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5. Secure the wallplate. Secure the wallplate to the duct with sheet metal screws (provided).
6. Run wires through the back plate. Run wires through the top or bottom channel on the back plate when
ductmounted. If installing like a thermostat on a wall, run the wires through the back.
WIRING
CAUTION
Hazardous Voltage.
Can cause personal injury or equipment damage.
Disconnect power supply before installing or servicing equipment.
IMPORTANT
All wiring must comply with applicable local code, ordinances and regulations.
Wire the humidifier solenoid valve, humidistat and transformer. See Fig. 18.
Fig. 16.
C
R
U
U
S
S
Fig. 17.
TRANSFORMER
5
HUMIDIFIER
SOLENOID
RED WIRE
RED WIRE
WHITE WIRE
VALVE
WHITE
WIRE
RED WIRE
WHITE
WIRE
RED WIRE
1 WIRE OUTDOOR SENSOR TO THE S TERMINALS.
2
USE A SHORT WIRE TO CONNECT R TO THE UPPER
U AS SHOWN.
Fig. 18. Wiring the controls and the HE240.
M34582B
RUN WIRES
THROUGH THE
TOP OR BOTTOM
CHANNEL
M34610B
WHITE WIRE
C
RED WIRE
24 VAC (CONSTANT)
R
2
U
U
S
OUTDOOR SENSOR
1
S
11
HE240, HE280 HUMIDIFIER
M39013
69-2685ES—07
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