STIEBEL ELTRON LWZ 304 SOL Operation
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STIEBEL ELTRON LWZ 304 SOL Operation

Central ventilation appliance with heat recovery
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OPERATION
CENTRAL VENTILATION APPLIANCE WITH HEAT RECOVERY
» LWZ 304 SOL
» LWZ 404 SOL

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Summary of Contents for STIEBEL ELTRON LWZ 304 SOL

  • Page 1 OPERATION CENTRAL VENTILATION APPLIANCE WITH HEAT RECOVERY » LWZ 304 SOL » LWZ 404 SOL...

  • Page 2: Table Of Contents

    CONTENTS | OPERATION General information General information General information �����������������������������������������2 Safety instructions ����������������������������������������������� 2 This manual is intended for the appliance user and qualified con- Other symbols in this documentation ����������������������� 2 tractors. Units of measurement ������������������������������������������ 3 Safety ����������������������������������������������������������3 Note Intended use ������������������������������������������������������...

  • Page 3: Units Of Measurement

    OPERATION Safety f This symbol indicates that you have to do something. The ac- WARNING Injury tion you need to take is described step by step. The appliance may be used by children aged 8 and up and persons with reduced physical, sensory or mental capa- [MENU...] Square brackets around a text that starts with MENU bilities or a lack of experience and know-how, provided specify the position of a parameter in the menu tree.

  • Page 4: Operation

    OPERATION Operation tric emergency/booster heater is activated to safeguard heating With the scroll wheel, you can navigate the menu structure and operation and the provision of high DHW temperatures. In mono change values. energetic mode, the electric emergency/booster heater is activat- 4.1.1 Display ed as a booster heater.

  • Page 5: Activating

    OPERATION Operation Scroll wheel DHW heating: This symbol tells you that the system is heating DHW. Compressor: The compressor symbol signals that the compressor is running. Evaporator defrost: The evaporator is defrosting. Switching program enabled: If a switching program is enabled, this symbol is displayed.

  • Page 6: Menu Structure

    OPERATION Operation Menu structure 4.4.3 The menu key The menu key has two functions. If you are on the default screen, After enabling the programming unit, you can still see the start press MENU to enter the second level of the menu structure. screen.

  • Page 7: Appliance Functions

    OPERATION Operation Appliance functions Example 1 To enter set temperatures, a number surrounded by a circle ap- The appliance offers a range of functions that you can set with pears on the display. This indicates that you can change the value the programming unit.
  • Page 8 OPERATION Operation 4.7.2 Cooling 4.7.3 Ventilation Cooling is only possible in conjunction with a buffer cylinder or Here, you can set the parameters for the centralised ventilation of low loss header. Parameter COOLING MODE must be set to ON. your home. The menu consists of four subparameters. As a user Refer to your authorised contractor for the required adjustments.
  • Page 9 OPERATION Operation Fan output correction (stage 1/2/3) subject to humidity DHW COMPRESSOR DELAY (delay compressor DHW) For output stages 1, 2 and 3, the qualified contractor can activate a [MENU/SOLAR, P82] correction subject to humidity. This is made subject to the relative When the solar circuit pump runs, the compressor is blocked for humidity in the room.
  • Page 10 OPERATION Operation 4.7.8 HOLIDAY/PARTY - CONDENSER TEMP.: In the condenser, the refrigerant is lique- fied at high pressure. This releases heat which is transferred Holidays to the heating medium. During the holidays, if nobody is in the house, central heating, - EVAPORATOR TEMP.: In the evaporator, the refrigerant is DHW and ventilation are not required in their full scope.
  • Page 11 OPERATION Operation - HEAT M BOOST DHW TTL: Amount of heat that has been transferred by the electric emergency/booster heater to the DHW cylinder since the appliance was commissioned. - HEAT M RECOVERY DAY: Amount of heat that was recovered from the ventilation system on this day.
  • Page 12 OPERATION Operation Example 2 (heating curve 35/28) Generally, values below 50 (recommendation: 30) should be se- lected for heating circuit 1 in order to restrict the influence of the Heating curve 35/28 for underfloor heating (set room temperature flow temperature. Particularly in spring and autumn, the flow 20 °C, low end 1 °C, gradient 0.3, flow proportion 30 %, design temperature is subject to naturally strong fluctuations because of temperature -15 °C)
  • Page 13 OPERATION Operation f Scroll with the scroll wheel to select another day or group of The times are set as for the heating programs. You can select the days. set values for day and night mode as described in the DHW chapter. f Confirm your selection with OK.

  • Page 14: Selecting Operating Modes

    OPERATION Operation Selecting operating modes 4.8.5 DHW mode When the start screen is activated, the current operating mode DHW mode is enabled in accordance with the set time programs. is displayed. If you want to select another operating mode, scroll For the current pair of switching times, the DHW set day value with the scroll wheel.

  • Page 15: Fault Message

    OPERATION Operation 4.10 Fault message Quick access ventilation stages VENTILATION STAGES If the appliance registers a fault, this is clearly displayed with the message shown below. UNSCHEDULED VENT. WEDNESDAY 10 JUN 09 16:27 h FAULT UNSCHED. VENT TIME STAGE 2 CODE NO.

  • Page 16: Operating Modes Overview

    OPERATION Operation 4.11 Operating modes overview Here, you can see a graphic display of the operating mode se- lection. START SCREEN [ --> 4.8.1 ] STANDBY [ --> 4.8.2 ] AUTOMATIC [ --> 4.8.3 ] DAY MODE [ --> 4.8.4 ] SETBACK MODE [ --> 4.8.5 ] DHW MODE [ --> 4.8.6 ] MANUAL MODE [ --> 4.8.7 ] EMERGENCY OPERATION...
  • Page 17 OPERATION Operation ROOM TEMPERATURES HEATING HC1 ROOM TEMPERATURE DAY ROOM TEMP. NIGHT ROOM TEMP. STANDBY MANUAL SET HC ROOM TEMPERATURE BACK HEATING HC2 as per Heating HC1 as per Heating HC1 COOLING HC1 as per Heating HC1 COOLING HC2 BACK COOLING COOLING MODE HC1 NORMAL...
  • Page 18 OPERATION Operation VENTILATION PARAMETER DAY STAGE NIGHT STAGE STANDBY STAGE PARTY STAGE MANUAL STAGE UNSCHED. VENT TIME STAGE 0 UNSCHED. VENT TIME STAGE 1 UNSCHED. VENT TIME STAGE 2 UNSCHED. VENT TIME STAGE 3 HUMIDITY PROTECTION HUM. THRESHOLD VALUE HUM. MASKING TIME SET HUMIDITY MIN SET HUMIDITY MAX BACK...
  • Page 19 OPERATION Operation SOLAR SOLAR ACTIVATION TEMP. DIFFERENTIAL DHW COMPRESSOR DELAY DHW SOLAR TEMP. SOLAR HYSTERESIS Code required COLL. PROTECT TEMP Code required PRIORITY SOLAR COOLING TIME BACK TIME / DATE TIME / DATE SUMMERTIME MANUAL SUMMERTIME AUTOMATIC BACK HOLIDAYS-PARTY HOLIDAYS HOLIDAY STARTS HOLIDAY ENDS BACK...
  • Page 20 OPERATION Operation ACTUAL VALUES OUTSIDE TEMPERATURE ROOM TEMPERATURE HC1 SET ROOM TEMPERATURE HC1 RELATIVE HUMIDITY 1 ROOM TEMPERATURE HC2 SET ROOM TEMPERATURE HC2 RELATIVE HUMIDITY 2 HEAT M BOOST DHW TTL HEAT M RECOVERY DAY HEAT M RECOVERY TTL BACK HEATING HEATING CURVE HC1 GRADIENT...
  • Page 21 OPERATION Operation CONTRACTOR SWITCH ON MANUALLY Code required FAULT SEARCH FAULT MEMORY DELETE FAULT MEMORY Code required MEASURE FLOW RATE STOP EVENT BACK Code required EVAPORATOR REFRIGERATION UNIT Code required PUMP CYCLES Code required BACK PROGRAMS HEATING PROGRAM HC1 MONDAY SWITCHING TIMES PAIR 1 SWITCHING TIMES PAIR 2 SWITCHING TIMES PAIR 3...
  • Page 22 OPERATION Operation COMMISSIONING LANGUAGE TERMINAL ADDRESS Code required CONTRAST MAX. ADVANCE Code required SOFTWARE VERSION Code required DUAL MODE POINT Code required BOOSTER T ACTIVATE ROOM TEMP CORRECTION 1 Code required Code required ROOM TEMP CORRECTION 2 MAX FLOW TEMP HTG. Code required MAX FLOW TEMP DHW Code required...

  • Page 23: Cleaning, Care And Maintenance

    OPERATION Cleaning, care and maintenance Cleaning, care and maintenance Note Keep the air intake and discharge apertures on the exte- rior wall free from snow and leaves. Replacing supply air and extract air filters Shutting down ventilation: f Hold down MENU for five seconds. f If you have already navigated through the menu tree, press- ing MENU will return you to the default display.

  • Page 24: Troubleshooting

    OPERATION Troubleshooting The appliance leaks water Cleaning the extract and supply air valve filters f If installed, clean the extract air valve filters through which If water escapes from the appliance, shut it down immediately and air is extracted from the rooms. notify your local contractor.

  • Page 25: The Accommodation Is Too Cold In Winter

    OPERATION Troubleshooting 6.10 The accommodation is always too hot If you cannot remedy the fault, notify your qualified contractor. To facilitate and speed up your request, provide the number from Reduce the low end temperature of the heating curve by the the type plate (000000-0000-000000).
  • Page 26 GUARANTEE | ENVIRONMENT AND RECYCLING Guarantee The guarantee conditions of our German companies do not apply to appliances acquired outside of Germany. In countries where our subsidiaries sell our products a guarantee can only be issued by those subsidiaries. Such guarantee is only grant- ed if the subsidiary has issued its own terms of guarantee.
  • Page 27 NOTES www.stiebel-eltron.com LWZ 304-404 SOL |...
  • Page 28   Deutschland Verkauf Tel. 05531 702-110 | Fax 05531 702-95108 | info-center@stiebel-eltron.de STIEBEL ELTRON GmbH & Co. KG Kundendienst Tel. 05531 702-111 | Fax 05531 702-95890 | kundendienst@stiebel-eltron.de Dr.-Stiebel-Straße 33 | 37603 Holzminden Ersatzteilverkauf Tel. 05531 702-120 | Fax 05531 702-95335 | ersatzteile@stiebel-eltron.de Tel.

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