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W
H
IRING
ARNESS
The wiring harness is an integral part of this furnace. Field
alteration to comply with electrical codes should not be re-
quired. Wires are color coded for identification purposes. Re-
fer 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 con-
ductor.
115 V
L
C
OLT
INE
ONNECTIONS
Before proceeding with electrical connections, ensure that the
supply voltage, frequency, and phase correspond to that speci-
fied 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 prop-
erly sized wire, and fuse or circuit breaker. The fuse or circuit
breaker must be sized in accordance with the maximum over-
current protection specified on the unit rating plate. An electri-
cal disconnect must be provided at the furnace location.
Line voltage wiring must enter into the junction box provided
with the furnace.
NOTE: Line polarity must be observed when making field
connections.
F
F
A
OSSIL
UEL
PPLICATIONS
This furnace can be used in conjunction with a heat pump in a
fossil fuel application. A fossil fuel application refers to a com-
bined gas furnace and heat pump installation which uses an
outdoor temperature sensor to determine the most cost effi-
cient means of heating (heat pump, gas furnace, or both).
A heat pump thermostat with two 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 ther-
mostat requirements.
Strictly follow the wiring guidelines in the fossil fuel kit installa-
tion instructions. All furnace connections must be made to the
furnace integrated control module and the FURNACE terminal
strip on the fossil fuel control board.
J
B
R
UNCTION
OX
ELOCATION
E
DGES OF SHEET METAL HOLES MAY BE SHARP
PRECAUTION WHEN REMOVING HOLE PLUGS
WARNING
. U
SE GLOVES AS A
.
Line voltage connections can be made through either the right
or left side panel. The furnace is shipped configured for a right
side electrical connection. To make electrical connections
through the opposite side of the furnace, the junction box must
be relocated to the left side prior to making electrical connec-
tions. To relocate the junction box, perform the following steps.
T
O PREVENT PERSONAL INJURY OR DEATH DUE TO ELECTRIC SHOCK
DISCONNECT ELECTRICAL POWER BEFORE INSTALLING OR SERVICING THIS
.
UNIT
1. Remove both doors from the furnace.
2. Remove and save the screws holding the junction box to
the right side of the furnace.
3. Models that have the junction box located in the burner
compartment will need to move the junction box directly
over.
4. Attach the junction box to the left side of the furnace,
using the screws removed in step 2.
5. Check the location of the wiring. Confirm that it will not
be damaged by heat from the burners or by the rotation
of the fan. Also confirm that wiring location will not
interfere with filter removal or other maintenance.
After the junction box is in the desired location, use washers to
connect field-supplied conduit to the junction box in accordance
with NEC and local codes. Connect hot, neutral, and ground
wires as shown in the furnace wiring diagram. The wires and
ground screw are located in the furnace junction box.
NOTE: In downflow applications the power leads should be
routed through the supplied wire tabs when rotating junction
box to the left side.
Low voltage wires may be connected to the terminal strip.
IMPORTANT NOTE: To avoid possible equipment malfunction,
route the low voltage wires to avoid interference with filter re-
moval or other maintenance.
HIGH VOLTAGE !
T
O AVOID THE RISK OF INJURY
,
DEATH
THE FURNACE MUST BE ELECTRICALLY
GROUNDED IN ACCORDANCE WITH LOCAL CODES OR IN
,
THEIR ABSENCE
WITH THE LATEST EDITION OF THE
N
E
C
ATIONAL
LECTRIC
ODE
17
WARNING
WARNING
,
ELECTRICAL SHOCK OR
.
,

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