Hearthstone
Quality
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Heating
Products ,
Inc.
ODEL
8521
Sterling
“G”
B-Vent
15
IGNITOR
PILOT HOOD
LOW MASS
THERMOCOUPLE
THERMOPILE
FRONT BURNER TUBE
PILOT FLAMES
REAR BURNER TUBE
Pilot Adjustments
The pilot light is preset by the manufacturer and
should not need adjustment. The pilot light flame
should be large enough to engulf the thermopile and
thermocouple located just next to the pilot light, but
not so large as to create excessive noise or
consume excessive gas. However, it can be
adjusted by means of the pilot light adjustment
screw located on the gas control valve. Remove the
front lower facade to access.
Note too that the pilot light flame must properly
engulf the thermopile so that the thermopile can
generate sufficient milli-voltage (750mv) to power
the millivolt gas control valve. Control of the Sterling
by the wall-mounted thermostat may become erratic
or non-existent if the pilot light flame is too small or
misdirected away from the thermopile, or the unit
may go out.