Viessmann Vitocal 300-G Pro BW 302.D090, Installation And Service Instructions For Contractors

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33
Wiring chamber, front
Fig. 29
Note
Diagram without terminal covers (see also page 70)
M ■
ON/OFF switch (all types)
■
Power supply for compressor power circuit
3 x 400 V/50 Hz (only type BW 302.D090,
BW 302.D110 and BW 302.D140; see also
pos.
A
in Fig. 28)
N
MCB/fuse, power circuit, compressor 2 (only type
BW 302.D090, BW 302.D110, BW 302.D140,
BW 302.D180 and BW 302.D230)
P
MCB/fuse, power circuit, compressor 1
R
Soft starter, compressor 2 (only type
BW 302.D090, BW 302.D110, BW 302.D140,
BW 302.D180 and BW 302.D230)
S
MCB/fuse, power circuit, system components (con-
sumers at terminal strip
C
, see fig. 28)
T
MCB/fuse, control circuit (see separate "Connec-
tion and wiring diagram")
U
Soft starter, compressor 1
Terminal strip for system components
■
Primary pump(s):
On-site connection, see separate "Connection and
wiring diagram".
Factory wiring on main and expansion PCB (termi-
nals 211.1, 224.2), see separate "Connection and
wiring diagram".
■
Secondary pump(s):
On-site connection, see separate "Connection and
wiring diagram".
Factory wiring on main and expansion PCB (termi-
nals 211.2, 224.3), see separate "Connection and
wiring diagram".
Main PCB with expansion PCB
Information regarding the connection values
■
The specified output is the recommended connected
load.
■
The total output of all components connected directly
to the heat pump control unit (e.g. pumps, valves,
message facilities, contactors) must not exceed
1000 W.
If the total output is < 1000 W, the individual rating of
a component (e.g. pump, valve, message facility,
contactor) can be greater than specified. However,
the breaking capacity of the corresponding relay
must not be exceeded.
■
The stated current indicates the max. switching cur-
rent of the switching contact (observe the total cur-
rent of 5 A).
■
Controls for external heat source and central fault
messages are unsuitable for safety LV.
Installation sequence
Electrical connections
(cont.)
5838144
Installation