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• Ensure appropriate ventilation for the motor,
for example if adequate temperature equalisa-
tion for a heated motor cannot be achieved
during lengthy idle periods. This applies to us-
age with a frequency converter too.
Install suitable cooling fixtures if the ventilation
is not adequate. Failure to fit cooling or inad-
equately dimensioned cooling can result in de-
struction of the unit.
• Take account of the minimum distances for in-
stallation and maintenance work. Ensure that
there is enough space for installation, cleaning
and maintenance work. Limited available
space may present a source of danger.
• Observe the distances to other façade com-
ponents to avoid sound bridges to the building
structure. If necessary, use decoupling ele-
ments.
16.2 Installation instructions
NOTICE Damage to the unit if the line feed-
through to the terminal box is pre-installed.
Line feedthroughs may be damaged if the con-
nection line is pulled or the unit is lifted by the
line.
Do not pull connection lines or lift the unit using
the lines.
• For permanent installation in ducts with duct
sizes that match the unit type (nominal size).
• For surface mounting on wall with sufficient
load-bearing capacity.
• Any installation position, do not install in damp
rooms with air being transported upwards.
• For ventilation or air extraction, depending on
the installation position.
• Unit connection sockets on both sides for dir-
ect installation in ducts.
• For reducers for connecting to other duct dia-
meters → www.maico-ventilatoren.com.
• Further accessories → www.maico-ventil-
atoren.com.
NOTICE No other accessories may be moun-
ted on the motor.
DANGER Risk of explosion if ignition
transmission prevention passages are not
greased.
Before fixing the cover in the housing, make
sure that the connecting surfaces are clean and
greased, e.g. grease AGIP GR NS 4 or compar-
able.
16.3 Checks before mounting
1. Perform the following checks: D = detailed
check, N = close inspection, S = visual in-
spection
Test schedule
I
Unit corresponds to EPL/zone
requirements of the installation
location.
II
Correct device group.
III Correct temperature class for
units.
IV Degree of protection (IP de-
gree) of units corresponds to
level of protection / group / con-
ductivity.
V Unit power circuit name present
and correct.
VI Housing and connections satis-
factory.
VII Before installing, check that the
motor bearing is functioning
properly.
The impeller is balanced in accordance
with ISO 14694 and ISO 1940-1. The vibration
level of units is checked ex factory in accord-
ance with ISO 14694. The vibration level must
be checked again at the installation site in ac-
cordance with ISO 14694 (vibration values ac-
cording to category and prescribed limit val-
ues).
• Before installation, check the application cat-
egory of the units and the vibration limits for
on-site tests, in particular for the start-up,
alarm and stop operating statuses. Run a vi-
bration check and check the vibration values
after commissioning (ISO 14694, BV-3, Veff.
max. 4.5 mm/sec.). If required, install compon-
ents for avoiding vibration.
• Install the command equipment needed for
starting, stopping, emergency stops or reset-
ting after an emergency stop. Undertake in-
stallations in accordance with the planning
documents and relevant regulations
(EN 60079-14).
• Install a function monitor with alarm function to
warn persons in case of malfunctions/unit fail-
ure and to avoid damage to property.
16.4 Unit installation
1. Check unit for transport damage.
2. Prepare installation site for duct, wall or foot
mounting: Lay duct. For wall installation,
make sure there is a level support surface.
3. Lay a permitted power cable to the installa-
tion site. 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. Transport the unit to the installation site. Note
safety instructions and data in the previous
chapter.
DANGER Risk of explosion/risk of injury
due to incorrectly mounted or falling unit.
Only mount on walls/ducts 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.
5. To avoid sound bridges to the building struc-
ture, observe the distances to other façade
components. If necessary, use isolating ele-
ments.
6. If mounting with FUI mounting foot: Attach the
D N S
matching mounting foot to the unit housing
with the self-tapping screws provided (do not
● ● ●
attach the screws near the impeller). Any in-
stallation position can be selected. Make sure
that there is free access to the terminal box at
● ●
the installation site.
● ●
7. Install the unit and screw it tightly to the wall
or duct or a suitable solid base at all flange
● ● ●
holes (4 pieces). Mounting material of suffi-
cient size should be provided by the cus-
tomer. Note rotation direction and air flow dir-
ection → air direction arrows on unit sticker.
● ● ●
● ● ●
● ● ●
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 SG.. (IP 20 degree of
protection according to EN 60529). When using
non-Maico products, an ignition hazard assess-
ment must be carried out.
8. If the air inlet or outlet is not covered, mount a
permitted protective grille, e.g., MAICO pro-
tective grille SG.. in front of the unit.
9. Ensure a sufficient supply air intake.
10.Fit suitable insulation, sound-absorbing and
installation materials.
17 Electrical connection
DANGER Danger of electric shock.
Prior to accessing the connection terminals, dis-
connect 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 compon-
ents.
Attach a clearly visible warning sign.
Ensure that there is no explosive atmosphere
and/or dust layers.
17.1 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 according to
standard EN 60079-1 (Ex "d") must be used.
• Cable screw connections according to stand-
ard EN 60079-1 (Ex "d") must be used.
• Protective-conductor terminal, at mains end in
terminal box. There is a terminal on the outside
of the unit 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 PTC thermistor triggering system is es-
sential for thermal fusing.
17.2 Electrically connecting the unit
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.
Cable screw connections according to stand-
ard EN 60079-1 (Ex "d") must be used.
• The various types of cable entries (sleeves,
cable screw connections or plugs) certified as
described above must have the following
thread:
Motor Cable entry,
thread
n
ISO
Ter-
min-
als
NPT
11
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