Electrical Connection; Commissioning; Maintenance; Temperature Protection - Zehnder VDA EExe Serie Bedienungsanleitung

8. Electrical connection

The roof extract fans must be
�
connected according to the locally
applicable regulation and the enclosed
wiring diagrams;
The power supply cable can be fed
�
through a cable gland in the base from
inside or over the roof;
The connection is on the exterior
�
operating switch or connection box.
Components with an ATEX classification
must not be changed in any manner
whatsoever. The diagram number on the
identification plate in the 'S...' section
(bottom right) must match the number of
the supplied wiring diagram.
For motor specifications, see the
�
enclosed motor certificate;
The motor must be protected against
�
overloading or overheating (by 1 for
direct starting, by 1 or 2 for star-delta
starting) through the use of a multi-
pole, current based overload protection
device (motor protection switch);
The roof extract fan must be protected
�
against short circuiting by a fuse or fuse
unit (LS), multi-pole;
If additional earthing is required, it must
�
be connected to the external earthing
connection (bolt) of the motor casing.
9. Temperature
protection
The temperature protection takes
�
place by means of a motor protection
switch. Once the protection device has
come into operation, it may no longer
automatically restart the motor;
20 - EN
The protection device must be set in
�
such a way that it both protects the
nominal current and switches off the
blocked motor within the tE time, in the
given IA/IN ratio.

10. Commissioning

Check whether the impeller moves
�
freely;
Check whether the diagram number of
�
the enclosed wiring diagram matches
the diagram number given on the
identification plate in field 'S...' (bottom
right);
Check the electrical connection on the
�
basis of the information in the enclosed
wiring diagram;
The roof extract fan must not be started
�
until the 'contact safety device' of the
impeller has been set;
Turn on the fan briefly to check which
�
way the impeller turns;
The rotating direction is given on the
�
outside of the housing with an arrow.
If it turns in the wrong direction, two
supply connection clamps (L1 and L3)
need to be switched.

11. Maintenance

The VDA EExe must be cleaned and
�
inspected at least once every 2 years.
Any faults or defects indentified during
this inspection must be rectified
immediately;
The bearings of the motor must be
�
replaced at least every 10 years;
A full inspection must be carried out as
�
soon as a noticeable defect occurs.