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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.
MAIN BURNER FLAME CHARACTERISTICS
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 and 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.
Page 10
PILOT FLAME CHARACTERISTICS
On Propane gas, if a whistling noise (resonation) occurs
a. Screw the air adjustment bolt into the burner throat to elimi-
nate the whistling noise (resonation).
b. Size main burner orifice with a drill bit. For RH-50(C) use
#47 drill bit. For RH-65(C) use 2.3mm drill bit.
Primary Air Adjustment see page 11.
Figure 6
Figure 5
12822-5-0709
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