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DIRVARIZON® Displacement unit with adjustable spread pattern

Quick facts ► Adjustable spread pattern and affected area

► Suitable for all types of rooms

► Simple to install

► Cleanable

► Concealed fastening

► Available in alternative colors

Quick guideA I R F L O W – S O U N D L E V E L

DIRCubic Feet per Minute

25 NC 30 NC 35 NC

400 80 90 105

500 110 125 146

600 140 160 180

900 260 310 340

The sound data applies to the displacement unit together with the connection duct.

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DIR

Technical descriptionDesign The DIR is a complete, fl at displacement unit for mount-ing recessed into studded walls. The unit consists of a two parts: the plenum box and the perforated front plate. The plenum box is equipped with an air volume measuring point, or mounting frame and a rectangular connection spigot. The telescopic mounting frame has a distribution plate which is equipped with a number of adjustable defl ectors. This plate is removable for access to the duct system. The perforated front plate is fastened to the mounting frame.

Materials and surface treatment The displacement unit is manufactured in galvanized sheet steel and is powder coated with our pure white standard paint, RAL 9010. The unit is also available in other standard colours: Dusty grey 7037, white aluminum RAL 9006, jet black RAL 9005, grey aluminum RAL 9007 and signal white RAL 9003 (NCS 0500).

Customization In addition to the standard sizes, DIR displacement unit is available in special dimensions, with reinforced front panels etc. Please contact your nearest sales representative for further information.

Accessories Connection duct, DIRT 4. A rectangular connection duct with a circular duct connection and a rubber seal. The con-nection duct is telescopic by 12" high.

Planning It is possible to modify the affected area by adjusting the defl ectors behind the perforated front plate. This does not affect the air fl ow, pressure drop or sound level. This fl exibility simplifi es any future changes in the furnishing of the room etc.

The wall studs should be at least 2¾" thick to provide enough space for the displacement unit. This is increased to 3¾" for the DIR 900 model.

Installation The plenum box is mounted before the wall board is installed. The plenum box is screwed into place through the sides. The hole for the connection sleeve inlet is cut as illustrated in the diagram. The wall board is then fi xed in place, the mounting frame pushed inside the displacement unit and fi xed using screws. Finally the front panel is hung in place on the mounting frame. See fi gure 1.

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DIR

Figure 1. Installation.

Figure 2. Commissioning. Maintenance.CommissioningThe measurement outlet is on the lower edge of the displacement unit. The k-factor of the unit is stated in the product label, and can also be found on our website in the relevant k-factor guide.

It is recommended that a measurement unit and commis-sioning damper is used to regulate the air flow. It should be placed before the inlet of the connection duct. See figure 2.

Technical data• Sound level NC applies to a room attenuation of 4 dB.

• Maximum recommended temperature difference is -10 °F.

• To calculate the width of the spread pattern, air veloci-ties in the zone of occupation or sound levels in rooms with other dimensions, please refer to our calculation software, ProAir web, available for download at www.swegon.com.

MaintenanceThe displacement unit can be cleaned using luke warm water with detergent added. The duct system is accessed by removing the perforated front plate and the distribution plate. See figure 2.

4Swegon reserves the right to alter specifi cations. 20130425 www.swegon.com

DIR

40

40

in WGTotal pressure

30 40 50 100 200 3000.02

0.030.040.05

0.1

0.2

0.30.40.5

1

20

2530

3540 NC

2 3 4 5 10

1 2 3 4 5t -5 °F∆Affected area at

FPM40a

FPM40b

CFM

in WGTotal pressure

40 50 100 200 300 4000.02

0.030.040.05

0.1

0.2

0.30.40.5

1

20

2530

3540 NC

2 3 4 5 10

1 2 3 4 5t -5° F∆Affected area at

CFM

FPM40a

FPM40b

DIR 400 DIR 500

in WGTotal pressure

50 100 200 300 400

0.02

0.030.040.05

0.1

0.2

0.30.40.5

2025

3035

40 NC

2 3 4 5 10

1 2 3 4 5t -5° F∆Affected area at

CFM

FPM40a

FPM40b

inWGTotal pressure

100 200 300 400 500 CFM 1000

0.02

0.030.040.05

0.1

0.2

0.30.40.5

2025

3035

40 NC

3 4 5 10 20

3 4 5 10 20

F40a

F40b

t -5° F∆Affected area at

DIR 600 DIR 900

Engineering graphs Air fl ow – Pressure drop – Sound level – Affected area • Sound level NC applies to a room attenuation of 4 dB .

• Maximum recommended temperature difference is -10 °F .

• The air velocity is measured with the displacement unit 20" above fl oor level.

• The affected area refers to the distance to the isovel limit of 40 FPM at ∆t -5 °F. In this case, ∆t signifi es the differ-ence between the room air temperature and the supply air temperature, measured at 4 ft above fl oor level. It does not refer to the difference between the extract air and the supply air temperatures.

• The graphs are not to be used for commissioning.

• ∇ = min air fl ow to obtain suffi cient commissioning pressure. Figure 3. Affected area.

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DIR

Dimensions and weightsDIR Dimensions (in) Weight (lbs)

Size*) A B C D E F G ØH J K L M N Unit Duct

400 15.83 13.58 9.84 15.83 13.58 1.97 3.15 3.90 2.83 3.15-4.02 10.00 9.92 2.13 11.0 11.0

500 19.76 17.52 11.81 19.76 17.52 1.97 3.15 4.88 3.39 3.15-4.02 11.97 11.89 2.13 17.6 15.4

600 23.70 21.46 13.78 23.70 21.46 1.97 3.15 6.26 4.13 3.15-4.02 13.94 13.86 2.13 22.0 22.0

900 23.70 21.46 19.68 35.51 33.27 2.76 3.94 7.83 4.92 3.94-4.80 19.84 19.76 2.91 33.0 26.4*) The unit of the size column is in millimeters and should be primaraly considered as a denomination when referring to products or placing orders. Corresponding measurements in inches can be seen in the A and D columns.

1.18 - 2.05”

13.8”

0.47”

78.7”

Figure 4. Flush mounting measurements for the DIR.1. Front panel2. Connection sleeve3. Commissioning box4. Fixing frame

Figure 5. DIR and DIRT 4.

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Ordering keyProduct

Flush-mounted displacement unit DIR c -aaa

Version:

Size (mm): 400, 500, 600, 900

Accessories

Connection duct DIRT 4 a -aaa

Version:

Size (mm): 400, 500, 600, 900

Specification example

SD XX Swegons VARIZON® rectangular low velocity terminal for flush mounting in walls, of type DIR, with the following functions.

• Adjustable spread pattern and affected area

• Air volume measuring point

• Cleanable

• Telescopic mounting frame

• Telescopic connection duct

• Powder coated in white, RAL 9010

Accessories:

Connection duct: DIRT 4 a -aaa xx items

Size: DIR c -aaa xx items