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VAS

VAS

Product catalog summary

Performance Data
The VAS operates within a temperature range of 10 to 40°C and a differential pressure range of 50 to 1000 Pa. It requires a connection voltage of 24V DC/AC, ±10%, 50/60 Hz, and accepts control signals of 0-10 V DC or 2-10 V DC.

Special Features
The VAS is compact, features a high-performance silencer, and offers high precision and reliable control with low pressure losses. It does not require inflow or outflow distances.

Tests and Standards
The VAS complies with VDI 6022, DIN EN 13779, and DIN EN 1751 standards for hygiene, ventilation, and leakage air, respectively.

Approvals and Certificates
The product meets RoHS 2002/95/EC, EMC 2004/108/EC, Low Voltage 2006/95/EC, and Machinery Directive 2006/42/EC.

Description
The VAS is a sound-damped volumetric flow controller for supply or return air systems, constructed from galvanized steel with thermo-acoustic insulation.

Function
The VAS regulates variable volumetric flows between Vmin and Vmax based on supply air temperature, maintaining constant or variable flow using a pneumatic or electronic controller.

Field of Application
Suitable for supply and return air systems with constant or variable volumetric flows, operating within a differential pressure range of 50 to 1000 Pa.

Advantages
Advantages include compact size, integrated silencer, high precision, low pressure losses, and reduced operating costs. It is compatible with both rectangular and round duct connections.

Construction
The housing is made of galvanized sheet steel with mineral wool lining, and the damper leaves are designed for low pressure loss. The measuring cross is made of aluminum with 12 measuring points.

Model and Product Versions
Models include VAS-K (compact) and VAS-S (extended), with various nominal widths and configurations for supply and return air.

Accessories
Accessories include flat-bed acoustic cladding, heating registers, transition pieces for duct connections, and rubber lip seals for sealed connections.

Technical Data Overview

Volumetric Flow Range: Varies with nominal widths, measured in m3/h and l/s. Minimum and maximum flow velocities are 2 m/s and 12 m/s for electric controllers, and 3 m/s and 12 m/s for pneumatic controllers.
Calibration and Specifications: Controllers are calibrated to a standard curve of 12 m/s. Testing is required for different calibration curves.
Pressure and Density Considerations: An additional 5 Pa is added to the static minimum pressure difference during parameter setting. Air density is considered at 1.2 kg/m³.
Noise Levels: Detailed tables provide noise levels for different configurations and pressure levels, measured in decibels across various frequencies.

Technical Specifications
The VAS is designed for reduced noise levels and includes models like VAS-K-Z-FD1 and VAS-S-Z-FD1. Noise level data is provided for various operational pressures.

Heating Registers
Two-row (-H2) and four-row (-H4) heating registers are detailed with specifications for air volume, pressure loss, and thermal output.

Controller Selection
Compatible controllers include electrical controllers from Belimo and a pneumatic controller from Sauter, with options for other manufacturers.

Circuit Diagrams
Diagrams for standard controllers like NMV-D3-MP and VRD3-SO include connection details and operational modes for VAV and CAV systems.

Technical Data of Controllers
Comprehensive data for each controller type includes power supply requirements, measuring principles, and protection classes.

Pneumatic Controllers
The RLP100-F003 pneumatic controller is suitable for precise control in laboratory environments, with specifications for pressure ranges and response sensitivity.

Damper Actuators
Specifications for damper actuators compatible with VRD3 SO and VRP controllers include supply voltage, torque, and environmental conditions.

Specifications
The VAS operates at a safety extra low voltage (Class III) with a protection degree of IP54. It is maintenance-free and features manual winding with lock for adjustment.

Startup Procedures
Startup can be performed using a PC-Tool or the ZTH EU setting and diagnostic device, which allows for easy parameter setting and diagnostics.

Installation and Handling
Components should be checked for transport damage and stored carefully. Installation requires sufficient space and resources, with maintenance by trained personnel.

Maintenance
The dynamic differential pressure sensor requires minimal maintenance. Pressure hoses should be cleaned if unexpected flow deviations occur.

Order Code
The order code includes specifications for type, model, nominal width, material, and other customizable components.

Specification Text
The VAS controller is suitable for controlling constant or variable volumetric flows and meets the tightness requirements of DIN EN 1751.

Materials and Components

Frame: Galvanised sheet steel
Pipes: Copper
Collector: Steel
Blades: Aluminium

Pipe Configurations

2 rows of pipes (-H2)
4 rows of pipes (-H4)

Coating

DD coating (-DD) for protection against aggressive return air

Transition Pieces

High-pressure side made of galvanised sheet steel
Connection options:
- Round ducts (-USR)
- Rectangular ducts (-USE)

Seals

Rubber lip seal (-GD1) made of special rubber, applicable for USR only

Catalog excerpts

VASSound-damped volumetric flow controller PERFORMANCE DATA TESTS AND STANDARDS • Operating temperature: 10 - 40° C • Difference pressure range 50 - 1000 Pa • Connection voltage for VAS (electronic): 24V DC/AC, ±10%, 50/60 Hz • Control signal: 0-10 V DC or 2-10 V DC • VDI 6022, Sheet 1: Hygienic requirements of ventilation and air-conditioning systems • DIN EN 13779 (2007): Ventilation of non-residential buildings • Leakage air: DIN EN 1751 (2014-06) SPECIAL FEATURES APPROVALS AND CERTIFICATES • RoHS 2002/95/EC • EMC 2004/108/EC • Low voltage 2006/95/EC • Machinery Directive 2006/42/EC • Compact dimensions and low height • Integrated high-performance silencer • High precision, easy mode of operation and reliable control • Low pressure losses • No inflow or outflow distances required. SCHAKO | Ferdinand Schad KG SteigstraRe 25-27 D-78600 Kolbingen

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VAS – Sound-damped volumetric flow controller TECHNICAL DOCUMENTATION Table of Contents Construction subject to change. No return possible.

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VAS – Sound-damped volumetric flow controller TECHNICAL DOCUMENTATION Description | Function | Field of application The sound-damped volumetric flow controller VAS in rectangular design is suitable for use in supply or return air systems for constant and variable volumetric flows at high acoustic requirements. The VAS achieves high control accuracy at any inflow conditions. It can also be used for controlling room or duct pressure. In VAV systems, the integrated volumetric flow controller VAS can regulate variable volumetric flows between Vmin and Vmax as a function of the supply air temperature....

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VAS – Sound-damped volumetric flow controller TECHNICAL DOCUMENTATION Advantages | Construction | Version| Product versions | Accessories OVERVIEW OF PRODUCT VERSIONS Compact dimensions and low height Integrated high-performance silencer High precision, easy mode of operation and reliable control Optimised for systems of low velocities Low pressure losses Significant savings in operating costs during installation For rectangular and round duct connections Low mounting and maintenance expenditure No inflow or outflow distances required. Figure 1: Supply air, left-hand model, top view CONSTRUCTION...

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VAS - Sound-damped volumetric flow controller TECHNICAL DOCUMENTATION Dimensions and weights Detail Y Supply air: Return air: Duct: B = blue R = red Table 1: Weights VAS-K/ VAS-S Construction subject to change. No return possible. Version: 2017-05-08 | Page 5

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VAS – Sound-damped volumetric flow controller TECHNICAL DOCUMENTATION Dimensions of accessories DIMENSIONS OF ACCESSORIES Transition piece (-USR) Connection to round ducts on high-pressure side for supply air or return air (to DIN EN 1506). Rubber lip seal (-GD1, for -USR only) Detail X: Metu flange Figure 6 : Rubber lip seal (-GD1) Figure 7: Connection to round ducts on high-pressure side Table 3: Connection to round ducts on high-pressure side Figure 8: Connection to rectangular ducts NW 1 2 3 4 5 Table 4: Connection to rectangular ducts Construction subject to change. No return possible. Connection...

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VAS - Sound-damped volumetric flow controller TECHNICAL DOCUMENTATION Dimensions of accessories ■CHAK# Flat-bed acoustic cladding (-FD1) Integrated into VAS- / VAS-S housing Tabel 5: Flat-bed acoustic cladding (-FD1) Table 6: Heating register Construction subject to change. No return possible.

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VAS - Sound-damped volumetric flow controller TECHNICAL DOCUMENTATION Technical data Volumetric flow range Table 8: Static minimum pressure difference For correct operation of the controller, please note that an additional 5 Pa must be added to the static minimum pressure difference during parameter setting. Construction subject to change. No return possible.

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VAS - Sound-damped volumetric flow controller TECHNICAL DOCUMENTATION Technical data = value below the static minimum pressure difference Table 9: Flow generated noise VAS-K-Z Construction subject to change. No return possible.

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VAS - Sound-damped volumetric flow controller TECHNICAL DOCUMENTATION Technical data = value below the static minimum pressure difference Table 10: Flow generated noise VAS-K-A Construction subject to change. No return possible.

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VAS - Sound-damped volumetric flow controller TECHNICAL DOCUMENTATION Technical data = value below the static minimum pressure difference Table 11: Flow generated noise VAS-S-Z Construction subject to change. No return possible.

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VAS - Sound-damped volumetric flow controller TECHNICAL DOCUMENTATION Technical data = value below the static minimum pressure difference Table 12: Flow generated noise VAS-S-A Construction subject to change. No return possible.

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VAS - Sound-damped volumetric flow controller TECHNICAL DOCUMENTATION Technical data Table 13: Radiated noise VAS-K-Z / VAS-S-Z / VAS-K-A / VAS-S-A Construction subject to change. No return possible.

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VAS - Sound-damped volumetric flow controller TECHNICAL DOCUMENTATION Technical data Construction subject to change. No return possible.

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VAS - Sound-damped volumetric flow controller TECHNICAL DOCUMENTATION Technical data | Controller selection Heating register (-H2), two-row CONTROLLER SELECTION Table 15: Heating register (-H2) Other controllers available on request. Makes Belimo, Gruner, Sauter, Siemens possible. Table 17: Controller selection Heating register (-H4), four-row Table 16: Heating register (-H4) Construction subject to change. No return possible.

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VAS - Sound-damped volumetric flow controller TECHNICAL DOCUMENTATION Circuit diagrams Circuit diagram standard controller Compact controller NMV-D3-MP (make Belimo) VAV with analogue command signal VAV with lock (CLOSED) MP-Bus activation with integrated MP / actual value sig-■*TaO ...10V/2...10V 1 VAV command signal 0...10V CLOSED / VAV mode Lock mode (CLOSED): In the 2...10 V mode, the following function can be carried out with a 0 -10 V signal: Construction subject to change. No return possible.

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All SCHAKO KG catalogs and technical brochures

Archived catalogs

DISA-B
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DISA-601
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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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