indoorcomfort–energysaving. … fan 2xw 421 wiring diagram no ... d i me nso kwl ec 200.. l ......

Tight building shellThe energy saving regulationEnEV 2009 intensifies the mini-mum requirements to the buil-ding energy efficiency, so thatthe building shell becomesincreasingly tight. The proof ofa ventilation concept accordingto DIN 1946-6 is unavoidable.For the development of theconcept Helios provides thesoftware KWLeasyPlan. Theprogram can be downloadedunder www.KWLeasyPlan.deand allows the layout of com-plete KWL® systems in confor-mity with DIN and the creationof bill of quantities.

KWL® ventilation systems forall applicationsWith air flow volumes from 60to 4000 m3/h the KWL®-unitsare suitable for central or localuse, for multi-storey buildings,one-family houses or commer-cial applications. There are unitswith high-efficient enthalpy,rotating and counter crossoverheat exchangers available. Thelater comes with electric – oralternatively hot water – heaterbattery for vertical, horizontal orhanging installation

PageKWL®-units with humidityand heat recovery 76

Wall installed unit with heatrecovery for single rooms 78

Compact units with EC technologyfor wall mounting 82 on

Central ventilation units, verticalor horizontal version 92 on

KWL® ventilation systems with heat recovery

74

KWL EC 60, the energy savingsolution in single rooms and tobring buildings up to modernstandards in the course ofrenovation. Page 78

KWL®-units with enthalpy exchan-ger for combined heat and humi-dity recovery.

Page 76 on

Ideal for passive house. Highestenergy efficiency, with constantair flow volume.

Page 84, 88

Indoor comfort – energy saving.In low energy and passive houses, multi-storeybuildings, commercial and industrial applications.

KWL® from Helios preservesthe energy savings achieved byinsulating measures. The unitsconstantly renew the air andheat recovery leads to a furtherimprovement of the energy effi-ciency. Even more important,KWL® from Helios creates ahealthy and comfortable climatein otherwise airtight and well-insulated buildings.

Extract Air: The used air spoi-led, with humidity, toxins andsmells is extracted from kit-chen, bathroom and toilet.The innovative Helios air extractelements AE.. allow a constant

or demand oriented air flowvolume – matched to theuser’s individual needs or roomdemands. The heat of theextracted air is retained by theexchanger and transferred tothe incoming fresh external air.

The outside air is feed throughbuilt-in heat exchanger of theunit and takes up the heatenergy from the extracted airwith efficiency up to 90%. Thisprocess can be further optimi-zed energetically, if an upstreamundersoil heat exchanger (lay-ing of duct in the soil) is added.Fresh, warmed air flows

through well-designed supplyair valves or air inlets into livingand bedrooms. Overflow ele-ments ensure air circulationwithin the property. The exhaustair is released outside passingthrough a roof or wall outlet.

KWL®-“Periphery“Versatile accessories, innovativeair ducting systems and under-soil heat exchangers completethe KWL®-units perfectly

Page 100 on

KWL® ventilation systems with heat recovery

Air extract and airsupply elements

KWL®-ventilation unitwith heat recovery

Flexible air ducting systemHelios FlexPipe®

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76

KWL®-ventilation units with enthalpy heat exchanger

Heat and humidity recoveryfor a comfortable climate.

KWL® units with combinedheat and humidity recoveryby enthalpy exchanger provi-de for a comfortable, healthyroom air climate, without ad-ditional energy consumptionand without use of anatmospheric humidifier.

Ideal room climate providesa healthy environmentIn living quarters the relativeroom humidity should lie bet-ween 30 – 60%. With too lowhumidity mucous membranesdry dust and electrostatic char-ge increase.These effects become appa-rent, in the cold season, if theoutside air has a high saturati-on level so that when warming,the relative air humidity decrea-ses inside the room. For exam-ple: With -5° outside tempera-ture and 21° inside the roomthe humidity of originally 100%drops to less than 17%.

In this range it becomes un-comfortable.

Ventilation units with enthalpyheat exchanger recover, in ad-dition to the heat, up to 65%of humidity from the extract air.This is used to warm the outsi-de air, which flows into theliving and reception rooms witha comfortable, healthy moistu-re content.

Ventilation units with enthalpyheat exchanger from Heliosachieve a total efficiency ofmore than 100%.

Operating mode of enthalpyheat exchangerThe water molecules of the ex-tracted room air condense oncontact with surfaces of the ent-halpy heat exchanger. They movethe water in a similar way toplants, through the membrane.At the membrane surface of thesupply airside the water molecu-les are absorbed by dry outsideair. A salt-crystalline layer on themembrane of the enthalpy heatexchanger guarantees the hygie-ne and efficiency with the humidi-ty transmission process. It ensu-res the water retains its molecularconfiguration to enter the supplyair flow. Extract and supply airflows are hermetically separatedfrom each other, so that an over-all transfer of organic particles orodors is excluded.

KWL® ventilation units with enthalpy heatexchanger: Highest efficiency, ideal interi-or air humidity and increase in comfort.

NEW!

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KWL®-ventilation units with enthalpy heat exchanger

Ventilation units with enth-alpy heat exchanger offerconvincing advantages:– Energy saving heat recoveryand humidity recovery in thecold season.

– Humidity recovery from theextract air up to 65%, de-pending on the interior airhumidity.

– Additional humidifiers areunnecessary.

Helios KWL® systems with ent-halpy combine the advantagesof heat recovery with those ofa healthy interior air humidity inan optimal way.The energy stored in the mole-cules help retain an improvedenergetic total balance of theheat recovery in comparisonto heat exchangers withoutenthalpy. Enthalpy heat ex-changers from Helios therebyachieve heat recovery efficien-cies of more than 100%.

Ventilation units with combined humidity and heat recoverywith highly efficient enthalpy exchanger. TÜV- certified heatrecovery efficiencies according to DIBt of up to 116%.Compact wall units for ventilation of houses and apartmentswith air flow rates of 200, 300 and 500 m³/h. Latest EC venti-lation technology for energy saving operation.

Including extensive control equipment:User-friendly 8-speed remote controller with LCD display forventilation regulation and optional connection of CO2- andhumidity sensor. Automatic bypass function for summeroperation. An electric pre-heater prevents the heat ex-changer from icing up.

KWL EC/ET 200 Pro R 200 m³/h Ref. No. 5895Technical details see KWL EC 200 Pro R page 82KWL EC/ET 300 Pro R 300 m³/h Ref. No. 5903Technical details see KWL EC 300 Pro R page 86

KWL EC/ET 500 Pro R 500 m³/h Ref. No. 5911Technical details see KWL EC 500 Pro R page 90

Ventilation units with combined humidity and heat recovery.Highly efficient enthalpy exchanger with heat recovery effi-ciency of more than 100%.Compact units for central ventilation of houses and apart-ments with air flow rates of 270 und 370 m³/h.Latest EC ventilation technology for energy saving operation.Innovative constant flow rate regulation for continuous capa-city, regardless of changing resistances.

Standard comfort equipment:Manufactured from high quality expanded polystyrene (EPS)for maximum heat insulation, fully automated frost protecti-on, bypass function for summer operation. Comfort controllerwith user-friendly menu navigation.

Enthalpy heat exchanger KWL-ET for additional changeoverof KWL EC.. ventilation units see pages 82 on.



The enthalpy exchanger program offers 5 units with different performance levels.

Compact units with 200, 300, 500 m³/h

Units with constant air flow volume

Noise protection DNE dB(A) 39-41

KWL EC 60

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NEW !NEW !

Wall installed unit KWL EC 60 with heat recovery and EC-technologyFor single rooms, with air flows up to approx. 60 m³/h

KWL EC 60 Eco Ref. No. 9950

Compact wall installed unit forsingle rooms.KWL EC 60 is the proven solutionfor comfortable indoor climateand energy saving in singlerooms. Ideal to bring existingbuildings up to modern stan-dards in the course of a renova-tion and to EnEV standard.KWL EC 60 supplies small andlarger single rooms. For a medi-um-sized flat the installation ofseveral units is recommended.

Installed in no time – ideal forrenovationKWL EC 60 is the optimal renova-tion solution, since a subsequentand time-consuming installation ofa ventilation system is no longer re-quired. The access to the outsideair is simply made by a core drillingin the outer wall in which the wallsleeve is inserted.This can be done simply during thefacade renovation. Two protectioncover plates close the openings.

The installation of the elegantlydesigned external facia which ismade from high grade-steel takesplace with the final plasteringworks. During the interior work theunit is inserted into the wall sleeveand connected electrically.Only the elegant facia is seen in-side the room. Therefore the KWLEC 60 blends in everywhere beau-tifully and the facia shields the viewof the fan interior completely. Alu-minium plate heat exchanger withefficiency of more than 70%.

Intelligent way of energy savingExpensive heating energy is savedwith KWL EC 60 and its efficientlarge heat transfer area aluminiumplate heat exchanger with efficiencyof more than 70%.

ECgreenVent® by HeliosEfficient energy-saving ventilationunits with EC-technology includingthe Helios KWL EC 60 are giventhe GreenTec label. KWL EC 60allows the demand ventilation withheat recovery of individual rooms;several units can be controlledindependently. Regulating is notnecessary.

Operating mode of theKWL EC 60 Ventilation withheat recoveryTwo high efficient fans with energy-saving EC-motors move the supplyand extract air. Smells and staleroom air are extracted outside,fresh and preheated air is suppliedinto the room. The heat of the ex-tracted air is recovered by the lar-ge heat transfer area aluminiumplate heat exchanger and transfer-red through the plates to the inco-ming fresh external air, so both airflows remain separated.

� Ordering and deliveryCoordinated with the assemblysteps the following elements arepacked separately and have tobe ordered individually:

�� First fix set, consisting of wallsleeve (length 349 mm), twoprotection cover plates andexternal facia made from high-grade steel.KWL 60 RS Ref. No. 0708

�� Ventilation unit, optionally inEco- or Pro- execution. Seedescription on the right.

� Similarities� Heat exchanger�� Large heat transfer area alumi-

nium plate heat exchanger withefficiency of more than 70%.

� FansTwo high efficient fans withenergy-saving EC-motors movethe supply and extract air withminimum power consumption.

� Condensation spigotCondensation is led directly tothe outside via the external facia.

� Air filter�� Two efficient air filters from micro

structured electrostatically char-ged material of the class G4 inthe supply and extract air streamguarantee the best air purity. Apollen filter (class F7) is availablefor the supply air as an accessory.

� KWL EC 60 EcoThe energy saving solutionwith favourable price /perfor-mance ratio for all applicati-ons.

�� Ventilation unit Eco, consistingof indoor facia from high qualitypolymer with integrated 3-speedcontroller.KWL EC 60 Eco Ref. No. 9950

� Speed controlThree-speed operation via con-troller, integrated in the indoorfacia (alternatively on top or be-low placeable by 180 ° rotationof the facia). Disconnection viaon/off switch on site.

� Electrical connectionVia screwless terminals.

Voltage/Frequency 230 V, 1 ph., 50 Hz

Nominal current A 0.05

Electrical connection NYM-J 3 x 1.5 mm²

Protection to IP X4

Sound level dB(A)Case breakout LPA in 3 m 30 22 18

Technical data

Air flow volume on speed step � � �Supply /Extract V· m3/h 60 30 17

Weight approx. kg 12

Power fan 2xW 4 2 1

Wiring diagram no. 949

Temperature operating range – 20 °C to + 40 °CElegant KWL EC 60 external faciamade of high-grade steel.

Noise protection DNE dB(A) 39-41

79

Heat recovery

Wall installed unit KWL EC 60 with heat recovery and EC technologyFor single rooms, with air flows up to approx. 60 m³/h

��

��

�

��

��

��

��

Dimensions in mm

KWL EC 60 Pro Ref. No. 9951Incl. humidity KWL EC 60 Pro FF Ref. No. 9957

KWL EC 60 Pro / Pro FFFulfils even highest demandsin comfort, with many usefulfunctions.

�� Ventilation unit Pro, consistingof indoor facia from high qualitypolymer and comfort controller(KWL-BCU, 1 pc. incl. in deli-very). See details on the right.KWL EC 60 Pro No. 9951

�� Ventilation unit Pro FF, like KWL EC 60 Pro, however withadditional integrated humiditysensor for ventilation as nee-ded. Adjustable humidity level.KWL EC 60 Pro FF No. 9957

� Power controlThe comfort controller withgraphic display and user-friendlymenu navigation (included indelivery) makes the followingfunctions possible:

– Four-speed manual operation orwith digital timer.

– Control via intelligent CO2- andhumidity sensors (accessories,in each case up to 4 controllerscan be installed).


Nominal current A 0.06

Electric supply NYM-J 3 x 1.5 mm²

Protection to IP X4

Sound level dB(A)Case breakout LPA in 3 m 30 29 22 18

Technical data

Air flow volume on speed step � � � �Supply /Extract V· m3/h 60 45 30 17

Weight approx. kg 12.5

Power fan 2xW 4 3 2 1

Wiring diagram no. 950

Temperature operating range – 20 °C to + 40 °C

– Supply/extract air operationseparately adjustable.

– Boost ventilation, intensive venti-lation.

– Display of required filter change,operating state, operating hours,error messages.

�� Several units can be controlledwith one comfort controller.

�� Several comfort controllers canbe connected to one unit.

� ShuttersTwo shutters seal airtight to theoutside when the unit is off (holi-day or downtimes), one shutterseals individually with supply orextract air operation.

� Electrical connectionVia plug-in connector (incl. indelivery).

core hole Ø 352 mm

� Similar accessories

Extension sleeve length 111 mm,can be shortened to any length,with partition element. For wallthickness > 349 mm.KWL 60 WV Ref. No. 0884

A compensation ring from high-grade steel (w/o fig.) for the out-side wall is available for wall thick-ness < 350 mm.KWL 60 DR Ref. No. 0888

� Ordering and delivery Coordinated with the assemblysteps the following elements arepacked separately and have tobe ordered individually:

�� First fix set,as described on the left page.KWL 60 RS No. 0708

�� Ventilation unit, optionally in Eco- or Pro- execution. See description on the below.

� Accessories for Pro..Comfort controller (additional)Display and function as describedon the left. One piece KWL-BCUincluded in delivery. Up to 4 control-lers can be connected. 3 m con-necting cable included in delivery. Dim. mm (WxHxD) for flush moun-ting 81 x 81 x 20KWL-BCU No. 9955Dim. mm (WxHxD) for surfacemounting 84 x 84 x 20KWL-BCA No. 9956

CO2-sensorMeasures CO2 concentration andtransfers data to the ventilation unitto arrange for an optimal CO2 levelin all 4 speeds. Up to 4 sensorscan be plugged in. In this case, thesensor with the highest measure-ment is used for setting the unit.Dim. mm (WxHxD) 95 x 97 x 30KWL-CO2 Ref. No. 9958

Connecting cableFor distances > 3 m, with 2 RJ 12plugs. For connection betweencontroller and KWL EC 60 Pro..and/or between several ventilationunits.KWL-AL 10 (length 10 m) No. 9444KWL-AL 20 (length 20 m) No. 9959

� Additional accessories pg.Spare filter 113

Wye junction boardTo connect units, controllers andaccessory components.KWL-ALA Ref. No. 9960

82

Compact units with heat recovery and EC-technology for wall mounting for air flow rates up to approx. 250 m3/h

KWL EC 200 Eco and KWL EC 200 Pro

(Photo shows KWL EC 200 Pro R with pollen filter class F7 (acessory))

Dimensions in mm

Dimensions in mm

KWL EC 200.. L

KWL EC 200.. R

Compact unit with heat recoveryfor central ventilation of housesand apartments.

High efficient counter crossoverheat exchanger with efficiencyof up to 90%. State-of-the-artEC-motor technology for ex-tremly low power consumption.

� Similarities� Casing�� Made from galvanised steel,white powder coated, doublewalled, heat and noise insulated(12 mm) on all sides.

�� Easy to install and maintain. The removable front panel allowsfull access.

� Heat ExchangerDue to its large surface area theexchanger provides an except io-nally high efficiency. Made fromaluminium to ensure durabilityand high quality. Easy to removefor cleaning purposes.

� FansTwo silent and energy saving centrifugal fans with energysaving EC-motors move thesupply air and extract air.They are maintenance free andeasy to remove for cleaning.

� DuctingR or L handing ensures easyand crossover-free connectionof the ducting for supply andextract air using ducts withnominal diameter of 125 mm.Spigots for connection locatedon top of the unit.

� Condensation outletThe condensation outlet is locatedat the bottom of the unit. Trapdelivered as standard. To beconnected to the drain pipe byinstaller.

KWL EC 200 Pro meets even thehighest comfort requirements.Equipped with an electric pre-heater, F7 pollen filter and anautomatic bypass function asstandard. An easy-to-use LCDcontroller is included.

Special features ofKWL EC 200 Pro� Air filter �� Supply of cleaned outside airusing a G4 filter. Superfine pol-len filter (filter class F7) is alsoavailable. Extract air passes aG4 filter before entering the heatexchanger. All filters are easy to clean andreplace.

� Frost protection/pre-heater�� KWL EC 200 Pro units deliveredas standard with an electric pre-heater which heats the intake airwhen the temperature is too low.This prevents ice from buildingup in the heat exchanger andensures optimal heat recoveryeven during the winter months. Adjustable from –6 to +15 °C.

� Speed control– Automatic control of ventilationoperation via LCD controllerwhich is delivered as standard.Additional controllers (up to 3)and intelligent sensors (up to 5CO2 and 2 humidity sensors)can be connected.

– 8 speed steps for ideal ventilationand on/off via one or more re-mote controllers.

– Ventilation can be controlled viaEIB or LON BMS (accessory) orvia the external voltage signal (0-10 V or 4-20 mA).

�� LCD controller– Programming of basic and max. ventilation level as well ashumidity and CO2-limits, etc.

– LCD-Display for temperature,maintenance and menu.

– Optical filter display with adjustable time period.

– Maximum ventilation functionor open fire function via switch(switch has to be provided bycustomers). This prevents draw-ing smoke into the room fromopen fires.

– Integrated digital week timer.– Adjustable speed proportionof the supply air and extractair fans.

– Settings for frost protection.– Settings for summer operation.

� Summer operationComes with automatic bypassfunction as standard. If summerfunction is selected on the con-troller – according to the definedsettings – the heat exchanger isbypassed.

� Electrical connectionDelivered ready to plug in. Easily accessible external terminal boxwith connections for further LCDcontrollers, sensors etc. The sup-plied LCD controller is alreadyconnected.

KWL EC 200 EcoThe economical solution for awide range of application withan excellent cost/performanceratio.

� Air filter�� Supply of cleaned outside airusing a G4 filter. Superfine pol-len filter (filter class F7) is alsoavailable. Extract air passesthrough a G4 filter before ente-ring the heat exchanger.

� Frost protection�� An adjustable thermostat stopsthe supply air in case of frost toprevent the heat exchanger fromicing up.

� Speed control�� The speed control supplied, hasa 4-step operation switch whichcan be mounted at a distanceup to 100 m. Power levels canbe chosen from 5 speeds according to the air flow volume(see diagram).

�� The operation switch can becombined with a clock timer,available as accessory.WSUP Ref. No. 9990

�� Combined with the differentialpressure switch (accessory) thecondition of the filter is displayedwith a red LED.DDS Ref. No. 0445

� Summer operationThe unit comes with a manuallyoperated bypass function asstandard. In this case the outsideair goes through the KWL with-out passing the heat exchangerto prevent the heat recoveryfunction.

� Electrical connectionDelivered ready to plug in. Freeaccessible and external terminalbox with connections for operationswitch and clock timer.

� Other accessories PagesKWL®-“Periphery“ 100 on – Undersoil heat exchangers 102 on

– Air distribution systems 106 on – Insulated duct system 111– Further overview 112 – Spare filters 113

Accessories-DetailsGrilles, ducting, ductcomponents, wall and roof terminations 361 on Intake/extract elements 374 on

Supply Extract

IntakeExhaust

Condensation outlet

Supply Extract

IntakeExhaust

Condensation outlet

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� Accessories KWL EC 200 Eco

Clock timer Digital clock timer with LCD-dis-play to control operation automati-cally. Clock timer adjustable foreach day of the week. Suitable forflush and surface installation. Dim. in mm (WxHxD) 85 x 85 x 52WSUP Ref. No. 9990

Differential pressure switchAdjustable pressure switch to indicate when the pressure acrossthe filter exceeds set pressure. Adjustable set pressure. Deliveredas a complete set.DDS Ref. No. 0445


Max. Amps – ventilation 0.7

– max. total 5.1

Electric pre-heater kW 1.0

– pre-heater 4.4

Sound levels in dB(A)Supply LWA (sound power level) 44 40 37 34 31 29 28 27Extract LWA (sound power level) 44 39 36 33 31 30 28 28Case breakout LPA in 1 m 40 35 32 29 26 23 21 20

Right-hand version KWL EC 200 Pro R Ref. No. 0947Left-hand version KWL EC 200 Pro L Ref. No. 0950

Technical Data KWL EC 200 Pro for wall mounting

Air flow volume on speed step � � � � �Supply-/Extract air flow vol. V.

.m3/h 285 235 200 160 130 105 80 55

Power fan 2 x W 49 31 21 16 11 9 7 5

Weight approx. in kg 41

Temperature operation range – 20 °C to + 40 °C

Sommer Bypass Auto., adjustable from, with heat exchanger cover

Wiring Diagram no. 817


Nominal power max. Amps 0.7

Sound levels in dB(A)Supply LWA (sound power level) 44 40 37 31 28Extract LWA (sound power level) 44 39 36 31 28Case breakout LPA in 1 m 40 35 32 26 21

Right-hand version KWL EC 200 Eco R Ref. No. 0945Left-hand version KWL EC 200 Eco L Ref. No. 0946

Technical Data KWL EC 200 Eco for wall mounting

Air flow volume on speed step � � �Supply-/Extract air flow vol. V.

.m3/h 285 235 200 130 80

Power fan 2 x W 49 31 21 11 7



Summer Bypass manually, with heat exchanger cover

Wiring Diagram no. 857.1

� Accessories KWL EC 200 Pro

Controller (additional)User friendly LCD controller; details see “speed control“ on theleft page. One controller included.Additional ones can be ordered separately. Up to three controllerscan be installed.Dim. mm (WxHxD) 90 x 107 x 21KWL-FB Ref. No. 9417

CO2-sensorMeasures CO2 concentration andtransfers data to the ventilation unitto arrange for an optimal CO2 level.Up to five sensors can be pluggedin. In this case, the sensor with thehighest measurement is used forsetting the unit.Dim. mm (WxHxD) 81 x 130 x 32KWL-KDF Ref. No. 9413

Humidity sensorMeasures the relative humidity.The limit can be set automaticallyor manually. Up to two sensorscan be plugged in.Dim. mm (WxHxD) 81 x 130 x 32KWL-FF Ref. No. 9414

BMS-modulesAllow the connection of KWL EC200 to a LON or EIB-BMS-Net-work to control it from a centralstation and check its data.Dim mm (WxHxD) 120 x 158 x 75EIB-BMS-moduleKWL-EB Ref. No. 9416LON-BMS-moduleKWL-LB Ref. No. 9415

KWL EC 200 Eco and KWL EC 200 ProTechnical data

V· m3/h

∆pstat.Pa

KWL EC 200 Eco KWL EC 200 Pro

Frequency Hz Total 125 250 500 1k 2k 4k 8k LWA Extract dB(A) 44 38 39 37 37 32 26 22LWA Supply dB(A) 44 32 35 40 38 35 29 22LPA Exhaust dB(A) 40 33 33 32 34 31 21 18

� – �

� – �KWL EC 200 Eco

KWL EC 200 Pro

� NoteVentilation units with enthalpy heat exchangerfor combined heat and humidity recovery page 76 Enthalpy heat exchanger (accessories) for additional refittingKWL-ET 200 Ref. No. 0896

84

Passive-house compact unit heat recovery, EC technology, constant airflow regulation. Air flow rates up to approx. 270 m3/h



Sound levels dB(A) at 100 Pa *Supply LWA (sound power level) 63 52 46Extract LWA (sound power level) 49 38 32Case breakout LPA in 1 m 43 32 27

Air flow volume on speed step** �Supply-/Extract air flow vol. V.

.m3/h 285 170 110

Power fan 2 x W 68 19 10






Dimensions in mm

Dimensions in mm

KWL EC 270.. L

KWL EC 270.. R

Compact unit with heat recoveryfor central ventilation of housesand apartments built upon pas-sive-house standards.High efficient cross counterflowheat exchanger with an efficien-cy of more than 90%. Latest ECmotor technology with constantair flow regulation. This ensuresthat the adjusted air flow rate ispreserved regardless of chang-ing resistances (e.g., dirty filters)on each operating level.

� Similarities� Casing�� Made from galvanised sheetsteel, white powder coated.

�� Interior from high quality expan-ded polystyrene (EPS) for maxi-mum heat insulation.

�� Easy to install and maintain. Theremovable front panel allows fullaccess.

� Heat exchangerDue to its larger surface thecross counterflow heat ex-changer provides an exceptio-nally high efficiency. Made frompolymer. Easy to remove forcleaning purposes.

� FansTwo silent high efficient centrifu-gal fans with energy-saving ECmotors and constant flow rateregulation move the supply airand extract air continuously alsoon change of the pressure in thesystem. They are maintenancefree and easily accessiblethrough the front.


� Condensation outletThe condensation outlet is loca-ted at the bottom of the unit.Trap and drain pipe to be con-nected by installer.

� Air filterSupply of cleaned outside airusing a G4 filter. Superfine pol-len filter F7 (always necessaryfor passive-houses) is also avai-lable. Extract air passes througha G4 filter before entering theheat exchanger. A G4 bypassfilter is included as standard,optional F7.

� Frost protectionBy reduction of the supply airflow rate or by the integratedregulation of an upstream pre-heater battery (accessories)EHR-R 1,2/160 No. 9434

An air filter is to be pre-con-nected to the pre-heater batteryin G4 execution (accessories).LFBR 160 G4 No. 8578

� Electrical connectionFree accessible, external termi-nal box (IP 44) at implementedcable, approx. 1.5 m long.

NEW !NEW !




� Speed control�� Three speed operation viacontroller, integrated in thefront panel.

�� Three freely definable operatinglevels individually controllable viapotentiometers. Adjustablespeed ratio of supply/extract air.

�� Disconnection via on/off switchon site or potentiometer adjust-ment.

�� An LED signals operating condi-tion, filter change, frost protecti-on, supply air temperature lowerthan 5° C and error message.

�� Activation of intensive ventilationlevel by additional externalswitch on site.

� Summer operationUsing exchanger cover plate, adjustable switching tempe-rature and can be deactivated.

Pre-heating battery (Output) kW 1.0

* Sound levels raise with increasing system pressure ** Speed steeps adjustable at will.

Standby-losses < 1 W

Supply Extract

IntakeExhaust

Condensation outlet

Intake Exhaust

Supply Extract

Condensation outlet

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KWL EC 270 Eco and KWL EC 270 ProTechnical Data

� Accessories for Pro..Comfort controller (additional)

Display and function as describedon the left. One piece KWL-BCUincluded in delivery. Up to 4controllers can be connected. 3 mconnecting cable included in deli-very. Dim. mm (W x H x D) for flushmounting 81 x 81 x 20KWL-BCU No. 9955Dim. mm (W x H x D) for surfacemounting 84x84x20KWL-BCA No. 9956

CO2-sensorMeasures CO2 concentration andtransfers data to the ventilation unitto arrange for an optimal CO2 levelin all 4 speeds. Up to 4 sensorscan be plugged in. In this case, thesensor with the highest measure-ment is used for setting the unit.Dim. mm (W x H x D) 95 x 97 x 30KWL-CO2 Ref. No. 9958

Humidity sensorMeasures the relative humidity andtransfers data to the ventilation unitto arrange for optimal interior airhumidity in all 4 speeds. Up to 4sensors can be plugged in. In thiscase, the sensor with the highestmeasurement is used for settingthe unit.Dim. mm (W x H x D) 95 x 97 x 30KWL-FF 270 Ref. No. 9953

Connecting cableFor distances > 3 m, with 2 RJ 12plugs. For connection betweencontroller and KWL EC.. Pro and/orbetween several ventilation units.KWL-AL 10 (length 10 m) No. 9444KWL-AL 20 (length 20 m) No. 9959


KWL EC 270 ProMeets even the highest comfortdemands in functionality andoperator convenience. Fullyautomated control, power-controlled electric heater battery(accessories) and automaticbypass function. User-friendlyremote controller with graphicdisplay included.

� Speed control�� The comfort controller with gra-phic display (included in delivery)and user-friendly menu navigati-on makes the following functi-ons possible:


– Freely definable operating levelswithin the performance curvevalues

– Boost ventilation, intensive venti-lation in addition also with exter-nal switch

V· m3/h

∆pstat.Pa

Frequency* Hz Total 125 250 500 1k 2k 4k 8k LWA Extract dB(A) 49 29 43 46 36 38 33 22LWA Supply dB(A) 63 49 56 59 57 54 48 41LPA Exhaust dB(A) 43 30 35 41 36 33 29 25

KWL EC 270..



Sound levels dB(A) at 100 Pa *Supply LWA (sound power level) 63 58 52 46Extract LWA (sound power level) 49 43 38 32Case breakout LPA in 1 m 43 39 32 27

Air flow volume on speed step** � �Supply-/Extract air flow vol. V.

.m3/h 285 230 170 110

Power fan 2 x W 68 35 19 10







� NotesVentilation units with enthalpy heat exchangerfor combined heat and humidity recovery page 76

Enthalpy heat exchanger(accessories) for additionalrefittingKWL-ET 270 Ref. No. 5912

– Control via intelligent CO2- andhumidity sensors (accessories,in each case up to 4 controllerscan be installed)




�� The supply air temperature canbe warmed up additionally byregulation of a power-controlled,external heater battery (EHR-R,accessories). Duct sensor (LTK40, Ref. No. 1324) necessary.EHR-R 2,4/160 No. 9435

� Summer operationUsing exchanger cover plate,adjustable switching temperatu-re and can be deactivated viacontroller.




Pre-heating battery (Output) kW 1.0

Heating battery (Output) kW 2.0


Recommended:Basic ventilation systems Rated ventilation area Intensive-ventilation area


* see technical details

86


(Figure: KWL EC 300 Pro R)

Dimensions in mm

Dimensions in mm

KWL EC 300.. L

KWL EC 300.. R



High efficient counter crossoverheat exchanger with efficiencyof up to 90%. State-of-the-artEC-motor technology.

� Similarities� Casing�� Made from galvanised steel,white powder coated, doublewalled, heat and noise insulated(12 mm) on all sides.

�� Easy to install and maintain. The removable front panel allowsfull access.

� Heat ExchangerDue to its large surface of 12 m²the exchanger providesexcept ionally high efficiency. Made from aluminium to ensuredurability and high quality. Easyto remove for cleaning purposes.

� FansTwo silent and energy saving centrifugal fans, with energysaving EC-motors, move thesupply air and extract air.They are maintenance free andeasy to remove for cleaning.

� DuctingR or L handing ensures easyand crossover-free connectionof the ducting for supply and ex-tract air using ducts with nomi-nal diameter of 125 mm. Spigotsfor connection located on top ofthe unit.


KWL EC 300 Pro meets even thehighest comfort requirements.Equipped with an electric pre-heater, F7 pollen filter and anautomatic bypass function asstandard. An easy-to-use LCDcontroller is included.

Special features ofKWL EC 300 Pro� Air filter �� Supply of cleaned air withdouble-filtering: Prefilter G4 andpollen filter F7. The extract airpasses through filter G4 beforeentering the heat exchanger. Allfilters areeasy to clean and re-place.

� Frost protection/pre-heater�� KWL EC 300 Pro units deliveredas standard with an electric pre-heater which heats the intake airwhen the temperature is too low.This prevents ice from buildingup in the heat exchanger andensures optimal heat recoveryeven during the winter months. Adjustable from –6 to +15 °C.

� Speed control– Automatic control of ventilationoperation via LCD controllerwhich is delivered as standard.Additional controllers (up to 3)and intelligent sensors (up to 5CO2 and 2 humidity sensors)can be connected.

– 8 speed steps for ideal ventilationand on/off via one or more remote controllers.


�� LCD controller– Programming of basic and maximum ventilation level aswell as humidity and CO2-limits,etc.

– LCD-Display for temperature,

maintenance and menu.– Optical filter display with adjustable time period.

– Maximum ventilation functionor open fire function via switch(switch has to be provided bycustomers). This prevents draw-ing smoke into the room fromopen fires.

– Integrated digital week timer.– Adjustable speed proportionof the supply air and extractair fans.


� Summer operationComes with automatic bypassfunction as standard. If summerfunction is selected on the con-troller – according to the definedsettings – the heat exchanger isbypassed

� Electrical connectionDelivered ready to plug in. Easily accessible external terminal boxwith connections for further LCDcontrollers, sensors etc. The sup-plied LCD controller is alreadyconnected.


� Air filter�� Supply of cleaned outside airusing a G4 filter. Superfine pol-len filter (filter class F7) is alsoavailable. Extract air passesthrough a G4 filter before entering the heat exchanger.


� Speed control�� The speed control supplied, hasa 4-step operation switch whichcan be mounted at a distanceup to 100 m. Power levels canbe chosen from 5 speeds according to the air flow volume(see diagram).



� Summer operationThe unit comes with a manuallyoperated bypass function asstandard. In this case the outsideair goes through the KWL with-out passing the heat exchangerto prevent the heat recoveryfunction.





Supply Extract

IntakeExhaust

Condensation outlet

Supply Extract

IntakeExhaust

Condensation outlet

8787

Heat reco

very




� Accessories KWL EC 300 Pro

Controller (additional)User friendly LCD controller; details see “speed control“ on theleft page. One controller included.Additional ones can be ordered separately. Up to three controllerscan be installed.Dim. mm (WxHxD) 90 x 107 x 21KWL-FB Ref. No. 9417



BMS-modulesAllow the connection of KWL EC200 to a LON or EIB-BMS-Net-work to control it from a centralstation and check its data.Dim mm (WxHxD) 120 x 158 x 75EIB-BMS-moduleKWL-EB Ref. No. 9416LON-BMS-moduleKWL-LB Ref. No. 9415




� – �KWL EC 300 Pro


V· m3/h

∆pstat.Pa




– max. total 5.7


– pre-heater 4.4

Sound levels in dB(A)Supply LWA (sound power level) 49 47 44 42 40 37 35 32Extract LWA (sound power level) 49 47 45 42 40 37 35 33Case breakout LPA in 1 m 46 44 42 39 37 33 30 26




.m3/h 360 335 305 270 240 195 165 105

Power fan 2 x W 97 80 65 46 36 25 18 10







Sound levels in dB(A)Supply LWA (sound power level) 49 47 44 40 35Extract LWA (sound power level) 49 47 45 40 35Case breakout LPA in 1 m 46 44 42 37 30




.m3/h 360 335 305 240 165

Power fan 2 x W 97 80 65 36 18





88

Passive-house compact unit heat recovery, EC technology, constant airflow regulation. Air flow rates up to approx. 370 m3/h

KWL EC 370 Eco and KWL EC 370 Pro NEW !NEW !



Sound levels dB(A) at 100 Pa *Supply LWA (sound power level) 71 58 52Extract LWA (sound power level) 56 44 37Case breakout LPA in 1 m 51 41 34

Air flow volume on speed step** �Supply-/Extract air flow vol. V.

.m3/h 350 200 140

Power fan 2 x W 111 25 14







Pre-heating battery (output) kW 1.0


Compact unit with heat recoveryfor central ventilation of housesand apartments built upon pas-sive-house standards.High efficient cross counterflowheat exchanger with an efficiencyof more than 90%. Latest ECmotor technology with constantair flow regulation. This ensuresthat the adjusted air flow rate ispreserved regardless of changingresistances (e.g., dirty filters) oneach operating level.

� Similarities� Casing�� Made from galvanised sheetsteel, white powder coated.

�� Interior from high quality expan-ded polystyrene (EPS) for maxi-mum heat insulation.

�� Easy to install and maintain.The removable front panel al-lows full access.

� Heat exchangerDue to its larger surface areathe cross counterflow heat ex-changer provides exceptionallyhigh efficiency. Made from poly-mer. Easy to remove for cleaningpurposes.

� FansTwo silent high efficient centrifu-gal fans, with energy-saving ECmotors and constant flow rateregulation, move the supply airand extract air continuously alsoon change of the pressure in thesystem. They are maintenancefree and easily accessiblethrough the front.


� Condensation outletThe condensation outlet is loca-ted at the bottom of the unit.Trap and drain pipe to be con-nected by installer.

� Air filterSupply of cleaned outside airusing a G4 filter. Superfine pol-len filter F7 (always necessary forpassive-houses) is available asan accessory. Extract air passesthrough a G4 filter before ente-ring the heat exchanger. A G4bypass filter is included as stan-dard, optional F7.

� Frost protectionBy reduction of the supply airflow rate or by the integratedregulation of an upstream pre-heater battery (accessories)EHR-R 1,2/160 No. 9434

An air filter is to be pre-con-nected to the pre-heater batteryin G4 execution (accessories).LFBR 160 G4 No. 8578

� Electrical connectionFree accessible, external terminalbox (IP 44) at implemented cable,approx. 1.5 m long.


� Speed control�� Three speed operation viacontroller, integrated in thefront panel.

�� Three freely definable operatinglevels individually controllable viapotentiometers. Adjustablespeed ratio of supply/extract air.

�� Disconnection via on/off switchon site or potentiometer adjust-ment.

�� A LED signals operating conditi-on, filter change, frost protecti-on, supply air temperature lowerthan 5° C and error message.

�� Activation of intensive ventilationlevel by additional externalswitch on site.

� Summer operationUsing exchanger cover plate, adjustable switching tempe-rature and can be deactivated.


Dimensions in mm

Dimensions in mm

KWL EC 370.. L

KWL EC 370.. R

Supply Extract

IntakeExhaust

Condensation outlet

Intake Exhaust

Supply Extract

Condensation outlet

89

Heat reco

very


V· m3/h

∆pstat.Pa

Frequency* Hz Total 125 250 500 1k 2k 4k 8k LWA Extract dB(A) 56 41 53 52 38 40 33 23LWA Supply dB(A) 70 60 64 66 63 64 59 53LPA Exhaust dB(A) 51 43 44 44 44 43 39 34

KWL EC 370..



Sound levels dB(A) at 100 Pa *Supply LWA (sound power level) 71 64 58 52Extract LWA (sound power level) 56 50 44 37Case breakout LPA in 1 m 51 46 41 34

Air flow volume on speed step** � �Supply-/Extract air flow vol. V.

.m3/h 350 280 200 140

Power fan 2 x W 111 62 25 14







Pre-heating battery (output) kW 1.0

Heating battery (output) kW 2.0


� Accessories for Pro..Comfort controller (additional)

Display and function as describedon the left. One piece KWL-BCUincluded in delivery. Up to 4controllers can be connected. 3 mconnecting cable included in deli-very. Dim. mm (W x H x D) for flushmounting 81 x 81 x 20KWL-BCU No. 9955Dim. mm (W x H x D) for surfacemounting 84 x 84 x 20KWL-BCA No. 9956

CO2-sensorMeasures CO2 concentration andtransfers data to the ventilation unitto arrange for an optimal CO2 levelin all 4 speeds. Up to 4 sensorscan be plugged in. In this case, thesensor with the highest measure-ment is used for setting the unit.Dim. mm (W x H x D) 95 x 97 x 30KWL-CO2 Ref. No. 9958

Humidity sensorMeasures the relative humidity andtransfers data to the ventilation unitto arrange for optimal interior airhumidity in all 4 speeds. Up to 4sensors can be plugged in. In thiscase, the sensor with the highestmeasurement is used for settingthe unit.Dim. mm (W x H x D) 95 x 97 x 30KWL-FF 270 Ref. No. 9953

Connecting cableFor distances > 3 m, with 2 RJ 12plugs. For connection betweencontroller and KWL EC.. Pro and/orbetween several ventilation units.KWL-AL 10 (length 10 m) No. 9444KWL-AL 20 (length 20 m) No. 9959


KWL EC 370 ProMeets even the highest comfortdemands in functionality andoperator convenience. Fullyautomated control, power-con-trolled electric heater battery(accessories) and automaticbypass function. User-friendlyremote controller with graphicdisplay included.

� Speed control�� The comfort controller with gra-phic display (included in delivery)and user-friendly menu navigati-on makes the following functi-ons possible:


– Freely definable operating levelswithin the performance curvevalues

– Boost ventilation, intensive venti-lation in addition also with exter-nal switch

– Control via intelligent CO2- andhumidity sensors (accessories,in each case up to 4 controllerscan be installed)




�� The supply air temperature canbe warmed up additionally byregulation of a power-controlled,external heater battery (EHR-R,accessories). Duct sensor (LTK40, Ref. No. 1324) necessary.EHR-R 2,4/160 No. 9435

� Summer operationUsing exchanger cover plate,adjustable switching temperatureand can be deactivated via con-troller.




Recommended:Basic ventilation systems Rated ventilation area Intensive-ventilation area

* see technical details


� NotesVentilation units with enthalpy heat exchangerfor combined heat and humidity recovery page 76

Enthalpy heat exchanger(accessories) for additionalrefittingKWL-ET 370 Ref. No. 5912

90


Photo shows KWL EC 500 Pro R with pollen filter class F7 (acessory)

Dimensions in mm

Dimensions in mm

KWL EC 500.. L

KWL EC 500.. R



High efficient counter crossoverheat exchanger with efficiencyof up to 90%. State-of-the-artEC-motor technology.

� Similarities� Casing�� Made from galvanised steel, white powder coated, doublewalled, heat and noise insulatedon all sides.

�� Easy to install and maintain. The removable front panel allows full access.

� Heat ExchangerDue to its large surface of 26 m²the exchanger provides an except ionally high efficiency. Made from aluminium to ensuredurability and high quality. Easyto remove for cleaning purposes.

� FansTwo silent and energy saving centrifugal fans with energy saving EC-motors move thesupply air and extract air.They are maintenance free andeasy to remove for cleaning.

� DuctingR or L handing ensure easy andcrossover-free connection of theducting for supply and extractair using ducts with nominal dia-meter of 160 mm. Spigots forconnection located on top of theunit.


KWL EC 500 Pro meets even thehighest comfort requirements.Equipped with an electric pre-heater, and an automatic bypassfunction as standard. An easy-to-use LCD controller is inclu-ded.

Special features ofKWL EC 500 Pro� Air filter �� Supply of cleaned air via prefilterG4, a pollen filter F7 can optio-nally be added. The extract airpasses filter G4 before enteringthe heat exchanger. All filters areeasy to clean and replace.

� Frost protection/pre heater�� KWL EC 500 Pro units deliveredas standard with an electric pre-heater which heats the intake airwhen the temperature is too low.This prevents ice from buildingup in the heat exchanger andensures optimal heat recoveryeven during the winter months. Adjustable from –6 to +15 °C.

� Speed control– Automatic control of ventilationoperation via LCD controllerwhich is delivered as standard.Additional controllers (up to 3)and inteligent sensors (up to 5CO2 an 2 humidity sensors) canbe connected.

– 8 speed steps for ideal ventilationand on/off via one or more re-mote controllers.


�� LCD controller– Programming of basic and maximum ventilation level aswell as humidity- and CO2-limits,etc.

– LCD-Display for temperature,maintenance and menu.

– Optical filter display with adjustable time segments.

– Maximum ventilation function oropen fire function via switch(switch has to be provided bycustomers). This prevents draw-ing smoke into the room fromopen fires.

– Integrated digital week timer.– Adjustable speed proportion ofthe supply air and extract air fans.


� Summer operationComes with automatic bypassfunction as standard. If summerfunction is selected via the con-troller – according to the definedsettings – the heat exchanger isbypassed

� Electrical connectionDelivered ready to plug in. Easily accesible external terminal boxwith connections for further LCDcontrollers, sensors etc. The sup-plied LCD controller is alreadyconnected.


� Air filter�� Supply of cleaned outside airusing a G4 filter. Superfine filter(filter class F7) against pollen isavailable as an accessory. Ex-tract air passes a G4 filter beforeentering the heat exchanger.


� Speed control�� The speed control supplied hasa 4-step operation switch whichcan be mounted in a distanceup to 100 m. Power levels canbe chosen from 5 speeds according to the air flow volume(see diagram).



� Summer operationThe unit comes with a manuallyoperated bypass function asstandard. In this case the outsi-de air goes through the KWLwithout passing the heat ex-changer to prevent the heatrecovery function.





Supply Extract

IntakeExhaust

Condensationoutlet Ø 12 mm

Condensationoutlet Ø 12 mm

Supply Extract

IntakeExhaust

9191

Heat reco

very




� Accessory KWL EC 500 Pro

Controller (additional)User friendly LCD controller; details see “speed control“ on theleft page. One controller included.Additional ones can be orderedseparately. Up to three controllerscan be installed.Dim. mm (WxHxD) 90 x 107 x 21KWL-FB Ref. No. 9417



BMS-modulesAllow the connection of KWL EC500 to a LON or EIB-BMS-Net-work to control it from a centralstation and check its data.Dim. mm (WxHxD) 120 x 158 x 75EIB-BMS-moduleKWL-EB Ref. No. 9416LON-BMS-moduleKWL-LB Ref. No. 9415




� – �KWL EC 500 Pro


V· m3/h

∆pstat.Pa


Voltage/Frequency 230 V / 1 ph. / 50 Hz


– max. total 6.2


– pre-heater 4.4

Sound levels dB(A)*Supply LWA (sound power level) 56 53 50 46 44 41 39 35Extract LWA (sound power level) 52 49 46 44 42 39 38 35Case breakout LPA in 1 m 48 46 43 40 38 35 33 30


Technical data KWL EC 500 Pro for wall mounting


.m3/h 550 495 430 365 320 275 235 190

Power fan 2 x W 143 110 79 50 42 30 22 16



Summer Bypass Auto., adjustable from 0 to +25 °C, with heat exchanger cover


Voltage/Frequency 230 V / 1 ph. / 50 Hz


Sound levels dB(A)*Supply LWA (sound power level) 56 50 46 41 35Extract LWA (sound power level) 52 46 44 39 35Case breakout LPA in 1 m 48 43 40 35 30


Technical data KWL EC 500 Eco for wall mounting


.m3/h 550 430 365 275 190

Power fan 2 x W 143 79 50 30 16





92

KWLC 350 and KWL EC 350

� Cross flow heat exchangerLarge cross section with high efficiency. Robust design, madefrom aluminium. Simple toremove and thus easy to clean.

� FansTwo silent and energy savingcentrifugal fans arrange for thetransport of the supply air andextract air. They are maintenancefree and easy to clean.

� Air filter�� see description of KWLC 650, page 94.

� Frost protection/pre-heatingAn electrical pre-heater preventsthe heat exchanger from icingup. KWL EC 350: The thermo-controlled supply air fan turns offwhen the outside temperature istoo low.

� Speed control– KWLC 350..

�� The three-speed controller supplied as standard. One offive speeds can be selected asmedium speed � (as per therequired capacity, see perfor-mance curve).

�� For more details, LED-displayand differential pressure switchDDS (accessory) see descriptionof KWL 650, pages 94 and 95.

�� The controller comes with 12 mtrs. of cable and can be installed surface or flush mounted.

�� The controller can be combinedwith a clock timer (WSU, acces-sory) for automatic operation.KWL-WSU Ref. No. 0856

Slim units for universalinstallation for ventilation withheat recovery. To be installedvertically or horizontally. Suitableas central unit for controlledventilation of residential buil-dings. Also suitable as decentralsolutions for commercial andindustrial applications.

Energetically tested on ability bythe TÜV. General approved by theDIBt.

� Special characteristics�� High efficient heat exchanger.�� Easy duct installation. The unitcan be installed either wayround as the easily removableaccess panels are on both si-des. Duct spigots on each endwith an additional exhaust spi-got on the top of the unit. Thusthese options reduce the ductruns and bends to reduce los-ses and increaseefficiency.

�� Double skinned casing for excellent heat and noise insulation.

� Specification� Casing�� Made from galvanised steel.Double skinned with 50 mmthick heat and noise insulatingmineral wool.

�� Side panels are easily removablewithout tools through openingthe clamps for free access to allelements. Perfect for cleaning,filter change and service.

�� Anti vibration feet supplied witha slope towards condensationspigot, for vertical units.

�� KWL EC 350 models with combicasing that can be installed ver-tically and horizontally.

� Speed control– with KWL EC 350..

�� The three speed controller is in-cluded with the unit which canbe installed at any distance up to200 m from the KWL unit. The medium speed step � canbe chosen from five speeds (asper your desired capacity).

�� An automatic remote controller(AFS, accessory) for automaticor manual control with weekly timer. AFS Ref. No. 0053

�� Filter condition is indicated incombination with differentialpressure switch DDS(accessory).DDS Ref. No. 0445

� Heater batteryWith very low temperatures theintake air can be warmed up ad-ditionally with a heater battery:

�� Electric heater battery (..EH) tobe controlled by built-in adjusta-ble thermostat.

�� Water heater battery (..WW),for temperature control useWHST 300 T38 (accessory).WHST 300 T38 Ref. No. 8817

� Summer operation To supply cool outside air inwarmer periods the unit isequipped with a summer kit asstandard.

� Electrical connectionLarge terminal box with easy access on the upper side of thecasing.

� Condensation connectionThe condensation outlet ø 15 mmis located at the bottom of theunit. Trap delivered as standard.To be connected with the drainpipe by installer.

KWL EC – with energy savingEC motor technology andhighly eficient heat exchangers.

� The special characteristics�� EC motor technologyElectronically commutated DCmotors run on low energyconsumption and with highefficiency even if controlled.

�� The power of the KWL EC ventilation units with heat recovery can be adjusted nearly stepless without loss to the required capacity on site. The user can choose any three speeds used foroperation from 15 perfor-mances.

�� The innovative constant air flowcontroller ensures that the settedair flow volume stays constanton every speed, independentfrom changing resistances (e.g.soiled filters).

�� The efficient and generouslysized aluminium heat ex-changer produces togetherwith the energy saving EC fansan extraordinary high efficiency. The ducting can be designedperfectly, so that a superbefficiency is achieved.

Dimensions in mm

Photo shows type for vertical installation

Lieg

ende

Aus

führg.

Kond

ensa

tablau

fØ

12 m

m

Central ventilation units with heat recovery Vertical and horizontal version for room units up to 350 m3/h

KWL.. 350

Horiz

ontal v

ersion

:Co

nden

satio

nou

tlet ø

12 mm

Vertical version:Condensationoutlet ø 15 mm

Supply Extract

Intake

Exhaust

� Other accessories PagesKWL®-“Periphery“ 100 on – Undersoil heat exch. 102 on – Air distribution systems 106 on – Insulated duct system 111– Further overview 112 – Spare filters 113


9393

Heat reco

very

Frequency Hz Total 125 250 500 1k 2k 4k 8k LWA Extract dB(A) 50 41 45 43 43 42 38 31LWA Supply dB(A) 64 49 55 53 54 61 57 52LPA Case breakout dB(A) 47 36 41 43 41 38 32 24

� Min. air flow� Variable step 2� Max. air flow


� Step 1, variable, green � Step 2, variable, blue � Step 3, variable, red

KWLC 350 KWL EC 350 with EC technology

V· m3/h

∆pstat.Pa

V· m3/h

∆pstat.Pa

� AccessoryClock timer(for KWLC 350..)Digital clock timer with LCD-dis-play to control operation automati-cally. Clock timer adjustable foreach day of the week. Suitable forflush and surface installation.

Automatic timer/remote controller(for KWL EC 350..)Adjustable daily programming orweekly programming with individualsettings for single days. Features:on/off, automatic and manual operation, filter control (via DDS,accessory), heater on/off manually.

KWL-WSU Ref. No. 0856Dim. in mm (WxHxD) 85 x 85 x 52

AFS Ref. No. 0053Dim. in mm (WxHxD)162 x 80 x 44

Terminal box 125 x 125 x 75

KWLC 350 and KWL EC 350Technical data

Additional module ZMPA(for KWLC 350..)To allow the user to override thecontrol panel, if fans are used inMIN or MAX mode.Dim. mm (WxHxD) 110 x 110 x 60KWL-ZMPA Ref. No. 1430

Additional module ZMEA(for KWLC 350..)This module allows the control ofthe unit via external control signals.There is a volt free contact to indi-cate the 3 operating conditions.Dim. mm (WxHxD) 110 x 110 x 60KWL-ZMEA Ref. No. 1431

—/5.40 —

6.15 0.75

Electric heater kW 0.975 0.975

– pre-heater/heater battery 4.2/4.3 4.2/—

– max. overall 9.6 5.3

— —

230 V / 1 ph. / 50 Hz 230 V / 1 ph. / 50 Hz

64 58 49 64 58 4950 44 35 50 44 3547 41 32 47 41 32

Technical data

For vertical installation KWLC 350 SEH 0076 KWLC 350 SWW 0174For horizontal installation KWLC 350 LEH 0077 KWLC 350 LWW 0175

KWLC 350With electric heater battery With water heater battery (PWW)Type Ref. No. Type Ref. No.

Air flow volume on speed step* � �Supply/extract air flow volume V..

.m3/h 350 170 120 350 170 120

Heat power/heater battery kW 1 (electric) 11)

Voltage/Frequency 230 V / 1 ph. / 50 Hz 230 V / 1 ph. / 50 Hz

Max. Amps – ventilation 1.1 1.1

Power fan 2 x W* 120 60 25 120 60 25

Sound levels in dB(A)*Intake LWA (sound power level) 64 58 49 64 58 49Exhaust LWA (sound power level) 50 44 35 50 44 35Case breakout LPA at 1 m 47 41 32 47 41 32

Wiring NYM-J 3 x 1.5 mm2 NYM-J 3 x 1.5 mm2

Temperature operation range –20 °C to + 40 °C –20 °C to + 40 °C

Connection of PWW-heater battery in mm — ø 12

Wiring diagram 832 832– Principle wiring — —

Weight approx. in kg 50 50

* Figures relate to the three performances with the thick lines in the diagram. 1) At supply air temperature (before heater) 0 °C and water temperature of 60 °C.

KWL EC 350 with EC technology

KWL EC 350 EH 0848 KWL EC 350 WW 0849vertical and horizontal installation vertical and horizontal installation

KWL EC 350With electric heater battery With water heater battery (PWW)Type Ref. No. Type Ref. No

100 – 300 m³/h in 15 variable steps 100 – 300 m³/h in 15 variable stepssee performance curve see performance curve

1 (electric) 11)

0.75 0.75

76 40 15 76 40 15

NYM-J 3 x 1.5 mm2 NYM-J 3 x 1.5 mm2

–20 °C to + 40 °C –20 °C to + 40 °C

— ø 12

759.2 761.2575.1 575.1

50 50

94

Central ventilation units with heat recovery Vertical and horizontal version, up to approx. 650 m3/h

Dimensions in mm

� Specification� Casing�� Made from galvanised steel.Double skinned with 50 mmthick heat and noise insulatingmineral wool.

�� Side panels are easily removablewithout tools through openingthe clamps for free access to allelements. Perfect for cleaning,filter change and service.

�� Supplied with anti vibration feetand is inclined towards the con-densation outlet (vertical unitsonly).

� Cross flow heat exchangerLarge cross section with high efficiency. Robust design, madefrom aluminium. Simple to remove and thus easy to clean.

� FansTwo low noise and energy savingcentrifugal fans provide extractand supply, maintenance freeand easily removable for cleaningif necessary.

� Filters�� Supplied as standard: Clean intake air from two filters.The supply air is filtered by a prefilter G3 and fine filter F5 beforeentering the heat recovery secti-on. Another filter (G3) cleans theextract air before entering theheat exchanger.

�� Pollen filter class F7 (accessory)available for people with allergies.

�� All filters can be removed easilyfor cleaning and changing.

� Frost protection/pre-heaterAn electric pre-heater preventsthe heat exchanger from icing up.

Slim units for universal installation for ventilation withheat recovery. KWLC 650 for vertical or horizontal installation.

Suitable as central or decentrali-sed solution for rooms in com-mercial or industrial applicati-ons.

The units are according toEN 60 335-1

� Special characteristic�� Easy duct installation. The unitcan be installed either wayround as the easily removableaccess panels are on both si-des. Duct spigots on each endwith an additional exhaust spi-got on the top of the unit. Thusthese options reduce the ductruns and bends to reduce los-ses and increase efficiency.

�� Casing made from galvanisedsteel. Double skinned with 50 mm thick heat and noiseinsulating mineral wool.

� Speed control�� The three speed controller is in-cluded with the unit. The medi-um speed step � can be cho-sen from five speeds (as shownin the performance curve).

�� The controller includes two pushswitches with the following functions:

– Control of the ventilation power:“min., medium, max.“

– Off/automatic switch for theelectric heater. The settings aredisplayed with 6 LEDs: 3 ventila-tion steps, heater “auto/off“ andheater “active“, “failure“ (red).

�� The controller comes with 12metres of cable and can be installed surface or flush mounted.

�� Combined with the differentialpressure switch (DDS, accesso-ry) the condition of the filter isdisplayed with the red LED.DDS Ref. No. 0445

�� The controller can be combinedwith a clock timer (WSU, acces-sory) for automatic night setback.KWL-WSU Ref. No. 0856

� Heater batteryWith very low temperatures theintake air can be warmed up additionally with a heater battery:

�� Electric heater battery (..EH) iscontrolled by built-in adjustablethermostat.

�� Water heater battery For temperature control of ..WWmodel use WHST 300 T38(accessory).WHST 300 T38 Ref. No. 8817

� Summer operation To supply cool outside air in warmer periods the unit is equipped with a summer kit asstandard. Can be changed easilyin place of the heat exchanger.

� Electrical connectionReady to plug in by shock-proofplug.

� Condensation connectionThe condensation outlet ø 15 mmis located at the bottom of theunit. Trap delivered as standard.To be connected with the drainpipe by installer.

KWLC 650

(Figures shows vertical type)

KWLC 650

Horiz

ontal v

ersion

:Co

nden

satio

nou

tlet ø

12 mm

Vertical version:Condensation outlet ø 15 mm

Supply Extract

Intake

Exhaust




9595

Heat reco

very

KWLC 650Technical data

– pre-heater/heater battery 4.3/8.7 4.3/—

– max. total 15.5 6.8

Electric heater kW 1 1

Power fan 2 x Watts* 200 115 75 200 115 75

Sound levels in dB(A)*Intake LWA (sound power level) 68 61 45 68 61 45Exhaust LWA (sound power level) 55 48 38 55 48 38Case breakout LPA at 1 m 50 44 35 50 44 35


� Min. air flow� Variable step 2� Max. air flow

Technical data

For vertical installation KWLC 650 SEH 0176 KWLC 650 SWW 0167For horizontal installation KWLC 650 LEH 0178 KWLC 650 LWW 0170

KWLC 650 KWLC 650With electric heater battery With water heater battery (PWW-) Type Ref. No. Type Ref. No.

Air flow volume on speed step* � �Supply/extract air flow volume V.

.m3/h ca. 650 450 240 650 450 240

Heat power/heater battery kW 2 4 1)

Voltage/Frequency 230 V, 1 ph., 50 Hz 230 V, 1 ph., 50 Hz

Max. Amps – ventilation 2.5 2.5

Electrical connection NYM-J 3 x 2.5 mm2 NYM-J 3 x 1.5 mm2

Temperature operation range –20 °C to + 40 °C –20 °C to + 40 °C

Connection of PWW heater battery in mm — ø 12

Wiring diagram no.– with remote switch 833 833– with remote automatic switch AFS — —– Principle wiring — —

Weight approx. in kg 72 72

* Figures relate to the three performances with the thick lines, achieved either through a stepped controller or the automatic controller AFS (accessory).1) at intake air temperature (before heater) 0 °C and water temperature of 60 °C.

V· m3/h

∆pstat.Pa

KWLC 650 � Accessory

Clock timerDigital clock timer with LCD-dis-play to control operation automati-cally. Clock timer adjustable foreach day of the week. Suitable forflush and surface installation. Dim mm (WxHxD) 85 x 85 x 52KWL-WSU Ref. No. 0856


Air temperature control For air temperature control ofintegrated PWW water heaterbattery. Consisting of thermostatwith remote controller and remotesensor. Delivery as complete setincl. thermostat for room installati-on, gate valve, set piston, capillarytube remote sensor and mountngmaterial.WHST 300 T38 Ref. No. 8817

Additional module ZMPATo allow the user to override thecontrol panel, if fans are used inMIN or MAX mode.Dim. mm (WxHxD) 110 x 110 x 60KWL-ZMPA Ref. No. 1430

Additional module ZMEAThis module allows the control ofthe unit via external control signals.There is a volt free contact to indi-cate the 3 operating conditions.Dim. mm (WxHxD) 110 x 110 x 60KWL-ZMEA Ref. No. 1431

indoorcomfort–energysaving. … fan 2xw 421 wiring diagram no ... d i me nso kwl ec 200.. l ......

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