Terminal Strip For System Components - Viessmann Vitocal 300-G Pro Series Installation And Service Instructions For Contractors

Electrical connections
Wiring chamber, front
Fig. 29
Note
Diagram without terminal covers (see also page 70)
■ ON/OFF switch (all types)
M
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. in Fig. 28)
A
MCB/fuse, power circuit, compressor 2 (only type
N
BW 302.D090, BW 302.D110, BW 302.D140,
BW 302.D180 and BW 302.D230)
MCB/fuse, power circuit, compressor 1
P

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".
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.
(cont.)
R Soft starter, compressor 2 (only type
BW 302.D090, BW 302.D110, BW 302.D140,
BW 302.D180 and BW 302.D230)
MCB/fuse, power circuit, system components (con-
S
sumers at terminal strip
MCB/fuse, control circuit (see separate "Connec-
T
tion and wiring diagram")
Soft starter, compressor 1
U
■ 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".
Installation sequence
, see fig. 28)
C
33