Electrical Connection - Viessmann Vitosol 222-T Installation And Service Instructions For Contractors

Electrical connection

If the power cable needs to be extended:
■ For the electrical installation, observe
the regulations regarding electrical
specifications.
■ For the power cables, use waterproof,
temperature-resistant, well insulated
and hard-wearing cables:
– Cable resistance ≥ 2 MΩ
– Cable cross-section for a connection
length of 2 m: 1 mm
Cable cross-section for a connection
length ≥ 2 m: 1.5 mm
■ Protect exposed parts with insulating
sheaths to prevent short circuits and
premature ageing of the power cable.
■ Install terminal TB-1503: connect the
cables in accordance with the following
diagram.
N N
A
L1
?
L
N
A Plug with integral residual current
device
B PCB in the DHW cylinder
C Connection, electric immersion
heater
D Temperature sensor connection
■ When closing the plug, ensure that the
cover only touches the power cable
insulation.
2
2
B C
L2
L
E D
Installation sequence
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