Maico ERM 18 Ex e Instrucciones De Montaje Y Funcionamiento página 10

UK
Terminal box cover:
M4 stainless steel cylinder head bolts
Mantle terminals
M20 x 1.5 cable feedthrough:
3x connection thread
Cap nut
Clamping range
3. Wire fan  wiring diagram Fig. D. Insulate any
unnecessary cable cores.
Earthing of fan and duct system
1. Connect PE conductor at mains end in terminal
box with explosion protection.
2. Connect PE conductor duct system to terminal on
outside of fan.
Direction of rotation and air flow
1. Check direction of rotation and air flow  Arrows
on fan housing.
Motor protection switch, on/off switch
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
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
I Screws, cable and line feeds
(direct and indirect), blind closures
are of the correct type, complete
and sealed.
Cable and line type fit for
II
purpose.
III No visible damage on cables and
lines.
IV Electrical connections secure.
V Unused connection
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.
IX Automatic electrical protective
equipment set correctly (automatic
resets not possible).
X Special operating conditions are
satisfied (motor protection switch).
XI All cables and lines which are not
being
used are connected correctly.
XII
Installation with changeable
voltage in agreement with the
documentation.
XIII Electrical insulation clean/dry.
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.
8
18 Commissioning
1.4 Nm
Checks before commissioning
2.5 Nm
1. Perform the following checks: D = detailed check,
2.3 Nm
N = close inspection, S = visual inspection
1.5 Nm
Test schedule
7 ... 13 mm
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 Check capacitor for leak
tightness..
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.
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:
D N S
● ● ●
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.
●
● ● ●
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.
●
● ●
●
DANGER
!
Danger of electric shock.
● Prior to accessing the connection terminals
disconnect all supply circuits.
● Secure against being switched back on, check
D N S
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 protection against reaching in
both sides.
● ● ●
NOTICE: Damage to the unit
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.
D N S
●
Cleaning by a qualified person ( 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.
Maintenance by a qualified person ( 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.
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