protech HC-TST412MDMS Series - Page 4

4
WIRING DIAGRAM
Figure 5 – Two Stage
THERMOSTAT MODEL: (-)HC-TST412MDMS
REMOTE SENSOR: F145-1378 (OUTDOOR), F145-1328 (INDOOR)
V
DHM
ODD
HOT
NEUTRAL
120 VAC
24 VAC
Relay
90-290Q
or equivalent
HOT
NEUTRAL
120 VAC
TRANSFORMER
R
HM
Humidifier
System
HOT
NEUTRAL
120 VAC
TRANSFORMER
HM
24 VAC
Humidifier
System
R
Figure 6 – Typical Wiring for 120V Humidifi er System
Figure 7 – Typical Wiring for 24V Humidifi er System
(Refer to furnace instructions for humidity information)