Potterton eurocondense four 125 kw Installation, Operation And Maintanance Manual page 92

9 Settings
92
Floor curing setp current (855, 1155, 1455)
Display of the current floor curing setpoint.
Days complete.current (856, 1156, 1456)
Display of the current floor curing function day.
Excess heat draw (861, 1161, 1461)
If the excess temperature draw is activated via input H1 to H5 or a maxi­
mum temperature is exceeded in the system, this excess heat energy can
be dissipated by the central heating drawing off heat.
Off: The function is switched off.
Heating mode: The function is only limited to one draw-off during the
heating times.
Always: The function is generally released.
With buffer (870, 1170, 1470)
This parameter establishes whether the heating circuit can be supplied by
a buffer or storage tank or only by a heat generator. The function also de­
termines whether the system pump goes into operation when a heat de­
mand is submitted.
No: The heating circuit is supplied from the boiler.
Yes: The heating circuit can be supplied from the buffer storage tank.
With prim contr/system pump (872, 1172, 1472, 5092)
This parameter establishes whether a zone system pump goes into opera­
tion with a heat demand of the heating circuit. This system pump is based
on the segment in which this controller is located (LPB bus system) and
which is controlled with a primary control.
No: The heating circuit is supplied without primary controller/system
pump.
Yes: The heating circuit is supplied from the primary controller by the
system pump.
Pump speed reduction (880, 1180, 1480)
Speed reduction of the heating circuit pump can be done acc. to operating
level or acc. to pump characteristic curve.
Operating level: With this option the speed of the heating circuit pump is
calculated acc. to the operating level. The pump is controlled in operat­
ing level comfort (incl. optimization) or during active floor curing function
with parameterized maximum speed. With reduced operating level the
pump is controlled with the parameterized minimum speed.
Characteristic The pump speed of the heating circuit pump is calculated
based on the flow temperature actually received and the current flow
setpoint. The common flow temp setpoint is used for the actual value. If
no common flow temperature sensor is available the boiler flow actual
value is used. The temperature actual value is attenuated with a filter
(time constant for which parameters can be set).
Pump speed min (882, 1182, 1482)
The minimum speed for the heating circuit pump can be specified using
this function.
Pump speed max (883, 1183, 1483)
The maximum speed for the heating circuit pump can be specified using
this function.
Curve readj at 50% speed (888, 1188, 1488)
Correction of the flow setpoint with reduction of the pump speed by 50%.
The correction is calculated using the difference from the flow setpoint ac­
cording to the heating curve and current room setpoint.
Flow setp readj speed ctrl (890, 1190, 1490)
Here it can be specified whether the calculated flow setpoint correction is
included in the temperature request or not.
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