Additional operating instructions according to ATEX 2014/34/EU VREX Volumetric flow controller ATEX PERFORMANCE DATA  VDI 6022, Sheet 1: Hygienic requirements of ventilation and air-conditioning systems  DIN EN 13779 (2007): Ventilation of non-residential buildings  Leakage air: EN 1751 (2014-06) Ventilation for buildings Aerodynamic testing of damper and valves*/ Operating temperature: 10 - 50° C Ambient temperature: 0-50°C Measuring range: 0 - 300 Pa Differential pressure range: 50-1000 Pa Volumetric flow range: 53 to 5794 m³/h Command signal: 0-10 V DC or 2-10 V DC regulating the air velocity in the duct in the range of 2...13 m/s  Housing leakage according to DIN EN 1751, class B  Damper leaf leakage according to DIN EN 1751, class 3 APPROVALS AND CERTIFICATES SPECIAL FEATURES     compact dimensions (up to NW 400 mm) position-independent installation possible Low pressure loss For volumetric flow and linear pressure control of rooms or ducts  simple commissioning and setting, without the need of additional setting devices at the controller  with spring return actuator (if required) SCHAKO | Ferdinand Schad KG Steigstraße 25-27 D-78600 Kolbingen  RoHS 2002/95/EC  2014/34/EU ATEX (product directive)  EMC 2004/108/EC

ATEX volumetric flow controller VREX Additional operating instructions according to ATEX 2014/34/EU Table of Contents Construction subject to change No return possible

ATEX volumetric flow controller VREX Additional operating instructions according to ATEX 2014/34/EU Overview of product versions | Function OVERVIEW OF PRODUCT VERSIONS VREX FUNCTION A volumetric flow controller is used for pressure-independent volumetric flow regulation in ventilation and air-conditioning systems. It serves to keep the volumetric flow either constant within specified limits (CAV) or to control it variably (VAV). The housing, measuring sensor, control damper, PID controller with pressure sensor and actuator form a closed control loop with feedback, allowing demand-dependent,...

ATEX volumetric flow controller VREX Additional operating instructions according to ATEX 2014/34/EU Areas of application | Processing AREAS OF APPLICATION • for supply and return air systems • for hazardous areas of zones 1, 2, 21 and 22 • also for explosion group llC in zones 1 and 2 (gases) • Control components with ingress protection IP 66 • for constant CAV or variable VAV installations • for positive control Vmin, Vmid, Vmax, "OPEN" or "CLOSED" • For volumetric flow and linear pressure control • Measuring range: 0...300 Pa • at ambient temperatures 0 °C...20 °C to 50 °C, requirement: measuring...

AVAILABLE SIZES NW 100 - sealing airtight to DIN-EN 1751, class 2 NW 125 - NW 400 sealing airtight to DIN-EN 1751, class 3. Dimensions VREX ATEX volumetric flow controller VREX Additional operating instructions according to ATEX 2014/34/EU Available sizes | Useable volumetric flow ranges ATTENTION: important for parameterisation of the VREX VREX-FD1 The table of "useable volumetric flow ranges" corresponds to the complete measuring range. When the air volume drops below Vmin, the correct functioning of the volumetric flow controller is no longer guaranteed. If only Vmax is specified in the order,...

ATEX volumetric flow controller VREX Additional operating instructions according to ATEX 2014/34/EU Accessories | Accessories - Dimensions ACCESSORIES - DIMENSIONS Metu flange (-MF1/-MF2) / counter flange (-GF) / tension ring (-SR) on both sides  on both sides, duct flange type MF1, galvanised steel  on both sides, duct flange type MF2, stainless steel V2A, 1.4301 Counter flange (-GF) (pair), loose Tension ring (-SR) VREX Metu flange (-MF...) Counter flange (-GF)  on both sides, to Metu flange (must be ordered separately) Tension ring (-SR) (pair), loose Flat flange (-FF1/-FF2), on both sides...

ATEX volumetric flow controller VREX Additional operating instructions according to ATEX 2014/34/EU Available sizes of accessories | Note on packing thicknesses: • L1=500: All packing thicknesses available in all nominal sizes • L1=950: All packing thicknesses available in all nominal sizes • L1=1450: All packing thicknesses available in all nominal sizes. Exceptions: packing thickness of 100 mm is not available for NW100 and NW125. • L1=1950: The following combinations are available: — packing thickness of 50 mm is only available for NW100-125. — packing thickness of 100 mm is only available...

ATEX volumetric flow controller VREX Additional operating instructions according to ATEX Static minimum pressure diff erence^^adiaeTnois^™ RADIATED NOISE STATIC MINIMUM PRESSURE DIFFERENCE NW with insulated connections on both sides 20 mm mineral wool insulation. With a straight supply and return air flow of 3 m each, the VREX acoustic cladding reduces the radiated noise by 8 dB(A).

ATEX volumetric flow controller VREX Additional operating instructions according to ATEX 2014/34/EU Flow generated noise - Pressure loss 125 Pa /250 Pa | Construction subject to change No return possible

ATEX volumetric flow controller VREX Additional operating instructions according to ATEX 2014/34/EU Flow generated noise - Pressure loss 500 Pa/1000 Pa | Construction subject to change No return possible

ATEX volumetric flow controller VREX Additional operating instructions according to ATEX 2014/34/EU Radiated noise - Pressure loss 125 Pa/250 Pa | Construction subject to change No return possible

ATEX volumetric flow controller VREX Additional operating instructions according to ATEX 2014/34/EU Radiated noise - Pressure loss 500 Pa / 1000 Pa | Construction subject to change No return possible

ATEX volumetric flow controller VREX Additional operating instructions according to ATEX 2014/34/EU Flow generated noise -RS-Ex L=950 - Pressure loss 125 Pa/250 Pa | Construction subject to change No return possible

ATEX volumetric flow controller VREX Additional operating instructions according to ATEX 2014/34/EU Flow generated noise -RS-Ex L=950 - Pressure loss 500 Pa/1000 Pa | Construction subject to change No return possible