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IMPORTANT:
The furnace must be installed so that the
electrical components are protected from water (conden-
sate).
Before proceeding with the electrical connections, be cer-
tain that the voltage, frequency and phase corresponds to
that specified on the furnace rating plate. For single fur-
nace application, see rating plate for maximum over-cur-
rent protection.
Use a separate fused branch electrical circuit containing a
properly sized fuse or circuit breaker. Run this circuit di-
rectly from the main switch box to an electrical disconnect
that is readily accessible and located near the furnace (as
required by code). Connect from the electrical disconnect
to the junction box on the left side of the furnace, inside
the blower compartment. For the proper connection, refer
to the appropriate wiring diagram located on the inside
cover of the furnace control box and in these instructions.
ANSI/NFPA70 or, in Canada, The Canadian Electrical
Code and local codes having jurisdiction.
These may be obtained from:
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
CSA - International
5060 Spectrum Way
Mississauga, Ontario
Canada L4W 5N6
online: www.csa.ca
REVERSING THE ELECTRICAL
CONNECTION (JUNCTION BOX)
NOTE:
The electrical junction box may be moved to the
right side if necessary. A knockout is provided. Seal the
opposite hole with plug provided.
NOTE:
L1 (hot) and L2 (neutral) polarity must be ob-
served when making field connections to the furnace. The
ignition control may not sense flame if L1 and L2 are re-
versed. Make all electrical connections in accordance with
the latest edition of the National Electrical Codes.
If the line voltage electrical needs to be moved to the op-
posite side of the furnace, the following steps should be
taken:
1. The furnace must NOT be electrically connected to
line voltage prior to reversing the electrical connection.
2. Disconnect the wires from the door switch. When un-
mating wire terminal from ¼” spade terminal, grasp
the terminal from the housing with fingers and pull
straight against ¼” spade terminal without prying. See
Figure 44. Take caution not to disconnect the terminal
by pulling on the wire itself to prevent contact defor-
mation or damage. Deformation of contact may cause
defective contact.
3. Remove the junction box from the furnace cabinet wall
by removing the two screws that hold it to the cabinet.
Leave the wires connected to the junction box.
ELECTRICAL WIRING
ELECTRICAL WIRING
FIGURE 44
DOOR SWITCH REMOVAL INSTRUCTIONS
!
WARNING
TURN OFF ELECTRIC POWER AT FUSE BOX OR
SERVICE PANEL BEFORE MAKING ANY ELECTRI-
CAL CONNECTIONS. FAILURE TO DO SO CAN
CAUSE ELECTRICAL SHOCK RESULTING IN PER-
SONAL INJURY OR DEATH.
!
WARNING
THE CABINET MUST HAVE AN UNINTERRUPTED
GROUND ACCORDING TO THE LATEST EDITION
OF THE NATIONAL ELECTRICAL CODE,
ANSI/NFPA70- OR IN CANADA, THE CANADIAN
ELECTRICAL CODE, CSA-C221 OR LOCAL CODES
THAT APPLY. DO NOT USE GAS PIPING AS AN
ELECTRICAL GROUND. A GROUND SCREW IS
PROVIDED IN THE JUNCTION BOX. FAILURE TO DO
SO CAN CAUSE ELECTRICAL SHOCK RESULTING
IN PERSONAL INJURY OR DEATH.
!
WARNING
THIS FURNACE IS EQUIPPED WITH A BLOWER
DOOR SAFETY SWITCH. DO NOT DISABLE THIS
SWITCH. FAILURE TO FOLLOW THIS WARNING
CAN RESULT IN ELECTRICAL SHOCK, PERSONAL
INJURY OR DEATH.
ST-A1194-91-00
