Installation manual
M-WRG-II M-U
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Meltem Wärmerückgewinnung GmbH & Co. KG
Am Hartholz 4 · D-82239 Alling
[email protected] · www.meltem.com
VENTILATION THE RIGHT WAY
V E N T I L A T I O N & H E A T R E C O V E R Y
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Planning notes
3.1
Positioning the ventilation unit indoors
The ventilation unit must be installed indoors in a perpendicular position on an external
wall.
—
The flush-mount installation kit (wall box) must be installed so that the openings for
the flexible pipe / flat ductwork connections always point up (see Fig. 4).
—
The flat ductwork system offers considerable freedom when positioning the extract air
and supply air openings and the installation kit. The openings may be made directly
on the installation kit or offset horizontally (item 1 in Fig. 4) or vertically (item 2 in
Fig. 4). This allows the installation kit to be positioned exactly as required (item 3 in
Fig. 4: Minimum distances and options for positioning the M-WRG-II M-U
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installation kit,
dimensions in millimetres
min. 50
min. 300
min. 50 (*)
1
2
3
(*) If a condensate connection (see section 8.14 on page 33) is used, the minimum dimensions must be
adapted to suit the local conditions. This applies, in particular, if condensate is drained inwards, e.g. via a
greywater outlet.
—
The best effect for air exchange is achieved if the supply and extract air openings are
as high up the wall as possible or in the ceiling.
► Maintain the following minimum distances (see Fig. 4 and Fig. 5):
— For this installation kit, the distance between the top edge of the wall box and
the ceiling must be at least 300 mm, otherwise there will not be enough space
for connecting flat ductwork or flexible pipes.
— The distance between the side and bottom edges of the wall box and adjacent
surfaces should be at least 50 mm (exception: if a condensate connection
is used, see (*) in Fig. 4). The ventilation unit will be easier to operate if this
minimum distance is maintained. It also allows the air filter to be replaced
without obstruction.
— Position the supply air and extract air openings so as to avoid a short circuit
between the two airflows. For example, only louvred grilles should be used in
the openings in the arrangement of extract air and supply air openings shown
