Viessmann VITODENS 050-W Installation And Service Instructions Manual page 69

Repairs
(cont.)
Replacing the flow sensor
C
E
6. Select a new flow limiter C from
the table below.
Serial no.
(type plate)
7202938
7202939
7. Insert new flow limiter C.
8. Mount flow sensor B with new
gaskets.
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. Remove spring clip D. Remove
faulty flow sensor A.
06. Select new flow limiter E from the
B
table on page 69.
07. Insert new flow limiter E.
08. Fit new flow sensor A with new
gaskets in casing C. Insert spring
clip D.
Troubleshooting
Flow Colour
rate
l/min
12 Light
blue
14 Light
pink
69