
TC36STD2
Opening
Vent
restrictor
Figure 44: Vent restrictor.
WALL AND ROOF
TERMINATION
RESTRICTOR POSITION
12'
10'
30'
40'
48'
6'
4'
2'
0'
8'
30'
18"
4'
20'
22'
18'
20'
FULLY OPEN
3" OPEN
2" OPEN
3/4" OPEN LP
10'
0'
1" OPEN NG
6'
8'
10'
12'
14'
16'
18'
20'
Figure 43: Restrictor rise
and run chart.
28
100000438-50 091418-41
Vent Restrictor Adjustment
CAUTION: The vent restrictor
must be fully open when using the
power vent
The vent restrictor is located on the underside of the firebox top. The
unit leaves the factory with the vent restrictor open. The restrictor is
built into the appliance for secondary air flow adjustment. Adjustment
enables tuning the airflow for optimum flame appearance and
performance for a wide variety of vent configurations.
Setting:
• Determine the vent height.
• Determine the vent horizontal length.
• From the chart determine the restrictor position.
Refer to the chart (Figure 43), for the correct position of restrictor for the
vent configuration of your installation. Restrictor positions are based
upon lab tests. The ideal position may vary slightly with installation.
Restrictor position is closed too much if the flame has the following
characteristics:
• Flame is excessively tall and lifting.
• Flame lacks movement.
• Flame soots.
Restrictor position is too open if the flame has the following
characteristics:
• Flame height is low.
• Flame has excessive movement.
To adjust the restrictor:
• Loosen the screws holding the restrictor plates.
• Move the restrictor plates to its intended opening.
• Retighten the screws.