NuAire Axus AXB Series Installation And Maintenance

Introduction
The AXUS Bifurcated range of axial flow fans are
designed for 'in duct ' applications. Manufactured from
galvanised steel they are suitable for in, or out door
installation and at any installed angle.
Available for single and three phase supplies.
Case diameters of 315mm to 1250mm.
Unit codes AXB31 to AXB125.
Impellers have been selected at blade angle settings matched to
various motor speeds to perform against the design criteria
laid down in our selection catalogue.
Any attempt to adjust or r eset impeller blade angles will
invalidate warranty .
For full unit description, dimensional, weight and performance
details refer to our catalogue, pages 25 to 30.
Our comprehensive range of ancillaries and silencers are on
pages 51 to 58.
Handling
The fan impeller is carefully balanced and centralised in the fan
case, it is therefore essential that great care is exercised when
handling the unit. Never pass lifting slings through the impeller
(figure 2), check the weight on the rating plate details before
attempting to lift and always use a spreader as shown in figure
1.
Figure 1. Correct method
of lifting using a spreader.
Installation and General Advice
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
Nuaire: A Trading Division of Polypipe Limited Western Industrial Estate Caerphilly United Kingdom CF83 1NA
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Axus AXB
Circular Bifurcated Axial Flow Fans
Installation and Maintenance
Figure 2. The wrong method of lifting
with sling through impeller can cause
case distortion.
8
regulations e.g. IEE, CIBSE, HVCA, ATEX, BSI & EN standards
etc.
If the fan is to be installed in a potentially explosive atmosphere
it will have been designed to ATEX-100 directive 2014/34/EU
and will incorporate motors requiring compatible installation
wiring direct to the motor termination box, to complete this
installation also follow the guidance advice of data sheet
671216.
Before commencing installation check that all material,
including optional ancillaries are available to complete the
installation. Every unit is tested and serialised at works and a
test certificate produced, the details recorded on the fan side
rating plate should also be referred to before handling and
installation.
Any damages or deviations should be immediately
r eported to the seller/supplier/agent quoting the order and
product details from the product rating plate.
Mechanical Installation
Rotate the fan impeller by hand to ensure free and smooth
rotation and that no transit or handling damage has occurred,
observe the direction of flow/direction of rotation arrow and
ensure that :
 All optional accessories such as support brackets,
attenuators, inlet cones, guards, flexible
connectors etc. are assembled to the fan.
 The optional support brackets are correctly
fitted, at any position around the circumference,
but suit the installation plane.
 External termination box is accessible to the
electrician.
 When offering the fan to the ducted
system that both inlet and outlet connections are
perfectly aligned.
 In order to ensure performance is as stated, a
minimum distance of twice the fan diameter is
required between the appliance and any bends in
the ductwork.
Horizontal on Floor or Supported
from Wall etc
Optional resilient mountings should be attached to the unit
mounting brackets at this stage. (See figure 3).
If the unit is supported from a wall, supporting brackets
should be used. Position and align the unit with the ductwork
in both horizontal and vertical planes and pack height under
mounting feet if necessary.
Matching attenuators if required, should be fitted to the fan
with any other accessories before installation.
Matching flanges are fixed to the ductwork ends with rivets.
1
The EMC Directive
2014/30/EU
The Low Voltage
directive
2014/35/EU
cont. on page 2.
24. 10. 19. Leaflet Number 671221