23NIBE PB 10
Miscellaneous
Accessories
Draft limiter
The draft is dependent on the chimney's cross-section,
height, position of the building, wind conditions, outdoor
temperature, boiler output, flue gas temperature and soot
build-up.
The majority of today's boilers are installed on and con-
nected to older chimneys. Sometimes the chimneys have a
cross-section and insulation that is not suitable for replace-
ment between different fuels.
Great deviations in draft can cause different conditions in
the boiler's firebox. To minimize this as well as the risk of
any damage caused by condensation in the chimney, there
is draft limiter available as an accessory that can be in-
stalled on the boiler's flue pipe.
Part No 089 864
RSK No. 621 07 41
Installing the draft limiter for chimneys
The draft limiter has a newly developed design that makes
installation on the flue pipe possible in all positions.
Vertical, angled as well as horizontal. The draft limiter is
installed on an adjustable panel that replaces the existing
soot door.
Adjusting vacuum
Adjust the vacuum when the door is opened by pressing
the clamp together in which the weight is located and
move it along the shaft. Alter the vacuum by 1 Pa per 2
mm, when moving the weight. These are approximate
values and must be checked using a draft gauge if exact
values are required. Upon delivery, the door is set at 10 Pa.
At the correct setting, the door must open smoothly and
evenly when the burner is not in operation.
Adjusting the balance shaft
After installation, slacken off the two locking screws slight-
ly and turn the balance shaft so that it is horizontal when
the door is closed. Then tighten the screws.
LEK
Lock screws
LEK
LEK
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