KCRK Constant air volume regulators

Range of flow rates by size. 6

Description The circular constant flow control damper (with adjustable option) is a control component that functions independently of pressure and without an external power supply. It can be considered "self-regulating” at pressures between 50 and 250 Pa thus maintaining the necessary air volume flow. Consequently, this air volume regulator make costly system balancing unnecessary by ensuring constant air volume. It includes an adjustment device to manually adjust the factory-set air volume flow on site. Applications It can be used either for ventilation or air conditioning in air supply or return...

Adjustment If the factory-calibrated flow must be changed, take the following steps: • The required flow rate must be known before the flow control damper is installed. • Unscrew the flow rate setscrew by 2 turns, using a “Torx No. 9” screwdriver. • Select the numerical position for the flow rate required by setting the screw to the respective number of the scale. • Tighten the flow rate setscrew. Air volume flows other than those listed can be obtained by placing the reference module in an intermediate position.

Series KCRK Mounting • KCRK flow control dampers are designed to be installed inside ducts. • Perfect coupling and tightness are ensured by the built-in seal. • The flow direction shown on the regulator housing must be respected to ensure proper operation. Arrow indicating air flow direction • When the air volume regulator is installed along with a diffusion component, the minimum distance between the diffuser and the flow regulator must be at least one diameter for return and three diameters for supply ducts. • The scale to select the flow control damper must be positioned at the bottom, as...

Sound pressure levels at a differential pressure of 50 Pa The table provides an initial selection by including a range of 5 flow rates from minimum to maximum. Lpa = Sound pressure level in the room expressed as dB(A) due to regenerated sound in the flow control damper, producing duct and room attenuation of 8 dB/octave. Flow rate precision: approx. ± 10% of the nominal flow rate.

Flow rate setpoint values available, by size. A default flow rate is set in the factory. The client can adjust the flow rate settings according to the setpoint position assigned. The attached table lists the flow rates for each setpoint according to size.

Sound power values at duct outlet. The following tables indicate the sound power spectrum, expressed as dB/octave, for each size with different flow rates and static pressures at the regulator intake as the result of regenerated noise. The measurements were completed in a reverberation chamber as per UNE-EN-ISO 3741 and UNE-EN-ISO 5135.

Series KCRK THIS CATALOGUE IS COPYRIGHTED. Partial or full reproduction of its content is strictly prohibited without express written authorization from KOOLAIR, S.A. CEN-KCRK-0316-00

KOOLAIR, S.A. Calle Urano, 26 Poligono industrial nº 2 – La Fuensanta 28936 Móstoles - Madrid - (España) Tel: +34 91 645 00 33 Fax: +34 91 645 69 62 e-mail Koolair: [email protected]