5
6.8 Fault localization
These are likely causes of breakdowns/
failures:
Deficiency in performance:
•Blocked air supply to the fan inlet side:
– Damper closed
– Duct choked
– Supply fan, if any, stopped
– Motor defective
– Motor disconnected
• Wrong direction of rotation of impel-
ler
Noise/vibrations:
• Bearings in electric motor defective
• Impeller out of balance
• Impeller worn/damaged
• Bolts/components loose
• Impeller blades have different pitch
angles
• Fan operates in the stalling area. May
result in breakdown. Repair failures,
see “Deficiency in performance”.
7. Test of operability and
operating condition
ACN-smoke approved for smoke con-
trol must be tested four times a year as to
operability and operating condition.
If smoke exhaust fans type ACN-smoke
are used for standard ventilation as well,
a test every six months is sufficient if the
regular starts of the fans ensure at least
one start a day - as a result of connection
to a time switch or carbon monoxide
alarm.
7.1 Periodic inspection
Novax smoke exhaust fans must always
be kept in operational and perfect condi-
tion by the user. The fans should be in-
spected twice a year to ensure a satisfac-
tory function and long life.
The inspection must include:
• Measuring of power consumption
• Measuring of vibrations on fan casing
• Check of torque for fixing bolts and –
correction of it, if necessary.
• Visual inspection of impeller, fan cas-
ing, and connection to the electricity
supply
• Cleaning:
– inside with pressure air
– outside with water
It is recommended to enter all values and
observations in a log.
8. Sound
The sound generation of the fans de-
pends on installation and operating con-
ditions, which means that no general da-
ta of the sound generation can be given.
Reference is made to our catalogues or
computer programs for calculation of
the specific sound generation.
9. Attestation of conform-
ity
EU – Attestation of Conformity
The Machinery Directive 2006/42/EC,
part 2, A
Novenco A/S
Industrivej 22
DK-4700 Naestved
Hereby declares that axial flow fans type
ACN-smoke 400-1600 have been manu-
factured in conformity with the Coun-
cil's directives
2006/42/EC regarding mutual approxi-
mation of the machinery laws (the Ma-
chinery Directive) of the member states.
Applied standards:
EN ISO 12100-1: Safety of machinery
part 1
EN ISO 12100-2: Safety of machinery
part 2
EN ISO 13857: Safety of machinery -
Safety distances
EN 12101-3:
Smoke and heat control
systems - Part 3, class 1
EN 60204-1: Safety of machinery -
Electrical equipment of
machines Part 1:
General Requirements
It is a condition that Novenco's instruc-
tions for installation have been followed.
Naestved, 01.06.2010
Steen Hansen
R&D Manager
Novenco A/S
Figure 6. Electric connection through fan casing to external terminal box
External terminal box
External terminal box
Electric cable/
Electric cable/
Flexible metallic conduit
Flexible metallic conduit
Metal
Metal
cable gland
cable gland
(relief)
(relief)
Nut
Nut
Novenco A/S
Industrivej 22
Tel. (+45) 70 12 42 22
DK-4700 Naestved Fax (+45) 55 75 65 50
Denmark
www.novencogroup.com
