4
Novenco A/S
Industrivej 22
Tel. 70 12 42 22
DK-4700 Naestved
Fax 55 75 65 50
www.novencogroup.com
will disappear after cleaning. Should this
not be the case, technical assistance should
be called in immediately as continued
vibration will shorten the service life of the
blades and motor bearings.
6.4 Motor
Normally, only the motor bearings require
maintenance. This should be performed as
described in the maintenance instructions
for electric motors.
6.5 Detaching the motor
Before detaching the motor, disconnect the
power supply and motor cable. Next,
detach any ducts and outlet guide vane (fig.
8 pos. 13, 10, 11, and 14) on the fan outlet
side.
Remove the impeller centre screw (pos. 09)
and centre disc (pos. 08).
Detach the impeller using a puller secured
in the two threaded puller holes in the hub
boss (pos. 12).
Loosen the screws in the motor shell (pos.
05 and 06). The motor (pos. 01) and motor
flange (pos. 02) can then be detached.
When dismantling the fan, be careful not to
expose individual parts to impacts or other
forces that might damage the motor
bearings or fan parts.
6.6 Fitting the motor
After servicing is complete the motor must
be refitted. Check that the motor flange (fig.
8 pos. 02) is correctly positioned and that
the motor shaft is concentrically positioned
in the fan housing before tightening the
bolts (pos. 06).
Refit the impeller (pos. 07) on the motor
shaft by means of a puller secured in the
threaded hole on the motor shaft. Tighten
the impeller hub against the motor shaft
collar. Check that blade clearance is equal
around the entire circumference of the
housing. If this is not the case, adjust the
motor position in the suspension system.
Now fit the centre screw (pos. 09) and centre
disc (pos. 08). It is recommended that lock
washers and lock nuts be replaced when
reassembling the fan. Finally, connect the
motor cable in the terminal box (pos. 01)
and any ducts and outlet guide vane (pos.
13).
To restart the fan, follow the procedure
described in section 5: Start-up.
6.7 Blade pitch adjustment
The blade pitch is factory adjusted using a
special tool (fixture) to provide the output
required by the customer/order on
delivery.
If a different output is required, it is possible
to alter blade pitch. This requires
knowledge of the motor load and the max.
permissible blade pitch in relation to the
motor rating (in case of blade pitch
increase).
Please contact Novenco before any such
adjustment of blade pitch. Special tools for
blade pitch adjustment and instructions for
impeller balancing are available from
Novenco.
A brochure describing the blade pitch tool
and its use is available on request.
6.8 Fault finding
Possible operating faults are described in
the following.
Insufficient output:
Blocked air supply on the inlet side:
• Damper closed
• Duct blocked
• Supply fan, if any, stopped
• Motor defective
• Motor cut out
• Incorrect direction of impeller rotation
Noise/vibration:
• Bearings in electric motor defective
• Impeller out of balance
• Impeller worn/damaged
• Bolts/components loose
• Impeller blades have different pitch
• Fan operating in "stall" mode – this
may damage the system and should be
remedied immediately, see
"Insufficient output".
7. Testing functionality
and operational
readiness
To maintain their fire approval, ACP and
ACG Smoke fans must be tested every three
months with respect to functionality and
operational readiness.
If ACP and ACG Smoke fans are also used
for ventilation purposes, such tests need
only be performed at six-month intervals
provided the fan is started at least once a
day by means of a time switch or carbon
monoxide sensor.
7.1 Periodic inspection
Novax fume fans must always be
maintained in proper operating condition.
To ensure satisfactory operation and long
service life, the fans should be inspected
every six months.
Such inspection should include the
following:
• Measurement of power consumption
• Measurement of fan housing vibration
• Control of fixation bolt torque and, if
necessary, readjustment
• Visual inspection of impeller, housing
and wiring
• Cleaning:
– Use compressed air to clean the
inside
– Use water to clean the outside
It is recommended that a log be kept of all
values and observations.
8. Sound
The sound generated by the fans depends
on installation and operating conditions,
and general data on sound generation is
therefore unavailable.
For further details, please refer to our
catalogue material or computer programs
designed to calculate specific sound
emissions.
9. EU declaration of
conformity
Novenco A/S
Industrivej 22
DK-4700 Naestved
hereby declares that ACP Smoke 400-1600
and ACG Smoke 400-1600 axial flow fans
have been manufactured in conformity
with Council Directive 2006/42/EC on the
approximation of the laws of the member
states relating to machinery (the Machinery
Directive).
Directives
– EC Machinery Directive 2006/42/EC
– EMC Directive 2004/108/EC)
– Low Voltage Directive 2006/95/EC
Applied standards
EN ISO 12100-1: Safety of machinery -
Part 1
EN 12100-2:
Safety of machinery -
Part 2
EN 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 installation
instructions have been followed.
Naestved, 1.11.2010
Steen Hansen
R&D manager
Novenco A/S
