Options Expansion Pcb - Viessmann Vitotronic SPS Service Instructions Manual

Expansion PCB
X20 X21
X30
X29 X28
Fig. 39
Note
The following terminal assignments relate only to the
Vitocal 300-G/W Pro SPS, Vitocal 350-G Pro and
Vitocal 350-G Pro up to 1.1 MW (screw systems).
Terminal assignments
Connection Terminal
Digital OUT X20
Digital OUT X21
X22 X23
X27 X26 X25 X24
Address Pos. no.
1 DI 0 3
3 DI 1 1
5 DI 2 2
7 DI 3 2
1 DI 4 2
3 DI 5 403
5 DI 6 404
7 DI 7
PCBs and connection options
Type A = Vitocal 300-G/W Pro SPS
Type B = Vitocal 350-G Pro
Type C = Vitocal 350-G Pro up to 1.1 MW (screw sys-
tems)
Type Explanation
A B C
X X Diverter valve, DHW cylinder heating
X Oil line, compressor 1
X X Start command, night heating, DHW
cylinder
X Compressor 1 capacity 25 %
X X Start command, external heat gener-
ator
X Compressor 1 capacity 50 %
X X Diverter valve, residual heat/heating
X Compressor 1 capacity 75 %
X X Start command, re-cooler
X Oil line, compressor 2
X X Shut-off valve, dry cooler
X Compressor 2 capacity 25 %
X X Shut-off valve, residual heat
x Compressor 2 capacity 50 %
X X Diverter valve 1, coolant
X Compressor 2 capacity 75 %
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