Electrical Connections - International comfort products A Series Installation Instructions Manual

ELECTRICAL CONNECTIONS

WARNING
!
ELECTRICAL SHOCK, FIRE OR EXPLOSION
HAZARD
Failure to follow safety warnings could result in
dangerous operation, serious injury, death or property
damage.
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
disconnection. Reconnect wires correctly.
- - Verify proper operation after servicing.
- - Always reinstall access doors after completing service
and maintenance.
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Blower door switch opens 115- -v power to control. No
component operation can occur. Do not bypass or close
switch with blower door removed.
Field wiring diagram showing typical field 115- -V wiring (Fig.
40). Check all factory and field electrical connections for tightness.
Field- -supplied wiring shall conform with the limitations of 63_F
(35_C) rise.
WARNING
!
ELECTRICAL SHOCK AND FIRE HAZARD
Failure to follow this warning could result in personal
injury, death, or property damage.
The cabinet MUST have an uninterrupted or unbroken
ground according to NEC NFPA 70 or local codes to
minimize personal injury if an electrical fault should occur.
This may consist of electrical wire, conduit approved for
electrical ground or a listed, grounded power cord (where
permitted by local code) when installed in accordance with
existing electrical codes. Refer to the power cord
manufacturer's ratings for proper wire gauge. Do not use
gas piping as an electrical ground.
CAUTION
!
FURNACE MAY NOT OPERATE HAZARD
Failure to follow this caution may result in intermittent
furnace operation.
Furnace control must be grounded for proper operation or
else control will lock out. Control must remain grounded
through green/yellow wire routed to gas valve and manifold
bracket screw.
440 01 4601 01
115- -V Wiring
Furnace must have a 115-v power supply properly connected and
grounded.
NOTE: Proper polarity must be maintained for 115-v wiring. If
polarity is incorrect, control LED status indicator light will flash
rapidly and furnace will NOT operate.
Verify that the voltage, frequency, and phase correspond to that
specified on unit rating plate. Also, check to be sure that service
provided by utility is sufficient to handle load imposed by this
equipment. Refer to rating plate or equipment electrical
specifications (Table 13).
U.S.A. Installations: Make all electrical connections in accordance
with the current edition of the National Electrical Code (NEC)
NFPA 70 and any local codes or ordinances that might apply.
FIRE HAZARD
Failure to follow this warning could result in personal
injury, death, or property damage.
Do not connect aluminum wire between disconnect
switch and furnace. Use only copper wire (Fig. 39).
Use a separate, fused branch electrical circuit with a properly sized
fuse or circuit breaker for this furnace. For wire size and fuse
specifications (Table 13). A readily accessible means of electrical
disconnect must be located within sight of the furnace
J- -Box Installation
FIRE OR ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury, death, or property damage.
High voltage field connections must be located in J- -Box
with furnace, or in field supplied external disconnect
mounted to furnace.
If field- -supplied manual disconnect switch is to be mounted
on furnace casing side, select a location where a drill or
fastener cannot damage electrical or gas components.
The J- -Box must be used when field line voltage electrical
connections are made to the furnace wiring harness inside the
furnace casing. The J- -Box cover is not required if a field- -supplied
external electrical box is attached to the outside of the furnace
casing. The field ground wire and furnace main ground wire are
grounded when the J- -Box bracket is attached to the furnace and
the field ground wire and factory ground wire are secured to the
bracket grounding screw. If the J- -Box cover is not used, the field
and factory spliced connections must be located inside the external
electrical box. Do not leave splice connections unprotected inside
the furnace.
The J- -Box cover, mounting bracket and screws are shipped in the
loose parts bag included with the furnace. J- -Box mounting
locations (Fig. 38).
The J- -Box mounting bracket and green ground screw is used as a
grounding point for all line voltage wiring options. The J- -Box
cover may be omitted when electrical connections are made inside
an external electrical box mounted external to the casing.
Specifications subject to change without notice.
! WARNING
WARNING
!
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