DZNE |Research Center DZNE | Bonn

The PDA-R (round front panel) and PDA-Q (square front panel) are swirl diffusers with fixed delicately stamped, radially arranged blades. The square diffuser PDA-Q may be perforated in two different variants. The blades of the variants Q1 and Q2 are slightly less delicate in their perforation. The front panel is mounted by a central screw.

The slot diffuser VZ-41 is a linear diffuser with a system width of 41 mm, especially well suited for wall and ceiling mounting. The diffuser is available in single- and multi-slot configurations and is suited for continuous assembly. The slot diffuser consists of extruded aluminium profiles with or without side support as well as rotatably mounted, individually adjustable air guiding elements with rectifier blades and boomerang profiles. The slot diffuser VZ-41 can be used for supply as well as exhaust air (also as a combined supply and exhaust air diffuser with parallel rails) and is especially suited for constant and variable volume flows in rooms with ceiling heights of 2,30 meters to 4,00 meters. The recommended flow rate is between 50 m³/h and 150 m³/h per meter at temperature differences of +4 K to -12 K.

The tube diffuser VZ-AR consists of a longitudinally welded jacket tube with lengthwise arranged slots with integrated air guiding nozzles in form of double boomerang profiles with rectifier blades. The possible amount of parallel slot-rows is mainly limited by its dimensioning. The connection of single tube diffusers to a string is accomplished via a spigot with lip seal, alternatively with METU-flanges. The tube diffusers are designed for visible installation and fulfill the highest of architectural and ventilation demands. The exhaust air variant consists of a tube diffuser with a longitudinally welded jacket tube with a round VZ-AR-AL cross section with cross to the longitudinal axis punch-outs. The dimensions of the models are determined depending on the exhaust air volume.

The PU is a square ceiling diffuser consisting of a perforated, cubic body with a connecting unit and a vertical spigot. The front panel is mounted by a central screw (size 700 with additional screws at the edges).

The KVR-S is a constant flow rate controller operated with external energy. Adjustment is done by an asymmetrically arranged, angled control plate that guarantees good control even at low flow rates. The range of operation (depending on size) is between 40 m³/h and 4500 m³/h at temperatures between -30°C and +100°C. The control performance is ensured regardless of the type of installation or whether it is installed in a supply or exhaust air system. The control accuracy is +/- 10 % from the configured nominal flow rate.

The active chilled beam AKK is a ceiling cooling convector for free and forced convection during operation. It consists of a finned tube heat exchanger with attached axial fans that are surrounded by a closed frame. The unit heat exchanger/ fan can be folded down for cleaning and maintenance purposes. The room-side of the chilled beam is equipped with a veneer made of stainless steel front profiles from the DSM series (optional).

The STG fan controllers are designed for controlling the fan speed of compact fans used in multiple SLT products. Some of those products are for example the chilled beam for floor and wall mounting as well as the chilled beam unit for expanding an SLT tube diffuser system. The fan controllers are available as the STG-27 and STG-38 model. STG-27: fan speed control of fans with AC motors with a supply voltage of 220 VAC. STG-38: fan speed control of fans with DC-PWM-fans with a supply voltage of 12 VDC or 24 VDC.