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Installation Instructions VRC 430 0020042468_028
h
Note!
The bridge between the terminals 3 and 4
(see Fig. 5.1) should not be removed.
When connecting the eBUS cable there is no
need to make sure the polarity is correct. Com-
munication is not adversely impacted if the two
connections are swapped over.
Proceed as follows:
Connect the eBUS cable to the VRC 430 terminal
rail.
Connect the eBUS cable to the terminal rail on the
heating unit.
5.2 Electrical installation of the external sensor
VRC 693
The power supply to the heating unit is switched off and
secured against re-connection.
1
2
Fig. 5.2 Electrical connection of VRC 693
Key
1 Connection cable to the external sensor VRC 693
2 6-pole edge connector for plug location X41 (heating unit)
Proceed as follows:
Connect the connection cable to the terminals on
the external sensor as per Fig. 4.2.
Connect the connection cable to the 6-pole edge
connector as per Fig. 5.2.
Connect the 6-pole edge connector to plug location
X41 on the heating unit.
5.3 Electrical installation of the external sensor
VRC 9535
The power supply to the heating unit is switched off and
secured against re-connection.
1
2
Fig. 5.3 Electrical connection of the external sensor VRC 9535
Key
1 Terminal rail VRC 9535 external sensor
2 6-pole edge connector for plug location X41 (heating unit)
Proceed as follows:
Connect the connection cable to the terminal rail of
the external sensor as per Fig. 5.3.
Connect the connection cable to the 6-pole edge
connector as per Fig. 5.3.
Connect the 6-pole edge connector to plug location
X41 on the heating unit.
5 Installation
28


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