Viessmann Vitocal 350-A Installation And Service Instructions Manual page 76

Installation sequence
Electrical connections in the heat pump control...
Overview of the PCBs
X7 X5
X3
A PCB 1 (cross connect PCB)
B Fuse F1 for the heat pump control
unit on PCB 1
C PCB 2 (main PCB)
76
A
B
C
X10
X2
X1
X7
X9
X16
X15
X11
X8
D Slot for coding card on PCB 2
E PCB 3 (sensor PCB)
F Slot for LON communication module
on PCB 3 (sensor PCB)
(cont.)
D
E
F
X5
X6
X2
X1