TROUBLESHOOTING
SYMPTOM DIAGNOSTIC STEPS
2. Check voltage at humidifier control terminals.
There should be no voltage for Power Humidifier.
Voltage should be 20-30 VAC for most others.
3. Inspect humidifier wiring. Refer to wiring diagrams.
DO NOT LEAVE IN "ON" POSITION, OVER HUMIDIFICATION WILL OCCUR.
1. Set thermostat to operate both furnace burner and blower.
Operation may be necessary for system power.
No Humidifier
Operation in
"ON" position
1. Humidity level in the home is higher than knob setting.
Humidifier control will not operate the humidifier until
humidity level is reduced.
Humidifier
operation in
"ON" position
only
1. When the humidity in the home is less than the knob
setting, the control will operate humidifier until the
humidity is higher. Reduce knob setting.
2. Use "ON" position. Verify that the humidifier operates.
1. Check voltage at humidifier control terminals.
There should be no voltage for a Power Humidifier.
Voltage should be 20-30 VAC for most others.
2. If mounted on return air duct, make sure humidifier control
is at least 24" upstream of humidifier's air discharge.
Humidifier
turns on and
off repeatedly
3. Remove wires from control terminals. If humidifier
continues to operate, check solenoid valve.
Humidifier
operation
continuous
WIRING
WARNING! Disconnect electrical power before beginning installation.
The wiring must conform to all building codes and ordinances as required by
local and national code authorities having jurisdiction for this installation.
Refer to the following wiring diagrams.
CHECKOUT
With furnace in operation, turn humidistat to "ON" position. Observe
humidifier operation.
SETTINGS
WARNING! Do not set relative humidity too high during cold weather. Over
humidification can result in condensation, structural damage and mold.
Condensation within a building's structure can cause loss of structural
strength. Condensation can also enable mold and mildew growth resulting in
personal injury and damage to building structure and contents.
Refer to OPERATION for proper settings.
I. SAFETY
WARNING! Improper electrical wiring can result in fire or loss of humidity
control. Disconnect electrical power before installing and servicing. Failure to
disconnect electrical power may result in injury or death. The wiring must
conform to all building codes and ordinances as required by local and
national code authorities having jurisdiction for this installation.
The 229100 must be installed by a qualified Technician. Failure to properly
install the 229100 may result in property damage or personal injury.
Homeowners must read instructions and understand the operation of the
229100 and the humidifier(s) it controls.
Improper operation can result in over or under humidification. Over
humidification can result in condensation, structural damage and mold.
Condensation within a building's structure can cause loss of structural
strength. Condensation can also enable mold and mildew growth resulting in
personal injury and damage to building structure and contents.
OUTDOOR
TEMPERATURE
RECOMMENDED
SETTING
INSTALLER:
PLEASE LEAVE OWNERS MANUAL WITH HOME OWNER.
HUMIDISTAT OWNERS MANUAL
II. APPLICATION
The 229100 humidistat provides low voltage control of humidifiers installed in
central heating systems. The humidistat has a SPST switch and is designed
for mounting on the return air duct.
RANGE: 10% to 85% RH ELECTRICAL RATING: 30 VAC / 60 VA
OPERATION
Set the control knob to the desired humidity
setting. The recommended setting for
optimum humidification is 30% to 50%. The
vertical position on the knob is approximately
42% RH.
Setting the humidistat above or below the
recommended settings may not provide
satisfactory results for your home.
229100
40°F 4°C 45
30°F -1°C 40
20°F -7°C 35
10°F -12°C
0°F -18°C
30
25
-10°F - 23°C
-20°F -29°C
20
15
III. INSTALLATION INSTRUCTIONS
PRECAUTIONS
The installer must be a qualified technician. Disconnect electrical power
before beginning installation. Do not install the humidistat on the warm air
duct. Conduct a thorough checkout before leaving the installation.
DUCT MOUNTING ON THE RETURN AIR - PREFERRED METHOD
Do not install the humidistat on the warm air duct or within 48” of UV light.
1. Locate the humidistat at least 24" upstream of the humidifier or
bypass on the return air duct. Avoid areas of direct radiation like
secondary heat exchangers in the fan compartment.
2. Remove face by inserting screwdriver into pry slot and twisting
(see fig 2)
3. Use the plastic duct mount plate as a template. Accurately mark and
drill the (4) 3/32”mounting holes and cut away the 4-1/4” x 2-1/2”
section of the duct inside the duct mount plate.
4. Place duct mount base gasket on the humidistat base and mount the
base with four screws. Low voltage wire may enter the humidistat
under the gasket (see fig 2).
5. Connect wires to screw terminals on the control assembly as shown in
wiring diagrams. Replace face and knob.
WALL MOUNTING INSTRUCTIONS
NOTE: Requires wall mount kit (Model 229110)
1. Chose a location for the 229100 about five feet above the floor
on an inside wall with average room temperature and relative
humidity conditions.
2. Drill a small hole in the wall and run low voltage wiring to the
location chosen. Pull about 6” of wire through the hole. Use the entire
mounting gasket (both inside and outside portions) to seal the wall
opening or use foam tape to prevent drafts from affecting the
humidistat operation. (see fig. 3)
3. Remove the knob on the humidistat. Squeeze the top and
bottom of the base to release the face of the humidistat.
4. Mount the base horizontally over the wires. Attach directly to
the wall, using the two screws provided in the slotted holes.
5. Connect wires to screw terminals on the control assembly as
shown in wiring diagrams. Replace face and knob.
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