STIEBEL ELTRON WPM - Page 26

COMMISSIONING
Menu
26 | WPM www.stiebel-eltron.com
Menu: SETTINGS
ON
In order to prevent energy being drawn from the cylinder via the
heating circuit pumps during DHW heating, the heating circuit
pumps are shut down during this period.
OFF
During DHW heating, the heating circuit pumps remain on.
 WW OUTPUT WP
Note
The actual output may differ from the selected output de-
pending on the operating point and ambient conditions.
Air/water heat pumps
Different heating outputs from the heat pump for DHW mode can
be specified, depending on the outside temperature.
They are set using the parameters WWOUTPUTSUMMER and
WWOUTPUTWINTER.
 WW OUTPUT SUMMER
With this parameter, you can specify the heat pump output for
DHW heating during the summer.
The output can be reduced to optimise heat pump efficiency in
DHW mode.
 WW OUTPUT WINTER
With this parameter, you can specify the heat pump output for
DHW heating during the winter.
To achieve a short heat-up time for DHW heating when the heating
energy demand is high, a higher output can be set for DHW mode.
 MAXIMUM FLOW TEMPERATURE
With this parameter, you can specify a maximum flow tempera-
ture. When the set flow temperature is reached, the compressor
is switched off and the idle time is set.
 PASTEURISATION
ON
If pasteurisation is activated, the contents of the DHW cylinder
are heated to the temperature that can be set here. You define
the time at which the heating takes place in the PROGRAMS/
PASTEURISATION PROGRAM menu. The high DHW temperature
kills off any legionella bacteria in the water.
Once the temperature set here has been reached, the set DHW
temperature is returned to the value stored in the SETTINGS/
DHW TEMPERATURES menu.
Proper pasteurisation can take place only if it is ensured that the
heat pump system reaches the necessary set temperature.
Pasteurisation can only occur if the electric emergency/booster
heater is connected, or EXTERNAL HEAT SOURCE has been defined
for DHW heating. The parameter WW LEARNING FUNCTION must
be set to OFF.
OFF
No pasteurisation takes place.
 SET TEMPERATURE
In this menu item you can set the temperature for pasteurisation.
The factory setting is 60°C.
 ELECTRIC REHEATING
In the case of electric reheating, the emergency/booster heater is
activated for DHW heating according to the setting (parameters
DUAL MODE TEMP WW and LOWER APP LIMIT WW).
 DUAL MODE TEMP WW
Dual mode temperature of the heat pump for DHW heating.
Below this outside temperature, the electric emergency/booster
heater is switched on for DHW heating, subject to load.
 LOWER APP LIMIT WW
Lower application limit of the heat pump for DHW heating.
The heat pump is switched off at outside temperatures below the
selected lower DHW application limit. The electric emergency/
booster heater alone provides DHW heating.
 EXTERNAL HEAT SOURCE
When this function is activated, no DHW circulation function can
be used.
 OFF
 Choose this setting if there is no external heat source in-
stalled in the heat pump system.
 SUPPORTED
The external heat source backs up the heat pump during DHW
heating below the dual mode point (parameter DUAL MODE TEMP
WW). To control the external heat source to cover a DHW demand
in this setting, output X2.11 is switched.
 ALONE
At this setting, the external heat source alone will provide DHW
heating below the dual mode point. To control the external heat
source to cover a DHW demand in this setting, output X2.11 is
switched.
 INDEPENDENT
At this setting, only the external heat source will provide DHW
heating, regardless of the dual mode point. To control the external
heat source to cover a DHW demand, outputs X2.8 and X2.11 are
switched.