25
Co-Axial Venting
Attaching Air Restrictors—Appliances with Vertical Vent Rise Only
No restrictors are required for appliances which only have a horizontal vent run.
If installing an appliance which has a rear vent outlet connection and no vertical
vent pipe rise, ignore this stage.
Two restrictor sets, like the one shown right, are supplied with each 530 engine unit.
The restrictors cover part of the
inlet air openings
in the
fi
rebox
rear wall
on each
side of the brick support.
Do NOT install the restrictors in the roof of the
fi
rebox!
Each set is assembled with an adjustable piece which can be moved to different
positions depending of the vent con
fi
guration. See the table below to
fi
nd out which
position is optimal for each type of installation.
• To
fi
t the restrictors, loosen the two center screws of the left and right inlet ports.
Place the restrictor assembly under the screw heads and tighten the center screws.
• To set the adjustable restrictor piece, loosen the two screws, position the adjustable
piece according to the diagram below and tighten the screws.
Adjustable
piece
DO NOT
INSTALL HERE
!
INSTALL HERE
Air Restrictor
Install restrictors in the
inlet air openings
in the
fi
rebox rear wall
behind the rear
log support.
Vent terminal
Vertical vent
pipe run
Use restrictor setting
Logs/Rocks
Coals
Horizontal
through
wall (WITH
vertical rise)
Less than 4 ft
(122 cm)
More than 4 ft
(122 cm)
Vertical
through roof
Note:
NO
restrictors
required
with straight
out rear
venting
QUALIFIED
INSTALLER