Use and Care Manual

HE240, HE280 HUMIDIFIER
69-2685ES—07 4
Determining Best Location for Humidifier
• Select a location for the humidifier on the supply (warm air stream) duct. See Fig. 1 for examples. Return duct
mounting is acceptable if there are space restrictions on the supply duct. If you are mounting the humidifier
on the return duct, simply swap “return duct” for “supply duct” throughout these instructions.
• Select a location that cannot damage the air conditioner A-coil during installation.
• Do not locate the humidifier on the furnace body.
• Mount the humidifier in a conditioned space to prevent freezing.
• Mount the humidifier at least 3 in. (78 mm) above the furnace body to allow adequate space for the solenoid
valve and drain line.
Fig. 1. Typical humidifier installation locations.
Fig. 2. Typical humidifier installation locations.
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.)
M12248E
HORIZONTAL
DOWN
FLO
LOWBOY
HIGHBOY
HUMIDIFIER
BYPASS
COLLAR
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.
M33410A