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Andrews FASTflo WH42 Installation Manual, Operation And Maintenance Manual Page 33

Continuous flow wall hung balanced flue heaters for natural gas and lpg.
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3) Adjusting the flue terminal length
Make sure the flue terminal has been set to the appropriate length and the outlet is oriented
properly to prevent combustion and operation problems.
The length of the flue terminal must be
adjusted to fit with the wall thickness before
the installation is completed.
Standard projection
length: 75 mm
The red line should be visible.
The red rectangle should not be
visible from the outdoor.
Remove this screw and slide
out the external cylinder.
4) Attach the flue terminal to the wall flange.
Fill in clearance with
* Installation pattern (3) yields a clearance between the flue terminal and
the wall surface. Fill this clearance with a high temperature sealant.
External wall surface
<Screw positions>
The sleeve length can be
adjusted in increments
of 10 mm.
The following figure shows installation pattern (1).
Note: If the flue terminal will be installed in
orientations (2) or (3) from the table on the
previous page, the outlet cylinder will have
to be rotated so that it is oriented properly.
The following figure shows the points to screw the
cylinder to for the different installation orientations.
Screwing position for
installation pattern (3)
Wall flange
Wind packing along the red
rectangle only for wall thicknesses
of 370 mm to 690 mm.
Wing nut
05.10.4, 1:35 PM
Screwing position for
installation pattern (2)
Installation pattern (1),
as is with shipment
Flue Terminal


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