V Wiring - Bryant 140/E series Installation, Start-Up, Operating And Service And Maintenance Instructions

4. Secure field ground wire to green ground screw on J- -Box
bracket.
5. Connect line voltage leads as shown in Fig. 25.
6. Reinstall cover to J- -Box. Do not pinch wires between
cover and bracket.

24- -V WIRING

Make field 24- -v connections at the 24- -v terminal strip. (See Fig.
23.) Connect terminal Y/Y2 as shown in Fig. 24 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) us-
BLOWER OFF-DELAY
24-V THERMOSTAT
TERMINALS
3-AMP FUSE
LED OPERATION &
DIAGNOSTIC LIGHT
115-VAC(L2)NEUTRAL
CONNECTIONS
COOL
HEAT
SPARE-1
BLOWER SPEED
SELECTION TERMINALS
TWINNING AND/OR
COMPONENT TEST
TERMINAL
BLOWER OFF-DELAY
TEST/TWIN
HUM
0.5 AMP@24VAC
FUSE 3-AMP
SEC-2 SEC-1
EAC-2 L2
1-AMP@
FAN
SPARE-1 SPARE-2 PR-1
EAC-1
115VAC
SPARE-2 FAN
VOLTAGE CONNECTION
EAC-1 TERMINAL
(115-VAC 1.0 AMP MAX.)
Fig. 24 - - Furnace Control
ing 1/4- -in female quick connect terminals to the two male
1/4- -in quick- -connect terminals on the control board
marked EAC- -1 and EAC- -2. The terminals are rated for
115 VAC, 1.0 amps maximum and are energized during
blower motor operation. (See Fig. 24.)
2. Humidifier (HUM)
Connect an accessory 24 VAC, 0.5 amp. maximum hu-
midifier (if used) to the 1/4- -in male quick- -connect HUM
terminal and COM- -24V screw terminal on the control
board thermostat strip. The HUM terminal is energized
when gas valve relay (GVR) is energized. (See Fig. 24.)
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 terminal to
HUM (humidifier) terminal on Thermidistatt, Zone Controller
or similar device. See Thermidistat, Zone Controller, thermostat,
or controller manufacturer's instructions for proper connection.
PL2 1
115 VAC (L1) LINE
24
HUMIDIFIER TERMINAL
(24-VAC 0.5 AMP MAX.)
TRANSFORMER 24-VAC
CONNECTIONS
PL1-LOW VOLTAGE MAIN
HARNESS CONNECTOR
PL2-HOT SURFACE
IGNITER & INDUCER
MOTOR CONNECTOR
A02142