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nuaire.co.uk
029 2085 8400
18. 03. 19. Leaflet Number 671775
The EMC Directive
2014/30/EU
The Low Voltage
Directive
2014/35/EU
NALTM 50 & 60HZ
Metal Cased Centrifugal Fans
Installation and Maintenance
1.0 INTRODUCTION
The NALTM unit is supplied with a pre-wired terminal box and an IP44 rated,
class B (unit sizes 100-160) or class F (unit sizes 200-315) insulated motor. The
fans are designed to convey clean air with a maximum temperature of up to
60°C (NALTM-315H up to 55°C only).
Do not operate the fan in the presence of inflammable vapours (alcohol etc). An
adequate supply of fresh air must be provided if the fan is to be fitted in a room
with a gas burning appliance which is not of the balance flue type.
4.0 DIMENSIONS (mm) & Weights (kg)
Figure 1. Unit Drawing
Code Description:
NALTM-100H
1 2 3
1. NALTM - Centrifugal Metal Tube Fan Range
2. 100 - Case Size
3. No Suffix - 50Hz 230V
H - 60Hz 220V
2.0 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 the
casing, connection box, impeller or inlet cone.
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
(e.g. IEE, CIBSE etc.).
From the fan Rating Plate, observe the weight of the unit and select the
mounting position and structure that can support the unit.
These fans are not for stand-alone use. They are designed to be incorporated
into ducted systems, machines or where safe (i.e. operation has been ensured by
providing applicable protection to moving parts).
This unit is not designed for external use. Before installing ensure the impeller is
running freely and there are no obstructions to the airflow
A robust mounting foot is available as an accessory, to ease installation.
Figure 2. Unit Dimensions
50 Hz Code
60 Hz Code
A
B
C
D
E
Weight
NALTM-100
NALTM-100H
241
98
196 150
23
3
NALTM-125
NALTM-125H
241
123
198 144
27
3
NALTM-150
NALTM-150H
332 147
212 166
23
5
NALTM-160
NALTM-160H
332
157
221 175
23
5
NALTM-200
NALTM-200H 333 198 223 173
25
5
NALTM-250
NALTM-250H 333 248 206 152
27
6
NALTM-315
NALTM-315H
401
312 230 180
25
8
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.
Isolation - Before commencing work, make sure that the unit,
switched live and any controls are electrically isolated from the mains
supply.
Please note that this product must be earthed.
IMPORTANT
5.0 ELECTRICAL WIRING
Electrically isolate unit before commencing any work. Ensure that the voltage
and frequency of the electrical supply match the information stated on the
Rating Plate on the unit. Wire the unit as shown in the wiring diagram. On
connecting the electrical supply, ensure that the airflow direction corresponds
with the direction of the airflow arrow sited on the unit.
MOTOR
YELLOW-GREEN
BLACK
L N
BLUE
BROWN
Figure 3. Wiring diagram
Electrical Note:
Because the run and start currents depend upon the duty and
associated duct work of an individual unit, the values quoted in the table are
nominal.
Run currents will be exceeded if the unit is operated beyond the operating curve
shown in the performance catalogue.
