STIEBEL ELTRON WPM 3

OPERATION
Menu structure
24 | WPM 3 www.stiebel-eltron.com
WW LEARNING FUNCTION
When heating DHW, the system automatically adjusts the DHW
temperature (self-learning function).
Setting OFF
As soon as the heat pump is shut down in DHW mode via the HP
sensor or via the hot gas temperature limit, the electric emer-
gency/booster heater is added as a booster stage until the set
DHW temperature is reached. If the maximum flow temperature
is achieved in this operating mode, DHW heating is terminated,
and the set DHW temperature overwritten with the current actual
DHW temperature.
Setting ON
As soon as the heat pump is shut down in DHW mode via the HP
sensor or the hot gas temperature limit, DHW heating is termi-
nated and the set DHW temperature overwritten with the current
actual DHW temperature. This operating mode saves energy, as
DHW is exclusively heated by heat pump.
COMBI CYLINDER
As soon as you set the parameter to ON, the heating circuit pumps
are switched off during DHW heating.
(Only in conjunction with the SBS instantaneous water cylinder)
You should set this parameter to ON if the heating circuit pump
needs to be switched off during DHW charging, due to a special
hydraulic system ON/OFF switch.
WW OUTPUT WP
To reach a suitable compromise between heat pump efficiency
and DHW convenience, it is advisable to specify different heat
pump heating outputs in DHW mode, subject to outside temper-
ature. This is achieved by using the two parameters WW OUTPUT
SUMMERand WW OUTPUT WINTER to set the heating output of
the heat pump in DHW mode for outside temperatures between
- 20°C and + 20°C.
If during DHW heating the outside temperatures are low or the
flow temperatures are rising, then the heating output of the heat
pump may be below the selected heating output.
WW OUTPUT SUMMER
Output can be reduced to optimise heat pump efficiency in DHW
mode.
WW OUTPUT 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
Maximum heat pump flow temperature for heating with a flow
temperature sensor connected
This setting limits the flow temperature of the heat pump and the
electric emergency/booster heater in heating mode.
PASTEURISATION
The DHW cylinder is heated daily at 01:00 h to 60 °C if pasteurisa-
tion has been enabled. Pasteurisation can only occur if the elec-
tric emergency/booster heater is connected, or EXTERNAL HEAT
SOURCE has been defined for DHW heating.
ELECTRIC REHEATING
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 heat-
ing.
EXTERNAL HEAT SOURCE
As soon as the second external heat source is active for DHW
heating, the DHW circulation output no longer switches according
to the DHW program (see chapter “Operation/ Menu structure/
MenuPROGRAMS/ DHW program”).
You can achieve higher temperatures for DHW heating with the
second heat source (up to 80 °C).
SUPPORTED
HS2 then backs up the heat pump during DHW heating below the
dual mode point (parameter DUAL MODE TEMP WW). To control
HS2 to cover a DHW demand in this setting, the output of the DHW
circulation pump is switched.
ALONE
At this setting, only HS2 will provide DHW heating below the dual
mode point. To control heat source2 to cover a DHW demand in
this setting, the output of the DHW circulation pump is switched.
INDEPENDENT
At this setting, only heat source2 will provide DHW heating, inde-
pendent of the dual mode point. To control heat source2 to cover
a DHW demand, the outputs of the DHW circulation pump + DHW
charging pump are switched.
Once this setting has been selected, the DHW STAGES parameter
must be set to "0", as the heat pump no longer provides DHW
heating.
DUAL MODE TEMP WW
Dual mode temperature (outside temperature) of the heat pump
for DHW heating.
Depending on the parameter set (SUPPORTED, ALONE, INDEPEND-
ENT), the second heat source is responsible for DHW heating.
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 second heat source is
solely responsible for DHW heating.