STIEBEL ELTRON WPM 3

OPERATION
Menu structure
www.stiebel-eltron.com WPM 3| 23
STANDARD SETTING
DHW MODE
Parameter DHW MODE enables 3 different setting options.
These are priority, parallel and partial priority operation.
Note
The HM(S) (Trend) hydraulic module can only run in PAR-
ALLEL OPERATION.
PRIORITY OPERATION
1
4
3
2
D0000039600
1 Heat pump DHW flow
2 Heat pump DHW return
3 Cylinder flow
4 Cylinder return
With priority operation, only the heat pump preselected for DHW
remains on or is switched on. In other words, DHW heating takes
priority over heating within a heat pump cascade. Only the DHW
charging pump runs with the corresponding heat pump.
PARALLEL OPERATION
D0000039601
1
4
3
2
1 Heat pump DHW flow
2 Heat pump DHW return
3 Cylinder flow
4 Cylinder return
In parallel operation, all heat pumps remain switched on or the
heat pumps programmed for DHW heating are switched on. The
DHW and buffer charging pumps of the corresponding heat pumps
operate. When operating with a heat pump in DHW mode, the
DHW and buffer charging pumps are always switched on, even if
there is no heat demand.
PARTIAL PRIORITY
1
4
3
2
D0000039602
1 Heat pump DHW flow
2 Heat pump DHW return
3 Cylinder flow
4 Cylinder return
With partial priority, all heat pumps remain switched on or the
heat pumps programmed for DHW switch on with the DHW charg-
ing pump; the remaining heat pumps switch on with the buffer
charging pump for heating mode. This operation is only appro-
priate for cascades.
DHW HYSTERESIS
This is where you determine the switching hysteresis for DHW
heating.
- Starting DHW heating at the set DHW temperature minus the
hysteresis value.
DHW STAGES
Heat pump stages for DHW
Here you can preselect the number of heat pump stages for DHW
heating.
AUTOMATIC DHW CONTROL
Automatic DHW mode subject to the outside temperature. Menu
item AUTOMATIC DHW CONTROL can be switched on or off. For
multi stage WPL or in cascade mode, DHW heating takes place
subject to load and outside temperature. In addition an adjustable
outside temperature can be selected.
Setting range: -15 °C to + 30 °C, default setting 5 °C. Above 5.1 °C,
only one heat pump stage provides DHW.
Stage 1 starts at 5.0°C, stage 2 is added 10s laterand so on. All
DHW stages must be enabled as soon as AUTOMATIC DHW CON-
TROL is utilised.
OUTSIDE TEMPERATURE
The heating output of an air/water heat pump decreases as the
outside temperature falls. DHW heating always starts with the first
stage. To meet the energy demand for DHW heating, additional
DHW stages are automatically enabled subject to the outside tem-
perature set here.
 Set the outside temperature from which the additional DHW
stages should be enabled.