OPERATION
Menu structure
www.stiebel-eltron.com LWZ304-404 SOL | 19
7. Menu structure
Note
Some menu items are protected by a code and can only
be accessed and adjusted by a qualified contractor.
Menu item/parameter Direct Unit Description
ACTUAL VALUES
ROOM TEMPERATURE
ROOM TEMPERATURE HC1
°C
If an external programming unit is connected and assigned to the heating circuit, the temperature
measured in the programming unit is displayed. If the heating circuit has no programming unit as-
signed, the actual set room temperature is displayed as a substitute value.
SET ROOM TEMPERATURE HC1 34 °C
RELATIVE HUMIDITY HC1
%
If an external programming unit is connected and assigned to the heating circuit, the humidity meas-
ured in the programming unit is displayed. If the heating circuit has no programming unit assigned,
0% is displayed.
ROOM TEMPERATURE HC2
°C
If an external programming unit is connected and assigned to the heating circuit, the temperature
measured in the programming unit is displayed. If the heating circuit has no programming unit as-
signed, the actual set room temperature is displayed as a substitute value.
SET ROOM TEMPERATURE HC2 °C
RELATIVE HUMIDITY HC2
%
If an external programming unit is connected and assigned to the heating circuit, the humidity meas-
ured in the programming unit is displayed. If the heating circuit has no programming unit assigned,
0% is displayed.
HEATING
OUTSIDE TEMPERATURE 32 °C
ACTUAL VALUE HC1
°C
Heating circuit temperature, calculated from the flow and return temperatures, weighted with the
value set under “FLOW PROPORTION”. Whilst DHW is being heated, this parameter indicates the tem-
perature with which the DHW cylinder is being heated.
SET VALUE HC1 °C Default temperature for the heating circuit
ACTUAL VALUE HC2 °C
SET VALUE HC2 °C
FLOW TEMPERATURE °C The flow is the heating pipework between heat pump and heat consumer (radiator or indirect coil
inside the DHW cylinder). Here you can see the temperature of the water in this pipe section.
RETURN TEMPERATURE °C The return is the heating pipework between heat consumer and the heat pump. Here you can see the
temperature of the water in this pipe section.
PRESSURE HTG CIRC bar
FLOW RATE l/min
DHW
DHW TEMPERATURE °C Shows the current cylinder water temperature
DHW SET TEMPERATURE °C
VENTILATION
SUPPLY AIR ACTUAL Hz Indicates the current supply air fan speed.
SUPPLY AIR SET
m³/h
This value indicates the percentage of maximum control voltage with which the supply air fan oper-
ates. Supply air is the heated outdoor air that is blown into the ventilation area (living room, bed-
room, nursery).
EXTRACT AIR ACTUAL Hz Current speed of the extract air fan
EXTRACT AIR SET m³/h This value indicates the percentage of maximum control voltage with which the extract air fan oper-
ates. Extract air is the stale air that is extracted from the extract air area (bathroom, kitchen, WC).
EXTRACT AIR HUMIDITY %
COOLING
DEW POINT TEMP. HC1 °C
DEW POINT TEMP. HC2 °C
SOLAR
COLLECTOR TEMP. °C Temperature of the solar collector
HEAT GENERATOR
HEATING STAGE
HEAT PUMP
HOT GAS TEMPERATURE °C This value specifies the temperature of the gaseous refrigerant at the condenser inlet.
HIGH PRESSURE bar
LOW PRESSURE bar
EVAPORATOR TEMP. °C In the evaporator, the refrigerant is evaporated at low pressure. As this happens, heat is extracted
from the air flow.
CONDENSER TEMP.
°C
In the condenser, the refrigerant is liquefied at high pressure. This releases heat which is transferred
to the heating medium. In the condenser, the refrigerant is liquefied at high pressure. This releases
heat which is transferred to the heating medium.
EXHAUST AIR ACTUAL Hz Current speed of the exhaust air fan
EXHAUST AIR SET Set flow rate of the heat pump fan
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