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LVC
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Type LVC Compact controller Easy controller For low airflow velocities and low duct pressures Nozzle for differential pressure measurement Circular VAV terminal units for supply air and extract air systems with variable volume flows, low airflow velocities and low duct pressures New measurement principle, optimised for airflow velocities from 0.6 to 6 m/s High control accuracy even in case of unfavourable upstream conditions Electronic control components for different applications (Easy, Compact) Easy handling due to innovative control technique Casing length of only 310 mm for all nominal sizes Closed blade air leakage to EN 1751, up to class 2 For all upstream conditions Casing air leakage to EN 1751, class C Optional equipment and accessories Secondary silencer Type CA, CS or CF for the reduction of air-regenerated noise Hot water heat exchanger Type WL and electric air heater Type EL for reheating the airflow

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Type Page Basic information and nomenclature 1.5 - 1 The Easy principle Select nominal size Green light: Ready!

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General information Description VAV terminal unit Type LVC For detailed information on control components see Chapter K5 – 1.3. Application – Circular VAV terminal units of Type LVC for the precise supply air or extract air flow control in variable air volume systems with low airflow velocities. – Closed-loop volume flow control using an external power supply – For low airflow velocities and low duct pressures – Effective pressure (differential pressure) as the result of two measurements, one upstream and one downstream of the damper blade – The relation between damper blade position and...

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General information Technical data Nominal sizes Volume flow rate range Volume flow rate range Volume flow rate control range approx. 10 – 100 % of the nominal volume flow rate Minimum differential pressure Maximum acceptable differential pressure Operating temperature Functional description A new measurement principle makes it possible to measure low volume flow rates. The pressure is measured by means of a nozzle with tappings before (upstream) and after (downstream) the damper blade. The Easy controller or the Compact controller of the LVC determines the resulting differential pressure...

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Order code Order code [3] Attachment (control component) Easy Easy controller [5] Signal voltage range For the actual and setpoint value signals [6] Volume flow rates [m3/h or l/s] Vmin-Vmax for factory setting Attachment Easy controller Attachment Compact controller Operating mode Single Signal voltage range 2 - 10 V DC

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Aerodynamic data The minimum differential pressure of VAV terminal units is an important factor in designing the ductwork and in rating the fan including speed control. Sufficient duct pressure must be ensured for all operating conditions and for all control units. The measurement points for the speed control must be selected accordingly. Volume flow rate ranges and minimum differential pressure values Nominal size ① LVC ② LVC with secondary silencer CS/CF, insulation thickness 50 mm, length 500 mm ③ LVC with secondary silencer CS/CF, insulation thickness 50 mm, length 1000 mm ④ LVC with...

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Quick sizing Air-regenerated noise Quick sizing tables provide a good overview of the room sound pressure levels that can be expected. Approximate intermediate values can be interpolated. Precise intermediate values and spectral data can be calculated with our Easy Product Finder design programme. Quick sizing: Sound pressure level at differential pressure 50 Pa Air-regenerated noise Nominal size 160 The first selection criteria for the nominal size are the actual volume flow rates min and max. The quick sizing tables are based on normally accepted attenuation levels. If the sound pressure...

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Dimensions and weight Dimensional drawing of LVC 310 ~ 300 ① Keep clear to provide access to attachments Dimensions [mm] and weight [kg] Nominal size

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Specification text Standard text This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme. Circular VAV terminal units for variable air volume systems with low airflow velocities, suitable for supply or extract air, available in four nominal sizes. Measurement and control of low volume flow rates based on a new measurement principle. Plastic nozzle with damper blade for measuring the differential pressure upstream and downstream of the damper blade (effective pressure). The relation between...

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