08/23 - 2 Construction subject to change. Version: 09.05.2019 No return possible!

Volumetric flow controller VAQS® Description ® The VAQS 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. - high controlling precision Due to its high controlling precision, the controller requires a straight flow section of only 1 x D even after bends. - Blades sealing airtight to DIN EN 1751, Class 3 - Housing leakage air flow...

Volumetric flow controller VAQS® 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...

Models and dimensions Dimensions VAQS® ...-DS0 Volumetric flow controller VAQS® Construction Housing - Galvanised sheet steel - Galvanized sheet steel with DD coating Blades - opposed, made of extruded aluminium profile Blade seal - made of PUR, silicone-free - for airtight design to DIN 1751, Class 3 Blade support - plastic Measuring rods - Aluminium Model VAQS® - Rectangular design, for duct connection to DIN EN 1505, for rectangular model, with blade seal. (air-tight to DIN EN 1751, Class 3) - Housing leakage air flow to DIN EN 1751, class B - with electric controller LMV/NMV-D3-MF, not MP-bus-capable...

Volumetric flow controller VAQS® Available sizes and insertion loss for mineral wool silencer (-ZSQ) B (mm) The parameters KA (number of baffles), K (baffle strength ) and S (gap width ) depend on the width B. Construction subject to change.

Volumetric flow controller VAQS® Technical data Inflow area A (m2) H (mm) Flow generated noise (A = 1 m2) Construction subject to change.

Volumetric flow controller VAQS® Volumetric flow range for VAQS® When the air volume drops below the Vmin shown in the chart, the correct functioning of the volumetric flow controller is no longer guaranteed! Volumetric flow range - 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...

Volumetric flow controller VAQS® Technical data for Belimo components Operating control 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...

Volumetric flow controller VAQS®Circuit diagrams Compact controller Belimo make LMV/NMV-D3-MF - Attention: not MP-bus-capable VAV with analogue command signal VAV with lock (CLOSED)Mode 2-10V DC - + DC 24 V -1 VAV command signal 0...10V/2...10V MP / actual value signal 0...10V / 2...10V on site Switchover CLOSED / VAV operation _MP / actual value signal 0...10V / 2...10V on site Lock mode (CLOSED) In the 2 - 10 V mode, the following function can be carried out with a 0 - 10 V signal: Note: Please ensure mutual locking Function Damper CLOSED Vmin...Vmax CAV - Vmin Damper OPEN CAV - Vmax Contact...

Volumetric flow controller VAQS® LED table of functions for LMV/NMV-D3-MF Application N1 operation Function Status display Description / action - 24V power supply o.k. - VAV-Compact ready for operation Adaptation Address S1 service function Synchronisation Synchronisation started by: a) Operating / service unit b) Manual trigger device at the VAV-Compact c) Power ON behaviour S2 service function Adaptation Adaptation started by: a) Operating / service unit b) Key on the VAV-Compact a) Press both keys «Adaptation» & «Address» simultaneously b) VAV service will be activated: - until 24V supply...

Volumetric flow controller VAQS® Setting the operating potentiometers / calculation formulae Actual value measurement via feedback signal U5 using a voltmeter or PC-Tool LMV/NMV-D3-MF Set value for Vmax V max = --------------- × 100% EW V max V nenn 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...

Volumetric flow controller VAQS®Technical data of the controller Functional control LMV/NMV-D3-MF (make Belimo) Dynamic pressure sensor, digital VAV controller and damper drive VAV-Compact solution Measuring principle : Pressure reading with volumetric flow Measuring range of the 2... ~ 450 Pa sensor : Supply voltage : Functional range : Power consumption: Dimensioning : Torque : Control function : Setting range Vmin/Vmax : AC 24 V 50/60 Hz; DC 24 V AC 19.2...28.8 V; DC 21.6...28.8V 2 W / 3W 3.5 VA / 5 VA min. 5 Nm/10 Nm at the rated voltage VAV/CAV/Open-Loop; Supply/return air or stand-alone...