Viessmann Vitoligno 300-C Installation And Service Instructions Manual page 113

High limit safety cut-out
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.
!
Please note
If this function is not reset, it inhibits the safety
equipment function and can result in system
damage.
Reset the high limit safety cut-out.
Fig. 54
Sensors
Sensor type Pt1000:
■ Flow temperature sensor
■ Buffer temperature sensor
Return temperature sensor
■
Flue gas temperature sensor
■
Outside temperature sensor
■
Connection
See chapter "Connection and wiring diagram" from
page 164.
(cont.)
The ON/OFF switch of control unit
button (green) for high limit safety cut-out
located behind the cover.
1. Move 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 cover A on the programming unit.
4. Acknowledge excess temperature at the program-
ming unit with .
d
Curve of the sensor from the extension kit for heating
circuit with mixer:
Extension kit installation instructions
Maintenance
and the reset
A
is
B
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