Viessmann VITODENS 050-W Installation And Service Instructions Manual page 70

Troubleshooting
Repairs
(cont.)
Checking or replacing the plate heat exchanger
C Heating water return
D Heating water flow
E DHW
1. Shut off and drain the boiler on the
heating water and DHW sides.
70
09. Insert spring clip B.
10. Attach leads.
C
F
A
F Cold water
2. Undo screw A on plate heat
exchanger. Remove plate heat
exchanger B with gaskets.
D
E
B