LMT LINEAR GRILLES - Madel

LMT LINEAR GRILLES
The LMT series grilles are designed to be used in air-conditioning, ventilation
and heating.
The distance between the blades and the thickness of them give great
strength and an aesthetic appearance which makes them ideal for living
rooms and locations where decorative factors are of prime importance.
They are suitable for supply and extraction in particular or for use in air
curtains. They can be placed in ceilings, walls, separate units, fan coils
and on the ground.
1 09/04

CLASSIFICATION
LMT Linear wall grilles with deflexion
angle of the blades of 0º.
LMT-15 Linear wall grilles with deflexion
angle of the blades of 15º.
LMT-S Linear floor grilles with deflexion
angle of the blades of 0º.
LMT-S-15 Linear floor grilles with
deflexion angle of the blades of 15º.
LMT-SW LMT-S grille suitable for side
wall mounting.
It requires the wood CW mounting frame.
LMT-SW-15 LMT-S-15 grille suitable for
wall mounting.
It requires the wood CW mounting frame.
2 09/04

LMT-DD Linear grilles with a second row
of moveable blades. Blades deflexion of
0º or 15º.
EMP Arrangement of blades without
frame, particularly useful in separate
units or fan-coils. Blades deflexion of
0º or 15º.
MATERIAL
Extruded aluminium grilles.
All the grilles are provided with seal on
the back of the frame in order that the
perimeter in contact with walls, ceiling,
ducts, etc... is airtight.
ADDITIONAL ACCESSORIES
SP Opposed blades damper to regulate
the air flow.
The damper is operated by an easily
accessible key inside the grille.
Constructed from electro-zinc steel,
painted in black colour.
The damper is held in place by “S”
springs.
3 09/04

TP
FD Flap damper with inclined moveable
control. Constructed in galvanised steel
with black enamel.
TP Hinged access doors.
4 09/04

LMT-S
LMT-SW+CW
18
FIXING SYSTEMS
(T) The grille is fixed in place with screws.
Suitable for (LMT, LMT-15, LMT-DD,
LMT-DD-15).
(S) The grille is fixed in place with clips
(standard supply).
It requires the CM mounting frame. When
assembling with metallic frame,
measures H and L increase 8 mm.
Suitable for (LMT, LMT-15, LMT-DD,
LMT-DD-15).
(O) The grille is fixed in place by a hidden
screw.
It requires the CM mounting frame. When
assembling with metallic frame,
measures H and L increase 8 mm.
Suitable for (LMT, LMT-15, LMT-DD,
LMT-DD-15).
1) Direct.
(Suitable for LMT-S, LMT-S-15, EMP,
EMP-15)
1) Wood mounting frame CW.
(Suitable for LMT-SW, LMT-SW-15)
5 09/04

FINISHES
Wall Grilles:
AA Anodised in matt silver.
M9016 Lacquer in white colour similar
to RAL 9016.
RAL… Lacquer in other colours (RAL
specifications).
Floor Grilles:
AA Anodised in matt silver.
RAL… Lacquer in other colours (RAL
specifications).
6 09/04

7
LMT
FREE FACE AREA m2.
L
H
75
100
150
200
250
300
350
400
450
500
RECOMMENDED VELOCITY.
Vmin
m/s
2
0,004 0,006 0,007 0,009 0,010 0,012 0,014 0,015 0,019 0,022 0,025 0,028 0,032
0,006 0,008 0,010 0,013 0,015 0,017 0,020 0,022 0,027 0,031 0,036 0,041 0,045
0,010 0,014 0,018 0,023 0,026 0,030 0,034 0,038 0,046 0,054 0,062 0,070 0,078
Determination of air flow.
Measuring the Vf in different points
of the grille, we find the Vfmed.
Q (l/s) = Vfmed (m/s) * Afree (m2) * 1000
Q (m3/h) = Vfmed (m/s) * Afree (m2) * 3600
CORRECTION FACTOR FOR Lwa1.
Afree m2
Lwa1(kf)
Vmax
m/s
3.5
Weighted noise level related to
Afree = 0,1m2.
SERIES
150
0,014
0,018
0,022
0,026
0,030
0,034
0,038
Lwa = Lwa1 + Kf
200
0,019
0,025
0,030 0,038
0,036 0,046
0,041 0,052
0,046
0,052
250
0,025
0,031
0,059
0,066
300
0,031
0,039
0,047
0,056
0,064
0,072
0,080
0,01 0,02 0,05 0,1 0,2 0,4
-9 -6 -3 - +4 +7
350
0,036
0,045
0,084
0,094
Afree (m2)
FREE VELOCITY, PRESSURE LOSS AND SOUND POWER LEVEL.
DPt (Pa)
400
0,041
0,052
0,097
0,108
1 1.5
0.6
0.5
0.4
0.3
0.2
0.15
0.1
0.08
0.06
0.05
0.04
0,03
0,02
200
150
100
80
60
40
30
20
15
10
5
4
3
2
1
1
450
0,046
0,059
0,110
0,122
0,052
0,065
0,122
0,136
25
500
1.5
150
200
600 700
0,063
0,079
300
LwA1 [dB(A)]
30 35 40
2
500
400
2500
1800
1600
1300
1000
900
700
Vf (m/s)
2 3 4 5 6 7 8 9 10
45
6500
5500
4500
3500
3000
3 4 5 6
Vf (m/s)
50
0,106
0,133
0,054 0,063 0,071 0,079 0,095 0,112 0,128 0,145 0,161
0,066 0,076 0,085 0,095 0,115 0,135 0,155 0,174 0,194
0,075 0,086 0,098 0,109 0,131 0,154 0,177 0,199 0,222
0,148
0,164
0,073
0,093
0,173
0,192
800
0,084
0,106
0,198
0,220
900
0,095
0,120
0,224
0,249
1000
0,249
0,277
10000
8000
Q (m3/h)
25% open
50% open
100% open
7 8
9 10
LMT-GR1-09/04

LMT SERIES
8
AL 0,5 (m)
THROW WITHOUT CEILING EFFECT.
8
6,8
5,6
4,8
4
3,2
2,8
2,4
2
1,6
1,2
0,8
AL 0,3 (m)
0,4 0,6 1
>800
13,3
11,3
9,3
8
6,6
5,3
4,6
4
3,3
2,6
2
1,3
AL 0,2 (m)
20
17
14
12
10
7 8
6
5
4
3
2
POSITION OF BLADES 0
WITHOUT CEILING EFFECT.
AL0,2
40
Lb = AL0,2 x 0,53
bv = AL0,2 x 0,12
bh = AL0,2 x 0,4
Lb
AL0,2
Lb
60 80 100 150
o
bv
bh
450
400
350
300
250
200
150
100
200
200
300
350
450
600
300
300 400 600 800 1000
3
Q ( m / h)
400
500
600
750
300
500
1000
350
600
250
350
400
600
800
1000
POSITION OF BLADES 0
WITH CEILING EFFECT.
AL'0,2 = AL0,2 x 1,33
Lb = AL0,2 x 0,7
bv = Al0,2 x 0,106
bh = Al0,2 x 0,53
1500 2000
Lb
AL'0,2
Lb
450
600
750
900
500
650
800
1000
400
500
700
450
600
900
1000
800
o
3000
bv
bh
LMT-GR2-09/04