Vitoligno 300-C Installation/Service
5790 980 - 04
102
Service
High Limit Safety Cut-out
The high limit safety cut-out is part of the boiler. The
high limit safety cut-out is located behind the boiler
programming unit.
Note:
Any high limit safety cut-out response requires
a manual reset.
Triggering the function
The high limit safety cut-out responds if the supply
temperature exceeds 230°F (110°C).
Cancelling the function
Note:
The reset can only take place once the supply
temperature has dropped to approx. 140°F (60°C).
CAUTION
If this function is not reset, it inhibits the safety
equipment function and can result in system damage.
Whenever the high limit safety cut-out has been
triggered, check afterwards that the thermally activated
safety valve is reset.
1. Move cover
A
on the programming unit to the 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 cover
A
on the programming unit.
4. Acknowledge excess temperature at the programming
unit of the control unit with
d
.
