Checking the plate-type heat exchanger
Drain the boiler on its heating water
and DHW side.
During removal, small amounts of
water may trickle out and escape from
the removed plate-type heat exchan-
ger.
1.
Shut off and drain the boiler on its
heating water and DHW side.
2.
Release the side closures and
pivot the control unit forward.
3.
Remove the siphon.
4.
Release compression fittings
A
,
screws
B
and pull out plate-type
heat exchanger
C
.
5.
Check the connections on the heat-
ing water and DHW side for con-
tamination and scaling; if required,
replace the plate-type heat exchan-
ger.
6.
Lubricate the new gaskets/seals.
Install in reverse order with new
gaskets.
Checking the temperature limiter
Check the temperature limiter, if the burner control unit cannot be reset after a
fault shutdown, although the boiler water temperature is below approx. 75 °C.
Repairs
(cont.)
86
Troubleshooting
5692
731
GB
Содержание VITODENS 333-F WS3A
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