Viessmann Vitoligno 300-C Installation And Service Instructions Manual page 39

18 to 48 kw pellet boiler
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Electrical connections
Connection options at HKK PCB and extension kits via KM-BUS
Key
HC
Heating circuit
SOL Solar circuit
TWE DHW heating
(UP) Additional function solar optional: Circulation pump for heat transfer of the DHW cylinder
(ZP) DHW circulation pump optional
Without solar
To HKK PCB of the control unit
Connection group
A1
1 heating circuit
HC1
with mixer
2 heating circuits
HC1
with mixer
HC1
3 heating circuits
HC1
with mixer
HC1
HC1
4 heating circuits
HC1
with mixer
HC1
HC1
1 heating circuit
HC1
with mixer
HC1
and TWE
2 heating circuits
HC1
with mixer
HC1
and TWE
HC1
HC1
3 heating circuits
HC1
with mixer
HC1
and TWE
HC1
HC1
HC1
4 heating circuits
HC1
with mixer
HC1
and TWE
HC1
(cont.)
A2
(ZP)
(ZP)
HC2
(ZP)
(ZP)
HC2
(ZP)
HC2
(ZP)
HC2
(ZP)
HC2
TWE + (ZP)
(ZP)
TWE + (ZP)
(ZP)
HC2
HC2
(ZP)
(ZP)
TWE + (ZP)
TWE + (ZP)
HC2
HC2
(ZP)
HC2
TWE + (ZP)
TWE + (ZP)
HC2
TWE + (ZP)
HC2
To "Extension kit for heating
circuit with mixer" (if instal-
led) via KM-BUS
E1
Rotary selector S1 setting
A3
1
HC1
(ZP)
HC1
HC2
HC3
HC1
(ZP)
HC3
HC2
HC3
HC4
HC2
(ZP)
HC3
TWE
HC1
HC1
TWE + (ZP)
(ZP)
TWE
HC2
HC1
HC2
HC1
HC3
TWE
(ZP)
HC3
HC2
TWE + (ZP)
HC3
HC2
HC1
HC3
HC4
HC2
TWE + (ZP)
HC3
Installation sequence
E2
E3
3
5
HC2
HC2
HC3
HC3
HC3
HC4
HC4
TWE
TWE
HC2
TWE
HC2
TWE
HC3
TWE
HC3
HC2
HC3
TWE
HC3
HC4
HC4
39

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