Wiring HumidiPRO to FORCE FAN ON (Basic Humidifier)
R
C
W
Y
G
NOTES: USE DPST RELAY FOR HUMIDITY ON DEMAND
C
R
U
U
S
S
DPST RELAY
3
1
2
4
6
5
WITH A BASIC HUMIDIFIER.
HUMIDIFIER MUST BE PLUMBED TO HOT WATER
WHEN FORCING FAN.
HUMIDIFIERS THAT HAVE GT AND GF TERMINALS DO NOT
REQUIRE A RELAY TO FORCE FAN.
DO NOT USE A RELAY IF THE THERMOSTAT HAS A MECHANICAL
FAN AUTO/ON SLIDER SWITCH.
HUMIDIFIER
24 VAC (CONSTANT)
OUTDOOR SENSOR
12
1
L2
L1
(HOT)
M34574A