Electrical Connection - Maico EZQ 20/4-E Ex e Original-Montage- Und Betriebsanleitung

EN
Test schedule
V Unit power circuit name present
and correct.
VI Housing and connections satis-
factory.
VI Before installing, check that the
I motor bearing is working properly.
17.3 Unit installation
1. Check unit for transport damage.
2. Prepare installation location for duct, wall or
foot mounting: Lay ventilation duct or flexible
duct. If mounting on wall, make sure there is
a level support surface.
3. Lay a permitted power cable to the installa-
tion location. Use a connection cable suited
to the unit type.
CAUTION Risk of cuts from metal hous-
ing plates with sharp edges.
Wear personal protective equipment (cut-resist-
ant gloves) for installation.
4. EZQ / EZS 20/4-E Ex e / t: Transport fan to
installation location. Note safety instructions
and data in the previous chapter.
DANGER Explosion hazard/risk of injury
from an incorrectly mounted fan or a falling
fan.
Only mount on walls/ceilings with sufficient load-
bearing capacity and sufficiently dimensioned
mounting material.
Mounting material is to be provided by the cus-
tomer.
During installation, do not allow people to stand
under the installation location.
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] (4x). Mounting material
of the sufficient size should be provided by
the customer. Note rotation direction and air
flow direction → air direction arrows on unit
sticker.
6. Check air gap between impeller and housing
after installation with the gauge provided →
Fig B.
DANGER Risk of explosion when operat-
ing without protective device, should foreign
bodies fall or be drawn into the air duct.
Risk of death due to spark formation.
Be sure to fit any free air inlet/outlet with a pro-
tective device that meets the requirements of
EN 13857 and is suitable for Ex areas, e.g. with
MAICO protective grille SGM ... Ex (IP 20 de-
gree of protection according to EN 60529).
When using non-Maico products, an ignition
hazard assessment must be carried out.
7. If the air inlet or outlet is not covered, mount a
permitted protective grille, e.g. MAICO SGM-
Ex protective grille in front of the unit → Fig-
ure C.
8. Ensure a sufficient fresh air supply intake.
9. Fit suitable insulation, sound-absorbing and
installation materials.
10
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18 Electrical connection

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DANGER Danger of electric shock.
Prior to accessing the connection terminals, dis-
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connect all supply circuits.
Secure against being switched back on, check
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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 compon-
ents.
Attach a clearly visible warning sign.
Ensure that there is no explosive atmosphere
and/or dust layers.
NOTICE Damage to unit due to speed con-
trol.
No speed control allowed.
18.1 Operating conditions
Operation only permitted, if following conditions
are met:
• Permanently installed electrical installation.
• Connection cable permitted for explosion risk
areas and load.
• Mains disconnect device with a contact open-
ing of at least 3 mm per pole.
• Permitted voltage and frequency → rating
plate.
• Explosion protection terminal box provided.
• Protective-conductor terminal, at mains end in
terminal box. There is a terminal on the outside
of the fan for earthing a duct system.
• Operating in intended air power range.
• 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
thermal fusing.
18.2 Connect the fan electrically
1. Switch off power supply circuits, position a
visible sign warning against being accident-
ally 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 cyl-
inder head bolts
Mantle terminals
M16 x 1.5 cable feedthrough:
Connection thread
Cap nut
Clamping area
Clamping area + set of
reduction seals
M20 x 1.5 cable feedthrough:
Connection thread
Cap nut
Clamping area
Clamping area + set of
reduction seals
M20 x 1.5 sealing plug: 1.0 Nm
3. Electrically wire fan → Wiring diagram. Insu-
late exposed wire ends which are not
needed.
18.3 Earthing of fan and duct system
1. Connect PE conductor at mains end in ter-
minal box with explosion protection.
2. Connect PE conductor duct system to ter-
minal on outside of fan.
18.4 Direction of rotation and air
flow direction
1. Check direction of rotation and air flow direc-
tion → Arrows on fan housing.
① Air flow direction drawing via motor, clock-
wise direction of rotation
② Direction of rotation motor facing impeller
18.5 Motor protection switch, on/off
switch
1. Install motor protection switch and wire in ac-
cordance with wiring diagram (→ wiring dia-
gram, Fig. D, terminals 4, 5 and 6).
Recommendation: It is imperative that
MAICO MVEx be installed outside the area
with a potentially explosive atmosphere.
2. Set motor protection switch to nominal motor
current (not I
3. Fit an On/Off switch provided by the cus-
tomer.
18.6 Checking electrical connection
1. Perform the following checks: D = detailed
check, N = close inspection, S = visual in-
spection
Test schedule
I Screws, cable and line feeds (dir-
ect and indirect), blind closures
are of the correct type, complete
and sealed.
II Cable and line type appropriate
for the 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.
VI Earth connections, including any
I additional potential compensation
connections, are correct (e.g. con-
nections are tight, conductor
1.4 Nm cross-sections are sufficient).
VI Error loop impedance (TN sys-
II tem) or earth resistance (IT sys-
2.5 Nm
tem) satisfactory.
IX Automatic electrical protective
1.8 Nm
equipment set correctly (auto-
1.3 Nm
matic resets not possible).
4.5 ... 9 mm
X Special operating conditions are
satisfied (motor protection switch).
2 ... 6 mm
XI All cables and lines, which are not
being used, are connected cor-
rectly.
2.3 Nm
XI Installation with changeable
1.5 Nm
I voltage in agreement with the
documentation.
7 ... 13 mm
XI Electrical insulation clean/dry.
4 ... 8 mm
II
2. Fit terminal box cover for explosion protec-
tion. Ensure that there are no dirt particles in
the terminal box and that the seal of the ter-
minal box cover has close contact all the way
around the terminal box. Note tightening
torques of 1.4 Nm. Check seal integrity of ter-
minal box.
).
max
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