38
Wiring chamber, front
N
O
P
R
S
T
A
B
Fig.32
A
Power supply, power circuit (compressor)
3 x 400 V/50 Hz
B
Mains isolator
N
Only type BW 302.B090, BW 302.B120,
BW 302.B150, BW 302.B180, BW 302.B250,
WW 302.B125, WW 302.B155, WW 302.B200,
WW 302.B250, WW 302.B300:
MCB/fuse, power circuit, compressor 2
O
Only type BW 302.B09, BW 302.B120,
BW 302.B150, BW 302.B180, BW 302.B250,
WW 302.B125, WW 302.B155, WW 302.B200,
WW 302.B250, WW 302.B300:
Contactor, compressor 2
P
Only type BW 302.B090, BW 302.B120,
BW 302.B150, BW 302.B180, BW 302.B250,
WW 302.B125, WW 302.B155, WW 302.B200,
WW 302.B250, WW 302.B300:
Soft starter, compressor 2
R
MCB/fuse, power circuit, compressor 1
S
Contactor, compressor 1
T
Soft starter, compressor 1
Terminal strip for system components
■
Primary pump(s):
On-site connection, see separate "connection and
wiring diagram" sheet 13.
Factory wiring on main and expansion PCB (termi-
nals 211.1, 224.2), see separate "connection and
wiring diagram" sheet 20.
■
Secondary pump(s):
On-site connection, see separate "connection and
wiring diagram" sheet 13.
Factory wiring on main and expansion PCB (termi-
nals 211.2, 224.3), see separate "connection and
wiring diagram" sheet 20.
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
Overview of electrical connections
(cont.)
5549 984 GB
Installation
Содержание KWT BW 301.B090
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