Type TVR

FOR THE MOST DIVERSE APPLICATIONS REGARDING STANDARD VOLUME FLOW RATE RANGES

Circular VAV terminal units for standard applications regarding the supply air or extract air control in variable air volume systems

  • Suitable for the control of volume flow rate, room pressure or duct pressure
  • Electronic control components for different applications (Easy, Compact, Universal, and LABCONTROL)
  • High control accuracy even with upstream bend (R = 1D)
  • Suitable for airflow velocities up to 13 m/s
  • Closed blade air leakage to EN 1751, up to class 4
  • Casing air leakage to EN 1751, class C


Optional equipment and accessories

  • Acoustic cladding for the reduction of case-radiated noise
  • Secondary silencer Type CA, CS or CF for the reduction of air-regenerated noise
  • Hot water heat exchanger Type WL and electric air heater Type EL for reheating the airflow

VAV terminal unit Type TVR/160/Easy 00205730_0


  • Application
  • Description

Application

  • Circular VARYCONTROL VAV terminal units of Type TVR for the precise supply air or extract air flow control in variable air volume systems
  • Closed-loop volume flow control using an external power supply
  • For controlling, restricting, or shutting off the airflow in air conditioning systems
  • Shut-off by means of switching (equipment supplied by others)

Special characteristics

  • Integral differential pressure sensor with 3 mm measuring holes (resistant to dust and pollution)
  • Factory set-up or programming and aerodynamic function testing
  • Volume flow rate can be measured and subsequently adjusted on site; additional adjustment tool may be necessary

Nominal sizes

  • 100, 125, 160, 200, 250, 315, 400

Variants

  • TVR: VAV terminal unit
  • TVR-D: VAV terminal unit with acoustic cladding
  • TVR-FL: VAV terminal unit with flanges on both ends
  • TVR-D-FL: VAV terminal unit with acoustic cladding and flanges on both ends
  • Units with acoustic cladding and/or a secondary silencer Type CA, CS or CF for demanding acoustic requirements
  • Acoustic cladding cannot be retrofitted

Construction

  • Galvanised sheet steel
  • P1: Powder-coated, silver grey (RAL 7001)
  • A2: Stainless steel

Parts and characteristics

  • Ready-to-commission unit which consists of mechanical parts and control components.
  • Averaging differential pressure sensor for volume flow rate measurement
  • Damper blade
  • Factory-assembled control components complete with wiring and tubing
  • Aerodynamic function testing on a special test rig prior to shipping of each unit
  • Set-up data is given on a label or volume flow rate scale affixed to the unit
  • High control accuracy (even with upstream bend R = 1D)

Attachments

  • Easy controller: Compact unit consisting of controller with potentiometers, differential pressure transducer and actuator
  • Compact controller: Compact unit consisting of controller, differential pressure transducer and actuator
  • Universal controller: Controller, differential pressure transducer and actuators for special applications
  • LABCONTROL: Control components for air management systems

Accessories

  • G2: Matching flanges for both ends
  • D2: Lip seals on both ends (factory fitted)

Useful additions

  • Secondary silencer Type CA, CS or CF for demanding acoustic requirements
  • Heat exchanger Type WL
  • Electric air heater Type EL

Construction features

  • Circular casing
  • Spigot suitable for circular ducts to EN 1506 or EN 13180
  • Spigot with groove for lip seal
  • Position of the damper blade indicated externally at shaft extension
  • TVR-FL: Flanges to EN 12220

Materials and surfaces

Galvanised sheet steel construction

  • Casing and damper blade made of galvanised sheet steel
  • Damper blade seal made of TPE plastic
  • Aluminium sensor tubes
  • Plastic bearings


Powder-coated construction (P1)

  • Casing made of galvanised sheet steel, powder-coated
  • Damper blade and shaft made of stainless steel 1.4301
  • Sensor tubes made of aluminium, powder-coated


Stainless steel construction (A2)

  • Casing, damper blade and shaft made of stainless steel 1.4301
  • Sensor tubes made of aluminium, powder-coated


Variant with acoustic cladding (-D)

  • Acoustic cladding made of galvanised sheet steel
  • Rubber profile for the insulation of structure-borne noise
  • Lining is mineral wool


Mineral wool

  • To EN 13501, fire rating class A1, non-combustible
  • RAL quality mark RAL-GZ 388
  • Biosoluble and hence hygienically safe according to the German TRGS 905 (Technical Rules for Hazardous Substances) and EU directive 97/69/EG

Standards and guidelines

  • Hygiene conforms to VDI 6022
  • Closed blade air leakage to EN 1751, class 4 (nominal size 100, class 2; nominal sizes 125 and 160, class 3)
  • Nominal sizes 100, 125, and 160 meet the general requirements, nominal sizes 200 – 400 meet the increased requirements of DIN 1946, part 4, with regard to the acceptable closed blade air leakage
  • Casing air leakage to EN 1751, class C

Maintenance

  • Maintenance-free as construction and materials are not subject to wear

Technical information

Function, Technical data, Quick sizing, Specification text, Order code, Related Products

  • Function
  • Technical data
  • Quick sizing
  • Specification text
  • Order code
  • RELATED PRODUCTS
Schematic illustration of the TVR 00135835_0
① Differential pressure sensor
② Damper blade
③ Lip seal
④ Control components, e.g. an Easy controller


Functional description

The VAV terminal unit is fitted with a differential pressure sensor for measuring the volume flow rate.

The control components (attachments) include a differential pressure transducer that transforms the differential pressure (effective pressure) into an electric signal, a controller, and an actuator; the control functions can be achieved with an Easy controller, with a Compact controller, or with individual components (Universal or LABCONTROL).

For most applications, the setpoint value comes from a room temperature controller.

The controller compares the actual value with the setpoint value and alters the control signal of the actuator if there is a difference between the two values.

Volume flow rate ranges

The minimum differential pressure of VAV terminal units is an important factor in designing the ductwork and in rating the fan including speed control.

Sufficient duct pressure must be ensured for all operating conditions and for all control units. The measurement points for fan speed control must be selected accordingly.

The volume flow rates given for VAV terminal units depend on the nominal size and on the control component (attachment) that is installed. The table gives the minimum and maximum values for a VAV terminal unit. Some control components may only have a limited volume flow rate range. This applies in particular to control components with a static differential pressure transducer. For volume flow rate ranges for all control components refer to our Easy Product Finder design programme.

Nominal size
V
l/s
V
m³/h

∆pst min
Pa

∆pst min
Pa

∆pst min
Pa

∆pst min
Pa
∆V
± %
100 10 36 5 5 5 5 15
100 40 144 15 15 20 20 8
100 65 234 35 40 45 50 7
100 95 342 70 85 95 105 5
125 15 54 5 5 5 5 15
125 60 216 15 20 20 20 7
125 105 378 45 50 55 60 6
125 150 540 90 100 110 115 5
160 25 90 5 5 5 5 15
160 100 360 15 15 15 15 8
160 175 630 35 40 45 45 7
160 250 900 70 80 85 95 5
200 40 144 5 5 5 5 15
200 160 576 15 15 15 15 7
200 280 1008 35 35 40 40 5
200 405 1458 65 70 75 80 5
250 60 216 5 5 5 5 15
250 250 900 10 10 10 15 7
250 430 1548 25 25 30 35 5
250 615 2214 45 50 55 65 5
315 100 360 5 5 5 5 15
315 410 1476 5 10 10 10 7
315 720 2592 15 20 20 20 6
315 1030 3708 30 35 40 40 5
400 170 612 5 5 5 5 15
400 670 2412 5 5 5 5 7
400 1175 4230 15 15 15 15 6
400 1680 6048 25 30 30 35 5


Nominal sizes

100 – 400 mm

Volume flow rate range

10 – 1680 l/s or 36 – 6048 m³/h

Volume flow rate control range (unit with dynamic differential pressure measurement)

Approx. 10 to 100% of the nominal volume flow rate

Minimum differential pressure

5 – 90 Pa

Maximum differential pressure

1000 Pa

Operating temperature

10 – 50 °C




Quick sizing tables provide a good overview of the room sound pressure levels that can be expected. Approximate intermediate values can be interpolated. Precise intermediate values and spectral data can be calculated with our Easy Product Finder design programme.

The first selection criteria for the nominal size are the actual volume flow rates Vmin and Vmax. The quick sizing tables are based on generally accepted attenuation levels. If the sound pressure level exceeds the required level, a larger air terminal unit and/or a silencer is required.

TVR, Sound pressure level at differential pressure 150 Pa

Nominal size V Air-regenerated noise Case-radiated noise
Nominal size V
Nominal size V LPA LPA1 LPA2 LPA3
Nominal size l/s m³/h dB (A)

100

10

36

32

20

<15

<15

<15

<15

100

40

144

45

36

28

26

25

18

100

65

234

51

41

33

31

31

24

100

95

342

54

42

33

31

36

27

125

15

54

33

22

<15

<15

<15

<15

125

60

216

45

36

30

28

25

17

125

105

378

49

40

34

32

31

21

125

150

540

52

41

34

32

35

24

160

25

90

40

28

20

16

20

<15

160

100

360

47

39

34

31

28

19

160

175

630

50

42

37

34

32

23

160

250

900

53

44

39

36

37

28

200

40

144

40

31

23

20

20

<15

200

160

576

47

40

34

33

29

15

200

280

1008

50

44

40

38

32

21

200

405

1458

54

45

39

38

38

25

250

60

216

37

28

22

20

20

<15

250

250

900

47

40

34

33

35

18

250

430

1548

48

42

38

37

37

25

250

615

2214

52

44

38

37

42

29

315

105

378

42

35

28

25

28

<15

315

410

1476

47

42

35

34

39

21

315

720

2592

49

44

39

38

42

28

315

1030

3708

53

48

42

41

46

35

400

170

612

43

36

30

26

30

<15

400

670

2412

44

38

32

30

37

21

400

1175

4230

47

42

36

35

41

29

400

1680

6048

50

44

38

37

46

33

① TVR

② TVR with secondary silencer CS/CF, insulation thickness 50 mm, length 500 mm

③ TVR with secondary silencer CS/CF, insulation thickness 50 mm, length 1000 mm

④ TVR with secondary silencer CS/CF, insulation thickness 50 mm, length 1500 mm

⑤ TVR-D


Circular VAV terminal units for variable and constant air volume systems, suitable for supply or extract air, available in seven nominal sizes.

High control accuracy (even with upstream bend R = 1D).

Ready-to-commission unit which consists of the mechanical parts and the electronic control components. Each unit contains an averaging differential pressure sensor for volume flow rate measurement and a damper blade. Factory assembled control components complete with wiring and tubing.

Differential pressure sensor with 3 mm measuring holes (resistant to dust and pollution)

Spigot with groove for lip seal, suitable for connecting ducts according to EN 1506 or EN 13180.

Position of the damper blade indicated externally at shaft extension.

Closed blade air leakage to EN 1751, class 4 (nominal size 100, class 2; nominal sizes 125 and 160, class 3).

Casing air leakage to EN 1751, class C.

Special characteristics

  • Integral differential pressure sensor with 3 mm measuring holes (resistant to dust and pollution)
  • Factory set-up or programming and aerodynamic function testing
  • Volume flow rate can be measured and subsequently adjusted on site; additional adjustment tool may be necessary

Materials and surfaces

Galvanised sheet steel construction

  • Casing and damper blade made of galvanised sheet steel
  • Damper blade seal made of TPE plastic
  • Aluminium sensor tubes
  • Plastic bearings


Powder-coated construction (P1)

  • Casing made of galvanised sheet steel, powder-coated
  • Damper blade and shaft made of stainless steel 1.4301
  • Sensor tubes made of aluminium, powder-coated


Stainless steel construction (A2)

  • Casing, damper blade and shaft made of stainless steel 1.4301
  • Sensor tubes made of aluminium, powder-coated


Variant with acoustic cladding (-D)

  • Acoustic cladding made of galvanised sheet steel
  • Rubber profile for the insulation of structure-borne noise
  • Lining is mineral wool


Mineral wool

  • To EN 13501, fire rating class A1, non-combustible
  • RAL quality mark RAL-GZ 388
  • Biosoluble and hence hygienically safe according to the German TRGS 905 (Technical Rules for Hazardous Substances) and EU directive 97/69/EG

Construction

  • Galvanised sheet steel
  • P1: Powder-coated, silver grey (RAL 7001)
  • A2: Stainless steel

Technical data

  • Nominal sizes: 100 to 400 mm
  • Volume flow rate range: 10 to 1680 l/s or 36 to 6048 m³/h
  • Volume flow rate control range (unit with dynamic differential pressure measurement): approx. 10 to 100 % of the nominal volume flow rate
  • Minimum differential pressure: 5 – 90 Pa
  • Maximum differential pressure: 1000 Pa

Attachments

Variable volume flow control with electronic Easy controller to connect an external control signal; actual value signal can be integrated into the central BMS.

  • Supply voltage 24 V AC/DC
  • Signal voltages 0 – 10 V DC
  • Possible override controls with external switches using volt-free contacts: CLOSED, OPEN, Vmin and Vmax
  • Potentiometers with percentage scales to set the volume flow rates Vmin and Vmax
  • The actual value signal relates to the nominal volume flow rate such that commissioning and subsequent adjustment are simplified
  • Volume flow rate control range: approx. 10 – 100 % of the nominal volume flow rate
  • Clearly visible external indicator light for signalling the functions: Set, not set, and power failure

Electrical connections with screw terminals. Double terminals for looping the supply voltage, i.e. for the simple connection of voltage transmission to the next controller.

Sizing data

  • V _______________________ [m³/h]
  • Δpst _______________________ [Pa]

Air-regenerated noise

  • LPA _______________________ [dB(A)]

Case-radiated noise

  • LPA _______________________ [dB(A)]

This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme.

Order example: TVR/200/D2/BC0/E0/500–1200 m³/h

Acoustic cladding

Without

Material

Galvanised sheet steel

Flange

Without

Nominal size

200 mm

Accessories

Lip seals on both ends

Attachment

Compact controller

Operating mode

Single

Signal voltage range

0 – 10 V DC

Volume flow rate

500 – 1200 m³/h


Order example: TVR/200/D2/ELAB/FH-2P/200-700

Acoustic cladding

Without

Nominal size

200 mm

Accessories

Lip seals on both ends

Attachments

EASYLAB controller TCU3 with fast-running actuator

Equipment function

Two switching steps


 

Variants, Attachments, Dimensions and weight

  • Variants
  • ATTACHMENTS
  • Dimensions and weight

TVR

  • VAV terminal unit for the control of variable air volume flow rates
  • Spigot to make connections to the ducting

TVR-D

  • VAV terminal unit with acoustic cladding for the control of variable air volume flows
  • For rooms where the case-radiated noise of the unit is not sufficiently reduced by a false ceiling
  • The circular ducts for the room under consideration must have adequate acoustic insulation (provided by others) on the fan and room ends
  • Acoustic cladding cannot be retrofitted

TVR-FL

  • VAV terminal unit for the control of variable air volume flow rates
  • With flanges on both ends to make detachable connections to the ducting

TVR-D-FL

  • VAV terminal unit with acoustic cladding for the control of variable air volume flows
  • With flanges on both ends to make detachable connections to the ducting
  • For rooms where the case-radiated noise of the unit is not sufficiently reduced by a false ceiling
  • The circular ducts for the room under consideration must have adequate acoustic insulation (provided by others) on the fan and room ends
  • Acoustic cladding cannot be retrofitted
  • Powder-coated surface (P1) or stainless steel construction (A2) not possible

Materials

Order code detail Part Material Notes

Casing

Galvanised sheet steel


Damper blade

Galvanised sheet steel


Damper blade seal

Thermoplastic elastomer (TPE)


Shaft

Galvanised steel


Sensor tubes

Aluminium


Plain bearings

Plastic


D

Acoustic cladding

Galvanised sheet steel


D

Rubber profile for the insulation of structure-borne noise

Rubber


D

Lining

Mineral wool


P1

Casing

Galvanised sheet steel


P1

Damper blade

Stainless steel, material no. 1.4301


P1

Shaft

Stainless steel, material no. 1.4301


A2

Casing

Stainless steel, material no. 1.4301


A2

Damper blade

Stainless steel, material no. 1.4301


A2

Shaft

Stainless steel, material no. 1.4305



Surfaces

Order code detail Part Surface Notes

Casing

Untreated


Sensor tubes

Untreated


P1

Casing

Powder-coated, RAL 7001, silver grey


P1

Sensor tubes

Powder-coated, RAL 7001, silver grey


A2

Casing

Untreated


A2

Sensor tubes

Powder-coated, RAL 7001, silver grey



TVR, VARYCONTROL control components

Order code detail Controlled variable Controller Differential pressure transducer Actuator

Easy controller





Easy

Volume flow rate

Easy controller TROX

Dynamic, integral

Integral

Compact controller, dynamic





BC0

Volume flow rate

Compact controller with MP bus interface TROX/Belimo

Dynamic, integral

Integral

BL0

Volume flow rate

Compact controller with LonWorks interface TROX/Belimo

Dynamic, integral

Integral

BM0

Volume flow rate

Compact controller with Modbus RTU interface (with connecting cable) TROX/Belimo

Dynamic, integral

Integral

BM0-J6

Volume flow rate

Compact controller with Modbus RTU interface (with socket) TROX/Belimo

Dynamic, integral

Integral

XB0

Volume flow rate

Compact controller TROX/Gruner

Dynamic, integral

Integral

LN0

Volume flow rate

Compact controller Siemens

Dynamic, integral

Integral

LK0

Volume flow rate

Compact controller with KNX interface Siemens

Dynamic, integral

Integral

Compact controller, static





SA0

Volume flow rate

Compact controller with SLC interface Sauter

Static, integral

Integral

SC0

Volume flow rate

Compact controller with SLC interface Sauter

Static, integral

Fast-running actuator, integral

Universal controller, dynamic





B13

Volume flow rate

Universal controller TROX/Belimo

Dynamic, integral

Actuator

B1B

Volume flow rate

Universal controller TROX/Belimo

Dynamic, integral

Spring return actuator

XC3

Volume flow rate

Universal controller TROX/Gruner

Dynamic, integral

Spring return actuator

Universal controller, static





BP3

Volume flow rate

Universal controller with MP bus interface TROX/Belimo

Static

Actuator

BPB

Volume flow rate

Universal controller with MP bus interface TROX/Belimo

Static

Spring return actuator

BPG

Volume flow rate

Universal controller with MP bus interface TROX/Belimo

Static

Fast-running actuator

BB3

Volume flow rate

Universal controller TROX/Belimo

Static

Actuator

BBB

Volume flow rate

Universal controller TROX/Belimo

Static

Spring return actuator

XD1

Volume flow rate

Universal controller TROX/Gruner

Static, integral

Actuator

XD3

Volume flow rate

Universal controller TROX/Gruner

Static, integral

Spring return actuator

BR3

Differential pressure

Universal controller with MP bus interface TROX/Belimo

Static, integral 100 Pa

Actuator

BRB

Differential pressure

Universal controller with MP bus interface TROX/Belimo

Static, integral 100 Pa

Spring return actuator

BRG

Differential pressure

Universal controller with MP bus interface TROX/Belimo

Static, integral 100 Pa

Fast-running actuator

BS3

Differential pressure

Universal controller with MP bus interface TROX/Belimo

Static, integral 600 Pa

Actuator

BSB

Differential pressure

Universal controller with MP bus interface TROX/Belimo

Static, integral 600 Pa

Spring return actuator

BSG

Differential pressure

Universal controller with MP bus interface TROX/Belimo

Static, integral 600 Pa

Fast-running actuator

BG3

Differential pressure

Differential pressure controller TROX/Belimo

Static, integral 100 Pa

Actuator

BGB

Differential pressure

Differential pressure controller TROX/Belimo

Static, integral 100 Pa

Spring return actuator

BH3

Differential pressure

Differential pressure controller TROX/Belimo

Static, integral 600 Pa

Actuator

BHB

Differential pressure

Differential pressure controller TROX/Belimo

Static, integral 600 Pa

Spring return actuator

XE1

Differential pressure

Differential pressure controller TROX/Gruner

Static, integral 100 Pa

Actuator

XE3

Differential pressure

Differential pressure controller TROX/Gruner

Static, integral 100 Pa

Spring return actuator

XF1

Differential pressure

Differential pressure controller TROX/Gruner

Static, integral 600 Pa

Actuator

XF3

Differential pressure

Differential pressure controller TROX/Gruner

Static, integral 600 Pa

Spring return actuator


TVR, LABCONTROL control components

Order code detail Controlled variable Controller Differential pressure transducer Actuator

EASYLAB





ELAB

Room supply air Room extract air Room pressure Single controller

EASYLAB controller TCU3

Static, integral

Fast-running actuator

Nominal size
Easy Compact
L
mm
Universal LABCONTROL
L
mm
ØD
mm
m
kg
100 310 600 99 3.3
125 310 600 124 3.6
160 400 600 159 4.2
200 400 600 199 5.1
250 400 600 249 6.1
315 500 600 314 7.2
400 500 600 399 9.4


Nominal size
Easy Compact
L
mm
Easy Compact
L1
mm
Universal LABCONTROL
L
mm
Universal LABCONTROL
L1
mm
ØD
mm
ØD3
mm
m
kg
100 310 232 600 517 99 198 7.2
125 310 232 600 517 124 223 8.5
160 400 312 600 517 159 258 11.0
200 400 312 600 517 199 298 13.9
250 400 312 600 517 249 348 15.9
315 500 417 600 517 314 413 18.0
400 500 417 600 517 399 498 22.6


Nominal size
Easy Compact
L
mm
Universal LABCONTROL
L
mm
ØD
mm
ØD1
mm
ØD2
mm
n
T
mm
m
kg
100 290 580 99 132 152 4 4 3.9
125 290 580 124 157 177 4 4 4.2
160 380 580 159 192 212 6 4 5.3
200 380 580 199 233 253 6 4 6.5
250 380 580 249 283 303 6 4 7.8
315 480 580 314 352 378 8 4 10.3
400 480 580 399 438 464 8 4 13.3


Nominal size
Easy Compact
L
mm
Easy Compact
L1
mm
Universal LABCONTROL
L
mm
Universal LABCONTROL
L1
mm
ØD
mm
ØD1
mm
ØD2
mm
ØD3
mm
n
T
mm
m
kg
100 290 232 580 517 99 132 152 198 4 4 7.8
125 290 232 580 517 124 157 177 223 4 4 9.1
160 380 312 580 517 159 192 212 258 6 4 12.1
200 380 312 580 517 199 233 253 298 6 4 14.3
250 380 312 580 517 249 283 303 348 6 4 17.6
315 480 417 580 517 314 352 378 413 8 4 21.2
400 480 417 580 517 399 438 464 498 8 4 26.5










Installation details, Basic information and nomenclature

  • Installation details
  • Basic information and nomenclature

Installation and commissioning

  • Any installation orientation (except units with static differential pressure transducer)
  • TVR-D: For constructions with acoustic cladding, ducts on the room side should have cladding up to the acoustic cladding of the controller

Upstream conditions

The volume flow rate accuracy ΔV applies to a straight upstream section of the duct. Bends, junctions or a narrowing or widening of the duct cause turbulence that may affect measurement. Duct connections, e.g. branches off the main duct, must comply with EN 1505. Some installation situations require straight duct sections upstream.

Space required for commissioning and maintenance

Sufficient space must be kept clear near any attachments to allow for commissioning and maintenance. It may be necessary to provide sufficiently sized inspection access openings.

Space requirement, control component on one side

Attachments
Attachments mm

VARYCONTROL




Easy controller

250

200

300

Compact controller

250

200

250

Universal controller, dynamic

520

250

250

LABCONTROL




EASYLAB

550

350

400


Space requirement, control components on two sides

Attachments
Attachments mm

VARYCONTROL







Universal controller, static

520

250

250

250

150

250


Principal dimensions

ØD [mm]

VAV terminal units made of stainless steel: Outside diameter of the spigot

VAV terminal units made of plastic: Inside diameter of the connecting spigot

ØD₁ [mm]

Pitch circle diameter of flanges

ØD₂ [mm]

Outside diameter of flanges

ØD₄ [mm]

Inside diameter of the screw holes of flanges

L [mm]

Length of unit including connecting spigot

L₁ [mm]

Length of casing or acoustic cladding

B [mm]

Duct width

B₁ [mm]

Screw hole pitch of flange (horizontal)

B₂ [mm]

Outside dimension of flange (width)

B₃ [mm]

Width of device

H [mm]

Duct height

H₁ [mm]

Screw hole pitch of flange (vertical)

H₂ [mm]

Outside dimension of flange (height)

H₃ [mm]

Unit height

n [ ]

Number of flange screw holes

T [mm]

Flange thickness

m [kg]

Unit weight including the minimum required attachments (e.g. Compact controller)

Acoustic data

fm [Hz]

Octave band centre frequency

LPA [dB(A)]

A-weighted sound pressure level of air-regenerated noise of the VAV terminal unit, system attenuation taken into account

LPA1 [dB(A)]

A-weighted sound pressure level of air-regenerated noise of the VAV terminal unit with secondary silencer, system attenuation taken into account

LPA2 [dB(A)]

A-weighted sound pressure level of case-regenerated noise of the VAV terminal unit, system attenuation taken into account

LPA3 [dB(A)]

A-weighted sound pressure level of case-regenerated noise of the VAV terminal unit with acoustic cladding, system attenuation taken into account


All sound pressure levels are based on 20 μPa.

Volume flow rates

Vnom [m³/h] and [l/s]

Nominal volume flow rate (100 %)

  • The value depends on product type and nominal size
  • Values are published on the internet and in technical leaflets, and stored in the Easy Product Finder design software.
  • Reference value for calculating percentages (e.g. Vmax)
  • Upper limit of the setting range and maximum volume flow rate setpoint value for the VAV terminal unit

Vmin unit [m³/h] and [l/s]

Technically possible minimum volume flow rate

  • The value depends on product type, nominal size and control component (attachment)
  • Values are stored in the Easy Product Finder design software
  • Lower limit of the setting range and minimum volume flow rate setpoint value for the VAV terminal unit
  • Depending on the controller, setpoint values below Vmin unit (if Vmin equals zero) may result in unstable control or shut-off

Vmax [m³/h] and [l/s]

Upper limit of the operating range for the VAV terminal unit that can be set by customers

  • Vmax can only be smaller than or equal to Vnom
  • In case of analogue signalling to volume flow controllers (which are typically used), the set maximum value (Vmax) is allocated to the setpoint signal maximum (10 V) (see characteristic)

Vmin [m³/h] and [l/s]

Lower limit of the operating range for the VAV terminal unit that can be set by customers

  • Vmin should be smaller than or equal to Vmax
  • Do not set Vmin smaller than Vmin unit, otherwise the control may become unstable or the damper blade may close
  • Vmin may equal zero
  • In case of analogue signalling to volume flow controllers (which are typically used), the set minimum value (Vmin) is allocated to the setpoint signal minimum (0 or 2 V) (see characteristic)

V [m³/h] and [l/s]

Volume flow rate

ΔV [± %]

Volume flow rate tolerance from setpoint value

ΔVwarm [± %]

Volume flow rate tolerance for the warm air flow of dual duct terminal units

Differential pressure

Δpst [Pa]

Static differential pressure

Δpst min [Pa]

Static differential pressure, minimum

  • The static minimum differential pressure is equal to the pressure loss of the VAV terminal unit when the damper blade is open, caused by flow resistance (sensor tubes, damper mechanism)
  • If the pressure on the VAV terminal unit is too low, the setpoint volume flow rate may not be achieved, not even when the damper blade is open
  • Important factor in designing the ductwork and in rating the fan including speed control
  • Sufficient duct pressure must be ensured for all operating conditions and for all terminal units, and the measurement point or points for speed control must have been selected accordingly to achieve this

Construction

Galvanised sheet steel

  • Casing made of galvanised sheet steel
  • Parts in contact with the airflow as described for the product type
  • External parts, e.g. mounting brackets or covers, are usually made of galvanised sheet steel

Powder-coated surface (P1)

  • Casing made of galvanised sheet steel, powder-coated RAL 7001, silver grey
  • Parts in contact with the airflow are powder-coated or made of plastic
  • Due to production, some parts that come into contact with the airflow may be stainless steel or aluminium, powder-coated
  • External parts, e.g. mounting brackets or covers, are usually made of galvanised sheet steel

Stainless steel (A2)

  • Casing made of stainless steel 1.4201
  • Parts in contact with the airflow are powder-coated or made of stainless steel
  • External parts, e.g. mounting brackets or covers, are usually made of galvanised sheet steel

Share page

Recommend this page

Recommend this page by sending a link by mail.

Fields marked with an (*) are required fields.

Share page

Thank you for your recommendation!

Your recommendation has been sent and should arrive shortly.

Contact

We are here for you

Visual contact Visual contact

Please specify your message and type of request.
Tel.: +91 (0) 22 6775-1600 | Fax: +91 (0) 226775-1613

Fields marked with an (*) are required fields.

Contact

Thank you for your message!

Visual contact Visual contact

Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +91 (0) 22 6775-1600 | Fax: +91 (0) 226775-1613

Contact

We are here for you

Visual contact Visual contact

Please specify your message and type of request.
Tel.: +91 (0) 22 6775-1600 | Fax: +91 (0) 226775-1613

Attachment (max. 10MB)

Fields marked with an (*) are required fields.

Contact

Thank you for your message!

Visual contact Visual contact

Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +91 (0) 22 6775-1600 | Fax: +91 (0) 226775-1613