DID632
20Pages

Active Chilled Beams Type DID632

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 Adjustable air discharge direction ________________10 Nomenclature ________________________________11 Selection example ____________________________12...

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 a horizontally mounted heat exchanger into the mixing chamber. Both air flows mix and the total supply air is discharged horizontally into the space through integral slot diffusers. There are eight nominal...

Construction · Dimensions Characteristics – – – – – – – – – – – – Fresh air range 6 to 85 l/s, 22 to 306 m³/h For clear room heights from approximately 2.6 to 4.0 m Flush ceiling installation Lengths from 893 to 3000 mm and widths 593, 598, 618 and 623 mm, thus suitable for all ceiling systems Four options of induced air grille design Nozzles in four sizes to optimise induction Nozzles punched in sheet metal plate, non-combustible Optional adjustable control blades to control the air discharge direction Heat exchangers for two or four pipe systems Supply-extract-air combination available...

Construction · Dimensions Supply-extract-air combination – Integral extract air casing for removal of extract air through the ceiling – Flow rate range 6 to 85 l/s, 22 to 306 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 = Overall length (diffuser face) LN = Nominal length B = Face frame width Fresh (primary) air spigot LN − 62 Fresh (primary) air spigot

Casing configurations Supply air Construction variant Water connections Centred Centred Right Right Left Left Right Left Right Left Right Left Order code * The construction variants MR, ML, RR and LL are available only from L = LN + 200 mm. Type DID632...-MR* Casing: Water connections: centred right Casing: Water connections: centred left Type DID632...-RR* Casing: Water connections: Casing: Water connections: Type DID632...-LR Casing: Water connections: right right left right right left Casing: Water connections: left left

Casing configurations Supply-extract-air combination Left Right Left Right Supply-extract-air combination only for arrangements LL and RR, available from L = LN + 250 mm Type DID632...-LL-AV Casing: Water connections: Extract air spigot: Casing: Water connections: Extract air spigot: Type DID632...-LL-AH Casing: Water connections: Extract air spigot: Front Front Rear Rear Order code LL-AV RR-AV LL-AH RR-AH right right front left left rear Left Right Left Right left left front Construction variant Water connections Casing: Water connections: Extract air spigot: right right rear

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. The primary air is connected to the inlet spigot. The heat exchanger has common flow...

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 exchanger is accessible when the induced air grille has been hinged down or removed. To hinge down the induced air grille on its long side...

Adjustable air discharge direction If a large cooling capacity is required in a very small space with active chilled beams, the use of an adjustable horizontal air discharge can still result in acceptable air velocities in the occupied zone. The spread of the air discharge can be increased dependent on room geometry. In case of change of use the air discharge can be optimised by subsequent adjustment. – Several control blade elements are linked together to provide a uniform adjustment – For finer adjustment of individual elements cut the connection strip (plastic) between control blade...

∆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 QWH tWVH VWH tWRH QWK tWRK VWK tWVK 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...

Selection example First step in selecting active chilled beams is based on the quick selection table (Page 14). 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 16 to 18. 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. Support profile Given Flexible office, width 3 modules Room width: Room depth: Room height:...