Viessmann Vitovalor 300-P Installation And Service Instructions For Contractors page 40

Installation sequence
Electrical connections
1x
< 42 V
Fig. 38
1. Connect the power cable for the entire system to
plug on the distribution board.
fÖ
2. Pass the power cable out of the gas condensing
module towards the rear.
3. Tie the 230 V cables and LV leads separately to
the underside of the air box.
4. Tie the connecting cables from accessories to the
underside of the air box.
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 requirements specified by your
■
local power supply utility
40
(cont.)
2x
230 V~
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■ Install an isolator in the power line to provide omnip-
olar separation from the mains for all active conduc-
tors, corresponding to overvoltage category 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 B
(fault) currents that can arise from energy efficient
equipment.
Danger
The absence of component earthing for the sys-
tem can lead to serious injury from electric cur-
rent if an electrical fault occurs.
Connect the appliance and pipework to the equi-
potential bonding of the building.
) for DC