Viessmann Vitodens 200-W Series Installation Instructions Manual page 44

Control Connections
Electrical Connections
Power/Pump module electrical connectors
120/230
Transformer
Fig. 37
Legend
- Power supply
40
- System pump
20A
sA
- DHW pump
sÖ
- Boiler pump
sK - DHW recirculation pump
- Fault alarm output
50
- External blocking terminals 2-3
143
External demand terminals 1-2
External heating program
changeover terminals 1-2
The allocation of the function
"external heating program
changeover" is set via coding
address '91'
144 - External 0-10V signal
145 - KM BUS to boiler control board
See Vitodens 200-W WB2B
Start-up/Service Instructions
for applicable system coding
information.
44
(continued)
Power/Pump module
L
L
N
40 20A
40 20A
L2 L1G N
N L N L N L
21 20 50
21 20
50
1 2 3 1 2 3
143
144
N
144
143
1 2 3 1 2 3
28
L G N
1 2 3
145
145
1 2 3