Venturi Adjustment; Fl Ame Characteristics - Napoleon Haliburton GDS28-1NSB Installation And Operation Manual

11.2

venturi adjustment

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 carbonization. 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.
note:
It is important that the orifice is securely inserted into the venturi.
GDS28-1
NG 3/8" (9.5mm)
P 5/16" (7.9mm)
11.3 fl ame characteristics
It's important to periodically perform a visual check of
the pilot and burner flames. Compare them to the
illustration provided. If any flames appear abnormal,
call a service person.
VENTURI
BURNER
ORIFICE
3/8" - 1/2"
(9.5mm - 12.7mm)
Flame must envelop
upper
3/8" to 1/2"
(12.7mm - 9.5mm) of
thermocouple &
thermopile
W415-2339 / C / 02.08.21
EN
AIR
SHUTTER
OPENING
37