8
ZerAx
®
axial flow fan types AZL-AZN-AZW
Lack in performance
• Inlets blocked
• Outlets blocked
• Dampers blocked
• Supply air reduced
• Motors defective
• Motors disconnected
• Wrong fan rotation direction
Noises and vibrations
• Motor bearings defective
• Rotors out of balance
• Rotors damaged or worn
• Bolts or components loose
• Wrong rotor blade pitch angles
8. Inspection and test
It is recommended to test and inspect the
fans at regular intervals with regard to
operability and operation conditions.
Inspect the fans twice a year to ensure
satisfactory function and long life.
Extent of inspection
• Measure power consumption
• Verify torques of fixation bolts
• Cleaning
- inside with pressurised air
- outside with a lint-free cloth with
a mild soapy water solution
• Visual inspection
- Rotors
- Fan casings
- Electric connections
Enter all values and observations in a
log.
9. Sound
The sound emissions depend on the
installation and operation conditions,
hence no general data can be given.
Refer to the fan specifications from the
AirBox calculation program for specific
emissions and to the product catalogue
for more general data.
10. Safety
The installation must be in accordance to
Novenco’s, the current and the local
safety regulations. At a minimum these
include EN 13850.
It is recommended to review and revise
safety procedures regularly.
Safety check
• Test if safety procedures and the
installation work correctly.
• Check if safety regulations have
been changed and if the installation
should be revised.
• Consider additional measures to
improve the safety of the
installation.
11. Reference documentation
Please refer to the below documents for
further information about the fans.
• Catalogue
ZerAx axial flow fans standard,
ATEX and EX
• Novenco configuration user guide
Frequency converter Danfoss
FC101
• Technical specifications
12. Disposal
Dispose of fans suitable for scrapping in
environmentally safe ways.
Pure metal and plastic parts can be
delivered for recycling directly. Motors
containing oil and heavy metals, and
panels with insulation must be treated as
environmentally unsafe scrap.
13. Patents and trademarks
Novenco
®
,
,
and
are
registered trademarks of Novenco
Marine & Offshore A/S.
AirBox™ and NovAx™ are trademarks
of Novenco Building & Industry A/S.
The ZerAx
®
processes of manufacture,
technologies and designs are patented
by Novenco A/S or Novenco Building &
Industry A/S.
Pending patents include Brazil no. BR-
11-2012-008607-3, BR-11-2012-008543-3,
BR-11-2012-008545-0, BR-11-2014-
002282-8 and BR-11-2014-002426-0;
Canada no. 2.843.131 and 2.843.132; EU
no. 12740606.4 and 12740612.2; India no.
4140/CHENP/2012, 4077/CHENP/
2012, 821/CHENP/2014 and 825/
CHENP/2014; PCT no. EP2012/064908
and EP2012/064928; South Korea no. 10-
2012-7012252 and 10-2012-7012154.
Granted patents include Canada no.
2.777.140, 2.777.141 and 2.777.144; China
no. ZL2010800458842,
ZL2010800460965, ZL2010800464275
and ZL2012800387210; EU no. 2488759,
2488760 and 2488761; India no. 312464;
South Korea no. 10-1907239, 10-1933724
and 10-1980600; US no. 8.967.983,
9.200.641, 9.273.696 B2, 9.683.577 and
9.926.943 B2. Granted designs include
Brazil no. BR-30-2012-003932-0; Canada
no. 146333; China no. 1514732, 1517779,
1515003, 1555664 and 2312963; EU no.
001622945-0001 to 001622945-0009 and
001985391 - 0001; India no. 246293; South
Korea no. 30-0735804; US no. D665895S,
D683840S, D692119S, D704323S,
D712023S, D743018S, D755363S,
D756500S, D821560S and D823452S.
Other trademarks in this document are
the property of their respective owners.
This document is provided ’as is’.
Novenco Building & Industry A/S
reserves the right to changes without
further notice due to continuous product
development.
Copyright © 2009 - 2019,
Novenco Building & Industry A/S.
All rights are reserved.
14. Quality management
Novenco Building & Industry A/S is
ISO 9001 and 14001 certified. All fans are
inspected and tested in the production.
15. Warranty
Novenco Building & Industry A/S
provides in accordance to the law a
standard 12 months warranty from the
product leaves the factory. The warranty
covers materials and defects from the
manufacture. Wear parts are outside the
warranty scope.
Extended warranty can be agreed upon.
15.1Rotor weldings
First generation ZerAx fans have the
rotor blades welded onto the hubs. The
weldings may look uneven or have small
pores, which is due to the use of robot-
welding. The production method is
verified by high-speed tests, which
confirm the maximum allowable speed
with a large safety margin. The
appearance of the weldings has no
impact on rotor strength and should not
be reported as a quality issue. It will not
be accepted as a basis for a warranty
case.
Figure 13.
Rotor weldings
