23
Isolators for non-earthed conductors
■
Install an isolator in the power cable to provide
omnipolar separation from the mains for all active
conductors, corresponding to overvoltage category
III (3 mm) for full isolation. This isolator must be fitted
in the permanent electrical installation in line with
installation requirements, e.g. mains isolator or
upstream circuit breaker.
■
We additionally recommend installing an AC/DC-
sensitive RCD (RCD class B
) for DC (fault)
currents that can occur with energy efficient equip-
ment.
■
Residual current devices to DIN VDE 0100-530
selecting and sizing.
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
■
Technical connection requirements specified
by the local power supply utility
■
Protect the power cable to the heat pump con-
trol unit with an MCB/fuse of max. 16 A.
Danger
The absence of component earthing for the sys-
tem can lead to serious injury from electric cur-
rent if an electrical fault occurs.
The appliance and pipework must be connected
to the equipotential bonding of the building.
Power cable
The DHW heat pump is fully wired with a 3-core power
cable:
■
H05VV-F 3G 1.5
■
Colour: white
■
Cores:
L1: Brown
N:
Blue
PE: Green/yellow
A separately fused
standard socket
is required for the
power supply:
■
230 V/50 Hz
■
Max. fuse rating 10 A
Damaged connecting cables
If connecting cables of the appliance or externally
installed accessories are damaged, replace them with
special connecting cables. Use only Viessmann
cables/lines as replacement.
Installation sequence
Connecting to the power supply
5788 057 GB
Installation
