Product data sheet Plenum boxes AK-Uni Square diffuser face with square plenum box For circular diffuser faces Square plenum box for universal connection of ceiling diffusers type VDW, TDV, RFD, FD, TDF, TID, ADLQ, DLQ, ADLR, DLQL Standard plenum box for supply and extract air for square diffuser faces and for all type TDV, RFD, TID, ADLQ, DLQ, ADLR and DLQL diffusers. ■ Plenum box made of galvanised sheet steel ■ For all types of ceiling systems ■ Horizontal duct connection ■ Permanent equalising element that ensures an optimum airflow through the diffuser face (supply air variant) ■ For comfort zones and industrial zones Optional equipment and accessories ■ Damper unit for volume flow rate balancing ■ Pressure tap and cord-operated damper blade for volume flow rate balancing ■ Lip seal

Product data sheet General information Function Technical data Specification text Order code Variants Dimensions and weight Project-specific solutions Product details Nomenclature General information Application ▪ Plenum boxes for the connection of square and to some extent circular diffuser faces to circular ducts, suitable for supply air or extract air applications ▪ For diffuser faces of types VDW, TDV, RFD, FD, TDF, TID, ADLQ, DLQ, ADLR, DLQL, with central screw fixing ▪ For variable and constant volume flows Special features ▪ Plenum box made of galvanised sheet steel ▪ For all types of...

Product data sheet Function Plenum boxes are used to connect ceiling diffusers to circular ducts and to fix the diffuser face. Type AK-Uni plenum boxes are fitted with an equalising element that ensures that the air is evenly distributed to the room. A damper blade (optional) simplifies volume flow rate balancing for commissioning. Pressure tap and cord-operated damper blade (optional) allow for volume flow rate balancing with the diffuser face in place. Schematic illustration of square plenum box with horizontal spigot A Plenum box for square diffuser faces B Plenum box for circular diffuser...

Product data sheet

Product data sheet Alternative combinations Variant VDW-Q Nominal size K value Diffuser face variant FD-Q Nominal size K value ADLQ DLQ Nominal size K value 600< 182.4 625<

Product data sheet Plenum boxes for circular diffuser faces Standard combinations Diffuser face variant Variant TDV-SA-R Nominal size Nominal size

Product data sheet Specification text This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design program. Specification text Square plenum boxes for the connection of square and to some extent circular diffuser faces to circular ducts, suitable for supply air or extract air applications. For installation into all kinds of suspended ceilings. Ready-to-install component which consists of the plenum box, permanent equalising element (only supply air variants), side entry spigot, cross bar, and suspension holes....

Product data sheet Order code AK-Uni – 002 – ZL – M – L | | | | | 1 2 3 4 5 1 Type AK-Uni Plenum box 2 Variant 001 – 033 3 System ZL Supply air AL Extract air 4 Damper blade for volume flow rate balancing No entry required: None M With MN With cord and pressure tap 5 Accessories No entry required: None L with lip seal Order example: AK-Uni-003-ZL-MN-L Variant Air conditioning system Damper unit for volume flow rate balancing Accessories 003 Supply air Volume flow rate adjustment with cords and pressure tap With lip seal

Product data sheet For square diffuser faces For circular diffuser faces

Product data sheet Dimensions and weight Universal plenum box AK-Uni for square diffuser faces

Product data sheet Universal plenum box AK-Uni for circular and square diffuser faces with circular face style AK-Uni for circular diffuser faces □Q3 Variant

Product data sheet Universal plenum box AK-Uni for RFD and TID □Q₃ AK-Uni for type RFD and TID diffuser faces □Q3 H3 Variant AK-Uni-028 AK-Uni-029 AK-Uni-030 AK-Uni-031 AK-Uni-032 AK-Uni-033 Project-specific solutions For low construction heights in the suspended ceiling, plenum boxes with 2 smaller spigots are also available, which have a lower installation height.

Product data sheet Product details Commissioning Volume flow rate balancing When several diffusers are connected to just one volume flow controller, it may be necessary to balance the volume flow rates. ▪ Ceiling diffusers with square plenum box and damper unit (variant -M): The diffuser face can be removed to access the damper unit; the damper unit can then be set to any position between 0 and 90° ▪ Ceiling diffusers with square plenum box, damper unit and pressure tap (variant -MN): The diffuser face need not be removed as the flow adjustment damper can be set with 2 cords (white and green)....

Product data sheet AK-Uni-...-MN Volume flow rate balancing AK-Uni-...-MN Volume flow rate balancing ① Damper blade ② White cord for opening the damper blade ① Damper blade ② Green cord for closing the damper blade Closed (maximum restriction), 90° AK-Uni-...-MN volume flow rate measurement Volume flow rate calculation for air density 1.2 kg/m³ ① Measuring tube ② Pressure tap ③ Damper blade for volume flow rate balancing ④ White cord for opening the damper blade ⑤ Green cord for closing the damper blade ⑥ Digital manometer ⑦ Text label indicating plenum box variant (to be provided by others)...

Product data sheet Nomenclature A [mm] Position of the spigot, defined by the distance of the spigot centre line to the lower edge of the suspended ceiling C [mm] Length of the spigot ØD [mm] Outer diameter of the spigot ØD4 Outer diameter of a circular diffuser face H₃ [mm] Height of a ceiling diffuser with plenum box, from the lower edge of the suspended ceiling to the upper edge of the plenum box or of the spigot m [kg] Weight Q3 [mm] Dimensions of a square plenum box qv [m³/h]; [l/s] Volume flow rate Lengths Lengths are given in [mm] unless stated otherwise.