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© FANTECH
2016
INSTALLATION, WIRING DIAGRAMS & FAN TROUBLE SHOOTING
INSTALLATION & MAINTENANCE
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Motors fitted with thermistor or thermostatic protection should have these wired into the
starting contactors’ control circuit to interrupt motor power supply on winding
temperature rise.
Wires marked ‘TK’ are for internal thermal contacts which can be wired directly into the
contactor controller circuit. Alternatively, thermal protection devices can be installed into
the control circuit therefore negating the need to use the ‘TK’ contacts. Failure to
connect thermal protection devices will void warranty.
DIRECTION OF ROTATION
The correct rotation and direction of air flow is shown on each individual
fan. If backward-curved centrifugal fans rotate in the wrong direction, the
motor may overload and the motor warranty will be void.
To change the direction of rotation on three-phase motors, interchange
any two supply leads. All single-phase motors will rotate in the correct
direction when correctly connected.
STARTING
All fans are suitable for direct-on-line starting by switch or automatically by contactor up
to and including 5.5kW. The number of starts should be limited to no more than four per
hour or, in the case of motors of less than 1kW, no more than eight starts per hour. This
would be subject to local supply regulations.
Check List
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check power supply
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check fan is free to rotate
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check overloads are fitted
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ensure ductwork is free of debris
O
check rotation of fan
O
check the motor amperage draw does not exceed nameplate rating
SAFETY
Rotating fan impellers can be a danger to personnel.
The following precautions must be taken:-
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electrically isolate the fan motor prior to undertaking any work.
O
regularly check impeller fasteners for tightness.
O
where fans are accessible to personnel or directly exposed to habitable areas,
it is the responsibility of the installers to ensure that fans will have guards
which comply with the latest Australian Standard AS4024.1
safeguarding of machinery.
O
prior to fan start-up, ensure loose debris will not be sucked into the fan.
All ductwork should be clean.
INSTALLATION INSTRUCTIONS
Important Notes:
With all horizontally mounted axial fans it is preferable that the fan is installed with the
motor mounted on top of the motor plate. ie. not suspended under the motor plate.
Vertical Mounting - Consideration is needed for PowerLine and Axial Duct or
Square Plate Fans where the motor is to be vertically mounted.
Motors which are to be mounted with the shaft vertically down and the impeller
at the base of the Fan, the motor must be air stream rated or be provided with a
suitable cover (available on request) to ensure foreign bodies are prevented
from entering the motor.
Special care is needed when fitting protective covers to motors to ensure air
flow is not impeded.
To maintain IP rating, special additional measures may be required to protect
the motor against the ingress of water or foreign bodies.
Please contact Fantech or motor manufacturer for further information.
For outside installations, IP66 rated conduit and fittings must be used.
To obtain rated performance, the following recommendations should be followed:-
Duct Mounted Fans - General
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inlet and outlet ductwork should be free from obstructions.
O
duct transitions should be a maximum of 15°.
O
avoid sharp bends on inlet or outlet.
O
do not use ductwork smaller in area than the fan.
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flexible duct connections should be taut.
O
ductwork connections should be well aligned.
O
inlet cones must be fitted to free inlet applications.
O
ensure that the fan orientation is correct for the required air flow direction.
Rotation
Backward Curved
Impeller, 6-12 Blades
Forward Curved
Impeller, 30-60 Blades
Axial Flow
Impeller
Rotation
Rotation
Air
Flow
Air
Flow
Air
Flow
Multiflow
Impeller
Rotation