Maico EZQ 20/4-E Ex e Instrucciones De Montaje página 9

Checks before mounting
1. Perform the following checks: D = detailed
check, N = close inspection, S = visual inspection
Test schedule
I Unit corresponds to EPL/zone
requirements of the installation
location.
II Correct device group.
Correct temperature class for units. ●
III
IV Degree of protection (IP degree)
of units corresponds to level of
protection / group / conductivity.
V Unit power circuit name present
and correct.
VI Housing and connections
satisfactory.
VII Before installing, check that the
motor bearing is working properly.
Unit mounting
1. Check unit for transport damage.
2. Make a breakthrough at the installation location.
Make sure there is a level support surface.
3. Lay a permitted power cable to the installation
location. Use a connection cable suited to the
unit type.
CAUTION
!
Risk of cuts from metal housing plates
with sharp edges.
Wear personal protective equipment (cut-re-
sistant gloves) for installation.
4. EZQ / EZS 20/4-E Ex e: Transport fan to installa-
tion location. Note safety instructions and data in
chapters 12 to 15.
DANGER
!
fan may vibrate during operation.
The
Should the
attachment come loose, there is a
risk of death if the fan falls as a result of its
inherent weight.
Only mount on walls/ceilings with sufficient
load-bearing capacity and sufficiently dimensioned
mounting material.
NOTICE
Risks of leakages if unit is not sealed tightly
enough. Firmly screw fan down at all flange holes.
5. Install fan and firmly screw fan down to wall at
all flange holes [X] (4 items). Mounting material
of the sufficient size should be provided by the
customer. Note direction of rotation and air flow
 air direction arrows on unit sticker.
6. Check air gap between impeller and housing after
mounting with the gauge provided  Fig. B.
DANGER
!
Explosion hazard when operating without pro-
tective device should foreign bodies fall or be
drawn into the air channel  Risk of death due
to spark formation. Use an approved protective
grille to protect the impeller from contact, anything
falling in and foreign bodies being sucked into the
air channel .
7. If the air inlet or outlet is not covered, mount a
permitted protective grille, e.g. MAICO protec-
tive grille SG... in front of the unit.
8. Ensure a sufficient fresh air supply intake.
9. Fit suitable insulation, sound-deadening and
installation material.
17 Electrical connection  Fig. D
DANGER
!
D N S
Danger from electric shock. Before accessing
● ● ●
the connection terminals, release all power supply
circuits, protect against switching on again, ensure
unit is de-energised, earth and connect the EARTH
with active parts which are to be short-circuited,
● ●
and cover or make inaccessible adjacent energised
●
parts. Attach warning sign in clearly visible place.
● ● ●
Ensure that there is no explosive atmosphere.
NOTICE: Damage to the unit
● ● ●
No speed control allowed.
● ● ●
Operation only permitted:
● ● ●
● with permanent electrical installation.
● with connection cable permitted for explosion risk
areas and load.
● with mains disconnector with a contact opening
of at least 3 mm per pole.
● with permitted voltage and frequency
 rating plate.
● with explosion protection terminal box provided.
● with protective-conductor terminal, at mains end
in terminal box. There is a terminal on the outside
of the fan for earthing a duct system.
● if operating in intended air power range.
● at permitted operating point. The current and
power stated on the rating plate are measured
with free suction and free blow-out. They may be
higher or lower depending on the operating point.
A motor protection switch is essential for
i
thermal fusing.
Connect the fan electrically
1. Switch off power supply circuits, position a visible
sign warning against being accidentally switched
back on.
2. Open terminal box, route cables into terminal
box and screw down with cable feedthrough.
Note tightening torques (in Nm at 20 °C). Check
tightness and tighten if necessary.
Terminal box cover:
M4 stainless steel cylinder head bolts
Mantle terminals
M16 x 1.5 cable feedthrough:
Connection thread
Cap nut
Clamping range
Clamping range + set of reduction
seals
M20 x 1.5 cable feedthrough:
Connection thread
Cap nut
Clamping range
Clamping range + set of reduction
seals
M20 x 1.5 sealing plug:
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:
 Air flow direction drawing over motor,
clockwise direction of rotation
 Direction of rotation of motor looking at
impeller
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 0.4
outside areas subject to explosion hazards.
2. Set motor protection switch to nominal motor
current (not I
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.
1.4 Nm
XII Installation with changeable
voltage in agreement with the
2.5 Nm
documentation.
XIII Electrical insulation clean/dry.
1.8 Nm
1.3 Nm
2. Fit terminal box cover for explosion protection.
4.5 ... 9 mm
Ensure that there are no dirt particles in the
2 ... 6 mm
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
2.3 Nm
1.4 Nm. Check seal integrity of terminal box.
1.5 Nm
7 ... 13 mm
4 ... 8 mm
18 Commissioning
1.0 Nm
Checks before commissioning
1. Perform the following checks: D = detailed
check, N = close inspection, S = visual inspec-
tion
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 15.
).
max
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