NuAire Axus AXB Series Instruction Manual

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 reset 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.
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
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
reported 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.
Axus AXB
C rcular B furcated Ax al Flow Fans
Installat on and Ma ntenance
F gure 1. Correct method
of l ft ng us ng a spreader.
F gure 2. The wrong method of l ft ng
w th sl ng through mpeller can cause
case d stort on.
48
124. 10. 19. Leaflet Number 671221
cont. on page 2.
The EMC Directive
2014/30/EU
The Low Voltage
directive
2014/35/EU
Nuaire: A Trading Division of Polypipe Limited Western Industrial Estate Caerphilly United Kingdom CF83 1NA
T: 029 2088 5911 F: 029 2088 7033 E: [email protected] W: www.nuaire.co.uk

Suspended Horizontally or Vertically
A.V. mountings must be arranged so that they are used in
compression only. If Resilient Mountings NAV1 to NAV5
are specified the rubber mountings must also remain in
compression The large metal washers must be fitted under
the studding nuts on each mounting. (See figure 4).
Other types of A.V. mounts - spring etc are also
designed to be used in compression only .
A suspended steel under frame would be necessary to
support the unit, (by others) standing on A.V. mountings.
Installation and MaintenanceAXUS C rcular B furcated Ax al Flow Fans
224. 10. 19. Leaflet Number 671221
Wiring connection diagrams; where a starter, frequency inverter
or Ecosmart control is used also refer to the relevant control
I&M instructions. Bifurcated fans should only be speed
controlled by a frequency inverter.
It is essential to note that for all three phase fans of 4KW and
above the final connection must be in DELTA.
If a Star/Delta starter is to be used connect all six motor
terminals to the appropriate terminals of the starter, if the fan
is to be started direct on line (DOL), to a frequency inverter or
Nuaire’s Ecosmart speed control the motor must be
connected in Delta.
U2
U1
(Not speed controllable)
230V 1 phase
50Hz supply
Motor
terminal
box
Single Speed 3 phase (below 4kW)
400V 3 phase
50HZ supply
400V 3 phase 50HZ supply
U1
V1
W1
W2
U2
V2
Incoming
Single
Phase
Supply
Incoming
Three Phase
Supply
3 phase for
STAR /DELTA STARTING
(4kW and above)
400V 3 phase 50Hz supply
STAR
L1 - U1
L2 - V1
L3 - W1
Link W2, U2, V2
DELTA
L1 - U1 - W2
L2 - V1 - U2
L3 - W1 - V2
U1
V1
W1
Motor
terminal
box
L
N
1U
1V
1W
2U
2V
2W
Motor
terminal
box
NOTE:
LOW SPEED -
Supply: 1U 1V 1W
HIGH SPEED -
Supply: 2U 2V 2W
& link 1U 1V 1W
2 SPEED TAP/ PAM WOUND
MOTOR (D.O.L. starting both speeds)
Note: individual wiring instructions
are included with each unit
Note:
For D.O.L (Direct On Line Starting) operation or
Inverter type Speed Control, wire in DELTA
3 phase for
U1
V1
W1
W2
U2
V2
DOL STARTING
(4kW and above) 400V
3 phase 50Hz supply
L1
L2
L3
Electrical Installation
Units are not supplied with electrical isolators, their selection
and provision is the responsibility of the installer.
Ensure the electrical supply is suitable for the fan and that all
wiring, fuse and overload protection etc is appropriately sized
by comparing with the rating plate.
Electrical connection is made direct to the motor termination
box on all fans, if explosion proof motors are fitted they will
require matched spec’ wiring, refer to data sheet 671216 for
additional advice.
Wiring Diagrams
Single Speed 1 phase
Wiring diagrams continued on page 3.
Shakeproof
washers.
Nuts used
for height
adjustment.
Supporting
Foot
Drop rods
(by others)
Supporting
foot
Fixings by
installer.
25mm dia essential
safety washer for
suspended
applications. (four
25mm washers
supplied with kit),
other fixings by
installer.
F gure 3. Res l ent Mount ng
‘Floor’ f x ng.
F gure 4. Res l ent Mount ng
‘Suspended’ f x ng.
AV Mounts isolate the fan only. Silencers/backdraught dampers
and other “significant mass” accessories should form part of the
fixed ductwork after the flexible connection.

Wiring Diagrams cont.
Installation and MaintenanceAXUS C rcular B furcated Ax al Flow Fans
L1 L/L2 N/L3 PE/ W V U
380V 3 phase 60Hz
400V 3 phase 60Hz
Connections
to motor
3 Phase input
Motor
3 phase
AXB units are suitable for
INVERTER SPEED CONTROL only
Notes:
Total length of motor leads should not exceed 50 metres.
If a screened motor cable is used, maximum length should
be 25 metres. Consult out Technical Department if you
wish to use longer leads.
Inverters are configured to suit specific fans and control
applications as described on the Customer Order
free of charge.
Matched Inverter Speed Control
324. 10. 19. Leaflet Number 671221
For spec al st connect ons not shown always refer
to the w r ng d agram suppl ed w th the un t. In the
event of query or uncerta nty contact NUAIRE
d rectly before any connect on s made.
Lubrication
Motors are f tted w th sealed for l fe bear ngs and do not
requ re any lubr cat on.
Impellers
Impellers are dynam cally balanced dur ng manufacture, no
spec al treatment s requ red dur ng ma ntenance, other to clean
and remove all dust and d rt res due tak ng care not to d sturb
the balance we ghts. Remove stubborn d rt w th warm soapy
water – do not use caust c flu ds.
If ATEX compliant, observe the advice of guidance no te
document 671216.
The ma ntenance programme must conform to ‘good
custom and pract ce’ and to the publ shed recommendat ons
of assoc at ons such as the HVCA, CIBSE etc. The HVCA’s
publ cat on ‘Standard Ma ntenance Spec f cat on for Mechan cal
Serv ces n Bu ld ngs’ Vol 2 Vent lat ng and A r Cond t on ng s
a recommended reference.
Replacement of Parts
Should any component need replac ng Nua re keep extens ve
stocks for qu ck del very. Ensure that the un t s electr cally
solated, before carry ng out any work.
When order ng spare parts, please quote the ser al number
of the un t and the ARC number of the purchase f poss ble
(this information will be available on the fan label).
Warranty
The 3 year warranty starts from the day of delivery and
includes parts and labour for the first year. The remaining
period covers replacement parts only.
This warranty is void if the equipment is modified without
authorisation, is incorrectly applied, misused, disassembled, or
not installed, commissioned and maintained in accordance with
the details contained in this manual and general good practice.
The product warranty applies to the UK mainland and in
accordance with Clause 14 of our Conditions of Sale. Customers
purchasing from outside of the UK should contact Nuaire
International Sales office for further details.
After Sales
For technical assistance or further product information, including
spare parts and replacement components, please contact the
After Sales Department.
Telephone [phone]
Isolation - Before removing panels
make sure that the unit is electrically
isolated from the mains supply.
Setting to Work
Ensure all mechan cal and electr cal connect ons and fx ngs are
secure and that nlet and outlet duct work s free of any
obstruct on or debr s. Br efly sw tch the fan on/off to ascerta n
correct d rect on of rotat on, compare the rotat onal label appl ed
to the fan case and correct f necessary.
Maintenance
Only appropr ately qual f ed personnel, fam l ar not only w th
the electr cal aspect of the work but w th the plant, area or
appl cat on served by the un t, should carry out rout ne and
preventat ve ma ntenance on th s product.
Maintenance Intervals
Ma ntenance should be carr ed out on a regular bas s, we
recommend three months from comm ss on ng and at least
annually thereafter as determ ned by the operat ng cond t ons
and levels of a rborne contam nat on to wh ch the un t s
exposed.
Maintenance Checklist 4
Item Tick
Check that bird guards/safety grilles are secure
and free of obstruction.
Inspect all bolts, fixings and electrical
terminals for security .
Check motor for undue wear , signs of over heating
and apply winding insulation and continuity tests.
Remove all dust and dirt from impellers, be
especially careful not to disturb balance weights.
Generally clean.
Check resilient mounts and replace any that
show signs of wear or de ter ior ation.

424. 10. 19. Leaflet Number 671221
Techn cal or commerc al cons derat ons may, from t me to t me, make t necessary to alter the des gn, performance and
d mens ons of equ pment and the r ght s reserved to make such changes w thout pr or not ce.
DECLARATION OF INCORPORATION AND INFORMATION FOR SAFE INSTALLATION,
OPERATION AND MAINTENANCE
To comply with EC Council Directives 2006/42/EC Machinery Directive and
2014/30/EC (EMC).
To be read in conjunction with the relevant Product Documentation (see 2.
1.0 GENERAL
1.1 The equipment referred to in this Declar ation of Incorporation is supplied by
Nuaire to be assembled into a ventilation system which may or may not
include additional components.
The entire system must be considered for safety purposes and it is the
responsibility of the installer to ensure that all of the equipment is installed in
compliance with the manufacturers recommendations and with due regard to
current legislation and codes of practice.
2.0 INFORMATION SUPPLIED WITH THE EQUIPMENT
2.1 Each item of equipment is supplied with a set of documentation which provides
the information required for the safe installation and maintenance of the
equipment. This may be in the form of a Data sheet and/or Installation and
Maintenance instruction.
2.2 Each unit has a rating plate attached to its outer casing. The rating plate
provides essential data relating to the equipment such as serial number, unit
code and electrical data. Any further data that may be required will be found
in the documentation. If any item is unclear or more information is required,
contact Nuaire.
2.3 Where warning labels or notices are attached to the unit the instructions given
must be adhered to.
3.0 TRANSPOR TATION, HANDLING AND S TORAGE
3.1 Care must be taken at all times to prevent damage to the equipment. Note that
shock to the unit may result in the balance of the impeller being affected.
3.2 When handling the equipment, care should be taken with corners and edges and
that the weight distribution within the unit is considered. Lifting gear such as
slings or ropes must be arranged so as not to bear on the casing.
3.3 Equipment stored on site prior to installation should be protected from
the weather and steps taken to prevent ingress of contaminants.
4.0 OPERATIONAL LIMITS
4.1 It is important that the specified operational limits for the equipment are
adhered to e.g. operational air temperature, air borne contaminants and unit
orientation.
4.2 Where installation accessories are supplied with the specified equipment eg.
wall mounting brackets. They are to be used to support the equipment only.
Other system components must have separate provision for support.
4.3 Flanges and connection spigots are provided for the purpose of joining to
duct work systems. They must not be used to support the ductwork.
5.0 INSTALLATION REQUIREMENTS
5.1
In addition to the particular requirements given for the individual product, the
following general requirements should be noted.
Where access to any part of equipment which moves , or can become electrically
live are not prevented by the equipment panels or by fixed installation detail
(eg ducting), then guarding to the appropriate standard must be fitted.
5.2 The electrical installation of the equipment must comply with the requirements
of the relevant local electrical safety regulations.
5.3 For EMC all control and sensor cables should not be placed within 50mm or on
the same metal cable tray as 230V switched live, lighting or power cables and
any cables not intended for use with this product.
6.0 COMMISSIONING REQUIREMENTS
6.1 General pre-commissioning checks relevant to safe operation consist of
the following:
Ensure that no foreign bodies are present within the fan or casing. Check
electrical safety. e.g. Insulation and earthing.
Check guarding of system.
Check operation of Isolators/Controls.
Check fastenings for security.
6.2 Other commissioning requirements are given in the relevant product
documentation.
7.0 OPERATIONAL REQUIREMENTS
7.1 Equipment access panels must be in place at all times during operation of the
unit, and must be secured with the original fastenings.
7.2 If failure of the equipment occurs or is suspected then it should be taken out of
service until a competent person can effect repair or examination. (Note that
certain ranges of equipment are designed to detect and compensate for fan
failure).
8.0 MAINTENANCE REQUIREMENTS
8.1 Specific maintenance requirements are given in the relevant product
documentation.
8.2 It is important that the correct tools are used for the various tasks required.
8.3 If the access panels are to be removed for any reason the electrical supply to the
unit must be isolated.
8.4 A minium period of two minutes should be allowed after electrical disconnection
before access panels are removed. This will allow the impeller to come to rest.
NB: Care should still be taken however since air flow generat ed at some
other point in the system can cause the impeller to “windmill” even when
power is not pr esent.
8.5 Care should be taken when removing and storing access panels in windy
conditions.
INFORMATION FOR SAFE INSTALLATION, OPERATION AND MAINTENANCE
OF NUAIRE VENTILATION EQUIPMENT
We declare that the machinery named below is intended to be assembled
with other components to constitute a system of machinery. The machinery
shall not be put into service until the system has been declared to be in
conformity with the provisions of the EC Machinery Directive.
AXUS BIFURCATED FAN
Designation of machinery :
Machinery Types: AXB
Relevant EC Council Directives: 2006/42/EC (Mach nery D rect ve)
BS EN ISO 12100-1, BS EN ISO 12100-2,
EN294, EN60204-1, BS EN ISO 9001
Applied Harmonised Standards:
Applied National Standar ds: BS848 Parts One, Two and F ve
Signature of manufacture representatives:
Name: Pos t on: Date:
1) C. B ggs Techn cal D rector 20. 07. 07
2) A. Jones Manufactur ng D rector 20. 07. 07