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HUMb-TsT—H—a Calibration Instructions
HUMb-TsT—H—a CalIbRaTIon
InsTRUCTIons
Accurate humidity gauge required
1. Use an accurate humidity gauge to determine the
current relative humidity in the room where the
humidistat is located. This relative humidity will
be used in step 5.
2. Remove the face plate from the housing.
3. Turn the knob on the HUMB-TST—H—A faceplate
to the "on" position.
4. Very slowly, turn the knob clockwise until you
hear a "click" from the humidistat control and
leave the knob in this position.
5. Turn the ring (not the knob) so that the knob is
pointed directly at the current relative humidity
number determined in Step 1. To rotate the
outer ring, locate the locking tab on the backside
of the face plate. Carefully pry up the locking tab
and rotate the outer ring until it matches up with
the humidity level determined in Step 1.
6. The humidistat is now calibrated to match your
humidity gauge.
WIRInG
Disconnect electrical power before beginning
installation. 120 volts may cause injury or even
death.
Refer to the Heat Pump Wiring Diagram on page 10
for proper controller wiring.
All wiring should comply with local electrical
codes.
CHeCKoUT
With the air handler in operation, turn humidistat to
"ON" position. Observe humidifier operation.
Revised 07-12
Caution
Subject to change without prior notice
seTTInGs
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.
CaRe and MaInTenanCe
Your humidifier is engineered to give helpful and
trouble-free humidification. For maximum
efficiency and to ensure the safe and proper
operation of your humidifier, the following cleaning
procedures should be carried out at the end of
each heating season:
If the humidifier is being supplied with hard water,
maintenance will need to be more frequent than
once a year.
1. Turn off water supply and electrical power to
humidifier.
2. Remove water cover, distributor trough,
evaporator pad and drain pan. Clean all mineral
deposits from the distributor trough, drain pan,
pad rails, and humidifier cabinet. A solution of
1/2 vinegar & 1/2 water will help loosen mineral
deposits.
3. Replace humdifier evaporator pad. Install
trough and drain pan. Replace cover. (Replace
evaporator pad yearly for peak performance
and to maintain reliable operation. Replacing
evaporator pad helps to ensure water travels
freely to drain connection.)
4. In heavy mineral areas or if the solenoid valve
fails to function disconnect the 1/4" water
supply line from the solenoid valve. Carefully
pull the strainer screen from the valve body.
Clean the mineral deposits from all parts. If the
orifice is clogged, it may be opened by inserting
a small pin. Reinsert the filter into the orifice
fitting and screw the brass strainer body into
the solenoid valve.
5. Reconnect the 1/4" water line to the solenoid
valve if necessary. Turn on the water supply and
6 720 220 343
IaQ series
7
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