STIEBEL ELTRON LWZ 70 E, Operation And Installation

Page 1: ...OPERATION AND INSTALLATION Central ventilation unit with heat recovery LWZ 70 E ...

Page 2: ...nstallation 10 10 1 Mounting the appliance 10 10 2 Connecting the condensate drain 11 10 3 Connecting air ducts 11 10 4 Power supply 12 11 Commissioning 12 11 1 Initial start up 12 11 2 Shutdown 12 11 3 Recommissioning 12 12 Settings 13 12 1 Settings menu 13 12 2 Read out menu 14 12 3 Service menu 15 12 4 Restoring factory settings 16 SPECIAL INFORMATION The appliance may be used by children aged ...

Page 3: ... data 1 4 1 Standard DIN EN 13141 7 The output data specifically mentioned in text diagrams and technical datasheets has been determined in line with the test conditions described in the standard shown in the heading of this chapter Generally these standardised test conditions will not fully meet the conditions found at the installation site of the system user Depending on the chosen test method a...

Page 4: ...e for load peaks e g as a party stage Frost protection On account of the high heat recovery level low outdoor tempera tures result in the extract air being cooled down so severely that any condensate that is created in the process may freeze Frost protection ensures that the extract air side of the heat exchanger cannot freeze Depending on the outdoor air temperature and the pressure drop at the h...

Page 5: ...lue switch appliance on or off from standard mode press and hold down for 5 seconds Scroll adjust value R One step back in the menu reset adjusted value filter reset press and hold down for 5 seconds delete fault history 4 3 Switching the appliance on 26_04_15_0009 f f Plug the appliance into a standard socket 26_04_15_0011 All display symbols are shown for two seconds 26_04_15_0029 The software v...

Page 6: ... air fans rotate according to stage 2 of the stage switch The air flow rate depends on the parameter 03 setting The supply air and extract air fans rotate according to stage 3 of the stage switch The air flow rate depends on the parameter 04 setting A number of appliances of this type have been connected The supply air and extract air fans rotate according to the fan stage selected at the master a...

Page 7: ...ate the appliance without filters Cleaning or replacing filters 5 s D0000041945 f f Press and hold down the minus button for 5 seconds to switch off the appliance f f Remove the filter flaps D0000041946 1 2 1 Extract air filter 2 Supply air filter f f Extract the supply air and extract air filters Make a note of how the filters were fitted 26_04_15_0015 f f Clean the filters e g with a vacuum clea...

Page 8: ...icted to the service menu The appliance remains in this fault condition until the problem has been resolved The appliance then resets itself auto reset and standard mode is displayed again 6 2 Fault code Non blocking fault D0000044923 If the appliance detects a non blocking fault code it continues to operate with limited functionality Non blocking faults are dis played with the fault symbol spanne...

Page 9: ...ystem and combustion equipment Alternate operation Operation on alternate sides means that when the combustion equipment is commissioned the mechanical ventilation system is switched off and or cannot be started Simultaneous operation WARNING INJURY To prevent any flue gas escaping into the installation room it is necessary to ensure that sufficient combustion air is supplied or that the negative ...

Page 10: ...with a minimum mass of 200 kg m2 is required A plaster board or metal framed wall is inadequate Additional measures such as a double skin or additional supports would be needed in such cases Ensure the equipment is level after installation The installation site must have an adequate condensate drain with stench trap and a fall for the condensate The installation site must be free from the risk of ...

Page 11: ...r is as low as possible When installing external wall ducts prevent any short circuit be tween the air intake and the air discharge Silencers Install a silencer in both the supply air and extract air ducts We recommend installing additional silencers if required to avoid sound transmission If a room with a high noise level must be ventilated install addi tional silencers upstream of this room to r...

Page 12: ...ia gram in chapter Specification Standard circuit 11 Commissioning 11 1 Initial start up Setting the air flow rate Output and energy consumption of the appliance depend on the pressure drop in the duct system and the resistance of the filters Fan stage Air flow rate m h 0 50 Moisture protection ventilation This fan stage prevents mould formation using the factory set air flow rate of 50 m h m h mu...

Page 13: ..._0064 Enabling the settings menu f f Press menu again to enable the settings menu D0000044922 Selecting parameters f f Use the plus or minus key to select the parameter you want to set D0000044924 1 2 1 Parameter number 2 Parameter value Parameter change f f Press menu D0000044926 f f The parameter value starts to flash D0000044929 f f Use plus or minus to change the parameter value Discarding a p...

Page 14: ...mbalance permissible 11 Fixed pressure imbalance m3 h 0 50 50 1 12 Preheating coil connected OFF ON Preheater coil connected OFF No preheater coil 13 29 no function 30 Humidity sensor OFF OFF Humidity sensor switched off ON Humidity sensor switched on 31 Humidity sensor sensitivity 0 2 sensitive to 2 least sensitive 12 2 Read out menu With the read out menu you can call up some values for more det...

Page 15: ... switch to the read out menu 26_04_15_0058 1 2 1 Fault message number 2 Fault code f f Press the menu button to enable the service menu You can use plus and minus to scroll through the read out menu Indication No fault message 26_04_15_0056 Current fault message fault symbol on the display For fault messages with a cause that has not yet been eliminated the fault symbol spanner appears 26_04_15_00...

Page 16: ...inal spare parts Maintenance by the qualified contractor includes the cleaning of the cross countercurrent heat exchanger and the fans Subject to runtime this maintenance work should be carried out every 3 years f f Switch off the appliance by pressing the minus key for 5 seconds f f Disconnect the power supply f f Remove the filter flaps f f Extract the filters Make a note of how the filters were...

Page 17: ...in the appliance to establish the correct position for the plug in connections f f Slide the insert with the control PCB into the appliance f f Install the display f f Reconnect all cables disconnected before cleaning to their original position f f Slide the heat exchanger back into the appliance f f Fit the front cover f f Insert the filters respectively with their clean sides facing towards the ...

Page 18: ...in The fault is reset auto matically E107 no The temper ature sensor for capturing the extract air temperature is faulty The bypass function is switched off Isolate the appliance from the power supply Replace the room temperature sensor E108 no If installed The tempera ture sensor in the external reheater coil is faulty The reheater coil if present is switched off The geothermal heat exchanger if ...

Page 19: ...125 168 248 600 45 145 560 79 75 213 77 77 213 302 g03 g04 g05 g06 d45 b01 D0000041882 LWZ 70 E b01 Entry electrical cables d45 Condensate drain Diameter mm 13 g03 Outdoor air Nominal diameter DN 125 g04 Exhaust air Nominal diameter DN 125 g05 Extract air Nominal diameter DN 125 g06 inrushing air Nominal diameter DN 125 ...

Page 20: ...V 0 2 3 LED FEZ 24 V P 0V 0 2 3 LED 12 10 4 11 5 FEQ 24 V P 0V 0 2 3 LED 6 4 2 5 1 3 Stufen Schalter 24 V P 0V 0 2 3 LED 3 2 1 D0000055737 3 Stufen Schalter 3 stage switch ZLWZ 4S 4 stage switch FEQ Air quality sensor FEZ Remote control Lüftungsgerät Ventilation unit Ofen Stove Raum Room Druckanschluss Pressure connection Schalter Kaminbetrieb Switch fireplace operation Differenzdruckcontroller fü...

Page 21: ... 3 2 1 A C B D E K M BN BN WH WH BN WH D0000041966 A 3 stage switch 4 stage switch air quality sensor FEQ or remote control FEZ see chapter Specification Standard circuit B External preheating coil optional C Outside temperature sensor D Room temperature sensor E Service connection K Wire no 1 M Wire no 2 ...

Page 22: ... 0 59 0 51 0 40 0 62 0 43 0 46 0 32 0 27 0 49 0 28 0 37 0 32 0 29 0 37 0 45 0 34 0 53 0 40 0 40 0 28 0 26 D0000056686 X Air flow rate m h Y Average value static pressure Pa 1 Example system curve with low pressure drop 2 Example system curve with average pressure drop 3 Example system curve with higher pressure drop x Specific power consumption of both fans Wh m ...

Page 23: ...ate m h 50 180 Heat recovery level up to 90 Extract air application range C 15 30 Max ambient temperature C 60 Available external pressure ventilation Pa 160 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 onl...

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