TVLK | TROX Malaysia Sdn Bhd.

TVL

FOR NORMAL AND HIGH VOLUME FLOW RATE RANGE

Rectangular 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)

■ High control accuracy

■ For volume flow rate ranges up to 36,360 m3/h or 10,000 l/s

■ Suitable for airflow velocities up to 10 m/s

■ Operation pressure 50 to 1000 Pa

Optional equipment and accessories

■ Secondary silencer Type TX for the reduction of air-regenerated noise

■ Hot water heat exchanger of Type WT for reheating the airflow

General information

Construction features

– Rectangular casing

– Aerofoil type damper blade in an opposed blade configuration.

– Position of the damper blade indicated externally at shaft extension

Materials and surfaces

Galvanized sheet steel construction

– Casing made of galvanized sheet steel

– Shaft made of galvanized steel

– Damper blades and differential pressure sensor made of aluminum

– Sintered bronze bearings

Mineral wool

_ Internal fibre glass insulation lining.

– Faced with woven glass fabric as protection against fibre erosion through airflow velocities of up to 20 m/s

– Resistant to fungal and bacterial growth

Installation and commissioning

– Damper blades have to be horizontal

– Return edges of the casing with drilled holes suitable for M8 threaded rods

Technical information

① Nozzle (optional)
② EASYLAB control component
③ Casing
④ Actuator
⑤ Bluff body and sensor tubes

The VAV terminal unit is fitted with an effective pressure sensor
with a bluff body or a nozzle for measuring the volume flow rate.
The control components (attachments) include an effective
pressure transducer that transforms the effective pressure into
an electric signal, a controller, and an actuator. 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.

Setpoint value default setting

Fume cupboard control

The volume flow rate setpoint depends on the control strategy for the fume cupboard:
Face velocity
Sash distance
Combination of face velocity and sash distance
Using switch contacts (2-point, 3-point)
Constant value

Volume flow control

The volume flow rate setpoint is specified by an external setpoint value setting

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

Specification text

Circular VAV terminal units made of flame-resistant plastic, for variable air volume systems and fume cupboards. Suitable for the control of extract air containing hazardous particles, as all components coming into contact with the airflow are made of plastic (no interior metal parts). Ready-to-commission unit which consists of the mechanical parts and the electronic control components (attachments). Each unit contains an averaging effective pressure sensor with bluff body or a nozzle for volume flow rate measurement, and a damper blade. Factory assembled control components (attachments) complete with wiring and tubing. Effective pressure sensor with 3 mm measuring holes, hence resistant to contamination. Position of the damper blade indicated externally at shaft extension. The damper blade is factory set to open position, which allows a ventilation airflow even without control. Meets the hygiene requirements of EN 16798, Part 3, of VDI 6022, Sheet 1, and of DIN 1946, Part 4.

Special features

High control accuracy even in case of unfavourable upstream conditions
Integral effective pressure sensor with 3 mm measuring holes (resistant to dust and pollution)
Construction with bluff body: Slide-out sensor tubes allow for easy inspection and cleaning
No metal parts come into contact with the airflow
Factory set-up or programming and aerodynamic function testing
Configuration and subsequent parameter setting for the control component can be done with the EasyConnect configuration software

Materials and surfaces

Casing and damper blade made of flame-resistant polypropylene (PP), flammability to UL 94, V-0
Effective pressure sensor (bluff body or Venturi nozzle) and plain bearings made of polypropylene (PP)
Damper blade seal made of thermoplastic elastomers (TPE)

Technical data

Nominal sizes: 250 mm
Volume flow rate range: 30 – 546 l/s or 108 – 1967 m³/h
Volume flow rate control range: approx. 15 – 100 % of the nominal volume flow rate
Minimum differential pressure: Up to 139 Pa (without circular silencer)
Maximum differential pressure: 1000 Pa
Closed blade air leakage to EN 1751, class 4
Casing air leakage to EN 1751, class C

Specification text for attachment

Variable volume flow control with an electronic EASYLAB controller for fume cupboards

Supply voltage 24 V AC/DC
Fast and stable control
Static effective pressure measurement
Fast-running actuator
Easy commissioning due to plug and play communication system
Controller is a modular system and can be expanded
Volume flow rate monitoring

Sizing data

qᵥ _______________________ [m³/h]
Δpst _______________________[Pa]

Air-regenerated noise

LPA _______________________[dB(A)]

Case-radiated noise

LPA _______________________[dB(A)]

1 Type
TVLK VAV terminal unit, plastic

2 Duct connection
No entry: Spigot
FL Flanges on both ends

3 Nominal size
250 – 100 Bluff body 100
250 – 160 Bluff body 160
250 – D08 Nozzle D08
250 – D10 Nozzle D10
250 – D16 Nozzle D16

4 Accessories
No entry: None
GK Matching flanges for both ends

5 Attachments (control component)
ELAB EASYLAB controller TCU3

6 Actuators
S Fast-running actuator (3 s)
SD Fast-running actuator (3 s), with digital communication
interface (TROX HPD)

7 Equipment function
Fume cupboard control

With face velocity transducer
FH-VS Face velocity control strategy

With face velocity transducer and sash distance sensor
FH-VD Optimised face velocity control strategy

With sash distance sensor
FH-DS Linear control strategy
FH-DV Safety-optimised control strategy

With switch contacts (by others) for switching steps
FH-2P 2 switching steps
FH-3P 3 switching steps

Without signalling
FH-F Volume flow rate constant value control

8 Expansion modules
Option 1: Supply voltage
No entry: 24 V AC/DC
T EM-TRF for 230 V AC
U EM-TRF-USV for 230 V AC, provides uninterruptible power
supply (UPS)

Option 2: Digital communication interface
No entry: None
B EM-BAC-MOD-01 for BACnet MS/TP
M EM-BAC-MOD-01 for Modbus RTU
I EM-IP for BACnet/IP, Modbus/IP and web server
R EM-IP with real time clock

Option 3: Automatic zero point correction
No entry: None
Z EM-AUTOZERO Solenoid valve for automatic zero point
correction

Option 4: Lighting
No entry: None
S EM-LIGHT Wired socket for the connection of lighting and for
switching the lighting on/off using the control panel (only with
EM-TRF or EM-TRF-USV)

9 Operating values [m³/h or l/s]
Depending on the equipment function
FH-VS: qᵥmin – qᵥmax
FH-VD: qᵥmin – qᵥmax
FH-DS: qᵥmin – qᵥmax
FH-DV: qᵥmin – qᵥmax
FH-2P: qᵥ1 /qᵥ2
FH-3P: qᵥ1 /qᵥ2
/qᵥ3
FH-F: qᵥ1

Useful additions
Control panel for fume cupboard controllers, for displaying the
functions of the control system according to EN 14175
BE-SEG-02 OLED display
BE-LCD 40-character display

Order example: TVLK-FL/250–100/GK/ELAB/S/FH-VS/200–900 m³/h

1 Type
TVLK VAV terminal unit, plastic

2 Duct connection
No entry: Spigot
FL Flanges on both ends

3 Nominal size
250 – 100 Bluff body 100
250 – 160 Bluff body 160
250 – D08 Nozzle D08
250 – D10 Nozzle D10
250 – D16 Nozzle D16

4 Accessories
No entry: None
GK Matching flanges for both ends

5 Attachments (control component)
ELAB EASYLAB controller TCU3

6 Actuators
S Fast-running actuator (3 s)
SD Fast-running actuator (3 s), with digital communication
interface (TROX HPD)

7 Equipment function
Single operation
EC Extract air controller

8 External volume flow rate setting
Depending on external volume flow rate setting
E0 Voltage signal 0 – 10 V DC
E2 Voltage signal 2 – 10 V DC
2P Switch contacts (provided by others) for 2 switching steps
3P Switch contacts (provided by others) for 3 switching steps
F Volume flow rate constant value, without signalling

9 Expansion modules
Option 1: Supply voltage
No entry: 24 V AC/DC
T EM-TRF for 230 V AC
U EM-TRF-USV for 230 V AC, provides uninterruptible power
supply (UPS)

Option 2: Digital communication interface
No entry: None
B EM-BAC-MOD-01 for BACnet MS/TP
M EM-BAC-MOD-01 for Modbus RTU
I EM-IP for BACnet/IP, Modbus/IP and web server
R EM-IP with real time clock

Option 3: Automatic zero point correction
No entry: None
Z EM-AUTOZERO Solenoid valve for automatic zero point
correction

10 Operating values [m³/h or l/s]
Depending on external volume flow rate setting:
E0, E2: qᵥmin/qᵥmax
2P: qᵥ1
/qᵥ2
3P: qᵥ1
/qᵥ2
/qᵥ3
F: qᵥ1

Order example: TVLK/250–D08/ELAB/S/E2/400–1600 m³/h

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product information

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