Electrical Connections - International comfort products R8MXL Installation Instructions Manual

Volts−
FURNACE
Hertz−
MODEL
Phase
0451412 115-60-1
0701712 115-60-1
0701716 115-60-1
0901714 115-60-1
0902116 115-60-1
1102120 115-60-1
1352420 115-60-1
* Permissible limits of the voltage range at which the unit operates satisfactorily.
# Unit ampacity = 125 percent of largest operating component's full load amps plus 100 percent of all other potential operating components' (EAC, humidifier,
etc.) full load amps.
{ Time−delay type is recommended.
} Length shown is as measured 1 way along wire path between unit and service panel for maximum 2 percent voltage drop.

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.
S
Before servicing, disconnect all electrical power
to furnace.
S
When servicing controls, label all wires prior to
disconnecting. Reconnect wires correctly.
S
Verify proper operation after servicing.
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Blower access panel door switch opens 115−v power to
control. No component operation can occur. Do not
bypass or close switch with panel removed.
See Figure 26 for field wiring diagram showing typical field
115−v wiring. Check all
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 70−2011 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.
441 01 6100 01
Table 7 – Electrical Data
Operating
Voltage* Range
Maxi- Mini-
Maximum
mum mum
Unit Amps
127 104
127 104
127 104
127 104
127 104
127 104
127 104
factory and field electrical
Specifications are subject to change without notice.
Unit
Ampacity#
5.6 7.8
5.6 7.8
10.0 13.3
8.2 11.0
8.2 11.0
13.4 17.4
10.7 14.0
!
FURNACE MAY NOT OPERATE
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.
115−V WIRING
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 Table 7 for
equipment electrical specifications.
Make all electrical connections in accordance with National
Electrical Code (NEC) NFPA 70−2011 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.
Use a separate, fused branch electrical circuit with a properly
sized fuse or circuit breaker for this furnace. See Table 7 for
wire size and fuse specifications. A readily accessible means
of electrical disconnect must be located within sight of the
furnace.
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.
J−BOX RELOCATION
NOTE: If factory location of J−Box is acceptable, go to next
section (ELECTRICAL CONNECTION TO J−BOX).
NOTE: On 14−in. (356 mm) wide casing models, the J−Box
shall not be relocated to other side of furnace casing when
the vent pipe is routed within the casing.
1. Remove and save two screws holding J−Box.
Minimum Maximum
Wire Size Wire Length‡
AWG ft (m)
14.0 47.0 (14.3)
14.0 47.0 (14.3)
14.0 27.0 (8.2)
14.0 33.0 (10.1)
14.0 33.0 (10.1)
12.0 33.0 (10.1)
14.0 26.0 (7.9)
CAUTION
WARNING
Maximum
Fuse or CKT
BKR† Amps
15.0
15.0
15.0
15.0
15.0
20.0
15.0
19