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12. Complete electrical box wiring and installation. Connect
line voltage leads as shown in Fig. 24. Use best practices
(NEC in U.S. for wire bushings, strain relief, etc.)
13. Reinstall cover to J- -Box. Do not pinch wires between
cover and bracket.
POWER CORD INSTALLATION IN FURNACE J- -BOX
NOTE:
Power cords must be able to handle the electrical
requirements listed in Table 7. Refer to power cord
manufacturer's listings.
1. Remove cover from J- -Box.
2. Route listed power cord through 7/8- -in. (22 mm) diameter
hole in J- -Box.
3. Secure power cord to J- -Box bracket with a strain relief
bushing or a connector approved for the type of cord used.
4. Secure field ground wire to green ground screw on J- -Box
bracket.
5. Connect line voltage leads as shown in Fig. 24.
6. Reinstall cover to J- -Box. Do not pinch wires between
cover and bracket.
BX CABLE INSTALLATION IN FURNACE J- -BOX
1. Remove cover from J- -Box.
2. Route BX cable into 7/8- -inch diameter hole in J- -Box.
3. Secure BX cable to J- -Box bracket with connectors ap-
proved for the type of cable used.
4. Secure field ground wire to green ground screw on J- -Box
bracket.
5. Connect line voltage leads as shown in Fig. 24.
6. Reinstall cover to J- -Box. Do not pinch wires between
cover and bracket.
Fig. 22 - - Field- -Supplied Electrical Box on Furnace Casing
441 01 1501 04
24- -V WIRING
Make field 24- -v connections at the 24- -v terminal strip. (See Fig. 24)
Connect terminal Y as shown in Fig. 38 for proper cooling
operation. Use only AWG No. 18, color- -coded, copper thermostat
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.
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 op-
eration. (See Fig. 23)
2. Humidifier (HUM 115 VAC)
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 energized when the blower starts during a call for
heat. (See Fig. 23)
3. Humidifier (HUM 24 VAC)
Connect an accessory 24 VAC, 0.5 amp. maximum
humidifier (if used) to the 1/4- -in male quick- -connect HUM
24 VAC terminal and COM- -24V screw terminal on the
control board thermostat strip. The HUM 24 VAC terminal is
energized when the blower starts during a call for heat. (See
Fig. 23)
NOTE:
terminal or HUM 24 VAC 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.
A10141
Specifications are subject to change without notice.
DO NOT connect furnace control HUM 115 VAC
17
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