32
18-CD32D1-3
Installer’s Guide
▲
WARNING
!
SAFETY HAZARD
MAKE SURE THAT THE BLOWER DOOR IS IN PLACE AND
NOT AJAR. DANGEROUS FUMES COULD ESCAPE.
FAILURE TO FOLLOW WARNING COULD RESULT IN
SERIOUS PERSONAL INJURY OR DEATH.
This unit is equipped with a Blower Door Switch which cuts
power to the Furnace causing shutdown when the door is
removed. Operation with the door removed or ajar can per-
mit the escape of dangerous fumes. All panels must be se-
curely closed at all times for safe operation of the Furnace.
NOTE TO INSTALLER
Review the following instructions with the homeowner. Re-
view contents of USER’S INFORMATION MANUAL with
the homeowner.
INSTRUCTIONS TO THE HOMEOWNER
In the event that electrical, fuel, or mechanical
failures occur, the owner should immediately
turn the Gas Supply off at the manual Gas Valve,
located in the burner compartment. Also turn
off electrical power to the Furnace and contact
your dealer or a qualified service agent.
▲
WARNING
!
ELECTRICAL HAZARD
Disconnect power to the unit before removing the
Blower door. Allow a minimum of 10 seconds for IFC
Power Supply to discharge to 0 volts.
Failure to follow this warning could result in property
damage, personal injury or death.
CONTROL AND SAFETY SWITCH
ADJUSTMENTS
LIMIT SWITCH CHECK OUT
The Limit Switch is a safety device designed to close the
Gas Valve should the Furnace become overheated. Since
proper operation of this switch is important to the safe op-
eration of the unit, it
must be checked out on initial
start up by the installer.
To check for proper operation of the Limit Switches, set the
Comfort Control to a temperature higher than the indicated
room temperature to start the furnace. Restrict the airflow
by blocking the return air (disconnecting the Indoor Blower
may trip the Inducer Limit). When the Furnace reaches the
maximum outlet temperature as shown on the rating plate,
the burners must shut off. If they do not shut off after a
reasonable time and overheating is evident, a faulty Limit
Switch is probable and the Limit Switch must be replaced.
After checking the operation of the Limit Control, be sure to
remove the restriction from the return air inlet.
AIRFLOW ADJUSTMENT
Check inlet and outlet air temperatures to make sure they
are within the range specified on the Furnace rating name-
plate. If the airflow needs to be increased or decreased, see
the Airflow Label on the Furnace or the unit’s Service Facts
for information on changing the speed of the Blower Motor
for your specific model. Blower speed changes are made on
the User Interface. Where long periods of airflow are de-
sired for comfort, use long fan cycles instead of continuous
airflow.
▲
WARNING
!
ELECTRICAL SHOCK HAZARD
Do not touch any components other than the display
assembly and the door switch during this procedure.
Failure to follow this warning could result in property
damage, personal injury or death.
NOTE:
Direct drive motors have bearings which are permanently
lubricated and under normal use, lubrication is not recom-
mended.
ROOM AIR THERMOSTAT
HEAT ANTICIPATOR ADJUSTMENT
Set the thermostat heat anticipator according to the current
flow measured, or the settings found in the notes on the
furnace wiring diagram (found inside the furnace casing).
Also turn off electrical power to the furnace and con-
tact the service agency designated by your dealer.
▲
WARNING
!
SAFETY HAZARD
Should overheating occur, or the gas supply fail to shut
off, shut off the gas valve to the unit before shutting off
the electrical supply. Failure to follow this warning could
result in property damage, personal injury, or death.
▲
WARNING
!
EXPLOSION HAZARD
Propane gas is heavier than air and may collect in any low
areas or confined spaces. In addition, odorant fade may
make the gas undetectable except with a warning device.
If the gas furnace is installed in a basement, an excavated
area or a confined space, it is strongly recommended to
contact a gas supplier to install a gas detection warning
device in case of a gas leak. Failure to follow this warning
could result in property damage, personal injury or death.
NOTE: The manufacturer of your furnace does NOT test any
detectors and makes no representations regarding any brand
or type of detector.
