Page 6
R-1923
Proper Pilot Flame
The correct flame will be almost horizontal, blue and will extend past
the thermocouple 1/4" (6mm). The flame will surround the
thermocouple just below the tip.
On Propane (LP-gas) slight yellow might occur where the pilot flame
and the burner flame meet.
Natural gas pilots require adjusting when the inlet pressure is above
5" w.c. (1.25kPa). Remove pilot adjustment cover. Turn adjustment
screw clockwise to reduce flame.
Propane (LP-gas) will not require adjusting.
Proper Main Burner Flame
There will be a short blue inner flame with a larger, lighter blue
secondary flame. The burner flame may have yellow tips when hot.
Dust in the combustion air will produce an orange or red flame. Do
not mistake the orange or red flame for an improper yellow flame.
The flame will be proper if the factory-set pressure and orifice are
used. After use, cleaning may be required for the proper flame.
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
removed.
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.
Cleaning Combustion Chamber
A qualified serviceman should remove the chamber and apply air pressure
to the inside in order to clear all passageways.
Thermostat Operation
To turn on burner, rotate dial knob toward setting number 9. To shut
down burner, rotate dial knob toward setting number 1.
The dial numbers 1 to 9 correspond to 58
°
to 90
°
F (14
°
to 32
°
C). This
is the temperature at the bulb thermostat not the room temperature.
The owner is advised to determine the particular heat setting that is
desired for comfort, as heating requirements are different for every
owner.
Attention: When the dial knob is turned below number 1, to the
white indicator mark and the bulb temperature drops to 55
°
F (13
°
C),
the thermostat will call for heat and the main burner will ignite.
If no heat is desired, turn the gas control knob to the PILOT position.
Primary Air Adjustment
1. A primary air adjustment bolt is located on left, front 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.
2. An air shutter bracket is attached to top of 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.
On Propane gas, if a whistling noise (resonation) occurs screw
the air adjustment bolt into the burner throat to eliminate the
whistling noise (resonation).
3/16" (5mm)
