2
The drive motor and terminal box on the
fan have separate ATEX markings,
which may differ from the fan marking.
The marking on the fan nameplate
determines the suitability of the fan, and
overrides the markings on the motor and
terminal box.
The EX fans are fitted with nameplates
with information on product type.
The motors are also fitted with
nameplates.
2.2 Weight
The total weight depends on the fan size
and motor size.
Refer to the Airbox program for motor
variations and calculation of weights for
specific fan solutions. See table 3 for max.
motor weights.
Lift the fan using a minimum of three
holes in the flange. Bending of the flange
must be avoided. Large motors are lifted
in the eye-bolts on top of these.
2.3 Temperature
The AZN and AZW fans are designed for
ambient and inlet temperatures between
-20 and +40 °C.
2.4 Transport
Axial flow fan types AZN and AZW are
delivered packed in boxes suitable for
further transport.
Lifting and transport must be done with
care, as the fans are vulnerable to
vibrations and shocks which can result
in imbalance and deformations. Check
the blade clearance and fan before
continuing with installation.
Further transport of the fan is done with
the rotor placed downwards or with the
fan casing in a vertical position using a
strap around the casing.
3. Storage
The AZN and AZW fans withstand
outdoor storage for 1 month provided
the packing is intact. Unprotected fans,
i.e. with no or broken packing, must be
stored in sheltered locations.
The storage period may be extended to
6 months, if the fans are stored indoors in
well-ventilated conditions and without
risk of condensation. The storage
location must be vibrations-free, which
can damage the motor bearings.
Prolonged storage can affect the ability
of the rotor to rotate freely. It must
therefore be turned regularly by hand
and especially for storage periods
exceeding 3 months.
4. Installation
4.1 Preparing for installation
To ensure a safe work environment and
fan functionality, make sure of the
following.
Checklist prior to installation
• The rotor must rotate freely in the
fan casing and have equal blade tip
distances to the casing around the
circumference.
• Remove any potential hazards for
explosions in the installation area.
• Secure the installation location to at
least IP20, i.e. protect it against
foreign particles with wire guards
and filters in front and after the fan.
• Duct installation, i.e. connection of
the fan using the flanges cannot be
considered completely air tight or
leak proof. If the inside of the AZN
ATEX fan casing is a Zone 1
atmosphere, the outside is Zone 2
with matching requirements for
installed equipment.
• Avoid static electricity by
grounding the fan during
installation. For instance by
assembly on non-conducting
vibration dampers and
foundations.
4.2 Installation
Handle the fan carefully and place it in
accordance with the airflow direction
arrow on the fan casing.
It is recommended to install the fans on
support frames, which are available as
optional extras. It may also be
suspended in the casing flanges or using
special carriers.
The air inlet and outlet must be kept free
from all sides to avoid risk of stalling and
to achieve optimal performance.
Minimum distances required for
undisturbed airflow are described in
section “4.4 Duct connection”.
Duct installations should be without
bends before and after the fans for at
least three fan diameter (D) lengths. See
figure 6.
When the fan is in position and secured,
make sure the rotor rotates freely.
4.3 Support frame for AZN
The support frame consists of two
mounting plates (see figure 2 item 01).
Two stiffeners (item 02) are mounted
between the plates with screws M10x20.
Field value
Meaning
CE
European Conformity
Ex mark, comply with 2014/34/EU
II
Equipment group, Surface Industry
2
Equipment category, for use in zone 1
(gases) or zone 21 (dust)
G / D
Type of hazard, gaseous or dust filled
atmospheres
c
Safety design, protection by construc-
tional safety
Ex
Explosive atmospheres
de
Flameproof enclosure and increased
safety
tb
Motor protection by enclosure
IIC
Apparatus group with most easily
ignited hazards (hydrogen)
IIIC
Conductive dust
T4
Maximum surface temperature, gas
explosion protected atmospheres,
135 ºC
T135
Maximum surface temperature, dust
explosion protected atmospheres
Table 1.
ATEX marking
Figure 1.
Lifting the fan with a strap
Motor size
-71
-80
-90
-100
Weight [kg]
35
46
Motor size
-112
-132
-160
-180
Weight [kg]
60
99
197
240
Motor size
-200
-225
-250
-280
Weight [kg]
260
400
650
700
Table 4.
Max. motor weights
Important:
Motors with drain holes,
require the fans to be
positioned so that the
holes point downwards
at the lowest point.
Important:
The support frame must
be grounded to prevent
electrical shocks.
