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VARS
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08/14 - 2 Construction subject to change. Version: 09.05.2019 No return possible!

Volumetric flow controller VARS® Description ® The VARS volumetric flow controller impresses with its simple design, high measuring precision and short length, meeting the majority of customary requirements of volumetric flow controllers. - simple design in accordance with the nominal size of the air duct. This simple design saves a lot of time and provides planning safety. - its short length reduces problems of space. Its short length and its position-independent mounting allow the VARS® volumetric flow controller also to be mounted in situations where little space is available. - high...

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Field of application - for supply and return air systems - for constant or variable volumetric flows - Positive control Vmin, Vmax, "OPEN" or “CLOSED” - Suitable for constant and variable volumetric flow or duct pressure control - differential pressure range from 20 to 1000 Pa - for duct velocities of 1 - 12 m/s - for ambient temperatures of 0 - 50°C When installing volumetric flow controllers, for example in roof central units, in extreme cases, condensation can build up in the measuring pipes of the volumetric flow controller as a result of the large temperature differences between the...

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Volumetric flow controller VARS® Construction Please note! Housing Tension rings, counter flanges and duct silencers must be or- Galvanised sheet steel dered separately and are supplied loose! - Galvanized sheet steel with DD coating - Stainless steel 1.4301 (V2A) or 1.4571 (V4A) Damper - Galvanised sheet steel Damper leaf seal - made of PUR, silicone-free - for airtight design to DIN 1751 Damper bearing - Brass Measuring rods - Extruded aluminium profile (also for stainless steel design, but with DD coating) Model VARS® - Round model, for spiral duct connection to DIN EN 1506, with damper...

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Models and dimensions Dimensions VARS® Metu flange (-MF1/-MF2) / counter flange (-GF) (pair, loose), on both sides, loose/ tension ring (-SR) (pair), on both sides, loose Flat-bed acoustic cladding (-FD1, insulation 3mm) Please note! Tension rings and counter flanges must be ordered separately and are supplied loose! Rubber lip seal (-GD1) Detail X Available sizes VARS® / ..-FD1 / ...-DS2 Construction subject to change.

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Duct silencer (-RS) Available sizes duct silencer (-RS) NW Insertion loss Duct silencer (-RS) Construction subject to change.

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Technical dataVolumetric flow range Static minimum pressure difference NW - If only one air volume is specified in the order (as Vmax value), the volumetric flow controller will be delivered as variable volumetric flow controller. The Vmin value will be set to the value specified in the catalogue. - If only one air volume is specified in the order (as Vmin or Vkonstant value or without value specification), then the volumetric flow controller will be delivered as a constant volumetric flow controller. The volume specified in the order is set to the Vmin value, and the Vmax value is set to...

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Flow generated noise Pressure loss 125 Pa and 250 Pa Construction subject to change.

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Volumetric flow controller VARS® Flow generated noise Pressure loss 500 Pa and 1000 Pa NW Version: 09.05.2019 No return possible! Construction subject to change.

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Radiated noise Pressure loss 125 Pa and 250 Pa Version: 09.05.2019 Construction subject to change. No return possible!

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Volumetric flow controller VARS® Radiated noise Pressure loss 500 Pa and 1000 Pa NW Construction subject to change.

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Volumetric flow controller VARS® 08/14 - 13 Construction subject to change. Flow generated noise with duct silencer L= 950 Version: 09.05.2019 No return possible!

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Volumetric flow controller VARSFlow generated noise with duct silencer L= 950 Pressure loss 500 Pa and 1000 Pa Construction subject to change.

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Construction subject to change.

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Volumetric flow controller VARS® 08/14 - 16 Construction subject to change. Flow generated noise with duct silencer L= 1450 Version: 09.05.2019 No return possible!

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Volumetric flow controller VARS® Technical data for Belimo components Measured value collection and control function The measured values are collected by two measuring rods favourable to the flow. The measuring openings are distributed over the measuring rods according to the median line method. The pressure differential formed on the measuring rods is determined by means of a dynamic or static measuring sensor. From these measuring results the middle value is formed, which gives a measured variable for the volume flow. The controller compares the actual value signal with the set point and...

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Volumetric flow controller VARS® CAV operation / positive contacts Circuit diagrams Compact controller Belimo make LMV-D3-MF - Attention: not MP-bus-capable VAV with analogue command signal VAV with lock (CLOSED) Mode 2-10V DC actual value signal "0...10V / 2...10V Switchover CLOSED / VAV operation actual value signal Note: Please ensure mutual lockingof the contacts! Cable designations Mode setting Signal Lock mode (CLOSED) In the 2 - 10 V mode, the following function can be carried out with a 0 - 10 V signal: **Attention: Controller/DDC must be able to pull the command signal to 0 V....

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Volumetric flow controller VARSLED table of functions for LMV-D3-MF Application Adaptation Address power status green LED (power) is lit | | yellow LED (status) is lit Construction subject to change.

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Volumetric flow controller VARS® Setting the operating potentiometers / calculation formulae Actual value measurement via feedback signal U5 using a voltmeter or PC-Tool The required volumetric flow that is to flow at the 10 V DC command signal at terminal 3 (Y) or with positive control Vmax is set in % at the Vmax potentiometer of the controller, the ZTH-EU or PC-Tool. This value refers to the set Vnenn nominal volumetric flow. Set value for Vmin EW V Supply voltage: 24 V AC/DC (Terminals 1+2) Measurement output 2 - 10 V DC (Terminals 1+5) Measurement output 0 - 10 V DC (Terminals 1+5) The...

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