Internal Unit: Overview Of Connections - Viessmann VITOCAL 222-S Installation And Service Instructions Manual

Electrical connection

Internal unit: Overview of connections

A
sYA sYS
F
Fig. 26
Expansion PCB on main PCB: Make no on-site
A
connections.
Main PCB: See page 34.
B
F3 Fuse 6.3 A (slow)
Controller and sensor PCB: See page 37.
C
AVI PCB: See page 39.
D
F101 Fuse 1.0 A (slow)
E Luster terminals: See page 36.
F1 Fuse 6.3 A (slow)
X1 Terminals for earth conductors of all associ-
ated system components
X2 Terminals for neutral conductors of all associ-
ated system components
(cont.)
B
sVA
X18
F3
X3 X2
N
1
1
3
4
6
7
8
9 1
E
18
F1
X31
C
X25
F20 F12 F4 F0
J3
F21 F13 F27
J4 X24
F23 F14 F8
F7
F26 F16 F11 F6
aVG
X15
X1
D
12 V
P202
COM
COM
P203
43 V
F101
1
Switching module and power supply for instanta-
F
neous heating water heater: See page 43.
Installation sequence
33