GebhardtVentilatoren - aeolosfans.com

1 VDirect drive withintegral mounted motorCentrifugal impeller withbackward curved bladesDA horizontal air outletDAV vertical air outletGas medium temperatureup to 40 CTechnicalDocumentation 6roof extract unitsDA/DAVG ebhardtVentilatorenDAV2 Allgemeine HinweiseQuality made by Gebhardt is the result of a strictly pursued quality have to offer features and properties which are above the averagevalues of comparable policy, applied since the foundation of the company, lead to a quality audit and a firstcertification in April 1985.

2 Since this date the Gebhardt quality system has been followingthe updates of the ISO modern production procedures and a quality policy defined and checked by aquality management team make sure that the products achieve the specified tolerances make sure that catalogue data are Management SystemDIN EN ISO 9001 Gebhardt roof units are usable machines in the sense of the EU Machine and Low VoltageGuidelines. They are identified with the CE Sign and supplied with an EU Declaration assessment of the dangers associated with the fans and the necessary engineeringsafety measures can be arrived at with the help of the VDMA Unit Sheet 24 167 Fans.

3 Safety Operating Instructions give which safety measures are still necessary on assembly toensure that the fans comply with the EU Machine Guideline 98/37 onMachine SafetyWe may modify the technical data or dimensions of these catalogue products in the caseof further data in this catalogue are those valid at the date of dataSafety GuardsAll roof units are supplied with a discharge-side mesh safety guard in accordance withDIN EN inlet side is not fitted with a standard guard, because it is normal practice to attachother system parts of the , if the unit is installed in such a way that accidental contact with the impeller ispossible, an additional inlet guard can be supplied as an accessory.

4 !3 SummaryGeneral4 5 Technical description6 12DA/DAV technical data12 23DA/DAV curves24DA/DAV dimensions25DH/DV technical data26 Review of accesories26 31 Accessories32 37 Starters and speed controllers38 43 Wiring diagramsDARoof extractor with built-in motor,horizontal with backward curved blades to extractslightly contaminated description 2 5 Technical characteristics 6 11 Curves12 23 Dimensions24 Accessories26 31 Starters and speed controllers32 37 Wiring diagrams38 43 DAVRoof extractor with built-in motor.

5 Vertical with backward curved blades to extractslightly contaminated description 2 5 Technical characteristics 6 11 Curves12 23 Dimensions24 Accessories26 31 Starters and speed controllers32 37 Wiring diagrams38 43 DHRoof ventilation cowl,rain guard, horizontal air outletor inlet for installationon mechanical or natural Description 2 5 Technical characteristics 25 Accessories26 31 DVRoof ventilation cowl,rain guard, vertical air outletor inlet for installationon mechanical or natural Description 2 5 Technical characteristics 25 Accessories26 314 Technical DescriptionType DAwith radial discharge perfectly suitablewhen the air to be extracted is only slightlyimpure, max.

6 Temperature + 40 robust construction, large overhangingrain-guard top, they are fitted with centri-fugal impellers with backward curved bladesdesigned to give optimum flow. A protectingguard is fitted on each roof extractors DAType DAVwith vertical discharge, recommended inparticular for extraction of gases orcontaminated air max. temperature + 40 air is extracted and dischargedvertically at high speed mixing with theatmosphere mainly above the , fouling and staining of the roofs isavoided. Of modern design, they are fitted with highefficiency backward curved centrifugalimpellers.

7 A protecting guards is fitted oneach roof extractors DAVType DHsupply or discharge horizontal cowl withoutimpeller, mainly used as terminal cowl inmechanical ventilation installations or forlocal natural ventilation cowl DHType DVsupply or discharge vertical cowl withoutimpeller. Similar use as that of the to restricted air flow, load losses areoverall higher than for the ventilation cowl DVRestistance to corrosion and weather isobtained by using materials such asaluminium and galvanised sheet. Increasedsurface protection is obtained by Gebhardtanti-corrosion descriptionMotorsDA/DAVD riving of the impellers is by external rotor motors.

8 These motors are to IP 44 protection,insulation class B. Ball bearings, chosen for their low sound level, guarantee ling balancing ensure operating free from vibration. Permissible ambient temperature is+40 motors, with the exception of explosion proof are protected against heat over-loads bycoil thermocontacts. These are connected in the drive circuit of the protection apparatus, andcut the motor when the limit temperature of the winding is reached and guarantee, thus, thebest protection possible (see connecting diagrams).

9 The use of magneto-heat thermal switch breakers is not necessary. The terminal box which iseasily accessible is under the removable cowl. Explosion proof units are fitted with a looselead 700 to 900 mm in units with speed control are marked on the page of technical data by a x. The variation inspeed is attained by supply voltage proof units: exRoof units meet the provisions VDMA 24 169 relating to ex: material and are intended forzone 1 and 2 explosive atmospheres, temperature class T3. Sound levelThe sound pressure level indicated is that shown above the roof at 4 metres from the geometriccentre of the DA roof units.

10 For models DAV the values are 2 dB(A) sound power radiating on the inlet side of the DA unit can be defined as follows:LpA = dB (A) according to the the overall sound power level add + 26 to the tabulated the weighted sound power level add + 18 to the tabulated the octave band sound power spectrum add the values listed below to the roof units models DAV these values increase by 2 Hzfm631252505001000200040008000 HzCorrectionLwrel1323,518,515983 1dBInfluence of automatic closing flap:Turbulence generated by backdraught shutters will increase the sound level approximately 2 page 26 Roof UnitsDADAVT yperpmKWV ASC/FLC 050100200300400DA + DAV 225-4x14000,146230/400 0,78/0,45 2,4171015801425940DA + DAV 225-6x9300,080230/400 0,47/0,27 1,71210970470DA + DAV 225-87100,050230/400 0,45/0,26 1,8820470DA + DAV 225-4/414000,1464000,452,417101580142594 012200,1000,181,4146012701040250DA + DAV 225-6/69000,0724000,261,912109704708000, 0380,11,11060780100DA + DAV 225-4/614000,1504000.