Inhaltsverzeichnis
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EN
Translation of the original oper-
ating instructions
High-performance axial fans for
potentially explosive atmo-
spheres
Preface
The unit is manufactured in accordance with the
ATEX Directive 2014/34/EU and is suitable for
areas subject to explosion hazards.
Before installing and using the units for the
first time, read these instructions carefully
and follow the directions they contain.
The warnings provided indicate hazardous situ-
ations which will result/could result in death or
serious injury (DANGER/WARNING) or minor in-
jury (CAUTION) if not avoided. ATTENTION in-
dicates potential damage to the product or its
surroundings. Keep the instructions safe for use
later on.
1 Figures
Title page with QR code for accessing the
website directly by smartphone app.
Fig. A Installation example
1 Motor
2 Protective grille
3 Centring bush
4 Impeller
5 Cover
6 Wall plate
7 Metal cover
8 Plastic cover
9 Housing
For air flow direction/direction of rotation → Ar-
rows on housing
2 Scope of delivery
Unit with connection cable and explosion protec-
tion terminal box (connection cable pre-wired),
these installation and operating instructions.
For unit serial no. → rating plate on unit. EU de-
claration of conformity at the end of these in-
structions.
3 Qualification of installation,
cleaning and maintenance staff
Installation, commissioning, cleaning and main-
tenance may only be undertaken by qualified
electricians trained and authorised in explo-
sion protection in accordance with Directive
1999/92/EC, Appendix II 2.8. These are qualified
persons in accordance with the above-men-
tioned directive, that are also trained as qualified
electricians. Further provisions of other national
laws must be taken into account.
4 Intended use
The fan is used for air extraction or ventilation of
rooms used for commercial purposes (dye
shops, battery rooms, commercial premises, pro-
duction facilities, etc.) with dangerous, explosive
atmospheres in accordance with 1999/92/EC,
articles 2, (4), (5).
The unit fulfils the safety requirements of Direct-
ive 2014/34/EU for units and protective systems
in potentially explosive atmospheres.
Fan speed control is permitted by means of a
frequency converter.
The DAQ ../. Ex, DAR ../. Ex units are classified
in group II, category 2G for gas atmospheres,
fulfil the type of ignition protection "d"/"c" and are
suitable for use in potentially explosive atmo-
spheres in zones 1 and 2. The suitability can be
found on the rating plate. For outdoor use, the
units must be protected from exposure to the
elements.
The motor housing and the terminal box are de-
signed using type "d" ignition protection, pres-
sure-proof housing. This means that the housing
may contain parts that can ignite an explosive at-
mosphere. In the event of a possible explosion
of an explosive mixture inside the housing, the
housing withstands its pressure and prevents the
transmission of the explosion to the explosive at-
mosphere surrounding the housing.
For this purpose, the points where correspond-
ing surfaces of two parts of the housing or the
connection of housings come together are de-
signed as a gap or passage which prevent the
transmission of the ignition.
5 Non-intended use
The unit must not be used in the following situ-
ations under any circumstances. There is a risk
of death. Read all the safety instructions.
EXPLOSION HAZARD
DANGER Risk of explosion due to igni-
tion of explosive substances if operating
with no PTC thermistor triggering system.
Operate the unit only with an additional PTC
thermistor triggering system according to Direct-
ive 2014/34/EU marked at least with II (2) G ac-
cording to Directive 2014/34/EU.
DANGER Risk of explosion from operat-
ing several units in parallel with one single
PTC thermistor triggering system.
Reliable tripping is not always guaranteed in the
event of a fault.
Do not, under any circumstances, operate sev-
eral units in parallel with one single PTC ther-
mistor triggering system.
DANGER Explosion hazard due to spark
formation by the impeller scraping on the
housing if the air gap is too small.
Ensure a large enough air gap all the way round
between the impeller and housing.
DANGER Risk of explosion when con-
veying explosive liquid particles (e.g. paint),
which may adhere to the unit.
Do not, under any circumstances, use unit to
convey explosive liquid particles.
DANGER Risk of explosion when operat-
ing with abrasive media.
Abrasive media are to be avoided.
DANGER Risk of explosion if operated
outside of the ambient and operating condi-
tions.
In particular, there is a risk of overheating when
operating outside of the permissible operating
temperature range.
Only operate unit within the permitted ambient
and operating conditions and permitted usage
temperature.
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.
DANGER Explosion hazard if the explos-
ive atmosphere cannot be removed when the
supply air intake is insufficient.
This can occur if, e.g., rooms are too air-tight or
room filters are clogged.
Ensure sufficient supply air intake.
Operate unit in permissible air power range.
DANGER Explosion hazard due to unau-
thorised conversions on unit, incorrect in-
stallation or damaged components.
Danger if installation or modification work is car-
ried out by unqualified staff.
Operation not permitted if unit is modified, in-
stallation is incorrect or components are dam-
aged.
Unit is not approved if installation work is carried
out by possibly unqualified staff.
DANGER Risk of explosion when operat-
ing with layers of dust on the motor.
To avoid the motor from overheating, regular in-
spection and cleaning is necessary.
DANGER Risk of explosion when coating
the ignition transmission prevention gaps.
Surface treatment of the ignition transmission
prevention gaps with paint or powder coating is
not permitted.
DANGER Risk of explosion if the ignition
transmission prevention gap is damaged.
Operation of the unit is not permitted if the sur-
faces of the ignition transmission prevention
gaps show damage, e.g. scratches.
Repair on the ignition transmission prevention
passages is not forseen. If the ignition transmis-
sion prevention gaps are damaged, the unit
must no longer be put into operation.
CAUTION Risk of injury if there is no
protection against accidental contact (pro-
tective grille) on the free air inlet/outlet.
In particular, there is danger if the unit is in-
stalled in a manner accessible to people.
Fan may only be operated with an access
guard.
Areas with possible access to rotating parts (im-
peller) should be made safe with an access
guard according to EN ISO 13857, e.g. with
MAICO protective grille SG.. (meets IP 20 de-
gree of protection according to EN 60529).
6 PTC thermistor triggering sys-
tem needed
The motors are equipped, as standard, with PTC
resistors in the windings in accordance with DIN
44082. PTC thermistor triggering systems must
therefore be used, otherwise the conformity will
no longer be met. The PTC thermistor triggering
systems should fulfil the following conditions:
• Type-examination tested in accordance with
Directive 2014/34/EU.
• Labelling according to the directive, at least
II (2) G for use in gas atmospheres.
The PTC thermistor triggering system must be
matched to the PTC thermistor inserted in the
winding in accordance with DIN 44082 (→ see
rating plate).
Tripping must occur:
• in the event of excess temperatures on the
PTC thermistors, i.e., in the stator winding of
the connected motor.
• after a short-circuit in the PTC thermistor cir-
cuit.
• after a wire break in the PTC thermistor circuit.
• after the supply voltage fails in all three ex-
ternal conductors.
9
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