Measures In Event Of Boiler Overheating; Boiler Water Temperature Has Reached 100 °C - Viessmann VITOLIGNO 300-C Operating Instructions Manual

Boiler operation

Measures in event of boiler overheating

The high limit safety cut-out protects your boiler from
overheating.
Note
Never make adjustments at the high limit safety cut-
out, which would result in an exclusion of liability.
Replace faulty components only with genuine spare
parts from Viessmann.
Boiler water temperature has reached 100 °C
High limit safety cut-out
The reset button of the high limit safety cut-out is loca-
ted behind cover of the programming unit.
A
Note
Any high limit safety cut-out response requires a man-
ual reset.
Triggering the function:
The high limit safety cut-out will respond if the boiler
water temperature exceeds 100 °C.
Cancelling the function:
Note
The high limit safety cut-out can only be reset
(unlocked) once the boiler water temperature has
reached approx. 70 °C.
A
Fig. 5
1. Slide cover on the programming unit to the
A
right.
2. Press the green button on the high limit safety cut-
out. A quiet "click" will be audible. The high limit
safety cut-out has been reset.
3. Close the programming unit cover.
4. Acknowledge the excess temperature on the pro-
gramming unit of the control unit with
12
Note
Notify your heating contractor if the boiler overheats
again after a short time or overheats regularly.
.
d