33
Re-install Rear Log Support
Refi t the rear log support in place (5 screws).
Adjustable
piece
Air Restrictor Assembly
Vent terminal
Appliance
vent outlet
Vertical vent
pipe run
Use restrictor
setting
Horizontal
through wall
with vertical
rise
Top or Rear Less than
6’ (183 cm)
From
6’ (1.83 m) to
20’ (6.1 m)
From
20’ (6.1 m) to
40’ (12.2 m)
Vent terminal
Appliance
vent outlet
Vertical vent
pipe run
Use restrictor
setting
Vertical
through roof
Top or rear Less than
20’ (6.1 m)
From
20’ (6.1 m) to
40’ (12.2 m)
Install Air Restrictors
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 at right, are supplied with each 650 engine unit.
The restrictors cover part of the
inlet air openings in the fi rebox rear wall behind the
rear log support.
Do NOT install the restrictors in the roof of the fi rebox!
Each restrictor set includes an adjustable piece which can be moved to diff erent
positions depending of the vent confi 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.
DO NOT INSTALL HERE!
INSTALL HERE
No vertical
rise = NO
restrictor
Installation
QUALIFIED
INSTALLER
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