CDH/CLHCleanZone – 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 9003

- 5 alternative standard colours

- Other colours upon request

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

CDH/CLH

Size

Air flow Pressure drop Sound level

Type l/s m3/h Δp Pa LA dB(A)

33-160-1Perf. 41 148 150

170

<15

<20Discs 41 148

66-315-1Perf. 162 583 150

170

<15

35Discs 162 583

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.

CDH/CLH

2Swegon reserves the right to alter specifications. 20190318

Technical descriptionDesignThe 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 connec-tion 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 treatmentThe 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 9010.

AccessoriesFilter: Micro-filter H14 with gel seal or rubber gel Separation efficiency: 99.995% @ MMPS, EN 1822. Sizes, nominal dimensions 610 x 610 or 305 x 305 mm

PlanningThe air velocity over the filter must not exceed 0.58 m/s (nom. flow 0.45 +30%), 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 sus-pending 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 installa-tion, 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.

MaintenanceThe diffuser should be cleaned when necessary or routi-nely 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.

EnvironmentThe Declaration of construction materials is available at www.swegon.com.

CommissioningThe diffuser is not equipped with a commissioning damper. It is recommended that the ducts before the dif-fuser are provided with some sort of commissioning.

320190318 Swegon reserves the right to alter specifications.

CDH/CLH

Figure 1. Mounting. A = Perforated diffuser plate B = Diffuser plate with discs.

Figure 3. Mounting of filter CLH.

Figure 2. Mounting of filter CDH.

Sizing• Sound level dB(A) applies to rooms of 10 m2 equivalent

absorption area.

• Throw l0.2 is measured with isothermal air supply.

Sound dataSound power level Lw(dB) Table KOK

Size Mid-frequency (octave band) Hz

63 125 250 500 1000 2000 4000 8000

33-160-1-1 2 0 -1 0 1 -4 -12 -16

33-160-1-2 1 4 8 3 -2 -13 -19 -17

33-300-100-2-1 2 -4 -1 -2 0 -2 -7 -8

33-300-100-2-2 -6 5 8 2 -2 -12 -17 -17

66-315-1-1 1 0 0 1 0 -5 -8 -10

66-315-1-2 4 8 7 3 -3 -15 -19 -15

66-600-100-2-1 -2 -1 -1 1 0 -5 -8 -8

66-600-100-2-2 -4 8 7 3 -3 -14 -13 -17

Tol. ± 2 2 2 2 2 2 2 2

Sound attenuation ΔL (dB), incl. end reflection Table ΔL

Size Mid-frequency (octave band) Hz

63 125 250 500 1000 2000 4000 8000

33-160-1-1 19 15 6 4 8 6 9 10

33-160-1-2 21 15 6 4 8 6 9 10

33-300-100-2-1 18 13 9 8 8 13 14 16

33-300-100-2-2 18 13 9 8 8 13 14 16

66-315-1-1 15 9 2 4 4 6 7 11

66-315-1-2 15 9 2 4 4 6 7 11

66-600-100-2-1 14 9 7 6 7 11 12 18

66-600-100-2-2 14 9 7 6 7 11 12 18

Tol. ± 2 2 2 2 2 2 2 2

CDH/CLH

4Swegon reserves the right to alter specifications. 20190318

Air velocity in occupied zone• The graph shows the highest average velocity in the

occupied zone at Δt 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.

33-160-1-2, With discs33-160-1-1, Perforated

520190318 Swegon reserves the right to alter specifications.

CDH/CLH

66-315-1-1, Perforated

33-300-100-2-1, Perforated 33-300-100-2-2, With discs

66-315-1-2, With discs

66-600-100-2-1, Perforated 66 600-100-2-2, With discs

CDH/CLH

6Swegon reserves the right to alter specifications. 20190318

Example disc settings

Dimensions and weightsCircular connection

SizeDimensions (mm)

Weight*) (kg)A B ØD L N

33-160 390 339 159 130 320 8,1

66-315 693 642 314 130 475 18,0

*) Incl. filter

L

A

B

N

Figure 4. CDH/CLH, circular connection.

Rectangular connection

SizeDimensions (mm) wt.*)

(kg)A C x D E x F G H B1

33-300x100 390 360x160 300x100 130 339 290 9,0

66-600x100 693 660x160 600x100 130 642 290 19,5

*) Incl. filter

35

A

E

C

35

G

H

B1

D F

Figure 5. CDH/CLH, rectangular connection.

Filter dimensions

Size Length x Width x Height (mm)

Circular Rectangular CDH CLH

33-160 33-300x100 305 x 305 x 69 305 x 305 x 80

66-315 66-600x100 610 x 610 x 69 610 x 610 x 80

Figure 6. Standard disc setting. Diffuser with discs. 1. Rotation 2. V1 Vertical conc. 3. V2 Vertical diff. 4. 4-way (Standard) 5. 3-way 6. 2M-way 7. 2C-way 8. 1-way

Number of discs for diffuser faces with discsSize

Number of discsCircular Rectangular

33-160 33-300x100 25

66-315 66-600x100 64

720190318 Swegon reserves the right to alter specifications.

CDH/CLH

Specification exampleQGB/1, H14 Swegons ceiling module with micro-filter and disc or per-forated 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 µm

• Measurement point for vapour test and pressure mea-surement through filter

• Painted on exterior and interior

• Full disassembly possible for cleaning

• Powder coated in white

Size CLHb aa - bbb - ccc - d - 1 xx items

CLHb aa - bbb - ccc - d - 2 xx items

Order keyProduct

Supply air diff. with rubber-sealed micro-filter

CDH b -aa -bbb(ccc) -d -e

Version:

Nom. square dimension cm; 33, 66

Nominal connection dimension (See table "standard range")

Connection type Circular = 1 Rectangular = 2 (See table "standard range")

Type of diffuser plate 1 = Perforated 2 = With discs

Supply air diff. with gel-sealed micro-filter

CLH b -aa -bbb(ccc) -d -e

Version:

Nom. square dimension cm; 33, 66

Nominal connection dimension (See table "standard range")

Connection type Circular = 1 Rectangular = 2 (See table "standard range")

Type of diffuser plate 1 = Perforated 2 = With discs

Standard range

CDH:

CLH:

33-160-1- 1 or 2 33-300-100-2- 1 or 2 66-315-1- 1 or 2 66-600-100-2- 1 or 2 33-160-1- 1 or 2 33-300-100-2- 1 or 2 66-315-1- 1 or 2 66-600-100-2- 1 or 2