NuAire NALSC Instruction Manual

Isolation - Before commencing work make sure
that the unit, and any control are
electrically isolated from the mains supply.
1
15. 05. 17. Leaflet Number 671524
The EMC Directive
2014/30/EU
The Low Voltage
directive
2014/35/EU
Introduction
The NALSC range of short cased axial fans are
manufactured from galvanised steel and incorporates
inlet and outlet flanges with pre-drilled bolt holes.
All motors are totally enclosed and protected to IP54, class
F insulated with sealed for life bearings.
Impeller blades are manufactured from die cast aluminium,
and sizes 315-500 use advanced sickle design. All other
sizes use high efficiency aerofoil sections.
The fan is designed to form part of a ducted system. If fitted
within 1.5mm of the end of a duct run, a suitable guard or louvre
should be fitted. Anti-Vibration mountings and flexible connectors
are available as accessories and are recommended to minimise
noise and vibration. Note that the mountings MUST be used in
compression only.
1.0 Handling
Always handle the fans carefully to avoid damage and distortion.
Care should be taken to ensure that any slings used for lifting
purposes do not damage or pass through the impeller.
Always check the unit weight on rating label before lifting.
2.0 Dimensions (mm) & Weights (kg)
Fan Code A B C D E F deg G Weight
dia. dia. dia. dia. Kg
NALSC315-41 382 317 9.5 356 135 8x45 6 6.5
NALSC350-41 421 356 9.5 395 135 8x45 6 7.5
NALSC400-41 466 400 9.5 438 155 12x30 6 10.3
NALSC450-41 515 451 9.5 487 160 12x30 6 15.8
NALSC500-41 567 503 9.5 541 165 12x30 6 16.6
NALSC560-41 635 559 11.5 605 210 16x22 8 17.4
NALSC560-43 635 559 11.5 605 210 16x22 8 18.5
NALSC630-43 707 634 11.5 674 220 16x22 8 29
NALSC710-63 785 711 11.5 751 260 16x22 10 34
NALSC800-63 875 797 11.5 837 280 24x15 10 39
NALSC1000-83 1080 1001 11.5 1043 330 24x15 5 66
3.0 Installation
Installation must be carried out by a competent person in
accordance with the appropriate authority and conforming to all
statutory and governing regulations i.e. IEE, CIBSE, COSHE etc.
All duct connections must be airtight to prevent any loss of
performance.
Connection Details
Wiring should only be carried out by a qualified electrician and in
accordance with all relevant statutory and governing regula-
tions.
Check the fan details on the rating plate correspond with
the supply voltage and frequency.
The fan unit incorporates a terminal box on the casing exterior.
Units for external use require weatherproof conduit and glands.
DO NOT use metal terminal box glands.
Motors are designed for Direct On Line starting.
Motor overloads should be set to the full load current on the
fan rating label.
Supply fuses should be H.R.C. type.
All fans are suitable for speed control.
Start Up Procedure
Note: single phase rotational direction is set at works and should
NOT be altered. Motor winding thermal protection connectional
must be made.
Equipment should be run for approximately 30 seconds to
ensure correct operation. If a fault occurs, switch off.
Do not restart until fault has been rectified.
Testing after Installation
If a speed control is fitted, check the speed variation is obtained.
4.0 Electrical Wiring
NALSC
Slim Cased Axial Flow Fan
Installation and Maintenance
Fig. 1.
D dia.
E
72
A
B
G
F deg
C
Three Phase motor with single speed and thermal contacts.
Z2 Z1 U2 U1
PE
TK TK
TK TK W2 U1
L1 L2 L3 P E
U2 V1 V2 W1
Single Phase motor with capacitor and thermal contacts.
L1
N
Fig. 2.
Nuaire: A Trading Division of Polypipe 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

2
15. 05. 17. Leaflet Number 671524
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
Installation and Maintenance NALMOD Direct Drive Air Handling Units
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.
Isolation - Before commencing work make sure
that the unit, and any control are
electrically isolated from the mains supply.
5.0 Inspection and Maintenance
Before maintenance, service or repair make sure that:
The unit and speed control, if fitted, are electrically isolated from
the mains supply.
The fan is rated for S1 continuous operation. Controls must not
allow extreme switching operation.
Maintenance Intervals
The first maintenance should be carried out three months after
commissioning and thereafter at twelve monthly intervals.
These intervals may need to be shortened if the unit is operating
in adverse environmental conditions, or in heavily polluted air.
General Cleaning and Inspection
Clean and inspect the exterior of the fan unit and associated
controls etc. Clean the fan and motor assemblies and the interior
of the case. Clean and inspect the impeller and motor assembly
as follows, taking care not to damage, distort or disturb
the balance of the impeller.
Motors are fitted with sealed for life bearing and therefore do
not require any further lubrication.
a) Lightly brush away dirt and dust, paying particular attention
to any build up at the motor ventilating slots. If necessary,
carefully remove with a blade or scraper.
b) Stubborn dirt at the impeller maybe carefully removed with a
stiff nylon brush.
c) Check all parts for security and general condition.
Check that the impeller rotates freely.
Refit the assemblies to the unit if speed controls are fitted,
remove the covers and carefully clean out the interiors as
necessary.
Check for damage. Check security of components.
Refit the covers.
6.0 Replacement of Parts
The only item of the fan unit likely to require replacement is the
motor/impeller assembly due to a failed motor or damaged
impeller. Note: Before commencing work electrically isolate the
fan unit and/or the associated speed control, if fitted from the
mains supply.
Disconnect the incoming wiring from the connection box (located
on the fan case) support the weight of the impeller/motor
assembly and remove the mounting screws and washers.
Lift the assembly out of the case.
After replacing the faulty item, refit the fan/motor assembly and
re-connect the incoming wiring to the fan mounted connection
box.
When 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.
Approx life expectancy of bearings 30-40,000 hours dependent
on conditions and maintenance.
9.0 Warranty
The unit has a one year warranty. The warranty starts from the
date of delivery and covers faulty materials or workmanship and
includes parts and labour.
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.
10.0 After Sales Enquiries
For technical assistance or further product information,
including spare parts and replacement components, please
contact the After Sales Department.
Telephone [phone]