Viessmann Vitocal 222-S Installation And Service Instructions For Contractors page 38

Installation sequence
Electrical connection
Indoor unit: Overview of connections
A
B
C
D
E
F
G
Fig. 36
Power supply 230 V~: See page 50.
A
F1 Fuse 6.3 A (slow)
Luster terminals: See page 43.
B
X1 Terminals for earth conductors of all associ-
ated system components
X2 Terminals for neutral conductors of all associ-
ated system components
Expansion PCB on main PCB: See page 41.
C
38
(cont.)
G
211
212
224
225
241
X18
J1
F16F14
F11
F13 F12
F4
145 F0
X24
Main PCB: See page 39.
D
F3 Fuse 6.3 A (slow)
If available:
E
Control module and power supply for instantane-
ous heating water heater: See page 52 onwards.
Controller and sensor PCB: See page 44.
F
Connection for bus cable to outdoor unit (Modbus)
G
216
214
X31
193A