Dettson Chinook C15-2-V Assembly instructions

INSTALLATION INSTRUCTIONS AND HOMEOWNER’S MANUAL:
GAS FIRED FURNACE 2-STAGE ECM
GAS FURNACE
MULTIPOSITION
Models:
C15-2-V
C30-2-V
C45-2-V
C60-2-V
C75-2-V
C105-2-V*
C120-2-V*
Models marqued with * can only be sold in Quebec, Canada
INSTALLER / SERVICE TECHNICIAN:
Use the information in this manual for the installation/servicing of the furnace and keep the document near the unit for
future reference.
HOMEOWNER: Please keep this manual near the furnace for future reference.
Manufactured by: Dettson Industries Inc. Sherbrooke, Qc, Canada www.dettson.com
Gas furnace manufactured on or after May 1, 2017 are not permitted to be used in Canada for heating of buildings or structures under construction
Printed in Canada on
100% recycled paper
2022-06 X40261 revA

Table of content
1 SAFETY 4
1.1 SAFETY LABELING AND WARNING SIGNS . . . . . . . . . . . . . . . 4
1.2 IMPORTANT INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3 SAFETY CONSIDERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4 DETECTIONSYSTEMS .............................. 6
1.5 DANGEROFFREEZING ............................. 6
2 INTRODUCTION 7
2.1 CODESANDSTANDARDS............................ 7
2.2 ELECTROSTATIC DISCHARGE . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 LOCATION........................................ 8
2.3.1 Clearance and accessibility . . . . . . . . . . . 8
2.3.2 Location relative to cooling equipement . . . . . 8
3 INSTALLATION 9
3.1 UPFLOW ......................................... 9
3.1.1 Right side condensate drain trap connection . . . 9
3.1.2 Left side condensate drain trap connection . . . 9
3.2 DOWNFLOW ...................................... 10
3.2.1 Downflow condensate drain trap connection . . . 10
3.2.2 Downflow multiposition pressure switch connection 10
3.3 HORIZONTALRIGHT................................ 11
3.3.1 Horizontal right condensate drain trap connection 11
3.3.2 Horizontal right multiposition pressure switch
connection . . . . . . . . . . . . . . . . . . . . 12
3.4 HORIZONTALLEFT ................................. 12
3.4.1 Horizontal left condensate drain trap connection . 12
3.4.2 Alternate drain trap location in horizontal left position 13
3.4.3 Horizontal left multiposition pressure switch
connection . . . . . . . . . . . . . . . . . . . . 13
3.5 MULTIPOSITION VENTING DRAINAGE. . . . . . . . . . . . . . . . . . . 13
4 DUCT INSTALLATION 13
4.1 GENERAL REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2 DUCT EXTERNAL STATIC PRESSURE . . . . . . . . . . . . . . . . . . . 14
4.3 SMARTDUCTSYSTEM.............................. 14
4.4 RETURN AIR CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.4.1 Bottom return . . . . . . . . . . . . . . . . . . 14
4.4.2 Side return . . . . . . . . . . . . . . . . . . . . 14
4.5 SUPPLYAIRDUCTS ................................ 14
4.5.1 Ductwork acoutiscal treatment . . . . . . . . . . 14
5 GAS SUPPLY AND PIPING 15
5.1 GENERAL ........................................ 15
5.2 PROPANECONVERSION ............................ 15
5.3 GASPIPEGROMMET ............................... 15
5.4 SETTING GAS OUTLET PRESSURE . . . . . . . . . . . . . . . . . . . . 15
6 ELECTRICAL CONNECTIONS 17
6.1 120VWIRING ..................................... 17
6.2 24V THERMOSTAT WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.3 FUSE ........................................... 17
6.4 THERMOSTATS.................................... 17
6.4.1 Single-Stage thermostat . . . . . . . . . . . . . 17
6.4.2 Multi-Stage thermostat . . . . . . . . . . . . . . 17
6.5 ELECTRICDIAGRAM ............................... 17
6.6 ALTERNATE POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . 17
7 VENTING AND COMBUSTION AIR PIPING 18
7.1 GENERAL ........................................ 18
7.2 DIRECTVENT ..................................... 18
7.3 NONDIRECTVENT................................. 18
7.4 SPECIAL VENTING REQUIREMENTS FOR INSTALLATION IN
CANADA ......................................... 19
7.5 MATERIAL ........................................ 19
7.6 SIZE THE VENT AND COMBUSTION AIR PIPES . . . . . . . . . . . 19
7.7 EXHAUST PIPE CONNECTION TO FURNACE . . . . . . . . . . . . . 19
7.8 COMBUSTION AIR PIPE CONNECTION . . . . . . . . . . . . . . . . . 20
7.9 VENTTERMINATION................................ 21
7.9.1 Concentric vent . . . . . . . . . . . . . . . . . . 21
7.9.2 Two pipe termination . . . . . . . . . . . . . . . 21
8 START UP, ADJUSTMENT AND SAFETY CHECK 26
8.1 Startingthefurnace ................................. 26
8.2 SELECTING THE BLOWER SPEED . . . . . . . . . . . . . . . . . . . . . 26
8.3 DELAYTOFANOFF ................................ 27
8.4 DEHUMIDIFICATION ................................ 28
8.5 HEATMODE ...................................... 28
8.6 COOLMODE...................................... 28
8.7 FANONMODE .................................... 28
8.8 FURNACETWINNING ............................... 28
8.9 ERRORCODES.................................... 28
8.10SAFETYCHECK.................................... 28
8.10.1 Prime drain trap . . . . . . . . . . . . . . . . . 28
8.10.2 Furnace commissionning . . . . . . . . . . . . . 28
9 OPERATING YOUR FURNACE 28
9.1 WHAT TO DO IF YOU SMELL GAS . . . . . . . . . . . . . . . . . . . . . . 29
9.2 SHUTTING DOWN THE FURNACE . . . . . . . . . . . . . . . . . . . . . 29
9.2.1 To turn off gas to furnace . . . . . . . . . . . . . 29
10 MAINTENANCE OF YOUR FURNACE 29
10.1 CLEANING/REPLACING THE FILTER . . . . . . . . . . . . . . . . . . . . 29
10.2LUBRICATION ..................................... 29
10.3 CONDENSATE COLLECTION AND DISPOSAL SYSTEM . . . . . 29
10.4ROLLOUTSWITCH ................................. 30
10.5 SAFETY INTERLOCK SWITCH . . . . . . . . . . . . . . . . . . . . . . . . 30
11 FURNACE SPECIFICATION 33
1

List of figures
Figure 1: Right side connection . . . . . . . . . . . . . . 9
Figure 2: Left side connection . . . . . . . . . . . . . . . 9
Figure 3: Downflow position . . . . . . . . . . . . . . . . 10
Figure 4: Downflow position pressure switch assembly . . . 11
Figure 5: Connecting pressure switch in downflow position . 11
Figure 6: Horizontal right position . . . . . . . . . . . . . 11
Figure 7: Horizontal right slope . . . . . . . . . . . . . . 11
Figure 8: Horizontal right pressure switch connection . . . 12
Figure 9: Horizontal right pressure switch tubing . . . . . . 12
Figure 10: Horizontal left position . . . . . . . . . . . . . . 12
Figure 11: Drain trap alternate position . . . . . . . . . . . 13
Figure 12: Horizontal left pressure switch connection . . . . 13
Figure 13: Two stage gas valve . . . . . . . . . . . . . . . 16
Figure 14: Adjustment screw . . . . . . . . . . . . . . . . 16
Figure 15: Typical gas pipe arrangement . . . . . . . . . . 16
Figure 16: . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 17: . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 18: Combustion air moisture trap . . . . . . . . . . . 20
Figure 19: Top panel combustion air . . . . . . . . . . . . . 20
Figure 20: side panel combustion air . . . . . . . . . . . . 21
Figure 21: Roof concentric termination . . . . . . . . . . . 21
Figure 22: Sidewall concentric termination . . . . . . . . . 21
Figure 23: Roof termination . . . . . . . . . . . . . . . . . 21
Figure 24: Standard horizontal termination . . . . . . . . . 22
Figure 25: Alternate horizontal termination A . . . . . . . . 22
Figure 26: Alternate horizontal termination B . . . . . . . . 22
Figure 27: Alternate horizontal termination C . . . . . . . . 22
Figure 28: Venting gasket . . . . . . . . . . . . . . . . . . 22
Figure 29: Direct vent clearance . . . . . . . . . . . . . . . 23
Figure 30: Other than Direct vent clearance . . . . . . . . . 24
Figure 31: Dimensions . . . . . . . . . . . . . . . . . . . . 31
Figure 32: Two Stage ECM Wiring diagram . . . . . . . . . 32
Figure 33: Exploded view Cxx-2-V part 1 . . . . . . . . . . 35
Figure 34: Exploded view Cxx-2-V part 2 . . . . . . . . . . 36
List of tables
Table 1: Codes and Standards . . . . . . . . . . . . . . . 7
Table 2: Minimum clearance . . . . . . . . . . . . . . . . 8
Table 3: Suggested Return size . . . . . . . . . . . . . . 14
Table 4: Inlet Gas Pressure . . . . . . . . . . . . . . . . 16
Table 5: Outlet gas pressure . . . . . . . . . . . . . . . . 16
Table 6: Maximum capacity of pipe Ft³/hr for pipe length ft (m) 16
Table 7: Single stage t-stat with 2 stage ECM furnace . . . 17
Table 8: Maximum equivalent vent length (ft) for 2-stage unit
and altitude up to 4500 ft . . . . . . . . . . . . . 19
Table 9: Deduction for fittings . . . . . . . . . . . . . . . 19
Table 10: Approved combustion air and vent pipe, fitting and
cement materials (U.S.A Installation) . . . . . . . 25
Table 11: Cooling tap selection . . . . . . . . . . . . . . . 26
Table 12: Heating tap selection . . . . . . . . . . . . . . . 26
Table 13: Adjust tap selection . . . . . . . . . . . . . . . . 26
Table 14: CFM C15-2-V - 0381123A . . . . . . . . . . . . 26
Table 15: CFM C30-2-V - 0381124C . . . . . . . . . . . . 27
Table 16: CFM C45-2-V - 0381125C . . . . . . . . . . . . 27
Table 17: CFM C60-2-V - 0381209C . . . . . . . . . . . . 27
Table 18: CFM C75-2-V - 0381210C . . . . . . . . . . . . 27
Table 19: CFM C105-2-V - 0381315C . . . . . . . . . . . . 27
Table 20: CFM C120-2-V - 0381316B . . . . . . . . . . . . 27
Table 21: Heat fan off delay with 2 stage ECM furnace . . . 28
Table 22: Dehum DIP switches . . . . . . . . . . . . . . . 28
Table 23: Electrical data . . . . . . . . . . . . . . . . . . 30
Table 24: Specifications . . . . . . . . . . . . . . . . . . 30
Table 25: Error Codes . . . . . . . . . . . . . . . . . . . . 34
Table 26: Part List CXX-2-V . . . . . . . . . . . . . . . . 37
2

REQUIRED NOTICE FOR MASSACHUSETTS INSTALLATIONS -
IMPORTANT
The Commonwealth of Massachusetts requires compliance with regulation 248 CMR as follows:
5.08: Modifications to NFPA-54, Chapter 10. Revise 10.8.3 by adding the following additional requirements:
For all side wall horizontally vented gas fuelld equipement 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:
Installation of Carbon Monoxide Detectors
At the time of installation of the side wall horizontal vented gas fuelled equipment, the installing plumber or gas fitter shall observe
that a hard wired carbon monoxide detector with an alarm and battery backup is installed on the floor level where the gas equipment
is to be installed. In addition, the installing plumber or gas fitter 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 fuelled equipment. It shall be the responsibility of the property owner to secure the services of qualified license professionals for
the installation of hard wired carbon monoxide detectors.
In the event that the side wall horizontally vented gas fuelled equipment is installed in a crawl space or an attic, the hard wired carbon
monoxide detector with alarm and battery backup may be installed on the next adjacent floor level.
In the event that the requirements of this subdivision cannot be met at the time of completion of installation, the owner shall have a
period of thirty (30) days to comply with the above requirement; provided, however, that during said thirty (30) day period, a battery
operated carbon monoxide detector with an alarm shall be installed.
APPROVED CARBON MONOXIDE DETECTORS: Each carbon monoxide detector as required in accordance with the above provision
shall comply with NFPA 720 and be ANSI/UL 2034 listed and IAS certified.
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 fuelled heating appliance
or equipment. The sign shall read, in print size no less than in-half (1/2) inch in size, “gas vent directly below. Keep clear of all
obstruction”.
INSPECTION: the state of local gas inspector of the side wall horizontally vented gas fuelled 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:
EXEMPTION: the following equipment is exempt from 248 CMR 5.08(2) (a) 1 through 4:
The equipment listed in Chapter 10 entitled “equipment not required to be vented “in the most current edition of NFPA 54 as adopted
by the board; and
Product approved side wall horizontally vented gas fuelled equipment installed in a room or structure separate from the dwelling,
building or structure in whole or in part for residential purposes.
MANUFACTURER REQUIREMENTS – GAS EQUIPMENT VENTING SYSTEM PROVIDED
When the manufacturer of product approved side wall horizontally vented gas equipment provides a venting system design or venting
system component with the equipment, the instructions provided by the manufacturer for installation of the equipment and the venting
system shall include:
Detailed instructions for the installation of the venting system design or the venting system components; and a complete parts list for
the venting system design or venting system.
MANUFACTURER REQUIREMENTS – GAS EQUIPMENT VENTING SYSTEM PROVIDED
When the manufacturer of product approved side wall horizontally vented gas fuelled equipment does not provide the parts or venting
the flue gases, but identifies “special venting system”, the following requirements shall be satisfied by the manufacturer:
The referenced “special venting system” shall be product approved by the board, and the instruction for that system shall include a
parts list and detailed installation instructions.
A copy of all installation instructions for all product, approved side wall horizontally vented gas fuelled equipment, all venting
instructions, all part s lists for venting instructions, and/or all venting design instructions shall remain with the appliance or equipment
at the completion of the installation.
For questions regarding these requirements, please contact the Commonwealth of Massachusetts board of State Examiners of
Plumbers and Gas Fitters, 239 Causeway Street, Boston, MA, 02114, tel.: [phone].
FOR CALIFORNIA RESIDENT
For installation in SCAQMD only: This furnace does not meet the SCAQMD Rule 1111 14ng/J NOx emission limit, and thus is subject
to a mitigation fee of up to $450. This furnace is not eligible for the Clean Air Rebate Program: www.CleanAirFurnaceRebate.com
The efficiency is AHRI efficiency rating certified. This furnace meets California Air Quality Management District emission requirements.
3

1 SAFETY
1.1 SAFETY LABELING AND
WARNING SIGNS
The words DANGER, WARNING and CAUTION are
used to identify the levels of seriousness of certain
hazards. It is important that you understand their meaning.
You will notice these words in the manual as follows:
DANGER
Immediate hazards which WILL result in death or
serious bodily and/or material damage.
WARNING
Hazards or unsafe practices which CAN result in death
or serious bodily and /or material damage.
CAUTION
Hazards or unsafe practices which CAN result in minor
bodily and /or material damage.
1.2 IMPORTANT INFORMATION
WARNING
Non-observance of the safety regulations outlined in
this manual will potentially lead to consequences
resulting in death, serious bodily injury and/or property
damage.
WARNING
Installation and repairs performed by unqualified
persons can result in hazards to them and to others.
Installations must conform to local codes or, in the
absence of such codes, to codes of the country having
jurisdiction.
The information contained in this manual is intended
for use by a qualified technician, familiar with safety
procedures and who is equipped with the proper tools
and test instruments.
Failure to carefully read and follow all instructions in
this manual can result in death, bodily injury and/or
property damage.
1. It is the homeowner’s responsibility to engage a qualified
technician for the installation and subsequent servicing
of this furnace;
2. Do not use this furnace if any part of it was under water.
Call a qualified service technician immediately to assess
the damage and to replace all critical parts that were in
contact with water;
3. Do not store gasoline or any other flammable
substances, such as paper or carton, near the furnace;
4. Do not stack items or boxing within the required
clearances to combustible materials specified in Table 2;
5. Never block or otherwise obstruct the filter and/or return
air openings;
6. Ask the technician installing your furnace to show and
explain to you the following items:
• The main disconnect switch or circuit breaker;
• The gas shut off valve;
• The air filter and how to change it (at least twice a
year);
7. Before calling for service, be sure to have the information
of section 11 of your manual close by in order to be able
to provide the contractor with the required information,
such as the model and serial numbers of the furnace.
WARNING
Failure to follow this warning could result in dangerous
operation, personal injury, death, or property dammage.
Improper installation, adjustement, servicing or repair
can cause carbon monoxide poisoning, explosion, fire,
electrical shock, or other conditions which may cause
personal injury or property damage. Consult a qualified
service agency, local gas supplier, or your distributor
for information or assistance. The qualified service
agency must use only factory authorized and listed kits
or accessories when modifying this product.
WARNING
INJURY HAZARD
Ignoring this warning could result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use
care and wear appropriate protective clothing, safety
glasses and gloves when handling parts, and servicing
furnaces
1.3 SAFETY CONSIDERATION
Untrained personnel can perform basic maintenance functions
such as cleaning and replacing air filters. All other operations
must be performed by trained service personnel. When working
on heating equipement, observe precautions in literature, on
tags, and on labels attached to or shipped with the furnace.
Other safety precautions 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 that may not have kept up with
changing residential construction practices. We require these
instructions as a minimum for a safe installation.
Follow all safety codes. Wear safety glasses, protective clothing
and work gloves. Have a fire extinguisher available. Read
these instructions thoroughly and follow all warnings or cautions
included in the literature and attached to the unit.
4

1. Use only with type of gas approved for this furnace. Refer
to the furnace rating plate and section 5 : GAS SUPPLY
AND PIPING.
2. Install this furnace only in a location and position as
specified in section 3 : INSTALLATION.
3. Provide adequate combustion and ventilation air to the
furnace as specified in section 7 : VENTING AND
COMBUSTION AIR PIPING.
4. Combustion products must be discharged outdoors.
Connect this furnace to an approved vent system only,
as specified in section 7 : VENTING AND COMBUSTION
AIR PIPING.
5. Never test for gas leaks with an open flame. Use a
commercially available soap solution made specifically
for the detection of leaks to check all connections, as
specified in section 5 : GAS SUPPLY AND PIPING.
6. Always install furnace to operate within the furnace’s
intended temperature-rise range with a duct system
which has an external static pressure within the allowable
range, as specified in section
4 : DUCT INSTALLATION of these instructions. See
furnace rating plate.
7. 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.
See section 4 : DUCT INSTALLATION.
This furnace may be installed, with a two pipe sealed
combustion configuration, in a space utilized as part
of the return air supply. A filter must be installed at
the return opening of the furnace and a grill should
be installed in the space to allow proper circulation
of air.
8. Gas furnace manufactured on or after May 1, 2017
are not permitted to be used in Canada for heating of
buildings or structures under construction.
9. A gas-fired furnace for installation in a residential garage
must be installed as specified in the WARNING box
below:
WARNING
FIRE, INJURY OR DEATH HAZARD
Failure to follow this warning could result in personal
injury, death and/or property damage.
When the furnace is installed in a residential garage,
the burners and ignitions sources must be located at
least 18 in. (457 mm) above the floor. The furnace
must be located or protected to avoid damage by
vehicles. When the furnace is installed in a public
garage, airplane hangar, or other building having a
hazardous atmosphere, the furnace must be installed
in accordance with the NFPA 54/ANSI Z223.1-2009 or
CAN/CSA B149.2-2010.
Do not install the furnace on its back or hang furnace
with control compartment facing downward. Safety
control operation will be adversely affected. Never
connect return air duct to the back of the furnace.
WARNING
ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD
Improper servicing could result in dangerous operation,
serious injury, death or property damage.
-Before servicing, disconnect all electrical power to
furnace.
-When servicing controls, label all wires prior to
disconneting. Reconnect wires correctly.
-Verify proper operation after servicing.
WARNING
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal
injury or death. The operation of exhaust fans, kitchen
ventilation fans, clothes dryers, attic exhaust fans
or fireplaces could create a NEGATIVE PRESSURE
CONDITION at the furnace. Make-up air MUST be
provided for the ventilation devices, in addition to that
required by the furnace.
5

WARNING
CARBON MONOXIDE POISONING HAZARD
Failure to follow the steps outlined below for each
appliance connected to the venting system being
placed into operation could result in carbon monoxide
poisoning or death. The following steps shall be
followed for each appliance connected to the venting
system being placed into operation, while all other
appliances connected to the venting system are not in
operation:
1. Seal any unused openings in venting system;
2. Inspect the venting system for proper size and
horizontal pitch, as required in the National Fuel
Gas Code, ANSI Z223.1/NFPA 54 or the Natural
Gas and Propane Installation Code, CSA B149.1
and these instructions. Determine that there is
no blockage or restriction, leakage, corrosion and
other deficiencies which could cause an unsafe
condition;
3. As far as practical, close all building doors and
windows and all doors between the space in
which the appliance(s) connected to the venting
system are located and other spaces of the
building;
4. Close fireplace dampers;
5. Turn on clothes dryers and any appliance not
connected to the venting system. Turn on any
exhaust fans, such as range hoods and bathroom
exhausts, so they are operating at maximum
speed. Do not operate a summer exhaust fan;
6. Follow the lighting instructions. Place the
appliance being inspected into operation.
Adjust the thermostat so appliance is operating
continuously;
7. Test for spillage from draft hood equipped
appliances at the draft hood relief opening after 5
minutes of main burner operation. Use the flame
of a match or candle;
8. If improper venting is observed during any of
the above tests, the venting system must be
corrected in accordance with the National Fuel
Gas Code, ANSI Z223.1/NFPA 54 and/or Natural
Gas and Propane Installation code, CSA B149.1;
9. After it has been determined that each appliance
connected to the venting system properly vents
when tested as outlined above, return doors,
windows, exhaust fans, fireplace dampers and
any other gas-fired burning appliance to their
previous conditions of use;
1.4 DETECTION SYSTEMS
It is recommended that carbon monoxide detectors be installed
wherever oil or gas fired heaters are used. Carbon monoxide
can cause bodily harm or death. For this reason, agency
approved carbon monoxide detectors should be installed in
your residence and properly maintained to warn of dangerously
high carbon monoxide levels.
Also, the house should be equipped with approved and properly
maintained fire extinguishers.
Your unit is equipped with safety devices that can prevent it from
functioning when anomalies are detected such as a blocked
venting system.
1.5 DANGER OF FREEZING
CAUTION
FROZEN AND BURST WATER PIPE HAZARD
Failure to protect against the risk of freezing may result
in property damage. Special precautions MUST be
made if installing furnace in an area which may drop
below freezing. This can cause improper operation or
damage to equipment. If furnace environment has the
potential of freezing, the drain trap and drain line must
be protected.
CAUTION
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in burst water
pipes and/or property damage. If a condensate pump is
installed, a clogged condensate drain or a failed pump
may cause the furnace to shut down. Do not leave
the home unattended during freezing weather without
turning off water supply and draining water pipes or
otherwise protecting against the risk of frozen pipes.
Ensure all condensate drain connections are secured
and liquid tight. Use the furnished tube clamps and
verify tightness
6

2 INTRODUCTION
This multiposition Category IV condensing furnace is CSA
design certified direct vent (2 pipes) or non-direct vent (1 pipe).
The furnace is factory shipped for use with natural gas. The
furnace can be converted in the field for use with propane gas
when a factory supplied conversion kit is used. Refer to the
furnace rating plate for conversion kit information and table 26
This furnace is designed for minimum continuous return air
temperature of 60 °F (16 °C) or intermittent operation down
to 55 °F (13 °C) such as when used with a night setback
thermostat. Return air temperature must not exceed 80 °F (27
°C). Failure to follow these return air temperature limits may
affect reliability of heat exchangers, motors, and controls.
The furnace should be sized to provide at least 100 % of
the design heating load requirement. Heating load estimates
can be made using approved methods available from Air
Conditioning Contractors of America (Manual J); American
Society of Heating, Refrigerating, and Air Conditioning
Engineers; or other approved engineering methods. Excessive
over sizing of the furnace could cause the furnace and/or vent
to fail prematurely.
2.1 CODES AND STANDARDS
Follow all national and local codes and standards in addition
to these instructions. The installation must comply with
regulations of the serving gas supplier, local building, heating,
plumbing, and other codes. In absence of local codes, the
installation must comply with the national codes listed below
and all authorities having jurisdiction. In the United States and
Canada, follow all codes and standards for the following:
Table 1 – Codes and Standards
TOPIC USA CANADA
Safety National Fuel Gas Code
(NFGC) NFPA 54-
2009/ANSI Z223.1 and
the Installation Standards,
Warm Air Heating and
Air Conditioning Systems
ANSI/NFPA 90B
National Standard of
Canada, Natural Gas and
Propane Installation Code
(NSCNGPIC) CAN/CSA
B149.1
General
installation
NFGC and the NFPA 90B.
For copies, contact the
National Fire Protection
Association Inc., Battery
march Park, Quincy, MA
02269; or for only the NFGC
contact the American Gas
Association, 400 N. Capitol,
N.W.,Washington DC 20001
NSCNGPIC. For a copy,
contact Standard Sales,
CSA International, 178
Rexdale Boulevard,
Etobicoke (Toronto),
Ontario, M9W 1R3, Canada
Combustion and
and air ventilation
Section 9.3 of the
NFPA54/ANSI Z223.1
Air for Combustion and
Ventilation
Part 8 of the CAN/CSA
B149.1, Venting Systems
and Air Supply for
Appliances
Duct systems Air Conditioning Contractors Association (ACCA) (Manual
D), Sheet Metal and Air Conditioning Contractors National
Association (SMACNA), or American Society of Heating,
Refrigeration, and Air Conditioning Engineers (ASHRAE).
Acoustical lining
and fibrous glass
duct
current edition of SMACNA, NFPA 90B as tested by UL Standard
181 for Class I Rigid Air Ducts.
Gas piping and
pipe pressure
testing
NFPA 54/ANSI Z223.1
NFGC; Chapters 5, 6, 7,
and 8 and national plumbing
codes.
CAN/CSA-B149.1, Part 6
Manufactured
Mobile housing
Manufactured Home
Construction and Safety
Standard, Title 24 CFR,
Part 3280 or The Standard
for Manufactured Home
Installations ANSI/NCS
A225.1
Canadian Standard for
Series M92 Mobile Homes,
CAN/CSA Z240MH
Electrical
connections
National Electrical Code
(NEC) ANSI/NFPA 70
Canadian Electrical Code
CSA C22.1
Venting Part 7, Venting of
equipment, latest edition of
the National Fuel Gas Code
NPFA 54, 90A and 90B
ANSI Z223.1-
CAN/CSA-B149.1-05 latest
edition
IN THE STATE OF MASSACHUSETTS:
• This product must be installed by a licensed
plumber of gas fitter;
• When flexible connectors are used, the
maximum length shall not exceed 36 in.
(914 mm);
• When lever type gas shutoffs are used they
shall be ”T” handle type;
• The use of copper tubing for gas piping is
not approved by the state of Massachusetts;
7

2.2 ELECTROSTATIC DISCHARGE
CAUTION
FURNACE RELIABILITY HAZARD
Failure to follow this caution may result in unit
component damage. Electrostatic discharge can affect
electronic components. Take precautions during
furnace installation and servicing to protect the furnace
electronic control. These precautions will help to
avoid exposing the control to electrostatic discharge by
putting the furnace, the controls, and the technician at
the same electrostatic potential.
1. Disconnect all power to the furnace. Multiple disconnects
may be required. DO NOT TOUCH THE CONTROL OR
ANY WIRE CONNECTED TO THE CONTROL PRIOR
TO DISCHARGING YOUR BODY’S ELECTROSTATIC
CHARGE TO GROUND.
2. Firmly touch the clean, unpainted, metal surface of the
furnace chassis which is close to the control. Tools held
in a person’s hand during grounding will be satisfactorily
discharged.
3. After touching the chassis, you may proceed to service
the control or connecting wires as long as you do
nothing to recharge your body with static electricity (for
example; DO NOT move or shuffle your feet, do not touch
ungrounded objects, etc.).
4. If you touch ungrounded objects (and recharge your body
with static electricity), firmly touch a clean, unpainted
metal surface of the furnace again before touching
control or wires.
5. Use this procedure for installed and uninstalled
(ungrounded) furnaces.
6. Before removing a new control from its container,
discharge your body’s electrostatic charge to ground
to protect the control from damage. If the control is
to be installed in a furnace, follow items 1 through 4
before bringing the control or yourself in contact with
the furnace. Put down all used and new controls before
touching ungrounded objects.
7. An ESD service kit (available from commercial sources)
may also be used to prevent ESD damage.
2.3 LOCATION
This furnace must :
• Be installed so the electrical components are protected
from water;
• Not be installed directly on any combustible material
other than wood flooring;
• Be located close to the chimney or vent and attached to
an air distribution system. Refer to section 7
Place the unit so that proper venting can be achieved, with a
minimum number of elbows, in accordance with the instructions
in this manual. The furnace should be located as close to the
chimney (vertical venting) or to the outside vent wall (horizontal
venting) as possible.
When installing the furnace, provisions must be made to
ensure the supply of adequate combustion and ventilation air in
accordance with the “air for combustion and ventilation” section
of the National Fuel Gas Code, NFPA 5/ANSI Z223. c1 or
applicable provisions of the local building code.
2.3.1 Clearance and accessibility
Installations must provide ample space for servicing and
cleaning. Always comply with minimum fire protection
clearances shown in table 2 or on the furnace rating label.
Clearances must also accomodate an installation’s gas,
electrical, drain trap and venting/combustion air piping. If the
combustion air is installed to the side of the furnace, additionnal
clearance must be provided.
2.3.2 Location relative to cooling
equipement
The cooling coil can either be installed in the supply air duct or
in the return air duct. If the coil is installed in the supply air duct,
it must be at a minimum of 6" over the furnace’s primary heat
exchanger. This will avoid potential error codes due to heated
refrigerant when the gas furnace is on. It also allows for a more
laminar airflow through the coil. The cooling coil base can be
purchased through your local distributor. See table 26 for the
appropriate item number.
Table 2 – Minimum clearance
Position Clearance in (mm)
Rear 0
Front124 (610)
All sides of supply plenum 21 (25)
Sides30
Vent 0
Top of furnace 1 (25)
1- For servicing or cleaning, a 24" front clearance is required.
2- For at least the first 3 ft of plenum from furnace
3-Unit connections (electrical, drain trap and combustion
air) may necessitate greater clearances than the minimum
clearances listed above.
8

3 INSTALLATION
To ensure proper drainage of the condensate when
installed in position other than upflow, the furnace MUST
be tilted. Refer to figures corresponding to the position of
the furnace in the following sections.
CAUTION
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in water spillage
and/or property damage.
For any position other than upflow, the multiposition
pressure switch must be connected pneumatically to
the condensate box and electrically to the control to
allow the furnace to stop in the event of drain blockage.
3.1 UPFLOW
The furnace is factory built for upflow position. In this position,
the drain trap can be installed on the right or left side depending
on air return duct. When installing the furnace in the upflow
position, make sure it is leveled or tilted foward.
In the upflow orientation, the drain trap can be installed to the
right or to the left of the furnace. The location of the drain
trap is dependent of the return duct connection. The furnace
must be perfectly leveled or slightly leaned forward to help drain
condensate.
3.1.1 Right side condensate drain trap
connection
Figure 1 – Right side connection
See figure 1 and read the following instructions:
1. Remove the oblong knock-out from the right side of the
casing.
2. Place the drain trap gasket on drain trap.
3. Install the drain trap on the right side. See figure 1.
4. Screw in place the drain trap with two head tapping
screws on the right side of the furnace.
5. Connect the three stubs to the condensate tubings
already in place in the furnace.
6. Connect the outlet drain from the drain trap to an
additional condensate tubing using a ½” tee for an
adequate drainage of the condensate. DO NOT vent
using the remaining 3 outlet stubs.
7. Prime the drain trap with water. This will ensure
proper furnace drainage at startup and will avoid any
recirculation of flue gas.
8. On the remaining 3 outlet stub, connect caps (1x5/8” and
2x1/2”). Those caps are furnished in the parts bag.
9. If a condensate pump needs to be use, make sure it is
suited for acidic condensate.
3.1.2 Left side condensate drain trap
connection
See figure 2 and read the following instructions:
Figure 2 – Left side connection
1. Remove the oblong knock-out from the left side of the
casing.
2. Place the drain trap gasket on the drain trap.
3. Install the drain trap on the left side, the three outlet stub
of the drain trap toward the interior of the furnace.
4. Connect each condensate tubing to a stub. Use the
furnished ½” and 5/8” tubing to cut the appropriate length
9