Catalog excerpts
SCHAKOVolumetric flow controllerVRAR Leakage air flow with control damper closed according to DIN EN 1751, up to class 3 Ferdinand Schad KG SteigstraBe 25-27 D-78600 Kolbingen Telephone +49 (0) 74 63 - 980 - 0 Fax +49 (0) 74 63 - 980 - 200 info@schako.de schako.com
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08/60 - 2 Construction subject to change. Version: 30.03.2020 No return possible!
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Volumetric flow controller VRAR Description A volumetric flow controller is used for pressure-independent volumetric flow regulation in ventilation and air-conditioning systems. It is used to keep the volumetric flow constant (CAV) within specified limits or to control it variably (VAV) as a function of a command variable, for example a room temperature controller, DDC or bus system. For constant volumetric flows, the operating stages CLOSED/Vmin/Vmid/Vmax/OPEN are available in stage operation, controlled via relays or switches. The housing, measuring sensor, control flap, PI controller...
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Volumetric flow controller VRAR All volumetric flow controllers can be assembled with horizontal or vertical damper axis. Field of application - for supply and return air systems - for constant CAV or variable VAV installations. - for positive control Vmin, Vmid, Vmax, “OPEN" or "CLOSED" - For volumetric flow and linear pressure control - in the differential pressure range 50 - 1,000 Pascal - at ambient temperatures 0 ...+...50 °C, requirement: measuring air 0...+ +50 °C/5...95% rH, non-condensing - with command signal 0...10 V DC, 2...10 V DC, via MP bus (Belimo) or Lon, Modbus, KNX,...
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Volumetric flow controller VRAR Construction Housing - Galvanised sheet steel (-SV) - Galvanised sheet steel with DD coating inside (-DD) - Stainless steel 1.4301 (-V2) or 1.4571 (-V4) Damper blade - Galvanised sheet steel (-SV) - Stainless steel 1.4301 (-V2A) or 1.4571 (-V4A) Damper leaf seal - made of PUR, silicone-free - for airtight sealing design to DIN EN 1751 Damper bearing - Brass Measuring cross - Extruded aluminium profile (for stainless steel design with DD coating) Measuring cross support - Plastic (PA6) Model VRAR-... - round design, for spiral duct connection to DIN EN 1506,...
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Volumetric flow controller VRAR Models and dimensions Dimensions with electric controller VRAR-...-DS0, without acoustic cladding with pneumatic controller VRAR-...-DS0, without acoustic cladding Available sizes VRAR-... Construction subject to change.
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Volumetric flow controller VRAR Accessories - dimensions Rubber lip seal (-GD1), on both sides Detail X Flat flange (-FF1/-FF2, pair), on both sides according to DIN 24 154/5 Please note! Duct silencers must be ordered separately! For further information, see duct silencer RS documentation. Available sizes flat flange (-FF1/-FF2)
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Volumetric flow controller VRAR Insertion loss Duct silencer (-RS-N) RS-N-...-50/100, L1=500, without central baffle RS-N-...-50/100, L1=1450, without central baffle RS-N-...-50/100, L1=950, without central baffle Version: 30.03.2020 Construction subject to change. No return possible!
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Volumetric flow controller VRARTechnical data Volumetric flow range VRAR-A..., with electric controller NW (mm) VRAR-A..., with pneumatic controller Attention, the following specifications are important for the programming of the volumetric flow controllers: - this table merely specifies the complete measuring range of the controller (volumetric flow range) - If the customer absolutely wants a calibration curve different from 12 m/s, it must be specified! Once it is approved by the competent department, it can be adjusted correspondingly. - When the air volume drops below the Vmin shown in...
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Volumetric flow controller VRAR Static minimum pressure difference VRAR-A..., with electric controller Construction subject to change.
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Version: 30.03.2020 No return possible! Construction subject to change.
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Version: 30.03.2020 No return possible! Construction subject to change.
Open the catalog to page 12
Version: 30.03.2020 No return possible! Construction subject to change.
Open the catalog to page 13
Version: 30.03.2020 No return possible! Construction subject to change.
Open the catalog to page 14
Version: 30.03.2020 No return possible! Construction subject to change.
Open the catalog to page 15
Version: 30.03.2020 No return possible! Construction subject to change.
Open the catalog to page 16
Version: 30.03.2020 No return possible! Construction subject to change.
Open the catalog to page 17
Version: 30.03.2020 No return possible! Construction subject to change.
Open the catalog to page 18
Version: 30.03.2020 No return possible! Construction subject to change.
Open the catalog to page 19
Version: 30.03.2020 No return possible! Construction subject to change.
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Volumetric flow controller VRAR Radiated noise VRAR with insulated connections on both sides 20 mm mineral wool insulation With a straight supply and return air flow of 3 m each, the VRAR acoustic cladding reduces the radiated noise by 8 dB(A). Construction subject to change.
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Volumetric flow controller VRAR Technical data of the control components Measured value collection and control function The measured value collection is carried out via a flow-favouring double measuring cross. The measuring openings are distributed over the measuring cross according to the median line method. The pressure differential formed on the measuring cross is determined by means of a dynamic or static measuring sensor. The measured values are averaged to give an average value which represents a measuring quantity for the volumetric flow. The controller compares the actual value...
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Volumetric flow controller VRAR Circuit diagrams Circuit diagram electric controller (standard) Compact controller Belimo make: LMV-D3-MP / NMV-D3-MP VAV with analogue command signal VAV with lock (CLOSED) MP bus activation Mode 2-10 V DC with integrated switch Lock mode (CLOSED) In the 2...10 V mode, the following function can be carried out with a 0...10 V signal: Contact closed, function active Contact closed, function active, in mode 2 ...10 V only Contact open * not available for DC 24 V supply Version: 30.03.2020 Construction subject to change. No return possible!
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Function Description / action Status display 24V power supply o.k. - VAV-Compact ready for operation Target volume reached Addressing via MP master (Acknowledgement at the VAV-Compact) Addressing via MP master (with serial number) MP-PP display Communication []| yellow LED (status) is flashing 1.) Synch time 2.) Adaptation time Construction subject to change. LED pattern Adaptation @ LED 1 power Address 0 LED 2 status Synchronisation started by: a) Operating / service unit b) Manual trigger device at the VAV-Compact c) Power ON behaviour Adaptation started by: a) Operating / service unit b)...
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