WILDEBOER VR1 Volume Flow Controller User Manual

USER MANUAL
AIR DISTRIBUTION
Volume flow controller
VR1

Contents hide

1 VR1 Volume Flow Controller

2 Product overview

3 Product features

4 Product description

9 Wildeboer makes it easy

10 Documents / Resources

10.1 References

VR1 Volume Flow Controller

▶ Trust you can build in.

Product portfolio:
Areas of application for circular volume flow controllers and limiters

Description	VR1	VR1-N	VRL1	VRE1	VRup / VRpro
Functional principle	Mechanical controller	Mechanical controller	Mechanical limiter	Electronic controller	Electronic controller
Pressure difference	50 .. 1000 Pa	30 … 600 Pa	30 … 300 Pa	20 … 1000 Pa	5 … 1000 Pa
Flow rate range	50 … 3100 m³/h	30 … 2300 m³/h	13 … 1060 m³/h	34 … 5430 m³/h	42 … 5430 m³/h
Nominal diameter	DN 80 … DN 315	DN 80 … DN 315	DN 80 … DN 250	DN 100 … DN400	DN 100 … DN400
Flow velocity	2.1. 15.5 m/s	1.1. 12.2 m/s	0.8 … 6 m/s	1.2 … 12 m/s	1.5 … 12 m/s
Control accuracy	±5 … ±10 % of set point flow rate	approx. ±5 % of nominal flow rate*	±5 … ±10 % of nominal flow rate	±5 … ±15 % of set point flow rate	±5 … ±20 % of set point flow rate
Operating temperature	-20 … +70 °C, short-term 90 °C	-20 … +70 °C, short-term 90 °C	+10 … +50 °C	+5 … +60 °C	0 … +50 °C
Further information	In this document	LINK	LINK	LINK	LINK

* or ±10 % from set point flow rate (depending on which deviation is greater)

Product overview

VR1 volume flow controllers are maintenance-free, mechanically self-actuating controllers for supply air and exhaust air ducts with constant flow rates that operate without any auxiliary power supply. They are used especially at low flow velocities and variable pressures to keep the flow rate constant as per the set point value. The flow rate is set using a manual setting device with pointer, scale and locking mechanism. As an option, the VR1 can be fitted with a 24 V AC/DC or 230 V AC actuator for motorised set point adjustment for applications with variable flow rates.

Highest control accuracy at variable pressures

Factory preset for the set point flow rate
Adjustable on site

Position-independent installation
Maintenance-free design

Sizes DN 80 to DN 315
Casing tightness: Class C as per DIN EN 1751

Volume flow range: 50 … 3100 m³/h
Pressure range: 50 … 1000 Pa

Flow velocities: 2.1 … 15.5 m/s
Temperature range: -20 … +70 °C, short-term +90 °C

Hygiene certificate:
VDI 6022-1, VDI 3803-1, DIN 1946-4, DIN EN 16798-3, SWKI VA104-01, SWKI VA105-01, ÖNORM H6020, ÖNORM H6021
Environment Product Declaration: EPD-WIL-20150036-ICA-EN

Options
• Reversible actuator with 2-point and 3-point control for setting to two flow rate set points, 230 V AC or 24 V AC/DC
• Continuously adjustable reversible actuator for setting to any flow rate set point, 24 V AC/DC
• Acoustic insulation with sheet metal jacket
• SRC duct silencer in lengths: 600 mm and 900 mm
• Lip seals at both ends

Product features

1 Dimensions

Nominal diameter [DN]
80	100	125	160	200	250	315

2 Lip seal

For airtight connection to ventilation ducts
Optional accessories pre-assembled at the factory or for on-site installation

3 Set point adjustment
Manual (basic version)

Manual setting device with setting pointer, scale and locking mechanism:
The flow rate set point values are set manually using the setting pointer within the ranges . The controllers are adjusted at the factory for the entire volume flow range.
The VR1 can be preset at the factory before delivery For this purpose, the flow rate set point values must be specified when ordering. Subsequent adjustment on site is possible.
Pre-installed at the factory before delivery

Actuator-driven (optional version)

M1:
Reversible actuator 230 V AC with 2-point and 3-point control.
The corresponding motor limit stops are positioned in order to adjust the flow rates.
Optional accessories pre-assembled at the factory or for on-site installation

M2:
Reversible actuator 24 V AC/ DC with 2-point and 3-point control.
The corresponding motor limit stops are positioned in order to adjust the flow rates.
Optional accessories pre-assembled at the factory or for on-site installation

M3:
Continuously adjustable reversible actuator 24 V AC/DC
To adjust the flow rates, a reference signal is used from 0 … 10 V.
Optional accessories pre-assembled at the factory or for on-site installation

For details, please refer to ▶ Page 16.

4 Accessories

Acoustic insulation with sheet metal casing to reduce the external sound radiation of the volume flow controller (radiated noise)
Optional accessories pre-assembled at the factory or for on-site installation

For details, please refer to ▶ Page 7.

SRC duct silencer for reducing flow noise in the connected ventilation duct. Packing thickness:
50 mm mineral wool lengths:
◼ 600 mm
◼ 900 mm
Optional accessories for on-site installation

For details, please refer to ▶ Page 7.

Product description

The VR1 volume flow controller is made of galvanised steel. The damper blade which controls the flow rate is centrally supported and has stainless steel bearing shafts in special bushes. The manual setting device is fitted with a setting pointer, scale and locking mechanism. Flow rate set points can be adjusted manually or by actuator within the flow rate ranges

The special control mechanism ensures high control accuracy, so with variable pressures, the flow rate can be kept constant over the entire pressure range.
The adjustable volume flow set points depend on the nominal diameter of the VR1.

Item	Description
1	Duct casing
2	Label with scale and air direction indicator
3	Manual setting device with setting pointer, scale and locking mechanism
4	Lip seal (optional)
5	Acoustic insulation with sheet metal jacket (optional)
6	Damper blade

Size [DN]	⩒min [m³/h]	⩒max [m³/h]
80	50	280
100	70	380
125	120	600
160	150	900
200	250	1300
250	400	2100
315	600	3100

3.1 Area of application

The VR1 volume flow controller is used in supply air and exhaust air ducts of ventilation and air conditioning systems.

Notes

VR1 volume flow controllers are adjusted for the entire scaled application area.

The flow rate set point is set during installation by turning the setting pointer to the desired value on the scale and locking this setting. This does not affect the control accuracy.
Volume flow controllers that are preset at the factory can be installed directly. The flow rate set point can be changed at a later date by releasing the locking mechanism.
The VR1 volume flow controller and the optional SRC duct silencer are supplied separately. Assembly is carried out on site.

Installation and operating instructions for the VR1 are available on the Internet at www.wildeboer.de.

3.2 Function
The VR1 volume flow controller operates without any auxiliary power supply. The air flow in the ventilation duct generates a torque in the closing direction when it hits the damper blade. This torque is counterbalanced by the restoring torque of a blade spring so that the flow rate can be kept constant within the tolerances, even if the pressure differences change. Additional damping bellows ensures vibration-free movement of the damper blade.

3.3 Accessories
3.3.1 Acoustic insulation with sheet metal jacket
Acoustic insulation with a sheet metal jacket is supplied factory-mounted or for on-site installation.

Maximum possible reduction in radiated noise as a function of the nominal diameter:

DN	Reduction
80	-18 dB
100
125
160
200
250
315

3.3.2 SRC duct silencer
The SRC duct silencer is supplied separately. Assembly is carried out on site along with the volume flow controller.

Packing thickness: 50 mm mineral wool

Maximum possible reduction in flow noise as a function of the silencer length:

DN	Outer diameter [mm]	L [mm]
DN	Outer diameter [mm]	600	900
80	200	-22 dB	–
100	200	-22 dB	-25 dB
125	225	-22 dB	-25 dB
160	260	-21 dB	-24 dB
200	300	-19 dB	-24 dB
250	355	-18 dB	-22 dB
315	415	-15 dB	-19 dB

Quick dimensioning

The quick dimensioning table shows the expected sound power level of the VR1. Intermediate values can be interpolated for a rough estimate. The exact values for different differential pressures can be taken from the Wildeboer dimensioning software WiDim. ▶ WiDim

Sound level

Size	Flow rate	Flow velocity	Differential pressure	Flow noise	Radiated noise
[DN]	⩒ [m³/h]	v [m/s]	Dp [Pa]	Sound power level LWA [dB(A)]	Sound power level LWA [dB(A)]
80	50	2.8	75	38.97	<20
80	160	8.8	100	51.77	37.39
80	280	15.5	150	60.12	48.45
100	70	2.5	75	39.56	<20
100	220	7.8	100	52.05	35.43
100	380	13.4	150	60.2	46.86
125	120	2.7	75	41.95	25.15
125	360	8.1	100	53.97	39.14
125	600	13.6	150	61.75	47.66
160	150	2.1	75	41.38	28.87
160	525	7.3	100	54.6	40.12
160	900	12.4	150	62.57	47.01
200	250	2.2	75	43.57	31.99
200	750	6.6	100	55.35	40.82
200	1300	11.5	150	63.37	47.74
250	400	2.3	75	45.41	29.98
250	1200	6.8	100	57.15	42.85
250	2100	11.9	150	65.22	50.6
315	600	2.1	75	46.66	32.67
315	1800	6.4	100	58.32	45.69
315	3100	11.0	150	66.2	53.41

The sound power level of the radiated noise can be further reduced by using acoustic insulation.
The mean sound pressure level in the room is:

26 dB lower with acoustic insulation
8 dB lower without acoustic insulation

than the sound power levels specified in the nomograms LWA.
The sound pressure level can be further reduced by carrying out additional sound attenuation measures on site (suspended ceilings, high degree of room attenuation).
However, the acoustic insulation can only achieve the stated values if connected ventilation ducts are also suitably soundproofed (insulated).

The sound power level of the flow noise can be reduced by up to 25 dB by using an SRC duct silencer. ▶ Page 7.

Installation

The VR1 volume flow controller is installed regardless of the position and in the air direction indicated on the label. To ensure lasting functionality and leak tightness, stress-free installation in ventilation ducts is a prerequisite.

Space requirement
To enable the scale to be read and the commissioning and servicing work to be carried out, sufficient space should be kept free in the area of any attachments. Inspection openings of sufficient size may required so that the attachments are easily accessible.

Set point adjustment: manual	Set point adjustment: motorised

5.1 Distances to disturbance points
The stated control accuracy of △⩒ applies to a straight and disturbance-free inflow. Fittings such as bends, branches or changes in cross-section cause turbulence that can influence the flow rate measurement.
For the VR1 volume flow controller to work optimally, the flows must be largely free of disturbance. After flow disturbance points (e.g. bends or branches), the straight inlet and outlet sections shown as examples must be observed; longer inlet sections may be required where several disturbance points occur consecutively. Otherwise significant control deviations must be expected.

Bend connection

Branch-off from main duct

The specified control accuracy of △⩒ can only be achieved with at least 3 x DN straight flow path.
Note:
EN 1506 must be observed for the design of ventilation duct connections.

Technical Data

General data
Nominal diameter	DN 80, DN 100, DN 125, DN 160, DN 200, DN 250, DN 315
Flow rate range	50 … 3100 m³/h
Control range	Approx. 18 … 100 % of nominal flow rate
Control accuracy	±5 … ±10 % of set point flow rate
Differential pressure range	50 … 1000 Pa
Flow velocity	2.1. 15.5 m/s
Operating temperature	-20 … +70 °C, short-term +90 °C
Relative humidity	≤ 95 %, non-condensing
Casing tightness as per DIN EN 1751	Class C
Maintenance-free design	Yes
Materials
Casing + damper blade	Galvanised steel
Bearing shafls	Stainless steel

6.1 Dimensions

Nominal diameter [DN]	0d [mm]	L [mm]	L1 [mm]	X	AA [m²]
80	79	329	40	Manual: 65 mm Motorised: 130 mm	0.005
100	99	329	40		0.008
125	124	329	40		0.012
160	159	329	40		0.020
200	199	329	40		0.031
250	249	407	60		0.049
315	314	457	60		0.078

6.1.1 SRC duct silencer

Size [DN]	Outer diam. [mm]	L [mm]		L1 [mm]
80	200	600	–	40
100	200		900
125	225
160	260
200	300
250	355
315	415

6.2 Weights

Nominal diameter [DN]	VR1 [kg]	Acoustic insulation [kg]	Lip seal [g]	SRC duct silencer [kg]
Nominal diameter [DN]	VR1 [kg]	Acoustic insulation [kg]	Lip seal [g]	600 mm	900 mm
80	1.13	0.73	20	3.00	–
100	1.24	0.88	26	3.80	5.70
125	1.39	1.07	32	4.50	6.30
160	1.60	1.33	40	5.10	7.80
200	1.88	1.84	52	6.20	10.00
250	3.35	2.45	64	7.80	11.50
315	4.53	3.60	88	9.10	13.10

Actuator	Weight [g]
M1	660
M2	660
M3	630

6.3 Sound power level (flow noise)

Sound power level L WA [dB(A)]

Nomenclature

⩒	[m³/h]	Flow rate
AA	[m²]	Inflow cross-section
VA	[m/s]	Flow velocity in AA
△pS	[Pa]	Static pressure drop
△p	[Pa]	Differential pressure
LWA	[dB(A)]	A-weighted sound power level
LW-oct	[dB]	Octave sound power level LW-oct = LWA + DL
△L	[dB]	Relative sound power level to LWA
f	[Hz]	Octave mid-frequency
Lp	[dB]	Sound pressure level
LpA	[dB(A)]	A-weighted sound pressure level

Example:

The sound power levels of the flow noise can be further reduced by using the SRC duct silencer. Further information ▶ Page 7
The sound power levels inside the connecting duct are calculated in the nomograms as A-weighted overall levels LWA.
Corresponding octave sound power levels LW-oct for each size and for all operating points are derived from the Wildeboer dimensioning software ▶ WiDim; likewise the dimensioning with additional SRC duct silencer.

Important: The sound levels indicated in the nomograms are stated as sound power levels! They represent the sound energy introduced into the duct system. They are used for acoustic calculations, e.g. when adding sound attenuators.
Please note: In many cases, the sound pressure levels Lp or LpA are specified, which give attenuations of up to 16 dB. When comparing numerical values, always bear in mind the difference between the sound power level and sound pressure level. Furthermore, the degree of attenuation is only obtained with specific connected ducts, deflections, branches and rooms.

6.4 Sound power level (radiated noise)

Sound power level LWA [dB(A)]

The sound power levels of the radiated noise can be further reduced by using acoustic insulation. Further information ▶ Page 7

The sound pressure level can be further reduced by carrying out additional sound attenuation measures on site (suspended ceilings, high degree of room attenuation).

Nomenclature

6.5 Set point adjustment
6.5.1 Manual

In the basic version, VR1 volume flow controllers are designed for manual adjustment of the flow rate set point and operate without any auxiliary power supply. The volume flow set point is preselected on an adjusting device and, with variable pressures, is kept constant to a high degree of accuracy. The volume flow controllers are adjusted at the factory for the entire volume flow range.

6.5.2 Motorised
As an option, the set point adjustment can be motorised via factory-mounted electric actuators. Reversible actuators and continuously controllable reversible actuators are available for this.

Reversible actuators (M1, M2) open and close the volumetric flow controllers with 230 V AC voltage or 24 V DC or AC voltage.
The M1 (230 V AC) and M2 (24 V AC/DC) actuators enable 2-point and 3-point control. The corresponding motor limit stops are positioned in order to adjust the two flow rates. As delivered, the two limit stops of the actuators are set to the 0 direction of travel and the largest possible angle of rotation. The maximum angle of rotation corresponds to the largest possible flow rate set point, and the minimum is equivalent to a “cutoff” at a residual leakage that is significantly lower than the minimum flow rate. This can be extended to give 3-point control using an additional 0 circuit arrangement.
When operated in this way, the actuator remains in its current position and the VR1 volume flow controller adjusts the corresponding set point.

Continuously adjustable reversible actuator (M3) with 24 V AC/DC sets the volume flow controllers to any desired position.
The position is specified by means of a command signal of 0 or 2 to 10 V, position feedback via an output signal of 2 to 10 V.
The M3 (24 V AC/DC) actuator enables continuous set point adjustment. The actuator is controlled with a setting voltage of Y = 0 … 10 V DC and moves to the position specified by the control signal; however, the operating range of the motor only starts at 2 V. The flow rate set point changes almost linearly with the setting voltage. As delivered, the actuator is set to 0 direction of travel and the adjustable mechanical limit stops are set for the largest possible angle of rotation, which means that when Y = 10 V, the maximum angle of rotation corresponds to the maximum volume flow set point, and at 0…2 V the minimum angle of rotation is approached; this corresponds to a “cutoff” at a residual leakage that is significantly lower than the minimum volume flow set point. The purpose of the checkback voltage U = 2 … 10 V DC is to provide an electric indication of the volume flow set point setting and to serve as a subsequent actuating signal for other actuators.

Notes

All the actuators are overload-proof, do not require limit switches, and stop automatically at the limit stop.
In the event of a power failure or interruption, the current actuator position is retained.
The direction of travel of all the adjusting actuators can be reversed via a pushbutton on the motor.

Presetting
Depending on the nominal diameter, the flow rate set point can be preset at the factory in the following increments.

Nominal diameter [DN]	Flow rate set pointmin	Flow rate set pointmax	Increments
80	50	280	10
100	70	380	10
125	120	600	20
160	150	900	25
200	250	1300	50
250	400	2100	100
315	600	3100	100

Electrical connection

M1: 2- point control	M1: 3- point control

M1: Direction of travel	M2: 2- point control

M2: 3- point control	M2: Direction of travel

M3: Continuous control	M3: Direction of travel M3: Direc

Specification text

Maintenance-free, circular volume flow controller for position-independent installation in circular ventilation ducts for supply and exhaust air in ventilation and air conditioning systems. Casing and control mechanism made of galvanized sheet steel, with acoustic insulation, with lip seals. With centrally supported damper blade for volume flow control, with stainless steel bearing shaft in special bushes. Adjustment device with rotary pointer, scale and locking device for the volume flow set point, can be adjusted manually or by actuator. Volume flow controller designed as mechanical controller for constant volume flows without any auxiliary power supply. With special control mechanism for a high degree of control accuracy throughout the entire control range. The volume flow set point must be infinitely adjustable throughout the control range. With variable pressures between 50 and 1000 Pa, the volume flow must be kept constant with a deviation of roughly ±5 % to ±10 %. Casing tightness class C as per DIN EN 1751. Certificate as proof of compliance with the hygiene requirements as per VDI 6022-1, VDI 3803-1, DIN 1946-4, DIN EN 16798-3, SWKI VA104-01, SWKI VA105-01, ÖNORM H6020 and ÖNORM H6021. With Environmental Product Declaration as per ISO 14025 and EN 15804.

…….. pcs.
Volume flow: ……… m³/ h
Press uredrop: ……… P a
Maximum sound power level
Flow noise ……… d B(A)
including SRC duct silencer
Radia tednoise ……… d B(A)
Manufacturer: WILDEBOER
Type: VR1
Size: ………
Complete with fixing sdelier:……….
install: ………. ……….
…….. pc. SRC 600 / 900 duct silencer
deliver: ……….
install: ………. ……….

Delete text not printed in bold as required!
You can find this tender text on the website www.ausschreiben.de ▶ ausschreiben.de.
Or you can use the specification text customised for your product selection in the Wildeboer Configurator ▶ Wildeboer Configurator.

Wildeboer makes it easy

8.1 Wildeboer Configurator

Quick, intuitive configuration of Wildeboer products
Easy calculation of operating point data for the configured product

3D display of the product and download in various formats
Download of data sheets, specification texts and version keys
Login area with individual price display option

https://app.wildeboer.de/prdcfg/prodgroups?path=3.20.31

8.2 WiDim dimensioning software

Functional, modern and intuitive dimensioning of Wildeboer products
Conveniently collect operating point data, 3D product views, suitable accessories and current revision documents in a single project
Project can be output in various formats