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6.8 Electrical connection
6.8.1 General
The ventilation unit must be connected to a 230V/50Hz power
supply. All plug connections are on the rear of the ventilation
unit.
CAUTION!
All electrical connection work must be performed only by a
qualified electrician in compliance with the safety regulations
for electrical equipment, the applicable standards and the ex-
isting local regulations.
The power supply disconnect device must be freely accessi-
ble at all times. Work on the unit must always be performed
with the power disconnected.
6.8.2 Connection cable
The unit is supplied with a pre-assembled mains power connec-
tion. This is plugged into the rear of the unit (X210).
X240
Digital inputs
X250
Digital outputs
X200
RS 485
X210
Power
Fig. 6.16:Rear unit connection plate
Connector
X 200
Modbus RS 485
X 210
Power supply 230V/50Hz
X 220
External display (CAN bus, SELV)
X 230
Not used
X 240 / X 241 Digital inputs (optional equipment)
X 250 / X 251 Digital outputs (optional equipment)
18
X241
X251
X220
Ext. display
X230
Hyd. heating register
Connection
DOK4SVxxDEN · FD 9912
Domestic ventilation unit M Flex Air (Plus)
HINWEIS
NOTE
An all-pole mains disconnect device with a contact clearance
of at least 3mm is required on the installation side.
CAUTION!
Electrical cables must be installed in such a way that there are
no mechanical loads acting on the cable connections in the
unit and electrical cables cannot come loose from their con-
necting sockets. Cables must not be damaged by the casing
covers or maintenance covers.
6.8.3 Electronic boards in the ventilation unit
The ventilation unit is equipped with an electronics box, which
contains the boards.
1
2
Fig. 6.17:Electronics box
Electronics box
1
2
Power supply board
Control / CPU board
3
Slot for Enocean/digital input and output
4
board (optional)
4
3
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