START-UP PROCEDURE AND ADJUSTMENT
This furnace must have a 115 VAC power supply properly
connected and grounded. Proper polarity must be maintained for
In addition to the following start-up and adjustment items, refer
to further information in "Operational Checks."
Heat Anticipator Setting
The heat anticipator in the room thermostat must be correctly
adjusted to obtain the proper number of cycles per hour and to
avoid 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
Drain Trap Priming
The drain trap must be primed prior to the furnace start-up. To
prime, fill the drain trap with water.
This ensures proper furnace drainage upon start-up and avoids
the possibility of flue gases escaping through the drain system.
1. Purge the gas lines of air prior to start-up.
NOTE: Be sure not purge lines into an enclosed burner
2. Check for leaks using an approved chloride-free soap and
water solution, an electronic combustible gas detector or
other approved method.
3. Verify that all required kits (propane gas, high altitude, etc.)
have been appropriately installed.
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. Move the furnace gas control valve manual control to the Off
6. Wait 5 minutes, and then check for a gas odor.
NOTE: Check near the floor as some types of gas are heavier
7. If a gas odor is detected, follow the instructions in "Gas
Furnace Safety Precautions" in this manual.
8. If no gas odor is detected, move the furnace gas control valve
manual control to the On position.
9. Replace the burner compartment door.
10. Open the manual gas shutoff valve external to the furnace.
11. Turn on the electrical power to the furnace.
12. Adjust the thermostat to a setting above room temperature.
13. After the burners are lit, set the thermostat to the desired
1. Set the thermostat to the lowest setting.
The integrated control will close the gas control valve and
extinguish the flame. Following a 15-second delay, the
induced draft blower will be de-energized.
After a 100- to 150-second delay period (field-selectable), the
circulator blower de-energizes.
2. Remove the burner compartment door and move the furnace
gas control valve manual control to the Off position.
3. Close the manual gas shutoff valve external to the furnace.
4. Replace the burner compartment door.
Gas Supply Pressure Measurement
To 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
The line pressure supplied to the gas control valve must be within
the range specified below. The supply pressure can be measured
at the gas control valve inlet pressure boss 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.
Gas Control Valve—White-Rodgers 36G54 2-Stage
C. On/Off selector switch
Gas Control Valve—White-Rodgers 36G54 Connected to
A. Open to atmosphere
B. Manometer hose
C. Outlet pressure boss
D. High-fire regulator adjust
E. Regulator vent
F. Low-fire regulator adjust
G. Coaxial coil terminal (M)
H. Common terminal (C)
I. High-fire coil terminal (HI)
J. On/Off selector switch
K. Inlet pressure boss