Honeywell HE240 Installation Instructions Manual page 6

HE240, HE280 HUMIDIFIER AND INSTALLATION KIT

Selecting Location for Humidistat

• Select a location for the humidistat on the return plenum or on the wall in the

living space.

• Mounting on the return plenum is the easiest installation for the control wiring

circuit.

IMPORTANT

The humidistat must be mounted upstream from the humidifier or bypass duct to

ensure it is properly sensing the relative humidity of the living space. Locate the

control at least 8 in. (203 mm) upstream from the humidifier in the return air duct.

(See Fig. 3.)

Locating Closest 120 V Electrical Outlet

• Select location with access to an outlet. If not available, contact an electrician to

have one installed.

• Make sure that the 20 ft (6.2 m) of thermostat wire is adequate to reach from the

humidifier to the humidistat, and also from the humidifier to the transformer.

Please note that the thermostat wire will need to be cut into the 2 correct lengths.

See "Wiring" on page 14 for more information.

69-2685ES—01

Fig. 2. Typical humidifier installation locations.

RETURN

AIR

6 in. (152 mm)

MINIMUM

BEST

LOCATION

RETURN AIR DUCT

Fig. 3. Selecting duct location for humidistat.

CHOOSE A LOCATION IN A CONDITIONED

SPACE THAT HAS ACCESS TO A WATER SUPPLY

PIPE. COLD OR HOT WATER CAN BE USED.

SELECT A SURFACE ON THE HVAC SUPPLY OR

RETURN DUCT WITH CLEARANCE FOR THE

SOLENOID VALVE, DRAIN LINE AND COVER

REMOVAL.

LOCATION MUST ALSO HAVE ACCESS TO 120

VAC POWER.

ENSURE THE LOCATION IS NEAR A DRAIN.

CONSULT LOCAL PLUMBING CODES FOR

PROPER DRAINAGE.

ALTERNATE LOCATION

15 in. (381 mm)

MINIMUM

6

RETURN

AIR

M12831

M33410