Honeywell H46C User manual

H46C Humidity Controller

INSTALLATION INSTRUCTIONS

APPLICATION

The H46C Humidity Controller is used with portable and

central unit dehumidifiers to maintain relative humidity.

The H46 has an spst, snap-acting switch designed for

line voltage circuits and two leadwires for switch box

mounting.

INSTALLATION

When Installing this Product...

1. Read these instructions carefully. Failure to follow

them could damage the product or cause a

hazardous condition.

2. Check the ratings 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

Electrical Shock Hazard.

Can cause electrical shock or equipment

damage.

Disconnect power supply before connecting

wiring.

Location

Select a location about 5 ft (1.5m) 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

1. Remove the setting knob.

2. To remove cover, pull cover forward from device.

3. Install a 2 in. 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.

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. 2 and 3 for 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.

8. Fasten the H46 to the adapter plate by tightening

the captive screw.

9. Replace the cover and the setting knob.

2 X 3 IN.

H46

(COVER OFF)

H46 CAPTIVE

MOUNTING SCREW

ADAPTER PLATE

SCREWS (2) SWITCH BOX

NYLON

ELEMENT H46 LEADWIRES (2)

PLATE TAB

ADAPTER PLATE

WALL SURFACE

M7907

Fig. 1. Mounting H46C on vertical switch box.

Wiring

Disconnect power supply before connecting wiring to

avoid electrical shock or equipment damage. All wiring

must comply with local codes or equipment damage. All

wiring must comply with local codes and ordinances. Do

not exceed contact and coil ratings when wiring into

system. See Fig. 2.

® U.S. Registered Trademark

H46C HUMIDITY CONTROLLER

H46C

HUMIDITY CONTROLLER

RISE DEHUMIDIFIE

EXHAUST FA

(HOT)

OR AIR

OWER CONDITIONE

UPPLY

PROVIDE DISCONNECT MEANS AND OVERLOAD

M7923

PROTECTION AS REQUIRED.

Fig. 2. Typical H46C wiring diagram.

Connections and Operation

A dehumidistat in combination with the thermostat can be

used to run the air conditioner to control relative humidity

levels. The dehumidistat and thermostat can be wired in

parallel or in series.

Wiring in parallel allows the dehumidistat to indepen-

dently control the humidity level, but could cause

overcooling of the home. During unoccupied times, the

homeowner should set the thermostat to a relatively high

setting and control moisture using the dehumidistat.

Wiring in series prevents overcooling but the air

conditioner runs only when both the thermostat and

dehumidistat are calling. During unoccupied times, the

homeowner should set the thermostat to a relatively low

setting and control moisture using the dehumidistat.

SETTING AND ADJUSTMENT

The H46 makes contact on a relative humidity rise to the

setpoint to start the dehumidifier. On a decrease in

relative humidity to the setpoint (minus the differential),

the switch breaks contact to stop the dehumidifier. 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 completing all mounting and wiring, turn on the

power supply. Place the system into operation by turning

the setting knob toward the low end of the scale until the

dehumidifier motor starts. Turn the setting knob slowly

toward the high end of the scale until the dehumidifier

motor stops.

H46C

T87F/Q539A INTERNALSCHEMATIC

TEMPERATURE

FALL

PROVIDE OVERLOAD PROTECTION AND DISCONNECT MEANS

AS REQUIRED.

HEATING DAMPER MOTOR, IF USED.

CLOGGED FILTER SWITCH OR COOLING PANEL CONNECTION.

3 2

BX O

W Y

W1 Y1

G RHR

HEAT OFF FANAUTO ONCOOL HEAT OFF COOL

FIXED

COOL

ANTICIPATOR

ADJUSTABLE

HEAT

ANTICIPATOR

HEATING

RELAY OR

VALVE COIL

COOLING

CONTACTOR

COIL

FAN RELAY

COIL

FILTER

LIGHT

T87F

M791

Fig. 3. Typical parallel wiring hookup for H46C with T87F/Q539A combination

for dehumidification and mildew control.

95-5367-4 2

H46C HUMIDITY CONTROLLER

H46C

T87F/Q539A INTERNALSCHEMATIC

TEMPERATURE

FALL

PROVIDE OVERLOAD PROTECTION AND DISCONNECT MEANS

AS REQUIRED.

HEATING DAMPER MOTOR, IF USED.

3 2

BX O

W Y

W1 Y1

G RHR

HEAT OFF FANAUTO ONCOOL HEAT OFF COOL

FIXED

COOL

ANTICIPATOR

ADJUSTABLE

HEAT

ANTICIPATOR

HEATING

RELAY OR

VALVE COIL

COOLING

CONTACTOR

COIL

FAN RELAY

COIL

FILTER

LIGHT

T87F

CLOGGED FILTER SWITCH OR COOLING PANEL CONNECTION.

M791

Fig. 4. Typical series wiring hookup of H46C with T87F/Q539A combination

for dehumidification and mildew control.

3 95-5367-4

H46C HUMIDITY CONTROLLER

Automation and Control Solutions

Honeywell International Inc. Honeywell Limited-Honeywell Limitée

1985 Douglas Drive North 35 Dynamic Drive

Golden Valley, MN 55422 Scarborough, Ontario

M1V 4Z9

Printed in U.S.A. on recycled

95-5367-4 G.H. Rev. 07-03 paper containing at least 10% www.honeywell.com/yourhome

post-consumer paper fibers.

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