Viessmann Vitocal 300-G Installation And Service Instructions Manual page 31

Electrical connection
Connecting the temperature limiter, part no. 7151728,
7151729 B to the mixer extension kit
A
N
?
sÖ
B
sÖ
M
C
1~
Fig. 25
Connect plug to the extension kit.
A sÖ
Temperature limiter
B
Heating circuit pump M3/HC3
C
Plug
sYF
Terminals Function
214.1 External hook-up, heating/cooling cir-
cuits:
Central heating demand, heating cir-
cuit M2/HC2
M2
214.2 External hook-up, heating/cooling cir-
cuits:
Central cooling demand, heating cir-
cuit M2/HC2
M2
214.3 External hook-up, heating/cooling cir-
cuits:
Central heating demand, heating cir-
cuit M3/HC3
M3
214.4 External hook-up, heating/cooling cir-
cuits:
Central cooling demand, heating cir-
cuit M3/HC3
M3
Note
If heat pump stage 2 is connected, the external hook-
up for heating/cooling circuits is not possible.
(cont.)
Explanation
230 V~ digital input:
230 V~: Central heating demand for heating circuit
■
M2/HC2 active
0 V: No demand
■
Breaking capacity 230 V, 0.15 A
■
230 V~ digital input:
230 V~: Central cooling demand for heating circuit
■
M2/HC2 active
0 V: No demand
■
Breaking capacity 230 V, 0.15 A
■
230 V~ digital input:
230 V~: Central heating demand for heating circuit
■
M3/HC3 active
0 V: No demand
■
Breaking capacity 230 V, 0.15 A
■
230 V~ digital input:
230 V~: Central cooling demand for heating circuit
■
M3/HC3 active
0 V: No demand
■
Breaking capacity 230 V, 0.15 A
■
Installation sequence
31