Overview Of Electrical Connections - Viessmann Vitocal 300-G Pro SPS Installation And Service Instructions For Contractors

Overview of electrical connections

Note
■ Route 230 V~ cables and LV leads separately and
bundle them tightly together at the terminals. This
ensures that, in the event of a fault, e.g. when
detaching a wire, the wires cannot drift into the adja-
cent voltage area.
Strip the cables of a small amount of insulation close
■
to the terminals.
■ If 2 components are connected to the same terminal,
press both cores together in a single wire ferrule.
Wiring chamber, front
B
A
Fig.23
Power supply connection side
A
Mains isolator
B
Only type BW 302.BS090, BW 302.BS120,
N
BW 302.BS150, BW 302.BS180, BW 302.BS250,
WW 302.BS125, WW 302.BS155,
WW 302.BS200, WW 302.BS250,
WW 302.BS300:
MCB/fuse, power circuit, compressor 2
Only type BW 302.BS090, BW 302.BS120,
O
BW 302.BS150, BW 302.BS180, BW 302.BS250,
WW 302.BS125, WW 302.BS155,
WW 302.BS200, WW 302.BS250,
WW 302.BS300:
Contactor, compressor 2
O
P
N
S
T
R
Only type BW 302.BS090, BW 302.BS120,
P
BW 302.BS150, BW 302.BS180, BW 302.BS250,
WW 302.BS125, WW 302.BS155,
WW 302.BS200, WW 302.BS250,
WW 302.BS300:
Soft starter, compressor 2
Power supply unit 230 VAC, 24 VDC
Q
MCB/fuse, power circuit, compressor 1
R
Contactor, compressor 1
S
Soft starter, compressor 1
T
Installation sequence
Q
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