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Original document
GB IE
Safety Information
Installation, electrical connection and commissioning are only to
be carried out by authorised personnel and in accordance with
the requirements and demands of the high-tension current
regulations. Installation carried out according to EN 60079-14 is
considered to comply with the demands of the high voltage
directive’s requirements. The fan should be installed and
protected to secure against spark generation caused by foreign
objects coming in contact with the impeller. Rust particles must
not be found in the air stream. The transported air should not
corrode the fan’s casing, impeller or axis. (aluminium and steel).
If the fan is not installed in a duct system; a protection grille
should be installed. No moving parts should be accessible after
installation (EN 294). Electrical connection should be made
according to the wiring diagram in the terminal box, markings on
terminal blocks or on cable. Protection earth (PE) should always
be connected. (If there is risk for static electricity a separate
earthing should be attached to the casing of the fan). The fans
may be used in explosive environments ( EE eq II T3 for I-phase
and Eex e II T3 for 3-phase) and for transport of gases, but may
not be connected to a flue-gas duct. Fan-types KTEX, DKEX and
DVEX must be installed with monitoring equipment of type U-
EK230E, monitoring equipment should be labelled
“PTB03ATEX3045”. The monitoring equipment is fitted with a
manual reset and an indicator light that is lit when the motor has
been switched off, the equipment should be placed outside the
danger zone.
If the DVEX fan is equipped with tilting device, it may not be
opened or tilted when explosive atmosphere is present.
In order to prevent the fan from tilting down accidentally, it
must be secured by means of a screw (M6x10). (2 screws from
size 450!). In addition to this, the folded brackets must be
secured by means of one screw (M8x16) each, which also must
be used to secure the fan when it is open to prevent the fan from
tilting down accidentally. Fig, 13
Close the fan with a cautious hand, do not drop it
.
Fan- type EX 140/180 must be fitted with a protective motor
switch that should be adjusted so that it protects the motors from
overload and releases within 15 sec if impellers are obstructed.
In order to determine the release time for the motor protection
there should be a release curve that shows the release time for
the motor protection as a function of the preoscillation current
condition (start-up current status) (IA/IN) for 2,9 < IA/IN < 8 with
ambient temperature of 20C. The motor protection’s release
time is not allowed to deviate more than 20 % from release
curve. To limit the fan motor’s current to the values given in table
1 the static pressure must be adjusted by chocking the fan.
The fans must not be installed outdoors, (with exception DVEX).
Motors for KTEX, DKEX and DVEX have open drainage holes.
Safety accessories (i.e. motor protection, safety grille) may not
be dismounted, short cut or disconnected. Before maintenance,
service or repair make sure that Power supply is interrupted (all-
pole circuit breaker) and that the impellers have come to a
complete stop. Damp cleaning when the fan is supplied with
voltage can cause an electric shock – danger to life!
CAUTION The fans can have sharp edges and corners which
may cause injuries. Be careful when opening the fans service-
hatches (swing-out), the hatch is relatively heavy on several of
the fan sizes.
Transportation and Storage
All fans are packaged at the factory to withstand normal transport
handling. When handling the goods use suitable lifting equipment
in order to avoid damage to fans and personnel. Note! Do not lift
the fans by the mains cable, connection box, and impeller or inlet
cone. Avoid blows and shock loads. Store the fans in a dry place
protected from weather and dirt until final installation. Avoid
excessive storage periods (we recommend a one year max.).
Before installing the fan, check motor bearings for any noise.
Installation
Always refer to Safety information above before installation.
Fans are only intended for static installation. The installation
demands that a classification of the hazardous area has been
made according to valid regulations (in Sweden SRVFS 2004:7
applies) and classification standards (European countries
connected to CENELEC EN 60079-10 applies).
Particles of rust must not be found in the air stream. Monitoring
equipment should be labelled “PTB03ATEX3045”.
EX 140/180 fans must not be speed regulated.
All 3 phase fans are supplied from the factory wired for 400V 3~.
Does not apply to 230V 3-phase (D) fans
CAUTION Do not use metal compression gland fittings with
plastic terminal boxes. Use a dummy plug seal for the
compression gland fitting as well, to ensure that the requirements
for capsule class IP 54 according to IEC 529 could be fulfilled.
Ambient temperature and temperature for transported air should
be in the range -20°C to +40°C, fan type EX140/180 must not be
mounted in direct sunlight. Mount the fan according to the airflow
(see arrow on unit). The fan must be installed so that vibrations
are not transmitted to duct systems or frame of building. (Suitable
accessories like clamps and flanges are available). Make sure
the fan is firmly fixed and stable. The fan can be mounted in any
direction unless stated otherwise. The fans must be assembled
so that service and maintenance can be carried out easily and
safely. Disturbing noise can be avoided by installing silencers
(available accessory). The fans are meant for continuous use
within the temperature range stated.
Duct installations should be carried out so that enclosure class IP
20 (mesh width less than 12mm) is fulfilled on inlet side and IP
10 (mesh width less than 50mm) on outlet side. The parts that
are responsible for the IP protection should be satisfactory
designed regarding strength and material. The cable end from
the fan should be installed so that it is mechanically protected
and suited for use in the surrounding environment. Cable for
installation of fan Ex 180-4(440V 3-phase 60Hz) should be able
to withstand min.100°C. Connecting cable for Ex 140/180 should
have a diameter of. 6.5 - 12 mm and conducting area of 1.5-2.5
mm2. Mains supply for EX-fans must be fixed. In case of external
grounding of the chassis, see Fig. 8 page 2. Earth wire (b)
should be pinned between 2 pieces of tin plates (a). Installation
bracket FKX (set of 2) is available as an accessory. The brackets
should be mounted on the motor, see Fig. 7.
Operation
Always refer to Safety information above before initial operation.
When putting into operation, check:
- That measured data isn’t allowed to exceed the value on the
fan’s nameplate. Rated current can be decreased when fan is set
under pressure. Connection data corresponds to the
specifications on the nameplate: Maximum voltage +6%, -10%,
according to IEC 38. Rated current must not be exceeded at
rated voltage. When speed regulating fans; KTEX, DKEX and
DVEX, by reducing the voltage, the fans should be operated with
a rated voltage from 15% up to 100% of their rated voltage. The
minimum static pressure drop must not be exceeded (Observe
table 1). The fans may not be frequency controlled.
- That the motor protection is working.
- That the rotating direction of the fan corresponds to the arrow
- That the motor is running smoothly (no abnormal noise).
- That no moving parts are touching the chassis or protection
grilles.
- That no extensive on and off regulation is in use. The fans are
intended for continuous operation.
Sound pressure levels above 70dB(A) can occur, see the product
catalogue.
Maintenance, Service and Repair
Always refer to Safety information above before maintenance,
service or repair. Before switching off the fan, make sure that no
EX atmosphere is present. The fan should be cleaned when
necessary, at least 1/year to avoid imbalance and unnecessary
damage to the bearings. Bearings should be tested for
discordant noise. At any sign of wear or at the latest after 40,000
hours a bearing change is required, contact the supplier.
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