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VRAQ

Product catalog summary

Volumetric Flow Controller VRAQ Overview
The VRAQ volumetric flow controller is designed for pressure-independent regulation in ventilation and air-conditioning systems. It maintains constant or variable volumetric flow based on command variables such as room temperature controllers or bus systems. The controller includes a housing, measuring sensor, control flap, PI controller with pressure sensor, and actuator, forming a closed control loop for energy-efficient air-conditioning.

Specifications and Standards
The VRAQ meets DIN EN 1751 standards for leakage air flow and housing leakage, achieving class 4 and class B respectively at duct pressures up to 1000 Pa. It is also compliant with VDI 6022 and DIN 1946 for hygienic and health requirements in air-conditioning systems.

Installation Guidelines
Proper installation is crucial to avoid errors. Minimum distances from connection pieces, fire dampers, and silencers must be observed. The controller can be installed with horizontal or vertical damper axes. Special care is needed in environments with high humidity or dust contamination, requiring appropriate filters and insulation to prevent condensation.

Construction and Model Variants
The VRAQ is available in various models, including non-sealing and air-tight sealing options, with different materials for housing, damper leaf seals, and bearings. The housing is made of galvanized sheet steel, with options for DD coating for aggressive media. Gear wheels are made of plastic PA6, with stainless steel options for high humidity environments.

Technical Data and Accessories
The controller operates with a control voltage of 24 V AC and is compatible with various command signals. It can be equipped with electric or pneumatic controllers, with options for spring return actuators and high-speed actuators. Acoustic cladding is available for noise reduction.

Maintenance and Service
Regular maintenance is required, with inspection openings provided for easy access. Only suitable cleaning materials should be used for stainless steel components. Compatibility with customer installations must be verified on-site.

Overview: The document provides detailed technical specifications and operational guidelines for various volumetric flow controllers, primarily focusing on the VRAQ model and its associated components. It includes information on electric and pneumatic controllers, connection diagrams, and control functions.

Specifications: The document outlines the specifications for different controllers, including the Belimo VRD3-SO, VRP-VFP, VRP-STP, and Siemens GLB181.1 E/3. Key parameters such as supply voltage, power consumption, torque, and control functions are detailed. The controllers support various operating modes, including VAV (Variable Air Volume) and CAV (Constant Air Volume).

Procedures: Instructions for setting Vmin and Vmax values are provided, emphasizing that Vmax must always be higher than Vmin to avoid CAV mode operation. The document describes the use of potentiometers and the ZTH EU setting device for adjusting these values.

Connection Diagrams: Multiple connection diagrams are included, illustrating the wiring and terminal assignments for different controllers. These diagrams cover both electric and pneumatic controllers, highlighting the importance of correct wiring for optimal performance.

Control Functions: The document explains the control functions for room and duct pressure regulation, including the use of differential pressure sensors and actuators. It describes master/slave and parallel activation setups for supply and return air volumetric flow control.

Technical Data: Detailed technical data for controllers and motors are provided, including measuring principles, sensor ranges, and communication capabilities. The document specifies the use of dynamic pressure sensors and digital VAV controllers for precise control.

Revisions and Updates: The document notes that construction is subject to change and no returns are possible, indicating the importance of staying updated with the latest versions for accurate implementation.

Overview: This document provides detailed technical specifications for various volumetric flow controllers and associated components, primarily focusing on products from Belimo, Gruner, and Siemens. These devices are used for controlling air flow in HVAC systems, utilizing pressure sensors and digital controllers.

Specifications:

Temperature Range: Operating temperatures range from 0°C to +50°C with storage temperatures from -20°C to +80°C. Relative humidity is maintained between 5% to 95% non-condensing.
Sound Power Level: Maximum sound levels range from 35 dB(A) to 45 dB(A) depending on the model.
Supply Voltage: Devices operate on AC 24 V 50/60 Hz or DC 24 V, with functional ranges allowing for slight variations.
Power Consumption: Varies by model, typically between 1.1 W to 5.5 W.
Protection Class and Degree: All devices are classified under Protection Class III (safety extra low voltage) with degrees of protection ranging from IP42 to IP54.

Control Functions:

Devices support VAV (Variable Air Volume), CAV (Constant Air Volume), and Open-Loop control functions.
They can operate in supply/return air configurations, stand-alone, or in master/slave parallel circuits.
Mixing box control is also supported.

Communication and Integration:

Communication is facilitated via PP/MP bus with a maximum of DC 15V and 1200 baud rate.
Integration with DDC controllers and PLCs is possible, with support for LONWORKS®, EIB-Konnex, MODBUS RTU, and BACnet through BELIMO interfaces.
Sensor connections include passive (Pt1000, Ni1000) and active sensors (0-10 V) for temperature, humidity, and presence detection.

Measuring Principles and Ranges:

Pressure measurement is the primary principle, with ranges varying from 0 to 600 Pa depending on the sensor type.
Dynamic and static pressure sensors are used, with automatic zero-point calibration in some models.

Additional Features:

Devices are maintenance-free and feature plug-in operation via service sockets or PC tools.
Some models include a fan optimizer and support for KNX communication.

Overview: The document provides detailed technical specifications and operational guidelines for various volumetric flow controllers and damper drives, primarily used in HVAC systems. It includes information on control functions, power requirements, protection classes, and operational parameters.

Specifications:

Control Function: VAV/CAV, open loop, suitable for supply/return air or stand-alone operation with positive control.
Setting Range: Vmin/Vmax settings range from -20% to 100% of Vnom for Vmin and 20% to 100% for Vmax.
Power Supply: AC 24 V 50/60 Hz or DC 24 V with a functional range of AC 19-29 V and DC 19-29 V.
Protection Class: III (Safety extra low voltage) with a degree of protection IP54.
Temperature Range: Operational temperatures range from 0-50°C with storage temperatures from -25°C to +70°C.
Maintenance: Devices are maintenance-free.

Procedures:

Functional Check: Includes steps for verifying electrical connections and ensuring correct operation of volumetric flow controllers using setting potentiometers and connections.
Startup: Instructions for using PC-Tool and ZTH EU for direct connection and configuration in switch cabinets.

Standards and Recommendations:

Conforms to EN 13463-1 and EN 1127-1 for use in potentially explosive atmospheres of Zone 1.
Recommended to check wiring and transformer power if operational issues arise.

Key Components:

Volumetric Flow Controllers: VRAQ models with specific power consumption, torque, and running time specifications.
Damper Drives: Various models with different torque and running time specifications, suitable for different applications.

Overview: The document provides technical specifications and operational guidelines for the ZTH EU device and volumetric flow controllers, specifically focusing on Belimo products. It includes connection diagrams, device specifications, maintenance instructions, and order details for various components.

Specifications: The ZTH EU device is designed for easy and quick setting of VAV boxes parameters, diagnostic functions, and is compatible with all Belimo VAV controllers with integrated PP communication from 1992. It operates without batteries, using voltage supplied by VAV controllers, and includes a service socket and connecting cable.

Connection Procedures: The document outlines two connection diagrams for local connections using ZK1-GEN and ZK2-GEN cables. It specifies the color coding for connections and details the connection and supply methods for both stand-alone and bus operations.

Device Operation: The ZTH EU features a backlit LCD display, key functions for navigation and input confirmation, and a damper position indicator for diagnostics. It supports functional tests of the MP bus and is backward compatible with all Belimo PP/MP units from 1992.

Maintenance and Service: Instructions are provided for zero adjustment of static pressure sensors and cleaning of dynamic differential pressure sensors. The document emphasizes careful handling and storage of controllers to prevent damage and ensure proper operation.

Order Details: The document includes detailed order codes for volumetric flow controllers and mineral wool silencers, specifying dimensions, materials, and additional features like acoustic cladding and damper positions.

Additional Features: The document mentions the use of the Belimo Assistant App for NFC-capable devices and provides guidelines for commissioning using the setting device GUIV-A.

Specifications:
The document describes a mineral wool baffle silencer, specifically the ZSQ model with MWK-OB baffles, and a volumetric flow controller, VRAQ, designed for rectangular ducts. The silencer is constructed from galvanised sheet steel and features a Metu profile M3. The VRAQ controller is suitable for both supply and return air systems, allowing for constant or variable volumetric flow and pressure regulation. It operates within a pressure difference range of 50-1000 Pa and ambient temperatures from 0 to +50°C. The controller supports duct velocities of 1-12 m/s and can be adjusted post-installation.

Procedures and Standards:
The VRAQ controller is compatible with DIN EN 1505 / DIN 24190 standards for spiral duct connections. It includes a TÜV inspection according to VDI 6022 Sheet 1. The housing and blades are made of galvanised sheet steel, with options for airtight sealing to DIN EN 1751 standards up to class 4. The product also offers various accessories and configurations, such as pneumatic controllers and acoustic cladding, to meet specific requirements.

Recommmendations and Options:
Additional features include opposed blades with different materials and bearings, housing leakage options, and acoustic cladding for noise reduction. The mineral wool silencer is equipped with MWK-OB baffles, which are abrasion-resistant and non-flammable, meeting DIN 4102 A2 standards. The document suggests consulting page 42 for controller selection and highlights the availability of higher requirements upon request.

Key Data:
- Pressure difference range: 50-1000 Pa
- Ambient temperature: 0...+50°C
- Duct velocity: 1-12 m/s
- Control voltage: 24 V AC, 50/60 Hz
- Housing leakage: Class B to DIN EN 1751
- Blade leakage: Up to class 4 to DIN EN 1751
- Acoustic cladding: 40 mm sound-absorbing material
- Silencer baffles: Measured to ISO/DIS 7235 and DIN 45646

Catalog excerpts

SCHAKOVolumetric flow controllerVRAQ Leakage air flow with control damper closed according to DIN EN 1751, up to class 4 Ferdinand Schad KG SteigstraBe 25-27 D-78600 Kolbingen Telephone +49 (0) 74 63 - 980 - 0 Fax +49 (0) 74 63 - 980 - 200 [email protected] schako.com

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08/61 - 2 Construction subject to change. Version: 13.03.2020 No return possible!

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Volumetric flow controller VRAQ Description A volumetric flow controller is used for pressure-independent volumetric flow regulation in ventilation and air-conditioning systems. It is used to keep the volumetric flow constant (CAV) within specified limits or to control it variably (VAV) as a function of a command variable, for example a room temperature controller, DDC or bus system. For constant volumetric flows, the operating stages CLOSED/Vmin/Vmid/Vmax/OPEN are available in stage operation, controlled via relays or switches. The housing, measuring sensor, control flap, PI controller with...

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Volumetric flow controller VRAQ All volumetric flow controllers can be assembled with horizontal or vertical damper axis.

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Volumetric flow controller VRAQ Construction Housing - Galvanised sheet steel (-SV) - Galvanised sheet steel with DD coating inside (-DD) (only available for VRAQ-HKP and VRAQ-HKU) Damper leaf seal - made of PUR, silicone-free - for airtight sealing design to DIN EN 1751 Damper bearing - Brass (VRAQ H=100) - Plastic (VRAQ-HKP and VRAQ-JK-LP) - Sintered (VRAQ-HKU and VRAQ-JK-LU) Blades - Opposed, made of galvanised steel sheet, not air-tight (VRAQ-HKP and VRAQ-HKU) - opposed, made of extruded aluminium profiles, air-tight sealing to DIN 1751. (VRAQ-JK-LP and VRAQ-JK-LU) Measuring cross - Extruded...

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Volumetric flow controller VRAQ Models and dimensions DimensionsLouvre profileVRAQ-HKP / VRAQ-HKU H = 100-180 / W = 140-565 with electric controller VRAQ-...-DS0, without acoustic cladding VRAQ-JK-LP / VRAQ-JK-LU 40 mm thick sound-absorbing material is pressed to 35 mm, with sheet metal casing H = 100-180 / W = 140-565 with pneumatic controller not available Available sizes x = available -- = not available ca. = approx. All combined lengths and heights available. The VRAQ is only delivered in right-hand design. If the left-hand design, with the controller and motor on the left, is required, for...

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with pneumatic controller VRAQ-...-DS0, without acoustic cladding Volumetric flow controller VRAQ H = 201-1003 / W = 201-1003 with electric controller VRAQ-...-DS0, without acoustic cladding VRAQ-...-DS4, with acoustic cladding 40mm VRAQ-...-DS4, with acoustic cladding 40mm 40 mm thick sound-absorbing material is pressed to 35 mm, with sheet metal casing 40 mm thick sound-absorbing material is pressed to 35 mm, with sheet metal casing Available sizes VRAQ-HKU-... / VRAQ-HKP-... x = available -- = not available All combined lengths and heights available. S* = Projection length with a damper leaf...

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Volumetric flow controller VRAQStandard controller selection with electric controller (standard): Construction subject to change.

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Volumetric flow controller VRAQ Damper blade leakage VRAQ, classification according to DIN EN 1751 Construction subject to change.

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Volumetric flow controller VRAQAccessories - dimensions Mineral wool silencer (-ZSQ) with baffles MWK-OB Available sizes and insertion loss for mineral wool silencer (-ZSQ) H“ (mm) 100 140 160 180 201 225 252 318 357 400 449 503 565 634 711 797 894 1003 The possible width and height combinations are listed on page 7. Please note! The parameters KA (number of baffles), K (baffle strength ) and Mineral wool silencer ZSQ must be ordered separately! S (gap width ) depend on the width B. Construction subject to change.

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Volumetric flow controller VRAQ Technical data Information for parameterisation Attention, the following specifications are important for the programming of the volumetric flow controllers: - this table specifies the complete measuring range of the standard controller (volumetric flow range). - If the customer absolutely wants a calibration curve different from 12 m/s, it must be specified! - When the air volume drops below the Vmin shown in the chart, the correct functioning of the volumetric flow controller is no longer guaranteed! - If only one air volume is specified in the order (as Vmax...

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with electric controller (standard) H (mm) - MIN values refer to air velocity of 1 m/s - MAX values refer to air velocity of 12 m/s H=318 for VRAQ-JK-LP / VRAQ-JK-LU not available. -- = not available Construction subject to change.

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Volumetric flow controller VRAQ Acoustic data VRAQ H= 100-180 / W= 140-565 A-weighted sound power level LWA [dB(A)]Flow generated noiseH (mm) 100 140 160 vk (m/s) 12 12 12 140 49 Lwa [dB(A Radiated noise VRAQ-...-DS0 (without acoustic cladding) 08/61 - 13 Construction subject to change.

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Volumetric flow controller VRAQRadiated noise VRAQ-...-DS4 (with acoustic cladding)08/61 - 14 Version: 13.03.2020 Construction subject to change.

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Volumetric flow controller VRAQAcoustic data VRAQ H= 201-1003 / W= 201-1003 Inflow area A (m2) Construction subject to change.

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Volumetric flow controller VRAQ Technical data of the control components Measured value collection and control function The measured value collection is carried out via a flow-favouring double measuring cross. The measuring openings are distributed over the measuring cross according to the median line method. The pressure differential formed on the measuring cross is determined by means of a dynamic or static measuring sensor. The measured values are averaged to give an average value which represents a measuring quantity for the volumetric flow. The controller compares the actual value signal...

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Volumetric flow controller VRAQ MP bus activation with integrated switch Circuit diagrams Circuit diagram electric controller (standard) Compact controller Belimo make: LMV-D3-MP / NMV-D3-MP / SMV-D3-MP VAV with analogue command signal VAV with lock (CLOSED) Mode 2-10 V DC Cable designations Lock mode (CLOSED) In the 2...10 V mode, the following function can be carried out with a 0...10 V signal: Contact closed, function active Contact closed, function active, in mode 2 ...10 V only Contact open * not available for DC 24 V supply Construction subject to change.

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.

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