Viessmann B2HF, Installation And Service Instructions For Contractors

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29
Power supply
fÖ
Danger
Incorrectly executed electrical installations can
result in injuries from electrical current and dam-
age to the appliance.
Connect the power supply and implement all
safety measures (e.g. RCD circuit) in accord-
ance with the following regulations:
■ IEC 60364-4-41
■ VDE regulations
■ Connection conditions of the local grid opera-
tor
■ Install an isolator in the power cable to provide
omnipolar separation from the mains for all active
conductors, corresponding to overvoltage cate-
gory III (3 mm) for complete isolation. The isolator
must be fitted in the permanent electrical installation,
in line with installation requirements.
In addition we recommend the installation of an
AC/DC-sensitive RCD (FI Class A
).
■ Connect the power cable to the electricity supply
using a fixed connection.
■ If the power supply to the appliance is connected
with a flexible cable, ensure that the live conductors
are pulled taut before the earth conductor in the
event of strain relief failure. The length of the earth
conductor wire will depend on the design.
■ Max. fuse rating 16 A.
Danger
The absence of system component earthing can
lead to serious injury from electric current if an
electrical fault occurs.
The appliance and pipework must be connected
to the equipotential bonding of the building.
Installation sequence
Electrical connections
(cont.)
5593201
Installation