5
FEET
NO
NO
18"
MINIMUM
NO
Determine
location for
humidifier control
Do not mount humidifier control:
• In the flow of supply registers.
• Behind doors or in corners
• In direct light, near lighting fixtures, or other
appliances that give off heat.
• Outside or in unconditioned area.
90-1666
Humidifier
control wiring
WHT / YLW
WHT / BLU
YLW (C)
ORG (NO)
BLU (NC)
R
C
W
G
Y
Y
G
W
C
R
HUMIDISTAT
TERMINAL
THERMOSTAT FURNACE
REMOVE
HUMIDFIER
CONTROL
(OPTIONAL)
DUCT SENSOR
ODT
BLOWER
ACTIVATION RELAY
FAN PACK
24
IN
GND
1
2
7
8
12
13
14
1
2
3
4
4851
90-1992
7
8
3
