Valor Horizon 534ILN Installation And Operation Instructions Manual page 21

Air Restrictors Fitting
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.
A restrictor set, shown right, is supplied with each 534 engine unit. The
restrictors cover part of the inlet air openings in the fi rebox rear wall
behind the rear log support.
The restrictor is assembled with an adjustable piece which can be moved
to different 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.
Appliance
Vent terminal
vent outlet
Horizontal Top
through wall
with vertical
rise
Appliance Preparation
Vertical vent Use restrictor
pipe run setting
Less than
3' (91 cm) to
6' (183 cm)
From
6' (1.83 m) to
20' (6.1 m)
From
20' (6.1 m) to
40' (12.2 m)
Air Restrictor Assembly
Appliance Vertical vent
Vent terminal
vent outlet
Horizontal Rear Less than
through wall 3'6" (107 cm)
with vertical to 6' (183 cm)
rise
From
6' (1.83 m) to
20' (6.1 m)
From
20' (6.1 m) to
40' (12.2 m)
Appliance Vertical vent
Vent terminal
vent outlet
Vertical Top or rear Less than
through roof 20' (6.1 m)
From
20' (6.1 m) to
40' (12.2 m)
Use restrictor
pipe run setting
Use restrictor
pipe run setting
Adjustable
piece
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