Installation and Maintenance
AXUS SVT High Temperature Impulse Axial Fans
2
Electrical Information
Motors are totally enclosed and protected to IP55 (Dust and
low pressure water jets). Motors comply with BS5000,
EN600034 and IEC34-1. Enclosures are to IP55 with class H
insulation. Motors are tested in accordance with EN12101-3
2002. NB Please note the requirements for maintenance of
the motor.
Failure to comply with the recommendations will
invalidate any warranty claim.
Wiring
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.
Connection details
Check that the voltage full load and starting current on the fan
rating label is suitable for your supply.
Two speed motors
Two speed motors are supplied Tap or Pam single winding.
All two speed
motors
are designed for Direct On Line starting
on both speeds only unless otherwise specified.
Note: Tap wound motors require a three contactor control.
Individual wiring instructions are included with each unit.
Leaflet Number 671256 November 2006
Dimensions
B
C
A
Airflow
Model
A
B
C
Weight
SVT1
2610
320 602mm
94kg
SVT2 2610
400 602mm 110kg
Figure 6.
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.
Maintenance
General
Nuaire recommends all products maintained in accordance with
the HVCA “Standard Maintenance Specification for Mechanical
Services in Buildings” - Volume II Ventilating and Air
Conditioning. For guidance only due to the different periods
of operation from the time of installation and conditions of
use, no rigid inspection and maintenance periods can be
recommended. We suggest, therefore that the inspection and
if necessary cleaning should be carried out at regular intervals
of 1000 hours of operation or 3 months, whichever is the sooner.
For a routine inspection, check the tightness of all nuts, keys,
grub screws and endbolts etc. Remove any build up of dirt or
dust with a brush.
Motors
On going maintenance - Induction motors, by their very nature
require minimal maintenance. However, a regular regime of
inspection is recommended to ensure minor problems do not
escalate into breakdowns. Typical intervals would be 1000
hours of operation or 3 months, whichever is the sooner.
Checklist
■
No visible damage i.e. impeller cracked,fan cowl bent, foot
cracked etc.
■
No accumulation of dust or fibres on the frame or around
the fan inlet.
■
No significant corrosion of the lifting lugs/eyebolts.
■
No excessive vibration.
■
No loose fasteners.
■
Cables and earths are sound.
■
Sealing of the motor and gland plate in good condition.
■
Insulation resistance adequate, imperative this is checked
after prolonged shutdown.
Two speed 3 phase TAP/PAM wound motors (D.O.L.
starting both speeds)
Two speed 3 phase TAP/PAM wound motors (D.O.L.
starting both speeds)
A matched Nuaire Inverter Speed Control is available.
Please contact Nuaire.
1U
1V
1W
2U
2V
2W
400V 3 phase
50Hz supply
Link
(if no control
is used)
High speed
Low speed
L1
L2
L3
1U
1V
1W
2U
2V
2W
L1
L2
L3
NOTE: If a two speed starter is used it must have 3 contactors.
Individual wiring diagrams are included with each unit.
Figure 6.
Figure 5.
