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DID312
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Active Chilled Beams Type DID312

Contents · Description Description __________________________________ 2 Functional description __________________________ 3 Construction · Dimensions ______________________ 4 Supply-extract-air combination __________________ 5 Casing configurations Supply air __________________________________ 6 Supply-extract-air combination __________________ 7 Installation __________________________________ 8 Assembly____________________________________ 9 Nomenclature ________________________________10 Selection example ____________________________11 Quick selection ______________________________12...

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Functional description Active chilled beams supply conditioned fresh air (primary air) to the space from a central plant room to maintain indoor air quality whilst providing additional cooling and/or heating using heat exchangers. The primary air is discharged into the beam mixing chamber via nozzles. As a result of this secondary air is induced via an inlet grille and then passes through vertically mounted heat exchangers into the mixing chambers. Both air flows mix and the total supply air is discharged horizontally into the space through integral slot diffusers. There are eight nominal...

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Construction · Dimensions Characteristics Construction features Fresh air range 5 to 70 l/s, 18 to 252 m³/h For clear room heights from approximately 2.6 to 4.0 m Flush ceiling installation Side entry fresh air connection Lengths from 893 to 3000 mm and widths 293, 300, and 312 mm, thus suitable for all ceiling systems Nozzles in three sizes to optimise induction Nozzles punched in sheet metal plate, non-combustible Heat exchangers for two or four pipe systems with condensate drip tray for low chilled water flow temperatures Supply-extract-air combination available Maximum operating...

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Supply-extract-air combination Characteristics – Integral extract air casing for removal of extract air through the ceiling – Flow rate range 5 to 50 l/s, 18 to 180 m³/h – Extract air spigot on the same side as or opposite the primary air spigot – Casing with extract air spigot made of galvanised sheet steel L = total length (diffuser face) LN = nominal length B = Face frame width Fresh (primary) air spigot Fresh (primary) air spigot

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Casing configurations Supply air Centred Centred Right Right Left Left Construction variant Water connections Right Left Right Left Right Left Order code Type DID312...-MR Casing: Water connections: centred right Casing: Water connections: centred left Type DID312...-RR Casing: Water connections: Casing: Water connections: right right Casing: Water connections: right left left right Casing: Water connections: left left

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Casing configurations Supply-extract-air combination Right Right Left Left Casing: Water connections: left left Type DID312...-LL-AH Casing: Water connections: left left Casing: Water connections: Water connections Right Right Left Left Construction variant right right Casing: Water connections: 107 right right Front Rear Front Rear RR-AV RR-AH LL-AV LL-AH Order code

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Installation The customer must install the active chilled beams, make all connections, and provide the hanging system, connection and sealing materials. Only trained expert personnel should install and make the appropriate connections. All legal regulations for site work must be complied with. The active chilled beam has four hanging brackets (six on nominal length 2100 and above) for suspending the unit from the ceiling slab using threaded rods, wires or metal hangers. Use only certified hanging systems. Casing Face frame Side entry spigot Hanging brackets Installation into T-bar ceilings...

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Assembly Maintenance As is the case with all diffusers that induce room air, depending on the cleanliness of the room air, deposits may accumulate on the surfaces of the diffuser. If required, clean the diffuser with commercial, non-aggressive cleaning agents. Clean the heat exchanger with an industrial vacuum cleaner. For maintenance, also see VDI 6022, Sheet 1 – “Hygiene Requirements on Ventilation Systems”. Removal of the induced air grille The heat exchangers are accessible when the induced air grille has been hinged down or removed. To hinge down the induced air grille on its long side...

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∆tl ∆th1 ∆tPr ∆tW ∆tRWV ∆pt ∆pW tR tWVK tWRK tWVH tWRH tPr QWK QWH Qtot QPr VWK VWH VPr VPrN VExt vl vh1 LWA a l h₁ h x Temperature difference between room air and core at distance l = x +h₁ Temperature difference between room air and core at distance l = a ⁄ 2 + h₁ Temperature difference between room air and conditioned fresh air Temperature difference between water flow and return Temperature difference between room air and water flow Total differential pressure Water-side pressure differential Room temperature Water flow temperature – cooling Water return temperature – cooling Water flow...

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Selection example First step in selecting active chilled beams is based on the quick selection table (Page 12). Listed capacities are valid only for the reference values. Second step, if the operating values differ from the reference ones, corrections must be made using diagrams and tables pages 13 to 15. Our “Easy Product Finder” online design programme is also available on the Internet for easy and detailed design of our products. Following example shows the unit selection using this leaflet. 4.05 Given Flexible office, width 3 modules Room width: 4.05 m Room depth: 5m Room height: 3m...

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For reference values which are the basis of the above table see page 13

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Reference values – Cooling tR tPr tWVK VWK VWK Water-side cooling capacity QWK in W Water flow rate VWK in l/h Reference values – Heating Water flow rate VWK Water-side pressure differential ∆pW in kPa Correction factors – Heating Water-side pressure differential ∆pW in kPa Correction factors – Cooling Water flow rate VWH 400 Water-side heating capacity QWH in W Water flow rate VWH in l/h

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