WIRING
Using the DIP Switches (HE150/HE250/HE300 only)
Two features are configured by DIP settings, which are described inside the humidifier cover.
STEP THREE:
Understand the DIP Switches
DIP 1 (Top):
This switch looks for inputs from the
HVAC system before allowing humidity. Set to the left,
the humidifier will look for input(s). Set to the right, it
will not.
DIP 2 (Bottom):
This switch controls the fan. Set to
the left, the HVAC system controls the fan. Set to the
right, the humidifier will force the fan on when there is
a call for humidity.
STEP FOUR:
Install the Transformer (Bypass Models Only)
Install transformer on the outside of a grounded metal junction box using only a 7/8 in. (22 mm) knockout hole.
Place mounting tabs into the knockout hole and firmly tighten the locking screw. Field wiring connections and
grounding means for the transformer and enclosure shall be in accordance with the National Electrical Code
(NEC) and the Canadian Electrical Code (CEC). Connect wires to the 120V side of the transformer.
For HE150 and HE250, the 15V transformer must provide constant power to the 24V IN terminals.
STEP FIVE:
Wiring the Humidifier
Use a wiring diagram from the following pages that matches your equipment.
When wiring is complete, run the wires coming out of the humidifier into the wiring clip on the bottom of the
humidifier.
MCR29882
Humidifier 69-2413EF—01
16
