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7.7. CONNECTING THE UNIT TO THE DUCT SYSTEM
• Never use the unit as a support or weight-bearing structure for ductwork.
• Connect the unit to the air ducts using fl exible connectors to prevent vibrations from
being transmitted to the duct system.
• Check to make sure air intake and fl ow are not being blocked and that there are no
obstacles impeding good air circulation. Failure to do so will affect the effi ciency of
the system.
7.8. ELECTRICAL CONNECTION
IMPORTANT!
To avoid contamination of the fi lters included in the unit, they are supplied in plastic bags.
Prior to the start-up of the unit, it is necessary to remove these bags and reassemble the
fi lters making sure that the air sense matches the one indicated in the fi lter frame.
• Before putting the unit in place, make sure that the nominal supply voltage matches that
listed on the unit's identifi cation plate.
• It should be installed with cables whose cross-section meets current regulations and pre-
vents overheating and voltage drops that exceed permissible limits. Current regulations
must be obeyed, and the designer's instructions must be followed at all times.
• Before connecting the cables, make sure that the electricity is turned off and that there is
no voltage present in any of them.
• The installer must keep the following points in mind when performing the electrical con-
nections:
− After these steps are performed, check to make sure all electrical connections are secu-
re (loose wiring connections can cause irreparable damage).
− As a safety measure, if there is no power to the fan, the necessary interlocks must be
performed so that all other electrical components are also de-energised.
The power supply is made in the external terminal box. In no case it is necessary open the
fan access register during electrical connection work.This record should only be opened
in annual maintenance tasks to verify the state of the fan or in case it requires its replace-
ment.
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