Honeywell TrueSTEAM HM612A1000/U Installation Manual page 40

Installing the Humidistat
Duct-Mount Installation (continued)
5. Insert the duct tube.
Insert the duct tube through
the wallplate before securing
to the duct.
7. Run wires through the back plate.
C
R
U
U
S
S
Run wires through the top or bottom chan-
nel on the back plate when duct-mounted. If
installing like a thermostat on a wall, run the
wires through the back.
Wiring the Humidistat
This humidity control is wired the same
way a manual humidistat (H8908) is
wired. The only difference is that you also
wire in power (24 VAC) and an outdoor
sensor.
38
M34671
RUN WIRES
THROUGH THE
TOP OR BOTTOM
CHANNEL
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6. Secure the wallplate.
Secure the wallplate to the duct with
sheet metal screws (provided).
TERMINAL DESIGNATION
C 24 VAC POWER FROM EQUIPMENT
R 24 VAC POWER FROM EQUIPMENT
U HUMIDIFIER
U HUMIDIFIER
S OUTDOOR SENSOR
S OUTDOOR SENSOR
NOTES: C AND R MUST BE CONSTANT 24VAC! RECOMMENDED TO WIRE TO
FURNACE/AIR HANDLER CONTROL BOARD.
DO NOT WIRE C AND R TO HUMIDIFIER TRANSFORMER!
24 VAC (CONSTANT)
TO HUMIDIFIER
OUTDOOR
TEMPERATURE
SENSOR
Steam Humidifier System 69-2285—11
M34582
C
R
U
U
S
S
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