STIEBEL ELTRON WPM - Heating; Dhw; Compressor

COMMISSIONING
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Menu: COMMISSIONING
Only applicable to spread control:
The time taken to achieve the set spread can vary on account of
this setting.
 MAXIMUM PUMP RATE
With this parameter, you set the maximum flow rate and therefore
the pump rate. The pump rate will not exceed the value set here.
Only applicable to spread control:
The time taken to achieve the set spread can vary on account of
this setting.
 HEATING
 CONTROLLER DYNAMICS
The CONTROLLER DYNAMICS parameter influences the stabilisa-
tion speed of the heat pump output controller.
The heat pump output controller functions primarily as an integral
controller. The control deviation (the differential between actual
and set heating circuit temperatures) is accumulated over time.
The result is the integral of the control deviation in Kelvin minutes.
Every time the switching value adjustable with this parameter is
reached, the output is switched one stage higher or lower.
Example: Where the control deviation is 5K, it takes 10minutes
for the switching value of 50Kmin to be reached. The compressor,
or in a cascade the next compressor stage, then switches and the
integral of the control deviation is reset to zero.
Normally, the preselected CONTROLLER DYNAMICS should be suf-
ficiently fast and operate without oscillation. Heating systems that
respond quickly require a lower value, whilst very slow responding
systems require a higher value to be set.
 HYSTERESIS
For on/off heat pumps with buffer cylinder, you can set here the
start hysteresis for the heat pump.
 SPREAD CONTROL
The flow rate for the circulation pump is controlled automatically
by the heat pump.
 SET SPREAD
 Here, you can set the temperature differential between the
flow and return sensors.
The heat pump keeps the temperature differential constant at the
set value by adjusting the circulation pump flow rate accordingly.
 MAXIMUM PUMP RATE
With this parameter, you set the maximum flow rate and therefore
the pump rate. The pump rate will not exceed the value set here.
The time taken to achieve the set spread can vary on account of
this setting.
 STANDBY PUMP RATE
 Here, you can set the minimum pump rate for the internal
circulation pump while the heat pump is idle.
The pump will run at the output set here as long as the heat pump
does not receive a heat demand, as well as during power-OFF
periods and idle times.
 HEATING CIRC PUMP RATE
 Set the flow rate via the heating circuit pump output. Please
also note the information on flow rate (see chapter "Specifi-
cation/ Data table" in the operating and installation instruc-
tions for the heat pump).
 DHW
 DHW CIRCUIT PUMP RATING
 Set the maximum flow rate via the DHW pump output. If
noise occurs, reduce the output.
 COMPRESSOR
 MINIMUM DEFROST TIME
 Set here the defrost time for the heat pump defrost
procedure.
The selected time applies to manual or demand-dependent de-
frosting.
 START DEFROST
Manual defrost can be started only if the heat pump is in oper-
ation.
The defrost signal is displayed.
Maximum defrost time
The maximum defrost time for all heat pumps is 20minutes. De-
frosting is terminated after the maximum defrost time has elapsed.
The heat pumps are then forced to operate in heating mode for
20minutes. Only then can a new defrost process be initiated.
 IDLE TIME
To protect the compressor, an idle time is set following shutdown
of a heat pump. The default idle time of 10or20minutes (accord-
ing to heat pump type) should normally not be reduced. Where
a reduction is required because of adjustments or repair work,
reset the idle time back to 10or20minutes after completing the
necessary work.
 MAXIMUM CURRENT
This parameter can be used to limit the maximum power con-
sumed by the heat pump to match it to the power supply conditions
at the installation site.
Please note that high flow temperatures or low outside tempera-
tures may cause the heating output to be reduced.