5 Electrical installation
i
The electrical connection must be done by an
accredited specialist company, which will be
responsible for complying with the existing
standards and guidelines.
We specifically draw your attention to VDE
Regulation 0100 and the regulations of the
relevant EVU.
e
Danger!
Danger to life from live connections!
When working in the control cabinet of the
boiler there is a danger to life from electric
shock.
The mains switch does not disconnect the
power supply completely.
Mains connection terminals L and N remain
live even if the boiler main switch is turned
off!
Switch the power supply off before wor-
king on the unit.
Secure the power supply against being
switched on again.
b
Caution!
Material damage caused by short circuits!
A maximum of 30 mm of the insulation may
be removed from the ends of cables carrying
mains voltage (230 V) when fitting the ProE
plug. If more insulation is removed there will
be a risk of short circuits on the circuit board
if the cables are inadvertently connected
improperly to the plug.
Remove a maximum of 30 mm of insula-
tion to fit the ProE plug.
Take care to wire up correctly.
i
The nominal voltage of the mains must be
230 V. If the mains voltage is more than 253
V or less than 190 V, functional impairment is
possible.
The unit must be connected to a permanent
supply line and an isolating device with at
least 3 mm contact separation
(e.g. fuses, power switches).
Observe the corresponding regulations.
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5.1 Connecting
a
boiler without eBUS
b
Caution!
Malfunction caused by incorrect wiring!
If more than two boilers without eBUS are to
be connected, all the boilers must be con-
nected via the VR 30 bus coupler.
Terminals 7/8/9 are not activated.
Connect all the boilers via a VR 30 bus
coupler.
Open the control box of the boiler as described in the
installation instructions.
Fig. 5.1 Connecting the boiler
Carry out the wiring of the boiler with the connecting
cable (min. 3x 0.75 mm
2
) (
¬ Fig. 5.1
).
Connect the mains feed from the boiler to the wall
mount with a mains cable.
i
The VRC 630 has a mains switch which can
be used to switch off the internal electronics
and all connected actuators (pumps, mixers)
for testing or maintenance purposes.
If the maximum total current of 6.3 A or the maximum
contact load of 2 A is exceeded within the system, the
consumer(s) must be wired via a contactor.
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27
Installation Instructions VRC 630 0020095108_00
Electrical installation 5
Содержание VRC 630
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