NuAire AXUS SVT2 Instruction Manual

Nuaire 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
Introduction
The Nuaire SVT2 impulse unit comprises a high temperature
axial fan with specially designed inlet and outlet attenuators
which, along with the fan unit, are encased in a Galvanised
steel acoustic enclosure.
Fan Coding Descriptions
SVT2 - 1 (A-E)
123
1. AXUS Impulse fan
2. Case size
3. Impeller blade angle
The Nuaire SVT2 unit comprising fan/motor assembly, and
inlet & outlet silencers 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). They shall also
be suitable for reversible operation.
Fully reversible options (i.e similar duty in both airflow
directions) are available, please contact Nuaire for details.
The unit shall have a unique mounting bracket, which shall
enable the bracket to be positioned as a “first fix” component
with the unit being fitted as a “second fix” component, avoiding
possible mechanical damage.
The Nuaire SVT2 unit shall have inlet guards for safety purposes
and also to prevent debris being sucked through the fan.
It also has a specially designed airflow deflector to
direct the jet stream from the fan at the required
angle sufficient to overcome the natural buoyancy
effect of the smoke. (see page 2 for adjusting).
EN12101-3 compliant, refer to EC certificate of
conformity, 0086-CPD-467873.
Handling
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
the casing.
Installation
Installation must be carried out by competent personnel in
accordance with the appropriate authority and conforming
to all statutory governing regulations.
1) Fixing the support bracket to the ceiling
The support bracket is included with the unit. Using the four
slots in the top side of the bracket attach to the ceiling ensuring
that it is firmly fixed and able to take the weight (100kg) of the
SVT2 unit.
Figure 2.
2) Fitting the SVT2 unit to the support bracket
Having fixed the support bracket the SVT2 unit can now be
raised up into position between the support bracket on the
ceiling and attached when required using the holes through the
sides of the bracket and the unit.
1Leaflet Number 671409 February 2009
Figure 3.
AXUS SVT2
300oC for 2hr
High Temperature Impulse Axial Fans
Installation and Maintenance
Figure 1.
The EMC Directive
2004/108/EC
The Low Voltage
directive
2006/95/EC

Installation and Maintenance AXUS SVT2 High Temperature Impulse Axial Fans
2
3) Adjusting the SVT2 Deflector blades
The Deflector blades are factory set for horizontal discharge
(default setting) but can be adjusted for downward deflection
using the following procedure.
1. Adjust top blade (A)
by removing the
2 screws at the front
either side of the blade,
tilt down and replace
the screws.
2. Adjust bottom blade
(B) by removing the
2 screws at the back
either side of the blade,
tilt upwards and replace
the screws.
Dimensions (mm)
Electrical Information
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
2002. N.B. Please note the requirements for maintenance of
the motor. Failure to comply with the recommendations will
invalidate any warranty claim.
Wiring
Electrical supply wiring connection is to an externally mounted
terminal box on the case exterior. The box is pre-wired to the
motor with heat resisting cable.
NOTE: If a two speed starter is used it must have 3 contactors.
Individual wiring diagrams are included with each unit.
A matched Nuaire Inverter Speed Control is available. Please
contact Nuaire.
Two speed 3 phase TAP/PAM wound motors (D.O.L.
starting both speeds)
Leaflet Number 671409 February 2009
Connection details
Check that the voltage full load and starting current on the fan
rating label is suitable for your supply.
Two speed motors
Two speed motors are supplied Tap or Pam single winding.
All two speed types are designed for Direct On Line starting
on both speeds only unless otherwise specified.
Note: Tap wound motors require a three contactor control.
Individual wiring instructions are included with each unit.
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.
Maintenance
General
Nuaire recommends all products maintained in accordance with
the HVCA “Standard Maintenance Specification for Mechanical
Services in Buildings” - Volume II Ventilating and Air
Conditioning. For guidance only due to the different periods
of operation from the time of installation and conditions of
use, no rigid inspection and maintenance periods can be
recommended. We suggest, therefore that the inspection and
if necessary cleaning should be carried out at regular intervals
of 1000 hours of operation or 3 months, whichever is the sooner.
For a routine inspection, check the tightness of all nuts, keys,
grub screws and endbolts etc. Remove any build up of dirt or
dust with a brush.
Motors
On going maintenance - Induction motors, by their very nature
require minimal maintenance. However, a regular regime of
inspection is recommended to ensure minor problems do not
escalate into breakdowns. Typical intervals would be 1000
hours of operation or 3 months, whichever is the sooner.
Checklist
■No visible damage i.e. impeller cracked, fan cowl bent, foot
cracked etc.
■No accumulation of dust or fibres on the frame or around
the fan inlet.
■No significant corrosion of the lifting lugs/eyebolts.
■No excessive vibration.
■No loose fasteners.
■Cables and earths are sound.
■Sealing of the motor and gland plate in good condition.
■Insulation resistance adequate, imperative this is checked
after prolonged shutdown.
1U
1V
1W
2U
2V
2W
400V 3 phase
50Hz supply
Link
(if no control
is used)
High speed
Low speed
L1
L2
L3
1U
1V
1W
2U
2V
2W
L1
L2
L3
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.
C
B
A
Terminal
Box
55mm
Dimensions A x B x C
SVT2-1 2300 x 320 x 700*
SVT2-2 2300 x 403 x 700*
*Please allow an additional 55mm
for the width of the Terminal Box.
Figure 4.
Figure 5.
To adjust
Deflector
Blade (A)
To adjust
Deflector
Blade (B)

33 Leaflet Number 671409 February 2009
Installation and Maintenance AXUS SVT2 High Temperature Impulse Axial Fans
Specific Commissioning and
Servicing Requirements
Motors for Smoke Extract Fans
Exposure temperature/time: 300oC for 120 minutes.
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 the insulation resistance
(R>100MOhms, 500V DC)
a) If the drain holes are blocked, open them to eliminate any
accumulated condensation.
b) If R<100MOhms, dry the stator in an oven and check
the insulation
resistance. If the fault persists, replace the stator.
c) The stator must be replaced 5 years after installation or
after 20,000 hours of operation.
ii. Cooling check
a) Ensure there is no dust or grease in the entire ventilation
circuit (housing fins, motor cover/fan if fitted driven fan).
b) 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.
300oC range; replace on 2 pole motors after 10,000 hours
of operation and on motors with 4 poles or more after
20,000hours.
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.
Replacement of parts
When ordering spares it is important to state the unit serial
number to ensure that the correct spares will be supplied.
Notes - Fixing bolts, nuts, studs, screws, spacers or washers
are not included with these parts and if required, should be
clearly specified on the order in addition to the part description
number.
Warranty
The three 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.
Note: Installation and maintenance of the equipment must be
undertaken as directed in the instructions provided with the
unit.
Enquiries
Please contact Nuaire Limited for information on any aspects
of the motor performance that may need clarification. Contact
must be made prior to any remedial action being taken under
the warranty.
Please quote the motor serial number in all such cases with
detailed description of the problem.
Service Enquiries
Our service department will be happy to provide any assistance
or further information required. If you have any comments or
queries on any of our products or services please write to the
Product Information Manager at the main address on page one
of this document.
Customer Services Department
Tel: [phone]
Fax: [phone]
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.

4Leaflet Number 671409 February 2009
DECLARATION OF INCORPORATION AND INFORMATION FOR SAFE INSTALLATION,
OPERATION AND MAINTENANCE
To comply with EC Council Directives 98/37/EC Machinery Directive and
2004/108/EC (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 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.
4.4 In the event of RF interference the fan may increase in speed or make high pitched
noises. This is normal and will have no adverse effect on the fan. The speed and
noise will return to normal once the interference has subsided.
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
(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 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.
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.
Designation of machinery: Axus SVT2 Impulse Fan
Machinery Types: High Temperature Axial Fans
Relevant EC Council Directives: 98/37/EC as amended by 98/79/EC
(Machinery Directive)
Applied Harmonised Standards: BS EN ISO 12100-1, BS EN ISO 12100-2,
EN294, EN60204-1, BS EN ISO 9001
Applied National Standards: BS848 Parts One, Two and Five
Signature of manufacture representatives:
Name: Position: Date:
1) C. Biggs Technical Director 20. 07. 07
2) W. Glover Manufacturing Director 20. 07. 07