Maico EZQ 20/4-E Ex e Instructions De Montage Et Mode D'emploi page 10

UK
�����������������
1. Check direction of rotation and air flow  Arrows
on fan housing:
 Air flow direction drawing over motor,
clockwise direction of rotation
 Direction of rotation of motor looking at
impeller
�������������������
1. Install motor protection switch and wire in accord-
ance with wiring diagram ( wiring diagram,
Fig. D, terminals 4, 5 and 6).
Recommendation: Only install MAICO MVEx 0.4
outside areas subject to explosion hazards.
2. Set motor protection switch to nominal motor
current (not I ).
max
3. Fit an On/Off switch provided by the customer.
Checking electrical connection
1. Perform the following checks: D = detailed
check, N = close inspection, S = visual inspection
Test schedule
Screws, cable and line feeds
I
(direct and indirect), blind closures
are of the correct type, complete
and sealed.
II Cable and line type fit for
purpose.
No visible damage on cables and
III
lines.
Electrical connections secure.
IV
Unused connection
V
terminals tightened.
VI Insulation resistance (IR) of motor
windings satisfactory.
VII Earth connections, including any
additional potential compensation
connections, are correct
(e.g. connections are tight, conduc-
tor cross-sections are sufficient).
VIII Error loop impedance (TN
system) or earth resistance (IT
system) satisfactory.
Automatic electrical protective
IX
equipment set correctly (automatic
resets not possible).
X Special operating conditions are
satisfied (motor protection switch).
All cables and lines which are not
XI
being
used are connected correctly.
XII Installation with changeable
voltage in agreement with the
documentation.
Electrical insulation clean/dry.
XIII
2. Fit terminal box cover for explosion protection.
Ensure that there are no dirt particles in the
terminal box and that the seal of the terminal box
cover has close contact all the way around the
terminal box. Note tightening torques of
1.4 Nm. Check seal integrity of terminal box.
18 Commissioning
Checks before commissioning
1. Perform the following checks: D = detailed
check, N = close inspection, S = visual inspec-
tion
8
Test schedule
I No damage or unauthorised
changes on unit.
II Condition of terminal box seal
satisfactory. Ensure connections
are sealed.
III No evidence of water or dust
entering the housing in compliance
with the IP rating.
IV Encapsulated components undam-
aged
V Impeller at sufficient distance from
housing (air gap), see Chapter 16.
VI Air flow not hampered. No foreign
bodies in the air section.
VII Sealing of shafts, cables, ducts
and/or conduits satisfactory.
VIII Conduit system and transition to
mixed system undamaged.
IX Unit has sufficient protection from
corrosion, weather, vibration and
other interfering factors.
D N S
X Accumulations of dust or dirt not
● ● ●
excessive.
Checking correct functioning
●
1. Switch on unit and perform the following checks
according to the test schedule:
● ● ●
Test schedule
I Direction of rotation / air flow
●
direction
●
II Ensure correct power consumption
The rating current
●
( rating plate) may be higher or
lower depending on local condi-
● ● ●
tions (duct distance,
altitude, temperatures).
III Thermal safety is ensured by the
motor protection switch
system.
●
Setting of motor protection switch
●
1. Set motor protection switch to 0.32 A.
With a starting current ratio of
I /I = 1.5, the motor must be switched off within
● A N
time t = 300 seconds.
E
●
19 Cleaning, maintenance
According to 1999/92/EC the workplace and
● ●
work equipment has to be maintained with due
regard for safety. The points listed in EN 60079-
17 must be taken into account and performed.
●
The intervals should be determined by the operating
company in accordance with EN 60079-17 and may
be extended if a sufficient maintenance concept is
used – frequency depending on ambient conditions
and anticipated restrictions. The maintenance
intervals are to be shortened in case of dust or a
corrosive atmosphere.
D N
S
DANGER
!
● ● ●
Danger of electric shock.
● Prior to accessing the connection terminals
●
disconnect all supply circuits.
● Secure against being switched back on, check
that no voltage is present.
●
● Earth and connect the EARTH with active parts
which are to be short-circuited.
● Cover or block off neighbouring live parts.
● ● Attach a clearly visible warning sign.
Ensure that there is no explosive atmosphere
and/or dust layers..
●
● ● ●
CAUTION
!
Hot motor surfaces may result in skin burns if
● ● ●
touched.
Do not touch hot motor surfaces. Wait until the
●
motor has cooled before undertaking cleaning and
maintenance work.
● ● ●
CAUTION
!
● ● ● Danger of injury if there is no protection
against reaching /
contact (protective grille) on the uncovered air
inlet/outlet. Fan may only be operated with protec-
tion against reaching in
NOTICE: Damage to the unit
D N S
Units with pre-installed line feedthrough to the
●
terminal box may be damaged if the connec-
tion line is pulled or the unit is lifted using the
●
line. Do not pull connection lines or lift the unit
using the lines.
����������������  Chapter 3)
Regularly clean fan at appropriate intervals with
●
a damp cloth, especially after long periods out of
service. Clean fan at shorter intervals if you expect
layers of dust to accumulate on the impeller and
other parts of the fan.
����������������� Chapter 3)
The fan should be regularly checked and main-
tained. In particular, ensure:
● unimpaired flow in the air channel.
● the effectiveness of the protective grilles.
● compliance with the permitted temperatures.
● quiet bearings. Bearing life of 40 000 hours,
depending on application.
● cables are secure in the terminal box.
● potential damage to terminal box, cable
screw-connections, sealing plugs and cables.
● secure routing of cables.
During regular safety checks (maintenance interval),
undertake a complete check in accordance with the
test schedules in Chapters 16, 17 and 18.
This involves checking the function of safety compo-
nents, air gap, power consumption, bearing noise,
damage and disproportional vibration (e.g. impeller
imbalance). Remove dirt and foreign particles.
Repairs
Have defective fans repaired or overhauled only by
a certified repair workshop.
on both sides.