Viessmann Vitocrossal Installation Instructions Manual page 28

Connecting the control unit
Overview of electrical connections for the mains connection box
1L1 3L2 5L3
2T1 4T2 6T3
M
400V~
100A
100
4
Fig. 21
Mains connection to Vitotronic control unit
fÖ
Fan motor
a-Ö
A PWM switching, fan motor
a-Ö
Mains connection, accessories to Vitotronic
aBH
control unit
Mains connection to main MCB/fuse
A
400 V/50 Hz
28
(cont.)
PE PE PE L1 L1 L2 L3 4
13 A1
14 A2
100A
L1
L2
400 V/50 Hz
L3
A
N
L1
L2 L3
N N N
40 156
N L L N
Base I