Viessmann Vitocal 222-S Installation And Service Instructions For Contractors page 41

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-
cuits:
Central heating demand, heating cir-
cuit A1/HC1
A1
216.2 External hook-up, heating/cooling cir-
cuits:
Central cooling demand, heating cir-
cuit A1/HC1
A1
Indoor unit: Expansion PCB on main PCB (230 V~ components)
Information regarding the connection values
■ The specified output is the recommended connected
load.
■ Total output of all components connected directly to
the heat pump control unit (e.g. pumps, valves, mes-
sage facilities, contactors): Max. 1000 W
If the total output is < 1000 W, the individual rating of
a component (e.g. pump, valve, message facility,
contactor) can be greater than specified. However,
the breaking capacity of the relevant relay must not
be exceeded.
The specified current indicates the max. switching
■
current of the switching contact. Observe total cur-
rent of 5 A.
(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~: Central cooling demand for heating circuit
■
A1/HC1 active
0 V: No demand
■
Breaking capacity 230 V, 0.15 A
■
Set the required parameters during commissioning:
See page 73 onwards.
Installation sequence
41