located not less
than 18 inches (46 cm) above the floor, and the furnace must be located
or protected to avoid physical damage by vehicles.
Unitary Products Group 3
272313-UIM-A-0407
TABLE 1:
SECTION II: DUCTWORK
DUCTWORK GENERAL INFORMATION
The duct system’s design and installation must:
1. Handle an air volume appropriate for the served space and within
2. Be installed in accordance with standards of NFPA (National Fire
3. Create a closed duct system. For residential and Non-HUD Modu-
4. Complete a path for heated or cooled air to circulate through the
The cooling coil must be installed in the supply air duct, downstream of the furnace. Cooled air may not be passed over the heat
exchanger.
When the furnace is used in conjunction with a cooling coil, the coil
must be installed parallel with, or in the supply air side of the furnace to
avoid condensation in the primary heat exchanger. When a parallel flow
arrangement is used, dampers or other means used to control airflow
must be adequate to prevent chilled air from entering the furnace. If
manually operated, the damper must be equipped with means to prevent the furnace or the air conditioner from operating unless the damper
is in full heat or cool position.
The duct system must be properly sized to obtain the correct airflow
for the furnace size that is being installed.
Refer to Table 7 and the furnace rating plate for the correct rise
range and static pressures
If the ducts are undersized, the result will be high duct static pressures and/or high temperature rises which can result in a heat
exchanger OVERHEATING CONDITION. This condition can result
in premature heat exchanger failure, which can result in personal
injury, property damage, or death.
Unit Clearances to Combustibles
Application
Upflow 1 (2.5) 3 (7.6) 0 (0) 0 (0) 0 (0) 0 (0) Combustible Yes Yes
Top Front Rear Left Side Right Side Flue
In. (cm) In. (cm) In. (cm) In. (cm) In. (cm) In. (cm)
Floor/
Bottom
Closet
Alcove
DUCTWORK INSTALLATION AND SUPPLY PLENUM
CONNECTION
A proper Heat Loss/Gain Calculation should be done on all
installations for proper application of equipment. From this
the operating parameters of the furnace specifications.
Protection Association) as outlined in NFPA pamphlets 90A and
90B (latest editions) or applicable national, provincial, or state, and
local fire and safety codes.
lar Home installations, when a furnace is installed so that the supply ducts carry air circulated by the furnace to areas outside the
space containing the furnace, the return air shall also be handled
by a duct(s) sealed to the furnace casing and terminating outside
the space containing the furnace.
air conditioning and heating equipment and to and from the conditioned space.
approved flexible duct connector is recommended on all installations to
prevent noise transmission. All connections should be sealed to prevent
air leakage. Sheet metal should be crosshatched to eliminate any popping when the indoor fan is energized.
When replacing an existing furnace, if the existing supply plenum is not
the same size as the new furnace then the existing plenum must be
removed and a new plenum installed that is of the proper size for the
new furnace. The minimum plenum height is 12” (30 cm). If the plenum
is shorter than 12” (30 cm) the turbulent air flow may cause the limit
controls not to operate as designed if at all.
NOTE: When attaching duct flange, do not shoot the screw down into
the casing. Use the formed flange intended for duct flange attachment.
The duct system is a very important part of the installation. If the duct
system is improperly sized the furnace will not operate properly.
The ducts attached to the furnace plenum should be of sufficient size so
that the furnace operates at the specified external static pressure and
within the air temperature rise specified on the nameplate.
Table 2 is a guide for determining whether the rectangular duct system
that the furnace is being connected to be of sufficient size for proper furnace operation.
Use the Example below to help you in calculating the duct area to determine whether the ducts have sufficient area so that the furnace operates at the specified external static pressure and within the air
temperature rise specified on the nameplate.
The following are general duct sizing guidelines that may not serve to
requirements of every application.
Example: The furnace input is 80,000 BTUH, 1,200 CFM blower
requirement. The recommended duct area is 216 sq.in, there are two 8
x 12 rectangular ducts attached to the plenum and there are two 7 inch
round ducts attached to the furnace.
1. Take 8 x 12, which equals 96 square inch x 2 = 192 square inches
2. The square inch area for 7 inch round ducts, 38.4 square inch x 2
3. Then take the 192 square inch from the rectangular duct and add it
In this example, the duct system attached to the plenum has a sufficient
area so that the furnace operates at the specified external static pressure and within the air temperature rise specified on the nameplate.
Providing the return duct is properly sized as well.
the ductwork sizing can be calculated, ACCA Manual J and
D and industry standards are helpful.
Attach the supply plenum to the furnace or coil outlet duct
connection flanges. This is typically through the use of S
cleat material when a metal plenum is used. The use of an
then go to round duct size located in Table 3.
= 76.8 square inches,
to the 76.8 square inch of round duct. The total square inch of duct
attached to the furnace supply plenum is 268.8 square inches.
This exceeds the recommended 216 square inch of duct.
Attic
4 Unitary Products Group
272313-UIM-A-0407
TABLE 2:
Minimum Duct Sizing For Proper Airflow
Input Airflow
Return
1
Rectangular
2
Round
2
Supply
3
Rectangular
2
Round
2
BTU/H (kW) CFM (m³/min) In² (cm²) in. x in. (cm x cm) in. (cm) dia. In² (cm²) in. x in. (cm x cm) in. (cm) dia.
40,000(17.6) 1,200 (34.0) 280 (1806) 14 x 20 (35.6 x 50.8) 18 (45.7) 216 (1393) 12 x 18 (30.5 x 45.7) 16 (40.6)
60,000 (17.6) 1,200 (34.0) 280 (1806) 14 x 20 (35.6 x 50.8) 18 (45.7) 216 (1393) 12 x 18 (30.5 x 45.7) 16 (40.6)
80,000 (23.4) 1,200 (34.0) 280 (1806) 14 x 20 (35.6 x 50.8) 18 (45.7) 216 (1393) 12 x 18 (30.5 x 45.7) 16 (40.6)
80,000 (23.4) 1,600 (45.3) 360 (2322) 18 x 20 (45.7 x 50.8) 22 (55.8) 280 (1806) 14 x 20 (35.6 x 50.8) 18 (45.7)
100,000 (29.3) 1,600 (45.3) 360 (2322) 18 x 20 (45.7 x 50.8) 22 (55.8) 280 (1806) 14 x 20 (35.6 x 50.8) 18 (45.7)
100,000 (29.3) 2,000 (56.6) 440 (2838) 20 x 22 (50.8 x 55.8) 24 (60.9) 390 (2516) 16 x 22 (40.6 x 55.8) 22 (55.8)
120,000 (35.2) 2,000 (56.6) 440 (2838) 20 x 22 (50.8 x 55.8) 24 (60.9) 390 (2516) 16 x 22 (40.6 x 55.8) 22 (55.8)
NOTE: This chart does not replace proper duct sizing calculations or take into account static pressure drop for run length and fittings. Watch out for the temperature rise
and static pressures.
1. Maximum return air velocity in rigid duct @ 700 feet per minute (213 m/min).
2. Example return main trunk duct minimum dimensions.
3. Maximum supply air velocity in rigid duct @ 900 feet per minute (274m/min)..
TABLE 3:
Round Duct Size
Round Duct Size Calculated Area For Each Round Duct Size
inches (cm)
Sq.in (cm
2
)
5 (13) 19.6 (126)
6 (15) 28.2 (182)
7 (18) 38.4 (248)
8 (20) 50.2 (324)
9 (23) 63.6 (410)
IMPORTANT: The minimum plenum height is 12” (30 cm). The furnace
will not operate properly on a shorter plenum height. The minimum recommended rectangular duct height is 4” (10 cm) attached to the plenum.
IMPORTANT: The air temperature rise should be taken only after the
furnace has been operating for at least 15 minutes. Temperatures and
external static pressures should be taken 6” (15 cm) past the first bend
from the furnace in the supply duct and the return duct. If an external filter box or an electronic air cleaner is installed, take the return air read-
ings before the filter box or air cleaner.
10 (25) 78.5 (506)
11 (28) 95 (613)
12 (30) 113.1 (730)
13 (33) 132.7 (856)
14 (36) 153.9 (993)
1. The Air Temperature Rise is determined by subtracting the Return
Air Temperature Reading from the Supply Air Temperature Reading.
2. The External Static Pressure is determined by adding the Supply
Duct Static Pressure reading to the Return Duct Static Pressure
reading and adding the pressure drop across any applied coil.
TABLES 2 AND 3 are to be used as a guide only to help the installer
determine if the duct sizes are large enough to obtain the proper air flow
(CFM) through the furnace. TABLES 2 and 3 ARE NOT to be used to
design ductwork for the building where the furnace is being installed.
There are several variables associated with proper duct sizing that are
not included in the tables. To properly design the ductwork for the building, Refer to the ASHRAE Fundamentals Handbook, Chapter on
The supply air temperature MUST NEVER exceed the Maximum
Supply Air Temperature, specified on the nameplate.
Operating the furnace above the maximum supply air temperature
will cause the heat exchanger to overheat, causing premature heat
exchanger failure. Improper duct sizing, dirty air filters, incorrect
manifold pressure, incorrect gas orifice and/or a faulty limit switch
can cause the furnace to operate above the maximum supply air
temperature. Refer to sections II and III for additional information on
correcting the problem.
If a matching cooling coil is used, it may be placed directly on the furnace outlet and sealed to prevent leakage. Follow the coil instructions
for installing the supply plenum. On all installations without a coil, a
removable access panel is recommended in the outlet duct such that
smoke or reflected light would be observable inside the casing to indicate the presence of leaks in the heat exchanger. This access cover
shall be attached in such a manner as to prevent leaks.
“DUCT DESIGN” or a company that specializes in Residential and Modular Home duct designs.
Unitary Products Group 5
272313-UIM-A-0407
CONDENSATE
DRAIN 7/8” K.O.
OPTIONAL RETURN AIR
CUT-OUT (either side)
FOR USE WITH
EXTERNAL FILTER
FRAME
1-1/2” GAS
PIPE ENTRY
7/8” JUNCTION
BOX HOLE
T-STAT WIRING
7/8” K.O.
13-7/8
A
1-1/2” GAS
PIPE ENTRY
40
7/8” JUNCTION
BOX HOLE
T-STAT WIRING
7/8” K.O.
CONDENSATE
DRAIN 7/8” K.O.
7/8
FIGURE 1: Dimensions
BTUH (kW)
Input
40 (11.7) 1200 (34.0) A 14-1/2 36.8 13-1/4 33.7 11-1/2 29.2 6-1/4 15.9
60 (17.8) 1200 (34.0) B 17-1/2 44.4 16-1/4 41.3 14-1/2 36.8 8-1/2 21.6
80 (12.4) 1200 (34.0) B 17-1/2 44.4 16-1/4 41.3 14-1/2 36.8 8-1/2 21.6
80 (23.4) 1600 (45.3) C 21 53.3 19-3/4 50.2 18 45.7 8-7/8 22.5
100 (29.3) 1600 (45.3) C 21 53.3 19-3/4 50.2 18 45.7 8-7/8 22.5
100 (29.3) 2000 (56.6) C 21 53.3 19-3/4 50.2 18 45.7 8-7/8 22.5
120 (35.1) 2000 (56.6) D 24-1/2 62.2 23-1/4 59.4 21-1/2 54.6 10-5/8 27.0
23-3/4
30-1/8
LEFT SIDE
m
CFM
3
/min)
7/8
26-3/4
BOTTOM IMAGE
RETURN END
Cabinet
Size
RIGHT SIDE
5/8
5/8
B
1-1/2
C
FRONT
1-1/4
24-3/8
20
D
2
24-17/16
TOP IMAGE
SUPPLY END
Cabinet Dimension
A (in.) A (cm) B (in.) B (cm) C (in.) C (cm) D (in.) D (cm)
RESIDENTIAL AND NON HUD MODULAR HOME
RETURN PLENUM CONNECTION
Return air may enter the furnace through the side(s) or bottom depending on the type of application. Return air may not be connected into the
rear panel of the unit. In order to stay within the velocity rating of the filter(s), it is recommended that applications over 1800 CFM (51 m³/min)
use return air from two sides, one side and the bottom or bottom only.
For single return application, see data and notes on blower performance data tables in this manual.
BOTTOM RETURN AND ATTIC INSTALLATIONS
Bottom return applications normally pull return air through a base platform or return air plenum. Be sure the return platform structure or return
air plenum is suitable to support the weight of the furnace.
The furnace base is equipped with a rectangular blockoff panel that can
be removed by performing the following steps:
6 Unitary Products Group
1. Lay the furnace on its back.
2. Remove the screws from the toe plate.
3. Remove the toe plate.
4. Pull the base plate out of the furnace base.
5. Reinstall the toe plate and secure with the screws that were
removed.
Attic installations must meet all minimum clearances to combustibles
and have floor support with required service accessibility.
IMPORTANT: If an external mounted filter rack is being used see the
instructions provided with that accessory for proper hole cut size.
SECTION III: FILTERS
FILTER INSTALLATION
All applications require the use of a filter.
Filters must be installed external to the furnace cabinet. DO NOT
attempt to install filters inside the furnace.
272313-UIM-A-0407
TABLE 4:
Recommended Filter Sizes
Input
BTU/H (kW)
(m
CFM
3
/min)
Cabinet
Size
Side Return
Filter in. (cm)
40 (11.7) 1200 (34.0) A 16 x 25 (41 x 64) 14 x 25 (36 x 64)
60 (17.8) 1200 (34.0) B 16 x 25 (41 x 64) 16 x 25 (41 x 64)
80 (23.4) 1200 (34.0) B 16 x 25 (41 x 64) 16 x 25 (41 x 64)
80 (23.4) 1600 (45.3) C 16 x 25 (41 x 64) 20 x 25 (51 x 64)
100 (29.3) 1600 (45.3) C 16 x 25 (41 x 64) 20 x 25 (51 x 64)
100 (29.3) 2000 (56.6) C 16 x 25 (41 x 64) 20 x 25 (51 x 64)
120 (35.1) 2000 (56.6) D (2) 16 x 25 (2) (41 x 64) 22 x 25 (56 x 64)
NOTES:
1. Air velocity through throwaway type filters may not exceed 300 feet per minute. All velocities over this require the use of hi gh velocity filters.
2. Air flows above 1800 CFM require either return from two sides or one side plus bottom.
SIDE RETURN - FILTER INSTALLATION
Locate and mark the side return opening. Refer to Figure 1 for dimensions of the cutout.
Install the side filter rack following the instructions provided with that
accessory. If a filter(s) is provided at another location in the return air
system, the ductwork may be directly attached to the furnace side
panel.If not provided with the furnace, an accessory filter rack is available for mounting the filter external to the cabinet.
IMPORTANT: Some accessories such as electronic air cleaners and
pleated media may require a larger side opening. Follow the instructions supplied with that accessory for side opening requirements. Do
not cut the opening larger than the dimensions shown in Figure 1.
GAS PIPING INSTALLATION
Properly sized wrought iron, approved flexible or steel pipe must be
used when making gas connections to the unit. If local codes allow the
use of a flexible gas appliance connection, always use a new listed connector. Do not use a connector that has previously serviced another gas
appliance.
Some utility companies or local codes require pipe sizes larger than the
minimum sizes listed in these instructions and in the codes. The furnace
rating plate and the instructions in this section specify the type of gas
approved for this furnace - only use those approved gases. The installation of a drip leg and ground union is required. Refer to Figure 3.
EXTERNAL MANUAL
SHUTOFF VALVE
Bottom Return
Filter in. (cm)
All installations must have a filter installed.
SECTION IV: GAS PIPING
GAS SAFETY
An overpressure protection device, such as a pressure regulator,
must be installed in the gas piping system upstream of the furnace
and must act to limit the downstream pressure to the gas valve so it
does not exceed 0.5 PSI {14" w.c. (3.48 kPa)}. Pressures exceeding 0.5 PSI {14” w.c. (3.48 kPa)} at the gas valve will cause damage
to the gas valve, resulting in a fire or explosion or cause damage to
the furnace or some of its components that will result in property
damage and loss of life.
HIGH STAGE REGULATOR
ON OFF
SWITCH
ADJUSTMENT
VENT
PORT
OUTLET
LOW STAGE REGULATOR
ADJUSTMENT
OUTLET
PRESSURE
PORT
INLET
WRENCH
BOSS
INLET
PRESSURE
PORT
FIGURE 2: Gas Valve
IMPORTANT: Plan your gas supply before determining the correct gas
pipe entry. Use 90-degree service elbow(s), or short nipples and conventional 90-degree elbow(s) to enter through the cabinet access holes.
TO GAS
SUPPLY
DRIP
LEG
TO GAS
SUPPLY
GROUNDED JOINT UNION
MAY BE INSTALLED
INSIDE OR OUTSIDE UNIT.
FIGURE 3: Gas Piping
IMPORTANT: An accessible manual shutoff valve must be installed
upstream of the furnace gas controls and within 6 feet (1.8 m) of the furnace.
The furnace must be isolated from the gas supply piping system by
closing its individual external manual shutoff valve during any pressure
testing of the gas supply piping system at pressures equal to or greater
than 1/2 psig (3.5 kPa).
Never apply a pipe wrench to the body of the gas valve when
installing piping. A wrench must be placed on the octagonal hub
located on the gas inlet side of the valve. Placing a wrench to the
body of the gas valve will damage the valve causing improper operation and/or the valve to leak.
Gas piping may be connected from either side of the furnace using any
of the gas pipe entry knockouts on both sides of the furnace. Refer to
Figure 1 dimensions.
The inlet to the gas valve lines up directly with the opening in the left
side of the furnace casing. To line up with the opening in the right side
of the casing, two street ells should be used.
Unitary Products Group 7
272313-UIM-A-0407
GAS ORIFICE CONVERSION FOR PROPANE (LP)
This furnace is constructed at the factory for natural gas-fired operation,
but may be converted to operate on propane (LP) gas by using a factory-supplied LP conversion kit. Follow the instructions supplied with
the LP kit. Refer to the instructions in the propane (LP) conversion kit
for the proper gas orifice size.
HIGH ALTITUDE GAS ORIFICE CONVERSION
This furnace is constructed at the factory for natural gas-fired op eration
at 0 – 8,000 feet (0-m – 2,438 m) above sea level.
TABLE 5:
TABLE 6:
Nominal Manifold Pressure - High Fire
Second Stage Manifold Pressures (in wc) Second Stage Manifold Pressures (kpa)
Altitude (feet) Altitude (m)
0-7999 8000-8999 9000-9999 0-2437 2438-2742 2743-3048
800 3.5 3.5 3.5
850 3.5 3.5 3.5 31.7 0.87 0.87 0.87
900 3.5 3.5 3.5 33.5 0.87 0.87 0.87
950 3.5 3.5 3.3 35.4 0.87 0.87 0.81
1000 3.5 3.2 2.9 37.3 0.87 0.80 0.73
(BTU/cu ft.)
Gas Heating Value
1050 3.5 2.9 2.7 39.1 0.87 0.73 0.67
1100 3.2 2.7 2.4 41.0 0.80 0.66 0.61
2500 (LP) 9.8 8.2 7.5 93.2 (LP) 2.44 2.03 1.86
Nominal Manifold Pressure - Low Fire
First Stage Manifold Pressures (in wc) First Stage Manifold Pressures (kpa)
Altitude (feet) Altitude (m)
0-7999 8000-8999 9000-9999 0-2437 2438-2742 2743-3048
800 1.7 1.7 1.7
850 1.7 1.7 1.7 31.7 0.42 0.42 0.42
900 1.7 1.7 1.7 33.5 0.42 0.42 0.42
950 1.7 1.7 1.5 35.4 0.42 0.42 0.38
1000 1.6 1.5 1.4 37.3 0.41 0.37 0.34
(BTU/cu ft.)
Gas Heating Value
1050 1.5 1.4 1.3 39.1 0.37 0.34 0.31
1100 1.3 1.2 1.1 41.0 0.34 0.31 0.28
2500 (LP) 4.1 3.8 3.5 93.2 (LP) 1.03 0.95 0.87
The manifold pressure must be changed in order to maintain proper
and safe operation when the furnace is installed in a location where the
altitude is greater than 8,000 feet (2,438 m) above sea level. Refer to
Tables 5 & 6 for proper manifold pressure settings.
HIGH ALTITUDE PRESSURE SWITCH CONVERSION
For installation where the altitude is less than 8,000 feet (2,438 m), it is
not required that the pressure switch be changed. For altitudes above
8,000 feet (2,438 m), see Table 19 Field Installed Accessories - High
Altitude pressure Switch.
29.8 0.87 0.87 0.87
(MJ/cu m)
Gas Heating Value
29.8 0.42 0.42 0.42
(MJ/cu m)
Gas Heating Value
PROPANE AND HIGH ALTITUDE CONVERSION KITS
It is very important to choose the correct kit and/or gas orifices for the altitude and the type of gas for which the furnace is being installed.
Only use natural gas in furnaces designed for natural gas. Only use propane (LP) gas for furnaces that have been properly converted to use pro-
pane (LP) gas. Do not use this furnace with butane gas.
Incorrect gas orifices or a furnace that has been improperly converted will create an extremely dangerous condition resulting in premature heat
exchanger failure, excessive sooting, high levels of carbon monoxide, personal injury, property damage, a fire hazard and/or death.
High altitude and propane (LP) conversions are required in order for the appliance to satisfactory meet the application.
An authorized distributor or dealer must make all gas conversions.
In Canada, a certified conversion station or other qualified agency, using factory specified and/or approved parts, must perform the conversion.
The installer must take every precaution to insure that the furnace has been converted to the proper gas orifice size when the furnace is installed.
Do not attempt to drill out any orifices to obtain the proper orifice size. Drilling out a gas orifice will cause misalignment of the burner flames,
causing premature heat exchanger burnout, high levels of carbon monoxide, excessive sooting, a fire hazard, personal injury, property damage
and/or death.
SECTION V: ELECTRICAL POWER
ELECTRICAL POWER CONNECTIONS
Field wiring to the unit must be grounded. Electric wires that are field
installed shall conform to the temperature limitation for 63°F (35°C) rise
wire when installed in accordance with instructions. Refer to Table 7 in
these instructions for specific furnace electrical data.
8 Unitary Products Group
Use copper conductors only.
272313-UIM-A-0407
TABLE 7:
Electrical and Performance Data
Input High/Low Output High/Low Nominal Airflow Cabinet Width Total Unit AFUE Air Temp. Rise
MBH kW MBH kW CFM
3
m
/min
In. cm Amps % °F °C
40/26 12/8 38/24 11/7 1200 34.0 14-1/2 36.8 9 94.0 35 - 65 19 - 36
60/39 18/11 56/36 16/11 1200 34.0 17-1/2 44.4 9 93.2 40 - 70 22 - 39
80/52 23/15 75/49 22/14 1200 34.0 17-1/2 44.4 9 92.5 45 - 75 25 - 42
80/52 23/15 75/49 22/14 1600 45.3 21 53.3 12 92.8 45 - 75 25 - 42
100/65 29/19 93/60 27/18 1600 45.3 21 53.3 12 92.5 45 - 75 25 - 42
100/65 29/19 93/60 27/18 2000 56.6 21 53.3 14 92.8 45 - 75 25 - 42
120/78 35/23 112/73 33/21 2000 56.6 24-1/2 62.2 14 93.2 40 - 70 22 - 39
Input High/Low
Max. Outlet
Air Temp.
Blower Blower Size
MBH kW °F °C HP Amps In. cm Lbs. Kg
Max.
Over-current
Protect
Min. Wire Size
(awg) @ 75 ft.
One Way
Operating
Weight
40/26 12/8 165 73.9 1/2 7.7 11 x 8 27.9 x 20.3 20 14 121 55.0
60/39 18/11 170 76.7 1/2 7.7 11 x 8 27.9 x 20.3 20 14 135 61.4
80/52 23/15 175 79.4 1/2 7.7 11 x 8 27.9 x 20.3 20 14 142 64.5
80/52 23/15 175 79.4 3/4 10.2 11 x 10 27.9 x 25.4 20 14 157 71.4
100/65 29/19 175 79.4 3/4 10.2 11 x 10 27.9 x 25.4 20 14 162 73.6
100/65 29/19 175 79.4 1 12.8 11 x 11 27. 9 x 27.9 20 12 164 74.5
120/78 35/23 170 76.7 1 12.8 11 x 11 27. 9 x 27.9 20 12 180 81.8
Annual Fuel Utilization Efficiency (AFUE) numbers are determined in accordance with DOE Test procedures.
Wire size and over current protection must comply with the National Electrical Code (NFPA-70-latest edition) and all local codes.
The furnace shall be installed so that the electrical components are protected from water.
SUPPLY VOLTAGE CONNECTIONS
to neutral. Connect the green furnace lead (equipment ground) to
the power supply ground. An alternate wiring method is to use a
field provided 2” (5.08 cm) x 4” (10.2 cm) box and cover on the
outside of the furnace. Route the furnace leads into the box using
a protective bushing where the wires pass through the furnace
panel. After making the wiring connections replace the wiring box
cover and screws.
3. The furnace's control system requires correct polarity of the power
supply and a proper ground connection. If the power supply polarity is reversed, the control board will flash 9 times. The furnace will
BLK/BLK
WHT/WHT
GRN/GRN
GND
GRN
N
WHT
L1
HOT
BLK
not operate until the polarity is corrected. Refer to “Furnace Diagnostics” section of the “User’s Information, Maintenance, & Service Manual provided with this furnace.
CLASS 2 SYSTEM
CONTROL WIRING
TO THERMOSTAT
BLOWER
COMPARTMENT
DOOR SWITCH
TRANSFORMER
IGNITION
MODULE
FIGURE 4: Electrical Wiring
IMPORTANT: The power connection leads and wiring box may be relo-
cated to the left side of the furnace. Remove the screws and cut wire tie
holding excess wiring. Reposition on the left side of the furnace and fasten using holes provided.
1. Provide a power supply separate from all other circuits. Install
overcurrent protection and disconnect switch per local/national
electrical codes. The switch should be close to the unit for convenience in servicing. With the disconnect or fused switch in the OFF
position, check all wiring against the unit wiring label. Refer to the
wiring diagram shown in Figure 27.
2. Remove the screws retaining the junction box cover. Route the
power wiring through the opening in the unit into the junction box
with a conduit connector or other proper connection. In the junction box there will be three wires, a Black Wire, a White Wire and a
Green Wire. Connect the power supply as shown on the unit-wiring label on the inside of the blower compartment door or Figure 4.
The black furnace lead must be connected to the L1 (hot) wire
from the power supply. The white furnace lead must be connected
LOW VOLTAGE CONTROL WIRING CONNECTIONS
Install the field-supplied thermostat by following the instructions that
come with the thermostat. With the thermostat set in the OFF position
and the main electrical source disconnected, connect the thermostat
wiring from the wiring connections on the thermostat to the terminal
board on the ignition module, as shown in Figures 5 & 6. Electronic
thermostats may require the common wire to be connected as shown in
Figures 5 & 6. Apply strain relief to thermostat wires passing through
cabinet. If air conditioning equipment is installed, use thermostat wiring
to connect the Y and C terminals on the furnace control board to the
proper wires on the condensing unit (unit outside).
IMPORTANT: Set the heat anticipator in the room thermostat to 0.45
amps. Setting it lower will cause short cycles. Setting it higher will cause
the room temperature to exceed the set points.
IMPORTANT: Some electronic thermostats do not have adjust able heat
anticipators. They may have other type cycle rate adjustments. Follow
the thermostat manufacturer's instructions.
The 24-volt, 40 VA transformer is sized for the furnace components
only, and should not be connected to power auxiliary devices such as
humidifiers, air cleaners, etc. The transformer may provide power for an
air conditioning unit contactor.
Using a Single-Stage Heat Thermostat with the Furnace - This twostage furnace may be used with a single-stage thermostat. Place the
“W2 Delay” jumper in the 10 minute, 15 minute or 20 minute position. If
the jumper is left on the “OFF” pins, the furnace will operate only in low
fire.
Unitary Products Group 9
272313-UIM-A-0407
For additional connection diagrams for all UPG equipment refer to “Low Voltage System Wiring” document available online at www.upgnet.com in the
Product Catalog Section.
(Optional)
C
TWO STAGE
24-Volt Common
AIR CONDITIONING
Y1
Y2
First Stage Cool
Second Stage Cool
R
24-Volt Hot
24V HUMIDIFIER
Interface
Comfort Alert
C
2 STAGE PSC
24-Volt Common
FURNACE CONTROL
C
*PP32U72124
THERMOSTAT
24-Volt Common
C
*DP22U70124
THERMOSTAT
24-Volt Common
C
*DN22C00124 *PP32U71124
THERMOSTAT
24-Volt Common
Y1
First Stage Cool
Single/Second Stage
Y1
Y2
First Stage Cool
Second Stage Cool
Y2
Y1
First Stage Cool
Second Stage Cool
Y
Y2
First Stage Cool
Second Stage Cool
R
24-Volt Hot
R
24-Volt Hot
R
24-Volt Hot
R
24-Volt Hot
G
W2
W/W1
Single/First Stage Heat
E/W1
First Stage Heat
E/W1
First Stage Heat
W
First Stage Heat
Fan
Second Stage Heat
G
W2
Fan
Second Stage Heat
G
W2
Fan
Second Stage Heat
G
W2
Fan
Second Stage Heat
L
HM
Humidistat
Malfunction Light
to MLTI STG
Step 1 of Thermostat User
Configuration Menu must be set
batteries
Connection of the "C"
is optional when used with
Termainal, 24-Volt Common,
batteries
Connection of the "C"
is optional when used with
Termainal, 24-Volt Common,
Features
to ON to use Comfort Alert
Step 16 of Thermostat User
Configuration Menu must be set
set to MS 2
Step 1 of Thermostat User
Configuration Menu must be
Y
C
*PP32U70124
THERMOSTAT
*DN22U00124
THERMOSTAT
First Stage Cool
24-Volt Common
Y
C
First Stage Cool
24-Volt Common
AC9 2 Stage Scroll A/C w/2 Stage Furnace, 2 Stage Cooling Ready- PT8/9; (F,L)*8/9T, (G,L)*8/9T, XYG8S-*, XYF8S-*, XYG9S-*, XYF9S-*
FIGURE 5: Thermostat Chart - AC
10 Unitary Products Group
R
Y2
Y2
RC
Second Stage Cool
24-Volt Hot (Heat XFMR)
R
RC
Second Stage Cool
24-Volt Hot (Heat XFMR)
G
W2
E/W1
First Stage Heat
24-Volt Hot (Cool XFMR)
E/W1
First Stage Heat
24-Volt Hot (Cool XFMR)
Fan
Second Stage Heat
G
W2
Fan
Second Stage Heat
when used with batteries
24-Volt Common, is optional
Connection of the "C" Termainal,
when used with batteries
24-Volt Common, is optional
Connection of the "C" Termainal,
Multistage Conventional
Thermostat Installer Setup
Number 0170 - System Type -
must be set to 8 - 2 Heat/2 Cool
must be set to 6 -
Number 1 - System Type -
Thermostat Installer Setup
Number 15 - Compressor
Thermostat Installer Setup
2 Heat/2 Cool Conventional
Protection - must be set to 5
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