Install Instructions

2726
SYMPTOM
Humidifier operates only in “Test/Reset” mode.
• If outdoor temperature is greater than 60°F or less than
-30°F, the Humidifier Control will only operate in the
“Test/Reset” mode (for 1 minute).
• If the humidity level in the home is higher than the
Humidifier Control knob setting, the Humidifier Control will
not operate the humidifier.
TROUBLESHOOTING PROCEDURE
• Measure the resistance of the Outdoor Temperature Sensor
by removing the leads from the Humidifier Control terminals
and measuring the resistance across the wires with an
ohmmeter. Confirm the reading with the temperature in
Table 1. Reconnect the ODT Sensor leads. If the resistance
value does not match the temperature value, replace the
Outdoor Temperature Sensor.
• Make sure that the Outdoor Temperature Sensor is mounted
completely outside the house on the North, East or West
side of the house and out of direct sunlight. (Automatic
Mode Only)
• Make sure that the Outdoor Temperature Sensor is located
at least 3 feet away from all exhaust vents. (Automatic
Mode Only)
• If Outdoor Temperature Sensor is mounted in the fresh air
intake duct, make sure that the sensor is no more than 3
feet from the outside wall. (Automatic Mode Only)
• Make sure the R and C terminals are wired per enclosed
wiring diagrams.
• If control setting was changed from Automatic to Manual,
power to the control must be disconnected, then restored.
SYMPTOM
Humidifier operates constantly.
• If the humidity level in the home is less than the Humidifier
Control knob setting and there is a continuous fan call or
heat call (depending on setup), the Humidifier Control will
operate the humidifier until the humidity level is higher than
the Humidifier Control knob setting.
TROUBLESHOOTING PROCEDURE
• Set Blower Activation switch to OFF.
• In the “Test/Reset” mode, verify that the humidifier turns off
after 1 minute.
• Check the Outdoor Temperature Sensor resistance and
location, as instructed on the previous page.
• Rotate the Humidifier Control knob counterclockwise to the
“Off” position, and observe whether the humidifier turns off.
If the humidifier still operates in the “Off” position, perform
the following:
1. Check the wiring diagram for correct Humidifier Control
Installation.
2. Remove the wires from the “H” terminals on the
Humidifier Control. If the humidifier continues to operate,
replace the solenoid valve.
• Ensure HumidifIer Control is installed per instructions in
STEP 1 of the INSTALLATION section.