24 VRT 230 Installation Manual
10 Electrical installation
The electrical connection may only be
carried out by a suitably qualified engi-
neer.
Danger!
Risk of fatal electric shock from
touching live connections. Before
working on the room thermostat,
turn off the power supply and
secure against restart.
10.1 Connecting the room thermostat
The thermostat is connected to the boil-
er via a 3-core cable. Use a cable with a
cross section of at least 3 x 0.75 mm2,
up to 3 x 1.5 mm2.
• Remove the jumper from terminals 3
and 4 on the boiler (if present).
• Connect the three-core cable to termi-
nals 3-4-5 in the wall mounting box of
the room thermostat and the electron-
ic box of the boiler.
• Make sure you do not mix up cores 3-
4-5.
10 Electrical installation
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