TROUBLESHOOTING PROCEDURE
• Make sure furnace blower is operating and thermostat is calling for heat.
• Make sure the Outdoor Temperature Sensor is connected to the “ODT” terminals of the control. (For Manual Operation,
make sure Manual Mode Resistor
Case is in place.)
• Check main wiring diagram for
correct Humidifier Control installation.
• Check voltage at Humidifier Control
“R” and “C” terminals. Voltage
should be 22 VAC minimum – 30 VAC
maximum.
• Check Current Sensing Relay
(if used) for correct installation (see
Current Sensing Relay instructions).
Do not use Current Sensing Relay in
transformer circuit or “R” and “C”
circuit of Humidifier Control. Current
Sensing Relay is to be used in the
“H” circuit only.
• In “Test” mode, humidifier will
operate for 1 minute only. DO NOT
LEAVE IN TEST MODE AS
HUMIDIFIER WILL NOT OPERATE
• Make sure saddle valve is open.
Humidifier Control Troubleshooting Guide
Applies to both Automatic and Manual Operation unless indicated otherwise.
SYMPTOM
Humidifier does
not operate in
“Test” mode
System Checkout
1. For system Test/Reset, be sure that 24 VAC is applied to the “R” and “C” terminals
of Humidifier Control.
2. Snap the door back onto the Humidifier Control Base.
3. Activate furnace blower and be sure thermostat is calling for heat.
4. Rotate the control knob of Humidifier Control clockwise to the “Test/Reset” position.
When the knob is set in the “Test/Reset” position, the green “Change Humidifier Pad”
light will blink. Make sure the knob is not left in the “Test/Reset” position when the
installation is done. Rotating knob to test position resets the humidifier pad change timer
to zero. The Control must be energized to reset the Humidifier Pad Indicator.
5. If all is set up properly, you should be able to hear the solenoid valve click open.
In “Test/Reset” mode, the Humidifier will operate for 1 minute.
6. If the humidifier does not activate with the
Humidifier Control in the “Test/Reset” position,
refer to troubleshooting guide.
7. Setting the Humidifier Control:
• If home is occupied, set Humidifier Control to
“Normal” (For Manual Operation, set to 35%)
• If home is vacant, set Humidifier Control to “Off”
8. Inform homeowner to refer to the Owner’s Manual
for the initial adjustment period.
9. Make sure the Red Diagnostic Light is not lit. If the
Red Diagnostic Light is lit, re-check your wiring.
WARNING
Sharp edges on the opening may cause cuts. Use care when cutting the plenum opening
and installing the Humidifier Control.
CAUTION
• Do not mount Humidifier Control on supply plenum or duct. The unit will not withstand
supply temperatures and will malfunction!
• When installing Humidifier Control on counterflow furnaces, ensure blower continues
to run after a heat call is satisfied to eliminate high temperatures from damaging the
Humidifier Control.
• Do not mount Humidifier Control downstream of the bypass outlet. False humidity
conditions will cause humidifier to operate incorrectly.
1.
CUT OUT TEMPLATE ALONG EDGES.
2.
PLACE TEMPLATE ON THE RETURN PLENUM UPSTREAM OF (BEFORE) THE
HUMIDIFIER CONNECTION.
3.
TRACE OUTSIDE EDGES OF TEMPLATE.
4.
REMOVE TEMPLATE AND ACCURATELY CUT PLENUM OPENING.
5.
USING 4 SHEET METAL SCREWS, INSTALL HUMIDIFIER CONTROL IN PLENUM OPENING.
HUMIDITRAC CONTROL
WIRING TERMINALS
24V
ODT
H
R
C
R
C
H
ODT
24V
PO
WER
BYP
ASS
SWITCH POSITION
OUTDOOR
TEMPERATURE
SENSOR
VARIABLE SPEED
FAN COIL
24 VAC
HUM 1
HUM 2
STANDARD FURNACE &
VARIABLE SPEED FURNACE
HUMIDITRAC CONTROL
WIRING TERMINALS
HUMIDIFIER
24 VAC LEADS
(COMMON)
C
HUM
(HUMIDIFIER)
24 VAC
TERMINALS
ON FURNACE
HUMIDIFIER CORD
PLUGGED INTO
120 VAC POWER SOURCE
24 VAC
120 VAC
TOTALINE P110-0050
CURRENT SENSING
RELAY
COMMON LEAD
24 VAC LEADS
FURNACE / AC
BLOWER MOTOR
TRANSFORMER
(FIELD SUPPLIED)
HUMIDIFIER
OUTDOOR
TEMPERATURE
SENSOR
HUMIDIFIER CORD
PLUGGED INTO
120 VAC POWER SOURCE
C
LO
HI
R
C
H
ODT
24V
HUMIDITRAC CONTROL
WIRING TERMINALS
SWITCH POSITION
BYP
ASS
PO
WER
24 VAC
SOLENOID VALVE
LEADS
HUMIDITRAC CONTROL
WIRING TERMINALS
OUTDOOR
TEMPERATURE
SENSOR
24V
ODT
H
R
HUMIDIFIER
HUMIDIFIER
24 VAC
SOLENOID VALVE
LEADS
24 VAC
TERMINALS
ON FURNACE
24 VAC
120 VAC
120 VAC
“EAC”
TERMINALS
ON FURNACE
TRANSFORMER
(FIELD SUPPLIED)
NOTE: CONNECT SOLENOID VALVE TO HOT
WATER IF HUMIDIFIER WILL BE OPERATED
INDEPENDENT OF HEATING CALLS.
C
HUM
C
OUTDOOR
TEMPERATURE
SENSOR
Diagram A
STANDARD FURNACE; VARIABLE SPEED FURNACE; VARIABLE SPEED FAN COIL
Diagram B
STANDARD FAN COIL
Diagram C
FOR OPERATION DURING
“HEAT CALL” ONLY
Diagram D
FOR OPERATION WHEN
BLOWER IS ENERGIZED
FAN POWERED HUMIDIFIER WIRING DIAGRAM
BYPASS HUMIDIFIER WIRING DIAGRAM
90-1017
90-1018
