Novenco A/S
Industrivej 22
Tel. +45 70 12 42 22
DK-4700 Naestved
Fax +45 55 75 65 50
www.novencogroup.com
4
In dismounting and disassembling the fan
be careful not to expose the individual
parts to shocks etc. likely to damage the
motor bearings or other fan components.
6.6 Mounting of motor
After servicing remount the motor; see that
the motor flange (fig.8, item 02) is correctly
located and that the motor shaft is
concentrically placed in the fan casing
before tightening the bolts (item 06).
Mount the impeller (item 07) on the motor
shaft by means of a tool fastened in the
threaded hole of the motor shaft. Fix the
impeller hub to rest against the motor shaft
collar. Check that the blade clearan-
ce is the same throughout the
circumference of the casing. If this is not the
case, adjust the motor location in the
suspension arrangement.
Now mount the centre screw (item 09) and
centre disc (item 08). Replace lock washers
and lock nuts during fan assembly. Finally,
connect the motor cable in the terminal box
(item 01) and any ducts and downstream
guide vane arrangement (item 13).
To start the fan follow the procedure
described in section 5 (Start of operation).
6.7 Blade pitch adjustment
The blade pitch has been adjusted in the
factory with a special tool (fixture) to
deliver the performance required by the
customer/order on delivery.
If the fan performance is required to be
changed it is possible to change the blade
pitch. It requires knowledge of the motor
load and the max. permissible blade pitch
on the graph as related to the motor rating
(in case of blade pitch increase).
Contact Novenco before any such
adjustment of the blade pitch.
Novenco can supply special tools for blade
pitch adjustment and instructions for
impeller balancing.
The brochure "Blade-angle tool" is
available on request.
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 cut out
– Wrong direction of rotation of impeller.
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 break-down - repair failures,
see "Deficiency in performance".
7. Sound
The sound generation of the fans depends
on installation and operating conditions,
which means that no general data of the
sound generation can be given.
Reference is made to our catalogues or
computer programs for calculation of the
specific sound generation.
8. Attestation of
conformity
EU - Attestation of Conformity
Novenco A/S
Industrivej 22
DK-4700 Naestved
Hereby declares that axial flow fans types
ACP 250-1600 and ACG 250-1600 have
been manufactured in conformity with the
Council's directive 2006/42/EC regarding
mutual approximation of the machinery
laws (the Machinery Directive) of the
member states.
Directives
– EC Machinery Directive 2006/42/EC
– EMC Directive 2004/108/EC
– Low Voltage Directive 2006/42/EC
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 60204-1: Safety of machinery -
Electrical equipment of
machines Part 1 :
General Requirements
It is a condition that Novenco's instructions
for installation have been followed.
Naestved, 1. 11. 2010
Steen Hansen
R&D manager
Novenco A/S
