Manual Mode" / "Emission Measurement" Button - Honeywell SDC heating and district heating controller Service Manual

Operation
5.1.2.8
5.1.2.8.1
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Application
NOTE
Cancellation
44

"Manual mode" / "Emission measurement" button

Manual mode
If this button is pressed and held longer than 5 s in the basic
display, the controller is switched to manual mode. In this
operating mode, the required heat generator temperature is
specified manually with the input button
respective heating need.
A controller set to manual mode has no effect in heat circuit
expansion.
The heat generator setpoint is set between the minimum and
maximum heat generator temperatures and appears flashing at
C
the bottom left-hand side. The current heat generator temperature
appears statically on the right-hand side in the basic display. The
set switching differential corresponds to the value of automatic
control and is symmetrical to the set value.
Controller malfunctions (emergency operation), errors
The maximum heat generator temperature limit is paramount to
the heat generator switching differential and stops the heat
generator in case of exceedance.
With control devices operated purely as a heating circuit
expansion, the setting of the temperature has no effect.
The last value to which the control device adjusted the heat
generator temperature appears as a recommendation.
Press button or
operating mode.
î
according to the
button, to return to the last selected
SDC / DHC
EN2H-0221GE51 R0808