36
W415-0434 / G / 08.08.11
9.0 ADJUSTMENTS
9.1 PILOT BURNER ADJUSTMENT
Adjust the pilot screw to provide properly sized
fl
ame. Turn in a clockwise
direction to reduce the gas
fl
ow.
Inlet pressure can be checked by turning screw (A)
counter-clockwise until loosened and then placing
pressure gauge tubing over the test point. Gauge should
read 7” (minimum 4.5”) water column for natural gas or 13” (11”
minimum) water column for propane. Check that main burner is
operating on “HI”.
Outlet pressure can be checked the same as above using screw (B).
Gauge should read 3.5” water column for natural gas or 10” water
column for propane. Check that main burner is operating on “HI”.
AFTER TAKING PRESSURE READINGS, TIGHTEN SCREWS
FIRMLY TO SEAL. DO NOT OVER TORQUE. LEAK TEST.
39.3
P
I
PILOT
N
O
L
O
T
H
I
L O
F
F O
A
B
PILOT SCREW
PILOT
BURNER
THERMOCOUPLE
THERMOPILE
Air Shutter Openings
Front
LP
1/2”
NG
1/4”
This appliance has an air shutter that has been factory set open according
to the chart below:
Regardless of venturi orientation, closing the air shutter will cause a more
yellow flame, but can lead to carboning. Opening the air shutter will cause a
more blue flame, but can cause flame lifting from the burner ports. The
flame may not appear yellow immediately; allow 15 to 30 minutes for the
final flame colour to be established.
AIR SHUTTER ADJUSTMENT MUST ONLY BE DONE BY A QUALIFIED
INSTALLER!
AIR
SHUTTER
OPENING
VENTURI
BURNER
ORIFICE
49.1
9.2 VENTURI
ADJUSTMENT
The air shutter on this GD70 has been set for the longest horizontal vent length
possible - 20 ft. Failure to adjust the air shutter on shorter vent runs will result in
a much smaller than intended
fl
ame appearance.
The air shutter opening may be adjusted to as little as 1/4” (for propane mod-
els) depending on length and con
fi
guration.
CARBON CAN BE DISTRIBUTED IN SURROUNDING LIVING AREA IF THE AIR SHUTTER IS
IMPROPERLY ADJUSTED.
!
WARNING
49.5
