Heat Pump Wiring - Aprilaire Premium Digital Humidifier Control Safety And Installation Instructions Manual

HEAT PUMP WIRING (FIGURE N)
This configuration allows the humidifier to run whenever the
heat pump blower is running (and the Humidifier Control is
calling for humidity). The humidifier solenoid should be plumbed
to hot water for this option.
Figure N
DIGITAL HUMIDIFIER CONTROL TERMINAL STRIP
R C
24 VAC
TRANSFORMER
OUTDOOR TEMPERATURE
SENSOR OR MANUAL
MODE RESISTOR
A B ODT W/G Cf H
HEAT PUMP
TERMINAL
STRIP
18
USING MODEL 50 CURRENT SENSING RELAY TO DETECT
FURNACE BLOWER OPERATION (FIGURE P)
This option is to be used only if the furnace terminals or
accessory terminals are not used.
NOTE: The Water Panel Change Indicator must be set to the
"OFF" position for this option.
Figure P
TRANSFORMER
FURNACE
BLOWER
90-1225
DIGITAL HUMIDIFIER CONTROL TERMINAL STRIP
R C A B ODT W/G
24 VAC
OUTDOOR TEMPERATURE
SENSOR OR MANUAL
MODE RESISTOR
COMMON
19
Cf H
MODEL 50
90-1222