Systemair BIA Data Sheet

Air Distribution Products

BIA

Adjustable Displacement Diffuser

Data Sheet

2 / 12 | Variable Geometry Diffusers

Description

BIA is a variable geometry displacement/induction hybrid diffuser, mainly intended for air supply in comfort ventilation systems for industrial-, ofce- and public halls.

Highlights

• Compact dimensions

• Precise adjustment of different discharge patterns

for heated and cooled air

• Pressure drop independent from the air discharge

mode adjustment

• Manual or motorized adjustment versions

• Easy and quick installation in elevation 0 m to 5 m

Product Types

• BIA-...-HC: Variable geometry displacement/induction

hybrid diffuser with manual geometry adjustment

• BIA-...-MC: Variable geometry displacement/induction

hybrid diffuser with continuous actuator for geometry adjustment

Fig. 1: Air ow visualisation Left: vertical discharge, heating mode Right: horizontal discharge, cooling mode

4 / 12 | Variable Geometry Diffusers

Design

The diffuser casing is made from galvanized perforated steel sheet. A version with the casing from satin nish

stainless steel is also available for better protection in case of water condensation in spaces with higher humidity.

The air inlet with rubber gasket ts to the standard circular spiral ducts. The upper part with vertical slit perforation

permits the air discharge in vertical direction with higher face velocity (induction mode). The lower part with perforation of circular holes permits the air in displacement discharge mode. The internal mechanism adjusts the ratio between the induction and displacement air discharge. The positioning of the mechanism can be manual or with electrical (AC 24 V) continuously positioning (DC 0 V … 10 V) actuator. The manual adjustment is possible over longer distance by a rope bound to the adjustment pull chain, when the diffuser is installed in higher elevation. The pull chain reaches app. 200 mm under the bottom of the casing. The mechanism assures pressure drop independent from the adjusted position.

Controls

The diffuser type BIA-…-MC ais equipped by an actuator with AC 24 V power supply and continuous positioning by the control signal DC 0 V …10 V.

Information about installation, maintenance and operation is available in the “UserManual_BIA” document on

Systemair DESIGN.

Product Parts

Fig. 2: Components of BIA

4

1

2

3

6

5

Legend

1 Connection for spiral duct with rubber gasket

2 Perforation for vertical induction discharge

3 Perforation for horizontal displacement discharge

Platform with adjustment handle (BIA-...-HC)

4

or adjustment actuator (BIA-...-MC)

Pull chain for manual adjustment (BIA-...-HC),

5

reaches app. 200 mm lower than the casing bottom

6 Position arresting holder for manual adjustment (BIA-...-HC)

Setup Possibilities

-45°

BIA-...-HC

Variable Geometry Diffusers | 5 / 12

+45°

0°

U

C

0 V 2 V 10 V

BIA-...-MC

Fig. 4: Different deection mechanism setup and resulting air ow pattern

Dimensions

øD

H

C

Tab. 1: Dimensions of BIA

Type-Size H C øD

BIA-200 550 330 198 4 4,4

BIA-250 700 440 248 6 6,4

BIA-315 850 515 313 9,5 10,3

BIA-400 1100 660 398 15,5 16,3

BIA-500 1350 800 498 23 23,8

BIA-630 1700 970 628 35,5 36,3

m

HC (manual) MC (actuator)

(mm) (kg)

Fig. 3: Dimensions of BIA

6 / 12 | Variable Geometry Diffusers

500

700

900

m³/h

m

TH

TV

Ordering Code

Size - Inlet ø (mm) 630

Manual HC

Adjustment Mechanism Type Actuator, continuous position 0 V ... 10 V, AC/DC 24 V power MC

RAL7001 silver grey (galvanized steel) SG

RAL9003 signal white (galvanized steel) SW

Other RAL colour (galvanized steel) RALXXXX

Surface Finish/Material Stainless steel A316 casing only (no paint) A

BIA- - -

200

250

315

400

500

Example of Ordering Code

BIA-200-HC-SW

Diffuser with inlet diameter 200 mm, manually adjustable, made of galvanized steel with RAL9003 signal white surface nish. .

Technical Parameters

Legend

p

q

L

TH TV

Pa Pressure drop

s

m3/h

V

WA

PA

x

Air ow volume

l/s

dB(A) A-weighted total radiated sound power level

A-weighted total sound pressure level

dB(A)

expressed for 10 m

Throw length, maximum horizontal (TH)

m

and maximum vertical (TV) component

calculated for specic terminal velocity

2

room absorption area

TH, TV

Throw length, maximum horizontal (TH) and maximum vertical (TV) component with terminal velocity 0,2 m/s.

TH

TV

x m/s Terminal velocity in range of 0,1 m/s ... 1 m/s

Flow pattern adjustment position

-45°, 0°, 45°

(angle of adjustment shaft – see Setup Possibilities

on page 5)

Calculation of Air Throw for Different Terminal Velocities

THx = TH · 0,2/x TV

= TV · 0,2/x

x

Variable Geometry Diffusers | 7 / 12

200

300

400

500

600

m³/h6080

100

120

140

160

l/s

4

8

12

16

202428

Pa

25 dB(A)

30 dB(A)

35 dB(A)

40 dB(A)

45 dB(A)

50 dB(A)

25 dB(A)

30 dB(A)

35 dB(A)

40 dB(A)

45 dB(A)

50 dB(A)

200

300

400

500

600

m³/h

0

2.5

5

m

TH

200

300

400

500

600

m³/h

2.540

m

TH

TV

200

300

400

500

600

m³/h

5

0

7

m

TV

400

500

600

700

800

900

1000

m³/h

100

150

200

250

l/s

5

10

15

20

25

Pa

25 dB(A)

30 dB(A)

35 dB(A)

40 dB(A)

45 dB(A)

50 dB(A)

25 dB(A)

30 dB(A)

35 dB(A)

40 dB(A)

45 dB(A)

50 dB(A)

400

500

600

700

800

900

1000

m³/h

0

5

7

m

TH

400

500

600

700

800

900

1000

m³/h

2.5

5

1

m

TH

TV

400

500

600

700

800

900

1000

m³/h

5

9

0

m

TV

SIZE 250

SIZE 200

BIA-200BIA-200

Diagram 1: Pressure drop and radiated A-weighted sound power level

dependent on air ow volume

BIA-200, -45°BIA-200, -45°

BIA-250BIA-250

Diagram 3: Pressure drop and radiated A-weighted sound power level

dependent on air ow volume

BIA-250, -45°BIA-250, -45°

BIA-200, 0°BIA-200, 0°

BIA-200, +45°BIA-200, +45°

Diagram 2: Isothermal air throw length with maximum horizontal (TH) and maximum vertical (TV) component with terminal velocity 0,2m/s,

dependent on air ow volume and adjustment angle

BIA-250, 0°BIA-250, 0°

BIA-250, +45°BIA-250, +45°

Diagram 4: Isothermal air throw length with maximum horizontal (TH) and maximum vertical (TV) component with terminal velocity 0,2m/s,

dependent on air ow volume and adjustment angle

8 / 12 | Variable Geometry Diffusers

600

800

1000

1200

1400

1600

m³/h

200

240

280

320

360

400

440

l/s

5

10

15

20

25

Pa

25 dB(A)

30 dB(A)

35 dB(A)

40 dB(A)

45 dB(A)

50 dB(A)

25 dB(A)

30 dB(A)

35 dB(A)

40 dB(A)

45 dB(A)

50 dB(A)

600

800

1000

1200

1400

1600

m³/h

0

5

8

m

TH

600

800

1000

1200

1400

1600

m³/h

2.5

51m

TH

TV

600

800

1000

1200

1400

1600

m³/h

5

0

10

m

TV

1000

1200

1400

1600

1800

2000

2200

m³/h

300

400

500

600

l/s

51015

20

Pa

25 dB(A)

30 dB(A)

35 dB(A)

40 dB(A)

45 dB(A)

50 dB(A)

25 dB(A)

30 dB(A)

35 dB(A)

40 dB(A)

45 dB(A)

50 dB(A)

1000

1200

1400

1600

1800

2000

2200

m³/h

0

5

8

m

TH

1000

1200

1400

1600

1800

2000

2200

m³/h

2.5

51m

TH

TV

1000

1200

1400

1600

1800

2000

2200

m³/h

5

0

10

m

TV

SIZE 400

SIZE 315

BIA-315BIA-315

Diagram 5: Pressure drop and radiated A-weighted sound power level

dependent on air ow volume

BIA-315, -45°BIA-315, -45°

BIA-400BIA-400

Diagram 7: Pressure drop and radiated A-weighted sound power level

dependent on air ow volume

BIA-400, -45°BIA-400, -45°

BIA-315, 0°BIA-315, 0°

BIA-315, +45°BIA-315, +45°

Diagram 6: Isothermal air throw length with maximum horizontal (TH) and maximum vertical (TV) component with terminal velocity 0,2m/s,

dependent on air ow volume and adjustment angle

BIA-400, 0°BIA-400, 0°

BIA-400, +45°BIA-400, +45°

Diagram 8: Isothermal air throw length with maximum horizontal (TH) and maximum vertical (TV) component with terminal velocity 0,2m/s,

dependent on air ow volume and adjustment angle

Variable Geometry Diffusers | 9 / 12

2000

2500

3000

3500

m³/h

500

600

700

800

900

1000

l/s

2468101214

16

Pa

25 dB(A)

30 dB(A)

35 dB(A)

40 dB(A)

45 dB(A)

50 dB(A)

25 dB(A)

30 dB(A)

35 dB(A)

40 dB(A)

45 dB(A)

50 dB(A)

2800

3200

3600

4000

4400

4800

5200

m³/h

800

1000

1200

1400

l/s

2

4

6

8

10

12

14

Pa

25 dB(A)

30 dB(A)

35 dB(A)

40 dB(A)

45 dB(A)

50 dB(A)

25 dB(A)

30 dB(A)

35 dB(A)

40 dB(A)

45 dB(A)

50 dB(A)

2000

2500

3000

3500

m³/h

0

5

8

m

TH

2000

2500

3000

3500

m³/h

2.5

1

5

m

TH

TV

2000

2500

3000

3500

m³/h

5

0

10

m

TV

2800

3200

3600

4000

4400

4800

5200

m³/h

0

5

8

m

TH

2800

3200

3600

4000

4400

4800

5200

m³/h

2.5

51m

TH

TV

2800

3200

3600

4000

4400

4800

5200

m³/h

5

0

10

m

TV

SIZE 630

SIZE 500

BIA-500BIA-500

Diagram 9: Pressure drop and radiated A-weighted sound power level

dependent on air ow volume

BIA-500, -45°BIA-500, -45°

BIA-630BIA-630

Diagram 11: Pressure drop and radiated A-weighted sound power level

dependent on air ow volume

BIA-630, -45°BIA-630, -45°

BIA-500, 0°BIA-500, 0°

BIA-500, +45°BIA-500, +45°

Diagram 10: Isothermal air throw length with maximum horizontal (TH) and maximum vertical (TV) component with terminal velocity 0,2m/s,

dependent on air ow volume and adjustment angle

BIA-630, 0°BIA-630, 0°

BIA-630, +45°BIA-630, +45°

Diagram 12: Isothermal air throw length with maximum horizontal (TH) and maximum vertical (TV) component with terminal velocity 0,2m/s,

dependent on air ow volume and adjustment angle

10 / 12 | Variable Geometry Diffusers

Installation, Maintenance & Operation

Information about installation, maintenance and operation is available in the “UserManual_BIA” document on

Systemair DESIGN.

Dry indoor conditions with an operation temperature range of -20°C to +50°C.

Transport & Storage

Dry indoor conditions with a temperature range of -40°C to +50°C.

Supplement

Any deviations from the technical specications contained herein and the terms should be discussed with the manufacturer. We reserve the right to make any changes to the product without prior notice, provided that these changes do not affect the quality of the product and the required parameters.

Current information on all products is available on

Systemair DESIGN.

Variable Geometry Diffusers | 11 / 12

Related Products

BURE

Variable Geometry Diffusers

Product information is available within the “DataSheet_BURE” technical documentation on

Systemair DESIGN.

VVT

Thermo-Adjustable Diffuser

Product information is available within the “DataSheet_VVT” technical documentation on

Systemair DESIGN.

www.systemair.com

Systemair Production a.s. · DataSheet_BIA_EN_202006

Systemair BIA Data Sheet

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of Contents

Description

Design

Dimensions

Ordering Code

Technical Parameters

Installation, Maintenance & Operation

Transport & Storage

Supplement

Related Products