A4 Grilles - Eggcrate.qxd - Scottaire

GRILLES-Eggcrate
EGGCRATE
GRILLES
Grilles with a 12.5mm cell Eggcrate core and
a flanged or channel frame border providing
a high free area. Ideal for sidewall or ceiling return air.
STANDARD •
Code 0103. Eggcrate grille flanged (Fixed core).
Code 0134. Eggcrate grille flanged (Removable core).
Code 0136. Circular Eggcrate grille flanged (Fixed core).
Code 0137. Eggcrate grille with removable core and filter box.
Code 0131. Eggcrate core with flanged border to fit a `T´
bar ceiling system. Tile replacer. (Fixed core).
Code 0133. Eggcrate core with channel frame to fit a `T´
bar ceiling system. Tile replacer. (Fixed core).
Code 0203. Eggcrate core with bevelled edge border to fit a
clip or tegular type ceiling. Specify the make of ceiling.
Tile replacer. (Fixed core).
Code 0206. Eggcrate core with square edged border to fit a
clip or tegular type ceiling. Specify the make of ceiling.
Tile replacer. (Fixed core)
STANDARD SPECIFICATION
STANDARD SPECIFICATION
SIZES
Code 0103,0134 & 0137. 50mm increments in nominal
size from 100mm to 1200m on length or height.
Code 0136. 50mm increments in nominal size from
100mm to 600mm diameter.
Codes 0131, 0133, 0203 & 0206. See table below.
Tile Replacement Eggcrate Standard Sizes
Code Nominal Size Overall Size Code Nominal Size Overall Size
0131
250 x 250
550 x 250
550 x 550
550 x 1150
295 x 295
595 x 295
595 x 595
595 x 1195
0133
250 x 250
250 x 250
550 x 550
550 x 1150
Code Nominal Size Overall Size Code Nominal Size Overall Size
0203
255 x 255
255 x 555
555 x 555
555 x 1155
300 x 300
300 x 600
600 x 600
600 x 1200
0206
255 x 255
255 x 555
555 x 555
555 x 1155
CONSTRUCTION
Aluminium with mechanical joints to lock the mitred
corners.
FINISH
All Codes except Code 0136. Mill finish core with
silver satin anodised border to BS1615 AA5.
Code 0136. Mill finish core and border. We would
recommend a paint finish.
PACKAGING
Each grille is shrink wrapped in polythene with
additional cardboard support to the faces.
295 x 295
295 x 295
595 x 595
595 x 1195
300 x 300
300 x 600
600 x 600
600 x 1200
FIXINGS
Code 0103, 0134, 0136, 0137. Countersunk screw
holes in the border. Size no. 6x1 1 /2˝ self tapping screws
G12
provided with each grille and painted the same
colour as the grille. (Fixing type 0F1).
See Fixing Methods section for screw fixing centres.
Code 0131 & 0133. Lay in to `T´ bar system.
Un-punched borders. (Fixing type 0F2).
Code 0203. & 0206. Require the addition of
appropriate clips to lock into the system.
Un-punched borders. See optional alternatives /
additions page 13. (Fixing type 0F4 & 0F5).
TECHNICAL INFORMATION
See pages 6
13
9.5
2.5
D + 45mm
24
64.5
D = Nominal Duct size
Model shown is Code 0103 + 0106
Square edge border Eggcrate Grille with Opposed Blade Damper
D

GRILLES-Eggcrate
OPTIONAL ALTERNATIVES/ADDITIONS
PAN ADAPTORS & PLENUM BOXES
SIZES
Non-standard sizes. Codes 0103, 0134, 0136 & 0137.
We can manufacture almost any size up to1200mm
square. Please contact Head Office for details. The
product codes become 9103, 9134, 9136 & 9137
respectively.
DAMPER
Opposed blade damper. A clip on opposed blade
damper (code 0106) in mill finish aluminium can be
fitted to all eggcrates except codes 0133, 0136 and 0137.
A circular flap damper (code 0531) can be fitted to
code 0136. Non-incremental sises Code becomes 9106.
FIXINGS
Concealed fixings / sub-frames suitable for Codes
0103, 0134, 0136, 0137. (Fixing type OF3.) See
Fixing Methods section for details. Codes 0203 and 0206.
Clips (Code 0430) are available for locating the grille
in a clip type ceiling system (Fixing type 0F4) or Clips
(Code 0432) for a tegular type ceiling system (Fixing
type 0F5). These clips will fit ceiling systems such as
Burgess, Armstrong, CAPL or others. Please specify
the type and make of ceiling. See page 15 For details.
Un-punched borders on codes 0103, 0134, 0136 and
0137. Codes have a prefix 9 instead of 0.
(Fixing type OF2.)
FINISHES
Any BS, RAL or NCS colour. Code 0145. Please
specify colour reference. We suggest powder coating
on top of anodising for swimming pool applications.
(Un-insulated)
Top entry pan adaptor without flange (120mm high). Code 0323.
Top entry pan adaptor without flange (17mm high). Code 0338.
This height of pan should only be used where the spigot diameter
plus 50 is equal to or more than the smallest nominal dimension of
the pan.
Top entry pan adaptor with flange (120mm high). Code 0328.
Side entry plenum box without flange. Code 0335.
Side entry plenum box with flange. Code 0324.
Details are shown below.
Pan adaptors and plenum boxes can be fitted with quadrant
dampers in the spigot for either manual (Code 0483) or cord
operated control. (Code 0484)
We can also design boxes with non-standard heights where there is
limited space above a ceiling or in the cavity.
Please contact our technical staff at Head Office.
ORDERING DETAILS
• The code for the grille should always have 13 digits.
See page 1.
• Please always give length first, then height unless circular.
If circular the nominal diameter should be the last 4 digits
with zero’s for the length.
• Add codes for additions / alternatives as suffixes.
EXAMPLE:
A standard flanged eggcrate grille for sidewall mounting,
nominal size 300mm x 200mm, with an opposed blade
damper and painted RAL 9010 satin would be coded:-
0103/00300/0200+0106+0145-RAL 9010 satin + OF1
Applications. Extract * Sidewall * Ceiling * Transfer *
SAFETY WIRES
Available for removeable core grilles. They link the
core to the frame, until released, in order to minimise
accidents. Minimum 2 per grille. Code 0379.
G13

GRILLES-Eggcrate
D
D - 41mm Inside
2.5
4.5
49.5
91.5
D - 10mm
D + 45mm
13
D = Nominal Duct size
Model shown is Code 0134 + 0106
Removable Core Eggcrate Grille with Opposed Blade Damper
D
D - 44.5mm Inside
2.5
Max 40mm
52.5
4.5
D - 10mm
13
D + 45mm
D = Nominal Duct size
Model shown is Code 0137
Removable Core Eggcrate Grille with Filter Frame (no dampers available)
Suitable for any box filter material up to 40mm thick. If the material is flexible,
a wire mesh screen is added to support the back of the filter. (Code 0410)
T Bar Ceiling System Centres
15.6
NRLW
Ceiling System Centres - 5mm
Model shown is Code 0133
Eggcrate Core with Channel Frame to fit a ‘T’ Bar Ceiling System
(NO DAMPERS ON THIS MODEL)
T Bar Ceiling System Centres
69
24
Ceiling System Centres - 5mm
Model shown is Code 0131 + 0106
Eggcrate Core with flanged border to fit a ‘T’ Bar Ceiling System
G14

GRILLES-Eggcrate
Nominal = Tile - 45mm
A
69
27.7 C
B
Clip Fixing System
dimensions C
must be specified
Tile Size
33.2
Tegular Fixing System
dimensions A & B
must be specified
Model shown is Code 0206 + 0106
Square edge border Eggcrate Grille with overall size to suit clip or
tegular type Ceiling System. Clips are optional extras.
Nominal = Tile - 45mm
A
69
27.7 B
C
Clip Fixing System
dimensions C
must be specified
Tile Size
33.2
Tegular Fixing System
dimensions A & B
must be specified
Model shown is Code 0203 + 0106
Bevelled edge border Eggcrate with overall size to suit a
Clip or tegular type Ceiling System. Clips are optional extras.
ØD + 45mm
ØD - 22mm
13
D + 45mm
D - 22mm D - 2mm D
D = Nominal Duct size
Model shown is Code 0136 + 0531
Circular Eggcrate Grille with Flap Damper
2
25
Max = D÷2 + 25mm
G15

GRILLES-Eggcrate
PERFORMANCE DATA FOR
EGGCRATE GRILLES
• To size a grille handling 0.5m3 /s at NR30: Place a
rule on the volume scale at 0.5m 3 /s and at NR30 on
the sound level scale. Read off total pressure and mark
the point at which the rule crosses the pivot point line.
Then rotate the rule about the point on the pivot line
to give a suitable combination of nominal length and
height for the grille. Generally, a duct velocity of
3.5m/s(3.88m/s through the grille) is considered good
design practice for eggcrate grilles.
PERFORMANCE DATA
Sound power and pressure levels are based on exhaust with dampers fully open.
Without dampers subtract 2NR. and multiply pressure drop by 0.9.
Volume (Q)
m 3 /s
150
Nominal Grille Size
mm
150
2.0
1.5
200
200
1.0
0.9
0.8
0.7
0.6
Pressure
drop ∆(Pt)
Pa
Duct
Velocity
m/s
8
250
250
0.5
0.4
50
40
50
40
30
6
5
4
300
300
30
20
3
350
350
0.3
20
10
2
400
400
0.2
10
1
450
450
NRLW
0.15
500
500
550
550
0.1
0.09
600
600
0.08
650
650
0.07
700
700
0.06
750
750
0.05
800
800
0.04
850
900
850
900
850
850
0.03
1000
1000
1100
1100
0.02
1200
Pivot line
1200
G16