NuAire AXUS SWIFT Series Instruction Manual

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nuaire.co.uk 029 2085 8400 08. 11. 17. Leaflet Number 671645
The EMC Directive
2014/30/EU
The Low Voltage
Directive
2014/35/EU
AXS
AXUS Swift Circular Long Cased Axial Flow Fans
Installation and Maintenance
1.0 Introduction
The AXUS SWIFT range of axial flow fans are designed for ‘in duct’
applications. Manufactured from galvanised steel, the units are
suitable for indoor or outdoor installation and at any installed
angle.
Available for single and three phase supplies.
Case diameters of 350mm to 1000mm.
Unit codes AXS350 to AXS1000.
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 the Nuaire product catalogue. A comprehensive range of
ancillaries and silencers are also listed.
3.0 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 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 materials, 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.
2.0 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. Check the weight on the rating plate details before attempting to
lift and always use a spreader as shown (fig. 1), never pass lifting slings
through the impeller (fig. 2).
3.1 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.
Figure 1. Correct method of
lifting using a spreader.
Figure 2. The wrong method of
lifting with sling through impeller
can cause case distortion.
3.2 Horizontal on Floor or Supported from Wall etc.
Optional resilient mountings should be attached to the unit mounting
brackets at this stage (fig. 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.

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nuaire.co.uk 029 2085 8400 08. 11. 17. Leaflet Number 671645
Installation and Maintenance AXUS Swift Circular Long Cased Axial Flow Fans
Figure 3. Resilient Mounting
‘Floor’ fixing.
Figure 4. Resilient Mounting
‘Suspended’ fixing.
Supporting
foot.
Shakeproof
washers.
Fixings by
installer.
Supporting
foot
25mm dia
essential safety
washer for
suspended
applications (four
25mm washers
supplied with
kit), other fixings
by installer.
Drop rods
(by others).
Nuts used
for height
adjustment.
IMPORTANT
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.
IMPORTANT
For good EMC engineering practice, any sensor cables
or switched live cables should not be placed within
50mm of other cables or on the same metal cable tray
as other cables.
IMPORTANT
An inverter is used to provide speed control. When the
fan is isolated, allow 5 minutes for the capacitors in the
inverter to discharge before commencing any work on
the unit.
3.3 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 (fig. 4).
Other types of A.V. mounts - spring etc. are also designed to be
used in compression only.
A suspended steel underframe would be necessary to support the unit,
(by others) standing on A.V. mountings.
3.4 Ecosmart Control Installation (optional)
The controller must be fitted indoors (an optional outdoor cover can be
purchased) and away from water spray and heat source.
The operating range is -10°C to 35°C up to 85% relative humidity.
The controller must be fitted to a vertical vibration free wall with
appropriate fasteners and for ease of installation the cover should be
removed and the casing separated from the base. If cooling fans are
fitted they should be disconnected while installation takes place.
The cable connecting the Ecosmart control and the fan must be a
screened power cable, not exceeding 30 metres.
The screening must be earthed at both ends using the special cable
glands supplied.
Bridge any break in the screening (e.g. at local isolators) using braided
earthing strap.
(Details of Ecosmart controls and wiring connections can be found
on pages 4, 5 and 6).
3.5 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
specified wiring; refer to data sheet 671216 for additional advice.
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.
If T1/ T2 are located in the fan terminal block, this is the motor overheat
protection device which is Thermistors or Thermostat as specified.

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nuaire.co.uk 029 2085 8400 08. 11. 17. Leaflet Number 671645
Installation and Maintenance AXUS Swift Circular Long Cased Axial Flow Fans
4.0 Electrical Wiring
4.1 Single Phase Units
4.2 Three Phase Units
Single Speed, 1 phase
D.O.L. Starting, 3 phase (3kW and below) Single Speed, 3 phase
Speed Control - TRANSFORMER, 1 phase
Speed Control - ELECTRONIC, 3 phaseStar / Delta Starter, 3 phase (4kW and above)
IMPORTANT
For specialist connections not shown always refer
to the wiring diagram supplied with the unit. In
the event of query or uncertainty contact NUAIRE
directly before any connection is made.
X L N
Fan
Unit
NOTE:
Remove Link between
X+L when using
speed control
L N
230V 1 phase 50Hz supply
220V 1 phase 60Hz supply
N L X
Fan
unit
L N
230V 1 phase 50Hz supply only
L1N L2 N N L
Control
SPCON
460V 3 phase 60Hz supply
380V 3 phase 60Hz supply
400V 3 phase 50Hz supply
L1
L2
L3
STAR
L1 - U1
L2 - V1
L3 - W1
Link W2, U2, V2
U1
V1
W1
W2
U2
V2
L1 L2 L3
400V 3 phase 50Hz supply
380V 3 phase 60Hz supply
460V 3 phase 60Hz supply
Fan
unit
U1
V1
W1
W2
U2
V2
DELTA
L1 - U1 - W2
L2 - V1 - U2
L3 - W1 - V2
Note:
For all D.O.L. (Direct On Line)
operation or Inverter type Speed Control
wire in DELTA
460V 3 phase 60Hz supply
380V 3 phase 60Hz supply
400V 3 phase 50Hz supply
L1 L2 L3
L1 PE/ N/L3 L/L2 W U V
400V 3 phase 50Hz supply
380V 3 phase 60Hz supply
460V 3 phase 60Hz supply
3 Phase only
INVERTER SPEED CONTROL
Connections
to motor
3 Phase input
Motor
3 Phase
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 our Technical Department if you
wish to use longer leads.
Inverters are configured to suit specific fans and control
applictions as described on the Customer Order
free of charge.

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nuaire.co.uk 029 2085 8400 08. 11. 17. Leaflet Number 671645
Installation and Maintenance AXUS Swift Circular Long Cased Axial Flow Fans
Sections 4.3, 4.4 & 5 are applicable to
Ecosmart Control option only.
4.3 Electrical Wiring - Ecosmart Control
The mains power supply to the controller must be appropriately sized
and installed via a local isolation switch (by others). The isolator must
also accommodate the 230V switched live (if used).
The mains supply from the Ecosmart controller to the fan must be
appropriately sized, not exceeding 30 metres and must be a screened
power cable, earthed at both ends. A four point gland plate is formed
from the base of the control and in order to maintain EMC compliance,
an EMC glanding kit is supplied.
Ecosmart controls and sensors are supplied with 10 metres of data
cable plugged at both ends, if used these can now be fitted and plugged
in to the low voltage sockets on the Ecosmart control board. All other
low voltage connections i.e. BMS can also be completed.
N
L
SL
Remove this link wire if:
1. a switched live signal is connected.
2. A ES-PIR, ES-TC or BMS signal
is connected.
Max SL run onMin
Trickle Test
10
Pwr
Standby
Fan 1
Fan 2
Heating
Cooling
Fault
Frost
Tx
Rx
Ecosmart
Earth
DAMPER
FAULT RUN
E L3 N L2 L1
E N L1 L2 L3
Mains supply connections
400V 50Hz 3ph + Neutral
via local isolator
1 3 5
2 4 6
(U) (V) (W)
CONTACTER
A1
A2
0V
0-10V
BMS signal
'NET' connection
U V W E
DP
CL
Connections to fan via screened
power cable. Purpose made glands
are provided to earth the screening
N
RET
Note: Internal connections
between the supply
terminals, output
contactors the PCB and
inverter are made at
the factory
IMPORTANT
Motors of 4kW and
above must be
connected to Delta
IMPORTANT
The screening of the power cable must be continuous. Bridge any breaks (e.g. at local isolators)
using braided earthing cable. Ensure the screening is earthed at both ends.
IMPORTANT
To minimise the possibility of Electro Magnetic
Interference:
• Always install screened cable between the control
and the fan, maximum length 30 metres. Please consult
Nuaire if a longer cable run is needed.
• This product must be earthed and always ‘earth’ the
screened cable at both ends. Ensure that ALL earth
connections are the same potential. Cable glands are
provided.
• Always keep mains supply cables and motor supply
cables separate and DO NOT install any data cable or
low voltage cable in the same containment as mains
carrying cables.
Figure 5. Resilient Mounting ‘Suspended’ fixing.

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nuaire.co.uk 029 2085 8400 08. 11. 17. Leaflet Number 671645
Installation and Maintenance AXUS Swift Circular Long Cased Axial Flow Fans
4.4 Control Connections
4.4.1 Mains Connections
Mains cables should be suitably sized and terminated at terminals
shown on the appropriate diagram.
4.4.2 Control Connections
4.4.3 Switched Live (SL) terminal at the PCB
4.4.4 Damper Connections
OP - 230V 50Hz 1A max supply to open the damper.
CL - 230V 50Hz 1A max supply to close the damper.
N - Neutral supply to damper.
RET - 230V ac return signal from the damper limit switch indicates the
damper has reached its operating position. If the return signal is not
present, the fan will wait for 1 minute before starting.
Note: If a damper is not fitted, connect a link wire from OP to RET. This
will cancel the delay.
4.4.5 Volt Free Relay Contacts
4.4.6 Data Cable Installation
A 4-core SELV data cable is used to connect devices.
Do not run data cable in the same conduit as the mains cables and
ensure there is a 50mm separation between the data cable and other
cables. The maximum cable run between any two devices is 300m
when it is installed in accordance with the instructions.
Please note that the total data cable length used in any system must
be less than 1000m. Keep the number of cable joints to a minimum to
ensure the best data transmission efficiency between devices.
4.4.7 Maximum Number Of Devices
The maximum number of devices (including fans) that can be
connected together via the cable is 32, irrespective of their functions.
4.4.8 Other Low Voltage Cables e.g. BMS Signal
Follow the basic principle (as per section 4.4.6). Keep the cable run as
short as possible, maximum cable length of 50m. If the cable is longer
than 12m, Nuaire recommend using screened cable with the screening
grounded at one end only (preferably at the inverter end).
4.4.9 Other Low Voltage Cables e.g. BMS Signal
Follow the basic principle (as per section 4.4.6). Keep the cable run as
short as possible, maximum cable length of 50m. If the cable is longer
than 12m, Nuaire recommend using screened cable with the screening
grounded at one end only (preferably at the inverter end).
4.4.10 BMS Input Signals
The BMS connection is made with a plug-in connector
via the socket (see fig. 11).
To ensure the connection is made only by suitably
qualified and authorised personnel the plug is not
supplied.
It is available from R S Components,
Part No. 403-875 or Farnell, Part No. 963-021.
The system’s response to a 0-10V dc BMS signal is given in the
following table.
Note:
The BMS signal will override any sensors and user control connected in
the system. The voltage tolerance is +/- 125mV and is measured at the
fans terminal.
IMPORTANT
Reversal of the BMS connection will damage the
control.
Mains Connection
230V 50Hz 1 phase
N E L SL
Remove link if switched live signal,
an enabler or BMS signal is connected.
All wiring is 1Ph 230V 50Hz
230V
motor
S4
2
S6
1
RETOP CL N
All wiring is 1Ph 230V 50Hz
230V
motor
RETN CL OP
White Brown Blue
A fan starting
delay of 1 minute
is imposed to
enable the damper
to open.
To override the
delay, fit a link here
A fan starting
delay of 1 minute
is imposed to
enable the damper
to open.
To override the
delay, fit a link here
Fault Signal
FAULT
Run Signal
RUN
0V 0 - 10V
BMS
Figure 6. ‘Net’
connection
for Ecosmart
devices.
Figure 7.
Net - The 4 IDC plug-in connectors are provided for the connection of
compatible sensors, manual controls and for linking the fans together
under a common control. If more than 4 connections are required,
the junction box (product code ES-JB) should be used (data cable
installation).
A signal of 100-230V a.c. will activate the fan from either its off state
or trickle state (see setting to work-trickle switch). When the SL is
disconnected the fan will over-run for 1 – 60 minutes (see fig. 12).
Do not take this signal from an isolating transformer.
Figure 8. Drive
Open / Spring close.
Figure 9. Drive
Open / Drive Close
Figure 10.
Note that the volt free contacts are not fused. If these are used to
power any external equipment, the installer must provide adequate
fusing or other protections.
These contacts are rated at 5A resistive, 0.5A inductive.
Run connections - These contacts are closed when the fan is running.
Fault connections - No fault = the contacts are closed.
Fault = the contacts are opened.
Figure 11.

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nuaire.co.uk 029 2085 8400 08. 11. 17. Leaflet Number 671645
Installation and Maintenance AXUS Swift Circular Long Cased Axial Flow Fans
5.0 Setting To Work
IMPORTANT
Isolation - Before commencing work, make sure
that the unit, switched live and Nuaire controls are
electrically isolated from the mains supply.
Warning - Inverter Speed Control
An inverter is used to provide speed control. When the
fan is isolated, allow 5 minutes for the capacitors in the
inverter to discharge before commencing any work on
the unit.
IMPORTANT
Isolation - Before commencing work, make sure that the
unit, switched live and Nuaire controls are electrically
isolated from the mains supply.
Note that the volt free contacts are not fused. If these are used to
power any external equipment, the installer must provide adequate
fusing or other protections.
5.1 Electrical
5.1.1 Using The Test Button
The test button allows the blower within the unit to be checked for its
operation. If the fan is running already, press the button once to stop
the fan, press again to switch on the fan.
Note that the fan will return to normal operation after 30 seconds.
5.3 Settings
5.3.1 Setting The Maximum Airflow rate
•Ensure the power supply is switched off and that a link wire is
connected from the supply L to the SL terminal. Unplug all items
connected to the ‘Net‘ connectors.
•Switch on the power supply.
•Wait for the fan to reach steady condition.
Measure the airflow using standard commissioning instruments at
a suitable point in the ductwork.
If adjustment is required, rotate the pot marked ‘MAX’ to obtain
the desired airflow. Remove the link wire if not required (fig. 7).
5.3.2 Setting The Minimum / Trickle Airflow Rate (Nomial 20%)
•Repeat the same procedure as for maximum airflow above but
without the link wire between supply L and SL terminal. Ensure the
trickle switch is in the ‘ON’ position. Adjustment must be made on
the pot marked ‘Min’.
•Note that the minimum setting (nominally 20%) must be
below the maximum setting; otherwise minimum setting will be
automatically set to be the same as the maximum.
•The minimum speed set is the trickle speed at which the fan
operates.
Note: The working speed range of the user control and sensors is
between the minimum and maximum set points.
5.2 LED Indication
PWR GREEN: Power on & OK.
Standby LED on when fan is not running.
Fan 1 GREEN: Fan 1 is running, RED: Fan 1 faulty.
Fan 2 GREEN: Fan 2 is running, RED: Fan 2 faulty.
Heating* Not applicable, see note.
Cooling* Not applicable, see note.
Fault LED on when a fault is present on unit.
Frost* Not applicable, see note.
Tx LED on when the controller is transmitting data.
Rx LED on when the controller is receiving data.
* Note that the control panel is common to all the Ecosmart
products and will have indicators for functions that are not
available in this particular fan. However these indicators will not be
illuminated.
Min = Minimum speed adjustment
Max = Maximum speed adjustment
SL runon = Switched live run-on
timer adjustment
Trickle = Selects trickle running:
0 = off, 1 = selected
Test = Test button
Max SL runon Min
Trickle Test
10
Pwr
Standby
Fan 1
Fan 2
Heating
Cooling
Fault
Frost
Tx
Rx
Ecosmart
Connector
LED indicators
Figure 12.
Ventilation Mode
Local Control 0.00
OFF/ Trickle 0.25
Speed 1 0.50
Speed 2 1.50
Speed 3 2.50
Speed 4 3.50
Speed 5 4.50
Speed 6 5.50
Speed 7 6.50
Speed 8 7.50
Speed 9 8.50
Speed 10 9.50

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nuaire.co.uk 029 2085 8400 08. 11. 17. Leaflet Number 671645
Installation and Maintenance AXUS Swift Circular Long Cased Axial Flow Fans
IMPORTANT
Isolation - Before commencing work, make sure that the
unit, switched live and Nuaire controls are electrically
isolated from the mains supply.
6.0 Maintenance
Only appropriately qualified personnel, familiar not only with the
electrical aspect of the work but with the plant, area or application
served by the unit, should carry out routine and preventative
maintenance on this product.
Ensure all mechanical and electrical connections and fixings are secure
and that inlet and outlet duct work is free of any obstruction or debris.
Briefly switch the fan on/off to ascertain correct direction of rotation,
compare the rotational label applied to the fan case and correct if
necessary.
7.0 Replacement Of Parts
Should any component need replacing, Nuaire keep extensive stocks
for quick delivery. Ensure that the unit is electrically isolated, before
carrying out any work.
When ordering spare parts, please quote the serial number of the unit
and the ARC number of the purchase; if possible (This information will
be available on the fan label).
8.0 Warranty
Axus AX units have a 3 year warranty. Units with Ecosmart control have
a 5 year warranty. The 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.
9.0 After Sales
For technical assistance or further product information, including spare
parts and replacement components, please contact the After Sales
Department.
6.1 Maintenance Intervals
Maintenance should be carried out on a regular basis, Nuaire
recommend three months from commissioning and at least annually
thereafter as determined by the operating conditions and levels of
airborne contamination to which the unit is exposed.
6.2 Maintenance Check List a
6.3 Lubrication
Motors are fitted with sealed for life bearings and do not require any
lubrication.
6.4 Impellers
Impellers are dynamically balanced during manufacture, no special
treatment is required during maintenance, other to clean and remove
all dust and dirt residue taking care not to disturb the balance weights.
Remove stubborn dirt with warm soapy water – do not use caustic
fluids.
If an ATEX compliant unit, observe the advice of the guidance notes
in document 671216.
The maintenance programme must conform to ‘good custom and
practice’ and to the published recommendations of associations such
as the HVCA, CIBSE etc. The HVCA’s publication ‘Standard Maintenance
Specification for Mechanical Services in Buildings’ Vol 2 Ventilating and
Air Conditioning is a recommended reference.
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 overheating
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 deterioration.
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