NuAire NSC1-A-B Series User manual

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29. 07. 20. Document Number 671923Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
NSC1-*A-B
Speed Control for Single Phase Motors
Installation Manual
EMC Directive
2014/30/EU
LVD Directive
2014/35/EU
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.
• 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 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.
REFER TO 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 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.

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29. 07. 20. Document Number 671923Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
NSC1-*A-BInstallation Manual
2.0 INTRODUCTION
The installation must be carried out by qualified personnel in
accordance with the appropriate authority and conforming to all
statutory and governing regulations e.g. IEE, CIBSE etc.
This control is for use with single phase fans that are suitable for speed
control only. Fan motors used should be internally protected from
overheating.
2.1 Code Description:
NSC 1 - 3A - B
12-3 - 4
1. Range: NSC = Nuaire Speed Control
2. Electrical Power: 1= Single Phase
3. Rated Max Current: 3A, 6A, 10A
4. Model Version: B
3.0 INSTALLATION
Installation must be completed by competent persons, in accordance
with good industry practice and should conform to all governing and
statutory bodies i.e. IEE, CIBSE, etc.
Before commencing work ensure the electrical supply is
disconnected.
3.1 Dimensions (mm)
1 Dimensions
E
D
A
B
C
Unit Dimensions (mm)
A B C D E
NSC1-3A-B 162 96 75 71 108.8
NSC1-6A-B 205 124 97 102 140
NSC1-10A-B 205 124 97 102 140
3.2 Wall Mounting
The unit must be mounted on a secure, vibration free smooth
vertical surface away from direct heat sources or water spray. The
maximum permissible ambient temperature is 35°C.
Unscrew the front cover and open the enclosure. Note the wires
connecting the potentiometer to the PCB.
Whilst ensuring the correct mounting position (Figure 2), fix the unit to
the surface using the screws and dowels provided (Figure 1).
2 Mounting Orientation
3.3 Electrical Information
Voltage: 110-240, 50-60Hz
Unit Max Current Fuse
NSC1-3A-B 3.0A F-5,0 A-H 250Vac
NSC1-6A-B 6.0A F-10,0 A-H 250Vac
NSC1-10A-B 10.0A F-16,0 A-H 250Vac
3.4 Wiring Diagrams
Complete the control wiring using the correctly sized cables as per the
wiring diagram (Figure 3). Connect the motor/fan before connecting
the earth and power cables.
Connection L1 is provided as an extra connection to for example a
damper or as an input to the control without bypassing the front
controlling knob.
Power supply
110—240 VAC / 50—60 Hz
3 Wiring
•L= Power Supply, 110—240 VAC / 50—60 Hz
•N= Neutral
•L1 = Unregulated Output, Imax. 2 A
•PE = Earth Terminal
•U2 = Regulated Output To Motor - Line
•U1 = Regulated Output To Motor - Neutral
4.0 CONTROLS
4.1 Adjusting Minimum Speed
With the potentiometer at minimum, adjust the trimmer screw (Figure
4) so that the motor will continue to run and also restart smoothly in
the event of a power fault. As default is the trimmer is set at 45% in
the factory, Nuaire recommend a minimum of 30%.
4 Minimum Speed Adjustment

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29. 07. 20. Document Number 671923Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
NSC1-*A-BInstallation Manual
8.0 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 and processed in
accordance with the zero waste hierarchy. 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.
9.0 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]
4.2 Setting Kick Start
There are two start modes, internally selectable by fitting or removing
the jumper located on the PCB (Figure 5).
•Hard Start: Motor starts at maximum speed for 8-10 seconds,
then follows the position of the potentiometer.
•Soft Start: Motor starts according to the position of the
potentiometer.
KickStart Mode Jumper Setting
Hard Start
Soft Start
5 Kick Start Jumper Setting
4.3 Changing Fuse
The fuse is located on the internal control plate. Remove the front
cover, lift out the fuse with a screwdriver. Use only the correctly rated
fuse, fast ceramic with a high breaking capacity. Use of an incorrect fuse
will void warranty.
5.0 TROUBLESHOOTING
•Check that the correct voltage is applied and that all connections
are correct.
•Check the fan to be controlled is functional.
•Check the fuse at the fusebox.
•Check the fuse at the control.
6.0 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.
6.1 Routine Maintenance
This control requires no maintenance other than cleaning. Disconnect
supply and clean with a damp cloth, Do not spray cleaning fluids onto
the control.
7.0 WARRANTY
The 3year 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.

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29. 07. 20. Document Number 671923Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA |nuaire.co.uk
NSC1-*A-BInstallation Manual
NOTES