International comfort products A Series Installation Instructions Manual page 27

9. Connect field power and neutral leads to furnace power
leads inside the external electrical box (Fig. 34).
Power Cord Installation in Furnace J- - Box
NOTE:
Power cords must be able to handle the electrical
requirements (Table 13). Refer to power cord manufacturer's
listings.
1. Install J- -Box mounting bracket to inside of furnace casing
(Fig. 38).
2. Route listed power cord through 7/8- -in. (22 mm) diameter
hole in casing and J- -Box bracket.
3. Secure power cord to J- -Box bracket with a strain relief
bushing or a connector approved for the type of cord used.
4. Pull furnace power wires through 1/2- -in. (12 mm) diameter
hole in J- -Box. If necessary, loosen power wires from
strain—relief wire- -tie on furnace wiring harness.
5. Connect field ground wire and factory ground wire to green
ground screw on J- -Box mounting bracket (Fig. 38).
6. Connect power cord power and neutral leads to furnace
power leads (Fig. 40).
7. Attach furnace J- -Box cover to mounting bracket with
screws supplied in loose parts bag. Do not pinch wires
between cover and bracket (Fig. 38).
BX Cable Installation in Furnace J- - Box
1. Install J- -Box mounting bracket to inside of furnace casing
(Fig. 38).
2. Route BX connector through 7/8- -in. (22 mm) diameter
hole in casing and J- -Box bracket.
3. Secure BX cable to J- -Box bracket with connectors ap-
proved for the type of cable used.
4. Connect field ground wire and factory ground wire to green
ground screw on J- -Box mounting bracket (Fig. 38).
5. Connect field power and neutral leads to furnace power
leads (Fig. 40).
6. Attach furnace J- -Box cover to mounting bracket with
screws supplied in loose parts bag. Do not pinch wires
between cover and bracket.
WARNING
!
FIRE, EXPLOSION, ELECTRICAL SHOCK, AND
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in dangerous
operation, personal injury, death, or property damage.
Do not drill into blower shelf of furnace to route control
wiring. Route any control or accessory wiring to the blower
compartment through external knockouts on the casing.
440 01 4601 01
24- -V Wiring
Make field 24- -v connections at the 24- -v terminal strip. (Fig. 41)
Connect terminal Y (Fig. 68) for proper cooling operation. Use only
AWG No. 18, color- -coded, copper thermostat wire.
ACCESSORIES
1. Electronic Air Cleaner (EAC)
Connect an accessory Electronic Air Cleaner (if used) using
1/4- -in female quick connect terminals to the two male 1/4- -in
quick- -connect terminals on the control board marked EAC
and NEUTRAL. The terminals are rated for 115 VAC, 1.0
amps maximum and are energized during blower motor opera-
tion.
2. Humidifier (HUM)
Connect an accessory 115 VAC, 1 amp. maximum humidifier
(if used) to the 1/4- -in male quick- -connect HUM terminal and
NEUTRAL 1/4- -in quick connect. The HUM terminal is ener-
gized when the blower starts during a call for heat.
NOTE: A field- -supplied, 115- -v controlled relay connected to
EAC terminals may be added if humidifier operation is desired
during blower operation.
NOTE: DO NOT connect furnace control HUM 115VAC terminal
to H (humidifier) terminal on humidity sensing thermostat, or
similar device. See humidity sensing thermostat, thermostat, or
controller manufacturer's instructions for proper connection.
NOTE: Use AWG No. 18 color-coded copper thermostat wire for
lengths up to 100 ft. (31 M). For wire lengths over 100 ft., use
AWG No. 16 wire.
The 24- -v circuit contains an automotive- -type, 3- -amp. fuse located
on the control. Any direct shorts during installation, service, or
maintenance could cause this fuse to blow. If fuse replacement is
required, use ONLY a 3- -amp. fuse of identical size (Fig. 41).
Alternate Power Supplies
This furnace is designed to operate on utility generated power
which has a smooth sinusoidal waveform. If the furnace is to be
operated on a generator or other alternate power supply, the
alternate power supply must produce a smooth sinusoidal
waveform for compatibility with the furnace electronics. The
alternate power supply must generate the same voltage, phase, and
frequency (Hz) (Table 13) or the furnace rating plate.
Power from an alternate power supply that is non-sinusoidal may
damage the furnace electronics or cause erratic operation.
Contact the alternate power supply manufacturer for specifications
and details.
Specifications subject to change without notice.
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