Circular VAV terminal units for variable air volume systems, approved and certified for potentially explosive atmospheres (ATEX)
Optional equipment and accessories
Application
Special features
Classification
Electronic control: Equipment group II
Pneumatic control: Equipment group II
Nominal sizes
Construction
Parts and characteristics
Attachments
Accessories
Useful additions
Construction features
Materials and surfaces
Standards and guidelines
Maintenance
Electronic control
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.
For most applications, the setpoint value comes from a room temperature controller which is installed outside of the potentially explosive atmosphere.
The controller compares the actual value with the setpoint value and alters the control signal of the damper actuator if there is a difference between the two values.
The connections for the supply voltage and for the voltage signals are made in a terminal box that is suitable for use in potentially explosive atmospheres.
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.
l/s | m³/h |
① Pa |
② Pa |
③ Pa |
④ Pa | ± % | |
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l/s | m³/h |
① Pa |
② Pa |
③ Pa |
④ Pa | ± % | |
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Nominal sizes | 125 – 400 mm |
Volume flow rate range | 15 – 1680 l/s or 54 – 6048 m³/h |
Volume flow rate control range | Approx. 15 to 100% of the nominal volume flow rate |
Maximum differential pressure | 1000 Pa |
Operating temperature | 10 – 50 °C |
Electronic
Supply voltage (AC) | 24 V AC ± 10 %, 50/60 Hz |
Supply voltage (DC) | 24 V DC ± 10 % |
Power rating (AC) | 20 VA max. |
Power rating (DC) | 20 W max. |
Setpoint value signal input | 0 – 10 V DC, Ra > 100 kΩ |
Actual value signal output | 0 – 10 V DC, max. 0.5 mA |
IEC protection class | III (protective extra-low voltage) |
Protection level | IP 42 |
EC conformity | ATEX to 94/9/EG, EMC to 2004/108/EG, low voltage to 2006/95/EG |
Pneumatic
Operating pressure | 1.3 bar ± 0.1 bar |
Air consumption – volume flow control | 50 ln/h |
Air consumption – pressure and volume flow cascade | 100 ln/h |
Control pressure | 0.2 – 1.0 bar |
Maximum pressure | 1.5 bar |
Compressed air | Compressed air for instruments, free of oil, water and dust |
Protection level | IP 42 |
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-Ex, electronic, Sound pressure level at differential pressure 150 Pa
125 | 22 | 79 | 36 | 25 | 16 | <15 | 16 |
125 | 60 | 216 | 45 | 36 | 30 | 28 | 25 |
125 | 105 | 378 | 49 | 40 | 34 | 32 | 31 |
125 | 150 | 540 | 52 | 41 | 34 | 32 | 35 |
160 | 35 | 126 | 41 | 30 | 22 | 19 | 22 |
160 | 100 | 360 | 47 | 39 | 34 | 31 | 28 |
160 | 175 | 630 | 50 | 42 | 37 | 34 | 32 |
160 | 250 | 900 | 53 | 44 | 39 | 36 | 37 |
200 | 60 | 216 | 41 | 32 | 24 | 22 | 21 |
200 | 160 | 576 | 47 | 40 | 34 | 33 | 29 |
200 | 280 | 1008 | 50 | 44 | 40 | 38 | 32 |
200 | 405 | 1458 | 54 | 45 | 39 | 38 | 38 |
250 | 90 | 324 | 38 | 30 | 24 | 22 | 22 |
250 | 245 | 882 | 47 | 40 | 34 | 32 | 35 |
250 | 430 | 1548 | 48 | 42 | 38 | 37 | 37 |
250 | 615 | 2214 | 52 | 44 | 38 | 37 | 42 |
315 | 145 | 522 | 43 | 36 | 29 | 26 | 29 |
315 | 410 | 1476 | 47 | 42 | 35 | 34 | 39 |
315 | 720 | 2592 | 49 | 44 | 39 | 38 | 42 |
315 | 1030 | 3708 | 53 | 48 | 42 | 41 | 46 |
400 | 240 | 864 | 43 | 36 | 29 | 26 | 31 |
400 | 670 | 2412 | 44 | 38 | 32 | 30 | 37 |
400 | 1175 | 4230 | 47 | 42 | 36 | 35 | 41 |
400 | 1680 | 6048 | 50 | 44 | 38 | 37 | 46 |
① TVR-Ex
② TVR-Ex with secondary silencer CA, insulation thickness 50 mm, length 500 mm
③ TVR-Ex with secondary silencer CA, insulation thickness 50 mm, length 1000 mm
④ TVR-Ex with secondary silencer CA, insulation thickness 50 mm, length 1500 mm
TVR-Ex, pneumatic, Sound pressure level at differential pressure 150 Pa
125 | 15 | 54 | 33 | 22 | <15 | <15 | <15 |
125 | 40 | 144 | 39 | 29 | 22 | 19 | 20 |
125 | 70 | 252 | 46 | 37 | 31 | 29 | 26 |
125 | 100 | 360 | 49 | 40 | 34 | 32 | 31 |
160 | 25 | 90 | 40 | 28 | 20 | 16 | 20 |
160 | 75 | 270 | 45 | 35 | 29 | 26 | 25 |
160 | 125 | 450 | 49 | 41 | 36 | 33 | 29 |
160 | 175 | 630 | 50 | 42 | 37 | 34 | 32 |
200 | 40 | 144 | 40 | 31 | 23 | 20 | 20 |
200 | 125 | 450 | 46 | 37 | 31 | 30 | 26 |
200 | 210 | 756 | 48 | 41 | 36 | 35 | 30 |
200 | 300 | 1080 | 51 | 44 | 40 | 38 | 33 |
250 | 60 | 216 | 41 | 32 | 24 | 22 | 21 |
250 | 200 | 720 | 44 | 36 | 31 | 29 | 30 |
250 | 340 | 1224 | 47 | 40 | 35 | 34 | 36 |
250 | 475 | 1710 | 49 | 42 | 38 | 37 | 38 |
315 | 105 | 378 | 42 | 35 | 28 | 25 | 28 |
315 | 330 | 1188 | 45 | 40 | 33 | 31 | 35 |
315 | 555 | 1998 | 47 | 42 | 36 | 35 | 40 |
315 | 775 | 2790 | 50 | 44 | 39 | 38 | 43 |
400 | 170 | 612 | 43 | 36 | 30 | 26 | 30 |
400 | 545 | 1962 | 43 | 37 | 31 | 29 | 35 |
400 | 920 | 3312 | 45 | 40 | 34 | 33 | 39 |
400 | 1300 | 4680 | 48 | 42 | 37 | 35 | 43 |
① TVR-Ex
② TVR-Ex with secondary silencer CA, insulation thickness 50 mm, length 500 mm
③ TVR-Ex with secondary silencer CA, insulation thickness 50 mm, length 1000 mm
④ TVR-Ex with secondary silencer CA, insulation thickness 50 mm, length 1500 mm
VAV terminal units for variable and constant air volume systems in potentially explosive atmospheres, suitable for supply or extract air, available in 6 nominal sizes.
High control accuracy (even with upstream bend R = 1D).
Ready-to-commission unit which consists of the mechanical parts, the electronic control components, and parts for equipotential bonding and for use in potentially explosive atmospheres. 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 lip seal, for circular connecting ducts to EN 1506 or EN 13180.
Closed blade air leakage to EN 1751, class 4 (nominal sizes 125 and 160, class 3).
Casing air leakage to EN 1751, class C.
Special features
Materials and surfaces
Construction
Technical data
Attachments
Variable volume flow control with electronic controller to switch a control signal and an actual value signal for integration into the central BMS.
Sizing data
Air-regenerated noise
Case-radiated noise
This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme.
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Order example: TVR-Ex/200/S1S/400–1200 m³/h
Material | Galvanised sheet steel |
Nominal size | 200 mm |
Attachments | Electronic controller, internal, pressure transducer and actuator |
Volume flow rate | 400 – 1200 m³/h |
Order example: TVR-Ex/160/PG5/200–500 m³/h/NO
Material | Galvanised sheet steel |
Nominal size | 160 mm |
Attachments | Pneumatic volume flow controller with actuator |
Volume flow rate | 200 – 500 m³/h |
Damper blade position | Pressure off to OPEN |
Order example: TVR-Ex/160/TES/SC–E0/T/200–900 m³/h
Material | Galvanised sheet steel |
Nominal size | 160 mm |
Attachments | Electronic controller, external, pressure transducer and actuator with auxiliary switch |
Equipment function | Supply air controller |
Expansion modules | EM-TRF for 230 V AC |
Volume flow rate | 200 – 900 m³/h |
TVR-Ex, EXCONTROL Electric control components
Internal controller | ||||
S1S | Volume flow rate | Universal controller (use in areas with potentially explosive atmospheres) Schischek | Static, integral | Actuator |
S1F | Volume flow rate | Universal controller (use in areas with potentially explosive atmospheres) Schischek | Static, integral | Spring return actuator |
S1X | Volume flow rate | Universal controller (use in areas with potentially explosive atmospheres) Schischek | Static, integral | Actuator with auxiliary switches |
S1Y | Volume flow rate | Universal controller (use in areas with potentially explosive atmospheres) Schischek | Static, integral | Spring return actuator with auxiliary switch |
External controller | ||||
TES | Volume flow rate | Volume flow rate controller TCU3 (use in areas with potentially explosive atmospheres) TROX/Schischek | Static | Actuator |
TEF | Volume flow rate | Volume flow rate controller TCU3 (use in areas with potentially explosive atmospheres) TROX/Schischek | Static | Spring return actuator |
TEX | Volume flow rate | Volume flow rate controller TCU3 (use in areas with potentially explosive atmospheres) TROX/Schischek | Static | Actuator with auxiliary switches |
TEY | Volume flow rate | Volume flow rate controller TCU3 (use in areas with potentially explosive atmospheres) TROX/Schischek | Static | Spring return actuator with auxiliary switch |
TVR-Ex, EXCONTROL Pneumatic control components
Volume flow controllers | ||||
PG5 | Volume flow rate | Volume flow controller Sauter | Integral | Actuator |
Pressure and volume flow cascade | ||||
PJ5 | Room pressure | Room pressure controller ± 20 Pa Volume flow controller Sauter | Integral | Actuator |
PL5 | Room pressure | Room pressure controller ± 50 Pa Volume flow controller Sauter | Integral | Actuator |
Attachments: VARYCONTROL control components
Easy controller | Dynamic | |||||||||||||||||
Easy | V | Integral | Integral | ① | ● | ● | ● | ● | ● | ● | ● | ● | ||||||
Compact controller | Dynamic | |||||||||||||||||
BC0 | V | MP bus | Integral | Integral | ② | ● | ● | ● | ● | ● | ● | ● | ● | |||||
BF0 | V | MP bus | Integral | Integral | ② | ● | ||||||||||||
BL0 | V | LonWorks | Integral | Integral | ② | ● | ● | ● | ● | ● | ● | ● | ||||||
BM0 | V | Modbus | Integral | Integral | ② | |||||||||||||
BM0-J6 | V | Modbus and plug-in connecting cable | Integral | Integral | ② | |||||||||||||
XG0 | V | Integral | Integral | ③ | ● | |||||||||||||
XB0 | V | Integral | Integral | ③ | ● | ● | ● | ● | ● | ● | ● | |||||||
LN0 | V | Integral | Integral | ⑤ | ● | ● | ● | ● | ● | ● | ● | |||||||
LK0 | V | KNX | ⑤ | |||||||||||||||
LY0 | V | Integral | Integral | ⑤ | ● | |||||||||||||
Compact controller | Static | |||||||||||||||||
SA0 | V | Integral | Integral | ④ | ||||||||||||||
SC0 | Δp | Integral | Fast-running actuator, integral | ④ | ||||||||||||||
Universal controller | Dynamic | |||||||||||||||||
B11 | V | Integral | Actuator, torque for TVT | ② | ● | |||||||||||||
B13 | V | Integral | Actuator | ② | ● | ● | ● | ● | ● | ● | ||||||||
B27 | V | Integral | Actuator | ② | ● | |||||||||||||
B1B | V | Integral | Spring return actuator | ② | ● | ● | ● | ● | ● | ● | ● | |||||||
XC3 | V | Integral | Spring return actuator | ③ | ● | ● | ● | ● | ● | ● | ● | |||||||
Universal controller | Static | |||||||||||||||||
BP1 | V | MP bus | Separate part | Actuator, torque for TVT | ② | ● | ||||||||||||
BP3 | V | MP bus | Separate part | Actuator | ② | ● | ● | ● | ● | ● | ● | ● | ● | |||||
BPB | V | MP bus | Separate part | Spring return actuator | ② | ● | ● | ● | ● | ● | ● | ● | ● | |||||
BPG | V | MP bus | Separate part | Fast-running actuator | ② | ● | ● | ● | ● | ● | ● | ● | ● | ● | ||||
BB1 | V | Separate part | Actuator, torque for TVT | ② | ● | |||||||||||||
BB3 | V | Separate part | Actuator | ② | ● | ● | ● | ● | ● | ● | ● | ● | ||||||
BBB | V | Separate part | Spring return actuator | ② | ● | ● | ● | ● | ● | ● | ● | |||||||
XD1 | V | Integral | Actuator | ③ | ● | ● | ● | ● | ● | ● | ● | ● | ||||||
XD3 | V | Integral | Spring return actuator | ③ | ● | ● | ● | ● | ● | ● | ● | ● | ||||||
BR1 | Δp | MP bus | 100 Pa | Actuator, torque for TVT | ② | ● | ||||||||||||
BR3 | Δp | MP bus | 100 Pa | Actuator | ② | ● | ● | ● | ● | ● | ● | ● | ||||||
BRB | Δp | MP bus | 100 Pa | Spring return actuator | ② | ● | ● | ● | ● | ● | ● | ● | ● | |||||
BRG | Δp | MP bus | 100 Pa | Fast-running actuator | ② | ● | ● | ● | ● | ● | ● | |||||||
BS1 | Δp | MP bus | 600 Pa | Actuator, torque for TVT | ② | ● | ||||||||||||
BS3 | Δp | MP bus | 600 Pa | Actuator | ② | ● | ● | ● | ● | |||||||||
BSB | Δp | MP bus | 600 Pa | Spring return actuator | ② | ● | ● | ● | ● | |||||||||
BSG | Δp | MP bus | 600 Pa | Fast-running actuator | ② | ● | ● | ● | ● | |||||||||
BG1 | Δp | 100 Pa | Actuator, torque for TVT | ② | ● | |||||||||||||
BG3 | Δp | 100 Pa | Actuator | ② | ● | ● | ● | ● | ● | ● | ● | |||||||
BGB | Δp | 100 Pa | Spring return actuator | ② | ● | ● | ● | ● | ● | ● | ● | ● | ||||||
BH1 | Δp | 600 Pa | Actuator, torque for TVT | ② | ● | |||||||||||||
BH3 | Δp | 600 Pa | Actuator | ② | ● | ● | ● | |||||||||||
BHB | Δp | 600 Pa | Spring return actuator | ② | ● | ● | ● | ● | ||||||||||
XE1 | Δp | Integral, 100 Pa | Actuator | ③ | ● | ● | ● | ● | ● | ● | ● | ● | ||||||
XE3 | Δp | Integral, 100 Pa | Spring return actuator | ③ | ● | ● | ● | ● | ● | ● | ● | ● | ||||||
XF1 | Δp | Integral, 600 Pa | Actuator | ③ | ● | ● | ● | ● | ||||||||||
XF3 | Δp | Integral, 600 Pa | Spring return actuator | ③ | ● | ● | ● | ● |
① TROX, ② TROX/Belimo, ③ TROX/Gruner, ④ Sauter, ⑤ Siemens
☒ order code detail, V volume flow rate, Δp differential pressure
Attachments: LABCONTROL control components
Easylab controller | Static | ||||||||||||||
Elab | Room supply air Room extract air Room pressure Single controller | TCU3 | Integral | Fast-running actuator | ● | ● | ● | ||||||||
Elab | Room supply air Room pressure Single controller | TCU3 | Integral | Fast-running actuator | ● | ● | |||||||||
Elab | Room extract air Room pressure Single controller | TCU3 | Integral | Fast-running actuator | ● | ● | |||||||||
Elab | Room supply air Room extract air Room pressure Fume cupboard Single controller | TCU3 | Integral | Fast-running actuator | ● | ● | |||||||||
Electronic controller | Static | ||||||||||||||
TMA | Room supply air Room extract air Room pressure | TCU-LON-II with LonWorks interface | Integral | Fast-running actuator | ● | ● | ● | ||||||||
TMB | Fast-running actuator (brushless motor) | ● | ● | ● | |||||||||||
TMA | Room supply air Room pressure | TCU-LON-II with LonWorks interface | Integral | Fast-running actuator | ● | ● | |||||||||
TMB | Fast-running actuator (brushless motor) | ● | ● | ||||||||||||
TMA | Room extract air Room pressure | TCU-LON-II with LonWorks interface | Integral | Fast-running actuator | ● | ● | |||||||||
TMB | Fast-running actuator (brushless motor) | ● | ● | ||||||||||||
TMA | Room supply air Room extract air Room pressure Fume cupboard | TCU-LON-II with LonWorks interface | Integral | Fast-running actuator | ● | ● | |||||||||
TMB | Fast-running actuator (brushless motor) | ● | ● |
mm | mm | mm | mm | |
TVR-Ex/.../TEx kg |
TVR-Ex/.../Pxx kg | |
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Installation and commissioning
Electronic control
Pneumatic control
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 required
125 | 600 | 220 | 300 |
160 | 600 | 220 | 300 |
200 | 600 | 310 | 300 |
250 | 600 | 310 | 300 |
315 | 600 | 460 | 300 |
400 | 600 | 460 | 300 |
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 %)
Vmin unit [m³/h] and [l/s]
Technically possible minimum volume flow rate
Vmax [m³/h] and [l/s]
Upper limit of the operating range for the VAV terminal unit that can be set by customers
Vmin [m³/h] and [l/s]
Lower limit of the operating range for the VAV terminal unit that can be set by customers
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
Construction
Galvanised sheet steel
Powder-coated surface (P1)
Stainless steel (A2)
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Contact
We are here for you
Please specify your message and type of request.
Tel.: +91 (0) 22 6775-1600 | Fax: +91 (0) 226775-1613
Contact
Thank you for your message!
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