HE220, HE260 HUMIDIFIER AND INSTALLATION KIT
69-1645EF 2
Determining Best Location for Humidifier
CAUTION
Temperature and Static Pressure Hazard.
Can cause property or equipment damage.
Locate humidifier where ambient temperature is
between 32°F (0°C) and 160°F (71°C).
Do not install humidifier where freezing
temperatures could occur.
Be sure supply plenum static pressure is no
greater than 0.4 in. wc and water pressure is no
greater than 124 psi.
• Select a location for the humidifier on the supply
(warm air stream) plenum. See Fig. 1.
• Select a location that cannot damage the air
conditioner A-coil during installation.
• Do not locate the humidifier on the furnace body.
• Allow adequate clearance in front of and above the
humidifier so you can easily remove the cover to
perform routine maintenance.
— Mount the humidifier at least 3 in. (78 mm) above
the furnace body to allow adequate space for the
solenoid valve and drain line.
— Mount the humidifier in a conditioned space to
prevent freezing.
Fig. 1. Typical humidifier instal lation locations.
Selecting Water Supply Location
• Use either hard or soft water in the humidifier and
either hot or cold water. The water flow rate, with the
humidifier running, is 3.5 gal/hr (13 liters/hr) to flush
the pad and provide moisture for evaporation.
• Make sure that the 20 ft (6.2m) of feed water tubing
provided is adequate to connect the water supply
(saddle valve) with the humidifier solenoid valve.
Locating Closest Floor Drain
• Select location with access to a floor drain to provide
drainage for air conditioner condensation and
humidifier drainage.
• If you do not have a drain available, we recommend
that you install the Honeywell Whole House Drum or
Disk Humidifier. Make sure that the 10 ft (3.1m) of
drain tubing is adequate to reach from the humidifier
drain connection to the floor drain.
Selecting Location for Sail Switch
• Select a location for the sail switch in the cold air
return duct where the sail is in the direct path of an
unrestricted air stream.
— Sail switch detects when furnace fan is operating.
• Select a location where the air duct is at least 12 in.
(305 mm) deep and 8 in. (203 mm) wide to allow
operation of the sail without affecting the smooth flow
of air in the duct.
— Airflow at the location can be vertical (up or
down) or horizontal.
IMPORTANT
Mounting the S688 in warm air supply duct can
reduce the sail life.
• Mount the switch at least 6 in. (152 mm) upstream
from an elbow or junction, and at least 15 in.
(381 mm) downstream from an elbow or junction.
• Locate the switch on the opposite side of the duct
from the air entrance. (See Fig. 1-3 in S688
Installation Instructions.)
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.
For return duct mounting, the humidistat should be
mounted upstream from the humidifier or bypass so that
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. 2.)
Fig. 2. Selecting duct location for humidistat.
Locating Closest 120V Electrical Outlet
• Select location with access to an outlet. If not
available, contact an electrician to have one installed.
• Make sure that the humidifier cord is adequate to
reach from the humidifier to the outlet.
• Make sure that the 20 ft (6.2m) of thermostat wire is
adequate to reach from the humidifier solenoid, to the
sail switch, to the humidistat.
M12808A
HORIZONTAL
DOWN
FLO
LOWBOY
RETURN RETURN
RETURN
HIGHBOY
RETURN
ALTERNATE LOCATION
RETURN
AIR RETURN
AIR
6 in. (152 mm)
MINIMUM 15 in. (381 mm)
MINIMUM
BEST
LOCATION
RETURN AIR DUCT M12831