NuAire NALTF Series Installation And Maintenance Manual

Introduction
The Nuaire NALTF and NALTRF Belt Drive Twinfan range
consists of the following units:
NALTF/NALTRF Plantroom/Roof in line mounted unit.
NALTRF Plantroom/Roof bottom inlet unit.
NALTRF Plantroom/Roof bottom/end inlet unit .
(Larger sizes).
Units are rectangular in section and the casing is
manufactured from heavy gauge 'Aluzinc' aluminium-zinc
coated mild steel.
A full size internally lined access panel is fitted to the top
face and is fully detachable for inspection purposes.
The motor plate and frames are supported on the base by
resilient mountings allowing the fan unit to be operated
without the need for separate anti vibration fan case
mountings.
The units incorporate two independent motors with high
efficiency, forward curved centrifugal impellers running in
metal scrolls. Taperlocked pulleys and wedge drive belts are
employed. The fans discharge into a common outlet chamber
through a shutter system that prevents 'blowback through
the standby fan. The motors are manufactured to BS5000
and are suitable for three phase supply.
Airflow and failure monitors are standard for sizes 9 to 15.
All motors have Class F insulation and are suitable for
operation in ambient temperatures up to 40
1.0 Handling
Always handle the units carefully to avoid damage and
distortion. Eyebolts are provided on some units for lifting.
If mechanical aids are used to lift the unit, spreaders should
Figure 1. Lifting unit with slings
via spreaders.
Nuaire: A Trading Division of Polypipe Limited Western Industrial Estate Caerphilly United Kingdom CF83 1NA
T: 029 2088 5911 F: 029 2088 7033 E: info@nuaire.co.uk W: www.nuaire.co.uk
NALTF & NALTRF
Belt Drive Roof and Plantroom Twinfans
Installation and Maintenance
o C.
be employed and positioned so as
to prevent the slings, webbing etc.
making contact with the
casing.
Correctly position slings
to avoid twisting of the
unit case and observe
the centre of gravity
before the final lift is
made. Note: the weight
of the unit from the
rating plate.
2.0 Dimensions
Figure 2. NALTF and NALTRF-1 Units Dimensions
Removable top
panel
C
A
Unit
NALTF9-10, NALTRF9-10
NALTF11-12, NALTRF11-12
NALTF13-17, NALTRF13-17
NALTF18-24, NALTRF18-24 2030
Figure 3. NALTRF Bottom Inlet Units Dimensions
Removable
top panel
A
Opposed
outlet
grilles
C
Bottom inlet
Unit
NALTRF9 to NALTRF10
NALTRF11 to NALTRF12
NALTRF13 to NALTRF17
Figure 4. NALTRF Larger Bottom/End Inlet Units Dimensions
A
C
F
Unit
NALTRF18 to NALTRF24
1
The EMC Directive
2014/30/EU
The Low Voltage
directive
2014/35/EU
E
50mm
F
Circular
spigots
(NALTF 9-17)
B
Rectangular spigots
(size NALTF 18-24)
A B C D dia
974 974 622 400
1233 1233 701 500
1430 1635 796 630
2313 1183 - 1200
B
Control module
F
E located internally
Spigot
A B C E
974 974 622 457
1233 1233 701 762
1430 1635 796 889
B
Louvred
end outlet
E
Bottom rectangular
inlet spigot
Rect Spigot
A B C E
2030 2313 1183 1200
15. 05. 17. Leaflet Number 671269
D dia
E F
- -
- -
- -
700
F
229
304
381
F
700