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Installation Guidenuaire SVTC8 Induction Centrifugal Fan


  • 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 the 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 the 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.

1. 1 Hazard Symbols

ETS-Lindgren 8000-040 RF Power Amplifier - icon 4 GENERAL WARNING
Signifies a general warning regarding hazard specified by supplementary information.
ETS-Lindgren 8000-040 RF Power Amplifier - icon 5 ELECTRIC SHOCK
This unit must be completely electrically isolated before any panels are removed. Check mains supply and control connections.
nuaire SVTC8 Induction Centrifugal Fan - icon 1 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.
Clarke IDH70L 70L Industrial Dehumidifier - icon 5 REFER TO THE INSTRUCTION MANUAL
Read and understand the installation and maintenance manual before installing, operating or maintaining this product.

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 products:

  • 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 that have been in contact with a 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.


The Nuaire SVTC8 unit comprising fan/motor assembly shall be certified for high-temperature operation at 400°C for 2 hours. The range shall have been typing tested to  EN12101-3.
The units shall be either 2-speed or inverter driven providing, low speed for day-to-day environmental ventilation and one-off operation for emergency ventilation (S1 duty).
The Nuaire SVTC8 unit shall have an inlet guard for safety purposes and also to prevent debris from being sucked through the fan.
EN12101-3 compliant.

2.1 Code Description:

nuaire SVTC8 Induction Centrifugal Fan - math 2nuaire SVTC8 Induction Centrifugal Fan - Figure 1


All equipment is inspected prior to despatch and leaves the factory in good condition. Upon receipt of the equipment, an inspection should be made and any damage indicated on the delivery note. Particulars of damage and/or incomplete delivery should be endorsed by the driver delivering the goods before offloading by the purchaser.
No responsibility will be accepted for damage sustained during the offloading from the vehicle or on the site thereafter. All claims for damage and/or incomplete delivery must be reported to Nuaire within two days of receipt of the equipment.
Always handle the units carefully to avoid damage and distortion. If mechanical aids are used to lift the unit, spreaders should be employed and positioned so as to prevent the slings, webbing etc. making contact with the casing.


Installation must be completed by competent persons, in accordance with good industry practice, and should conform to all governing and statutory bodies regulations i.e. IEE,  CIBSE, etc., and EN standards, etc.
Before commencing installation check that all material, including mounting feet and optional ancillaries, are available to complete the work. Every unit is tested and serialized at works and a test certificate is produced, the details are also recorded on the fan side rating plate which should also be referred to before handling and installation. Any damage or deviations should be immediately reported to the seller/supplier/agent quoting the order and rating plate details.
The table below states the main characteristics of the SVTC8 fan range certified for operation at 400°c for 2 hours. The unit:

  • Is thermally uninsulated.
  • May be located in the smoke reservoir.
  • Is dual purpose i.e. suitable for the day-to-day operation and one-off emergency use?
  • Suitable for mounting in horizontal orientation only.

4.1 Fitting Unit to Ceiling
Raise the SVTC8 unit up into the chosen mounting position. Using the four holes in the top side of the two brackets on either side of the unit attaches the unit to the ceiling/support crossbars with certified anchoring bolts (Figure 2). The rear-mounted bracket is utilized in installations where to drop rods are used to provide additional stability on fan startup.nuaire SVTC8 Induction Centrifugal Fan - Figure 2


nuaire SVTC8 Induction Centrifugal Fan - Figure 3


Motors are totally enclosed and protected to IP55 (Dust and low-pressure water jets). Motors comply with BS5000, EN600034, and IEC34-1. Enclosures are to IP55 with class  H insulation. Motors are tested in accordance with EN12101-3 2015.
Note the requirements for maintenance of the motor. Failure to comply with the recommendations will invalidate any warranty claim.
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.

6.1 Wiring
The electrical supply wiring connection is to an externally mounted isolator box on the case exterior. The box is pre-wired to the motor with a heat-resisting cable.
The total length of motor leads should not exceed 30 meters. If a screened motor cable is used, the maximum length should be 25 meters. Consult our 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.
Individual wiring instructions are included with each unit.
Under fire conditions, the electrical supply must not run through the inverter (the inverter must be bypassed).

Star D.O.L. Starting (3kW and below) – 3 Phase nuaire SVTC8 Induction Centrifugal Fan - Figure 4

Delta D.O.L. Starting (4kW and above) – 3 Phase

nuaire SVTC8 Induction Centrifugal Fan - Figure 5

Two Speed – Dual Wound Motor – 3 Phasenuaire SVTC8 Induction Centrifugal Fan - Figure 6

Two Speed – TAP / PAM Wound Motor – 3 Phasenuaire SVTC8 Induction Centrifugal Fan - Figure 7

Two Speed Motors – Example Contactor Controlnuaire SVTC8 Induction Centrifugal Fan - Figure 8

Speed Control – Inverter – 3 Phasenuaire SVTC8 Induction Centrifugal Fan - Figure 9

6.2 Start-Up Procedure
Ensure that the impeller rotation follows the label arrow indicator on the casing. Should th tely to treat/restore any damaged areas.

  • Check to seal of motor and gland plate.
  • Check for visible damage (cracked impeller, fan cowl bent, etc.)
  • Check for excessive vibration.
  • Check insulation resistance is adequate, imperative this is checked after a prolonged shutdown.
  • Tighten fasteners.
  • All electrical connections within the unit should be tightened.

8.2 Motor/Impeller Removal
If the motor or impeller has to be removed for cleaning the following procedures are recommended:
Inspection of the motor/impeller must be made by using the intake and discharge openings.

  • Motor connection cables to be unfastened within metal isolator box (A).
  • Taking care, feed the cable contact back into the unit casing.
  • Before loosening bolts (B) of the motor impeller (C) care must be taken to prevent the unit from falling down – e.g. by using a lifting device or elevating platform.
  • To remove the motor/impeller – loosen bolts (B). Before loosening bolts (B) of the motor impeller (C), care must be taken to prevent the unit from falling down i.e. by using a  lifting device or elevating platform.
  • Remove the impeller from the unit (C) by lowering it out of the casing.
  • Re-fitting the assembly is achieved by performing the above process in reverse order.
    nuaire SVTC8 Induction Centrifugal Fan - Figure 10

8.3 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.


The 3 year warranty starts from the day of delivery and includes parts and labor for the first year. The labor element is subject to full, free, and safe access to the equipment as recommended by the CDM regulations. The remaining two years cover replacement parts only.
This warranty is void if the equipment is modified without authorization, 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 the Nuaire International Sales office for further details.
Failure to maintain the unit as recommended will invalidate the warranty.


Where possible Nuaire uses components that 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, aluminum extrusion, heating/cooling coils, and other metallic items can be segregated and fully recycled.
  • Cardboard packaging, wood, used filters and other paper components can be largely recycled or fully processed in energy from waste centers.
  • Remaining items can be further segregated for energy from waste centers or, as a last resort, sent to landfill. Please call After Sales Support for further information on items not listed above.

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.


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 02920 858 400 [email protected]

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.


We declare that the machinery named below is intended to be assembled with other components to constitute a system of machinery. All parts except for moving parts requiring the correct installation of safety guards comply with the essential requirements of the Machinery Directive. 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.

Designation of machinery: AXUS SVTC8 Induction Fans
Machinery Types: High-Temperature Axial Fans 400°C/2hrs
Relevant EC Council Directives: 2006/42/EC
Applied Harmonised Standards: BS EN ISO 12100-1, BS EN ISO 12100-2, BS EN 60204-1, BS EN ISO 9001, BS EN ISO 13857
Applied National Standards: BS848 Parts 1, 2.2 and 5

nuaire SVTC8 Induction Centrifugal Fan - Signature

Note: All standards used were current and valid at the date of signature.


To comply with EC Council Directives 2006/42/EC Machinery Directive and 2014/30/EU (EMC).
To be read in conjunction with the relevant product documentation (see 2.1)


  1. The equipment referred to in this Declaration 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 manufacturer’s recommendations and with due regard to current legislation and codes of practice.


  1. Each item of equipment is supplied with a set of documentation that provides the information required for the safe installation and maintenance of the equipment. This may be in the form of a Datasheet and/or Installation and Maintenance instruction.
  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.
  3. Where warning labels or notices are attached to the unit the instructions given must be adhered to.


  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.
  2. When handling the equipment, care should be taken with corners and edges and 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. Equipment stored on site prior to installation should be protected from the weather and steps taken to prevent ingress of contaminants.


  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.
  2. Where installation accessories are supplied with the specified equipment e.g. wall mounting brackets. They are to be used to support the equipment only. Other system components must have separate provisions for support.
  3. Flanges and connection spigots are provided for the purpose of joining duct work systems. They must not be used to support the ductwork.
  4. Local Environment – Humidity. Ambient humidity (the humidity at the unit’s installed location) shall be within the range: of 10 to 95% (for controls, non-condensing). Air humidity (the humidity of the air passing through the unit) shall be within the range: of 10 to 95% (for controls, non-condensing).


  1. In addition to the particular requirements given for the individual product, the following general requirements should be noted.
  2. Where access to any part of equipment that moves, or can become electrically live are not prevented by the equipment panels or by fixed installation detail (e.g. ducting),  then guarding to the appropriate standard must be fitted.
  3. The electrical installation of the equipment must comply with the requirements of the relevant local electrical safety regulations.
  4. 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.


  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.

Other commissioning requirements are given in the relevant product documentation.

  1. Equipment access panels must be in place at all times during the operation of the unit and must be secured with the original fastenings.
  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).


  1. Specific maintenance requirements are given in the relevant product documentation.
  2. It is important that the correct tools are used for the various tasks required.
  3. If the access panels are to be removed for any reason the electrical supply to the unit must be isolated.
  4. A minimum 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 airflow generated at some other point in the system can cause the impeller to “windmill” even when power is not present.
  5. Care should be taken when removing and storing access panels in windy conditions.

01. 09. 21. Document Number 671711
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |

Documents / Resources

nuaire SVTC8 Induction Centrifugal Fan [pdf] Installation Guide
SVTC8 Induction Centrifugal Fan, SVTC8, Induction Centrifugal Fan


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