69-0844—1 10
GAS LEAK TEST
1. Paint all pipe connections upstream of the gas control
with a rich soap and water solution. Bubbles indicate a gas
leak.
2. If a gas leak is detected, tighten the pipe connection.
CAUTION
Stand clear while lighting main burner to prevent
injury caused from hidden gas leaks that could
cause flashback in the appliance vestibule.
3. Turn on the system by rotating the gas control knob
counterclockwise to ON.
4. Light the main burner by following the appliance
manufacturerinstructionsorturningupthethermostattocall
for heat.
5. Withthemainburnerinoperation,paintallpipejoints
and gas control inlet and outlet with a rich soap and water
solution.
6. If another gas leak is detected, tighten joints and pipe
connections.
7. Ifgasleakcannotbestopped,turnthegascontrolknob
clockwise to OFF.
8. Replace the leaking part.
9. Perform the gas leak test.
ADJUST THE PILOT BURNER FLAME (INTER-
MITTENT PILOT IGNITION ONLY)
The pilot flame should envelop 3/8 to 1/2 in. [10 to
13 mm] of the igniter-sensor tip. See Fig. 11. To adjust the
pilot flame:
1. Remove the pilot adjustment cover screw. Refer to
Fig. 3.
2. Turn the inner adjustment screw clockwise to
decrease or counterclockwise to increase pilot flame.
3. To prevent gas leakage, always replace the cover
screw after adjustment.
Fig. 11—Proper flame adjustment.
CHECK AND ADJUST GAS INPUT TO MAIN
BURNER
CAUTION
1. Do not exceed the input rating stamped on the
appliance nameplate, or manufacturer recom-
mended burner orifice pressure for the size
orifice(s) used. Make certain the primary air
supply to the main burner is properly adjusted
for complete combustion (refer to the appli-
ance manufacturer instructions).
2. WHEN CHECKING GAS INPUT BY
CLOCKING THE GAS METER:
• Makesurethat the only gas flowthroughthe
meter is that of the appliance being checked.
• Makecertainthatotherappliancesareturned
off with pilot burners extinguished (or de-
duct that gas consumption from the meter
reading).
• Convertthe flow rate to Btuhas described in
Gas Controls Handbook, form 70-2602, and
compare to the Btuh input rating on the
appliance nameplate.
3. WHEN CHECKING GAS INPUT WITH A
MANOMETER (PRESSURE GAUGE):
• To connect the manometer, be sure the gas
control knob is in the OFF position before
removing the outlet pressure tap plug.
• Whenremovingthemanometer,turn the gas
control knob back to OFF and replace the
outlet pressure tap plug.
• Shut off the gas supply at the appliance
service valve, or at the gas tank for LP gas,
before removing the outlet pressure tap plug
andbeforedisconnectingthemanometerand
replacing the outlet pressure tap plug.
• Perform the Gas Leak Test at the outlet
pressure tap plug.
Standard-Opening Pressure Regulator
1. The gas control outlet pressure should match the
manifold pressure listed on the appliance nameplate.
2. With the main burner operating, check the gas control
flow rate by using the meter clocking method or check the
gaspressureusinga manometer connected to the gascontrol
outlet pressure tap. See Fig. 3.
3. Ifnecessary,adjustthepressureregulatortomatchthe
appliance rating. Refer to Table5 for the factory set nominal
outlet pressures and adjustment setting ranges.
a. Remove the pressure regulator adjustment cap screw.
b. Using a screwdriver, turn the inner adjustment screw
clockwise toincreaseorcounterclockwise to
decrease the main burner gas pressure.
c. Always replace the cap screw and tighten firmly to
safeguard proper operation.
4. If the desired outlet gas pressure or gas flow rate
cannot be achieved by adjusting the gas control, check the
gas control inlet pressure by using a manometer at the inlet
pressuretap.Iftheinletpressureisin the normal range (refer
to Table 5), replace the gas control. Otherwise, take the
necessary steps to provide proper gas pressure to the gas
control.
PROPER FLAME
ADJUSTMENT
IGNITER-
SENSOR
M3080A
3/8 TO 1/2 INCH
[10 TO 13 mm]
