STIEBEL ELTRON LWZ 304 SOL, Installation Manual

Page 1: ...INSTALLATION Central ventilation appliance with heat recovery LWZ 304 SOL LWZ 404 SOL ...

Page 2: ...ng 26 6 1 Checks before commissioning 26 6 2 Commissioning 26 6 3 Recommissioning 28 7 Settings 28 7 1 Menus and parameters 28 ACTUAL VALUES 28 DIAGNOSIS 29 PROGRAMS 29 STANDARD SETTING 29 SETTINGS 29 HEATING 29 DHW 30 VENTILATION 32 COOLING 34 SOLAR POWER 34 DRY HEATING PROGRAM 35 COMMISSIONING 36 CONTRACTOR 36 ENTER CODE 36 FAULT SEARCH 36 SWITCH ON MANUALLY 36 EVAPORATOR 37 REFRIGERATION UNIT 3...

Page 3: ...cuments 296066 LWZ 304 404 SOL operation 1 2 Standardised output data Explanations to determine and interpret the specified standardised output data 1 2 1 Standard EN 13141 7 EN 14511 EN 16147 The output data specifically mentioned in text diagrams and technical datasheets has been calculated according to the test conditions of the standard shown in the heading of this section Generally these stan...

Page 4: ...the mechanical ventilation system is switched off and cannot be started Note Operation on alternate sides is not recommended be cause in this case central heating and DHW heating are carried out by the electric emergency booster heater Simultaneous operation WARNING INJURY Ensure that no flue gas can enter the installation room and that combustion equipment will always be supplied with sufficient ...

Page 5: ...d accessories Air hose with thermal insulation 4 m Thermally insulated wall outlet with external wall grille 3 3 Further accessories Additional programming unit with wall mounted casing Spare filter set Diverter hood enables the appliance to be sited in rooms with 2 20 m head height Silencer DN 315 Relay set WPM RBS Segmented anode Starting current limiter 25 A part number 281546 DHW circulation p...

Page 6: ...Cooling is not possible in manual mode Cooling function Parameter COOLING MODE must be set to ON Cooling is ena bled when the appliance is in summer mode and the outside tem perature exceeds the set room temperature for heating parameter ROOM TEMPERATURE DAY in menu HEATING ROOM TEMPER ATURES HC1 or ROOM TEMPERATURES HC2 for 2 hours by 3 K If the room temperature is then higher by the value set un...

Page 7: ...he floor must have sufficient load bearing capacity In ad dition to the appliance weight also take that of the cylinder content into account The substrate must be horizontal level solid and permanent When installing the appliance inside a boiler room ensure that the boiler operation is not impaired The quantity of refrigerant makes it necessary to observe the minimum volume of the installation roo...

Page 8: ...tions Outdoor exhaust air connection with air hose 2500 2255 500 R 365 600 100 D0000019265 Connecting outdoor air to geothermal heat exchanger 300 2 1 D0000019266 1 Filter box Outdoor air domestic ventilation connection option 300 1000 D0000019267 1 1 Filter box ...

Page 9: ...outed on or in the wall and that the air ducts have anti vibration separation If the appliance installation room is included in the building ven tilation system an extract air valve and supply air valve must be planned in To avoid the need for an overflow aperture in the door the supply air and extract air flow rates must be balanced Note The appliance can seem loud if operated in an unfinished bu...

Page 10: ...ygen diffusion Material losses Avoid open heating systems and plastic pipes in under floor heating systems which are permeable to oxygen If plastic pipes in underfloor heating systems that are permeable to oxygen or open heating systems are used oxygen diffusion can cause corrosion on the steel components of the indirect coil in the DHW cylinder steel radiators or steel pipes Material losses The p...

Page 11: ...ory on the l h side of the function module f f Lift the fascia frame slightly and remove the fascia from the function module f f Undo both support screws from which the fascia was hung from the lateral cross bar of the function module If these support screws are not removed they would be in the way when pushing the function and cylinder modules together and securing them with screws Put the suppor...

Page 12: ...hole for a folded spiral seam tube DN 160 in the centre of the knock out in the EPS thermal insulation f f Push the folded spiral seam tube through the hole max 30 mm deep f f Seal the gap between the folded spiral seam tube and the EPS insulation with sealing tape f f Pull out the cross countercurrent heat exchanger f f Grasp the outdoor air filter cassette by the grip holes and pull it out f f P...

Page 13: ...is being filled with water Note The adjustable feet must not be fully screwed in oth erwise you will not be able to push the joining bracket between the bottom panel and the foot 26_04_01_0552 f f Undo the cover screws on the cylinder module f f Reach through the port on the r h side of the cylinder mod ule and push the cylinder module cover upwards f f Remove the cylinder module cover 26_04_01_05...

Page 14: ...it Retain the fixing screws these are required later for the assembly Cylinder temperature sensor and anode cable f f Remove the cable tie that tie together the electrical cables of the anode terminal and the cylinder temperature sensor lead f f Pull the connecting cables leads of the anode and the cylin der temperature sensor through the aperture located on the top r h side in the cylinder module...

Page 15: ...ing anti clockwise exposes more of the adjustable feet mean ing the appliance moves upwards The cylinder module must be snug against the function module 26_04_01_0560 1 2 4 3 3 1 Terminal bracket 2 Joining plates 3 Spacer 4 Horizontal locking bracket f f Guide the terminal bracket forwards out of the cylinder module f f Offer the terminal bracket up to the front of the cylinder module frame Ensure...

Page 16: ...aulic connection between the function and cylinder module is provided by three pipes DHW flow heating flow and common return f f Make sure that the caps have been removed from the pipes 5 3 1 How the push fit connectors work Material losses Never install the push fit connectors in the DHW line Never install the push fit connectors to the solar flow or solar return connections Only install the push...

Page 17: ...air vent valve at the highest point of the heating system f f Thoroughly flush the pipework before connecting the ap pliance Foreign bodies such as welding pearls rust sand sealant etc can impair the operational reliability of the ap pliance and can lead to the condenser becoming blocked f f Remove the protective caps from the heating flow and heat ing return connections Heating return connection ...

Page 18: ...osses Never install the push fit connectors in the DHW line Never install the push fit connectors to the solar flow or solar return connections Only install the push fit con nectors in the heating circuit Stainless steel zinc plated steel copper or plastic pipework are approved materials for the cold water line We approve stainless steel copper or plastic pipework for the DHW line f f Remove the p...

Page 19: ...he cap from the drain connection f f Connect the fill hose 1 D0000038979 1 Air vent valve on the multi function assembly f f Open the air vent valve of the multi function assembly by turning anti clockwise D0000038979 1 1 Air vent valve on the circulation pump f f Open the air vent valve on the circulation pump by pulling its head upwards f f After venting check whether the air vent valve of the m...

Page 20: ...e position of the condensate pump in the function module The condensate pump must be lying entirely on the floor Drain of the pressure relief valve On the r h side of the appliance the safety valve drain connection also routes the pressure relief valve discharge hose out of the casing Ensure that draining water can run off freely 5 9 Power supply WARNING Electrocution Only qualified electricians m...

Page 21: ...on L N O K Oven fireplace option L L P S Solar circuit pump option L N SL Quick acting air vent valve option L L FA Window open option L N The SL terminal is a 230 V input for activating ventilation by means of a pushbutton The FA terminal is a 230 V output for switching an automatically controlled window with passive cooling for example The KUE is a 230 V output for activating the cooling circuit...

Page 22: ... the cylinder foam has no function for this appliance Outside temperature sensor AFS 2 The outside temperature sensor should be freely exposed to the elements Never fit it above win dows doors light wells or air ducts and never subject it to direct insolation Install the outside temperature sensor on a north or north east facing wall on the exterior side of a heated room Never install the outside ...

Page 23: ... m Note Observe correct separation when installing the BUS cable the mains power cable and the sensor leads 5 9 10 Safety temperature controller for underfloor heating system Material losses In order to prevent excessively high flow temperatures in the underfloor heating system in the event of a fault we always recommend using a safety temperature controller to limit the system temperature 5 10 Fi...

Page 24: ...e discharge air exhaust air to the outdoors see chapter Required accessories These are highly flexible thermally insulated and self extinguishing in case of fire in accordance with ASTMD 1692 67 T 5 11 1 Information on routing the air hoses f f Use a sharp knife to trim the hose to the required length Cut the Bowden core using wire cutters If you need to extend the air hose push the core of two ho...

Page 25: ...xtract air and supply air pipes are routed through un heated rooms they must be thermally insulated If when connect ing a geothermal heat exchanger the outdoor air pipe is routed through heated rooms this pipe must also be thermally insulated with vapour diffusion proof material 5 12 1 Silencers Fit silencers as near as possible to the appliance into the extract air and the supply air flows Fit a ...

Page 26: ...re the exterior wall outlets free from leaves and other contamination Note Never fit any additional fly screens in the wall outlets 6 1 4 Cylinders Has the cylinder been filled hot tap open until water flows out Has a pressure reducing valve been installed if the water pressure is above 80 of the permissible pressure D0000051625 1 1 Plastic union nut Material losses The torque of the plastic union...

Page 27: ...ch the controller MCBs back ON The compressor starts after some time Note Check the exhaust air fan If the exhaust air fan drags switch off the appliance and align the exhaust air fan See chapter Troubleshooting f f Start the dry heating program Ensure that all radiators or heating circuits are and remain open Once the appliance has operated in the dry heating program without fault for at least tw...

Page 28: ...re sure that no more large amounts of dust are going to be generated f f Set the DAY STAGE parameter P07 to 2 f f Set the NIGHT STAGE parameter P08 to 1 f f Set the Standby stage parameter P09 to 0 f f Set the MANUAL STAGE parameter P12 to 2 f f Set the PARTY STAGE parameter to 3 f f Set the DUAL MODE POINT parameter P78 in accordance with the heat demand of the building If the appliance is design...

Page 29: ... when the heating output of the heat pump is no longer adequate MAX FLOW TEMP HTG Under MAX FLOW TEMP HTG the maximum flow temperature can be set according to local conditions for example to protect an underfloor heating system from excessive temperatures If this temperature is exceeded the compressor and electric emergency booster heater are switched off This is a limiter function Compressor and ...

Page 30: ... Before the deviation from the set value becomes too large the heating stages are started or stopped temporarily through the integral component Asymmetry of hystereses If the heating temperature severely overshoots the set tempera ture it may be necessary to reduce the hystereses above the set value The hystereses above the set value are divided by the value set under the ASYMMETRY OF HYST paramet...

Page 31: ...ter is used for higher set DHW temperatures Note DHW heating may possibly not complete if the electric emergency booster heater has been blocked because the high limit safety cut out has tripped or the electric emergency booster heater has been switched off via an external MCB The entire room heating system is then blocked for the time set under MAX DHW HTG DUR When outside temperatures are low DH...

Page 32: ...pen the windows in rooms supplied with air living room nursery and bedrooms for example using the WINDOW OPEN control signal SUPPLY AIR The extract air fan is stopped and the supply air fan out put is increased by 20 In this case you do not have to open the windows However this option is less effective and does not work in very airtight houses i e if in the blower door test the air change value n5...

Page 33: ...ameter determines the percentage by which the fan output is to be reduced if the value set in the SET HUMIDITY MIN parameter is not reached by a margin greater than the HUMIDITY HYSTERESIS In the delivered condition OUTPUT INCREASE and OUTPUT REDUCTION are set to 0 This disables the correction of fan output subject to humidity The percentage entered with the OUTPUT INCREASE and OUTPUT REDUCTION pa...

Page 34: ...ll be enabled if it lies above this value by the hysteresis set in parameter HYST FLOW TEMP SOLAR POWER Option SOLAR HYSTERESIS COLLECTOR TEMP LIMIT COLL PROTECT TEMP COLL CUT OFF TEMP COLLECTOR PROTECTION OFF ON PRIORITY SOLAR SOLAR COOLING COOLING TIME COOLING TIME COOLING TIME START COOLING TIME END SOLAR HYSTERESIS SOLAR HYSTERESIS in combination with TEMP DIFFERENTIAL serves as a threshold fo...

Page 35: ...meter to ON The appliance heats until the LOW END TEMPERATURE P71 has nearly been reached max deviation 5 C After that the low end temperature is constantly maintained for the number of days set under TEMP RISE PERIOD The set temperature is then increased by the value set under GRADIENT given in Kelvin per day K d Dry heating program curve 5 7 4 6 3 2 D0000039378 1 X Time Y Temperature 1 START 2 L...

Page 36: ...ITION If you give this parameter the value ON then all parameters will be reset to their factory settings All changes made will be lost Even the appliance type will need to be re entered under the Appliance type parameter The delivered condition only loads the default values it does not reset any component APPLIANCE TYPE You can set the appliance type here Note Changing the APPLIANCE TYPE paramete...

Page 37: ... EXPELLED AIR SPEED Direct line P48 This parameter enables you to set the speed of the exhaust air fans as a percentage of the maximum speed The exhaust air fan should always be set to 70 to ensure efficient heat pump operation PUMPS PUMP SPEED DHW This parameter enables you to set the speed of the internal circu lation pump during DHW heating PUMP SPEED HEATING This parameter enables you to set t...

Page 38: ...gency booster heater for DHW heating is started after the saved delay time stored in the Booster timeout parameter has expired 2 The heat pump is blocked The electric emergency booster heater is enabled for DHW heating after a delay time of 10 minutes has elapsed The electric emergency booster heater is blocked above the dual mode point for heating 3 The heat pump is blocked The electric emergency...

Page 39: ...e DHW demand is not excessive The electric emergency booster heater starts subject to output However it may occur that the electric emergency booster heater starts even though the heating output of the heat pump would still be sufficient To prevent this the dual mode point P78 above which the electric emergency booster heater is blocked should be set to 5 C The factory setting is 0 C Note On accou...

Page 40: ...al losses f f Mark the appliance to enable the recognition that the appliance has been fully shut down and that it must be refilled checked and commissioned before restarting f f Mark the appliance with the date when it was shut down 9 Troubleshooting 9 1 Exhaust air fan is catching If the exhaust air fan drags return it into its correct position D0000038984 1 2 1 Fixing screw on the r h side pane...

Page 41: ... was therefore stopped by the high limit safety cut out The external filter on the return is contaminated Clean the filter The pump has seized Ensure its function or replace the pump The flow rate through the heat pump is too low for example if the ther mostatic valves on all the radiators or the zone valves in the underfloor heating system are closed If you add the flow rate to Favourites you can...

Page 42: ... is blocked until it has been isolated from the power supply Isolate the appliance across all poles from the mains power for approx one minute If the fan repeatedly fails to start inform customer support 07 Exhaust air fan The fan speed is not correct The fan will be blocked The heat pump will be blocked The fans are protected by a fuse against excess current If one of these fuses has blown the fa...

Page 43: ...r one second If this faults occurs repeatedly notify customer support 22 Hot gas temperature sensor The compressor is switched off at outside temperatures 10 C and condenser temperatures 40 C The measured sensor values have been constantly outside the permissi ble range for a specified period Press the electronics reset button for one second If this faults occurs repeatedly notify customer support...

Page 44: ...ow rate has not been achieved The electric emergency booster heater will be blocked This fault may occur following vent ing or due to leaks Top up with water 40 Float switch bottom panel The heat pump and the ventila tion are switched off The cause is the defrost pan over flowing or leaks in the heating or DHW circuit of the appliance This fault may reset automatically Check for leaks Check the fl...

Page 45: ...lush the cross countercurrent heat exchanger with warm water f f Let the cross countercurrent heat exchanger dry out 10 2 Cleaning the outdoor air filter The outdoor air filter is fitted downstream of the cross counter current heat exchanger 1 2 3 26_04_01_0613 1 Upper front panel 2 Cross countercurrent heat exchanger 3 Outdoor air filter cassette f f Pull out the cross countercurrent heat exchang...

Page 46: ...e f f Remove contaminants and blockages Note Check the condensate drain regularly at least once a year 10 4 Cleaning the condensate drain Check the condensate drain regularly f f Remove the evaporator cover see chapter Cleaning the evaporator fins f f Remove dirt and blockages immediately f f To test the drain pour one litre of water for example from two half litre bottles into the condensate pan ...

Page 47: ... new anode Alternatively you can also use a seg mented anode f f Push the plug of the anode cable back onto the anode f f Open the shut off valve in the cold water line f f Vent the DHW pipework at the respective DHW draw off points 10 7 Checking the diaphragm expansion vessels 1 26_04_01_0597_ 1 Fill valve of the expansion vessel f f Remove the protective caps from the fill valves on the expan si...

Page 48: ...22 22 c09 DHW circulation wall duct DHW circulation entry c12 Safety valve drain Diameter mm 19 19 d25 Solar flow Diameter mm 22 22 d26 Solar return Diameter mm 22 22 d45 Condensate drain Diameter mm 22 22 e01 Heating flow Diameter mm 22 22 e02 Heating return Diameter mm 22 22 g03 Outdoor air Diameter DN 315 410x155 DN 315 410x155 g04 Exhaust air Diameter DN 315 410x155 DN 315 410x155 g05 Extract ...

Page 49: ...s switch evaporator defrosting P1 High pressure transducer P2 Signal anode P3 Low pressure transducer P4 Pressure sensor heating water P5 Flow sensor heating S3 Reset button S4 Float switch bottom panel X1 Lower terminals X2 Upper terminals X3 Power supply X4 Terminal 3 way valve heating circuit 2 and solar circuit pump X5 Connection for external temperature sensors CAN BUS and PWM 0 10 V external...

Page 50: ...chronmotor WW Abtauventil Kühlen Mischer ZU Mischer AUF bl sw sw2 bl Z3 br bl M2 M L1 N L2 Pumpe HK2 12 7 M11 11 10 9 8 9 10 11 13 1415 zu M6 X35 1213 X30 X30 X32 2 9 kW 2 9 kW 2 9 kW E1 X3 X4 16 12 EVU 17 Schnelllüftung SL Fenster Auf FA 2 0 kW E2 11 21 14 11 9 8 EVU 2 gelb weiss weiss 3 4 X37 L1 L2 L3 Steuerung 4 1 br sw3 X40 F3 N1 12 22 X2 22 D0000052543 e Kühlen KUE Ofen Kamin O K ext Umschalt...

Page 51: ...Phase 2 Phase 3 Phase 4 Pumpe HK2 12 7 Wärme pumpen Lüfter Abluft Lüfter Zuluft Lüfter M11 X34 7 8 9 10 Ex Ventil Verdampfer Ex Ventil Heat Pipe grün schwarz gelb rot B15 U braun blau schwarz 14 11 5 9 8 13 4 2 M9 P2 M5 1 3 4 weiss rot schwarz gelb rot orange grau schwarz gelb rot orange grau 2 gelb weiss braun grün weiss gelb grün braun weiss weiss rot schwarz 1 2 3 4 1 3 4 4 5 3 Ub Klemme 6 7 8 ...

Page 52: ...PE 50Hz 400V 3 N PE 50Hz 400V 1 N PE 50Hz 230V L1 U V E PE 5 26_04_01_0600 3 2 1 4 Supply from low tariff electricity meter 5 1 Heat pump 2 Electric emergency booster heater 3 Fan control unit 4 Underfloor heating thermostat option or safety equipment terminal for oven fireplace 5 Time switch for power OFF periods Example 3 Blocking time for electric emergency booster heater and heat pump M L1 L2 ...

Page 53: ...rature 35 C 2 Flow temperature 35 C with heat recovery at 170 m3 h 3 Flow temperature 55 C 4 Flow temperature 55 C with heat recovery at 170 m3 h LWZ 404 SOL 0 1 2 3 4 5 6 7 8 9 10 11 20 15 10 5 0 5 10 15 20 25 30 1 2 3 4 D0000039890 X Outside temperature C Y Heating output kW 1 Flow temperature 35 C 2 Flow temperature 35 C with heat recovery at 200 m3 h 3 Flow temperature 55 C 4 Flow temperature ...

Page 54: ...50 84_04_01_0030 X Flow rate m3 h Y External pressure Pa A LWZ 304 404 SOL 1 Maximum flow rate LWZ 304 404 SOL 11 6 Pump curve Available external head 0 100 200 300 400 500 600 700 800 900 0 0 2 0 4 0 6 0 8 1 1 2 1 4 1 6 1 8 1 2 3 4 D0000039604 X Flow rate m3 h Y Pressure hPa 1 Pump rate 100 2 Pump rate 85 3 Pump rate 65 4 Pump rate 45 ...

Page 55: ...plication range limits X Outside temperature C Y Flow temperature C 11 8 Sensor resistance values The sensors integrated in the appliance the sensors supplied and the outside temperature sensor are PTC and PT 1000 sensors See chapter Specification Wiring diagram The collector sensor is a PT 1000 sensor PT 1000 sensor PTC sensor Temperature in C Resistance in Ω Resistance in Ω 30 862 20 922 1367 10...

Page 56: ...EN 12102 dB A 56 58 Application limits Min application limit heat source C 20 20 Max application limit heat source C 35 35 Max pressure drop outdoor air Pa 25 25 Min installation room volume m 12 12 DHW temperature with heat pump at A2 C 50 50 Water hardness dH 3 3 Conductivity softening μS cm 1000 1000 Conductivity desalination μS cm 20 100 20 100 Chloride mg l 30 30 Oxygen 8 12 weeks after filli...

Page 57: ... DN 22 DN 22 Solar circuit connection DN 22 DN 22 Condensate drain mm 22 22 Supply air extract air connection DN 160 DN 160 Outdoor air exhaust air connection mm 410x155 oval 410x155 oval Values Heat recovery level up to 90 90 Recommended max rated building heat load kW 7 5 9 Heating flow rate EN 14511 at A7 W35 B0 W35 and 5 K m h 0 9 1 3 Min heating flow rate m h 0 55 0 7 Supply air extract air f...

Page 58: ...58 LWZ 304 404 SOL www stiebel eltron com NOTES ...

Page 59: ...ENGLISH www stiebel eltron com LWZ 304 404 SOL 59 NOTES ...

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