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

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Troubleshooting
Repairs
(cont.)
Checking or replacing the plate heat exchanger
D
E Heating water flow
F Heating water return
1. Shut off and drain the boiler on the
heating water and the DHW side.
2. Pivot the control unit downwards.
3. Push servomotor A slightly
upwards.
4. Turn adaptor B with servomotor A
1/8 of a turn anticlockwise and
remove.
46
D
E
H
C
G Cold water
H DHW
5. Remove two screws C from the
plate heat exchanger and remove
plate heat exchanger D with gas-
kets.
Note
During disassembly and once
removed, small amounts of water
may escape from the plate heat
exchanger.
F
G
A
B

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