NuAire AX Series User manual

04. 02. 20. Document Number 671847 1 Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
LVD Directive
2014/35/EU
AX
Long Cased Axial Fans
High Pressure Ambient & High Temperature 300°C / 400°C for 2 hours
Installation Manual
EMC Directive
2014/30/EU
1.1 Hazard Symbols
GENERAL WARNING
Signifies a general warning regarding hazard specified by supplementary information.
ELECTRIC SHOCK
This unit must be completely electrically isolated before any panels are removed. Check
mains supply and control connections.
ROTATING PARTS
This unit contains fast moving rotational parts which may start automatically. It is the
sole responsibility of the installer to adequately guard these components.
REFER TO INSTRUCTION MANUAL
Read and understand the installation and maintenance manual before installing,
operating or maintaining this product.
1.0 SAFETY INFORMATION
• The provision of the electrical supply and the connection of the unit to the mains must be
carried out by a qualified electrician.
• Isolate from power supply before removing any covers. During installation / maintenance ensure
all covers are fitted before switching on the mains supply.
• All-pole disconnection from the mains as shown in the wiring diagram must be incorporated
within the fixed wiring and shall have a minimum contact separation of 3mm in accordance with
latest edition of the wiring regulations.
• This unit must be earthed.
• Ducting must be securely fixed with screws to the spigot to prevent access to live parts. Duct
runs terminating close to the fan must be adequately protected by suitable guards.
• If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or
similarly qualified persons in order to avoid a hazard.
• Precautions must be taken to avoid the back-flow of gases into the room from the open flue of
gas or other fuel-burning appliances.
• This appliance should not be used by children or persons with reduced physical, sensory or
mental capabilities or lack of experience and knowledge, unless they have been given supervision
or instruction concerning the safe use of the appliance by a person responsible for their safety.
Children shall not play with the appliance. Cleaning and user maintenance shall not be carried
out by children.

04. 02. 20. Document Number 671847 2 Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
AX
Installation Manual
1.2 Important Information
This manual contains important information on the safe and
appropriate assembly, transport, commissioning, operation,
maintenance, disassembly and simple troubleshooting of the product.
While the product has been manufactured according to the accepted
rules of current technology, there is still a danger of personal injury or
damage to equipment if the following general safety instructions and
the warnings contained in these instructions are not complied with.
•Read these instructions completely and thoroughly before
working with the product.
•Keep these instructions in a location where they are accessible
to all users at all times.
•Always include the operating instructions when you pass the
product on to third parties.
1.3 Personal Protective Equipment
The following minimum Personal Protective Equipment (PPE) is
recommended when interacting with Nuaire product:
•Protective Steel Toed Shoes - when handling heavy objects.
•Full Finger Gloves (Marigold PU800 or equivalent) - when
handling sheet metal components.
•Semi Fingerless Gloves (Marigold PU3000 3DO or equivalent)
- when conducting light work on the unit requiring tactile
dexterity.
•Safety Glasses - when conducting any cleaning/cutting operation
or exchanging filters.
•Reusable Half Mask Respirators - when replacing filters which
have been in contact with normal room or environmental air.
Nuaire would always recommend a site specific risk assessment by a
competent person to determine if any additional PPE is required.
2.0 INTRODUCTION
The AXUS high pressure range of axial flow fans are designed for ‘in
duct’ applications. Manufactured from mild steel then galvanised,
making the unit suitable for indoor and outdoor applications.
These units are available for selection in 3 variants. For temperature
rating please refer to the product rating label.
•Ambient (day to day use).
•F300 (day to day use, with one off emergency smoke extraction
300°C for 120min).
•F400 (day to day use, with one off emergency smoke extraction
400°C for 120min).
Case diameters of 630mm to 900mm.
Unit codes AX63 to AX90.
Impellers have been selected at blade angle settings matched to
various motor speeds to perform against the design criteria laid down
in Nuaire's selection catalogue / software.
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.
2.1 Code Description:
AX 80 LQ - 2 1 S 8 + 2R
| | | | | | | | | |
1 2 3 4 5 6 7 8 9 10
1. Range: Long Case Axial Fans
2. Impeller Size (cm): 31 to 160
3. Impeller Reference: Contact Nuaire
4. Guide Vanes: *= Guide Vanes
-= No Guide Vanes
5. Motor Poles: 2, 4, 6 or 8
6. Blade Angle Reference: Contact Nuaire
7. Impeller Material: A= Aluminium
S= Steel
8. Motor Type: 7= Three Phase 300°C/2hr
8 = Three Phase 400°C/2hr
9. Speed Control: += Must Be VSD Controlled
- = No Speed Control
10. Further Options: Contact Nuaire
3.0 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 any
lift. Always use a spreader as shown (Figure 1), or a suitable forklift, if
forklift access points are provided within the mounting feet. Never pass
lifting slings through the impeller.
4.0 MECHANICAL 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 e.g. IEE,
CIBSE, HVCA, ATEX, BSI & EN standards etc.
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.
1 Correct and Incorrect Lifting
IMPORTANT
The units are designed to be supported by the mounting
bracket, in a horizontal orientation. For any other
mounting orientation please contact Nuaire.

04. 02. 20. Document Number 671847 3 Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
AX
Installation Manual
Bolt used for
height
adjustment
Supporting
foot
Shakeproof
washers
Locking
Nut
2 Resilient Floor Mounted Fixing
4.1 General
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 mounting brackets are fitted for horizontal application.
For other orientations please contact Nuaire for advice.
•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.
4.2 Floor Mounting
Optional resilient mountings should be attached to the unit mounting
brackets at this stage (Figure 3). 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.
4.3 Suspended Mounting (Horizontal or Vertical)
Anti-Vibration (A.V.) mounts must be arranged so that they are used in
compression only.
A suspended steel under frame would be necessary to support the unit,
(by others) standing on A.V. mounts.
5.0 ELECTRICAL INSTALLATION
5.1 Motors
Motors are totally enclosed and protected to IP55 (Dust and low
pressure water jets). Motors comply with BS5000, EN600034 and
IEC34-1. The motors have sealed for life ball bearings in units up to
132mm frame size. Frame sizes 160mm and above are re-greaseable
type.
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
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 within 50mm of other cables or on
the same metal cable tray as other cables.
Enclosures are to IP55 with class F/H insulation dependant on motor
temperature rating.
N.B. Please note that the requirements for maintenance of the motor.
Failure to comply with the recommendations will invalidate any
warranty claim.
High Temperature unit motors are tested in accordance with
EN12101-3.
5.2 Electrical Connections
Check that the voltage full load and starting current on the fan rating
label is suitable for your supply.
Units for external use require weatherproof conduit and glands.
Single speed motors below 4kW
Single speed motors below 4kW are suitable for Direct On Line starting
only.
Single speed motors 4kW and above
Single speed motors 4kW and above are supplied with Star/Delta
capability but Direct On Line starting is recommended as the simplest
means for emergency equipment operation.
Two speed motors
Two speed motors are supplied TAP or PAM single winding or Dual
Wound. All two speed types are designed for Direct On-Line starting on
both speeds only unless otherwise specified.
5.3 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 approximately 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.
IMPORTANT
Inverter Control - High Temperature Applications
Under fire conditions the electrical supply must not
run through the inverter - THE INVERTER MUST BE
BYPASSED.

04. 02. 20. Document Number 671847 4 Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
AX
Installation Manual
5.4 Wiring
5.4.1 D.O.L. Starting - 3 Phase (3kW and below)
5.4.2 Star / Delta - 3 Phase (4kW and above)
5.4.4 Two Speed - DUAL WOUND MOTOR D.O.L. Starting
(Both Speeds) -3 phase
5.4.6 Speed Control - ELECTRONIC, 3 phase
5.4.3 Two Speed - TAP/PAM WOUND MOTOR D.O.L. Starting
(Both Speeds) - 3 phase
5.4.5 Contactor control - Two Speed Motors - 3 phase
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
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
Low
Speed
High
Speed
L3
L1
L2
L3
460V 3 phase 60Hz supply
380V 3 phase 60Hz supply
400V 3 phase 50Hz supply
1U
1V
1W
2U
2V
2W
Motor
terminal
box
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.
1U
1V
1W
2U
2V
2W
Motor
terminal
box NOTE
HIGH SPEED
Supply: 2U 2V 2W
LINK: 1U 1V 1W
LOW SPEED
Supply: 1U 1V 1W
Note: individual
wiring instructions
are included with
each unit
460V 3 phase 60Hz supply
380V 3 phase 60Hz supply
400V 3 phase 50Hz supply
AI
A2
E
1 3 5
L1 L2 L3
1U 1V 1W
2U 2V 2W
2 4 6
AI
A2
1 3 5
2 4 6
AI
A2
1 3 5
2 4 6
For low speed connect
Contactor C1
For high speed connect
Contactor C2 and C3
Motor Terminal Box
Note: High Speed -
Supply: 2U 2V 2W
Link: 1U 1V 1W
Low Speed -
Supply: 1U 1V 1W
C1 C2 C3
400V 3 phase 50Hz supply
380V 3 phase 60Hz supply
460V 3 phase 60Hz supply
3
4
5
6
8
7
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.
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.

04. 02. 20. Document Number 671847 5 Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
AX
Installation Manual
IMPORTANT
Isolation - Before commencing work, make sure
that the unit, switched live and Nuaire controls are
electrically isolated from the mains supply.
6.0 SPECIFIC COMMISSIONING AND SERVICING
REQUIREMENTS
300°C for 2 hours / 400°C for 2 hours Motors for Smoke
Extract Fans
Motors for Smoke Extract Fans
These motors are used to provide a SAFETY FUNCTION for people
in the event of fire in public premises or in the home: they are
therefore subject to strict constraints concerning their operating and
maintenance.
Operating Constraints
i. Check on the nameplate that the selected motor corresponds to the
maximum exposure temperature and duration.
ii. Non ventilated motors MUST be placed in the airflow from the driven
fan. Ventilated motors can be placed outside the flow.
iii. AFTER THE MOTOR HAS BEEN SUBJECTED TO ONE EMERGENCY
DUTY OPERATION, IT MUST BE REPLACED.
iv. With variable speed control. Ensure that the maximum speed never
exceeds the speed of the motor supplied by the mains and that the
delivered power corresponds to the previous definitions. The motor
should be equipped with PTC thermistors connected to the protection
system during S1 duty and switched off during S2 duty (operation
during an emergency).
These qualifications ensure the qualification of the driven fan by the
manufacturer.
Maintenance Constraints
Regular service visits must be performed on the installation AT
LEAST EVERY 6 MONTHS, incorporating the following checks:
i. Checking the insulation resistance (R>100 MOhms, 500V DC)
•If the drain holes are blocked, open them to eliminate any
accumulated condensation.
•If R<100 MOhms, dry the stator in an oven and check the
insulation resistance. If the fault persists, replace the stator.
•The stator must be replaced 5 years after installation or after
20,000 hours of operation.
ii. Cooling check
•Ensure there is no dust or grease in the entire ventilation circuit
(housing fins, motor cover/fan if fitted driven fan).
•Ensure the motor runs normally when switched on for a few
minutes.
iii. Bearing check (C3 or C4 play)
Run the motor during each maintenance visit. When the motor is cold,
a high level of noise is caused by the texture of the grease. This does not
indicate a bearing fault.
S2 duty only:
The bearings must be replaced by an identical type every 5 years.
Ensure the motor runs normally when switched on for a few minutes.
S1 duty and Emergency in S2 duty:
a) Permanently greased bearings.
300°C / 400°C range; replace on 2 pole motors after 10,000 hours of
operation and on motors with 4 poles or more after 20,000 hours.
b) Re-greaseable bearings
The information on the motor nameplates must be strictly respected
(grease quantity, grease quality and re-greasing frequency).
The bearings must be replaced after 20,000 hours of operation.
7.0 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.
It is important that maintenance checks are recorded and that the
schedule is always adhered to, in all cases, the previous report should
be referred to.
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.
7.1 Routine Maintenance
•Clean all areas of unit and treat any areas of corrosion.
•Check that bird guards/safety grilles are secure and free of
obstruction.
•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.
•Check resilient mounts and replace any that show signs of wear or
deterioration.
7.2 Annually
•Thoroughly inspect the unit and its components for corrosion,
acting immediately to treat/restore any damaged areas.
•All electrical terminals within the unit should be tightened.
•Check all earth connections.
7.3 Bearing Lubrication
Motors are fitted with sealed for life bearings and do not require any
lubrication.
7.4 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.
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.

04. 02. 20. Document Number 671847 6 Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
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Installation Manual
7.5 Motor Repair
Due to unit certification EN12101-3 and in compliance with the
construction products directive, the motor must be returned to the
motor manufacturer for replacement.
8.0 WARRANTY
The 5 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.
Failure to maintain the unit as recommended will invalidate the
warranty.
9.0 END-OF-LIFE AND RECYCLING
Where possible Nuaire use components which can be largely recycled
when the product reaches its end-of-life:
•Fans, motors, controls, actuators, cabling and other electrical
components can be segregated into WEEE recycling streams.
•Sheet metal parts, aluminium extrusion, heating/cooling coils and
other metallic items can be segregated and fully recycled.
•EPP, plastic ducting, nylon corner pieces, plastic heat exchangers,
packaging material and other plastic components can be
segregated into mixed plastic and widely recycled.
•Cardboard packaging, wood, used filters and other paper
components can be largely recycled or fully processed in energy
from waste centres.
•Remaining items can be further segregated for energy from waste
centres or, as a last resort, sent to landfill. Please call After Sales
Support for further information on items not listed above.
IMPORTANT
Ensure that Nuaire product is made safe from any electrical
/ water / refrigerant supplies before dismantling commences.
This work should only be undertaken by a qualified person in
accordance with local authority regulations and guidelines,
taking into account all site based risks.
Technical or commercial considerations may, from time to time, make it necessary to alter the design, performance and dimensions of equipment
and the right is reserved to make such changes without prior notice.
10.0 AFTER SALES AND REPLACEMENT PARTS
For technical assistance or further product information, including spare
parts and replacement components, please contact the After Sales
Department.
If ordering spares please quote the serial number of the unit together
with the part number, if the part number is not known please give a full
description of the part required. The serial number will be found on the
identification plate attached to the unit casing.
Telephone [phone]
[e-mail]

04. 02. 20. Document Number 671847 7 Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
AX
Installation Manual
NOTES
7

04. 02. 20. Document Number 671847 8 Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
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Installation Manual
NOTES