Viessmann Vitodens 100-W Installation And Service Instructions Manual page 46

Troubleshooting
Repairs
(cont.)
Serial number
(Type plate)
7373 061
7373 063
7373 065
Checking or replacing the plate-type heat exchanger (gas fired
condensing combi boiler)
D
E Heating water flow
F Heating water return
1. Shut off and drain the boiler on the
heating water and the DHW side.
46
Flow rate
l/min
D
E
H
C
G Cold water
H DHW
2. Flip down control unit.
Colour
10 black
12 red
14 brown
F
G
A
B