6
Noise and vibrations
• Bearings in electric motor defective
• Rotor out of balance
• Rotor worn/damaged
• Bolts/components loose
Fans operating in the stalling area, may
result in breakdowns.
7. Inspection and test
Exhaust fans must always be kept
operational and in perfect condition. The
fans should be inspected twice a year to
ensure a satisfactory function and long
life.
Extent of inspection
• Measuring of power consumption
• Check of torque for fixing bolts and
– correction of it, if necessary.
• Cleaning
- inside with pressure air
- outside with water
• Visual inspection of rotor, fan
casing, and connection to the
electricity supply
It is recommended to enter all values and
observations in a log.
8. Sound
The sound emission of the fans depends
on installation and operating conditions,
hence no general data can be given.
Refer to the AirBox calculation program
for specific emissions and to the product
catalogue for more general data.
9. Safety
The ZerAx axial flow fans must be
installed according to current and 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
installation work correctly.
• Check if safety regulations have
been changed and if the installation
needs revising.
10. Trademarks, patents and copy-
right
Novenco
®
,
,
and
are
registered trademarks of Novenco A/S
or Novenco Marine & Offshore A/S.
ZerAx
®
is a registered trademark of
Novenco A/S or Novenco Building &
Industry A/S.
AirBox™ and NovAx™ are trademarks
of Novenco Building & Industry A/S.
The ZerAx
®
manufacturing processes,
technologies and designs are patented
by Novenco 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. 2.777.140,
2.843.131 and 2.843.132; China no.
2012280037965.7; EU no. 10778838.2,
12740606.4 and 12740612.2; India no.
4140/CHENP/2012, 4077/CHENP/
2012, 4073/CHENP/2012, 821/
CHENP/2014 and 825/CHENP/2014;
PCT no. EP2012/064908 and EP2012/
064928; South Korea no. 10-2012-
7012252, 10-2012-7012154, 10-2012-
7012155, 10-2014-7005746 and 10-2014-
7003829; and US no. 14/234.654.
Pending designs include US no. 29/
541.418 and 29/541.422.
Granted patents include Canada no.
2.777.141 and 2.777.144; China no.
ZL2010800458842, ZL2010800460965,
ZL2010800464275 and
ZL2012800387210; EU no. 2488759 and
2488761; and US no. 8.967.983, 9.200.641,
9.273.696 B2 and 9,683,577. 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; and US no. D665895S,
D683840S, D692119S, D704323S,
D712023S, D743018S, D755363S and
D756500S.
Other trademarks appearing 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 (c) 2009 - 2018, Novenco
Building & Industry A/S.
All rights are reserved.
11. Quality and environment
Novenco Building & Industry A/S is
ISO 9001 and 14001 certified. All fans are
inspected and tested.
12. Warranty
Novenco Building & Industry A/S
provides according to law a standard 12
months warranty from the product is
sent from the factory. The warranty
covers materials and manufacturing
defects. Wear parts are not covered.
Extended warranty can be agreed upon.
13. Spare parts
Contact Novenco for information on and
ordering of spare parts.
