Filters must be installed in either the central return register or in
the return air ductwork.
Make Electrical Connections
To avoid the risk of electrical shock, wiring to the unit
must be polarized and grounded.
Disconnect ALL power before servicing.
Multiple power sources may be present.
Failure to do so may cause property damage,
personal injury or death.
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dangerous
operation. Verify proper operation after servicing.
The wiring harness is an integral part of this furnace. Field
alteration to comply with electrical codes should not be required.
Wires are color coded for identification purposes. Refer to the
wiring diagram for wire routings. If any of the original wire as
supplied with the furnace must be replaced, it must be replaced
with wiring material having a temperature rating of at least 105°C.
Any replacement wiring must be a copper conductor.
115-Volt Line Connections
Before proceeding with electrical connections, check that the
supply voltage, frequency and phase correspond to that
specified on the unit rating plate. Power supply to the furnace
must be NEC Class 1, and must comply with all applicable
codes. The furnace must be electrically grounded in accordance
with local codes or, in their absence, with the latest edition of The
National Electric Code, ANSI NFPA 70 and/or The Canadian
Electric Code CSA C22.1.
Use a separate fused branch electrical circuit containing properly
sized wire and a fuse or circuit breaker. The fuse or circuit breaker
must be sized in accordance with the maximum overcurrent
protection specified on the unit rating plate. An electrical
disconnect must be provided at the furnace location.
Line voltage wiring must enter into the junction box provided with
NOTE: Line polarity must be observed when making field
Install a room thermostat according to the instructions furnished
with it. Select a location on an inside wall that is not subject to
drafts, direct sunshine or other heat sources.
Make the low voltage thermostat connections to the ignition
control board as indicated on the Wiring Connection Diagram in
1. Disconnect power.
2. Remove the screw from the furnace electrical connection
3. Remove the cover from the furnace electrical connection box.
4. Route the field supply wires to the furnace electrical
5. Using UL-listed wire connectors, connect the field supply
wires to the furnace (black to black and white to white).
To avoid the risk of injury, electrical shock
or death, the furnace must be electrically
grounded in accordance with local codes or
in their absence, with the latest edition of the
National Electric Code (NEC).
Fossil Fuel Applications
This furnace can be used in conjunction with a heat pump in a
fossil fuel application. A fossil fuel application refers to a
combined gas furnace and heat pump installation which uses an
outdoor temperature sensor to determine the most cost efficient
means of heating (heat pump, gas furnace, or both).
A heat pump thermostat with 2 stages of heat is required to
properly use a furnace in conjunction with a heat pump. Refer to
the fossil fuel kit installation instructions for additional thermostat
Strictly follow the wiring guidelines in the fossil fuel kit installation
instructions. All furnace connections must be made to the
furnace integrated control module and the furnace terminal strip
on the fossil fuel control board.