Viessmann D2RA, Installation Instructions For Contractors

Page: 32 / 164

32
Power supply
fÖ
Danger
Incorrectly executed electrical installations can
result in injuries from electrical current and in
appliance damage.
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 requirements specified by your
local power supply utility
■ 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 full isolation. This isolator must be
fitted in the permanent electrical installation, in line
with the installation requirements.
In addition, we recommend installing an AC/DC-sen-
sitive RCD (RCD class B
) for DC (fault) cur-
rents that can occur with energy efficient equipment.
■ Max. fuse rating 16 A.
Danger
The absence of 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.
Connecting Vitocom (accessories) to LON
A
Fig. 22
A
RJ 45 LON coupling for connecting the Vitocom
Note
LON coupling
A
can be mounted below or to the left
or right of the apertures on the sides, depending on
how the connection set is fitted.
Vitocom connection:
"Vitocom" installation instructions
Installation sequence
Electrical connections
(cont.)
5678 044 GB
Installation