Communicating Air Handler; Air Handler And Bypass Humidifier - Johnson Controls Hx 3 S1-THXU430W Installation Manual

5407934-UIM-C-1119
Furnace or air handler humidifier terminals can be used to power a
control relay if using a humidifier of the steam type. Line voltage power
for a steam humidifier MUST be provided from an alternate power
supply.

Communicating Air Handler

Hx3 THERMOSTAT
A+
R
C
B -
B-
FIGURE 18: Air Handler and Bypass Humidifier
26
NOTICE
AIR HANDLER
COMMUNICATING
CONTROL
A+
R
C
B-
R
G
Y/Y2
Y1
W2
W1
O
HUM
X/L
COM
HUM OUT
HUM
HUM
AC/HP
COMMUNICATING
CONTROL
A+
R
C
B-
BYPASS
HUMIDIFIER
R
C
Johnson Controls Ducted Systems
A1248-001