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4.2.2 - The nTC controller
For the overall dimensions please refer to the diagram
below.
Dimensions of the NTC controller, mm
4.2.3 - The user interfaces
Four user interfaces are available that can be connected to
the controller. The detailed description of each user interface
is given in a separate user notice.
The controllers do not always have a user interface connected
(example: open-plan offices).
4.3 - Wiring/installation diagrams
NOTE: A number of connections has been made in the
factory. Their description is included for information for
maintenance requirements.
As a general rule only the following connections have to
be made on-site:
-
Controller supply wiring
-
Communication bus wiring
-
User interface connection wiring
-
Digital input (DI) wiring
In certain cases connectors leaving the controller box are
provided for this purpose:
-
Supply air sensor
-
Return air sensor
-
Fresh air damper
EN-6
190
4.3.1 - Ceiling cassette connection
Access to the connections of the controller integrated in
the cassette is via the return air grille of the cassette. Then
lift the sheet metal cover, fixed with screws (item 1).
Access to the integrated controller
Connections
Make the electrical connections to the connectors in
accordance with the wiring diagram and lock the wires
using special cable conduits.
Power cable
•
IMPORTANT: Make the earth connection before
making any other connections.
•
Ensure that the stripped section of the yellow/green
cable is longer than the others.
•
The power connection cables must be type H05 VV
Favec with PVC insulation in accordance with standard
EN 60335-2-40.
•
The power wiring cable must have a minimum cable
section of 2.5 mm².
•
Make sure that the sector supply is via a disconnect
switch that can cut the current to all poles.
•
If the indoor unit includes electric heating, the power
supply is separate. Make sure that the supply cable is
correctly sized.
EN-6
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