Intended Use; Preparatory Work - Zehnder ComfoAir 70 Instructions De Montage

Round mounting block

Intended use

The round mounting block consists of a PVC pipe
and two dust covers (Fig. 1). It is used to hold
the ComfoAir 70 ventilation unit. A core hole of
270 mm (10 5/8 inch) must be provided through
the exterior wall for installing the mounting block.
The final wall thickness must be within a range
of min. 275 mm (10 13/16 inch) to max. 600 mm
(23 5/8 inch) or 900 mm (35 1/2 inch) with
extension set.

Preparatory work

Select a suitable installation location in an ex-
terior wall.
The location of the ComfoAir 70 must
meet all local and national code
requirements. Ensure that proper clearance is
provided to other fixtures in bathrooms or other
"wet" rooms.
Ensure that
available for
Fig. 1 – mounting block
6
there is sufficient
the ComfoAir 70
mounted
(at least 32 cm (12 5/8 inch) on the left, 42 cm (19
9/16 inch) on the right and 55 cm (21 7/10 inch)
above, all measured from the centerline of the
ø
core hole).
Ensure a minimum clearance of 80 cm (31 1/2
inch) in front of the interior surface of the wall to
allow for the ComfoAir 70 to be moved in and
out of the pipe during installation and future
maintenance.
Core hole drilling
A plumb wall is required.
The cored hole must measure at least
270 mm (10 5/8 inch).
The cored hole must be level and hori-
zontal through the exterior wall. (Fig. 2)
space
to be
Fig. 2 – core hole drilling
and for routine maintenance