CTC Union EcoPart 425-435, Installation And Maintenance Manual

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28 CTC EcoPart i425-i435 Pro
General Information
ON
1 2
ON
1 2
ON
1 2
ON
1 2
ON
1 2
ON
1 2
ON
1 2
ON
1 2
5.3 Series connection of heat pumps
When more than one product (two cooling modules) is connected, the
subsequent cooling modules must be addressed correctly. The CTC Basic
Display on these products can be used to name these products as shown
below; see the manual for the CTC Basic Display.
CTC EcoLogic Pro CTC EcoPart i425-i435 CTC EcoPart i425-i435 Pro
CTC Basic Display
OK
OK
A2
A1
A2
A1
A2
A1
A4
A3
A6
A5
A8
A7
A10
A9
The last heat pump (the cooling module) connected in series must be partly
terminated and the shielding in the communication cable must be connected
to earth. See below.
5.3.1 Terminated position
The last heat pump connected in series must be terminated. This is achieved
with a DIP switch located on the circuit board inside the electrical cabinet.
The top cooling module A2 is terminated at the factory, i.e. DIP switch 2 is in
the ON position. In the bottom cooling module A1, DIP switch 2 is in the OFF
position. Make sure DIP switch 2 is in the ON position on the module that is
to be terminated.
Factory setting of termination
A2
A1
ON
1 2
ON
1 2
DIP switch 1 is used to set whether a CTC Basic Display is connected. This
is why it is set to OFF on the Pro version and ON on the standard version of
the heat pump.