Table of Contents
Advertisement
XI. ELECTRICAL CONNECTIONS
T
O AVOID THE RISK OF ELECTRICAL SHOCK, WIRING TO THE UNIT MUST BE
POLARIZED AND GROUNDED.
T
O AVOID INJURY, ELECTRICAL SHOCK OR DEATH, DISCONNECT ELECTRICAL
POWER BEFORE SERVICING OR CHANGING ANY ELECTRICAL WIRING.
L
ABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING CONTROLS.
W
IRING ERRORS CAN CAUSE IMPROPER AND DANGEROUS OPERATION.
V
ERIFY PROPER OPERATION AFTER SERVICING.
W
H
IRING
ARNESS
The wiring harness is an integral part of this furnace. Field alter-
ation 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 re-
placement wiring must be copper conductor.
115 V
L
C
OLT
INE
ONNECTIONS
Before proceeding with electrical connections, ensure that the sup-
ply voltage, frequency, and phase correspond to that specified on
the unit rating plate. Power supply to the furnace must be N.E.C.
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 fuse or circuit breaker. The fuse or circuit breaker
must be sized in accordance with the maximum overcurrent pro-
tection specified on the unit rating plate. An electrical disconnect
must be provided at the furnace location.
NOTE: Line polarity must be observed when making field
connections.
Connect hot, neutral, and ground wires as shown in the wiring
diagram located on the unit's blower door. For direct vent applica-
tions, the cabinet opening to the junction box must be sealed air
tight using either a UL approved bushing such as Heyco Liquid
Tight or by applying a UL approved non-reactive sealant to bush-
ing.
Line polarity must be observed when making field connections.
Line voltage connections can be made through either the right or
left side panel. The furnace is shipped configured for a left side
electrical connection with the junction box located inside the burner
compartment. To make electrical connections through the oppo-
site side of the furnace, the junction box must be relocated to the
other side of the burner compartment prior to making electrical
connections. To relocate the junction box, follow the steps shown
below.
WARNING
WARNING
CAUTION
NOTE: Wire routing must not to interfere with circulator blower
operation, filter removal, or routine maintenance.
E
DGES OF SHEET METAL HOLES MAY BE SHARP.
PRECAUTION WHEN REMOVING HOLE PLUGS.
1. Remove the burner compartment door.
2. Remove and save the two screws securing the junction box
to the side panel.
3. Relocate junction box and associated plugs and grommets
to opposite side panel. Secure with screws removed in
step 2.
STANDARD
JUNCTION BOX
LOCATION
Junction Box Relocation
T
O 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
C
ODE.
To ensure proper unit grounding, the ground wire should run from
the furnace ground screw located inside the furnace junction box
all the way back to the electrical panel. NOTE: Do not use gas
piping as an electrical ground. To confirm proper unit grounding,
turn off the electrical power and perform the following check.
1. Measure resistance between the neutral (white) connection
and one of the burners.
2. Resistance should measure 10 ohms or less.
This furnace is equipped with a blower door interlock switch which
interrupts unit voltage when the blower door is opened for servic-
ing. Do not defeat this switch.
21
CAUTION
U
SE GLOVES AS A
ALTERNATE
JUNCTION BOX
LOCATION
WARNING
N
E
ATIONAL
LECTRIC
Hide quick links:
Advertisement
Table of Contents
Troubleshooting
