Overview Of Electrical Connections - Viessmann VITOCAL 300-G PRO SPS Installation And Service Instructions Manual

Installation sequence

Overview of electrical connections

Note
■ Route 230 V~ cables and LV cables
separately and bundle them tightly
together at the terminals. This ensures
that, should there be a fault, for exam-
ple when detaching a wire, the wires
cannot drift into the adjacent voltage
area.
■ Strip the insulation just ahead of 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
N Only type BW 302.AS090,
BW 302.AS120, BW 302.AS150,
BW 302.AS180, BW 302.AS250,
WW 302.AS125, WW 302.AS155,
WW 302.AS200, WW 302.AS250,
WW 302.AS300:
MCB/fuse, power circuit, compres-
sor 2
O Only type BW 302.AS090,
BW 302.AS120, BW 302.AS150,
BW 302.AS180, BW 302.AS250,
WW 302.AS125, WW 302.AS155,
WW 302.AS200, WW 302.AS250,
WW 302.AS300:
Contactor, compressor 2
40
A Power supply connection side
B Mains isolator
O
P
N
P Only type BW 302.AS090,
R MCB/fuse, power circuit, compres-
S Contactor, compressor 1
T Soft starter, compressor 1
S
R
BW 302.AS120, BW 302.AS150,
BW 302.AS180, BW 302.AS250,
WW 302.AS125, WW 302.AS155,
WW 302.AS200, WW 302.AS250,
WW 302.AS300:
Soft starter, compressor 2
sor 1
T