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Safety Information
This machinery must not be put into operation until prior to reading
mounting instructions and safety information.
All fans are intended for transportation of air in air handling systems.
If installed in non-heated rooms, the fan casing has to be insulated in
order to avoid condensation. They are meant to be used after building
them into machines or duct systems or after contact protection grid
has been installed. (SS-EN 294). Fans with duct connections must
be connected to ducts on both sides (inlet/outlet). When there is a
risk of water entering the motor, via the ducts, external protection is
required. No moving parts shall be accessible after installation. The
fans are not to be used in hazardous environments or connected to
flue ducts. The fans must not be installed outdoors, (with exception
of roof fans and fans with, for this purpose, corresponding IP class).
If the fans are installed without insulation in non-heated areas there
is a risk of condensation. Safety accessories (i.e. motor protection,
safety grille) may not be dismounted, short cut or disconnected.
CAUTION Before servicing or maintenance, switch off power, (all-
pole circuit breaker), and make sure the impeller has come a
standstill. CAUTION The fans can have sharp edges and corners
which may cause injuries. CAUTION Be careful when opening the
fans service-hatches (swing-out), the fan and motor assembled on
the hatch is relatively heavy.
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. Do not lift the fans by
the connecting cable, connection box, impeller or inlet cone. Avoid
blows and shock loads. Store the fans in a dry place protected from
weather and dirt until final installation.
Installation
Refer to Safety information above. Installation, electrical connection
and commissioning are only to be carried out by authorised personnel
and in accordance with requirements and demands. Electrical con-
nection according to the wiring diagram in the terminal box, markings
on terminal blocks or on cable. All 3 phase fans are delivered from
factory in 400V 3~ connection. CAUTION Do not use metal compres-
sion gland fittings with plastic terminal boxes. Use a dummy plug seal
for the compression gland fitting as well. Fans with thermal contacts
with external leads (TK) must always be connected to external motor
protection. Assemble the fan in the direction of 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 fast
clamps and diffusers are available). Make sure the assembly of 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 performed easily and safely. Disturbing
noise can be avoided by installing silencer (available accessory).
For frequency regulation an all pole sinus filter must be mounted
between motor and frequency controller (version all poles: phase to
phase, phase to earth). Fans are meant for continuous use within the
temperature range stated.
Operation
Before initial operation, check the following:
- Electrical connection has been properly completed.
- Protective conductor has been connected.
- Motor protection installed.
- Safety devices in place (protection grid)
- Leftover installation materials and foreign materials have been
removed from the casing.
When putting into operation, check the following:
- Connection data corresponds to the specifications on the name
plate: Maximum voltage +6%, -10%, according to IEC 38. Rated
current must not be exceeded with more than 5% at rated voltage.
CAUTION When speed regulating by reducing the voltage the
motor current may exceed the rated current at a lower voltage.
In this case the motor windings are protected by the thermal contact.
The minimum static fall of pressure must observed.
- That the motor protection is functional. The direction of rotation
should correspond to direction-of-rotation arrow (3 phase).
- Smoothness of motor operation, (no abnormal noises).
- Fans must only be operated by a person that has sustainable
knowledge or education within this field or handling must be carried
out with the supervision of such person.
Maintenance, Service and Repair
Before maintenance, service or repair make sure that:
- Power supply is interrupted (all-pole circuit breaker).
- Fan impeller has come to a complete standstill
- Observe personnel safety regulations!
The fan should be cleaned when necessary, at least 1/year to avoid
imbalance and unnecessary damage to the bearings. A filter will
prolong the time interval between each cleaning of the fan. (It is
sometimes recommended to install a filter guard). The fan bearings
are maintenance free and should only be replaced if damaged. Do
not use a high-pressure cleaner (steam jet) when cleaning the fan.
Make sure the fan impeller's balance weights are not moved or the
fan impeller distorted. Listen for abnormal operating noise.
Resetting of the thermal trips
Automatic thermal trips resets it selves after the motor has cooled.
(TW) Manual thermal trips (TB) are reset by using a pointed object
and pushing a button on the motor (the fan's outlet side) or through
a hole in the cover. Manual thermal trips (SP1) are reset by discon-
necting the mains for approx. 10-60min.
Fans with external leads for thermal trips (TK) are reset from the
external motor protection. Make sure the fan has not been blocked or
that the motor protection has tripped. Contact the supplier if the motor
does not start after controlling and/or resetting the motor protection.
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