A
50mm
B
F
C
E
Rectangular spigots
(size NALTF 18-24)
Circular
spigots
(NALTF 9-17)
D dia
Removable top
panel
Figure 2. NALTF and NALTRF-1 Units Dimensions
A
B
Removable
top panel
Opposed
outlet
grilles
F
E
Control module
located internally
Bottom inlet
C
Louvred
end outlet
Bottom rectangular
inlet spigot
F
E
B
A
C
Spigot
Unit
A
B
C
E
F
NALTRF9 to NALTRF10
974
974
622
457
229
NALTRF11 to NALTRF12
1233
1233
701
762
304
NALTRF13 to NALTRF17
1430
1635
796
889
381
Unit
A
B
C
D dia
E
F
NALTF9-10,
NALTRF9-10
974
974
622
400
-
-
NALTF11-12,
NALTRF11-12
1233
1233
701
500
-
-
NALTF13-17,
NALTRF13-17
1430
1635
796
630
-
-
NALTF18-24,
NALTRF18-24
2030
2313
1183
-
1200
700
Rect Spigot
Unit
A
B
C
E
F
NALTRF18 to NALTRF24
2030
2313
1183
1200 700
Figure 1. Lifting unit with slings
via spreaders.
Figure 3. NALTRF Bottom Inlet Units Dimensions
Figure 4. NALTRF Larger Bottom/End Inlet Units Dimensions
1
15. 05. 17. Leaflet Number 671269
NALTF & NALTRF
Belt Drive Roof and Plantroom Twinfans
Installation and Maintenance
The EMC Directive
2014/30/EU
The Low Voltage
directive
2014/35/EU
2.0 Dimensions
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
o
C.
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
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.
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
