OPERATION
Menu structure
www.stiebel-eltron.com LWZ304-404 SOL | 25
Menu item/parameter Options Direct Unit Dis-
play
only
Min. Max. Standard
LWZ 304 SOL
[ L W Z 4 0 4 S O L ]
Energy sav-
ing recom-
mendation
System
value
SWITCH ON MANUALLY
CONTROL VALVE HTG OFF| ON OFF
CONTROL VALVE DHW OFF| ON OFF
SOLAR PUMP OFF| ON OFF
CONDENSATE PUMP OFF| ON
OFF
MIXER PUMP OFF| ON OFF
MIXER OPEN OFF| ON OFF
MIXER CLOSED OFF| ON OFF
DIVERTER VALVE OFF| ON OFF
COMPRESSOR OFF| ON OFF
BOOSTER STAGE 1 OFF| ON OFF
BOOSTER STAGE 2 OFF| ON OFF
BOOSTER STAGE 3 OFF| ON OFF
EXTRACTOR SPEED OFF| ON OFF
VENTILATOR SPEED OFF| ON OFF
NIGHT VENTILATION OFF| ON OFF
WINDOW OPEN OFF| ON OFF
CONTACT COOLING OFF| ON OFF
EVAPORATOR
DEFROST END TEMP. °C 0 30 15
MAX DEFROST DUR. min 2 60 10
BOOSTER REFR. GUARD °C 10 30 15
DEFRORST STOP °C 0 20 10
REFRIGERATION UNIT
COMPRESSOR CYCLING 47 min 0 20 20
EXPELLED AIR SPEED 48 10 100 60 [70]
PUMPS
PUMP SPEED DHW % 40 100 60
PUMP SPEED HEATING % 40 100 60
MIXER P. RUN-ON min 0 120 10
PUMP CYCLES
MINIMUM CYCLES 54 1/d 1 24 1 1
MAXIMUM CYCLES 55 1/d 25 288 100 50
OUTSIDE TEMP MIN CYC 57 °C 0 25 20 25 for utilisation
of solar energy
OUTSIDE TEMP MAX CYC 56 °C 0 20 0 0
CONDENSATE PUMP
RUN-ON SWITCH P47 min 0 20 0.5
DEFROST RUN-ON MAX P48 % 0.1 36 12
EMERGENCY MODE AUTO OFF| ON OFF
POWER-OFF 0 5 0
PROCESS VALUES
FAN (PRC) % X
OUTSIDE TEMPERATURE °C X
E VAP. OUT L E T T E MP. °C X
HOT GAS TEMPERATURE °C X
FLOW TEMPERATURE °C X
CONDENSER TEMP. °C X
RETURN TEMPERATURE °C X
CO O L ING T EMP. °C X
HIGH PRESSURE bar X
LOW PRESSURE bar X
LP FILTERED bar X
POSITION VALVE X
PROCESS STATUS
HP SWITCH OFF| ON X
LP SWITCH OFF| ON X
DEFROST SIGNAL OFF| ON X
COMPRESSOR OFF| ON X
DHC 1 OFF| ON X
DHC 2 OFF| ON X
DHC 3 OFF| ON X
DEFROST VALVE OFF| ON X
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