Linear Slot Diffuser

8/8/2019 Linear Slot Diffuser

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Ul

Rill ES O

L IN E R S L O T

IF F U S E R S


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LINE R SLOT SUPPLY IR DIFFUSER

LINE R SLOT DIFFUSER WITH DEFLECTION BL DES

ND VOLUME CONTROL D MPER

• • A t

PRODUCT DESCRIPTION

• The linear slot diffuser with deflection blades and

control damper is constructed of extruded

aluminium alloy and are polyester powder coated

finish.

• The fully adjustable deflection blades allow for the air

pattern to be controlled along the ceiling straight

down or at some intermediate setting.

• The deflecting blades are designed so that when in

the closed position the air pressure tends to

form a tight seal.

• The slots are available in 3/4 or 1 width.

• The air flow rate can be varied without changing the

air pattern by the use of the volume control damper

attached to the rear side of the diffuser.

Listed Sizes

3/4 Slot Width

• The volume control damper consists of two strips of

extruded aluminium one fixed and one movable.

• They both have 5/8 x 7/8 rectangular holes on

1-3/4 center for 3/4 and 1 slot opening.

• By offsetting the holes the air flow rate can be reduced.

• Damper works also as equalizing grid.

• Maximum length supplied - 10 feet.

• Standard finish is white calor for slot diffuser and

deflection blades. Damper in black calor. Painted

under electrostatic polyester powder coated system.

Other colors available on request. The polyester

powder of highest quality are used to enhance the

appearance of the units.

No. of

Slots

1 2

3 4

5

6

7

8

A in. 1.65 2.99

4.33

5.67 7.01

8.35

9.65 10.94

B in. 1.42 2.76 4.09 5.43 6.81 8.15 9.41 10.71

C in. 3.31 4.61

5.94

7.28

8.58 9.96 11.38

12.64

CFM/FT 10-100

20-125

30-150

40-200

50-250

60-300 70-350 80-400

1 Slot Width

No. of

1 2 3

4

5

6

7

8

Slots

A in.

1.94

3.58

5.23

6.88

8.52

10.17 11.81

13.46

B in.

1.70

3.35 4.99 6.64

8.28 9.93 11.58 13.22

C in.

3.48

5.13

6.77

8.42

10.06 11.71

13.36 15.00

CFM/FT

10-100 20-125 30-150 40-200

50-250 60-300 70-350

80-400

7


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L S A

LINE R SLOT RETURN IR DIFFUSER

LINE R SLOT DIFFUSER WITH DEFLECTION BL DES

ND WITHOUT VOLUME CONTROL D MPER

-I

I

B

- I

r

PRODUCT DESCRIPTION

• The linear slot diffuser with deflection blades is

constructed of extruded aluminium alloy and are

polyester powder coated finish.

• The slots are available in 3/4 or 1 width.


• The fully adjustable deflection blades allow for the air

p.attern to be controlled along the ceiling straight

down or at some intermediate setting.

• The deflecting blades are designed so that when in

the closed position the air pressure tends to form a

tight seal.

• Standard finish is white calor for slot diffuser and

deflection blades. Painted under electrostatic

polyester powder coated system. Other colors

available on request. The polyester powder of highest

quality are used to enhance the appearance of the

units.

Listed Sizes

3/4 Slot Width

No. of

6 7

8

Slots

1 2

3

4 5

A in.)

1 65

2 99

4 33 5 67 7 01 8 35 9 65 10 94

B in.)

1 42

2 76 4 09

5 43

6 81 8 15

9 41

10 71

C in.) 3 31

4 61 5 94 7 28 8 58 9 96 11 38 12 64

CFM/ft.

10 100

20 125 30 150

40 200 50 250

60 300

70 350 80 400

1 Slot Width

No. of

1 2

3

4 5 6

7

8

Slots

A in.)

1 94 3 58 5 23

6 88 8 52 10 17

11 81

13 46

B in.)

1 70

3 35

4 99 6 64 8 28

9 93 11 58

13 22

C in.)

3 48

5 13

6 77

8 42

10 06 11 71 13 36 15 00

CFM/ft.

10 100

20 125

30 150

40 200

50 250 60 300 70 350

80·400

7 2


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LINE R SLOT RETURN IR DIFFUSER

LINE R SLOT DIFFUSER WITHOUT DEFLECTION BL DES

ND WITH VOLUME CONTROL D MPER

------ A-------.1

2-3/8 I J-----;-I ---±__--____I'

[ : 1 1 / 4 1

c

J

PRODUCT DESCRIPTION

• The linear slot diffuser with volume control damper

and no deflection blades is constructed of extruded

aluminium alloy and are polyester powder coated

finish.

• They both have a series of 5/8 x 7/8 rectangular holes

on 1-3/4 center, for 3/4 and 1 slot opening.

• By offsetting the holes the airflow rate can be reduced.

• The air flow rate can be varied by the use of the volume

control damper attached to the rear side of the diffuser.


• The volume control damper consists of two strips of

extruded aluminium, one fixed and one movable.

• Standard finish is white color for slot diffuser. Damper

in black calor. Painted under electrostatic polyester

powder coated system. Other colors available on

request. The polyester powder of highest quality are

used to enhance the appearance of the units.

Listed Sizes

3/4 Slot Width

No. of

Slots

1 2

3

5

6

7 8

A in.) 1.65 2.99 4.33 5.67 7.01 8.35

9.65 10.94

B in.)

1.42

2.76 4.09 5.43 6.81 8.15

9.41

10.71

C in.) 3.31 4.61 5.94 7.28 8.58 9.96 11.38 12.64

CFM/FT.

10-100 20-125 30-150 40-200 50-250 60-300

70-350

80-400

1 Slot Width

No. of

1

2 3

4 5

6

7

8

Slots

A in.)

1.94

3.58

5.23 6.88 8.52

10.17

11.81

13.46

B in.) 1.70 3.35 4.99 6.64 8.28 9.93 11.58 13.22

C in)

3.48

5.13

6.77

8.42

10.06

11.71

13.36 15.00

CFM/FT.

10-100

20-125 30-150 40-200 50-250

60-300

70-350

80-400

7


5/15

END C P RR NGEMENTS

SLOT DIFFUSER WITHOUT END C P SLOT DIFFUSER WITH ONE END C P RIGHT OR

LEFT

I• • L = NOMINAL SIZE

1 L

NOMINAL SIZE

END C P BOTH ENDS

I

I

I

I

I ·

END CAP LEFT

1 1 ·

WITHOUTENDCAP

1 1 ·

END CAP RIGHT

I

7


6/15

ear Slot Supply Diffuser Featuring Fully Adjustable Deflection

a es. The Deflection Blades Provide Combinat ion Air Pattern Flow

ate Control and Blank Off.

Si gle Slot Ad justments

Horizontal Left

Horizontal Right

Fully Vertical

Fully Closed

Multiple Slot Adjustments Up to 8 Slots Wide

One Way

Opposed Imbalance

IMPORTANT NOTE:

In all air slot type diffusers constriction of free area by blade

relationships must be set carefully so as not to throttle airstream

with resultant increase in static pressure and noise level criteria.

It is recommended that care be exercised in setting blades to

prevent such excessive constriction of air passageway.

2 Way throw may be obtained by staggering each length

of deflection blades alternately from right to left.

Two Way

Vertical and Horizontal

7


7/15

MITERE ORNERS

SIDE W LL INSIDE CORNER

SIDE W LL OUTSIDE CORNER

...----- 11-13/16

. 11-13/16

--..

CEILING CORNER PIECES Available in one through eight slots

7-6


8/15

•

LINE R SLOT IR DIFFUSERS

ENGINEERING D T

Blade Settings

T e deflection blades of the supply slot linear

diffuser can be adjusted to give either a horizontal

or vertical air pattern. The horizontal air flow

adjustment may be set for either left or right hand

throw.

.• . .

/

I \

I \

I

/

.• .

.

Changing the blade setting also changes the

noise and total pressure.

Throw Data

All throw data is based on the results of tests of

4-feet length diffusers. To determine throws for

other diffuser lengths, use correction factors as

follows:

Diffuser Active Length(ft.

1

2 3

4

6-8

Throw Correction Factor 0.6 0.8 0.9

1.0 1.3

Sound Data

Sound data (NC values) shown in the Performance

Tables are based on a room absorption of 10dB,

re 10-

Watts and a 4-feet unit test length. To

determine NCvalues for other lengths, add NC value

to catalog data as follows:

Diffuser Active Length (ft.) 2

3

4

5

6-8

Add NC Value (dB) -3.0 -1.5

0

1.0 2.0

Select ion Procedure

The horizontal throw data is presented in the

performance data pages with all slots supplying air

in a given direction. To determine two-way throw,

use the catalog throw data for the desired quantity

of air from the number of slots in each direction

and reduce the throw by twenty percent.

Example

Determine the throw for an LS3-AD (3/4 Slot Width)

2 ft. long, 3-slot diffuser with 250 CFM in one

direction and 120 CFM in the other.

A. 250 CFM, 2 , 2-slots

125 CFM/ft

Catalog throws 31 - 37

Throws x 0.80 25 - 30

B. 120 CFM, 2 , t-slot

60-CFM/ft

Catalog throws 22 - 26

Throw x 0.80

18 - 21

rea Factor Summary

Slot

Number of

Horizontal Vertical Return

Width

Slots

1

0.073 0.121 0.123

2

0.135 0.180 0.184

3

0.201 0.237 0.242

3/4

4

0.265 0.295 0.301

5

0.330 0.355 0.362

6

0.395

0.413 0.421

7

0.455

0.470

0.479

8

0.520 0.530 0.539

1 0.088

0.184

0.188

2 0.162

0.274

0.281

3

0.241 0.360 0.367

1

4

0.318 0.448

0.457

5

0.396 0.540 0.551

6

0.474

0.628 0.641

7 0.546 0.714 0.732

8

0.631 0.806 0.822


9/15

SUPPLY LINEAR SLOT AIR DIFFUSERS

PERFORMANCE DATA

Model : LS3 AD

Linear Diffuser 3/4 Slot Width

No. 01

CFM/FT.

10 20

30

40

50 60 70 80 90 100 125 150

200 250

Slots

300

350

400

HOR.SP

.022

.089 .200 .356 .557 .802 1.092

1.426

. 1.804

2.228

THROW

7 10 13 15 15 19 18 21 20 24

22 26 23 28 25 30 27 32 28 33

NC

50 >50 >50

1

VERT. SP

.010 .039 .088 .353

.480

.627

.794

.. 980

157 .245

THROW

2 5 9 15 16 23 22 27 25 30 27 32 29 35 31 37 33 39 35 42

NC


10/15

SUPPLY LINEAR SLOT AIR DIFFUSERS

PERFORMANCE DATA

Model : LS3 AD

Linear Diffuser 1 Slot Width

No cl

CFM/FT.

10 20 30 40 50 60 70 80 90 100 125 150 200 250 300 350 400

S ols

HOR. SP

010 040 090 160 250 360

490

640 810 1 000

THROW

4 8 10 15 15 19 18 21 20·24 22·26 23 28

25·30

27 32 28 33

NC

50

>50 >50

1

VERT. SP

007 029 066

117

183 263 358

468

592 731

THROW

2 4

8·15

16 22 21 27 25·29 27·32

29·35

31·37 33 39 35·42

NC


11/15

RETURN LINEAR SLOT AIR DIFFUSERS

PERFORMANCE DATA

Model : LS

Linear slot diffuser with deflection blades and without volume control damper 3/4 Slot Width).

o. of

Negative SP 005 022

048 086 133 196

270

354

Slots

1

CFM/Foot

10 20 30

40

50

60

70

80

NC

50

CFM/Foot 80 160 240 320 400

480

560 640

8

NC

50 >50 >50 >50 >50

• NC Data based on 1OdB room attenuation.

• Static Pressure SP) in inches w.g.

7 1


12/15

RETURN LINEAR SLOT AIR DIFFUSERS

PERFORMANCE DATA

Model : LS3

Linear slot diffuser with deflection blades and without volume control damper 1 Slot Width).

o. of

Negative SP

16 34

55 86 123

16 1 2 5

35 4

Slots

1

CFM/Foot

2

3

4

5

6 7 8 1

NC


13/15

L NCING O T

Supply Air Testing

Step 1 : Place an Alnor jet 2220A as per sketch, and take velocity

readings at frequent intervals along one slot of a group of

slots having the same blade settings.

Take readings at approximately 6 from end and at 1 foot

intervals, being careful to avoid readings directly below

spacer bars which are at 18 intervals. Take atleast four

readings on units under 4 feet long.

Average the readings to obtain Average Velocity Vk).

Step 2 : From table select the Ak for number of slots which have the

same blade settings.

Step 3 : Determine L as the length in feet of the section of slots having

the same settings.

Step 4 : Calculate CFM.

a. For Horizontal

Measure Vk on the side of slot as shown in Fig 1).

Take Ak from table.

Total CFM Ak x Vk x L.

b. For Vertical

Measure Vk on one side of the slot as shown in Fig 2).

Take Ak from table.

Total CFM Ak x Vk x L.

Return Air Testing

Measure Vk in the open side of the slot as shown in Fig 3).

Take Ak from table.

Total CFM

Ak x Vk x L.

AIR FLOW

Fig. 1)

AIR FLOW

Fig. 2)

AIR FLOW

Fig. 3)

7 2


14/15

INSTALLATION DETAILS

Duct Width

1/16

-0

B

I

1 5/8

J

0 3/8

Ceiling Opening

C

Ceil ing Opening for 3 4 Slot Width

No_ of

3

6

Slots

1

2

4

5

7

8

A in.

1 65 2 99

4 33

5 67

7 1

8 35 9 65

1 94

B in.

1 42

2 76 4 9 5 43 6 81 8 15

9 41

1 71

in. 3 31 4 61 5 94 7 28 8 58 9 96 11 38 12 64

D in. 2 28 3 62 4 95 6 29 7 67 9 1 1 27 11 57

Cei li ng Open ing for 1 Slot Width

No. of

1 2 3 4 5 6 7

8

Slots

in.

1 94 3 58 5 23 6 88 8 52 1 17 11 81

13 46

B in.

1 7 3 35 4 99 6 64 8 28 9 93 11 58

13 22

in.

3 48

5 13

6 77

8 42

1 6

11 71

13 36 15

D in.

2 57

4 21 5 86 7 5

9 15 1 8 12 44

14 9

7 13


15/15

LINEAR SLOT DIFFUSERS

E GINEERING CALCULATION

R - Radius up to grille inside. R

GRILLE S SEGMENT

h

L

180

_ m m _ m _ . m m m m m m · · · · · F = = · R m m . m . m

Semi-Circular Grille; Arch Length

=

11x R.

Grille Arch Length. AIL .

AIL

=

e x 11/180 x R

e

Angle, R - Radius

h

=

Segment Height.

R 1 - COS 9/2».

L

=

Segment Length.

2 x R x SIN 9/2».

Full-Circular Grille; Arch Length 2 x 11x R.

NOT S

• All Curved Linear Slot Diffusers are ceiling mount.

• The least radius of curvature is 1.5 meters.

• Hit miss damper for above diffusers will not be provided.

Full function of deflector (pattern controllers) may not be obtained

in above diffusers.

Linear Slot Diffuser

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