Swegon Indoor Climate Systems 2004 - Air distribution products - Rev. 4 June, 2007
www.swegon.comDRGa
Displacement unit for small air flows
FUNCTION
DRG is a rectangular displacement unit designed for small air flows, the air being supplied to the room at low velocity. The spread pattern is easily adjustable with the movable deflectors. It is suitable for rooms where many small units can be spread out for the best possible distribution of supply air, for example in assembly halls, theatres, cinemas, lecture halls etc. The unit is mounted under seats in the riser of the steps. The unit shown in the figure is painted in the optional standard colour, RAL 9010.
QUICK FACTS
- Adjustable spread pattern and affected area
- Simple installation
- Cleanable
- Available in a large number of special versions for optimum adaptation to the room
- Available in alternative colours
- Included in the MagiCAD and CadVent databases
DESIGN
DRG is a rectangular displacement unit consisting of two parts, the front plate and the mounting frame. The rectangular mounting frame is equipped with grooves in the short sides which fit the springs on the front plate. The perforated front plate has aerodynamically shaped discs. The front plate is pressed into the mounting frame and is held in place by the spring clips.
MATERIALS AND SURFACE TREATMENT
The mounting frame and the front plate are manufactured in galvanised sheet steel. The front plate is painted in the colour selected when the order is placed. The standard version is painted in jet black, RAL 9005. The unit is also available in other standard colours: Dusty grey 7037, white aluminium RAL 9006, grey aluminium RAL 9007, pure white RAL 9010 and signal white RAL 9003 (NCS 0500).
SPECIAL VERSIONS
In addition to the standard version, these displacement units are available in special dimensions, with or without discs, in different shapes etc. Please contact your nearest sales office for further information.
PLANNING
The spread pattern can be adjusted by turning the discs in the front panel.
INSTALLATION (See Figure 2)
The hole is cut as illustrated in the diagram. The mounting frame is placed in the hole and screwed to the framework through the short sides. The front plate is then pressed into place in the mounting frame.
COMMISSIONING (See Figure 3)
We recommend that the space underneath/behind the unit should function as a pressure chamber. The feed duct to each pressure chamber is then equipped with a measuring and commissioning damper.
MAINTENANCE (See Figure 3)
The displacement unit can be cleaned when necessary using luke warm water with detergent added.
ENVIRONMENT
The declaration of construction materials is available on our website.
Figure 3.Commissioning. Maintenance.
TECHNICAL DATA
- Sound level dB(A) applies to rooms of 10 m2 equivalent absorption area, which gives 4 dB room attenuation.
- The affected areas a0.20 and b0.20 are measured at Dt -3° and refer to the maximum velocity independence of the distance from the floor.
- Dt is the difference between the room temperature at 1.2 m above the floor and the supply air temperature.
- Recommended maximum under temperature 6 °C.
- For calculating the width of the spread pattern, air velocities in the zone of occupation or sound levels in rooms with other dimensions, please refer to our calculation programmes ProAir web and ProAc, which are both available for download on our website.
Sound data - DRG
Sound power level Lw(dB)
Table KOK