HE105, HE205 WHOLE HOME BYPASS HUMIDIFIER
3
33-00229EF—01
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.
• Make sure that the thermostat wire is adequate to
reach from the humidifier to the humidistat, and also
from the humidifier to the transformer. See “Wiring” on
page 5 for more information.
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.)
Fig. 3. Selecting duct location for humidistat.
INSTALLATION
1.
Turn off power to the air handling system at the
circuit breaker.
2.
Draw a level line on the plenum in the selected
location.
IMPORTANT
Be sure the mounting template is level before
marking. Use of a small level is recommended.
3.
Locate the template (form number 33-00210,
included in the box). For the HE105 model, cut out
the template along the dotted line. For the HE205
model, use the entire sheet as a template.
4.
Tape the template in position and trace around the
template.
5.
Remove the template and carefully cut the
rectangular opening using tin snips.
6.
Disassemble the humidifier; remove the cover and
take out the humidifier pad assembly. See Fig. 4.
Fig. 4. Disassembling humidifier.
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.
M33410
ALTERNATE LOCATION
RETURN
AIR
RETURN
AIR
6 in. (152 mm)
MINIMUM
15 in. (381 mm)
MINIMUM
BEST
LOCATION
RETURN AIR DUCT
M12831
M31022A
WATER
FEED NOZZLE
FRAME
HUMIDIFIER
HOUSING
WATER
FEED TUBE
HUMIDIFIER
PAD ASSEMBLY
COVER
SIDEWALL
BY-PASS SIDEWALL
