—2—
still does not light, the time delay is repeated. If the burner
does not light within 15 minutes, there is a lockout. If burn-
ers still do not light, call for service.
XI. Step 11
Set the temperature selector on room thermostat to desired
setting.
TO SHUT UNIT OFF
Refer to Fig. 3 while proceeding with the following steps.
I. Step 1
Set room thermostat to lowest temperature setting and set
SYSTEM switch to OFF position.
II. Step 2
Close the external manual gas valve.
III. Step 3
Turn off the electrical power supply to unit and install lock-
out tag.
IV. Step 4
Remove the burner access panel.
V. Step 5
Move the control on the gas valve to the OFF position.
VI. Step 6
Replace the burner access panel.
VII. Step 7
If unit is being shut down because of a malfunction, call your
dealer as soon as possible.
If unit is being shut down because the heating season has
ended, restore electrical power to the unit to ensure opera-
tion of the cooling system during the cooling season.
Should overheating occur, or the gas supply fail to shut off,
shut off the manual gas valve to the unit before shutting off
the electrical supply.
Do not use this unit if any part has been under water. Imme-
diately call a qualified service technician to inspect the unit
and to replace any part of the control system and any gas
control which has been under water.
MAINTAINING YOUR UNIT
All maintenance should be handled by skilled, experienced
and qualified personnel. Your dealer can help you establish a
standard procedure.
For your safety, keep the area around the unit clear and free
of combustible materials, gasoline, and other flammable liq-
uids and vapors.
To ensure proper functioning of the unit, flow of combustion
and ventilating air must not be prevented from reaching the
unit. Clearance of at least 3 ft on size 036-072 units and 4 ft
on size 090-150 units on the flue and condenser sides and
6 in. on all other sides is required. A clearance of 5 ft is
required above the condenser discharge.
ROUTINE MAINTENANCE AND CARE
FOR THE EQUIPMENT OWNER
Consider the following information before maintaining or
servicing equipment:
WARNING: If the main burners fails to light, or
the blower fails to come on, shut down gas heating sec-
tion and call your dealer for service. Failure to follow
these requirements could result in serious personal
injury.
WARNING: Do not turn off the electrical power to
unit without first turning off the gas supply.
Failure to follow this procedure can result in serious
fire or personal injury.
WARNING:
1. TURN OFF GAS SUPPLY AND THEN ELECTRI-
CAL POWER TO YOUR UNIT BEFORE SERVIC-
ING OR PERFORMING MAINTENANCE.
2. Do not turn off electrical power to this unit with-
out first turning off the gas supply.
3. When removing access panels or performing main-
tenance functions inside your unit, be aware of
sharp sheet metal parts and screws. Although spe-
cial care has been taken to reduce sharp edges
inside the unit, be extremely careful when han-
dling parts or reaching into the unit.
GAS VALVE
Fig. 1A — Gas Valve Location (Sizes 036-072)
Fig. 1B — Gas Valve Location (Sizes 090-150)
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