Introduction
The Nuaire AXR Roof mounted unit is designed to operate day
to day as standard roof extract fan. However, in the event of a
fire, the unit can extract smoke at temperatures up to 400
o
C
for a maximum of two hours. The fans have airflow rates up to
23m
3
/s and static pressure up to 555Pa.
The unit is available in four case sizes
AXR 56, AXR 71, AXR 100, AXR 125.
(See page 3 for dimensions and weights). The 56 and 71 units
are manufactured in aluminium alloy. 100 to 125 size units are
manufactured in polyester powder painted galvanised steel.
All units have airflow operated shutters which are weather
proof when closed. The bird/ safety guards on the outlet are
designed to automatically displace if blocked by fire debris etc.
The fans incorporate a directly driven, high performance,
temperature rated, form ‘A’ aluminium alloy (300
o
C) and steel
(400
o
C) axial flow type impellers.
Access to the impeller/motor is made by removing the top
cover assembly.
Coding
AXR100
A
4
1
3
A
7
T
1
2
3
4 5
6
7
8
9
1
AXUS roof mounted axial fan
2
Impeller diameter (mm)
3
Motor speed (poles)
4
Performance curve number
5
Impeller blade angle reference
6
Electrical supply in phases
3 = 400V, 50Hz
7
Impeller material
A = Aluminium alloy
S = Steel (mandatory for 400
o
C units)
8
Operating temperature
7 = 300
o
C for 1 hour
8 = 400
o
C for 2 hours
9
Other options (combinations possible)
T = Two speed, (full and half)
T6 = Two speed, (full and two thirds)
(4/6 pole only)
F = Flameproof (EExd 11BT4) (300
o
C only)
Handling
Units are delivered to site mounted onto wooden transit
frames. In addition to making the fans easier to handle during
transit, the frames also afford protection for the motor section.
We advise that the wooden frames should remain on the fans
until the moment of actual installation and fixing.
Handling the unit is best carried out wth the unit fixed to the
transit frame. When lifting, use spreader beams through the
transit frame ensuring the unit is evenly balanced and that the
lifting slings or webbing are not in direct contact with the
casing (see fig 1a).
The larger unit (125) has lifting lugs fitted to each lower
corner to which the slings can be attached which makes the
use of spreaders unnecessary. See figure 1b.
Note. When releasing a larger unit from its metal transit frame
the weight of the unit should first be supported by jacks under
the unit motor supports before attempting to remove the frame
fixing screws.
1
1000 & 1250 units are supplied with eyelets bolted to the cowl,
THESE ARE ONLY TO BE USED TO REMOVE THE COWL FROM
THE BASE.
Under no circumstances must they be used to lift the complete
unit. Note also that units must not be stacked.
AXUS AXR
High Temperature 300
o
C for 1hr, 400
o
C for 2hrs
Roof Mounted Axial Fan for Smoke Control
Installation and Maintenance
Figure 1a. Correct method
of lifting using a spreader.
08. 05. 17. Leaflet Number 671063
The EMC Directive
2014/30/EU
The Low Voltage
directive
2014/35/EU
Frame
retaining
bolts.
Dimension ‘X’
must be
adequate
to clear unit
casing.
Cowl lifting
eyes
(cowl only).
Figure 1b. Lifting a larger unit with
lifting lugs on each lower corner.
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
