Adjustments; Gas Pressure Adjustment; Venturi Adjustment; Flame Characteristics - Napoleon GSST8N Installation And Operating Instructions Manual

8.0 ADJUSTMENTS

8.1

GAS PRESSURE ADJUSTMENT

Outlet pressure can be adjusted if not measuring 3.5" W.C. (NG)
or 10.0" W.C. (LP).
A. Pressure can be checked by removing cap (A) using a
3/16 Allen key and replacing it with a 1/8 NPT barb ¿ tting.
B. Place pressure gauge tube over the ¿ tting.
C. Pressure can be adjusted by removing cap (B) using a
À at screwdriver, and adjusting the nylon plug with the
same screw driver. Turning
the plug in (clockwise) will
increase the pressure.
8.2

VENTURI ADJUSTMENT

This model has an air shutter that has been factory set open according to the chart below:
Closing the air shutter will cause a more yellow À ame, but can lead to carboning.
Opening the air shutter will cause a more blue À ame, but can cause À ame lifting
from the burner ports. The À ame may not appear yellow immediately; allow 15
to 30 minutes for the ¿ nal À ame color to be established.
AIR SHUTTER ADJUSTMENT MUST ONLY BE DONE BY A QUALIFIED
INSTALLER!
NOTE: It is important that the venturi sits down tight on the orifi ce.
AIR SHUTTER OPENINGS
LP 3/16" DIA
NG 1/16" DIA
8.3

FLAME CHARACTERISTICS

It is important to periodically perform a visual check of the burner À ame. Compare them
to the illustration provided.
NPT BARB
1/8"
1/4"
1/8
FITTING
A
PRESSURE
GAUGE
3.5
10
VENTURI
BURNER
AIR
SHUTTER
OPENING
49.3
W415-0689 / C / 06.13.12
19
NATURAL
GAS
PROPANE
GAS