6
5 Non-intended use
The fan unit must not be used in the following
situations under any circumstances. There is a
risk of death. Read all the safety instructions.
EX
EXPLOSION HAZARD
!
Explosion hazard due to ignition of explo-
sive substances if operating without
motor
protection switch
.
Only operate fan with an ad-
ditional
motor protection switch
in accordance with
Directive 2014/34/EU,
e.g. MAICO MVEx
(
Chap. 6).
!
Explosion hazardfrom operating several
fans in parallel with one single motor protec-
tion switch. Reliable tripping is not always
guaranteed in the event of a fault.
Do not under any circumstances operate several
fans in parallel with one single PTC thermistor
triggering device.
!
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.
!
Explosion hazard when moving explosive
dusts or solid/liquid particles (e.g. dye), which
may stick to the fan
.
Do not under any circum-
stances use fan to move explosive dusts or solid/
liquid particles.
!
Explosion hazard when operating outside
the ambient and operating conditions, especial-
ly due to overheating when operatingoutside
the permitted usage temperature.
Only operate fan within the permitted ambient
and operating conditions and permitted usage
temperature.
!
Explosion hazard when operating without
protective device should foreign bodies fall or
be drawn into the air channel
Risk of death
due to spark formation.
Be sure to fit a protective
device according to EN 60529, e.g. MAICO SGM ..
Ex protective grille (degree of protection IP 20)
on an uncovered air inlet/outlet. Protection against
reaching in (protective grille in accordance with
EN 13857) is required on both sides,
!
Explosion hazard if the explosive atmos-
phere cannot be removed if the supply air in-
take is insufficient
. This can arise if e.g. rooms
are too air-tight or room filters are clogged.
Ensure sufficient supply air intake. Operate fan in
permissible air power range.
!
Explosion hazard when operating with
frequency converter for speed control. Bearing
currents may be a direct source of ignition.
Operation with frequency converter not permitted.
!
Explosion hazard due to unauthorised
conversions on unit, incorrect mounting or
damaged components. Danger if installation/
modification work is carried out by unqualified
staff.
Operation not permitted if unit is modified,
mounting is incorrect or components are dam-
aged. Unit is not approved if mounting
work is carried out by unqualified staff.
!
CAUTION
Danger of injury if there is no protection
against reaching in/contact (protective grille)
on uncovered air inlet/outlet, especially if
people can access the fan.
Fan may only be operated with
protection against
reaching in
on both sides
. Areas with potential
access to rotating parts (impeller) should be made
safe with protection against reaching in in accord-
ance with EN ISO 13857, e.g. MAICO protective
grille SG.. (satisfies IP 20 degree of protection in
accordance with EN 60529).
6 Motor protection switch needed
Motor protection switches which meet the following
conditions are permitted, otherwise the conformity
ceases to apply:
●
Type-examination in accordance with Directive
2014/34/EU.
● Identification in accordance with Directive at least
II (2) G.
The motor protection switch must be wired in
accordance with wiring diagram Fig. D. The motor
protection switch should be set to the nominal motor
current (not
I
max
).
Prescribed setting/tripping values for motor protecti-
on switch, see rating plate.
The switch must trip in the event of a short-circuit.
Once all causes of faults have been eliminated, the
connected motor must not start up again automati-
cally. It may only be switched on again manually
(switch-on inhibit).
For optimum protection, we recommend the MAICO
MVEx motor protection switch type examined in
accordance with Directive 2014/34/EU – please note
the MVEx operating instructions.
7 Duties of the installer and the operating
company
The fan may only be operated at permissible ambi-
ent and airstream temperatures of -20 to +50 °C and
only if fully mounted.
The fan should be regularly checked and maintained
by an electrician trained in explosion protection
Chapter 19.
Cleaning and maintenance intervals should be
determined by the operating company in accor-
dance with EN 60079-17 – frequency depends on
ambient conditions and anticipated limitations.
Shorten the maintenance intervals in the event
of dust or a corrosive atmosphere.
Additional
safety requirements should be
observed
during mounting and operation, e.g. in
accordance with
●
EC Directive 1999/92/EC, ATEX 137: implemen-
ted in Germany with the Ordinance on Industrial
Safety and Health.
●
EN 60079-14: Design, selection and erection of
electrical installations.
●
the national accident prevention requirements.
8 Safety instructions for users
!
DANGER
Explosion hazard due to spark formation if
foreign bodies are inserted into the unit.
Do not
insert any objects in the unit.
!
CAUTION
Danger of injury due to rotating impeller and
suction. Hair, clothing, jewellery etc. may be
pulled into the fan if you get too close to it.
During operation always keep far enough away to
prevent this from happening.
!
CAUTION
Risks for people (including children) with
reduced physical, sensory or mental capabili-
ties or a lack of knowledge.
The fan may not be
used or cleaned by children or people with reduced
capabilities.
!
CAUTION
Hot motor surfaces may result in skin burns if
touched.
Do not touch hot motor surfaces. Always
wait until the motor has cooled down.
9
Switching unit on / off
The fan is switched on or off with an optional switch.
The fan is designed for continuous operation (S1).
Frequently switching on/off may result in improper
heating and should be avoided.
10 Reversing mode
Fan not suitable for reversing mode.
11
Action to take in the event of a fault
Check whether the motor protection switch has
responded. Unplug the fan from the mains in the
event of operational disturbances. Before switching
on again, have trained specialists perform trou-
bleshooting and remedy faults found. This applies
in particular after the motor protection switch has
tripped. If faults reoccur, send the unit to our factory
for repairs.
Mounting of unit by electrician
trained in explosion protection
12 Safety instructions
Under no circumstances use the unit for purpos-
es other than those for which it was intended
Chapter 5.
!
DANGER
!
Danger from electric shock.
Whenever work-
ing on the fan, release the supply current circuits,
secure to prevent them from switching on again
and ensure the unit is de-energised. Attach warning
sign in clearly visible place. Ensure that there is no
explosive atmosphere.
!
Explosion hazard. Degree of protection is
not ensured if the cables are incorrectly insert-
ed into the terminal box.
Ensure degree of protection by correctly inserting
the cables into the terminal box.
!
Explosion hazard when operating with unit
not fully mounted and if air inlet/outlet is not
correctly protected.
The fan may only be operated if the unit is fully
mounted and with the protective devices
(EN 60529)
for the air channel fitted. Ensure that
foreign bodies cannot be sucked into the unit and
ducts.
!
Explosion hazard/danger 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
supplied by the customer. During installation, do
not allow people to stand under the installation
location.
!
Explosion hazard due to incorrect adjust-
ment.
The rotating fan parts were adjusted in the man-
ufacturer's factory. The unit must not therefore be
taken apart. The temporary removal of the terminal
box cover during unit installation is the only excep-
tion to this restriction.
NOTICE
: Damage to the unit
Loss of IP degree of protection if fan is mount-
ed in damp rooms with air being transported
upwards.
Do not mount the fan in damp rooms
with air being transported upwards.
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