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LRE/D Centrifugal Fan Series
RECTANGULAR CABINET FAN (LRE / D)
The Lti Rectangular Cabinet Fan units are the result of long experience in the
development and manufacturing of ventilation systems. The partnership between
highly motivated Lti employees and world known component suppliers guarantees
quality products on the highest technical level and precise reliability.
The Lti advantages:
The Lti quality:
The Lti accessories:
The Lti performance curves
Noise Levels:
The Lti selection criteria:
IRRTUM UND TECHNISCHE ANDERUNGEN VORBEHALTEN!
NO LIABILITY FOR ERRORS!-SUBJECT TO TECHNICAL MODIFIOCATION
1
non-flammable mineral wool infill, for thermal and acoustic insulation for LRE/D model
Rated Data:Z
V
S
Y
Reference Code
GENERAL INFORMATION (LRE / D)Amount of air exchanges / sound pressure (reference values)
Room Amount of LPA
Air Exchanges Max. Per Hour [dB]
Toilets - private 5 40
Toilets - public 10-15 50
Bath rooms 5-8 45
Libraries 5 40
Offices 5-8 45
Dyeworks (Ex) 10-15 70
Colour spray 30-50 70
Works (Ex)
Garages, public 5 70
Restaurants 10-12 55
Casinos 7 40
Class rooms 7 40
Cinemas 5-8 35
Conference rooms 8 45
Kitchens, private 20-25 50
Kitchens, public 25-30 60
Assembly works 5-8 65
Welding shops 20-30 80
Gymnasiums 5 50
Sales rooms 4-8 55
Assembly halls 5-10 45
Waiting rooms 6 45
Laundries 15-20 65
Work shops with polluted air
highly polluted 10-20 70
lowly polluted 5 70
Living rooms
day 3-6 40
night 3-6 30
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LR E I 190 2
Noise Levels
Noise Level
Area Noise level [dB(A)]
day night
Industrial zones
pure 70 70
mainly 65 50
Mixed area 60 45
Residential areas
pure 55 30
mainly 55 40
Spa areas 45 35
10
20
30
40
50
60Red
ucti
on
of
no
ise level [d
B]
1 2 3 4 5 10
Distance [m]
100 200
15
10
5
00 2 5
Amount of sound sources of the
same sound level.
10 25
Incr e
ase
of
no
ise level [d
B]
Air"ow Conversion Chart
Conversion of cfm in m3/h
Cubic meter / hour [m3/h]
1000 m3/h = 588,5 cfm
1000cfm = 1700 m3/h
1 cfm = 1.7 m3/h
Cu
bic
feet
/ m
inu
te [
cfm
]
02000 4000 6000 8000 10000 12000 14000
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
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SAFETY AND WARRANTY
Please note the following advice for installation and operation of Lti fans:
IRRTUM UND TECHNISCHE ANDERUNGEN VORBEHALTEN!
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LRE(External Rotor wiring Diagram)
Single Phase AC Motor 230V with operating capcitor
and thermal contact.
LRE(Induction Motor Connection Diagram)
Single Phase AC Motor 230V
TERMINAL BLOCK CONNECTION DIAGRAMS
LRD(Induction Motor Connection Diagram)
Three Phase AC Motor With Cage Rotor
LRD(External Rotor wiring Diagram)
Three phase Motor 400V, Three phase motor with 2
speeds by Δ / Y connection
Size 400 - 500Size 400 - 500
Size 190 - 355
L
Z UU
Z
Clockwise – Rotation
U1 = brown
U2 = blue
Z1 = black
Z2 = orange
TK = white
PE = yellow
L
U1 = brown
V1 = blue
W1 = black
U2 = red
V2 = grey
W2 = orange
Δ = Connection for high speed
Y = Connection for low speed
A = Utilisation of SDM 250B
Δ
Y
A
L
L
L
L
L
L
U
U
U
U
U
U
V
V
V
V
V
V
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LRE 220-2 / LREI 220-2
Voltage/Frequency V/50 Hz 230
Phase -
Power
Current
Maximum air "ow
R.p.m
Max. temp. of transported air
when speed-controlled
Sound Pressure Level at 3m
Insulated Sound Pressure
Level at 3m
Weight
Insulation class, motor
Enclosure class, motor
Capacitor
Motor protection
Speed control, #ve-step
Speed control, #ve-step high/low
Speed control, stepless
L
L
0
400
PS[P
a]P
[W]
350
300
250
200
150
100
50
0
50
100
150
200
0.060
400
0.12
600
0.17
800
qV[m3/h]
qV[m3/s]
LRE/LREI 220-2
0.22
IRRTUM UND TECHNISCHE ANDERUNGEN VORBEHALTEN!
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The LR series is designed for installation in ducts
LRE/I220-2 comes with polyamide backward curve
casing of LRE/I220-2 is made of galvanized steel sheet
LRE/I 225-2
Voltage/Frequency V/50 Hz 230
Phase -
Power
Current
Maximum air "ow
R.p.m
Max. temp. of transported air
when speed-controlled
Sound pressure level at 3 m
Insulated Sound Pressure
Level at 3m
Weight
Insulation class, motor
Enclosure class, motor
Capacitor
Motor protection
Speed control, #ve-step
Speed control, #ve-step high/low
Speed control, stepless
L
L
500
450
400
350
300
250
200
150
100
50
0
200
150
100P
S[P
a]P
[W]
1000
0.28
800
0.22
600
0.17
400
0.12
200
0.06
0
0
qV[m3/s]
LRE/LREI 225-2
qV[m3/h]
IRRTUM UND TECHNISCHE ANDERUNGEN VORBEHALTEN!
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The LR series is designed for installation in ducts
LRE/I225-2 comes with polyamide backward curve
casing of LRE/I225-2 is made of galvanized steel sheet
LRE 250-4 /LREI 250-4
Voltage/Frequency V/50 Hz 230
Phase -
Power
Current
Maximum air "ow
R.p.m
Max. temp. of transported air
when speed-controlled
Insulated Sound Pressure
Level at 3m
Sound pressure level at 3m
Weight
Insulation class, motor
Enclosure class, motor
Capacitor
Motor protection
Speed control, #ve-step
Speed control, #ve-step high/low
L
L
150
100
50
0
100
50
0
800
0,22
600
0,17
400
0,11
200
0,05
0
0
LRE/LREI 250-4
PS[P
a]P
[W]
qV[m3/h]
qV[m3/s]
IRRTUM UND TECHNISCHE ANDERUNGEN VORBEHALTEN!
NO LIABILITY FOR ERRORS!-SUBJECT TO TECHNICAL MODIFIOCATION8
The LR series is designed for installation in ducts
LRE/I250-4 comes with polyamide backward curve
casing of LRE/I250-4 is made of galvanized steel sheet
LRE 280-4 /LREI 280-4
Voltage/Frequency V/50 Hz 230
Phase -
Power
Current
Maximum air "ow
R.p.m
Max. temp. of transported air
when speed-controlled
Insulated Sound Pressure
Level at 3m
Sound pressure level at 3m
Weight
Insulation class, motor
Enclosure class, motor
Capacitor
Motor protection
Speed control, #ve-step
Speed control, #ve-step high/low
Speed control, stepless
L
L
200
150
100
50
0
90
60
30
0
0 15001200900600300
0 0.08 0.17 0.25 0.33 0.42
LRE/LREI 280-4
PS[P
a]P
[W]
qV[m3/s]
qV[m3/h]
IRRTUM UND TECHNISCHE ANDERUNGEN VORBEHALTEN!
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The LR series is designed for installation in ducts
LRE/I280-4 comes with polyamide backward curve
casing of LRE/I280-4 is made of galvanized steel sheet
LRE/I 310-4 / LRD/I 310V
(Dual Speed)
Voltage/Frequency V/50 Hz 230V 400V
Phase -
Power
Current
Maximum air "ow
R.p.m
Max. temp. of
transported air
when speed-controlled
Sound pressure level at 3m
Insulated Sound Pressure
Level at 3m
Weight
Insulation class, motor
Enclosure class, motor
Capacitor -
Motor protection
Speed control, #ve-step
Speed control, #ve-step
high/low
Two speed switch max 16A
Speed control, stepless
L
L
200
150
100
50
0
90
60
30
0
0 15001200900600300
0 0,08 0,17 0,25 0,33 0,42
LRE/LREI 310-4
LRD/LRDI 310V
PS[P
a]P
[W]
qV[m3/h]
qV[m3/s]
IRRTUM UND TECHNISCHE ANDERUNGEN VORBEHALTEN!
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The LR series is designed for installation in ducts
LR 310 series comes with aluminium backward curve
LR 310 series is made of galvanized steel sheet and 25
LRE/I 355-4
Voltage/Frequency V/50 Hz 230
Phase -
Power
Current
Maximum air "ow
R.p.m
Max. temp. of transported air
when speed-controlled
Sound Pressure Level at 3m
Insulated Sound Pressure
Level at 3m
Weight
Insulation class, motor
Enclosure class, motor
Capacitor
Motor protection
Speed control, #ve-step
Speed control, #ve-step high/low
Speed control, D/Y
two step 400 V-
Speed control, stepless
Speed control, electronic
L
L
400
350
300
250
200
150
100
50
0
300
200
100
0
0 500 1000 1500 2000 2500
0 0.14 0.28 0.42 0.56 0.69
LRE/LREI 355-4
PS[P
a]P
[W]
qV[m3/s]
qV[m3/h]
IRRTUM UND TECHNISCHE ANDERUNGEN VORBEHALTEN!
NO LIABILITY FOR ERRORS!-SUBJECT TO TECHNICAL MODIFIOCATION11
The LR series is designed for installation in ducts
LRE/I355-4 comes with aluminium backward curve
casing of LRE/I355-4 is made of galvanized steel sheet
Voltage/Frequency V/Hz 400
Phase -
Power
Current
Maximum air "ow
R.p.m
Max. temp. of transported air
when speed-controlled
Sound pressure level at 3m
Insulated Sound Pressure
Level at 3m
Weight
Insulation class, motor
Enclosure class, motor
Capacitor -
Motor protection
Speed Control, #ve speed
Speed control, stepless -
Speed control, electronic
L
L
100
0
50
150
200
300
250
400
350
300
200
100
0
0 500 1000 1500 2000 2500
0 0.690.560.420.280.14
12
LRD/LRDI 355VPS[P
a]P
[W]
qV[m3/h]
qV[m3/s]
X
X 2-Speed version: Low speed
IRRTUM UND TECHNISCHE ANDERUNGEN VORBEHALTEN!
NO LIABILITY FOR ERRORS!-SUBJECT TO TECHNICAL MODIFIOCATION
The LR series is designed for installation in ducts
LRE/I355V comes with aluminium backward curve
LRD/I 355V is made of galvanized steel sheet and 25
LRE/I 400-4
-
Voltage/Frequency V/50 Hz 230
Phase -
Power
Current
Maximum air "ow
R.p.m
Max. temp. of transported air
when speed-controlled
Sound pressure level at 3m
Insulated Sound Pressure
Level at 3m
Weight
Insulation class, motor
Enclosure class, motor
Capacitor
Motor protection
Speed control, #ve-step
Speed control, #ve-step high/low
Speed control, D/Y
two step 400V-
Speed control, stepless
Speed control, electronic
L
L
0
0 4000300020001000
0.28 0.56 0.83 1.11
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450
300
150
400
250
0
150
250
350
450
550
100
350
200
50
LRE/LREI 400-4
PS[P
a]P
[W]
qV[m3/s]
qV[m3/h]
The LR series is designed for installation in ducts
LRE/I 440-4 comes with aluminium backward curve
400-4 is made of galvanized steel sheet and 25
tured from galvanized sheet steel. The casing of LRE/I
LRD/I 400V
Voltage/Frequency V/50 Hz 400V
Phase -
Power
Current
Maximum air "ow
R.p.m
Max. temp. of
transported air
when speed-controlled
Sound pressure level at 3m
Insulated Sound Pressure
Level at 3m
Weight
Insulation class, motor
Enclosure class, motor
Capacitor -
Motor protection
Speed control, #ve-step
Speed control,
#ve-step high/low
Two speed switch 230V
max 16A
Speed control, stepless -
Speed control, electronic
L
L
0
0 1000 2000 3000 4000
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450
300
150
400
250
100
350
200
0
50
150
250
350
450
LRD/LRDI 400VPS[P
a]P
[W]
qV[m3/s]
qV[m3/h]
X
0.28 0.56 0.83 1.11
X 2-Speed version: Low speed
The LR series is designed for installation in ducts
LRE/I 400V comes with aluminium backward curve
sheet steel. The casing of LRD/I400V is made of
LRE/I 400-6
Voltage/Frequency V/50 Hz 230
Phase -
Power
Current
Maximum air "ow
R.p.m
Max. temp. of transported air
when speed-controlled
Sound Pressure Level at 3m
Insulated Sound Pressure
evel at 3m
Weight
Insulation class, motor
Enclosure class, motor
Capacitor
Motor protection
Speed control, #ve-step
Speed control, #ve-step high/low
Speed control, D/Y
two step 400 V-
Speed control, stepless
Speed control, electronic
L
L
0 0.14 0.28 0.42 0.56 0.70
0 500 1000 1500 2000 2500
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200
180
120
0
60
160
100
40
140
80
20
40
80
120
160
200
LRE/LREI 400-6
PS[P
a]P
[W]
qV[m3/h]
qV[m3/s]
The LR series is designed for installation in ducts
LRE/I 400-6 comes with aluminium backward curve
casing of LRE/I 400-6 is made of galvanized steel sheet
LRE/I 450-4
Voltage/Frequency V/50 Hz 230
Phase -
Power
Current
Maximum air "ow
R.p.m
Max. temp. of transported air
when speed-controlled
Sound Pressure Level at 3m
Insulated Sound Pressure
Level at 3m
Weight
Insulation class, motor
Enclosure class, motor
Capacitor
Motor protection
Speed control, #ve-step
Speed control, #ve-step high/low
Speed control, D/Y
two step 400 V-
Speed control, stepless
Speed control, electronic
L
L
0 0.28 0.830.56 1.11 1.39
0 1000 2000 3000 4000 5000
IRRTUM UND TECHNISCHE ANDERUNGEN VORBEHALTEN!
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50
0
100
150
200
250
300
350
400
450
500
200
400
600
800
LRE/LREI 450-4
PS[P
a]P
[W]
qV[m3/h]
qV[m3/s]
The LR series is designed for installation in ducts
LRE/I 450-4 comes with aluminium backward curve
LRE/I450-4 is made of galvanized steel sheet and
LRD/I 450V (Dua" Speed)
Voltage/Frequency V/50 Hz 400V
Phase -
Power
Current
Maximum air "ow
R.p.m
Max. temp. of transported air
when speed-controlled
Sound pressure level at 3m
Insulated Sound Pressure
Level at 3m
Weight
Insulation class, motor
Enclosure class, motor
Capacitor -
Motor protection
Speed control, #ve-step
Speed control, #ve-step high/low
Two speed switch
max 16A
Speed control, stepless -
Speed control,
electronic
L
L
0 0.80.4
1 2 3
2
5
4 5
1.20.2 1.00.6 1.4 1.6
0 2000 40001000 3000 5000
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0
400
200
600
100
500
300
0
800
600
400
200
450VPS[P
a]P
[W]
qV[m3/h]
qV[m3/s]
X
X 2-Speed version: Low speed
The LR series is designed for installation in ducts
LRE/I 450V comes with aluminium backward curve
LRD/I 450V is made of galvanized steel sheet and
LRE 450-6
Voltage/Frequency V/50 Hz 230
Phase -
Power
Current
Maximum air "ow
R.p.m
Max. temp. of transported air
when speed-controlled
Sound Pressure Level at 3m
Insulated Sound Pressure
Level at 3m
Weight
Insulation class, motor
Enclosure class, motor
Capacitor
Motor protection
Speed control, #ve-step
Speed control, #ve-step high/low
Speed control, D/Y
two step 400 V-
Speed control, stepless
Speed control, electronic
L
L
0 0.28 0.830.56 1.11
0 20001000 3000 4000
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0
100
200
50
150
250
100
150
200
250
300
PS[P
a]P
[W]
qV[m3/s]
qV[m3/h]
LRE/LREI 450-6
The LR series is designed for installation in ducts
LRE/I 450-6 comes with aluminium backward curve
casing of LRE/I450-6 is made of galvanized steel sheet
LRD/I 500-4
Voltage/Frequency V/50 Hz 400V
Phase -
Power
Current
Maximum air "ow
R.p.m
Max. temp. of
transported air
when speed-controlled
Sound pressure level at 3m
Insulated Sound Pressure
Level at 3m
Weight
Insulation class, motor
Enclosure class, motor
Capacitor -
Motor protection
L
L
0 0.56 1.11 1.67 2.22
0 2000 4000 6000 8000
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450
0
100
200
300
400
500
600
700
400
800
1200
1600
LRD/LRDI 500-4
PS[P
a]P
[W]
qV[m3/s]
qV[m3/h]
The LRD/I 500 series is designed for installation in
LRD/I 500 comes with aluminium backward curve
The casing of LRD/I 500 is made of galvanized steel
LRE/I 500-4
Voltage/Frequency V/50 Hz 230
Phase -
Power
Current
Maximum air "ow
R.p.m
Max. temp. of transported air
when speed-controlled
Sound Pressure
Level at 1m
Insulated Sound
Pressure Leve" at 3m
Weight
Insulation class, motor
Enclosure class, motor
Capacitor
Motor protection
L
L
0 0.56 1.11 1.67 2.22
0 2000 4000 6000 8000
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0
100
200
300
400
500
600
700
800
400
800
1200
1600
LRE/LREI 500-4
PS[P
a]P
[W]
qV[m3/h]
qV[m3/s]
The LRE/I 500 series is designed for installation in ducts
LRE/I 500-4 comes with aluminium backward curve
LRE/I500-4 is made of galvanized steel sheet and minimum
DIMENSIONS
LRE/LRD A B C D LREI/LRDI A B C D
190 250 400 375 350 190 250 400 375 350
220 250 400 375 350 220 250 400 375 350
225 250 400 375 350 225 250 400 375 350
250 250 400 375 350 250 250 400 375 350
280 400 450 425 400 280 400 450 425 400
310 400 450 425 400 310 500 550 525 500
355 500 550 525 500 355 500 550 525 500
400 600 650 625 600 400 600 650 625 600
450 600 650 625 600 450 600 650 625 600
500 650 710 680 650 500 650 710 680 650
IRRTUM UND TECHNISCHE ANDERUNGEN VORBEHALTEN!
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