13
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
2.
Adjust the pilot screw to provide properly
sized pilot flame
(Figure 30 )
. Turn counter
clockwise to enlarge pilot flame and clockwise
to reduce the pilot flame. DO NOT attempt to
adjust pilot flame more than one half turn.
3.
Replace the pilot adjustment cap.
Replace logs if removed for pilot inspection.
To light the burner; rotate the gas valve control
knob counterclockwise to the “ON” positionand
then turn “ON” the remote wall switch.
Electronic Appliance Checkout
The gas control system on these appliances is
an electronic low voltage gas control valve
with an intermittent ignitor. It consists of a low
voltage gas control valve, an intermittent igni-
tion system, an electronic control module,
transformer and a burner assembly. A tem-
perature limit switch is wired in series with the
gas control valve. If a higher than normal
temperature is sensed, due to a blocked vent
or prolonged downdraft, the limit switch will
open and cause the burner to shut off.
The pilot flame should be steady, not lifting or
floating. Flame should be blue in color with
traces of orange at the outer edge.
To light the burner, push the gas control lever
in and toward the left to the “ON” position.
Turn ‘ON’ the remote wall switch. Ensure the
ignitor lights the pilot. The pilot flame should
engulf the ignitor.
Step 11. Safety Limit Switch Operation
MANUALLY-RESET BLOCKED FLUE SAFETY
SWITCH
These appliances are equipped with a manu-
ally-reset blocked flue safety switch. Refer
to
Figures 31 and 32
for their location. If
during appliance operation, the flame goes
out (independently of the burner on/off wall
switch), it may be due to the operation of
the safety limit switch. First
allow the
appliance to coo
l. Then reset the safety
switch by pushing the red reset button on the
back of the switch.
CAUTION: THE ELECTRONIC APPLIANCE
SHOULD BE TURNED OFF BEFORE REMOV-
ING THE LIMIT SWITCH.
Figure 31 (GHC/GRD-5500)
Figure 32 (GHC/GRD-6500)
Limit Switch Screws
Manual Reset Limit Switch
Lintel
Extention
Firebox Wrapper
Limit
Switch
Screws
Manual Reset Limit Switch
Lintel Extention
Fireplace Front
To access the safety limit switch reset button,
remove the two screws. Pull out limit switch
with low voltage wires attached, push the reset
button, then reinstall the limit switch. At this
time turn the electronic appliance back on.
The appliance should then relight and remain
lit. If this does not occur,
turn off the appli-
ance and call a qualified service technician
.
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