Nuaire Group AXUS Series Installation And Maintenance

1.0 Introduction

The Nuaire Short Cased Axial Fan range is produced
in a range of sizes from 250mm to 1600mm diameter.
Cases are manufactured from various materials such
as pre-galvanised steel, stainless steel or hot dipped
galvanised steel. Impellers are selected to meet the specific
performance and are available in a variety of materials to
ensure suitability for the application.
Units are available for single and three phase supply.

2.0 Handling and Storage

The fan impeller is carefully balanced prior to despatch
and great care must be exercised when handling the unit.
This will ensure that the case is not damaged or distorted,
causing the impeller to foul against the casing. The fan
should be stored on a flat surface and the impeller rotated
at regular intervals.
Figure 1. Correct method
of lifting/removing from
a pallet.

3.0 Installation

Installation must be carried out by competent
personnel in accordance with good industry practice,
the appropriate authority and in conformance with all
statutory and governing regulations.
Any damages or deviations should be immediately
reported to Nuaire quoting the order/Arc number and
,
product details, detailed on the product rating label.
Nuaire Limited Western Industrial Estate Caerphilly United Kingdom CF83 1NA
T: 029 2085 8400 F: 029 2085 8444 E: info@nuaire.co.uk W: www.nuaire.co.uk
AXUS
Circular Short Cased Axial Flow Fans
Installation and Maintenance
Figure 2. Moving/positioning
unit to application using a
spreader.
Prior to installation the impeller should be rotated by hand
to ensure free and smooth rotation and that no transit or
handling damage has occurred.
General advice
Ensure that impeller and motor are free from obstruction
and that all optional accessories such as guards and bell
mouths are securely fastened before commencing unit
start up.
When operating at low temperatures, ice formation can
occur, and suitable prevention should be adopted to avoid
ice build up.
Motors
In general motors are totally enclosed, protected to IP55
(Dust and low pressure water jets) and have an integral
terminal box. Motors may incorporate drain holes to allow
any condensation to escape from the motor casing. It is
essential that drain hole plugs positioned at the lowest
point of the motor are removed to allow condensate to
drain out of the motor. For vertical applications an
optional capillary drain plug is advised.
All bearings are pre-packed with grease and sealed for life
requiring no further lubrication.
Connection Details
Electrical connections are made directly to the motor
terminal box as standard. Check that the voltage on the fan
rating label is suitable for your supply. Full load and
starting currents are also indicated.
Motors below 4kW are designed for Direct On Line starting
whilst 4kW and above are suitable for Direct On Line or
Star/Delta starting.
Start Up Procedure
On start up ensure the impeller rotation follows the arrow
indicator on the fan casing. Should the direction be
incorrect on a three phase unit reverse any two of the
supply leads.
Single phase rotational direction is set at the factory and
should not be altered. Equipment should be run for
approximately 30 minutes to ensure correct operatIon.
If any fault occurs the equipment should be switched off
and not re-started until the fault has been rectified.
Reversing Fans
If the unit is specified as 'reversing fan' care must be taken
when designing the control gear to ensure that enough time
is allowed for the fan impeller to come to a standstill before
switching to the opposite rotation.
1
The EMC Directive
2014/30/EU
The Low Voltage
directive
2014/35/EU
19. 10. 16. Leaflet Number 671351