Geovent MEF Series User manual

FAN
LEF/MEF 250 - 630
Version 2.3 04.02.16
INSTRUCTION MANUAL
www.geovent.dk

2

3
1.0 General safety precautions
IMPORTANT - Please study all the instructions before
mounting and commissioning.
This instruction manual is valid for MEF/LEFfans.
LEF/MEF is standard motor where an external
frequency inverter can be connected. More specic
data regarding frequency inverters can be found in the
specic manual for the inverter.
Please keep these instructions in a safe place and
instruct all users in the function and operation of the
product.
Do not dismantle any factory-mounted parts, as it
impedes the commissioning of the equipment.
All electrical installations must be carried out by an
authorised electrician
1.1 Danger
Explosive media – The fan is not suitable for the extrac-
tion of aluminium dust, our, textile dust nor for sawdust
or other media, which are connected with danger of
explosion, without specic approval from Geovent A/S.
Removing the protection net on the fan whilst in opera-
tion involves a risk of mutilation.
Always switch o󰀨 the current when mounting something
on the Fan or when servicing it.
1.2 Field of application
The GEOVENT fan LEF is typically used for general
ventilation as well as for smaller process extraction
jobs, where a high pressure is not required. The fan
MEF is applied for process extraction within the indus-
try for the extraction of welding smoke, exhaust gasses,
grinding dust and vapours.
The fan is neither suitable for the extraction of alumin-
ium dust, our, textile dust nor for sawdust or other
media, which are connected with danger of explosion,
without prior, written approval from Geovent A/S.
1.3 Technical data
Temperature extracted air Max 80°C
Temperature surroundings Max 40°C
Table of content
1.0 General safety precautions...................3
1.1 Danger .................................3
1.2 Field of application . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Technical data ............................3
1.4 Construction .............................3
2.0 Installation ...............................4
2.1 Connection of fan to the mains ...............4
2.2 Connection of fan to the mains (freq. inv.) .......5
2.3 Optional equipment ........................5
2.4 Trial run – exact adjustment .................6
3.0 User instruction – application ................6
4.0 Maintenance..............................6
4.1 Trouble shooting ..........................6
4.2 Dimensions...............................7
4.3 Graphs pressure drop.......................7
5.0 Liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6.0 Declaration of conformity ...................10 Motor
Name plate
Fan
Name plate
G L E F-180-3
Fan Designation
No. of phases on motor
Size of impeller in mm.
Flange motor B5
Backward curved impeller
RPMs: M=2800 L=1400 rpm
EEX-e protected version
If the temperature of the extracted air exceeds 80°C,
special bearings must be used. Please contact your
dealer.
The sound level depends on various factors under
various circumstances. For instance, where in the room
the Fan has been installed, the size of the room, the
temperature in the room, the sound of the room and
also the connection (hose><pipe) of the Fan inuences
the sound level of the fan.
As a main rule, a sound box will reduce the actual
sound level to only half the level without a sound box.
The actual ampere consumption and the kW of the
motor are shown on the metal sign on the fan.
1.4 Construction

4
Fan, mounted on the roof with
roof bracket, supporting angles
with vibration dampers and
outlet ange
Fan, mounted on the
side by means of a wall
bracket, supporting
angles with vibration
dampers and outlet
ange
Fan, mounted on the
bottom by means of a wall
bracket, supporting angles
eith vibration dampers and
outlet ange
Procedure:
1. The fan is solidly xed to the roof/oor or to a
ceiling bracket or wall bracket (see gure 1). The
fan is xed by attaching the vibration dampers with
4 o󰀨 M8 bolts. The Fan is to be mounted in one
of the shown ways. Do not install the Fan with the
intake in vertical direction.
2. The piping is connected to the fan. On the inlet
side, the pipe may be fastened by means of self
cutting screws. Remember to seal the connection
with ller!
3 On the outlet side, the pressure connecting piece
(optional equipment) is attached to the fan by me-
ans of the supplied clamps. Remember to seal the
connection with ller!
4. The pressure connecting piece is then attached to
the piping on the outlet side by means of self-cut-
ting screws. Remember to seal the connection!
2.1 Connection of fan to the mains
- standard motor
1. The fan should only be connected to the mains by
a certied electrician and a motor protection switch
should always be used.
2. Our 3-phase motors may be congured to both
3x230V and 3x400V. From the factory, the motor
has not been congured and the enclosed metal
cover plates are to be mounted in such a way in
the terminal box that they t the voltage.
Fan housing: 100% galvanized steel for optimal corrosi-
on resistance. Brackets are standard on all fans as well
as inlet nozzle with safety net.
Impeller: Backward curved B-impeller in painted Domex
sheet metal.
Motor: B5 ange motor, directly driven IEC/DIN B5
EFF2 quality motor in painted die cast aluminium in
protection class IP-55. Other motor types available on
request.
Console:
5.5kW motors and above or heavy custom motors
come with a supporting console to carry the weight.
Motors of less than 5,5 Kw do not have a console to
support the weight of the motor.
Console
The Fan is supplied assembled and ready for
connection to piping and to the mains.
Before mounting the fan, please make sure that the
optimum installation area is selected.
Is there space enough for carrying out satisfactory
installation/service of the fan? What about optimum
connection possibilities for piping and automatics?
If at all possible, please avoid bends just before the
intake and after the outlet, since since this may reduce
the e󰀨ectivity of the fan.
For outdoor mounting, any noise nuisances for neig-
hbours should be taken into account and also ensure
that the motor is kept out of heavy showers.
Drill holes in motor housing and remove drain plugs
from the motor.
2.0 Installation

5
Always double check the metal sign on the motor
and on the inner side of the cover for current
congurations (diagram).
From 4,0 kW motors and up:
∆ 400… 460V 50/60Hz
Y 690 50Hz
Our 3 phased motors at 4,0 kW and larger are
congurable for both 3x400, 440V and 3x690V.
By default the motor is not congured and the jumper
bars must be installed in the terminal box according to
voltage.
Double check the metal sign on the motor and the
inside of the lid for current conguration.
3.Connection diagram 1-phase motor
(Not suitable for regulation) up to 2,2 kW
2.2 Connection of fan to the mains
- Motors with integrated
frequency inverter.
2.3 Installation of optional equipment
Mounting of sound box
From the factory, the fan will be installed in the sound
box (optional equipment). The box must be mounted
on horizontal surfaces and may only be mounted with
vertical outlet.
Mounting of frequency converter
Our standard 3-phase motors are particularly suitable
for frequency converter operation.
Suggested application – frequency inverter
Installation of frequency inverter
Our standard 3-phased LEF/MEF fans are highly
suitable for operation with frequency inverter allowing
for pressure control and speed control.
Draft of installation with frequency inverter:
Terminal box
Frequency inverter
Switch
3x400V+ PE
3x400V
3-conductort
0-10DC
Multi
box
Channel –spiro duc
1x230VAC
Suction tube
Draft of installation with
pressure guard and motor guard:
Draft of installation with potentionmeter:

6
In case of problems with the fan, the following items
may be reviewed in order to check whether:
The volume of air or the pressure is too low:
• Wrong direction of operation of the wheel.
May be due to wrong electrical installation.
Please double-check the direction of rotation.
Change two phases, if necessary.
• Leaky channel system.
• Poor inlet/outlet possibilities near the Fan may
reduce the yield (e.g. 90° bend before the inlet).
• Damaged wheel.
• The rotation speed has been set lower.
• If the temperature deviates substantially from the
lab measurements, where the temperature was
20°C with an atmospheric pressure of 101.4 kPa.
• The dampers have not been correctly adjusted.
• The central lid on the sound box is turned the
wrong way and thus blocks the air.
• The suction net has been blocked by cotton waste,
a cloth or the like.
Vibrations and noise
• The base is not even/stable.
• Foreign objects are stuck in the fan.
• Damaged wheel or motor.
• The wheel is loose.
• The wheel may have become unstable, for instance
as a result of dirt on the impellers.
• The wheel is rotating in the wrong direction.
• The fan supplies more air than for which the
equipment has been dimensioned.
Use adjustment damper.
• Loose bolts or screws.
The motor is overtaxed
• The cabling of the motor is not correct.
• The shaft has been bent.
• The fan has over-capacity in relation to the
resistance in the system.
Use adjustment damper.
• The speed of the motor is too high.
• Defective motor – please contact your dealer!
4.1 Trouble-shooting
Remember to always use a
motor protection switch!
Always use adjustment damper!
2.4 Trial run – exact adjustment
After the installation has been completed, please check
whether there are any vibrations in the fan.
We recommend checking whether the fan supplies the
correct volume of air, for which the equipment has been
dimensioned. I.e. control the volume of air and make
sure that it does not exceed the ampere capacity of the
motor.
3.0 User instruction – application
When extracting large quantities of air, containing dust,
the fan wheel may get out of balance due to dirt on the
wheel. In order to avoid this, we recommend using a
lter.
In many cases, the fan is started by pushing the green
button on the motor protection switch (if automatics are
not used).
The fan will not work as intended if:
• unauthorised parts have been mounted on the fan
(e.g. unauthorised wheel).
• the wheel runs in the wrong direction. It will still
work, but the capacity will be reduced to a third of
the normal capacity.
• no motor protection switch is used.
4.0 Maintenance
Periodic maintenance
In principle, the motor is maintenance-free because
of the factory-mounted, completely closed special ball
bearings, which do not require any maintenance.
Replacement of worn bearings should only be handled
by an electrician.
The wheel and the fan housing should be cleaned
every year or according to requirement. The wheel and
the housing may be cleaned by means of a soft brush
and detergent. Remember to disconnect the power
before the washing and to wipe the parts afterwards
with a dry cloth. This operation results in a longer life of
the fan.
Access to the inside of the fan housing and the impel-
ler, can be gained by screwing o󰀨 the umbracko screws
on the back of the fan.
Remember to always cut the power.
Soundbox - optional

7
J
E
A
L
G
C
F
H
B
K
øD
M
I
1
4
6 x M6
M8
5 x M8
ød
ø9
48
N
4.2 Table of dimensions
Table LEF/MEF 250 - 630 (LEX/MEX)
Type 250 315 355 400 450 500 560 630
A 410 510 570 648 715 758 907 989
B 500 700 700 800 800 800 800 800
C 500 600 680 756 850 871 1070 1175
øD 250 315 400 400 500 500 630 630
ød *** *** *** *** *** *** *** ***
E 215 260 284 308 340 345 425 446
F 230 290 329 370 408 421 523 563
G210 240 272 304 340 362 440 467
H460 660 660 760 760 760 760 760
I ** ** ** ** ** ** ** **
J 170 210 234 260 290 295 375 400
K 320 400 450 500 560 510 709 800
M 637 720 797 965 1045 1065 1340 1340
N 185 225 250 275 305 263 380 425
VÆGT 38* 43* 48* 56* 71* 81* 125* 135*
* The weight depends on which size motor
** Depending on the motor size
*** Depending on which size pressuretub
4.3 Pressure drop
RPM. & resulting frequency
Example: A pressure controlled fan with frequency inverter, is
connected to 4 extraction arms. If all arms are in use, is the
extracted air ow 4.200 m3/h at 1.200 Pa. If the air ew is reduced
to tow extraction arms at the same time, the air ow will regulate
to 2.000 m3/h & the power consumption will be reduced by 50%
150
500
Airflow [m³/h]
[Pa] Fan LEF / MEF-355
1000 1500 2000 2500 3000 3500 4000 4500 5000 5500
300
450
600
750
900
1050
1200
1350
1500
1800
2100
2400
n=3540
(2p - 62Hz)
82%
78%
46%
51%
68%
75%
n=2860
(2p - 50Hz)
3,0kW
1,5kW
0,75kW
n=1460
(4p - 50Hz)
(2p - 25Hz)
n=2240
(2p - 39Hz)
0,25kW
88dB(A)
79dB(A)
69dB(A)
n=2507
(2p - 44Hz)
1,1kW
82dB(A)
2,2kW
n=3277
(2p - 57Hz)
85dB(A)
89dB(A)
E󰀩ciency
Sound level in
outlet without
duct
Pressure drop at
a specic air ow
Powe
consumption
►
Fan designation
►
►
►
►
125
200
Air Flow [m³/h]
[Pa] Fan LEF / MEF-250
400 600 800 1000 1200 1400 1600 1800 2000 2200
250
375
500
625
750
875
1000
1125
1250
1375
1500
1625 n=3995
(2p - 70Hz)
83%
48%
64%
76%
69%
n=2860
(2p - 50Hz)
n=1460
(4p - 50Hz)
(2p - 25Hz)
57dB(A)
n=2560
(2p - 45Hz)
0,55kW
0,37kW
0,09kW
0,25kW
79dB(A)
73B(A)
70B(A)
n=3480
(2p - 61Hz)
0,18kW
76dB(A)

200
750
Air flow [m³/h]
[Pa]
Fan LEF / MEF-400
1500 2250 3000 3750 4500 5250 6000 6750 7500 8250
400
600
800
1000
1200
1400
1600
1800
2000
2200
85%
75%
50%
82%
75%
80%
68%
2400
2600
2800 n=3538rpm
(2p - 61Hz)
n=2915rpm
(2p - 50Hz)
n=2675rpm
(2p - 46Hz)
n=1375rpm
(4p - 50Hz)
n=2150rpm
(2p - 37Hz)
0,37kW
1,1kW
4,0kW
5,5kW
2,2kW
86dB(A)
84dB(A)
79dB(A)
70dB(A)
90dB(A)
250
1000
Air flow [m³/h]
[Pa] Fan LEF / MEF-450
2000 3000 4000 5000 6000 7000 8000 9000 10000 11000
500
750
1000
1250
1500
1750
2000
2250
2500
2750
3000
3250 n=3306
(2p - 57Hz)
n=2900
(2p - 50Hz)
86%
81%
74%
49%
62%
74%
81%
n=2552
(2p - 44Hz)
7,5kW
5,5kW
4,0kW
2,2kW
n=1395
(4p - 50Hz)
n=2120
(2p - 36Hz)
0,75kW
87dB(A)
89dB(A)
83dB(A)
73dB(A)
92dB(A)
130
300
Air flow [m³/h]
[Pa] Fan LEF / MEF-315
600 900 1200 1500 1800 2100 2400 2700 3000 3300
260
390
520
650
780
910
1040
1170
1300
1430
1560
1690 n=3200
(2p - 56Hz)
84%
48%
71%
80%
74%
n=2860
(2p - 50Hz)
0,75kW
n=1460
(4p - 50Hz)
(2p - 25Hz)
n=2280
(2p - 40Hz)
64dB(A)
n=2560
(2p - 45Hz)
1,1kW
0,55kW
0,37kW
0,12kW
0,25kW
n=2010
(2p - 35Hz)
59%
79dB(A)
77dB(A)
73dB(A)
72dB(A)
81dB(A)
150
500
Air flow [m³/h]
[Pa] Fan LEF / MEF-355
1000 1500 2000 2500 3000 3500 4000 4500 5000 5500
300
450
600
750
900
1050
1200
1350
1500
1800
2100
2400
n=3540
(2p - 62Hz)
82%
78%
46%
51%
68%
75%
n=2860
(2p - 50Hz)
3,0kW
1,5kW
0,75kW
n=1460
(4p - 50Hz)
(2p - 25Hz)
n=2240
(2p - 39Hz)
0,25kW
88dB(A)
79dB(A)
69dB(A)
n=2507
(2p - 44Hz)
1,1kW
82dB(A)
2,2kW
n=3277
(2p - 57Hz)
85dB(A)
89dB(A)
8

300
1200
Air flow [m³/h]
[Pa] Fan MEF-500
2400 3600 4800 6000 7200 8400 9600 10800 12000 13200
600
900
1200
1500
1800
2100
2400
2700
3000
3300
3600
3900
n=2900
(2p - 50Hz)
87%
82%
77%
51%
68%
76%
83%
n=2690
(2p - 46Hz)
7,5kW
5,5kW
2,2kW
n=1585
(2p - 27Hz)
n=2120
(2p - 36Hz)
1,1kW
92dB(A)
87dB(A)
80dB(A)
n=2430
(2p - 42Hz)
4,0kW
90dB(A)
11kW
n=3300
(2p - 57Hz)
97dB(A)
94dB(A)
250
2000
Airflow [m³/h]
[Pa] Fan LEF / MEF-630
4000 6000 8000 10000 12000 14000 16000 18000 20000 22000
500
750
1000
1250
1500
1750
2000
2250
2500
2750
79% 86%
82%
74%
62%
52%
11kW
7,5kW
5,5kW
4,0kW
n=1440rpm
(4p - 50 Hz)
n=2030rpm
(4p - 70 Hz)
n=1584rpm
(4p - 55 Hz)
92 dB(A)
89 dB(A)
84 dB(A)
3000
3250
3500
3750
4000
24000 26000
n=2600rpm
(2p - 46 Hz)
22 kW
94 dB(A)
n=1830rpm
(4p - 63 Hz)
15kW
n=2300rpm
(2p - 41 Hz)
86 dB(A)
97 dB(A)
9
2000
Volumenstrøm [m³/h]
[Pa] Ventilator LEF/MEF-560
4000 6000 8000 10000 12000 14000 16000 18000 20000 22000
1000
2000
3000
4000
n=2930
(2p - 50Hz)
79%
55%
65%
65%55%
n=2445
(2p - 42Hz)
18,5kW
11kW
7,5kW
n=1440
(4p - 50Hz)
n=2146
(2p - 37Hz)
2,2kW
94dB(A)
98dB(A)
91dB(A)
79dB(A)
Fan LEF / MEF-560
Air ow (m3/h)

5.0 Liability
Warranty
Geovent A/S grants a warranty for products, which are
defective, when it can be proved that the defects are
due to poor manufacture or materials
on the part of Geovent A/S. The warranty comprises
remedial action (reparation or exchange) until one year
after date of shipment. No claims can be made against
Geovent A/S in relation to loss of earnings or
consequential loss as a result of defects on products
from Geovent A/S.
Wear parts like fan impellers are not included in the
warranty.
User liability
In order for Geovent A/S to be capable of granting the
declared warranty, the user/tter must follow this
manual in all respects.
Under no circumstances may the products be changed
in any way, without prior written agreement with
Geovent A/S.
6.0 Declaration of conformity
has been manufactured in compliance with the
directions of the Directive Council 2006/42/EEC,
regarding machine safety, changes of directive
95/16/EEC and following standards:
UNE-EN ISO 12100: 2012
Date: 04/02 - 2016
Position: Managing Director
Name: Thomas Molsen
10

HOVEDGADEN 86 • DK-8831 LØGSTRUP
Tlf.: ([phone] • e-mail: [email protected]