127
Triggering the function
If the boiler water temperature exceeds
95 °C
, the high
limit safety cut-out responds.
Note
The high limit safety cut-out can only be reset man-
ually.
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.
Whenever the high limit safety cut-out has been
triggered, check afterwards that the thermally
activated safety valve is reset.
A
B
Fig. 69
1.
Move cover
A
on the programming unit to the
right.
2.
Press green button
B
of the high limit safety cut-
out.
A faint "click" will be audible; the high limit safety
cut-out is reset.
3.
Close cover
A
on the programming unit.
4.
Acknowledge excess temperature at the program-
ming unit with
d
.
Sensors
Sensor type Pt1000:
■
Flow temperature sensor
■
Buffer temperature sensor
■
Return temperature sensor
■
Flue gas temperature sensor
■
Outside temperature sensor
Curve of the sensor from the extension kit for heating
circuit with mixer:
Extension kit installation instructions
Connection
See chapter "Connection and wiring diagram" from
page 142.
Maintenance
High limit safety cut-out
(cont.)
5679249
Maintenance
