PROCONDIF® – Diffuser Type PCD

Contents · Introduction · The method · Safety instructions · Application Contents Introduction · The method · Safety instructions · Applications _________________________________ 2 Execution · Dimensions ___________________ 3 and 5 Installation ______________________________4 and 6 Quick selection ________________________ 8 and 10 _ Technical Data ____________________________ 7–11 Order details _______________________________ 12 _ Introduction There are many applications in which displacement ventilation has not been accepted even though cooling loads are sufficiently low. Examples are department...

Execution · Dimensions Execution Type PCDQ The PCDQ diffuser consists of a metal frame and a honeycomb wafer shaping the air outflow. The channels of the filigree honeycomb structure straighten efficiently air streams in a similar way as in the wellknown rotary heatwheels. The profiling of outlet velocity is controlled with adjusted constrictions in the fine channels. Their slope is set at an angle of about 30º degree to prevent the Coanda effect (which occurs only in the heating mode). Air is blown out across the entire section of the wafer. The jets issuing from the individual honeycomb cells...

Installation Type PCDQ For grid dimensions 600 or 625 mm pressed onto the ceiling profile from below, with square plenum box according. Type PCDQ For grid dimensions 600 or 625 mm inserted in the ceiling profile from above, with square plenum Rastermass Typ NW box. K Anschlusskasten Details siehe Prospekt M L-04-1-31d (TROX HESCO) oder 2/16.4/… (TROX) Type AKH04 ZL M0 (TROX HESCO) Plenum box Details see prospect L-04-1-31e (TROX HESCO) or 2/16.4/… (TROX) Caisson de raccordement Détails voir prospectus L-04-1-31f (TROX HESCO) ou 2/16.4/… (TROX)

Execution · Dimensions Execution Type PCDR for visual realisation The PCDR diffuser consists of a metal frame and a honeycomb wafer shaping the air outflow. The channels of the filigree honeycomb structure straighten efficiently air streams in a similar way as in the well-known rotary heat wheels. The profiling of outlet velocity is controlled with adjusted constrictions in the fine channels. Air is blown out across the entire section of the wafer. The jets issuing from the individual honeycomb cells are not constricted at the outlet, as in the case of nozzles or perforated panels. The outflow...

Type PCDR Application for visual realisation, for direct duct plenum, without false ceiling.

Technical Data Symbols Room height Min. distance to the residence zone Room temperature outside the air jet Distance center of the diffuser until the wall Distance until final velocity ~0.2 m/s Radius until final velocity ~0.2 m/s, free jet Air temperature at floor level outside the air jet Volume flow rate (nominal) m³/h, l/s Installation examples Office Laboratory, Industry

Quick selection Facteur de correction Détermination de la différence de la température Type PCDQ 0.0 Hauteur du local 2.5 - 5.0 m [K] Pressur drop incl. plenum box Sound power level Volumen flow rate Temperature difference tZL - tR max. jet velocity Room height Room height Room height Room height Room height Determination of r0.2 125 f Correction factor ∆LA Toleranz ±4 ±3 Determination of the temperature difference f 125 Volume flow rate is too small ∆LA Tolérance Correction table, octave-centre frequencies

Technical Data Application example Type PCDQ, for office Given – PCDQ... – Room height RH – Volume flow rate (nominal) ‡ Difference of temperature tZL - tR = 20°C – 24°C = Distance to the wall x Solution Pressure drop ∆ps Sound power level LwA Max. velocity of the jet vmax 0.38 m/s Jet radius r Jet zone: fkorr = 1.7 r0.2 = fkorr × r = 1.7 × 0.9 d0.2 = 1.5 × r0.2 = 1.5 × 1.5 Distance D = x + d0.2 = 0.3 + 2.3 Difference of temperature tR – tB = Octave spectrum

Quick selection Type PCDR nominal ‡ Static pressur drop Sound power level straight blowing Ø315 Volumen flow rate Temperature difference tZL - tR max. jet velocity Distance floor - PCDR Distance floor - PCDR Distance floor - PCDR Distance floor - PCDR Distance floor - PCDR Correction factor Determination of the temperature difference 0.0 f 125 250 Correction values for plenum box ∆LA -10 -2 ∆LA Toleranz Tolérance ±4 ±3 ±2 Correction table, octave-centre frequencies Distance floor - PCDR 2.5 - 5.0 m

Technical Data Application example Type PCDR, for Laboratory/Industry Given – PCDR Ø725×315 (90° bend) – Distance between floor and diffuser PCDR – Volume flow rate (nominal) ‡ Solution Connecting with 90° bend Ø315 Pressure drop ∆ps = 26 × 1.1 = Sound power level LwA = 37 + 1 = Max. velocity of the jet vmax 0.38 m/s Jet radius r Jet zone: fkorr = 1.7 r0,2 = fkorr × r = 1.7 × 1.01 Octave spectrum

Order details Order codes No details for standard products PCD Type ProConDif Q = square R = circular external dimension × active surface external dimension × connection diameter 0 = without plenum box AKH04 = TROX HESCO plenum box for (only for type PCDQ) ZL = Supply air Only for type PCDQ M0 = Spigot with volume control, without lip seal (standard) ML = Spigot with volume control, with lip seal 00 = Spigot without volume control, without lip seal 0L = Spigot without volume control, with lip seal 0 = Type PCDQ: Front steel plate, powder coated according to RAL 9010, matt, 25% brilliance (standard)...