Humidifier Connection; Bypass Humidifier; Communicating Furnace; Furnace And Bypass Humidifier - Johnson Controls Hx 3 S1-THXU430W Installation Manual

5407934-UIM-C-1119

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.
Do Not Use a traditional humidistat to control humidifier operation. If a
humidifier is installed, the thermostat can operate the humidifier.

Bypass Humidifier

Communicating Furnace

Hx3
THERMOSTAT
A+
R
C
B -
B-
A0618-003
FIGURE 17: Furnace and Bypass Humidifier
Johnson Controls Ducted Systems
NOTICE
FURNACE
COMMUNICATING
CONTROL
A+
R
C
B-
R
G
Y/Y2
Y1
W2
W1
O
HUM
X/L
COM
HUM OUT
HOT
120
VAC
NEUTRAL
AC/HP
COMMUNICATING
CONTROL
A+
R
C
B-
TRANSFORMER
(120 VAC to 24 VAC)
HUM OUT
BYPASS
HUMIDIFIER
24 VAC
25