Instruction manual

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XII. STXII. ST
XII. STXII. ST
XII. ST
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OCEDURE AND ADOCEDURE AND AD
OCEDURE AND ADOCEDURE AND AD
OCEDURE AND AD
JUSTJUST
JUSTJUST
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MENTMENT
MENTMENT
MENT
Furnace must have a 115 VAC power supply properly connected
and grounded. Proper polarity must be maintained for correct op-
eration. An interlock switch prevents furnace operation if the blower
door is not in place. Keep the blower access door in place except for
inspection and maintenance.
This furnace is also equipped with a self-diagnosing electronic con-
trol module. In the event a furnace component is not operating prop-
erly, the control module LED will flash on and off in a factory-pro-
grammed sequence, depending on the problem encountered. This
light can be viewed through the observation window in the blower
access door. Refer to the Troubleshooting Chart for further explana-
tion of the lighting codes.
On new installations, or if a functional part such as the gas valve,
pressure switch, or limit control has been replaced, verify that the
furnace is operating properly after servicing.
Check furnace operation as outlined in the following instructions. If
any sparking, odors, or unusual noises are encountered, shut off
electrical power and recheck for wiring errors, or obstructions in or
near the blower motors. Various shipping materials must be removed
before the blower motor is operated. In addition to the following
start-up and adjustment items, refer to further information in Section
XIII, Operational Checks.
HEAT ANTICIPATOR SETTING
The heat anticipator in the room thermostat must be correctly ad-
justed to obtain the proper number of cycles per hour and to prevent
“overshooting” of the setting. Set the heat anticipator setting to 0.7
amps. Follow the thermostat manufacturer’s instructions on how to
adjust the heat anticipator setting.
FURNACE OPERATION
Purge gas lines of air prior to start-up. Do not purge lines into an
enclosed burner compartment.
Check for leaks using an approved chloride-free soap and water
solution, an electronic combustible gas detector, or other approved
method. Verify that all required kits (propane gas, high altitude, etc.)
have been appropriately installed.
FURNACE START-UP
1. Close the manual gas shutoff valve external to the furnace.
2. Turn off the electrical power to the furnace.
3. Set the room thermostat to the lowest possible setting.
4. Remove the burner compartment door.
NOTE: This furnace is equipped with an ignition device which
automatically lights the burner. Do not try to light the burner by hand.
5. White-Rodgers Models 36E22/36F22/36G22: Push the switch
to the OFF position.
6. Wait five minutes to clear out any gas. Then smell for gas,
including near the floor.
7. If gas can be smelled following the five minute waiting period
in Step 6, immediately follow the instructions on Page 4 of
this manual. If you do not smell gas after five minutes:
White-Rodgers Models 36E22/36F22/36G22: Push the switch
to the ON position.
8. Replace the door on the front of the furnace.
9. Open the manual gas valve external to the furnace.
10. Turn on the electrical power supply to the furnace.
11. Set the room thermostat to the desired temperature.
NOTE: There is an approximate 20 second delay between thermo-
stat energizing and burner firing.
FURNACE SHUTDOWN
1. Set the thermostat to lowest setting.
2. Turn off the electrical power supply to the furnace.
3. White-Rodgers Models 36E22/36F22/36G22: Push switch
to the OFF position.
4. Close manual gas shutoff valve external to the furnace.
5. Replace the door on the unit.
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INLET
Pressure Regulator
Adjustment
(Under Cap Screw)
Inlet Pressure Tap
(Side of Valve)
Outlet (Manifold)
Pressure Tap
(Side of Valve)
Gas Valve
On/Off
Selector
Switch
OUTLET
Figure 23 - White-Rodgers Model 36E22
OUTLET
INLET
Pressure Regulator
Adjustment
(
Under Cap Screw
)
Gas Valve
On/Off
Selector
Switch
Inlet Pressure Tap
(Side of Valve)
Outlet (Manifold)
Pressure Tap
Figure 24 - White-Rodgers Model 36F22
Pressure Regulator
Adjustment
(Under Cap Screw)
Gas Valve
On/Off
Selector
Switch
INLET OUTLE
T
Inlet Pressure
Tap
Outlet Pressure
Tap
Figure 25 - White-Rodgers Model 36G22
GAS SUPPLY PRESSURE MEASUREMENT
operating.
CAUTION
T
O PREVENT UNRELIABLE OPERATION OR EQUIPMENT DAMAGE, THE INLET
GAS SUPPLY PRESSURE MUST BE AS SPECIFIED ON THE UNIT RATING PLATE
WITH ALL OTHER HOUSEHOLD GAS FIRED APPLIANCES OPERATING.
The line pressure supplied to the gas valve must be within the range
specified below. The supply pressure can be measured at the gas
valve inlet pressure tap or at a hose fitting installed in the gas piping
drip leg. The supply pressure must be measured with the burners
operating. To measure the gas supply pressure, use the following
procedure.