STIEBEL ELTRON LWA 252, Operation And Installation

Page 1: ...OPERATION AND INSTALLATION CENTRAL VENTILATION APPLIANCE LWA 252 LWA 252 SOL ...

Page 2: ...ons______________________________________13 7 2 Instructions standards and regulations______________________13 7 3 Ventilation system_________________________________________________13 8 Device description ____________________________________________ 14 8 1 Function _____________________________________________________________ 14 8 2 Design operation _______________________________________________...

Page 3: ...e commissioning of this appliance must only be carried out by qualified contractors Contractors are responsible for adherence to all currently applicable regulations during installation and commissioning Operate the appliance only when fully installed and with all safety equipment fitted Never adjust the ventilation and extract air valves inside the rooms These have been adjusted during commissionin...

Page 4: ...3 hours 3 2 2 Ventilation operation The appliance fan starts when the mains plug is inserted into the socket It cannot be switched off separately at the appliance 3 2 3 Operation outside the scope of applications Extract air temperature below 15 C Subject to the relative humidity and the flow rate the evaporator begins to build up hoar frost at an ambient temperature of below 15 C The appliance is ...

Page 5: ...and saving the required parameter changes by closing the control flap However if you want to make further changes turn the rotary selector until the display shows BACK then press This will return you to the previous level Closing the control flap with illuminated indicator above returns the manager to its original position The modified value will then not be saved Please read During commissioning a ...

Page 6: ...set holiday programs with the HOLIDAY parameter In the holiday program the heat pump system operates in setback mode You can extend the day mode by a few hours with the PARTY parameter In parameter TEMPERATURES you can scan the sensor temperatures of the ventilation and heat pump system comparing set with actual temperatures In parameter VENTILAT PROG you can adjust the times for the day and setba...

Page 7: ...rating mode is shown press PRG the operating mode is then set PRG PRG PRG PRG 24 12 18 6 24 12 18 6 24 12 18 6 24 12 18 6 24 12 18 6 PRG PRG PRG VENTILATION OPERATION MODE STANDBY AUTOMATIC DAY MODE SETBACK MODE party OPERATION MODE BACK 4 7 3 DHW temperature With parameter DHW TEMP you can allocate a set day and night temperature to the temperature inside the DHW cylinder DHW TEMP ACTUAL DHW T BA...

Page 8: ...s by what amount the collector temperature must be above the water temperature in the lower region of the cylinder to start the solar circuit pump If the water temperature in the lower region of the cylinder reaches the value selected under MAX SOLAR TEMP then the solar circuit pump starts PRG PRG SOLAR TEMP SOLAR DIFFEREN SOLAR DIFFEREN MAX SOLAR TEMP BACK MAX SOLAR TEMP 4 7 5 Time and date You c...

Page 9: ...fter the holiday period has expired the heat pump system operates again in accordance with the previous heating and DHW program You can extend the day mode by a few hours with the PARTY parameter Party mode is displayed when the flap is closed For example if the heating program would normally switch to setback mode at 22 00h and you have set party mode for 2 hours then setback mode would not start ...

Page 10: ...meter VENTILAT PROG you can set the times for VENTILATION You can adjust the VENTILATION as follows For each individual day of the week Monday Sunday Monday to Friday Mo Fr Saturday and Sunday Sa Su The whole week Mo Su You can adjust three switching time pairs I II III for each of these options Exception You will need two switching time pairs if you want to ventilate from 22 00h until 06 00h the ...

Page 11: ...2 00h until 06 00h the following day This determines when and how often the appliance should heat DHW You will already have selected the corresponding set values for day and night mode under the DHW TEMP system parameter Example You want to heat up DHW daily at two different times i e from 22 00h until 06 00h the following day and then again from 08 00h until 09 00h The day begins at 00 00h theref...

Page 12: ...ether a filter is blocked that may be incorporated The thermoswitch trips out or the safety pressure limiter switches the compressor OFF if the compressor is overloaded due to excessive ambient temperature excessive extract temperature 30 C or because of a fault in the refrigerant circuit The thermoswitch automatically switches itself ON again Risk of damage The safety pressure limiter must only be...

Page 13: ...DE 0100 Regulations for the installation of HV systems with rated voltages up to 1000V VDE 0701 Regulations regarding the repair modification and testing of used electrical equipment DIN EN 60335 part 2 40 Safety of electrical equipment for domestic use and similar purposes VDE 0298 4 Recommended values for the electrical capacity of cables and leads for fixed routing in and to buildings and of flexi...

Page 14: ...s designed for ventilation in apartments and detached houses as well as centralised DHW heating for several domestic draw off points Never Use extracted air loaded with grease explosive gases dust or adhesive aerosols Connect cooker hoods to the ventilation system Heat liquids other than potable water Never install the appliance Outside In rooms where there is a risk of frost In wet rooms such as ...

Page 15: ...andling To protect the appliance against damage it should be transported vertically inside its packaging Where space is restricted you may also move the equipment tipped backwards at an angle 10 1 1 Positioning Undo the four screws from the non returnable pallet Remove the washers Before removing the appliance from the pallet remove the anti vibration mounts from the pack supplied and insert into ...

Page 16: ...nsumption of the circulation pump reduce the efficiency of the system The cooled water in the circulation line mixes with the cylinder content Where possible avoid installing a circulation line Where that is not possible control the DHW circulation pump thermally or by time switch 10 3 Condensate drain For the condensate drain a hose is fitted to the defrost pan connector To ensure the condensate dr...

Page 17: ... panel with 6 self tapping screws Fit the appliance cover with 4 self tapping screws For anti vibration separation and service reasons connect the LWA to extract and discharge air ducts with about 1m length of flexible pipe each Also insulate these lines Risk of damage When operating a dryer or a cooker hood that extracts air ensure also that a sufficiently large air flow rate is supplied to that equ...

Page 18: ...er of the sensor enclosure Secure the sensor enclosure to the wall using the screw provided Route the sensor cable through the cable entry located on the upper edge of the back panel Connect the sensor lead to the outside temperature sensor Place the cover on the sensor enclosure so that it clicks audibly into place 10 6 2 Fitting the collector sensor The collector sensor is included in the separa...

Page 19: ... 60 1232 70 1271 80 1309 90 1347 100 1385 110 1423 120 1461 When measuring with a multimeter the resistance values serve only to identify faulty or incorrect sensors Measuring with a multimeter is too imprecise to test for accuracy 11 Commissioning Only approved contractors may commission this equipment and instruct the operator in its use Commission the system in accordance with these operating a...

Page 20: ...TRAST 5 DISPLAY OUTDOOR TEMP DAY DHW TEMP 6 EVAPOR MIN 7 DHW ONCE ON OFF 8 PASTEUR TEMP 9 PASTEURISATION 00 01 02 10 DHW HYSTERESIS 11 FLOW RATE STANDBY SETBACK STANDARD PARTY MINIMUM 12 FROST PROTECT BACK 13 NIGHT COOLING ON OFF 14 QUICK START 15 RELAY TEST SOLAR PUMP IMM HEATER 16 LCD TEST 17 LWM SOFTWARE 18 ANALYSIS 19 HP RESET ON OFF 20 RUNTIME COMP 21 STARTS COMP 22 RUNTIME POWER 23 STARTS PO...

Page 21: ...s closed You can select between outside room temperature return temperature day and time or DHW temperature 6 EVAPOR MIN Setting range 7 C to 3 C Standard settings 5 C The evaporator sensor should prevent the evaporator from freezing up during operation When this value has been met for at least 10 minutes the heat pump stops the fan runs at minimum air flow rate and the warm extract air defrosts th...

Page 22: ...f 60 C or the idle time of the heat pump running down would be two such limits 15 RELAY TEST Under this parameter pressing PRG and continuing to turn the rotary selector allows you to individually switch all LWA relays This way the correct wiring can be checked following installation Order of the switched relay outputs 01 Solar pump 02 Immersion heater 16 LCD TEST This function allows you to test ...

Page 23: ...eater OFF ON OFF 8 Pasteurisation temperature 60 C to 70 C 60 C 9 Pasteurisation 00 to 02 00 10 DHW hysteresis 2 C to 10 C 3 C 11 Flow rate Standby 0 10V 3V Setback ventilation 2 10V 3V Standard ventilation 2 10V 6V Party ventilation 2 10V 8V Minimum ventilation 2 10V 5V 12 Frost protection 10 C to 5 C 2 C 13 Night cooling OFF ON OFF 14 Quick start 15 Relay test OFF ON OFF 16 LCD test 17 LWM Softw...

Page 24: ...l wall free from snow and leaves 13 2 Cleaning Clean evaporator fins from time to time Regularly check the condenser drain and remove contamination and blockages 13 3 Safety equipment 13 3 1 Safety equipment fitted to the appliance In case of a fault the safety equipment interrupts the relevant power circuit Pull the power plug prior to commencing any work on the appliance High limit safety cut out ...

Page 25: ...e simultaneous inspection of the electrode the immersion heater and the internal enamel coating When replacing the anode ensure a perfect contact with a metallic conductive surface during assembly The timing of the inspection is subject to the local water quality and is determined by your local contractor 13 3 2 System safety equipment Safety valve on site provision This valve opens when the water...

Page 26: ...4 Minus1 PWM lin br br bl bl sw bl bl sw Drossel Z2 Z1 11 K7 3 2 1 N L PFC 1 X18 11 K3 1 3 3f L 3f N 8 5 12 21 22 3 K7 A B 12 1 2 26_04_01_0180 B2 DHW sensor top B3 DHW sensor bottom B4 Defrost sensor C1 Capacitor E1 Immersion heater F2 High limit safety cut out F3 Pressure switch HD F4 Klixon compressor H1 HP fault messages K1 Relay compressor K2 Immersion heater K3 Relay option K7 Relay HP indic...

Page 27: ...Voltage frequency V Hz 1 N PE 230 50 1 N PE 230 50 Protection to EN 60529 DIN VDE 0470 IP 20 IP 20 Heat pump Permissible operating pressure refrigerant circuit MPa 2 34 2 34 Refrigerant type R 134 a R 134 a Fill amount g 850 850 DHW Permissible operating pressure DHW MPa 0 6 0 6 Maximum DHW temperature via the heat pump C 60 60 Capacity DHW cylinder l 303 290 Ventilation Extract flow rate for vent...

Page 28: ...00 150 200 250 300 350 400 450 Volumenstrom m h 0 50 100 150 200 250 300 Externe Pressung Pa 6 6 6 6 6 6 6 6 6 Flow rate m3 h External pressure Pa 14 4 Setting air volume flow Example standard ventilation curve 3 50 0 0 50 100 m h m V 150 200 250 1 2 3 4 5 6 7 8 9 10 100 150 200 250 300 1 2 3 4 A 26_04_01_0471 ...

Page 29: ...194 376 558 1055 1264 1755 504 32 4 1 2 6 3 7 8 5 26_04_01_0252 9 10 1 Extract air connector 2 Discharge air connector optional installation 3 Cable entry for electrical cables 4 Condensate drain 5 DHW connection 6 DHW circulation connection 7 Flow indirect coil 8 Return indirect coil 9 Cold water inlet 10 Sensor well for collector or boiler sensor ...

Page 30: ...30 LWA 252 LWA 252 SOL WWW STIEBEL ELTRON COM GUARANTEE ENVIRONMENT AND RECYCLING ...

Page 31: ...ENGLISH WWW STIEBEL ELTRON COM LWA 252 LWA 252 SOL 31 NOTES ...

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