White Rodgers 2273W, 2271, 2271W, 2272W, 2274W User Manual
Operator: Save these instructions for future use!
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY
BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE
PERSONAL INJURY AND/OR PROPERTY DAMAGE.
These wall-mounted, line or low voltage humidity controls
are available as a Humidistat commonly used to control
and operate a furnace humidifier or as a Dehumidistat
commonly used to cycle an air conditioning system to
control humidity in an unoccupied home to prevent mildew build-up associated with high humidity levels.
These humidity controls feature a moisture-sensitive
nylon sensing element and also provide positive ON-OFF
settings for manual operation.
2271/72/73/74W
Line or Low Voltage
Humidistat / Dehumidistat
INSTALLATION INSTRUCTIONS
DESCRIPTION
If in doubt about whether your wiring is line, or low voltage,
have it inspected by a qualified heating and air conditioning contractor, electrician, or someone familiar with basic
electricity and wiring.
Do not exceed the specification ratings.
All wiring must conform to local and national electrical
codes and ordinances.
CONTENTS
Description .............................................................................. 1
Precautions ............................................................................. 1
Specifications.......................................................................... 2
Installation............................................................................... 2
Select Humidity Control Location
Route Wires to Location
Wiring
Attach Humidity Control to Wall
Operation ................................................................................ 4
Humidistat Control
Dehumidistat Control
2271W
2274W
PRECAUTIONS
This control is a precision instrument, and should be
handled carefully. Rough handling or distorting components could cause the control to malfunction.
CAUTION
To prevent electrical shock and/or equipment damage, disconnect electric power to system, at main
fuse or circuit breaker box, until installation is
complete.
Do not short out terminals on primary control to
test. Short or incorrect wiring will burn out humidity control and could cause personal injury and/or
property damage.
WARNING
Do not use on circuits exceeding the rated voltage. Higher voltage will damage control and could
cause shock or fire hazard.
White-Rodgers is a division
of Emerson Electric Co.
www.white-rodgers.com
PART NO. 37-9600D
Replaces 37-9600C
0528
SPECIFICATIONS
ELECTRICAL DATA
Electrical Rating:
2271W Humidistat 0.5A, @ 120V AC, 60Hz.
2272W
2273W De-Humidistat 1.0A, @ 120V AC, 60 Hz.
2274W
Pilot Duty 30V AC, 60Hz., 60VA.
INSTALLATION
SELECT THERMOSTAT LOCATION
Proper location insures that the humidity control will
provide a desired humidity level throughout the home.
Observe the following general rules when selecting a
location.
1. Locate humidity control about 5 ft. above the floor.
2. Install humidity control on a partitioning wall, not on
an outside wall.
3. For most residential applications locate humidity
control adjacent to the existing wall thermostat for
easy installation and wiring.
4. Never expose humidity control to direct light from
lamps, sun, fireplaces or any temperature radiating
equipment.
5. Avoid locations close to windows, adjoining outside
walls, or doors that lead outside.
THERMAL DATA
Setpoint Humdity:
Range: 30 to 80% RH
Diff.: 5% RH
Operating Ambient: 10° to 40° C (50° to 104°F)
2. Through this hole drop a light chain, or 6" chain
attached to a strong cord. Snag cord in basement with
hooked wire. In basementless houses, drop cord
through hole in ceiling and down partitioning; snag
cord at the humidistat location.
3. Attach humidistat cable to cord and pull cable through
hole in wall so that 6" of cable protrudes.
4. Position a typical electrical re-work box over 1/2" hole
and cut around outline of electrical box. Pull wiring
through knockout and secure electrical box in wall.
ROUTE WIRES TO LOCATION
All wiring must conform with local and national electrical codes and ordinances.
1. Probe for obstructions in partition before drilling 1/2"
hole in wall at selected location. Take up quarter
round and drill a small guide hole for sighting (see
Fig. 1). From basement, drill 3/4" hole in partition
floor next to guide hole. In basementless houses,
drill 1/2" hole through ceiling and into partition from
above (see Fig. 1).
CAUTION
To prevent electrical shock and/or equipment
damage, disconnect electrical power to system,
at main fuse or circuit breaker box, until installation is complete. Verify power is off with a voltmeter.
1
⁄2" HOLE FOR
THERMOSTAT WIRE
STOUT CORD WITH 6"
CHAIN ATTACHED
BASEBOARD
STRIP MOLDING
1
⁄4" GUIDE HOLE
FOR SIGHTING
QUARTER ROUND
REMOVED
HOOKED WIRE FOR SNAGGING CHAIN
Figure 1. Routing Thermostat Wires
APPROXIMATELY
3
⁄4" HOLE IN FLOOR OF PARTITION
5 FEET
2
ATTACHING HUMIDITY CONTROL
TO ELECTRICAL BOX
1. With wallplate still attached to humidity control and
wires through wallplate, connect leads together; one
black to Line, other black to Load and secure with wire
nuts. Connect green wire to electrical box ground.
(see Fig. 2)
2. Remove the two screws from the humidity control
cover and separate the humidity control from wallplate
by gripping the wallplate in one hand. Use the other
hand to pull gently at the top and bottom of the humidity
control.
3. Push wire connections into electrical box, place
wallplate over electrical box (insuring wallplate is right
end up for vertical or horizontal) line up mounting holes
and fasten wallplate with screws supplied. (see Fig. 3)
4. Holding humidity control, push switch wires into electrical box and snap humidity control onto wallplate.
Re-install the two screws removed in step 2.
5. Turn on power to system.
HUMIDITY
CONTROL
MOUNTING
SCREWS
Figure 2.
Connecting Humidity
Switch Wires
WALL
PLATE
MOUNTING
SCREWS
CAUTION
Cover screws must be installed to prevent electrical shock hazard.
WIRING
All wiring must conform with local and national electrical codes and ordinances.
TYPE 2271/2272 HUMIDISTAT
WIRE
NUTS
Figure 3.
Attaching Wallplate
to Electrical Box.
GREEN WIRE
24vAC
120vAC
HUMIDITY
CONTROL
All wiring diagrams are for typical
systems only. Refer to equipment
manufacture's instructions for specific system wiring information.
FAN CONTROL
HOT
LINE
TRANSFORMER
FURNACE
HUMIDIFIER
FURNACE
BLOWER
MOTOR
Figure 4. Typical Furnace Humidifier Humidistat Wiring Diagram
3
NEUTRAL
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