MU15797 0619
1
927264-0
GB
Contents
NovAx™ axial flow fan types ACN-ACW ATEX and ACW EX
Installation and maintenance
1.
Application
2.
Handling
2.1 Markings
2.2 Weight
2.3 Design conditions
2.4 Transport and lifting
3.
Storage
4.
Installation
4.1 Preparations
4.2 Installation
4.3 Support frames
4.4 Wire guard installation
4.5 Connection to duct
4.6 Electric connection
5.
Start of operation
5.1 Before startup
5.2 Motors with Y/
Δ
-start
5.3 Startup procedure
6.
Maintenance
6.1 Before maintenance
6.2 Cleaning
6.3 Vibration levels
6.4 Fan casings
6.5 Rotors
6.6 Motor maintenance
6.7 Dismount of motor
6.8 Mount of motor
6.9 Blade angle adjustment
7.
Troubleshooting
8.
Inspection and test
9.
Sound
10. Safety
11. Reference documentation
12. Patents and trademarks
13. Quality management
14. Warranty
15. Spare parts
16. Classifications
17. Declaration of conformity for
ACN ATEX and ACW ATEX
18. Declaration of conformity for
ACN EX and ACW EX
Appendices
A. Fan weights
B.
4-pole motor weights
C. Drawing – fan assembly
D. Wiring – motors up to 16 A
E.
Wiring – motors over 16 A
1. Application
The axial flow fan types ACN-ACW
ATEX and ACW EX are fans for duct
installation. ATEX fans are category 2G/
D equipment for land environments. EX
fans are non-sparking fans for marine
use.
The fans are produced in accordance
with the current directives and
guidelines for ATEX and EX equipment.
For ATEX fans this includes the directive
ATEX 2014/34/EU, with further
approval for use in conformity with EU/
99/92 ATEX 137.
For EX fans this includes the IACS
guideline F29:2005.
The intended use of ATEX fans
excludes environments
characterised by anyone of the
following conditions; adiabatic
compression and shock waves,
lightning, electromagnetic waves,
ionising radiation and ultrasound.
2. Handling
Do not expose fans and motor
parts to shocks that can result in
imbalance and deformations.
Motor bearings and fan components
are vulnerable parts.
2.1 Markings
The ACN-ACW ATEX and ACW EX
have nameplates on the fans and motors.
Fan nameplate information
• Manufacturer information
• Product type, e.g. ACN 900/330
• Serial no.
• Fan speed
• Year of manufacture
• Weight
• Design conditions (ATEX only)
Motor nameplate information
• Manufacturer information
• Power consumption and efficiency
• Voltages
• RPMs
• Weight
• Terminal connections
• Lubrication and service info.
• EX classification
Verify that the fan markings
correspond to the intended use,
e.g. correct zone, inlet
temperature or gas group.
2.2 Weight
The total weight depends on the fan size,
casing thickness, motor size and
accessories.
Refer to the Airbox program for further
information and weights of specific fan
solutions. See table 7 on page 9 for max.
weights of 4-pole motors.
2.3 Design conditions
The markings on the fan
nameplate determine the fan
suitability and override the
markings on the motor and terminal
box.
The ACN-ACW ATEX fans are designed
and approved for specific operational
conditions.
The drive motor and terminal box on the
fan have separate ATEX markings,
which may differ from the fan markings.
The ACN-ACW ATEX fans are marked
“CE
II 2G c Ex de IIC T4” or
“CE
II 2D c Ex tb IIIC T135”.
The ACW EX fans are designed
according to the guideline IACS
F29:2005 for non-sparking fans.
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 constructional
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 explo-
sion protected atmospheres, 135 ºC
T135
Maximum surface temperature, dust
explosion protected atmospheres
Table 1.
ATEX markings
