24V
R
C
BYP
ASS
ODT
H
PO
WER
STEP 1:
Unpack the Humidifier Control Carton
Make sure all components are present (see
Figure A
):
A. Humidifier Control
C. Manual Mode Label
B. Outdoor Temperature Sensor
D. Manual Mode Resistor Case
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
IMPORTANT – This Document is customer property and is to remain with this unit. Please return to service information
pack upon completion of work.
THIS INFORMATION IS FOR USE BY INDIVIDUALS HAVING ADEQUATE BACKGROUNDS OF ELECTRICAL AND MECHANICAL EXPERIENCE. ANY ATTEMPT
TO REPAIR A CENTRAL AIR CONDITIONING PRODUCT OR ACCESSORY HUMIDIFIER OR HUMIDIFIER CONTROL MAY RESULT IN PERSONAL INJURY AND/OR
PROPERTY DAMAGE. THE MANUFACTURER OR SELLER CANNOT BE RESPONSIBLE FOR THE INTERPRETATION OF THIS INFORMATION, NOR CAN IT
ASSUME ANY LIABILITY IN CONNECTION WITH ITS USE.
These instructions do not cover all variations in systems or provide for every possible contingency. Should further information be desired or particular
problems arise which are not covered sufficiently by this manual, contact your local distributor or the manufacturer as listed on the humidifier nameplate.
Use the “OFF” setting to turn the
Humidifier Pad Change indicator OFF.
Use setting “A” for very
hard water conditions in
any location. Humidifier Pad
Change indicator LED light
will activate after 75 hours
of solenoid valve operation.
Use setting “B” for winters
in the South. Humidifier Pad
Change indicator LED light
will activate after 300 hours
of solenoid valve operation.
Use setting “C” for winters in the Midwest
and Eastern United States. Humidifier Pad
Change indicator LED light will activate after
600 hours of solenoid valve operation.
Figure B
BYPASS/POWER
MODE SWITCH
HUMIDIFIER
PAD INDICATOR
SETTING
90-1010
Installer’s Guide
18-CH31D1-3
Automatic Humidifier Control
*CONTH01AAUTOA
*May be “A” or “T”
R E A D C O M P L E T E I N S T A L L A T I O N I N S T R U C T I O N S A N D T E M P L A T E B E F O R E S T A R T I N G .
WARNING:
HAZARDOUS VOLTAGE – DISCONNECT POWER BEFORE INSTALLING OR SERVICING
WARNING
CAUTION
A
D
HUMIDIFIER PAD
CHANGE INDICATOR
Figure A
C
B
90-1009
STEP 2:
Disassemble the Humidifier Control
Remove door from the Humidifier Control by pulling the bottom of the door
straight out.
STEP 3:
Check the Mode Switch
With the door removed, notice the switch labeled BYPASS and POWER
(partially covered by the enclosure). Make sure the switch is correctly set for
the type of humidifier being installed or damage to the Humidifier Control
could result (see
Figure B
).
STEP 4:
Check the Change Humidifier Pad Indicator Setting
This setting controls the indicator light interval, reminding you to change your
Humidifier Pad. If your Control came with a humidifier, the Control is pre-set at
position “C”. If the installation site has a 3-month or shorter heating season or
very hard water, you may want to adjust the setting (see
Figure B
). The Control
must be energized to reset the Humidifier Pad Indicator.
1. 120 volts may cause serious injury from electrical shock. Disconnect
electrical power to the furnace before starting installation.
2. Sharp edges may cause serious injury from cuts. Use care when
cutting plenum openings and handling ductwork. Use personal
protective equipment when installing or servicing HVAC equipment.
1. Do not set humidity higher than recommended. Property damage may
result.
2. Do not set humidity up to recommended levels if there is condensation
on the inside of windows of any unheated living space. Property
damage may result.
3. Do not mount Humidifier Control on supply plenum or duct. The Control
will not withstand supply temperatures.
4. When installing Humidifier Control on downflow furnaces, ensure
blower continues to run after a heat call is satisfied to eliminate high
temperatures from damaging the Humidifier Control.
5. Do not mount Humidifier Control downstream of the bypass outlet. The
Control will not operate correctly due to false humidity readings.
6. Set the Bypass/Power mode switch in the proper position, or damage
to the Humidifier Control could result (see
Step 3
).
THESE INSTALLATION INSTRUCTIONS ARE FOR THE AUTOMATIC HUMIDIFIER CONTROL ONLY!
For Humidifier installation, follow Humidifier Installation Instructions.
© 2008 Trane. All rights reserved.
18-CH31D1-3
DOOR
Note:
The Control may installed in automatic or manual mode.
