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H46D HUMIDITY CONTROLLER
FAN
CONTROLLER
TEMPERATURE
RISE
FAN MOTOR
L1
(HOT)
L2
POWER
1
SUPPLY
1
PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
Fig. 2. Typical wiring diagram for H46D single-speed
fan motor.
FAN CONTROL
L4068
FAN MOTOR
LO
HI
C
1
PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
2
TO ENSURE HUMIDIFIER OPERATION
IN WINTER WHEN THERMOSTAT
SUBBASE FAN SWITCH IS AT ON OR
AUTO, ADD SAIL SWITCH TO SYSTEM
AS SHOWN.
3
TO PREVENT HUMIDIFIER OPERATION
IN SUMMER, TURN H46D KNOB
TO OFF POSITION.
Fig. 3. Typical wiring diagram for H46D in forced air
system with 2-speed fan motor.
Home and Building Control
Honeywell Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
69-1001B
69-1001B J.S. 4-96 Printed in Taiwan R.O.C
H46D
CONTROLLER
HUMIDITY
FALL
HUMIDIFIER
M7910
COOLING
L1 (HOT)
RELAY R8230
POWER
SUPPLY
1
2
SAIL
SWITCH
S688A
3
HUMIDITY
H46D
FALL
HUMIDITY
CONTROL
HUMIDIFIER
MOTOR
M7911
Home and Building Control
Honeywell Limited-Honeywell Limitée
155 Gordon Baker Road
North York, Ontario
M2H 2C9
H46D
HUMIDITY
FALL
T
T
TRANSFORMER
JUMPER
REMOVED
2
1
FAN
CONTROL
L1
(HOT)
L2
L2
POWER
1
SUPPLY
PROVIDE DISCONNECT MEANS AND OVERLOAD
1
PROTECTION AS REQUIRED.
Fig. 4. Typical wiring diagram for H46D with a
SETTING AND ADJUSTMENT
The H46 makes contact on a relative humidity fall to the
set point to start the humidifier. On an increase in relative
humidity to the set point (plus the differential), the switch
breaks contact to stop the humidifier. Turn the knob
clockwise to the setting stop to place the H46 in the ON
position. Turn the knob counterclockwise to the setting
stop to place the H46 in the OFF position.
CHECKOUT
After all mounting and wlring is completed, turn on the
power supply. Place the system into operation by turning
the setting knob toward the high end of the scale until the
humidifier motor starts (on central unit humidifier systems,
the furnace fan must be running before the humidifier
starts). Turn the setting knob slowly toward the low end of
the scale until the humidifier motor stops.
2
RA89A RELAY
RELAY
4
3
FAN
HUMIDIFIER
MOTOR
L1
(HOT)
L2
POWER
1
SUPPLY
switching relay.
Helping You Control Your World
www.honeywell.com/yourhome.
M7912
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