35
Position #1
Position #2
Position #3
Position #4
INSTALL HERE
Restrictors
The restrictors are not required when less than 1’-0”
vertical rise in vent system.
Install the restrictors in the roof of the fi rebox behind
the top liner panel. Adjust the restrictors before
installation of the top liner panel. Should subsequent
adjustment be required, you will need to remove the
top liner panel—see page 52.
MOST INSTALLATIONS REQUIRE RESTRICTORS
for improved fl ame picture and performance. This
unit is supplied with restrictors having four different
positions or settings. The level of restriction required
depends on the vertical rise in the venting system and,
to a lesser degree, the horizontal run and number of
elbows.
The amount of restriction is based on laboratory tests.
The ideal restrictor position may vary slightly, especially
when the vent pipe length is near the limits of the
acceptable confi gurations for each type of restrictor.
The chart on the previous page shows the vent
restrictor positions required relative to the length of the
vent pipe.
To set the restrictors position:
1. Establish the required position of the restrictors
looking up the venting table on the previous page.
2. Fasten the restrictors using the
screws (2) already installed on
each side of
the
fi
rebox roof
ports
.
3. Slide the restrictors in the required
position.
4. Tighten the screws.
Co-axial Venting
QUALIFIED
INSTALLER
