Viessmann VITODENS 050-W Installation And Service Instructions Manual page 63

Repairs
(cont.)
Replacing the flow sensor
C
E
01. Drain the boiler on the DHW side.
D
02. Disconnect the leads from faulty
A
flow sensor A.
03. Pull off spring clip B.
04. Remove casing C with flow sen-
sor A.
05. Pull off spring clip D and remove
faulty flow sensor A.
06. Select new flow limiter E from the
B
table on page 62.
07. Insert new flow limiter E.
08. Fit new flow sensor A with new
gaskets in casing C. Insert spring
clip D.
09. Insert spring clip B.
10. Attach leads.
Troubleshooting
63