5407934-UIM-C-1119
Johnson Controls Ducted Systems 25
HUMIDIFIER CONNECTION
You can install a bypass or fan powered humidifier with the communicat-
ing system. Physically install the humidifier according to the instructions
included with the humidifier. For information on the wiring of the humidi-
fier, see the following figures.
Bypass Humidifier
Communicating Furnace
NOTICE
Do Not Use a traditional humidistat to control humidifier operation. If a
humidifier is installed, the thermostat can operate the humidifier.
FIGURE 17: Furnace and Bypass Humidifier
B-
C
B-
R
W1
O
X/L
R
G
Y1
COM
A+
C
B-
R
A+
C
B-
R
A+
HUM OUT
HOT
NEUTRAL
BYPASS
HUMIDIFIER
120
VAC
24 VAC
TRANSFORMER
(120 VAC to 24 VAC)
HUM OUT
A0618-003
FURNACE
COMMUNICATING
CONTROL
AC/HP
COMMUNICATING
CONTROL
Y/Y2
HUM
W2
Hx3
THERMOSTAT
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