DSRQ - DSRSQ - DSRSQ-THERM

Transcription

1 DSRQ - DSRSQ - DSRSQ-THERM Specification item: Variable geometry diffuser on 597x597 mm panel developed for rooms with high ceilings where a long throw and a high induction ratio are required. Made up of a half-housing in which individually or simultaneously adjustable deflectors are fitted (if required) in order to change the direction of the air jet in relation to the thermal conditions required. SPECIFICATIONS HOUSING MATERIAL: steel DEFLECTOR MATERIAL: steel SURFACE FINISH: epoxy powder coating resistant to impact and abrasion COLOUR: RAL 9010 white. On request, coating in nonstandard RAL colours FASTENING: by means of screws positioned on the diffuser neck INSTALLATION HEIGHT: up to 16 m USE: room cooling and heating TECHNICAL DATA nominal Ø Ø Ø Ø NOISE INDICAZIONI THRESHOLD SOGLIA DI INDICATIONS RUMOROSITÀ Churches, libraries Hospitals Apartments, offices Commercial buildings Rumorosità Noise expressed espressa in in MODELS DSRQ: variable geometry diffuser on square base with manual adjustment. DSRQ-S:variable geometry diffuser on square base with simultaneous adjustment. DSRQ-S VERSIONE THERM: variable geometry thermostatic diffuser equipped with a thermostatic actuator that automatically adjusts the direction of the air flow according to the air output temperature without requiring electrical power. 106

2 Variable geometry diffusers on square panel TSELECTION TABLE FOR (fin inclination 45 ) Model V m/s DIFFUSION SELECTION TABLE FOR AIR-CONDITIONING (fin inclination 67.5 ) Model V m/s Data read with equalizer fitted 107

3 DSRQ - DSRSQ - DSRSQ-THERM SELECTION DIAGRAMS DEFINITION OF THE PARAMETERS USED IN THE DIAGRAM : velocity of the airflow going into the diffuser. Terminal velocity Vf (m/s): air velocity in proximity of the occupied area. Throw depth (m): vertical distance between the diffuser and the point with terminal velocity Vt. Sound power level LWA (): sound power level measured with the filter on the curve A. Air flow rate (): volumetric flow rate of the air coming out of the diffuser. Pressure drops Dp (): Pressure drop of the airflow while it crosses the diffuser due to the energy losses because of friction, sudden changes in direction and cross-section. Variable geometry diffusers in compliance with UNI8728 and EN12238 standards. CALCULATION EXAMPLE Input data - Flow rate P - Temperature difference DT - Room height - Terminal velocity Vt - Diametro diffusore From overall diagram 1 based on the diffuser and on the flow rate, we obtain the input velocity Vo. From diagram 3 relating to the selected diffuser, with velocity Vo and the terminal velocity, we obtain V Vo. From diagram 4 relating to the selected diffuser, based on the throw depth, we obtain the opening angle of the deflectors in isothermal conditions. From diagram 5 relating to the selected diffuser, with the opening angle in isothermal conditions and based on DT, we obtain the necessary opening angle. From overall diagram 2 with the necessary opening angle, we obtain the pressure drop Dp and the sound power level LWA. From overall diagram 1 based on the diffuser and on the flow rate, we obtain the input velocity V0. From diagrams 6 and 7 relating to the selected diffuser, with velocity V0 and based on the height and T, we obtain the inclination of the deflectors. From overall diagram 2 with the necessary opening angle, we obtain the pressure drop p and the sound power level LWA. DISTANCE BETWEEN CENTRES = (Flow rate /12/ room height) 1/2 Diagram 1 Diagram 2 Input velocity V o (ms) Input velocity V o (ms) Flow rate () Pressure drops () 108

4 Variable geometry diffusers on square panel SELECTION DIAGRAMS DSRQ ø 250 Diagram 3 Diagram 6 Diagram 4 Diagram 7 DIFFUSION Diagram 5 Angle of inclination 109

5 DSRQ - DSRSQ - DSRSQ-THERM SELECTION DIAGRAMS DSRQ ø 315 Diagram 3 Diagram 6 Input velocity V o (ms) Angle of inclination in heating ( ) Diagram 4 Diagram 7 Diagram 5 Angle of inclination 110

6 Variable geometry diffusers on square panel SELECTION DIAGRAMS DSRQ ø 400 Diagram 3 Diagram 6 Input velocity V o (ms) Angle of inclination in heating ( ) Diagram 4 Diagram 7 DIFFUSION Diagram 5 Angle of inclination 111

7 DSRQ - DSRSQ - DSRSQ-THERM SELECTION DIAGRAMS DSRQ ø 500 Diagram 3 Diagram 6 Angle of inclination in heating ( ) Diagram 4 Diagram 7 Diagram 5 Angle of inclination 112

8 Variable geometry diffusers on square panel SELECTION DIAGRAMS DSRQ ø 630 Diagram 3 Diagram 6 Input velocity V o (ms) Angle of inclination in heating ( ) Diagram 4 Diagram 7 DIFFUSION Input velocity V o (ms) Diagram 5 Angle of inclination 113

9 DSRQ - DSRSQ - DSRSQ-THERM INSTALLATION DIAGRAM FIG. 1 INSTALLATION ON METAL ELBOW WITH CONNECTING SLEEVE Easy installation, adjustments and maintenance. The internal deflectors are easy to adjust: in the version with manual adjustment of each single component; in the version with simultaneous adjustment by acting on the central adjustment screw. The version with simultaneous adjustment can be motorized. FIG. 2 INSTALLATION ON DUCT WITH CONNECTING SLEEVE FIG. 3 INSTALLATION ON FLEXIBLE HOSE Adjustment Deflector positioned at an angle greater than 45 (closing): optimal position in cooling conditions in order to have the largest horizontal diffusion radius without creating discomfort in the occupied area. Deflector positioned at an angle smaller than 45 (opening): optimal position for particularly high rooms and in heating conditions, as you obtain a vertical downward throw that resists the convective motion of the ambient air. Models DSRQ: variable geometry diffuser on square base with manual adjustment. DSRQ-S: variable geometry diffuser on square base with simultaneous adjustment. Fig. 1 Installation with butterfly damper - Fasten the diffuser neck on the connecting sleeve by means of screws with a distance of at least one diameter. Fasten the sleeve to the metal elbow. - Adjust the deflectors according to the desired diffusion parameters. Fig. 2 Installation on duct with connecting sleeve - Fasten the diffuser neck on the connecting sleeve by means of screws with a distance of at least one diameter. - Fasten the sleeve to the metal duct. - Adjust the deflectors according to the desired diffusion parameters. FIG. 4 INSTALLATION WITH PLENUM Fig. 3 Installation on flexible hose - Hang the diffuser on the ceiling or fasten it on the false ceiling. - Fit the flexible duct on the diffuser neck and fasten it with a hose clamp. - Adjust the deflectors according to the desired diffusion parameters. Fig. 4 Installation with plenum - Fasten the plenum to the ceiling by means of brackets. - Adjust the damper. - Fasten the diffuser to the plenum outlet sleeve by means of screws. - Fit the flexible duct on the plenum inlet sleeve. - Adjust the deflectors according to the desired diffusion parameters. 114

10 DSRSQ-THERM Independent adjustment system by means of a thermostatic actuator positioned on the diffuser neck. As the temperature varies, the actuator adjusts the position of the diffuser blades without requiring electrical power. The adjustment range is between +18 and +35. CLOSED ADJUSTMENT DIFFUSION FINS CLOSED OPEN ADJUSTMENT FINS OPEN 115