Viessmann Vitodens 050-W Installation And Service Instructions Manual page 51

Repairs
(cont.)
Checking or replacing the plate heat exchanger
A
C Heating water return
D Heating water flow
1. Shut off and drain the boiler on the
heating water and the DHW side.
C
F
E DHW
F Cold water
2. Undo screw A on the plate heat
exchanger and remove plate heat
exchanger B with gaskets.
Note
During and after removal, small
amounts of water may trickle from the
plate heat exchanger.
Troubleshooting
D
E
B
51