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Cleaning Pilot Burner
After use, cleaning of the pilot burner may be required for
the proper flame. The pilot orifice can be cleaned with high
pressure air or by placing under running water. Pilot orifice
must be dry before replacement. Use a pipe cleaner to
clean inside the pilot after the pilot orifice has been re-
moved.
Removing Pilot Orifice
1. Disconnect the pilot supply line at the pilot burner
2. Remove pilot orifice from pilot burner. It may be necessary
to tap on pilot burner in order to remove the pilot orifice.
Cleaning Main Burner
Remove the burner and apply water pressure inside the throat
of the burner and down into the ports; follow with air pressure.
Removing Main Burner
1. Remove casing front.
2. Disconnect pilot bracket from the burner.
3. Remove brass nut from burner.
4. Disconnect burner from chamber leg flange.
5. Remove burner from bottom of combustion chamber.
1. Impossible to light pilot
a. If using Piezo ignitor, check electrode location.
b. Remove nut at orifice and check for gas.
c. If gas available, check for blocked orifice or pilot.
2. Pilot outage
a. Proper size of pilot flame.
b. Defective or weak thermocouple.
3. Pilot flames but goes out
a. Pilot flame not covering the thermocouple properly
when knob is released.
b. Defective thermocouple.
c. Defective magnet in the safety section of valve.
4. Poor thermostatic control
a. Thermostat needs calibrating.
b. Defective thermostat section.
5. Noisy blower
a. Tighten blower screws.
b. Check blower wheel in the open for balance.
6. Yellow main burner flame
a. Remove main burner to check for obstructions in
throat, ports and orifices.
b. Install new main burner orifice and pilot orifice
c. Check gas valve for leaking.
d. Open the air bolt on the main burner in order to in-
crease the amount of primary air.
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MAINTENANCE
Cleaning Combustion Chamber
A qualified serviceman should remove the chamber and apply
air pressure to the inside in order to clear all passageways.
Primary Air Adjustment
1. A primary air adjustment bolt is located on left, front
2. An air shutter bracket is attached to top of burner throat.
On Propane gas, if a whistling noise (resonation) occurs,
screw the air adjustment bolt into the burner throat to
eliminate the whistling noise (resonation).
TROUBLESHOOTING
7. Yellow pilot flame
8. Pilot and main burner go out after burning a few
9. Burner back-flashes or 'pops' and burns and main
10. Inoperative blower
of burner throat. The bolt can be screwed into burner
throat to REDUCE primary air or unscrewed from burner
throat to INCREASE primary air. To reduce yellow flame
on main burner, unscrew bolt from burner throat. Also,
refer to Step 2. To reduce resonation (whistling) noise or
extinction (popping) noise, screw bolt into burner throat.
The air shutter bracket lays flat across top of burner throat.
If yellow flames can not be removed from main burner by
using primary air adjustment bolt, the air shutter bracket
can be pivoted upward to allow additional primary air to
enter burner throat.
a. Small yellow tip not objectionable.
b. Remove pilot orifice. Check and clean.
minutes
a. Improper venting of flue products. Relight and check
for improper venting.
b. If vented properly, check vent safety switch, replace
if defective.
burner orifice.
a. Examine burner for defects.
a. Check fan control by shorting across terminals.
b. Check for blower wheel bind by removing wheel and
operating motor.
c. Check for frozen bearings due to lack of oil.
31910-4-0115
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