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22
IO-242C 05/05
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 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 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
thermostat energizing and burner firing.
FURNACE S HUTDOWN
1. Set the thermostat to lowest setting.
2. Turn off the electrical power supply to the furnace.
3. White-Rodgers Models 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.
OUTLET
INLET
Pressure Regulator
Adjustment
(Under Cap Screw)
Gas Valve
On/Off
Selector
Switch
Inlet Pressure Tap
(Side of Valve)
Outlet (Manifold)
Pressure Tap
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
White-Rodgers Model 36G22
NORMAL HEATING SEQUENCE
1. Thermostat calls for heat .
2. The induced draft blower is energized.
3. The igniter is energized and is allowed to preheat.
4. The gas valve is energized delivering gas to the burners
and starting combustion.
5. The control checks for a signal from the flame sensor within
seven seconds after the gas valve is energized. Gas will
only continue to flow if a signal is present.
6. Circulator blower is energized on heat speed following a
fixed thirty second blower on delay . Electronic air cleaner
terminals are energized with circulator blower.
7. Thermostat contacts open when thermostat is satisfied,
completing the call for heat.
8.. Gas valve closes, extinguishing flame.
9. Induced draft blower is de-energized following a two (2) -
second post purge. Humidifier terminals are de-energized.
10. Circulator blower is de-energized following a selectable
heat off delay period (90, 120, 150 or 180 seconds).
Electronic air cleaner terminals are de-energized.
The adjustable delay-off timing allows the installer to customize
the comfort level.
CONSTANT FAN
The continuous fan speed mode provides circulation.
XII. START-UP PROCEDURE AND ADJUSTMENT
Furnace must have a 115 VAC power supply properly connected
and grounded. Proper polarity must be maintained for correct
operation. 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
control module. In the event a furnace component is not operating
properly, the control module LED will flash on and off in a factory-
programmed 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
explanation of the lighting codes.
Follow the start-up and adjustment items, refer to further
information in Section XIII, Operational Checks.
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.
NOTE: An interlock switch prevents furnace operation if the blower
door is not in place. Keep the blower access doors in place
except for inspection and maintenance.
FURNACE S TART-UP
1. Close the manual gas shutoff valve external to the furnace.
2. Turn off the electrical power to the furnace.