Heating circuit control
68
Parameters in Average sub-menu (adjusted outside temperature)
Fluctuations in outside temperatures can sometimes be undesirable when calculating the flow
temperature or when those temperatures form the basis of heating circuit pump shutdown.
Therefore, a separate calculation of the adjusted outside temperature is available for heating curve
calculation and for pump shutdown.
For flow control
Aver. time
Average OT for control
Adjustment for calculating the set flow temperature
Entry for the averaging time
Result of the calculation
For shutdown
Aver. time
Average OT for shutdown
Adjustment for the pump shutdown conditions
Entry for the averaging time
Result of the calculation
Parameters in Shutdown conditions sub-menu (including mixer action)
The controller allows the following shutdown conditions for the heating circuit pump:
if standard mode and
T.room
Act. > set
Diff. on
Diff. off
Shutdown when the room temperature required in standard mode
has been reached.
Start differential for Eff. T.room
Stop differential for Eff. T.room
if setback mode and
T.room
Act. > set
Diff. on
Diff. off
Shutdown when the room temperature required in setback mode has
been reached.
Start differential for Eff. T.room
Stop differential for Eff. T.room
if T.flow
Set < min.
Diff. on
Diff. off
Shutdown when the calculated flow temperature falls below the
T.flow min. threshold in heating or setback mode.
Start differential for T.flow min.
Stop differential for T.flow min.
if T.flow
Act. > max.
Diff. on
Diff. off
Shutdown when the flow temperature is higher than T.flow max.
(setting in the heat curve).
Start differential for T.flow max.
Stop differential for T.flow max.
if T.outside
Aver.off > max.
T.outside max.
Diff. on
Diff. off
Shutdown if the average outside temperature T.outside AVo exceeds
the adjustable value T.outside max. in heating or setback mode.
Required threshold value
Start differential for T.outside max.
Stop differential for T.outside max.
if setback mode and
T.outside
Aver.off > max.
T.outside max.
Diff. on
Diff. off
Shutdown if the average outside temperature T.outside AVo exceeds
the adjustable value T.outside max. in setback mode.
Required threshold value
Start differential for T.outside max.
Stop differential for T.outside max.
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