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Specifications are subject to change without notice.
22
441 01 1422 00
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-
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 AMP and NEUTRAL. The terminals are
rated for 115 VAC, 1.0 amps maximum and are energized
during blower motor operation. (See Fig. 24)
2. Humidifier (HUM 24VAC and HUM)
S
a. HUM 24VAC: Connect an accessory 24 VAC, 0.5
amp maximum humidifier (if used) to the 1/4
−
in male
quick
−
connect HUM 24VAC terminal and C screw
terminal on the control board thermostat strip. The
HUM 24VAC terminal is energized when there is a call
for heat (W) and the pressure switch (PRS) closes. (See
S
b. HUM: Connect an accessory 115VAC (EAC and
HUM are 1 amp maximum combined) humidifier (if
used) to the
¼
−
inch male quick connect HUM terminal
and NEUTRAL
¼
−
inch quick connect. The HUM ter-
minal is energized when the inducer motor is energized
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 24VAC
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.
L15F001
J2 JUMPER
HEAT
OFF
ï
DELAY
TWINNING AND/OR
COMPONENT TEST
TERMINAL
HUMIDIFIER TERMINAL
(24
ï
VAC 0.5 AMP MAX)
TRANSFORMER 24
ï
VAC
CONNECTIONS
P1
ï
LOW VOLTAGE MAIN
HARNESS CONNECTOR
EAC TERMINAL
(115 VAC 1.0 AMP MAX.)
P2
HOT SURFACE IGNITOR (HSI)
& INDUCER MOTOR (IND)
CONNECTOR
HUMIDIFIER
TERMINAL
115
ï
VAC
115 VAC
(L1) LINE VOLTAGE
CONNECTION
115
ï
VAC (L2) NEUTRAL
CONNECTIONS
LED OPERATION &
DIAGNOSTIC LIGHT
BLOWER SPEED
SELECTION TERMINALS
24
ï
V THERMOSTAT
TERMINALS
3
ï
AMP FUSE
IND HSI
115 VAC
TRANSFORMER
PRIMARY
115 VAC
BLOWER
POWER (BL
ï
1)
CONNECTION
Fig. 24
−
Furnace Control