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6. Transportation
The roof extract fans must be horizontally
transported and may only be lifted by the
bottom cover (pos. 12) or the base (pos.
13), see figure below.
5
6
8
9
4
10
7. Installation
Assembly
The following procedures must be
followed during assembly:
In order to avoid the impeller working
�
out of true, the roof extract fans may
only be horizontally mounted;
Mounting must take place according to
�
the example given (see fig. 1. 2 and 3);
We therefore recommend the use of a
�
Zehnder mounting curb;
The situation must be avoided in which the
�
air flow takes place asymmetrically. (See
figure 3).
Figure 1
2
1
3
11
15
14
7
12
13
Figure 2
A weatherproof seal must be fitted
�
under the roof extract fans, for airtight
mounting;
When mounted on an unlevel base, the
�
distance between the impeller and the
ventilator housing may change in such
a manner that it affects the explosion
safety of the roof extract fan. Mounting
on an unlevel base can also result in
other problems.
Figure 3
EN - 19
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