CDH/CLH. CleanZone Ceiling diffuser with micro-filter for supply air in clean rooms QUICK FACTS

Transcription

1 CleanZone Ceiling diffuser with micro-filter for supply air in clean rooms QUICK FACTS Rectangular or circular duct connection Equipped with micro-filter H14 with gel or dry seal Painted interior Measurement outlet for dip test and pressure above filter Perforated or disc diffuser face Standard colour White RAL alternative standard colours -- Other colours upon request CDH/CLH A I R F L O W - P R E S S U R E D R O P - S O U N D L E V E L Velocity over the filter at 0,45 m/s Air flow Pressure drop Sound level Type l/s m 3 /h Δp Pa L A db(a) Perf Discs Perf Discs <15 <20 Recommended upper limit for air flow is equivalent to 0.7 m/s over the nominal gross area of filter. Data applies to 4-way horizontal spread pattern. <15 35

2 Technical description Design The CDH/CLH is a supply air diffuser for ceiling installation, equipped with an micro-filter. It consists primarily of two parts: the filter box and the diffuser unit. The filter box, which contains the filter, has a horizontal circular connection spigot which is aerodynamically shaped. A horizontal rectangular connection may be selected as an alternative. The filter is available in two versions: with a gel seal (CLH) or with a rubber seal, known as a dry seal (CDH). The diffuser section is available in two versions: either with a perforated face or equipped with aerodynamically shaped discs. The unit has a measurement outlet for dip testing and measuring the pressure over the filter. Materials and surface treatment The unit is manufactured in sheet steel and painted on the exterior and interior with our pure white standard paint, RAL 9003/NCS S 0500-N. The unit is also available in other standard colours: Dusty grey 7037, white aluminium RAL 9006, jet black RAL 9005, grey aluminium RAL 9007 and white RAL Accessories Filter: Micro-filter H14 with gel seal or rubber gel Separation efficiency: MMPS, EN s, nominal dimensions 610 x 610 or 305 x 305 mm Planning The air velocity over the filter must not exceed 0.58 m/s (nom. flow %), calculated over the gross area of the filter. This limit is set to ensure the separation efficiency of the filter, i.e. H14 class. Installation The diffuser is equipped with four steel brackets for suspending the unit from the ceiling. It is very important that the diffuser is installed exactly horizontally (±1,0 mm) to ensure the function of the gel-seal. The rectangular duct connection is of a flange design. Subsequent to installation, the duct connections must be sealed on the outside with jointing compound. When the diffuser is installed in a ceiling the covering flange must be sealed in place in the suspended ceiling. See figure 1. Mounting of filters, see Figure 2 and Figure 3. Commissioning The diffuser is not equipped with a commissioning damper. It is recommended that the ducts before the diffuser are provided with some sort of commissioning. Maintenance The diffuser should be cleaned when necessary or routinely using either lukewarm water with detergent added or alcohol. The filter is changed by unclipping the spring clips on the diffuser section. The attachments on the filter are removed and the filter can be lowered from the main diffuser. Recommended final pressure drop 600 Pa at 0.45 m/s according to EN 1822:H14 standard. If required it is possible to refill gel in the groove. Environment The Declaration of construction materials is available at 2 Swegon reserves the right to alter specifications

3 Figure 2. Mounting of filter CDH. Figure 1. Mounting. A = Perforated diffuser plate B = Diffuser plate with discs. Figure 3. Mounting of filter CLH. Sizing Sound level db(a) applies to rooms of 10 m 2 equivalent absorption area. Throw l 0.2 is measured with isothermal air supply. Sound data Sound power level L w (db) Table K OK Mid-frequency (octave band) Hz Tol. ± Sound attenuation DL (db), incl. end reflection Table DL Mid-frequency (octave band) Hz Tol. ± Swegon reserves the right to alter specifications. 3

4 Air velocity in occupied zone The graph shows the highest average velocity in the occupied zone at Dt 6 C. The graph is valid for one diffuser and the measuring point is right undermeath the diffuser. For CDH/CLH the air velocity must never exceed 0.2 m/s in the normal operating area. (1) Distance from the ceiling (2) Air velocity m/s Engineering graphs Supply air Air flow Pressure drop Sound level Throw The graphs must not be used for commissioning. The db(a) value is for rooms with normal acoustic absorption (4 db). The db(c) value is normally 6-9 db higher than the db(a) value , Perforated , With discs 4 Swegon reserves the right to alter specifications

5 , Perforated , With discs , Perforated , With discs , Perforated , With discs Swegon reserves the right to alter specifications. 5

6 Dimensions and weights Circular connection Dimensions (mm) A B ØD L N Weight *) (kg) , ,0 *) Incl. filter Number of discs for diffuser faces with discs Circular Rectangular Number of discs x x B Example disc settings L N A Figure 4. CDH/CLH, circular connection. Rectangular connection Dimensions (mm) wt. *) A C x D E x F G H B1 (kg) x x x , x x x ,5 *) Incl. filter D F C E H G B1 Figure 6. Standard disc setting. Diffuser with discs. 1. Rotation 2. V1 Vertical conc. 3. V2 Vertical diff way (Standard) 5. 3-way 6. 2M-way 7. 2C-way 8. 1-way A Figure 5. CDH/CLH, rectangular connection. Filter dimensions Length x Width x Height (mm) Circular Rectangular CDH CLH x x 305 x x 305 x x x 610 x x 610 x 80 6 Swegon reserves the right to alter specifications

7 Order key Product Supply air diff. with rubber-sealed micro-filter Version: Nom. square dimension cm; 33, 66 Nominal connection dimension Connection type Circular = 1 Rectangular = 2 Type of diffuser plate 1 = Perforated 2 = With discs Supply air diff. with gel-sealed micro-filter Version: Nom. square dimension cm; 33, 66 Nominal connection dimension Connection type Circular = 1 Rectangular = 2 Type of diffuser plate 1 = Perforated 2 = With discs CDH b -aa -bbb(ccc) -d -e CLH b -aa -bbb(ccc) -d -e Specification example SD XX Swegons ceiling module with micro-filter and disc or perforated diffuser face of type CDH/CLH, designed for use in clean rooms, having the following functions: Micro-filter with gel seal or rubber gel Filtration efficiency 99.99% of particle size down to 0.3 mm Measurement point for vapour test and pressure measurement through filter Painted on exterior and interior Full disassembly possible for cleaning Powder coated in white CLHb aa - bbb - ccc - d - 1 xx items CLHb aa - bbb - ccc - d - 2 xx items Standard range CDH: or or or or 2 CLH: or or or or Swegon reserves the right to alter specifications. 7