Installation and Maintenance
AXUS AXR High Temperature Axial Fans
4
08. 05. 17. Leaflet Number 671063
Electrical Installation - Motors
Motors comply with BS5000 and IRC34-1; they have sealed for
life ball bearings, IP55 enclosures and class H insulation.
Motors are tested for high temperature operation in accordance
with BS7346 (Part 2) and PR EN 12101-3.
NB Please note the requirements for maintenance of the motor.
Failure to comply with the recommendations will invalidate
any warranty claim.
Wiring General
Electrical supply wiring connection is to an externally mounted
terminal box on the case exterior. The box is pre-wired to the
motor with heat resisting cable.
NOTE: We recommend D.O.L. starting whenever possible.
Units of 4kW and above have provision for Star/Delta starting
if this is required (and is permitted by the relevant authorities).
Two speed motors must be wired for D.O.L. starting only.
Two speed motors, allowing normal ventilation at reduced
noise levels, are available on all units.
Connection details
Fans with motors up to 3.0kW are suitable for connection in
the STAR method and also to a Direct On Line (DOL) starter.
The Star connection will be made at works on all but the EEXD
motors..
Fans with motors of 4.0kW and above will have all six ends of
the motor windings brought out to the terminal box on all but
the EEXD motors. These motors should be connected in the
DELTA mesh for connection to a DOL starter.
4.0kW motors and above are also suitable for connection to a
STAR / DELTA controller, but as smoke fans are required to
start with the minimum of delay in an emergency, this method
of control is not recommended.
Motor overload protection should be provided for continuous
running and routine testing. This protection must be defeated
for emergency operation to allow the fan to run to destruction.
Supply fuses should be H.R.C. type.
Start up procedure
Ensure that the impeller rotation follows the label arrow
indicator on the casing. Should the direction be incorrect on
three phase units, reverse any two of the supply leads. Care
should be taken to set correct rotation as incorrect rotation
may result in damage to the motor.
Equipment should be run for approx. 30 minutes to ensure
correct operation.
If any fault occurs, the equipment should be switched off.
Do not re-start until the fault has been rectified.
This equipment incorporates rotating and moving parts as
well as electrical components and conductors.
It is the responsibility of the installer to ensure that any such
items that remain externally accessible once the
equipment is installed are adequately guarded.
