H46D,F Humidity Controllers
INSTALLATION INSTRUCTIONS
APPLICATION
The H46D,F Humidity Controllers are used with portable
and central unit humidifiers. The H46 has an spst, snap­
acting switch designed for line or low voltage circuits. The
H46D has two leadwires for switch box mounting. The
H46F has an electric cord with an interrupter plug.
INSTALLATION
8
9
Mounting H46F
1
2
3
When Installing this Product…
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazard­
ous condition.
2. Check the ratings given in the instructions and on
the product to make sure the product is suitable for
your application.
3. Installer must be a trained, experienced service
technician.
4. After installation is complete, check out product
operation as provided in these instructions.
CAUTION
Fasten the H46 to the adapter plate by tightening
the captive screw.
Replace the cover and the setting knob.
4
At the selected location, insert the two wood screws
(provided) into the wall 2 in. (51 mm) vertically apart
and protruding 1/16 in. (2 mm) from the wall. See
Fig. 2.
Position the H46 on the screws and slide it down
until the screws are in the slots.
Insert the humidifier plug into the end of the inter­
rupter plug. See Fig. 3.
Insert the interrupter plug into the electrical outlet.
NOTE: The H46F has a 3-prong plug. When connecting
to a 2-prong receptacle, use the converter plug
(not included) and connect the pigtail lead to the
ground screw.
ADAPTER PLATE
SCREWS (2)
2 X 3 IN.
SWITCH BOX
H46 CAPTIVE
MOUNTING SCREW
H46
(COVER OFF)
Disconnect power supply before connecting wiring
to avoid electrical shock or equipment damage.
Location
Select a location about 5 ft (1.5 m) above the floor in an
area with good circulation at average temperature and
humidity for the area to be controlled. Avoid locations near
hot or cold air ducts and discharged air from the controlled
equipment.
Mounting H46D
1
2
3
Remove the setting knob.
Pull the cover forward from the device to remove.
Install a 2 x 3 in. (51 mm x 76 mm) vertical switch
box at the selected location.
4 Using the two screws provided, fasten the adapter
plate to the switch box as shown in Fig. 1.
5 Pull the wires from the switch box through the
opening in the adapter plate and connect to the H46
leadwires with the solderless connectors provided.
See Fig. 4 through 6 for a typical hookup.
6 Push the wires back into the switch box.
7 Place the H46 against the adapter plate, making
certain the tab at the bottom of the plate fits into the
notch on the H46.
Copyright © 1996 Honeywell Inc. • All Rights Reserved
WALL SURFACE
ADAPTER PLATE
PLATE TAB
NYLON
ELEMENT
M7907
H46 LEADWIRES (2)
Fig. 1. Mounting H46D on vertical switch box.
95-6171-2
H46D,F HUMIDITY CONTROLLERS
H46D,F
CONTROLLER
FAN
CONTROLLER
WOOD SCREWS
TEMPERATURE
RISE
HUMIDITY
FALL
2 IN.
FAN MOTOR
L1 (HOT)
KEYHOLES
IN BACK OF
CASE (2)
HUMIDIFIER
L2
POWER
1
SUPPLY
1 PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
M7920
WALL
SURFACE
H46
(COVER ON)
CORD
Fig. 4. Typical wiring diagram for H46D,F
single-speed fan motor.
M7908
FAN CONTROL
L4068
Fig. 2. Mounting H46F with two screws.
COOLING
RELAY R8230
FAN MOTOR
C
L2
POWER
SUPPLY
1
LO
STANDARD WALL OUTLET
OR EXTENSION CORD
L1 (HOT)
HI
TO H46F
2
SAIL
SWITCH
S688A
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.
H46F PLUG
HUMIDIFIER PLUG
3 TO PREVENT HUMIDIFIER OPERATION
IN SUMMER, TURN H46D KNOB
TO OFF POSITION.
M7919
TO HUMIDIFIER
Fig. 3. Connecting H46F interrupter plug.
HUMIDITY
FALL
HUMIDIFIER
MOTOR
M7911
Fig. 5. Typical wiring diagram for H46D in forced air
system with 2-speed fan motor.
Wiring
Disconnect power supply before connecting wiring to avoid
electrical shock or equipment damage. All wiring must
comply with local codes and ordinances. Do not exceed
contact and coil ratings when wiring into the system.
95-6171—2
3
H46D
HUMIDITY
CONTROL
2
H46D,F HUMIDITY CONTROLLERS
H46D
SETTING AND ADJUSTMENT
HUMIDITY
FALL
RA89A RELAY
T
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.
T
RELAY
TRANSFORMER
JUMPER
REMOVED
2
4
3
1
CHECKOUT
FAN
MOTOR
HUMIDIFIER
After all mounting and wiring 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.
FAN
CONTROL
L2
L1
(HOT)
POWER
SUPPLY
1
1
L1
(HOT)
L2
POWER
SUPPLY
1
PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
M7912
Fig. 6. Typical wiring diagram for H46D with a
switching relay.
3
95-6171—2
Home and Building Control
Honeywell Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
Home and Building Control
Honeywell Limited-Honeywell Limitée
155 Gordon Baker Road
North York, Ontario
M2H 2C9
95-6171—
—2 J.S. Rev. 4-96 Printed in Taiwan R.O.C.
Helping You Control Your World