Viessmann Vitoligno 250-S Installation And Service Instructions For Contractors page 17

Electrical connections
Plug a;S : Valve of return temperature raising facility
Fig. 8 Max. 0.5 A
Plug sL : Boiler circuit pump
Fig. 9 Max. 2 A
Plug : Oil/gas burner enable
aML
A
Fig. 10 Max. 2 A
Plug : Additional boiler enable
aML
A
L1
Fig. 11 Max. 2 A
Boiler enable
A
(cont.)
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29
179
179
Installation sequence
17