14
Venting
Co-Axial
Restrictors
SOME INSTALLATIONS REQUIRE RESTRICTORS. For
improved
fl
ame picture and performance, this unit is
supplied with two di
ff
erent sets of vent restrictors. 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 set may vary, especially when the
vent pipe length is near the limits of the acceptable
con
fi
gurations for each type of restrictors.
The chart on page 12 shows the vent restrictor required
relative to the length of the vent pipe.
Restrictors are not required for co-linear applications.
To install restrictors:
1. Remove every second screw from the exhaust ports
in the top of the
fi
rebox.
2. Install the restrictors with the removed screws.
50
75
Restrictor 50
Restrictor 75
OR
INSTALL RESTRICTORS HERE
