Viessmann Vitocal 200-G Series Installation And Service Instructions Manual page 30

Installation sequence
Electrical connection
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
Plug
sYH
Terminals Function
216.1
External hook-up, heating/cooling cir-
A1
cuits:
Central heating demand, heating cir-
cuit A1/HC1
Or
Smart Grid:
Floating contact 1
216.2 External hook-up, heating/cooling cir-
cuits:
Room cooling demand, heating circuit
A1
A1/HC1
216.4 Smart Grid:
Floating contact 2
30
(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
■
Explanation
230 V~ digital input:
230 V~: Central heating demand for heating circuit
■
A1/HC1 active
0 V: No demand
■
Breaking capacity 230 V, 2 mA
■
230 V~ digital input:
230 V~: Contact active
■
0 V: Contact not active
■
Breaking capacity 230 V, 2 mA
■
230 V~ digital input:
230 V~: Room cooling demand for heating circuit
■
A1/HC1 active
0 V: No demand
■
Breaking capacity 230 V, 0.15 A
■
230 V~ digital input:
230 V~: Contact active
■
0 V: Contact not active
■
Breaking capacity 230 V, 2 mA
■