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!
If this is done during the cold weather months, provisions
must be taken to prevent freeze-up of all water pipes and
water receptacles. Failure to follow this warning could result
in property damage.
Whenever your house is to be vacant, arrange to have
someone inspect your house for proper temperature. This
is very important in below freezing weather. If for any
reason your furnace should fail to operate damage could
result, such as frozen water pipes.
CONTROL AND SAFETY SWITCH ADJUSTMENT
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 safety 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
thermostat to a temperature higher than the indicated tempera-
ture to bring on the gas valve. Restrict the airflow by blocking the
return air or by disconnecting the blower. 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 paper or
cardboard from the return air inlet, or reconnect the blower.
AIRFLOW ADJUSTMENT
Check inlet and outlet air temperatures to make sure they are
within the ranges specified on the furnace rating nameplate. If
the airflow needs to be increased or decreased, see the wiring
diagram for information on changing the speed of the blower
motor.
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Disconnect power to the unit before removing the blower
door. Failure to follow this warning could result in property
damage, personal injury or death.
This unit is equipped with a blower door switch which cuts power
to the blower and gas valve causing shutdown when the door is
removed. Operation with the door removed or ajar can permit the
escape of dangerous fumes. All panels must be securely closed at
all times for safe operation of the furnace.
NOTE:
Direct drive motors have bearings which are permanently
lubricated and under normal use, lubrication is not
recommended.
INDOOR BLOWER TIMING
The control module controls the indoor blower. The blower starts
approximately 45 seconds after ignition. The FAN-OFF period is
approximately 100 seconds from the interruption of gas flow.
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).
Pub. No. 41-5010-20
CAUTION
WARNING
Installation Instructions
The following warning complies with State of California law, Proposition 65.
▲
WARNING
!
This product contains fiberglass wool insulation!
Fiberglass dust and ceramic fibers are believed by
the State of California to cause cancer through
inhalation. Glasswool fibers may also cause
respiratory, skin, or eye irritation.
PRECAUTIONARY MEASURES
●
Avoid breathing fiberglass dust.
●
Use a NIOSH approved dust/mist respirator.
●
Avoid contact with the skin or eyes. Wear long-
sleeved, loose-fitting clothing, gloves, and eye
protection.
●
Wash clothes separately from other clothing:
rinse washer thoroughly.
●
Operations such as sawing, blowing, tear-out,
and spraying may generate fiber concentrations
requiring additional respiratory protection. Use
the appropriate NIOSH approved respirator in
these situations.
FIRST AID MEASURES
Eye Contact – Flush eyes with water to remove
dust. If symptoms persist, seek
medical attention.
Skin Contact – Wash affected areas gently with
soap
INSTRUCTIONS TO THE OWNERS
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 compart-
ment (See Figure 16). Also turn off electrical power to the
furnace and contact the service agency designated by
your dealer.
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!
Should overheating occur, or the gas supply fail to shut off,
shut the gas valve to the unit before shutting off the electri-
cal supply. Failure to follow this warning could result in
property damage, personal injury, or death.
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FIRE OR EXPLOSION HAZARD
Failure to follow the safety warnings exactly could result in
serious injury, death or property damage.
Never test for gas leaks with an open flame. Use a commer-
cially available soap solution made specifically for the detec-
tion of leaks to check all connections. A fire or explosion may
result causing property damage, personal injury, or loss of life.
and warm water after handling.
WARNING
WARNING
Page 17
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