Type TVLK

VAV terminal unit, variant TVLK, with nozzle and flange

Tested to VDI 6022

For all upstream conditions

Variant with bluff body and flange

Variant with nozzle and connecting circular spigot

Easy cleaning of sensor tubes

TVLK

OPTIMISED FOR USE IN LABORATORIES AND ON FUME CUPBOARDS

Plastic circular VAV terminal units for aggressive extract air in laboratories and production facilities

Casing and damper blade made of flame-resistant polypropylene
Compact construction, only 400 mm long
High control accuracy even in case of unfavourable upstream conditions
Combination with fast-running actuators (air management systems)
Volume flow rate measurement with bluff body or nozzle
Slide-out sensor tubes allow for easy cleaning
Closed blade air leakage to EN 1751, class 4
Casing air leakage to EN 1751, class C

Optional equipment and accessories

With flanges on both ends
Plastic secondary silencer Type CAK for the reduction of air-regenerated noise

Application

Application

Circular LABCONTROL VAV terminal units of Type TVLK, made of plastic, to control the volume flow rate of fume cupboards and fume hoods
Suitable for contaminated air
Closed-loop volume flow control using an external power supply
Shut-off by means of switching (equipment supplied by others)

Special characteristics

High control accuracy even in case of unfavourable upstream conditions
Integral slide-out differential pressure sensor with 3 mm measuring holes (resistant to dust and pollution)
No metal parts come into contact with the airflow
Factory set-up or programming and aerodynamic function testing
Volume flow rate can be measured and subsequently adjusted on site; additional adjustment tool or configuration software may be necessary

Nominal sizes

Bluff body: 250 – 100, 250 – 160
Nozzle: 250 – D08, 250 – D10, 250 – D16
Bluff body available in two sizes and nozzle available in three sizes for different volume flow rate ranges

Description

Variants

TVLK: VAV terminal unit
TVLK-FL: VAV terminal unit with flanges on both ends

Parts and characteristics

Ready-to-commission unit which consists of mechanical parts and control components (attachments)
Averaging differential pressure sensor for volume flow rate measurement; can be removed for cleaning
Damper blade
Factory assembled control components (attachments) complete with wiring and tubing
Aerodynamic functional testing on a special test rig prior to shipping of each unit
Unit carries test label with relevant data

Attachments

LABCONTROL: Control components (attachments) for air management systems
Universal controller: Controller, differential pressure transducer and actuators for special applications

Accessories

Matching flanges for both ends, including seals

Useful additions

Plastic secondary silencer Type CAK for demanding acoustic requirements

Construction features

Circular casing
Short casing: 392 mm without flange, 400 mm with flange
Spigot suitable for ducts according to DIN 8077
Both spigots with same diameter (250 mm)
Position of the damper blade indicated externally at shaft extension

Materials and surfaces

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

Standards and guidelines

Hygiene conforms to VDI 6022
Closed blade air leakage to EN 1751, class 4
Meets 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
Zero point correction of the static differential pressure transducer should be carried out once per year (recommendation)

Technical information

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

Schematic illustration of the TVLK 00137305_0

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

Functional description

For measuring the volume flow rate the VAV terminal unit is fitted either with a bluff body and a differential pressure sensor or with a nozzle.

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.

Fume cupboard control: The volume flow rate setpoint depends on the control strategy for the fume cupboard and is based on the face velocity, the sash position, or a constant value.
Volume flow control: The volume flow rate setpoint comes from an external unit.

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.

TVLK with EASYLAB, volume flow rate ranges and minimum differential pressures

Nominal size	V l/s	V m³/h	① ∆p_{st min} Pa	② ∆p_{st min} Pa	③ ∆p_{st min} Pa	④ ∆p_{st min} Pa	∆V ± %
250-100	55	198	5	5	5	5	10
250-100	140	504	15	15	15	15	7
250-100	220	792	35	35	35	35	6
250-100	360	1296	85	85	85	90	5
250-160	30	108	5	5	5	5	10
250-160	80	288	25	25	25	25	7
250-160	120	432	50	50	50	50	6
250-160	195	702	130	130	130	130	5
250-D08	95	342	5	5	5	5	10
250-D08	210	756	10	10	10	10	7
250-D08	315	1134	20	20	20	20	6
250-D08	515	1854	45	50	55	55	5
250-D10	55	198	5	5	5	5	10
250-D10	140	504	10	10	10	10	7
250-D10	220	792	20	20	20	20	6
250-D10	360	1296	50	50	55	55	5
250-D16	30	108	5	5	5	5	10
250-D16	80	288	15	15	15	15	7
250-D16	120	432	30	30	30	30	6
250-D16	195	702	70	70	75	75	5

TVLK with Universal controller, volume flow rate ranges and minimum differential pressures

Nominal size	V l/s	V m³/h	① ∆p_{st min} Pa	② ∆p_{st min} Pa	③ ∆p_{st min} Pa	④ ∆p_{st min} Pa	∆V ± %
250-100	65	234	5	5	5	5	10
250-100	180	648	25	25	25	25	7
250-100	290	1044	55	55	55	60	6
250-100	360	1296	85	85	85	90	5
250-160	35	126	5	5	5	5	10
250-160	100	360	35	35	35	35	7
250-160	160	576	90	90	90	90	6
250-160	195	702	130	130	130	130	5
250-D08	95	342	5	5	5	5	10
250-D08	210	756	10	10	10	10	7
250-D08	315	1134	20	20	20	20	6
250-D08	515	1854	45	50	55	55	5
250-D10	65	234	5	5	5	5	10
250-D10	180	648	15	15	15	15	7
250-D10	290	1044	35	35	35	35	6
250-D10	360	1296	50	50	55	55	5
250-D16	35	126	5	5	5	5	10
250-D16	100	360	20	20	20	20	7
250-D16	160	576	50	50	50	50	6
250-D16	195	702	70	70	75	75	5

Nominal sizes	250 mm
Volume flow rate range	30 – 515 l/s or 108 – 1854 m³/h
Volume flow rate control range	Approx. 15 to 100% of the nominal volume flow rate
Minimum differential pressure	5 – 130 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 V_min and V_max. 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.

TVLK with EASYLAB, Sound pressure level at differential pressure 150 Pa

Nominal size	V		Air-regenerated noise				Case-radiated noise
Nominal size	V		①	②	③	④	①
Nominal size	V		L_PA	L_PA1			L_PA2
Nominal size	l/s	m³/h	dB(A)
250-100	55	198	40	33	29	26	26
250-100	140	504	46	38	34	31	33
250-100	220	792	47	39	35	31	37
250-100	360	1296	48	39	35	32	42
250-160	30	108	37	32	28	25	22
250-160	80	288	41	35	31	28	29
250-160	120	432	43	37	33	30	32
250-160	195	702	49	42	38	35	40
250-D08	95	342	36	26	23	20	23
250-D08	210	756	40	31	27	24	29
250-D08	315	1134	41	32	29	26	33
250-D08	515	1854	44	34	31	28	38
250-D10	55	198	36	28	24	21	24
250-D10	140	504	42	34	30	27	31
250-D10	220	792	43	35	31	28	35
250-D10	360	1296	45	37	33	29	38
250-D16	30	108	33	28	24	22	21
250-D16	80	288	39	33	30	28	28
250-D16	120	432	42	36	33	30	31
250-D16	195	702	47	42	38	36	38

① TVLK

② TVLK with circular silencer CAK, insulation thickness 50 mm, length 500 mm

③ TVLK with circular silencer CAK, insulation thickness 50 mm, length 1000 mm

④ TVLK with circular silencer CAK, insulation thickness 50 mm, length 1500 mm

TVLK with VARYCONTROL Universal controller, Sound pressure level at differential pressure 150 Pa

Nominal size	V		Air-regenerated noise				Case-radiated noise
Nominal size	V		①	②	③	④	①
Nominal size	V		L_PA	L_PA1			L_PA2
Nominal size	l/s	m³/h	dB(A)
250-100	65	234	41	34	30	27	27
250-100	180	648	46	38	34	31	35
250-100	290	1044	47	39	35	31	40
250-100	360	1296	48	39	35	32	42
250-160	35	126	38	33	29	26	23
250-160	100	360	42	36	32	29	30
250-160	160	576	45	37	34	31	34
250-160	195	702	49	42	38	35	40
250-D08	95	342	36	26	23	20	23
250-D08	210	756	40	31	27	24	29
250-D08	315	1134	41	32	29	26	33
250-D08	515	1854	44	34	31	28	38
250-D10	65	234	37	30	26	22	25
250-D10	180	648	43	35	31	28	33
250-D10	290	1044	44	36	32	29	36
250-D10	360	1296	45	37	33	29	38
250-D16	35	126	34	29	25	23	22
250-D16	100	360	41	35	32	29	30
250-D16	160	576	43	37	34	32	32
250-D16	195	702	47	42	38	36	38

① TVLK

② TVLK with circular silencer CAK, insulation thickness 50 mm, length 500 mm

③ TVLK with circular silencer CAK, insulation thickness 50 mm, length 1000 mm

④ TVLK with circular silencer CAK, insulation thickness 50 mm, length 1500 mm

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 aggressive media since 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 differential 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.

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

Spigot, suitable for ducts according to DIN 8077.

Position of the damper blade indicated externally at shaft extension.

Closed blade air leakage to EN 1751, class 4.

Casing air leakage to EN 1751, class C.

Special characteristics

High control accuracy even in case of unfavourable upstream conditions
Integral slide-out differential pressure sensor with 3 mm measuring holes (resistant to dust and pollution)
No metal parts come into contact with the airflow
Factory set-up or programming and aerodynamic function testing
Volume flow rate can be measured and subsequently adjusted on site; additional adjustment tool or configuration software may be necessary

Materials and surfaces

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

Technical data

Nominal sizes: 250 mm
Volume flow rate range: 30 to 515 l/s or 108 to 1854 m³/h
Volume flow rate control range: approx. 15 – 100 % of the nominal volume flow rate
Minimum differential pressure: 5 – 130 Pa
Maximum differential pressure: 1000 Pa

Attachments

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

Supply voltage 24 V AC
Fast and stable control
Static differential 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

V _______________________ [m³/h]
Δp_st _______________________ [Pa]

Air-regenerated noise

L_PA _______________________ [dB(A)]

Case-radiated noise

L_PA _______________________ [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.

                                                                              Type
                                                                                                                                                                  TVLK       VAV terminal unit, plastic

                                                                              Flange
                                                                                    No entry: none
                                                                                                                                                                  FL       Flanges on both ends

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

                                                                              Accessories
                                                                                    No entry: none
                                                                                                                                                                  GK       Matching flanges for both ends

                                                                              Attachments (control component)
                                                                                                                                                                  BB3       Universal controller with static differential pressure transducer
                                                                                                                                                                  BP3       Universal controller with MP bus interface and static differential pressure transducer
                                                                                                                                                                  BPG       Universal controller with MP bus interface and static differential pressure transducer, fast-running actuator

                                                                              Operating mode
                                                                                                                                                                  E       Single
                                                                                                                                                                  M       Master
                                                                                                                                                                  S       Slave
                                                                                                                                                                  F       Constant value

                                                                              Signal voltage range
                                                                                    For the actual and setpoint value signals
                                                                                                                                                                  0       0 – 10 V DC (only BP3 and BPG)
                                                                                                                                                                  2       2 – 10 V DC

                                                                              Volume flow rates [m³/h or l/s]
                                                                                    V_min – V_max for factory setting

Order example: TVLK/250-D16/BPG/E2/150-650

Nominal size	250 with nozzle D16
Attachment	Universal controller with MP bus interface and static differential pressure transducer, fast-running actuator
Operating mode	Single
Operating values	150 – 650 m³/h

Order example: TVLK/250–100/ELAB/FH–VS/200–900 m³/h

Nominal size	250 with bluff body 100
Attachment	EASYLAB controller with fast-running actuator
Equipment function	Fume cupboard control with face velocity transducer
Volume flow rate	200 – 900 m³/h

Order example: TVLK/250-D08/ELAB/E2/400-1600

Nominal size	250 with nozzle D08
Attachment	EASYLAB controller TCU3 with fast-running actuator
External volume flow rate setting	Voltage signal 2 – 10 V DC
Operating values	400 – 1600 m³/h

Attachments
Type Universal, static
Type EASYLAB TCU3

Additional products
Type CAK

Variants, Attachments, Dimensions and weight

VAV terminal unit, variant TVLK, with bluff body and connecting circular spigot

TVLK

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

TVLK-FL

VAV terminal unit for the control of variable air volume flow rates
With flanges to make detachable connections to the ductwork

TVLK, VARYCONTROL control components

Order code detail	Controlled variable	Controller	Differential pressure transducer	Actuator
Universal controller, static
BP3	Volume flow rate	Universal controller with MP bus interface TROX/Belimo	Static, integral	Actuator
BPG	Volume flow rate	Universal controller with MP bus interface TROX/Belimo	Static, integral	Fast-running actuator
BB3	Volume flow rate	Universal controller TROX/Belimo	Static, integral	Actuator

TVLK, LABCONTROL control components

Order code detail	Controlled variable	Controller	Differential pressure transducer	Actuator
EASYLAB
ELAB	Fume cupboard Room supply air Room extract air Room pressure Single controller	EASYLAB controller TCU3	Static, integral	Fast-running actuator

Attachments: VARYCONTROL control components

☒

Controlled variable

Interface

V_min -/ V_max - adjustment

Differential pressure transducer

Actuator

Manufacturer

LVC

TVR

TVJ

TVT

TZ-S

TA-S

TVZ

TVA

TVM

TVRK

TVLK

Easy controller

Dynamic

Easy

Integral

①

●

Compact controller

Dynamic

BC0

MP bus

Integral

②

●

BF0

MP bus

Integral

②

●

BL0

LonWorks

Integral

②

●

BM0

Modbus

Integral

②

BM0-J6

Modbus and plug-in connecting cable

Integral

②

XG0

Integral

③

●

XB0

Integral

③

●

LN0

Integral

⑤

●

LK0

KNX

⑤

LY0

Integral

⑤

●

Compact controller

Static

SA0

Integral

④

SC0

Δp

Integral

Fast-running actuator, integral

④

Universal controller

Dynamic

B11

Integral

Actuator, torque for TVT

②

●

B13

Integral

Actuator

②

●

B27

Integral

Actuator

②

●

B1B

Integral

Spring return actuator

②

●

XC3

Integral

Spring return actuator

③

●

Universal controller

Static

BP1

MP bus

Separate part

Actuator, torque for TVT

②

●

BP3

MP bus

Separate part

Actuator

②

●

BPB

MP bus

Separate part

Spring return actuator

②

●

BPG

MP bus

Separate part

Fast-running actuator

②

●

BB1

Separate part

Actuator, torque for TVT

②

●

BB3

Separate part

Actuator

②

●

BBB

Separate part

Spring return actuator

②

●

XD1

Integral

Actuator

③

●

XD3

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

☒

Controlled variable

Interface

V_min -/ V_max - adjustment

Differential pressure transducer

Actuator

TVR

TVJ

TVT

TZ-S

TA-S

TVZ

TVA

TVRK

TVLK

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)

●

TVLK

Nominal size	m kg
250	5.1

Nominal size	m kg
250	5.7

Installation details, Basic information and nomenclature

Bend

A bend with a centre line curvature radius of at least 1D – without an additional straight duct section upstream of the VAV terminal unit – has only a negligible effect on the volume flow rate accuracy.

Installation and commissioning

Installation orientation must be as shown on the sticker

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	①	②	③
Attachments	mm
VARYCONTROL
Universal controller	300	320	300

Space requirement, control components on two sides

Attachments	①	②	③	④	⑤	⑥
Attachments	mm
LABCONTROL
EASYLAB	350	350	400	300	250	300

Space required for cleaning the sensor tubes

Nominal size	①	②	③
Nominal size	mm
250-1 Bluff body**	100	160	D
250-D Nozzle**	100	160	100

D: Casing diameter

Definition of noise

① Air-regenerated noise
② Case-radiated noise

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

f_m [Hz]

Octave band centre frequency

L_PA [dB(A)]

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

L_PA1 [dB(A)]

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

L_PA2 [dB(A)]

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

L_PA3 [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

V_nom [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. V_max)
Upper limit of the setting range and maximum volume flow rate setpoint value for the VAV terminal unit

V_{min 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 V_{min unit} (if V_min equals zero) may result in unstable control or shut-off

V_max [m³/h] and [l/s]

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

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

V_min [m³/h] and [l/s]

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

V_min should be smaller than or equal to V_max
Do not set V_min smaller than V_{min unit}, otherwise the control may become unstable or the damper blade may close
V_min may equal zero
In case of analogue signalling to volume flow controllers (which are typically used), the set minimum value (V_min) 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

ΔV_warm [± %]

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

Differential pressure

Δp_st [Pa]

Static differential pressure

Δp_st 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

Downloads

product information

Print page Type TVLK
Product data sheet Type TVLK

Product data sheet 6 MB pdf

certificates

Declaration of conformity or declaration of incorporation Type TVLK

CE_VVS_DE_en Declaration of conformity or declaration of incorporation 200 KB pdf
Declaration of conformity or declaration of incorporation Type TVLK

CE/2010-12/TVLK/DE/en Declaration of conformity or declaration of incorporation 66 KB pdf
Declaration of hygiene conformity Type TVLK

TVLK_HC_2020_06_09_DE_en Hygiene certificate 2,2 MB pdf

operation manuals

Installation and commissioning manual – VAV terminal units

IM_2020_03_A00000071368_VVS_V2_GB_en 6,6 MB pdf
Installation manual Type VVS-Regelgeräte

A00000066402 Installation manual 1,4 MB pdf

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Downloads

product information

Print page Type TVLK

Product data sheet Type TVLK

certificates

Declaration of conformity or declaration of incorporation Type TVLK

Declaration of conformity or declaration of incorporation Type TVLK

Declaration of hygiene conformity Type TVLK

operation manuals

Installation and commissioning manual – VAV terminal units

Installation manual Type VVS-Regelgeräte

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