4DF
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05/09 - 2 Construction subject to change. Version: 20.09.2019 No return possible!

Ceiling diffuser 4DF Description The square ceiling diffuser type 4DF with fixed air deflection blades is suitable for use in supply and return air systems. The supply air is delivered horizontally in four directions. The air diffuser is fitted flush to the ceiling The construction of the faceplate allows easy cleaning. A volumetric flow meter can be integrated into the spigot of the plenum box at an extra charge. The measurement error of the volumetric flow meter is ± 5 % at a connection spigot velocity of 2-5 m/s and a straight flow pattern of at least 1 x D. The measurement is carried...

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Ceiling diffuser 4DF Models and dimensions Dimensions 4DF with SK-Q-07-Z-... (for supply air, with concealed mounting) 4DF with SK-Q-07-A-... (for return air, with concealed mounting) KHS= standard height of plenum box Special height of plenum box = øD + 102mm, but at least 200mm Spigot positions 05/09 - 4 Construction subject to change. Version: 20.09.2019 No return possible

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Ceiling diffuser 4DF Accessories - dimensions (at an extra charge): Volumetric flow meter (-VME1) Fastening methods Screw mounting (-SM) only for connection to fire protection unit NW 310 with indentation for slotted shallow-raised countersunkhead tapping screw (on-site) - NW 310: DIN ISO 7051 pitch 3.9 - NW 400-625: DIN ISO 7051 pitch 4.8 Rubber lip seal (-GD1) Detail X 05/09 - 5 Construction subject to change. Version: 20.09.2019 No return possible!

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Ceiling diffuser 4DF Technical data Pressure loss and noise level Supply air with plenum box Construction subject to change.

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Ceiling diffuser 4DF Return air with plenum box Damper position OPEN in % 4DF-A-310-... with SK-Q-07-A-... 05/09 - 7 Construction subject to change. Version: 20.09.2019 No return possible!

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Ceiling diffuser 4DF Maximum end velocity of jet with plenum box 4DF-Z-400-... 05/09 - 8 Construction subject to change. Version: 20.09.2019 No return possible!

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Ceiling diffuser 4DF Critical throw 4DF-Z-400-... 05/09 - 9 Construction subject to change. Version: 20.09.2019 No return possible!

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Induction ratios Temperature ratios Legend Vzu (m3/h) Vzu [l/s] Vab (m3/h) Vab [l/s] Apt (Pa) Lwa [dB(A)] P (kg/m3) vmax (m/s) v (m/s) x+y (m) Xkr (m) ATo (K) tzu (K) tR (K) i (-) tv (-) NW (mm) ATx (K) Vx (m3/h) Supply air volume Supply air volume Return air volume Return air volume Pressure loss A-weighted sound power level Density Maximum end velocity of jet Average end velocity of jet (v = vmax x 0.5) Horizontal + vertical throw Critical jet path Temperature difference between supply air temperature and room temperature (aTo = tZU - tR) Supply air temperature Room temperature Induction...

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Ceiling diffuser 4DF Order details 4DF 01 Sample 4DF-Z-500-SB-9010-VM Ceiling diffuser type 4DF I supply air I NW500 I faceplate made of sheet steel I faceplate painted to RAL9010 I concealed mounting Order details 01 - Type 4DF = Ceiling diffuser 02 - Air throw Z = Supply air A = Return air 03 - Nominal size 310 = NW310 400 = NW400 500 = NW500 600 = NW600 625 = NW625 04 - Material SB = Sheet steel (standard) AL = Aluminium (only available with VM) 05 - Paint 9010 = RAL colour white (standard) xxxx = RAL colour can be freely selected ELOX = Natural colour anodised (only for AL) 06 -...

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Ceiling diffuser 4DF Order details SK 01 Sample SK-Q-07-Z-500-VM-SV-DK1-GD1-VME1-ROB0-I0-KHS-SDS-S1 Plenum box, square design I for square air diffusers I ceiling diffuser 4DF I supply air I NW500 I with concealed mounting I galvanised sheet steel I with damper I with rubber lip seal I with volumetric flow meter I without ROB model I without box insulation I standard height of plenum box I standard spigot diameter I 1 lateral spigot Order details 01 - Plenum box 07 - Material SK = Plenum box, square design SV = Galvanised sheet steel (standard) 02 - Model Q = for square air diffusers 03 -...

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Ceiling diffuser 4DF 13 - Height of plenum box KHS = Height of plenum box standard xxx = Height of plenum box in mm (Heightmin = spigot diameter +102 mm, but at least 200 mm) 14 - Spigot diameter SDS = Standard spigot diameter xxx = Spigot diameter in mm 15 - Spigot position S0 = Spigot from above S1 = 1 lateral spigot on the box (standard) S2 = 2 spigots offset by 90° S3 = 2 spigots offset by 180° S5 = 2 spigots arranged next to each other Specification texts Ceiling diffuser type 4DF for supply and return air, horizontal throw in 4 directions. Particularly suitable for installation in...

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