Optima EXHAUST GRILL AND AIR LOUVER. Perforated Ceiling Diffusers. Features: Standard square sizes:

Transcription

1 Perforated Ceiling Diffusers OPTIMA ceiling diffuser with perforated face, are recoended for heating, ventilating and cooling in centralized air conditioning systems. Perforated face diffusers, with 4-3- or 1 way pattern deflectors are adjustable for horizontal diffusion of air in their respective ways without change in air volume, pressure or sound level. % utilization of diffuser face area, regardless of pattern deflection, gives optimum performance in terms of air handling characteristics. These diffusers have high diffusion induction rates, resulting in rapid temperature and velocity equalization of the mixed air mass, well above the zone of occupancy. Features: Efficient, draftless air distribution for all types of ceilings. Air pattern controllers do not damper the air in any way. Flow rate and sound level remain constant regardless of air pattern required. Air pattern controllers can be replaced to any desired pattern. Perforated surface plate completely conceals pattern controllers. Always available in powder coated finish in any color to match with the false ceiling grid. For supply diffusers, perforated face is dropped slightly below the ceiling. Concealed fixing and easily removable perforated face, give easy access to air pattern deflectors and control damper. Suitable for installation into tiled ceilings. Spigot air inlets are available in a variety of sizes, suitable for flexible duct connections. Standard square sizes: L 0 0 W 0 0 N = = L x W A = Neck size B = Overall face size = Frame width = /5/ widths available F w

2 Perforated Ceiling Diffusers W OPTIMA model OPD-1 is a supply perforated ceiling diffuser having directional ceiling diffuser complete pattern deflectors with 4-3- or way horizontal air diffusion. (5) The spigot damper, provided at the neck of the plenum of the diffuser, is optional. (4) d h (6) () (3) Perforated face plate Air pattern Round neck Spigot damper Plenum box Acoustic liner Border frame F w A B (1) (7) W OPTIMA model OPD- is a supply perforated ceiling diffuser having a baffle plate which diffuses the air vertically downwards for applications requiring localized spot cooling or heating. h d The spigot damper, provided at the neck of the plenum of the diffuser is optional. F w A B

3 Constructional Details and Dimensions Standard sizes and dimensions for angular and straight box plenums N A B h d h 1 0 x x x x NOTE: h height of the angular plenums /straight box plenums height of the return perforated diffuser plenums h 1 Perforated Diffusers Engineering and Performance Data The tabulated performance data includes Area factor, Throw pattern, Discharge velocity and Sound power level. Air volume q : v Throw T : Discharge Velocity V : k NC values : Outlet size : 3 Air volumes are given in mt /h The throw values given in the tables are related to the perforated diffuser placed nearer to the ceiling. Two throw values are given for each qv to the corresponding terminal velocities V t. Minimum Throw 0. m/sec. V t Maximum Throw 0.5 m/sec. V t The effective discharge velocities given are related to the corresponding effective free area A. k Noise data is given in terms of NC levels. These have been derived from sound -1 power level data (db re 10 watts) by subtracting 10 db (Room effect) from the sound power levels. Outlet sizes are mentioned on the left side of each row within a tolerance of + 10%

4 Engineering and Performance Data Selection table for Perforated Ceiling Diffusers N. Size V m/s k x m /h N.C < < > > > 0 x m /h N.C < > > x m /h N.C < > > x m /h N.C < > > Throw Data: Correction Table for other directions of discharging cores 4 way 3 way way 1 way x 1 x 1.05 x 1.10 x 1.15 Induction and Temperature co-efficient V t x = 0.8 t x o V o Temp. co-efficient = t x t o Induction I = V x V o V max. x o t x C

5 0 700 Engineering and Performance Data Easy selection graphs for Perforated Ceiling Diffusers 4 Way, 3 Way, Way and 1 Way V k N.C N.C (1) () (3) Total Pressure Drop P () t (1) () (3) 1 Way Way 3 Way & 4 Way N = Air volume 3 V = mt. /hr.

6 Supply, Return, Extract Ceiling Diffusers Duct fixing and Core Removal: I n s e r t i o n o f d i f f u s e r c o r e i s effected by depressing core pin springs in holes located at end of border frame and releasing core w h e n p i n s a r e a l i g n e d w i t h corresponding holes at opposite end of frame. Procedure is reversed for removal of core. Operation of Opposed Blade Damper: Blade arrangement ensures uniform distribution through diffuser throat. Provides positive control air volume from full open to full closed position, regardless of system pressure. T h e f u l l o p e n t o f u l l c l o s e d position of damper to any degree can be operated by a screw driver after removing the internal core, which is shown in the figure. GENERAL NOTES: The directional segments of each core style are noted as shown to identify with the tabulated performance data. Dimensions noted on each core style are the increments in of the available duct sizes (L x W). For non-standard core style, or a standard core style with modified air volume requirements, see the detailed selection procedure and by simple inter and extra-polation of the given data will be obtained.

7 Product Model Description Supply Round Diffusers ORD-1 Supply Round Diffusers are diffusers with butterfly damper, can be used for supply air. They are suitable for installation in ceilings. The circular design guarantees a uniform radial discharge in supply air application. Diffuser with Damper Return Round Diffusers ORD- Return Round Diffusers, are diffusers without damper. They can be used for Extract air, Suitable for installation in ceiling. Diffuser without Damper

8 Standard sizes A H C B S.No. NECK SIZE A OUTER SIZE B FLANGE WIDTH C Inch Inch DIFFUSER HEIGHT H

9 Accessory Volume Control Damper (Butterfly Type) : Volume Control Damper is an adjustable device used to control the volume of air passing through an air outlet or inlet and mounting in Diffuser neck. Adjustable through diffuser neck. Butterfly Damper A D Available Sizes : Minimum Maximum 5.3 (134 ) Dia. 4.6 (65 )

10 Performance Data Neck Dia. & (Inch) Neck Area m Area Factor Neck Velocity m/s Velocity Pr (5.3) Air flow rate L/s Total pr. Drop NC (db) <15 < (7.5) Air flow rate L/s Total pr. Drop NC (db) < (9.7) Air flow rate L/s Total pr. Drop NC (db) < (11.9) Air flow rate L/s Total pr. Drop NC (db) < (14.3) Air flow rate 151 L/s Total pr. Drop NC (db) <

11 Performance Data cont d. Neck Dia. & (Inch) Neck Area m Area Factor Neck Velocity m/s Velocity Pr (16.4) Air flow rate L/s Total pr. Drop NC (db) < (18.5) Air flow rate L/s Total pr. Drop NC (db) < (.5) Air flow rate L/s Total pr. Drop NC (db) (.6) Air flow rate L/s Total pr. Drop NC (db) (4.6) Air flow rate L/s Total pr. Drop NC (db) Note : Throw date is based on terminal velocity of 0.76 m/s and 0.5 m/s. Sound date - NC(Nois Criteria) Values are based upon a room absorption of 10 db, re 10-1 watts.

12 Installation Details: The attractively shaped Supply/Return diffuser can be installed by means of a fixing clamp and central screw as shown below. Duct Duct Fixing Clamp Installation With Duct Fixing Clamp Ordering Data: Specify 1. OPTIMA type and model. Neck Size A - o 3. Quantity 4. Surface Finish 5. Remarks Example ORD-1 nos. Powder Coated RAL -

13 Exhaust Valves OPTIMA exhaust valves blend readily with contemporary room designs and snapped into the concealed T-bars. The TEV types present a surface flush with the surrounding ceiling tiles. Because of the internal contours of the annular slot, formed by the outer cone and the central disc, the exhaust air pattern is uniformly circular. There is a strong coanda effect for excellent variable air volume performance. Features: The internal contours of the annular slot formed by the outer cone and the central disc, gives a circular uniform exhaust in pattern. A mounting ring made of galvanized sheet steel is supplied for quick and easy concealed installation from below the ceiling line. The outer body is fitted with a foam gasket to form an air-tight seal with the mounting ring. Always available with powder coated color finish to match with the false ceiling grid or tile. Standard models and sizes: Type Model Neck size OEV Material construction: The mounting ring is made of galvanized sheet steel. The outer body and the central disc of the valve are made of heavy gauge aluminum in powder coated colour finish.

14 Exhaust Valves F w h OEV-1 OPTIMA model OEV-1 is an adjustable exhaust air valve provided with a galvanized mounting ring. The adjustment of the central disc from close to full open position can be made by the simple unscrew hod. C D B Standard sizes and their dimensions - Model TEV E : N A B D h Engineering and Performance Date (N) Air flow 1 3 q v (m /h) Position of C in c

15 Exhaust Valves OEV- F d OPTIMA model OEV- is on adjustable exhaust air valve. In this case the outer bogy itself acts as a mounting ring. The adjustment of the central disc can be made by the simple unscrew hod. C D B Standard sizes and their dimensions N A B D h Engineering and Performance Date (N) Air flow 1 3 q v (m /h) Position of C in

16 Exhaust Valves Fixing Details Fixing Details: Type C fixing: Concealed type fixing with a mounting ring Recoended for ceiling and sill applications. NOTE: Standard supply is Type C fixing. Available finishes: Powder coated color finish. (Mention RAL color number) Ordering Data: Specify 1. OPTIMA type and mode. - N 3. Quantity 4. Type of fixing 5. Surface finish 6. Remarks

17 Transfer (or) Door Grilles OPTIMA transfer grilles or door grilles offer the largest free area possible with a completely sight-proof core design. They are widely used, not only in doors and partitions, but also in place of conventional exhaust and return grilles where it is important that the interior of the plenum or duct be concealed. The inverted-vee louver cross section not only blocks vision, but also provides stiffness. Being mounted in the lower portion of a door, a door grille is by nature subjected to knocks and bumps. Here again, durability assures good looks after long service. Attractive durable finishes are available in a variety of colors to harmonize with the door. Features: Constructed out of extruded aluminum sections, comprising a front section with inverted V horizontal blades, borders countersunk for screw fixing. The grilles are made to withstand the heavy use, to which door grilles are subjected. Any combination of the listed sizes can be supplied. For performance date and fixing details see other pages. Available in natural anodized, and bronze anodized aluminum finish. Other colors are optional in powder coated finish.

18 TRANSFER GRILLES AIR DIFFUSION PRODUCTS Transfer (or) Door Grilles Fw ODG-1 OPTIMA model ODG-1 is a non vision type door grille or transfer grille with a fixed frame on one side only. A N 'V' B P B F d B' N F w 'V' B P B ODG- OPTIMA model ODG- is a non vision type door grille or transfer grille with a fixed frame on one side and a sliding frame on the other side. Standard sizes: Any combination of L x W L W ODG-1 N = A = B = F W F d = = 'V' B p = 'V' B = w 'V' B = n ODG- = L x W Neck size = (L - 5) x (W - 5) = x x y Overall size of the grille = 9x = 60) x (y +60) Frame width = Frame depth = Pitch of 'V' blade = 15 / 13 Width of 'V' blade = 8 Height of 'V' blade = N A B B = = = = = L x W Neck size = (L - 5) x (W - 5) = x x y Overall size of the rear side of DGT- = (x + 60) x (y + 60) Overall size of the face side of DGT- = (x + 56) x (y + 56) NOTE: In increments of are also available 18

19 Transfer (or) Door Grilles The figure shows mounting of ODG-1 on a wall. Non vision type transfer grille with fixed frame on one side only. The figure shows mounting of ODG- on a door or wood of thickness. Non vision type door grille with a fixed frame on one side and a sliding frame on the other side. Engineering and Performance Date Transfer Grilles The tabulated performance date includes Volume of air, Area factor and Discharge velocity. Air volume q : v Discharge velocity Vk : Outlet size : Effective Pressure Area A : k 3 Air volumes are given in mt /sec. The effective discharge velocities given are related to the corresponding air volumes q v and effective free area Ak Outlet sizes, given on the left side of each row in a separate table, within a tolerance of + 10%, are related to the corresponding effective pressure areas Ak in mt.

20 Engineering and Performance Data V m/s A k Selection tables for Area Factor Ak Effective free area A in k Ak Ak Ak Ak Ak 1 x x x x x

21 Engineering and Performance Data Selection tables for Area Factor Ak Effective free area A k in Ak Ak Ak Ak Ak 3 x x x x x Type 's' fixing: Type 'C' fixing: For DGT-1: A counter-sunk screw type fixing Concealed type fixing with spring clip Recoended for sidewall or door applications. Recoended for sidewall and door applications. NOTE Standard supply is Type 'S' fixing. Transfer (or) Door Grilles Available finishes: Natural anodized aluminum Powder coated color finish. (Mention RAL color number) Golden anodized aluminum Bronze anodized aluminum Ordering Data: Specify 1. OPTIMA type and model. - L x W Quantity Type of fixing Surface finish Remarks Example: ODG-1 x 0 5 nos. Type 'S' fixing Powder coated finish RAL