24
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
.
F
URNACE
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.
F
URNACE
S
TART
-
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.
Move the furnace gas valve manual control to the OFF
position.
6.
Wait five minutes then smell for gas. Be sure check near
the floor as some types of gas are heavier than air.
7.
If you smell gas after five minutes, immediately follow the
instructions on page 3 of this manual. If you do not smell
gas after five minutes, move the furnace gas valve manual
control to the ON position.
8.
Replace the burner compartment door.
9.
Open the manual gas shutoff valve external to the furnace.
10. Turn on the electrical power to the furnace.
11. Adjust the thermostat to a setting above room temperature.
12. After the burners are lit, set the thermostat to desired
temperature.
NOTE:
There is an approximate 40 second delay between
thermostat energizing and burner firing.
F
URNACE
S
HUTDOWN
1.
Set the thermostat to lowest setting.
2.
Turn off the electrical power supply to the furnace.
3.
Remove the burner compartment door and move the
furnace gas valve manual control to the OFF position.
4.
Close manual gas shutoff valve external to the furnace.
5.
Replace the burner compartment door.
G
AS
S
UPPLY
P
RESSURE
M
EASUREMENT
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.
W
HITE
-R
ODGERS
36G54 G
AS
V
ALVE
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 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.
On/Off Switch
Inlet
Pressure Boss
High Fire
Coil Terminal (HI)
Low Fire
Regulator Adjust
Manometer
Manometer
Hose
A
High Fire Regulator
Adjust
Regulator
Vent
Common
Terminal (C)
Coaxial Coil
Terminal (M)
Outlet
Pressure Boss
Open to
Atmosphere
White-Rodgers Model 36G54 Connected to Manometer
1.
Turn OFF gas to furnace at the manual gas shutoff valve
external to the furnace.
2.
Connect a calibrated water manometer (or appropriate gas
pressure gauge) at either the gas valve inlet pressure boss
or the gas piping drip leg.
