Viessmann Vitotronic 300 KW3 Installation Instructions Manual page 21

Fixed High Limit
Adjustment to 100 ºC (JUMO)
The fixed high limit is factory preset to 230 ºF / 110 ºC.
4.
3.
CAUTION
If adjusted to 212 ºF / 100 ºC do not
set the adjustable high limit above
167 ºF / 75 ºC.
(contd.)
5.
2.
1.
6.
Adjustments
21