NuAire SVTC Series User manual

04. 02. 20. Document Number 671635 1 Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
LVD Directive
2014/35/EU
SVTC
Induction Centrifugal Fan
High Temperature 300° for 2 hrs
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 671635 2 Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
SVTC
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 Nuaire SVTC impulse unit comprises a high temperature
centrifugal fan enclosed in a galvanised steel casing. The impeller
shall be made from a welded and painted steel sheet.
The air intake of the SVTC is on the lower side. The air is conveyed over
the motor and then directed towards a horizontal discharge nozzle at
the front of the unit.
The electrical cable is specified for high thermal loads, protected
against mechanical stresses, and connects to a metal isolator box
placed on the casing side.
The units are designed for ceiling installation (hanging) and may only
be fitted with the mounting brackets using certified anchoring bolts.
The Nuaire SVTC unit comprising fan/motor assembly shall be certified
for high temperature operation at 300OC for 2 hours. The range shall
have been type 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 SVTC unit shall have an inlet guard for safety purposes and
also to prevent debris being sucked through the fan.
EN12101-3 compliant, refer to EC certificate of conformity 10086-
CPD-467873.
2.1 Code Description:
SVTC - 50 T8 G
| | | |
1 2 3 4
1. Range: Induction Centrifugal Fans, 300°C for
2 hrs
2. Performance Size: 50 or 100
3. Speed Control: No Suffix = Single Speed, Suitable for
Frequency Inverter
T8 = 2 Speed 4/8 Pole
3. Electrical Motor Details: No Suffix = 400V / 50Hz
G = 460V / 60Hz
J = 460V / 60Hz
3.0 DELIVERY & HANDLING
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.
4.0 MECHANICAL INSTALLATION
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 serialised at works and a test certificate
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.
4.1 Fitting Unit to Ceiling
Raise the SVTC unit up into the chosen mounting position. Using the
four holes in the top side of the two brackets either side of the unit
attach the unit to the ceiling/support crossbars with certified anchoring
bolts (Figure 2). The rear mounted bracket is utilised in installations
where drop rods are used to provide additional stability on fan startup.
Inlet
Discharge
1 Unit Airflow Directions

04. 02. 20. Document Number 671635 3 Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
SVTC
Installation Manual
Fixing bracketFixing bracket
Fixing
bracket
CEILING SLAB
E
A
BJ
F G
All fixing holes M12 clearance
H G
C D
Side view
Bottom view
2
3
Unit Installation
L2 L3L1
L1 N/L3 PE L/L2 W U V
Connections
to motor
3 Phase input
3 Phase only
INVERTER SPEED CONTROL
Motor
7 Wiring - Three Phase - Inverter Speed Control
Unit Dimensions
5.0 DIMENSIONS
6.0 ELECTRICAL INSTALLATION
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.
6.1 Wiring
Electrical supply wiring connection is to an externally mounted isolator
box on the case exterior. The box is pre-wired to the motor with heat
resisting cable.
Individual wiring instruction are included with each unit.
Unit
Code
Dimensions (mm) Weight
(kg)
A B C D E F G H J
SVTC-50* 1265 226 790 893 710 844 448 234 265 100
SVTC-50T8J 1265 226 790 893 710 844 448 234 302 195
SVTC-100 1900 278 1150 1260 1150 1204 730 319 319 195
*Dimensions for all SVTC-50 models, except where otherwise noted.
U1
V1
W1
W2
U2
1 2
3 4
5 6
7 8
9 10
11 12
V2
4 Wiring - Three Phase (3kW and Below) - Single Speed
STAR
L1 - U1
L2 - V1
L2 - W1
U1
V1
W1
W2
U2
1 2
3 4
5 6
7 8
9 10
11 12
V2
5 Wiring - Three Phase (4kW and Above) - Single Speed
STAR
L1 - U1
L2 - V1
L2 - W1
Link W2, U2, V2
DELTA
L1 - U1 - W2
L2 - V1 - U2
L3 - W1 - V2
U1
V1
W1
W2
U2
1 2
3 4
5 6
7 8
9 10
11 12
V2
6 Wiring - Three Phase - Two Speed TAP/PAM Wound
Motor D.O.L Starting (Both Speeds)
HIGH SPEED
L1 - U2
L2 - V2
L2 - W2
Link U1, V1, W1
LOW SPEED
L1 - U1
L2 - V1
L3 - W1

04. 02. 20. Document Number 671635 4 Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
SVTC
Installation Manual
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.
iv. 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.
v. Fixing Check
During regular maintenance, check all fixtures and fittings to ensure
they have remained secure and in good working order.
S1 duty and Emergency in S2 duty:
a) Permanently greased bearings.
300°C or 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) Regreaseable bearings
The information on the motor nameplates must be strictly respected
(grease quantity, grease quality and regreasing frequency). The bearings
must be replaced after 20,000 hours of operation.
8.0 MAINTENANCE
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.
8.1 Routine Maintenance (Every 3 Months)
•Clean all areas of unit and treat any areas of corrosion.
•Check all access doors for leakage and if necessary locks should be
adjusted and any replacement gasket materials should be replaced
as required.
8.2 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.
8.3 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 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 impeller from unit (C) by lowering it out of casing.
•Re-fitting the assembly is achieved by performing the above
process in reverse order.
6.2 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 approx. 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.
7.0 SPECIFIC COMMISSIONING AND SERVICING
REQUIREMENTS
Motors for Smoke Extract Fans
Exposure temperature/time: 300°C for 2 hours / 400°C for 2 hours
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.
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 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.
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 applications as described on
the Customer Order free of charge.
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.

04. 02. 20. Document Number 671635 5 Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
SVTC
Installation Manual
IMPORTANT
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.
8.4 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.
9.0 WARRANTY
The 3 year warranty starts from the day of delivery and includes parts
and labour for the first year. The labour element is subject to full,
free and safe access to the equipment as recommended by the CDM
regulations. The remaining two years 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.
B
C
A
8 Removing Motor / Impeller Assembly
10.0 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.
•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.
11.0 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]
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.

04. 02. 20. Document Number 671635 6 Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
NOTES

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NOTES
7

04. 02. 20. Document Number 671635 8 Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
SVTC
Installation Manual
DECLARATION OF INCORPORATION AND INFORMATION FOR SAFE INSTALLATION,
OPERATION AND MAINTENANCE
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. 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.
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)
1.0 GENERAL
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 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 TRANSPORTATION, HANDLING AND STORAGE
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 e.g. 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.
4.4 Local Environment - Humidity. Ambient humidity (the humidity at the unit’s installed location) shall be
within the range: 10 to 95% (for controls, non-condensing). Air humidity (the humidity of
the air passing through the unit) shall be within the range: 10 to 95% (for controls, non-condensing).
5.0 INSTALLATION REQUIREMENTS
In addition to the particular requirements given for the individual product, the following general requirements
should be noted.
5.1 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 (e.g. 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 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.
8.5 Care should be taken when removing and storing access panels in windy conditions.
Note: All standards used were current and valid at the date of signature.
Designation of machinery: AXUS SVTC Induction Fans
Machinery Types: High Temperature Axial Fans 300°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
Signature of manufacture representatives:
Name: Position: Date:
1)A. Thomas Engineering Director 31. 01. 20
2)C. Sargent Manufacturing Director 31. 01. 20