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Installation, Maintenance andOperations Manual for
COFIMCO G-GR Series Fans
G/GR - V2.1 - EN
February 11, 2010
AXIAL FANS FOR THE WORLD
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It is recommended that this entire manual be read very intently
beforeproceeding with installing the fan.
IMPORTANT: for installations of more than one fan, first, do
completesetup of one single fan, and only after ensuring the
perfect functioning ofthis fan (as described in manual), follow
same mounting procedure with therest of fans.
AXIAL FANS FOR THE WORLD
ATTENTION: blades of COFIMCO G-GR Series Fans, are patented
Cofimco trade-mark .The content of this manual cannot be copied,
reproduced or printed without writtenauthorization from Cofimco
S.r.l., and should a falsification occur, Cofimco S.r.l.
willprotect itself using whatever means consented by law.
Copyright c 2010 - COFIMCO S.r.l., Pombia (NO), ITALYAll right
reserved.
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Manufacturers Declaration
Manufacturer:
COFIMCO S.r.l. via A.Gramsci 62, 28050 Pombia (NO) ITALIA
Declares that:each axial fan is manufactured in such a way to be
built-in a machine or assembled
with other machineries for it to be constituted a machine in
accordance with thenormative of 98/37/CEE;
Declares also that:it is not consented to run the fan until the
fan, the equipment in which the fan mustbe built into, or of which
must become a component part of, have been declared inaccordance
with the normative of 98/37/CEE and with the national legislation
in
force.
AXIAL FANS FOR THE WORLD
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Table of Contents
Warranty iv
1 General Informations 1
2 Installation 42.1 Required tools for assembly . . . . . . . .
. . . . . . . . . . . . . . . . . 4
2.2 Fan rotation and flow direction . . . . . . . . . . . . . .
. . . . . . . . . 52.3 Inclination of blade axis . . . . . . . . .
. . . . . . . . . . . . . . . . . . 52.4 Installation procedure for
Cofimco fans with G-Series hub . . . . . . . . . 6
2.4.1 Standard hub placement to driving shaft . . . . . . . . .
. . . . . 6
2.4.2 Hub with coupling flange placement to driving shaft . . .
. . . . . 9
Disk installation to the coupling flange . . . . . . . . . . . .
. . . 10
2.4.3 Blades installation and pitch angle setting . . . . . . .
. . . . . . 11
3 Operating Instructions 14
3.1 Prior to start-up operations . . . . . . . . . . . . . . . .
. . . . . . . . . 14
3.2 Post start-up operations . . . . . . . . . . . . . . . . . .
. . . . . . . . . 14
4 Preventive Measures for Maintenance 164.1 Maintenance and
operations . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.2 Temperature range . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . 17
4.3 Possible causes of vibration . . . . . . . . . . . . . . . .
. . . . . . . . . 17
A Hub Removal 20A.1 Standard Hub . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . 20A.2 Hub with coupling flange . .
. . . . . . . . . . . . . . . . . . . . . . . . 21
B Trouble Shootings 23
C Part List 25C.1 Standard hub . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . 25C.2 Hub with coupling flange . .
. . . . . . . . . . . . . . . . . . . . . . . . 27
Contacts 29
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List of Figures
1.1 Type of fan installation . . . . . . . . . . . . . . . . . .
. . . . . . . . . 1
1.2 Identification tag format . . . . . . . . . . . . . . . . .
. . . . . . . . . . 2
1.3 Tag example 9144/08/40F/G1.0 . . . . . . . . . . . . . . . .
. . . . . . 2
2.1 Necessary tools for installing the blades . . . . . . . . .
. . . . . . . . . . 4
2.2 Blade rotating clockwise . . . . . . . . . . . . . . . . . .
. . . . . . . . . 5
2.3 Blade axes Layout . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . 5
2.4 G-Series hubs configurations . . . . . . . . . . . . . . . .
. . . . . . . . . 6
2.5 Standard hub configuration . . . . . . . . . . . . . . . . .
. . . . . . . . 6
2.6 Bolt [16] fastening order . . . . . . . . . . . . . . . . .
. . . . . . . . . . 7
2.7 Hub with cylindrical bore placement to driving shaft . . . .
. . . . . . . . 8
2.8 Hub with bushing placement to driving shaft . . . . . . . .
. . . . . . . . 8
2.9 Hub with coupling flange installation . . . . . . . . . . .
. . . . . . . . . 9
2.10 Disk installation to coupling flange . . . . . . . . . . .
. . . . . . . . . . 11
2.11 Blades installation to hub . . . . . . . . . . . . . . . .
. . . . . . . . . . 11
2.12 Blade pitch-angle setting . . . . . . . . . . . . . . . . .
. . . . . . . . . . 12
2.13 Inclinometer placement . . . . . . . . . . . . . . . . . .
. . . . . . . . . 12
2.14 Bolts fastening order [6] . . . . . . . . . . . . . . . . .
. . . . . . . . . . 13
3.1 Vibrations inspection positions . . . . . . . . . . . . . .
. . . . . . . . . . 15
A.1 Hub removal . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . 21
A.2 Hub removal . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . 22
C.1 Standard hub parts exploded . . . . . . . . . . . . . . . .
. . . . . . . . . 26
C.2 Hub with coupling flange parts exploded . . . . . . . . . .
. . . . . . . . 28
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List of Tables
2.1 Bolts [16] 8.8 Class or A4/70 torque . . . . . . . . . . . .
. . . . . . . . 7
2.2 Bushing screw torque . . . . . . . . . . . . . . . . . . . .
. . . . . . . . 9
2.3 Bushing screw torque . . . . . . . . . . . . . . . . . . . .
. . . . . . . . 10
2.4 Screw torque bolts [16] 8.8 Class - A4/80 . . . . . . . . .
. . . . . . . . . 10
2.5 Screw torque bolts [12] 8.8 Class - A4/70 . . . . . . . . .
. . . . . . . . . 13
4.1 Temperature range . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . 17
C.1 Part list standard hub (see Fig. C.1) . . . . . . . . . . .
. . . . . . . . . 25
C.2 Part list hub with coupling flange (see Fig. C.2) . . . . .
. . . . . . . . . 27
AXIAL FANS FOR THE WORLD COFIMCO G-GR Series Fans
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Warranty
COFIMCO S.r.l. guarantees that labour and all material used in
the manufacturing offans are of the highest quality.
In case of mechanical breakage within the 1st year of its
functioning or 18 monthsfrom when shipped out from our
establishments, and our inspectors ascertaining thebreakage was
caused from defective material and/or poor workmanship, the fan
willbe repaired or immediately replaced with an identical or
equivalent fan free of charge.Repairs or replacements will be
F.O.T. from our establishments and will not includetransportation
or extra labour costs.
If ascertained that some outside interference was caused to the
fan or the breakage wasprovoked by an erroneous installation and/or
manhandling, Cofimco S.r.l. will ceaseall warranty. Cost of repairs
done without consent from Cofimco S.r.l. will not beaccepted.
Under no circumstances will Cofimco S.r.l. be responsible for
consequential or inciden-tal damage, of any type, a result from
manufacturing, selling, installing or use of itsproduct.
AXIAL FANS FOR THE WORLD COFIMCO G-GR Series Fans
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Chapter 1
General Informations
COFIMCO G-GR Series Fans Description
The stationary adjustable-pitch G-Series fan is a remarkable
invention because of itssimplicity. Each hub is composed of two
disks bolted to the central flange which isanchored to the hub of
the driving shaft. Pillow blocks are inserted between the twosteel
plates to enable to fix the blade shaft. Blades are made up of an
airfoil sectionin aluminum alloy or fiberglass, fastened to a steel
shaft or fiberglass through bolting.The root of blade shaft
includes a retention pin and a regulator used to regulate
fanradius.
Air Flow
(c) G type
Air Flow
(d) GR type
Figure 1.1: Type of fan installation
The COFIMCO G-GR Series Fans are available in two different
configurations (seefigure 1.1 just as an example):
Type G: fans leaning on driving shafts. Type GR: fans suspended
on driving shafts.
AXIAL FANS FOR THE WORLD COFIMCO G-GR Series Fans
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2Description fan identification numbers
All COFIMCO fans are equipped with a tag fixed on the hub to
enable a clear and fastidentification.
The tag format is described on figure 1.2; an example of tag
format is shown on figure1.3.
F/T Fan Type (the fan is identified by a serial number): XXXXX
XX XXY XXY
Hub dimension
Hub Type
Blade Material: N: Aluminum L: Aluminum with flap F: FRP
Blade type
Number of blades
Fan Diameter (mm)
After the fan serial number there might be an extra letter, R
and/or T, that represent the reverse installation layout and the
special tip caps, respectively.
C/R COFIMCO reference number.
P.O. Purchase order number.
I Item number within the job.
A Blade pitch angle in degree.
Figure 1.2: Identification tag format
COFIMCO S.R.L. - ITALYVia A. Gramsci, 62 - 28050 POMBIA (NO)
F/T
C/R
P.O.
I
A
BLADE PAT. N 4618313HUB PAT. N 4715784
9144/08/40F/G1.0
12345/678
PO123456
E-1234
10.5
Figure 1.3: Tag example 9144/08/40F/G1.0
Tag shown in example (Fig. 1.3) refers to a fan with a diameter
of 9144 mm, made upof 8 blades, each with a fiberglass profile type
40F, hub type G of 1 m in diameter.
AXIAL FANS FOR THE WORLD COFIMCO G-GR Series Fans
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3Reference Job number 12345/678, customers purchase order
reference number PO123456,Item number within Job E1234 and blade
pitch angle 10.5.
ATTTENTION: tag referred above is just an example and does not
in any waycorrespond to any data referred to an identification tag
of any purchased fan.
ATTENTION: data shown on identification tag must always be
referred when order-ing spare parts.
Balancing
If not otherwise requested from the beginning, all Cofimco
S.r.l. fans are balanced inthe following manner:
Dynamic fan balancing, with a balance degree of G = 6.3
according to ISO 1940/1,in the case the fan is shipped out already
assembled.
For a fan dispatched disassembled, the hub and the blades are
statically balancedso that the reassembled unit correspond to a
balance degree of G = 6.3 accordingto ISO 1940/1. In this case, the
blades have the same static moment, thereforethey can be placed in
any order on the hub (the blades of the same item
areinterchangeable).
Storage
As soon as a Cofimco fan is delivered it is very important to
administer an accurateinspection in order to verify for possible
damages due to transportation. In such cases,present a claim to the
transportation company and mention on the claim the
relativedocuments accompanied, such as, bill of lading, insurance
certificates(if any), etc.
Also, as soon as fan is delivered, please insure that components
are exactly what wasordered and delivered. In a case where goods
are not in compliance with what ordered,contact Cofimco within 2
weeks of delivery.
If a fan is not immediately installed, we recommend that it be
kept in a closed dry place,and not place any heavy material
whatsoever on the blades. In the case of storage fora long period
of time, before putting the product in action, please verify the
conditionof protective layer of anti-corrosion on all surfaces
performed on machines.
AXIAL FANS FOR THE WORLD COFIMCO G-GR Series Fans
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Chapter 2
Installation
This manual refers to COFIMCO G-GR Series Fans, installation
conditions can varyin different situations.
2.1 Required tools for assembly
For assembling a fan, the following tools are required:
Dynamometric Spanner (torque wrench fig. 2.1(a)) required for
fastening thebolts to a set screw torque.
Goniometric level (inclinometer fig. 2.1(b)) required for
setting the blade pitchangle to the angle of design, following the
procedure described in this chapter. Theaccuracy of the
inclinometer must be at least 0.5 (max admissible tolerance).
(a) Torque wrench (b) Inclinometer
Figure 2.1: Necessary tools for installing the blades
Upon request COFIMCO S.r.l. has available for sale the necessary
tools for installation.
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2.2 Fan rotation and flow direction 5
2.2 Fan rotation and flow direction
The direction of fan rotation is correct when air flow moves
from pressure side to suctionside. In the example seen in figure
2.2 rotation is clockwise, seeing the side that receivesair flow;
upon request, Cofimco S.r.l. can supply fans with counterclockwise
rotation.
Axis of Rotation
Clockwise rotation
Flow Direction
Blade Axis
Figure 2.2: Blade rotating clockwise
2.3 Inclination of blade axis
Cofimco fan blades may present, with respect to the plane
perpendicular to the axis ofrotation, a small geometric angle, in
the direction from where the air flow comes from(see Fig. 2.3).
Because of this angle, the centrifugal force generates a moment
of flexure opposite tothat generated from traction, reducing stress
which the blades can be subject of. It istherefore necessary, while
installing, in the presence of this angle, that the blade axisbe
turned toward where the air flow is coming from.
Air Flow
Rotational Plane
Centrifugal ForceAxis of Rotation
Trust Moment due toCentrifugal ForceBlade Axis Inclination
Moment dueto Trust
Figure 2.3: Blade axes Layout
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2.4 Installation procedure for Cofimco fans with G-Series hub
6
2.4 Installation procedure for Cofimco fans with G-Series
hub
After ensuring that all electrical contacts have been
disconnected and that the motorcan not in any way be started
inadvertently, one can proceed with the assemblingdescribed
herewith.
Cofimco supplies two different hub types (see fig. 2.4); for
standard hub follow theinstallation section 2.4.1, for hub with
coupling flange follow the installation section2.4.2.
(a) Hub with coupling flange configuration (b) Standard hub
configuration
Figure 2.4: G-Series hubs configurations
2.4.1 Standard hub placement to driving shaft
COFIMCO supplies the G-Series standard hubs already assembled
(see fig. 2.5) withor without spacer [1B], respectively.
(a) Standard with spacer (b) Standard without spacer
Figure 2.5: Standard hub configuration
If it is necessary to fasten back the hub bolts [16], the screw
torques for standards bolts
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2.4 Installation procedure for Cofimco fans with G-Series hub
7
(8.8 class or A4/70) given on table 2.1 have to be used. The
bolts have to be fastenfollowing a diagonal order (see example of
figure 2.6 for a hub with ten bolts).
Bolt typeScrew torque
N m Lb ftM20 Cl.8.8 471.5 347.8M20 A4-70 221.7 163.5
Table 2.1: Bolts [16] 8.8 Class or A4/70 torque
ATTENTION: the bolts identification code is printed on bolts
head and included inthe documentations part list.
Figure 2.6: Bolt [16] fastening order
COFIMCO supplies two different standard hub types:
1.A) Hub with cylindrical bore: in this case the hub is directly
anchored to thedriving shaft, follow figure 2.7 for the
installation procedure.
Coat the driving shaft with a thin layer of grease. If supplied,
put the spacer [4A]in the driving shaft until it touches the
driving shafts shoulder. Fit the assembledhub through the driving
shaft until the flange touches the driving shafts shoulder(or the
spacer if supplied). The driving shaft end, when the hub is in
contact withits shoulder, should be at least 2 mm inside the hub
bore (5 mm are suggested).This to avoid fans vertical displacements
when the screw [3] is tightened. Put thenthe washer [2] on the
flange bore and fasten the screw [3] to the driving shaft.
NOTE: the washer [2] and the screw [3] are not supplied by
COFIMCO.
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2.4 Installation procedure for Cofimco fans with G-Series hub
8
(a) Standard with spacer (b) Standard without spacer
Figure 2.7: Hub with cylindrical bore placement to driving
shaft
1.B) Hub with bushing: follows figure 2.8 for the installation
procedure.
(a) Standard with spacer (b) Standard without spacer
Figure 2.8: Hub with bushing placement to driving shaft
ATTENTION: in this case the driving shaft must not be coated
withany grease.
Fit the bushing [4B] into the driving shaft until it reaches the
desired location;the driving shaft end must not be inside the
bushing. Install the hub flange tothe bushing making sure that the
screw holes of the two items are aligned. Whenaligned, fasten the
hub to the bushing with the screw torques defined on table2.2.
ATTENTION: do not start the fan with the bore screw (hub with
cylindrical
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2.4 Installation procedure for Cofimco fans with G-Series hub
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Bushing TypeScrew Torque
N m Lb ftR1 e R2 39.3 29.0S1 e S2 94.9 70.0
U0, U1, U2 190.3 140W1, W2 339.4 250QD-N 407.1 300QD-P 610.2
450
Table 2.2: Bushing screw torque
bore) or the bushing screws (hub with bushing) fasten
incorrectly.
2.4.2 Hub with coupling flange placement to driving shaft
COFIMCO supplies two flange types:
(a) Flange with cylindrical bore (b) Flange with bushing
Figure 2.9: Hub with coupling flange installation
1.A) Coupling flange with cylindrical bore: the hub is anchored
directly to thedriving shaft, for the procedure refer to figure
2.9(a)
Coat the driving shaft with a thin layer of grease. If supplied,
put the spacer [4A]in the driving shaft until it touches the
driving shafts shoulder. Fit the assembledhub through the driving
shaft until the flange touches the driving shafts shoulder(or the
spacer if supplied). The driving shaft end, when the hub is in
contact withits shoulder, should be at least 2 mm inside the hub
bore (5 mm are suggested).This to avoid fans vertical displacements
when the screw [3] is tightened. Thenput the washer [2] on the
flange bore and fasten the screw [3] to the driving shaft.
NOTE: the washer [2] and the screw [3] are not supplied by
COFIMCO.
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2.4 Installation procedure for Cofimco fans with G-Series hub
10
1.B) Coupling flange with bushing: for the procedure refers to
figure 2.9(b).
ATTENTION: in this case the driving shaft must not be coated
withany grease.
Fit the bushing [4B] into the driving shaft until it reaches the
desired location;the driving shaft end must not be inside the
bushing. Install the hub flange tothe bushing making sure that the
screw holes of the two items are aligned. Whenaligned, fasten the
hub to the bushing with the screw torques defined on table2.3.
Bushing TypeScrew torque
N m Lb ftR1 e R2 39.3 29.0S1 e S2 94.9 70.0
U0, U1, U2 190.3 140W1, W2 339.4 250QD-N 407.1 300QD-P 610.2
450
Table 2.3: Bushing screw torque
ATTENTION: do not start the fan with the bore screw (hub with
cylindricalbore) or the bushing screws (hub with bushing) fasten
incorrectly.
Disk installation to the coupling flange
COFIMCO supplies the Hub G-Series already assembled (see figure
2.10(a)).
If it is necessary to fasten back the hub bolts [16], the screw
torques for standardsbolts (8.8 class or A4/80) given on table 2.4
must be used. The bolts have to be fastenfollowing a diagonal
order(see example of figure 2.10(b) for a hub with ten bolts).
Screw TypeScrew torque
N m Lb ftM30 Cl:8.8 1633.3 1204M30 A4/80 917.4 676.6
Table 2.4: Screw torque bolts [16] 8.8 Class - A4/80
ATTENTION: the bolts identification code is printed on bolts
head and it is includedin the documentations part list.
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2.4 Installation procedure for Cofimco fans with G-Series hub
11
(a) Disk with coupling flange (b) Screw tightening order(16)
Figure 2.10: Disk installation to coupling flange
2.4.3 Blades installation and pitch angle setting
1415
13
1312
5
85
96
7
10
6
(a) Exploded view (b) Assembled view
Figure 2.11: Blades installation to hub
NOTE: it is possible to have configurations with six or four
screws [12] per pillow block.
For the blades installation procedure follow the instructions
given here referring tofigure 2.11:
1. Remove a set of pillow blocks[6] and bolts[12] from the hub;
rests the pillow blocksto blade shaft [8] paying attention that he
retention pin [9] and the gap regulator[10] do not remain between
the two pillow blocks.
2. Fit the blade shaft with the pillow blocks inside the hub
being aware the bladeorientation is as indicated on figure 2.2.
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2.4 Installation procedure for Cofimco fans with G-Series hub
12
3. Fasten the installed parts through the bolts [12] with a
screw torque capable ofsustaining the blade but that allows both
the blade rotation and blade horizontalmovements along blade main
axis.
4. Place the gap regulator to the retention pin on its less-deep
slot, pull than theblade until the gap regulator gets in contact
with the pillow blocks.
Axis of Rotation
Clockwise Rotation
Flow Direction
Blade Axis
Inclinometer
90
5 mm
Figure 2.12: Blade pitch-angle setting
5. Place the inclinometer to the blade upper part at 5 mm from
the blade ends andperpendicular to blade main axis as shown on
figure 2.12 In case of a large profile(the inclinometer length is
not enough), it is necessary to use a flat rod long enoughto reach
the blade leading and trailing edges and than lean the inclinometer
onit. See figure 2.13 for a correct placement.
Not right placement Right placement Right placement
Figure 2.13: Inclinometer placement
6. Rotate the blade until it reaches the requested pitch angle
(A) written on fanidentification tag. The maximum admissible
tolerance is 0.5.
7. Check if there is gap between the assembled part, in
particular between the gapregulator [10] and the pillow block.
Fasten the bolts [12] (using the torque wrench)following the
fastening order as shown on figure 2.14 with the screws torque
givenon table 2.5.
The bolts [12] are dependent to G-series hub and profile type
used (this data is reportedon fan identification plate)
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2.4 Installation procedure for Cofimco fans with G-Series hub
13
4 2
31
(a) Four bolts pillow blocks
5
164
3
2
(b) Six bolts pillow blocks
Figure 2.14: Bolts fastening order [6]
The screw torque depends on bolts classes, this is reported on
bolts head. For standardbolt 8.8 Class or A4/70 use the torques
given on table 2.5:
Bolt typeScrew torque
8.8 Class A4/70
N m Lb ft N m Lb ftM14 160.4 118.3 75.53 55.7M18 334.8 246.9
157.69 116.5M20 471.5 347.8 221.7 163.5
Table 2.5: Screw torque bolts [12] 8.8 Class - A4/70
Repeat the previous operations for each blade. Before starting
the pitch angle settingoperation for a new blade, turn the fan
until the new blade is located at the sameposition inside the fan
ring as the previous ones. This to compensate any slight
verticaldeviation from fan axis rotation.
ATTENTION: in case of a structure equipped with several fans,
beforesetting blade design pitch angle to all fans , set the pitch
angle on one fanonly, and follow the operating instructions of
chapter 3.
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Chapter 3
Operating Instructions
3.1 Prior to start-up operations
1. Before running the fan be aware that all the parts are well
fasten and there isno gap between the blade shaft and the hub; if
relative movements are detectedcheck the screw torques as described
on chapter 2.
2. Rotate manually the fan for at least one complete turn paying
attention that fandoes not enter in contact with the fan ring
structure.
3. Rotate the fan manually to check if the gap between the blade
tip and the fanring is in accordance with the design ratio x/D,
where x is the distance betweenthe blade tip and the fan ring and D
is the fan diameter. The gap has to bemeasured along the blade main
axis.
If the distance between the blade tip and the fan ring is not
that of design, the fandiameter could be modified fitting the
retention pin [9] in another gap regulatorslot [10].
4. Check that blade axes agree with those defined on section
2.3.
5. Check gear box oil level and belt tension to be as indicated
by the manufacturer.
6. Remove all tools from area.
7. Connect motor to power supply.
8. Start the fan for few second and then switch it off. While
the fan is still turning,check that the direction of the blade
rotation is correct as defined on section 2.2.
3.2 Post start-up operations
1. Check the power absorption, if excessive, reduce gradually
the blade pitch angleuntil the desired power absorption is reached.
If lower than expected, increase
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3.2 Post start-up operations 15
gradually the blade pitch angle until the desired power
absorption is reached.Update the new pitching angle on the fans of
the same structure.
NOTE: a pitch angle trim of few degrees, respect to that of
design, has to beconsidered normal.
ATTENTION: the power absorption varies inversely to air
temperature.
2. Check that vibration level, as in the positions shown on
figure 3.1, does not exceedthe most restrictive amplitude values
between the limits imposed by the normativeof the structure where
the fan is installed and the limit of 7 mm/s RMS (overall)measured
in the frequency range 0 : 50Hz; above 50Hz and until a
frequencyrange that include all the structure forcing frequencies,
the limit decrease to 0.5mm/s RMS (overall). In the case one of the
two limits is exceeded, shut the fandown and trace the cause of
such an excessive vibration by referring to section4.3.
ATTENTION: the vibration-limit is valid for vibrations that
occur along or-thogonal axis, hence vibration that remains constant
along those axis (it is notvalid for rotational vibrations).
Figure 3.1: Vibrations inspection positions
3. After one working hour check the fan bolts [16] screw
torque.
4. Repeat the screw torque of bolts [16] after 24 working hour
from the start-up.
AXIAL FANS FOR THE WORLD COFIMCO G-GR Series Fans
-
Chapter 4
Preventive Measures for Maintenance
4.1 Maintenance and operations
A Inspect periodically the overall fan conditions. Inspection
interval depends on fanoperating conditions and may vary from a
minimum of two weeks to a maximumof six months. During these
inspections check the following:
screw torque; corrosion of fasteners; general condition of
blades and shafts.
It may be necessary to clean the rotor blades to ensure the fan
proper balancing.
B Ice formation on the blades of operating fans must be strictly
avoided.
C The presence of ice on the blades of a still fan must be
removed prior to start-up to avoid damages. Snow formed on a still
fan must be periodically removed,according to the quantity of snow
accumulated.
D For installations with two-speed motors, when stepping down
from high speedto low speed, the motor must be turned off for a
suitable duration so that thefan rotation speed has slowed below
the low speed full RPM, before the motor isreengaged at the low
speed setting.
E If the rotation direction has to be changed, stop the fan
completely before changingthe direction.
F Check the vibration level in the positions shown in figure 3.1
at regular breaks.
G Check periodically the painted parts to seek for any damages
due to corrosion. Inparticular, inside the Cooling Towers, the
blade leading edge is subject to heavycorrosion; for the latter
case it is recommended an inspection every six months.Restore any
corrosion damages, in particular those on blade leading edge.
AXIAL FANS FOR THE WORLD COFIMCO G-GR Series Fans
-
4.2 Temperature range 17
The vibration level, as in the positions shown on figure 3.1,
does not exceed the mostrestrictive amplitude values between the
limits imposed by the normative of the struc-ture where the fan is
installed and the limit of 7 mm/s RMS (overall) measured inthe
frequency range 0 : 50Hz; above 50Hz and until a frequency range
that includeall the structure forcing frequencies, the limit
decrease to 0.5 mm/s RMS (overall). Inthe case one of the two
limits is exceeded, shut the fan down and trace the cause ofsuch an
excessive vibration by referring to section 4.3. It is suggested to
record thevibrations in order to compare it to the previous one.
For a correct comparison themeasurements have to be done always in
the same location and in the same manner.During vibration analysis
observe the standard safety procedure, in particular do notget
close to a running fan but place the transducers (accelerometer)
with a still fan andmake the measurements from a safety
location.
NOTE: the vibration level is a good indicator of the plant
conditions. It is thereforeopportune to make these measurements
frequently (e.g. once a month).
ATTENTION: the vibration-limit is valid for vibrations that
occur along orthogonalaxis, hence vibration that remains constant
along those axis (it is not valid for rotationalvibrations).
4.2 Temperature range
COFIMCO fans are designed to operate at the following
temperatures:
- 20C (-4F) with standard materials Min - 56C (-69F) with
special materials
Max
Aluminum blades: + 120C (+ 248F) Fan running + 165C (+ 329F) Fan
at rest Frp blades: + 80C (+ 176F) Fan running + 120C (+ 248F) Fan
at rest
Table 4.1: Temperature range
4.3 Possible causes of vibration
The actual causes of vibration may vary considerably, some of
the most common arethe following:
A Unbalance of one or more blades: the vibration caused by blade
imbalance occurson fan rotation plane with a frequency equal to the
fan RPM and at an amplitudelinearly dependent to the degree of
imbalance and the square of the rotationalspeed.
AXIAL FANS FOR THE WORLD COFIMCO G-GR Series Fans
-
4.3 Possible causes of vibration 18
B Blade pitch angle not included in the 0.5 tolerance: this
condition causes vi-bration outside the fan rotation plane at a
frequency equal to the fan RPM andat an amplitude which is
dependent on the square of the rotational speed.
C Blades too close to supports (periodic aerodynamic
turbulence): this condition ischaracterized by vibration outside
fan rotation plane at a frequency equal to theproduct of the number
of fan blades and RPM. The amplitude depends upon theextent of the
aerodynamic turbulence.
D Resonance between one of the possible forcing frequencies of
the fan and one ormore of the vibration modes of the structure on
which it is installed. The main forc-ing frequencies generated by
the fan, normally correspond to the following frequen-cies:
fan RPM; product of fan RPM and the number of blades; product of
fan RPM and the number of structural supports capable of gen-
erating aerodynamic turbulence (if they are arranged in an
axial-geometricmanner).
E Vibration transmitted by the structure on which the fan is
installed: the frequen-cies of such vibration depend on both the
external forcing frequencies and theresonant frequencies of the
structure.
F Resonance of the blades with one of the possible forcing
frequencies: in the vastmajority of cases the vibration occurs
outside of the blade rotation plane.
G Misalignment of the drive shaft: this generates vibration with
a frequency that isone or two times the RPM. In most cases the
vibration occurs outside the bladerotation plane.
H Loosening of blade and/or speed reducer fastening bolts: the
fan behavior underthese circumstances is totally unpredictable, as
it depends on the extent andlocation of the loosening.
I Output-shafts bearing that is worn out: this condition
generates vibration on theblade rotation plane at a frequency equal
to the rotor RPM.
J The fan and/or the structure bolts are not tightened: in this
case all the boltshave to be tightened.
K The draining holes of the blades are obstructed: it is
necessary to open them back.
L Incorrect hub installation: it is necessary to re-install the
hub as described onsection 2.4.
M Incorrect blade installation: it is necessary to unscrew the
bolts [16], pull theblades and tighten back the bolts at their
proper screw torque.
AXIAL FANS FOR THE WORLD COFIMCO G-GR Series Fans
-
4.3 Possible causes of vibration 19
ATTENTION: the amplitude of the fan vibration is determined by
the stiffness ofits support. Vibration that would not be critical
to a fan supported by a sufficientlyrigid structure is amplified by
an overly flexible support. This support stiffness mayalso cause
unexpected variations in the resonant frequencies of the
blades.
AXIAL FANS FOR THE WORLD COFIMCO G-GR Series Fans
-
Appendix A
Hub Removal
ATTENTION: before removing the hub be aware that the motor
electrical sourcesare disconnected, therefore motor will not be
able to start. On the basis of hub typeuse the next procedures.
A.1 Standard Hub
The fan hub may be extracted with or with out the blades
installed. During removaloperation the fan has to be belted in
order to avoid its fall after having removed theanchoring bolts.
Remove the screw [3] in the case of hub with cylindrical bore or
thebushing screws in the case of its presence.
The hub removal operation can be done using the the hub-G-Series
extractor (seefig.A.1), not supplied with the fan. For this
operations use the following procedurereferring to figure A.1.
1 Remove two opposite bolts [16] (see part list).
2 Place a disk [504], at least 5 mm thick and with a diameter
slightly smaller thanhub slot, between the screw [503] and the
driving shaft; this to avoid driving shaftdamages.
3 Fasten the extractor to the hub through the bolts [501] and
[502] using the slotpreviously left free.
4 Tighten the screw [503] until the hub is removed.
AXIAL FANS FOR THE WORLD COFIMCO G-GR Series Fans
-
A.2 Hub with coupling flange 21
(a) Extractor (b) Hub removal scheme
Figure A.1: Hub removal
After the hub removal the extractor has to be removed, and the
bolts [16], previouslyremoved, fasten back at their proper screw
torque. (see table 2.1).
A.2 Hub with coupling flange
The fan hub may be extracted with or with out the blades
installed. During removaloperations the fan has to be belted in
order to avoid its fall after having removed theanchoring bolts.
Remove the screw [3] in the case of hub with cylindrical bore or
thebushing screws in the case of its presence.
The hub removal operation can be done using the the hub-G-Series
extractor (seefig.A.2), not supplied with the fan.
For this operation use the following procedure refer
1 Remove two opposite bolts [16] (see part list).
2 Place a disk [504], at least 5 mm thick and with a diameter
slightly smaller thanhub slot, between the screw [503] and the
driving shaft; this to avoid driving shaftdamages.
3 Fasten the extractor to the hub through the bolts [501] and
[502] using the slotpreviously left free.
4 Tighten the screw [503] until the hub is removed.
AXIAL FANS FOR THE WORLD COFIMCO G-GR Series Fans
-
A.2 Hub with coupling flange 22
(a) Extractor (b) Hub removal scheme
Figure A.2: Hub removal
After the hub removal the extractor has to be removed, and the
bolts [16], previouslyremoved, fasten back at their proper screw
torque. (see table 2.4).
AXIAL FANS FOR THE WORLD COFIMCO G-GR Series Fans
-
Appendix B
Trouble Shootings
TROUBLE SHOOTINGS
Situation Possible Causes Possible Solutions System congestion.
Clean the entire system
Check the real obstacles area and the inlet shape towards the
original design.
Obstacles to the air flow. In dry-coolers the minimum free
height of the inlet area has to be 1 time the fan diameter at
least; this height has to be higher in the case of multiple units
in line.
Static pressure higher than specified one .
Increase blade pitch angle (till 3 deg. after having checked the
data sheet selection).
Blade pitch angle changed. (e. g. bolts [12] not tightened at
the right torque).
Set the right pitch angle and refer to the operation manual to
set the right torque of screws and bolts.
Low Air Flow Low Power Absorption
Temperature higher than that of design.
Increase blade pitch angle (till 3 deg. after having checked the
data sheet selection).
AXIAL FANS FOR THE WORLD COFIMCO G-GR Series Fans
-
24
Situation Possible Causes Possible Solutions
Temperature lower than that of design.
Decrease the blade pitch angle (till 3 deg. after have checked
the data sheet selection). High power absorption
Static Pressure lower than that of design.
Decrease the blade pitch angle (till 3 deg. after have checked
the data sheet selection).
Screws and bolts of the fan and/or the structure loosened.
Torque all screws and bolts. Rubbing between the blades
and the fan ring Fan not centered. Tip clearance too small.
Center the fan. Increase the fan ring diameter.
Scratch or little damages Contact Cofimco. Thin crack on a blade
surface Contact Cofimco.
Unbalance of one or more blades. Contact Cofimco.
Blade pitch angle not included in the 0.5 deg. tolerance. Set
right blade pitch angle.
Blades too close to the supports (periodic aerodynamic
turbulence).
Contact Cofimco.
Resonance between one of the possible fan forcing frequencies
and one or more of the vibration modes of the structure on which it
is installed.
Contact Cofimco.
Vibration transmitted by the structure on which the fan is
installed.
Contact Cofimco.
Resonance of the blades with one of the possible forcing
frequencies.
Contact Cofimco.
Misalignment of the drive shaft. Realign the drive shaft. Worn
output shaft bearing Contact the supplier. The fan and/or the
structure bolts are not tightened
Tighten screws and bolts at the right torque.
High vibration level
The draining holes of the blades are obstructed Open the
draining holes.
In case of any problem contact COFIMCO S.r.l. specifying the
order number indicatedon the fan identification plate.
AXIAL FANS FOR THE WORLD COFIMCO G-GR Series Fans
-
Appendix C
Part List
On the basis of hub type the part list is given.
ATTENTION: the part list refers to a standard G-Series fan, for
special applicationthe actual part list is that included with the
fan documentation.
C.1 Standard hub
Part List Item Description Item Description 1A Hub boss 10 Gap
ring regulator 1B Spacer (if supplied) 11 Shaft cap (if supplied) 2
Washer (not supplied by cofimco) 12 Screw 3 Screw (not supplied by
cofimco) 13 Washer 4A Spacer (if supplied) 14 Lock washer 4B
Bushing (if supplied) 15 Nut 5 Hub disk 16 Screw 6 Pillow block 17
Washer 7 Blade 18 Lock washer 8 Blade shaft 19 Nut 9 Retention
pin
Cofimco G-GR series fan standard hub components
Table C.1: Part list standard hub (see Fig. C.1)
AXIAL FANS FOR THE WORLD COFIMCO G-GR Series Fans
-
C.1 Standard hub 26
Figure C.1: Standard hub parts exploded
AXIAL FANS FOR THE WORLD COFIMCO G-GR Series Fans
-
C.2 Hub with coupling flange 27
C.2 Hub with coupling flange
Part List Item Description Item Description 1A Hub boss 11 Shaft
cap (if supplied) 1B Spacer (if supplied) 12 Screw 2 Washer (not
supplied by cofimco) 13 Washer 3 Screw (not supplied by cofimco) 14
Lock washer 4A Spacer (if supplied) 15 Nut 4B Bushing (if supplied)
16 Screw 5 Hub disk 17 Washer 6 Pillow block 18 Lock washer 7 Blade
19 Nut 8 Blade shaft 20 Screw 9 Retention pin 21 Lock washer 10 Gap
ring regulator 22 Washer
Cofimco G-GR series fan hub with coupling flange components
Table C.2: Part list hub with coupling flange (see Fig. C.2)
AXIAL FANS FOR THE WORLD COFIMCO G-GR Series Fans
-
C.2 Hub with coupling flange 28
Figure C.2: Hub with coupling flange parts exploded
AXIAL FANS FOR THE WORLD COFIMCO G-GR Series Fans
-
Contacts
AXIAL FANS FOR THE WORLD
COFIMCO S.r.l.Via A. Gramsci, 62
28050 Pombia (NO)Italy
Tel. +39 0321/968311Fax. +39 0321/958992
[email protected]://www.cofimco.com
-
6096/05/33F/G1.5T
CUSTOMERORDER NO.PROJECT/ITEMFAN MODEL
DATE12/06/13SCALE
- / -
DRAWING NO.
GA-36609-1-ENG
REV.
1
GENERAL ASSY DRAWING
COFIMCO REF. 36609/553mm [X]inches[]
THIS DRAWING IS PROPERTY OF COFIMCO SRL ANY RIGHT IS RESERVED
ACCORDING TO THE LAW.
COFIMCO SRL - VIA GRAMSCI, 62 28050 POMBIA (NO) ITALY - PH. +39
0321968311 - FAX +39 0321958992 - [email protected] FANS FOR
THE WORLD
GA-G-B10-1_H.emf
ESINDUS S.A.5x6029-07 rev.0
ARBRAT
0 5 10 15 20PITCH ANGLE
95 48 66
124
49 90
152
54 114
179 61 137
204 70 159
228 80 180
BT 59 62 68 76 86 96
25 PROFILE TYPEBLADE NO.
HUB TYPEINSTALLATIONWEIGHTINERTIA 2290 kgm2
kg638STANDARDG1.5
533F
DIAMETER 6096
SPECIAL TIP CAPSSECTION A-A
DESIGN
10.5
PITCH
ANGLE
CLOCKWISE ROTATIONFACING AIR FLOW
6096
ARBR
AIR FLOW DIRECTION
ATBT
BOLT M20X170 UNI 5737 TORQUE SETTING (Nm) 249
BOLT M20X170 UNI 5737 TORQUE SETTING (Nm) 249
SPACER RING TBD
1500
230
1702
20
290
172
1500
TBD
-
COFIMCO S.R.L. - VIA GRAMSCI, 62 - 28050 POMBIA (NO) - ITALY
TEL +39-0321-968311 FAX +39-0321-958992
COFIMCO Srl Via A. Gramsci, 62
28050 Pombia (NO) Italy
Dichiariamo, in riferimento alla applicazione della
Direttiva Macchine 2006/42/CE, che i ventilatori
industriali e gruppi di trasmissione
We declare, with reference to Machine Directive
2006/42/CE, that Industrial Fans and transmission
devices
Cliente
Customer ESINDUS, S.A.
Particolare: Fan model 6096/05/33F/G1.5T
Rif. Cofimco
Cofimco ref. 36609/553
Part No:
Ordine Cliente
Customer P.O. 5x6029-07 REV.0
Fornitura:
Supplied items:
Blades type BL/6096/33F/G1.5T
Hubs type HB/05/75/G1.5
in oggetto sono forniti non assemblati, e devono quindi
essere considerati come componenti separati e non
come assiemi.
Pertanto la Dichiarazione CE di conformit ai sensi della
2006/42/CE non applicabile n richiesta.
above mentioned, are supplied disassembled and must
therefore be considered as separate components and
not as assemblies.
Therefore, the EC declaration of conformity in
accordance with 2006/42/EC is not applicable neither
requested.
Pombia (NO), 12/06/2013
Ing. Nicola Romano
Engineering Manager
-
IOPRO002 Rev. 0 del 05-06-2007
Pag. 1 di 2
Organizzazione :
BLADE STATIC BALANCING - ENGLISH TRANSLATION FOR INFORMATION
ONLY OFFICIAL VERSION IN ITALIAN
Rif. PGPRO001
Ref. Normative: ISO 1940. THE FAN BALANCING IS PERFORMED IN THE
FOLLOWING WAYS : STATICAL : FANS WITH DIAMETER HIGHER THAN 1800 mm
BLADES WITH LENGHT HIGHER THAN 800 mm DYNAMICAL : FANS WITH
DIAMETER LOWER THAN 1800 mm BLADES WITH LENGHT LOWER THAN 800 mm
FOREWORD : ON THE FIRST BLADE THAT IS PRODUCED, OR ON THE MASTER
BLADE, A WEIGHT BETWEEN 200 AND 600 g IS ADDED, THIS TO BE SURE
THAT THE BALANCING OF THE FOLLOWING BLADES WILL BE DONE BY WEIGHT
ADDITION AND NEVER BY WEIGHT REMOVAL. STATIC BALANCING PERFORMED
WITH ELECTRONIC BALANCING MACHINE:
1- INSTALL THE FIRST BLADE THAT IS PRODUCED, OR THE MASTER
BLADE, ON THE BALANCING MACHINE 2- SET THE ZERO 3- READ THE
PRODUCTION SPECIFICATION AND PUT ON THE BLADE END A CALIBRATED
WEIGHT EQUAL (OR ROUNDED OF BY
DEFECT) TO THE MAXIMUM ADMITTED UNBALANCING 4- READ THE VALUE
INDICATED BY THE BALANCING MACHINE (THIS IS THE MAXIMUM ADMITTED
UNBALANCING) 5- REMOVE THE MASTER BLADE AND INSTALL THE BLADE TO BE
BALANCED 6- ADD BALANCING WEIGHT TILL THE READ VALUE IS INCLUDED IN
THE VALUE READ WITH MASTER BLADE AND SAMPLE WEIGHT
STATIC BALANCING PERFORMED WITH MECHANICAL BALANCING
MACHINE:
1- INSTALL THE FIRST BLADE THAT IS PRODUCED OR THE MASTER BLADE
ON THE BALANCING MACHINE 2- ADD WEIGHT USING THE TOOLS PRESCRIBED
BY THE PRODUCION SPECIFICATION (ROD AND TRAY) TILL TO REACH THE
BALANCE
POINT 3- SET THE ZERO 4- READ THE PRODUCTION SPECIFICATION AND
PUT ON THE BLADE END A CALIBRATED WEIGHT EQUAL (OR ROUNDED OF
BY
DEFECT) TO THE MAXIMUM ADMITTED UNBALANCING 5- READ THE VALUE
INDICATED BY THE BALANCING MACHINE (THIS IS THE MAXIMUM ADMITTED
UNBALANCING)
-
IOPRO002 Rev. 0 del 05-06-2007
Pag. 2 di 2
Organizzazione :
BLADE STATIC BALANCING - ENGLISH TRANSLATION FOR INFORMATION
ONLY OFFICIAL VERSION IN ITALIAN
Rif. PGPRO001
6- REMOVE THE MASTER BLADE AND INSTALL THE BLADE TO BE BALANCED
7- ADD BALANCING WEIGHT TILL THE READ VALUE IS INCLUDED IN THE
VALUE READ WITH MASTER BLADE AND SAMPLE WEIGHT
-
Storage requirements for customers
IOPRO019
Rev. 00
21/09/2010 Pag. 1 of 1
Rif.: PGPRO001
Written: G. Planca Approved: QA Date: 21/09/2010
STORAGE REQUIREMENTS
All the packings that contains fan components shall be stored
preferably in indoor storage areas with
the following characteristics:
covered;
closed on all sides;
protected against flooding
free of vermin (rats, mice, insects, etc.);
with concrete or asphalt floor of adequate load-bearing
capacity;
suitable for fork lift truck;
with appropriate accessways.
For short periods the packings can be stored on covered outdoor
storage areas with the following
characteristics:
covered;
with good drainage
with surface having suffucient load-bearing capacity;
suitable for fork lift truck, truck, crane;
free of vegetation;
protected against flooding
with appropriate accessways.
The storage in areas without the above characteristics shall be
avoided.
-
Handling procedure for painted parts
IOPRO022
Rev. 00
04/02/2011 Pag. 1 of 1
Rif.: PGPRO001
Written: UT Approved: QA Date: 04/02/2010
Handling procedure for painted parts
The following rules must be observed during handling, assembling
and maintenance of
painted fans and components.
- Avoid to pile (stack) the hub disks on top of each other.
In case, put a protection element (wood, rubber, plastics,
etc.).
- Avoid the contact of any metal tool, chain, hook, sling, etc.
with the coated surfaces of
the fans components.
- Store or lean the hubs on non abrasive surfaces.
- Avoid to roll or slide the components during handling.
- Avoid to heat up the flange above 80 C.
- Avoid the direct contact between flames and coated
surfaces.
- Avoid banging or hitting the coated with any object.
- Loosen all the pillow block bolts to allow an easy
introduction of the blade shank
avoiding to scratch or damage the coated surfaces.
This procedure applies to the two adjacent pillow blocks
too.
- If re-pitching is required, loosen all the pillow block bolts
to allow an easy rotation of
the blade avoiding to scratch or damage the coated surfaces.
This procedure applies to the two adjacent pillow blocks
too.
- In case the coated surface gets damaged, apply the coating
repair procedure as soon as
possible.
-
Fan lifting procedure
IOPRO025
Rev. 00
10/07/2012 Pag. 1 of 1
Rif.: PGPRO001
Written: UT Approved: QA Date: 10/07/2012
Fan lifting procedure
The following rules must be observed during lifting:
- The handling of the unpacked material should be minimize to
avoid coating damages.
- The use of any metal tool, chain and hook, directly in contact
with any part of the fan
shall be avoided.
- The assembled fan shall be lifted up using at least three
lifting points equally spaced.
- The fan must not be lifted up using the blade FRP shafts as
lifting point.
- The lifting devices should be suitable for the fan
weight/dimensions in object.
- The general/local lifting rules shall always be respected.
- The blades have to be lifted up with the profile in vertical
position as per below sketch.
-
ITEM Q.TY DESCRIPTION MATERIAL PROTECTIVE TREAT.
3 2 HUB DISK STEEL S275 PAINT ISO 12944 C5-M
5
1 HUB BOSS STEEL C43/C45 PAINT ISO 12944 C5-M
6
7
10 HUB PILLOW BLOCK ALUMINUM NONE
8
9
10
11
12
13
14
15
HUB FIXING WASHER NOT SUPPLIED BY COFIMCO
16
17
20 5 BLADE ASSY GLASS-REINF. PLASTIC NONE + AISI L.E.P.
6 SCREW STAINL. STEEL AISI316 NONE
20 SCREW STAINL. STEEL AISI316 NONE
1
1
5 PIN STAINL. STEEL AISI316 NONE
20 NUT STAINL. STEEL AISI316
5 BLADE SHAFT STEEL 39NiCrMo3 PAINT ISO 12944 C5-M
20 SELF LOCKING WASHER STAINL. STEEL AISI316
6 NUT STAINL. STEEL AISI316
PLATE STAINL. STEEL AISI316 NONE
40 FLAT WASHER STAINL. STEEL AISI316 NONE
6 SELF LOCKING WASHER STAINL. STEEL AISI316 NONE
NONE
NONE
NONE
5 GAP RING REGULATOR AL ALLOY EN AW 6060 NONE
4
5x6029-07 rev.0
6096/05/33F/G1.5T
CUSTOMERORDER NO.PROJECT/ITEMFAN MODEL
ESINDUS S.A.DATE
12/06/13SCALE
- / -
DRAWING NO.
PL-36609-1-ENG
REV.
1
PART LIST
COFIMCO REF. 36609/553mm [X]inches []
THIS DRAWING IS PROPERTY OF COFIMCO SRL ANY RIGHT IS RESERVED
ACCORDING TO THE LAW.
AXIAL FANS FOR THE WORLD
PL-G-B45-1_SW_W.emf
COFIMCO SRL - VIA GRAMSCI, 62 28050 POMBIA (NO) ITALY - PH. +39
0321968311 - FAX +39 0321958992 - [email protected]
25 SCREW NOT SUPPLIED BY COFIMCO
3
5
6
7
8
9
10
11
12
13
14
15
16
17
20
1 4
25
3
6 10
4
26
26
26 4 PIN NONE
1
6
TBD SPACER RING
STAINL. STEEL AISI304
-
PRODUCTION SCHEDULE
Customer: ESINDUS,S.A. Cofimco Job: 36609/553 Issue: AP.O.:
5x6029-07 REV.0 Fan model: N. 2 fans 6096-5-33F/G1.5T Date:
12/06/2013Project: EFACEC CCRL ANGOLA Prepared: G. PlancaDelivery
date: WEEK 32/2013 DAP MADRID (E)
Week 2012/2013 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38
39ORDER PLACEMENTProduction drawingsOrders to suppliersSUPPLY Raw
materialsblade profilehub flangesblade shaftshub
diskesboltsMANUFACTUREhub flangespaintingshubs
assembling/balancingblades assembling/balancingINSPECTIONinternal
inspectionPACKINGSHIPPINGDOCUMENTATION
Notes: The a.m. scheduled manufacture activity progress, may be
changed through new updated document issue.
Notes
In stockIn stock
Kanban
June July August September
-
Note: this document is property of Cofimco S.r.l. and shall not
be reproduced, used or disclosed to third parties without owners
written permission.
Axial flow fans for the word
PRO_COAT_016 C5-M New System
PRO_COAT_016 Eng
Rev. 04 01/09/2011
Page 1 of 4
Rev. Dtd Description Modified paragraphs
04 01/09/2011 Full revision upon International Paint technical
support All
05 06/07/2012 Added alternative thinners, overcoating interval
2, 2.1
C5-M VERY HIGH CORROSIVITY ENVIRONMENT - HUB AND FLANGE PAINTING
PROCEDURE NEW SYSTEM
Painting procedure for steel parts designed for very high
corrosivity (Marine) environments classified by ISO12944-2 as
C5-M.
TYPE: New Construction
SUBSTRATE: Steel
ENVIRONMENT: C5-M Marine/Offshore (High Durability)
ISO12944-5
1 SURFACE PREPARATION
The performance of this product will depend upon the degree of
surface preparation. The surface to be coated should be clean,
dry
and free from contamination. Prior to paint application all
surfaces should be assessed and treated in accordance with ISO
8504:2000
(Preparation of steel substrates before application of paints
and related products. Surface preparation methods).
Sharp edges, fillets, corners and welds shall be assessed and
treated in accordance with ISO 8501-3:2006 (Preparation grades
of
welds, cut edges and other areas with surface
imperfections).
Any oil and grease contamination shall be removed prior to
blasting operations in accordance with SSPC-SP1 solvent
cleaning.
Sandblasting: Abrasive blast clean to Sa2.5 (ISO 8501-1:2007) or
SSPC-SP6. If oxidation has occurred between blasting and
application, the surface should be re-blasted to the specified
visual standard.
Surface defects revealed by the blast cleaning process, should
be ground, filled, or treated in the appropriate manner.
A sharp, angular surface profile of 50-75 microns (2-3 mils) is
recommended.
After the sandblasting treatment, the piece will be carefully
cleaned by air blowing, in order to remove all traces of abrasives
and
dust.
-
Note: this document is property of Cofimco S.r.l. and shall not
be reproduced, used or disclosed to third parties without owners
written permission.
Axial flow fans for the word
PRO_COAT_016 C5-M New System
PRO_COAT_016 Eng
Rev. 04 01/09/2011
Page 2 of 4
2 PAINT PREPARATION/APPLICATION
Application of the coat shall be carried out before any possible
surface damage and/or contamination.
The paint will be applied using airless spray air spray gun; dry
air is required for proper application.
Before and during painting
air temperature
steel temperature
relative humidity
dew-point within the painting area
shall be measured and under control. Records of measurements
shall be maintained.
The paint will be applied in accordance with the paint
manufacturers instructions (technical datasheet) and following
table and
instructions:
Vol.
Film thickness
micron Recoating intervals guiding data
Sp
r.
rate
Coat Product name % Dry film Wet 10C 15C 25C
40C Thinner/Cleaner
sol. Min Spec Max Spec Min Max Min Max Min Max Min Max m2/l.
GTA
1st Interzinc 52 59 50 70 140 120 6 h Ext 4 h Ext 3 h Ext 2 h
Ext 7,9 220 822
2nd Intercure 99 80 160 200 300 250 2,5h ext 2,5h ext 1,5h ext
1,5h ext 4 GTA 713
(GTA 056) (GTA 733)
GTA 713 (GTA 056) (GTA 733)
Total DFT microns 270
NOTES
Only mentioned thinners or cleaners can be used.
INTERCURE 99 - Drying times quoted relate to 50% RH,. Increased
humidity may result in faster drying time.
IT IS STRONGLY RECOMMENDED TO FOLLOW THE ISTRUCTIONS GIVEN ON
IC99 WORKING PROCEDURE.
-
Note: this document is property of Cofimco S.r.l. and shall not
be reproduced, used or disclosed to third parties without owners
written permission.
Axial flow fans for the word
PRO_COAT_016 C5-M New System
PRO_COAT_016 Eng
Rev. 04 01/09/2011
Page 3 of 4
2.1 APPLICATION DETAILS
Intercure 99 must NOT be applied directly over Interzinc 52 low
temperature grade cure (EPA 176)
The following MEK test MUST be carried out before the
application of Intercure 99 on Interzinc 52:
o Make 4 pass with a white cotton/rug wetted by MEK solvent on
Interzinc 52.
the result MUST be grade 5 or 4 as per ASTM D 4752
THINNER (Intercure 99): partial thinning with International
GTA713 (or GTA056 or GTA733) only, although this would not
normally
be required. The use of alternative thinners, particularly those
containing alcohols, can severely affect the curing mechanism
and/or
workable pot life of the coating.
2.2 MEASUREMENT OF DRY FILM THICKNESS
Individual dry film thicknesses of less than 80% of the nominal
dry film thickness are not acceptable.
Individual values between 80% and 100% of the nominal dry film
thickness are acceptable provided that the overall average
(mean)
is equal to or greater than the nominal dry film thickness.
Care shall be taken to achieve the nominal dry film thickness
and to avoid areas of excessive thickness.
It is recommended that the maximum dry film thickness is not
greater than 2 times the nominal film thickness.
3 CONTROL TESTING
3.1 SURFACE INSPECTION
After the coating process, the coating shall appear uniformly on
all coated parts, free of defects, drips, burns, inclusions and
porosities.
Test, inspection and final documentation shall be in compliance
with this procedure and/or customer requirements.
3.2 THICKNESS CHECK
See point 2.2: thickness shall be checked on all the pieces.
3.3 ADHESION CHECK
Adhesion check will be performed at least on 1 piece per
production batch or on a test panel prepared and coated at the same
time
for each batch, using both following test methods.
X cut: test according to ASTM D3359, A method. Minimum required
grade: 4A (ASTMD3359, 7.7) Pull off: test according to ISO4624.
Minimum required adhesion value: 5MPa.
-
Note: this document is property of Cofimco S.r.l. and shall not
be reproduced, used or disclosed to third parties without owners
written permission.
Axial flow fans for the word
PRO_COAT_016 C5-M New System
PRO_COAT_016 Eng
Rev. 04 01/09/2011
Page 4 of 4
4 PACKAGING - HANDLING
It is required an adequate and safe packaging of the painted
components in order to avoid any possible damage to the
surface.
Any defect on the painted surface is not admissible.
5 PAINTING REPAIR
It is admitted that some scratches on the surface can be
repaired by manual application of the paint where it has been
accidentally
removed. Repair shall be carried out according to
PRO_COAT_035.
-
COFIMCO S. r . l . Via Gramsci, 62 - 28050 POMBIA (NO) - ITALY
tel. +39-0321-968311 fax +39-0321-968399
Web site: http://www.cofimco.com E-mail: [email protected]
REPORT # PR BAL M10 01 01
TITLE:
PROCEDURE FOR THE DYNAMICAL BALANCING
OF THE SERIES G-GR HUBS
(TRANSLATION FROM ITALIAN FOR
INFORMATION ONLY)
DATE: 06/03/00
Copy #1
Revision 0 - Date: 18/01/2007
-
HUB DYNAMICAL BALANCING -
SERIES G-GR
1.0 PREPARATION OF THE BALANCING MACHINE 1.1 Use the dynamical
balancing machine ZD 1000 (S/N 3696 ) or equivalent. 1.2 Clean the
machine and the working area before to start to set the machine.
All the materials that could obstacle the operator work must be
removed from the working area. Check that the safety devices are
fully operative. 1.3 Install the shaft suitable for the hub bore
dimension. 1.4 Connect the transmission shaft. 1.5 Balance the
shaft. 1.6 Install the hub to be balanced (upper and lower disk,
pillow blocks and bolts duly assembled), lock it to the shaft. 1.7
Set the distance from the rotation axis where the balancing weight
will be applied.
2.0 HUB BALANCING 2.1 Be sure that the safety device are set and
that nobody is in the area near to the machine. 2.2 Start the
machine. 2.3 Increase the speed till the design one.
-
2.4 The machine display shows, using a 1 to 100 angular scale,
the point where the balancing weight has to be applied.
2.5 The machine display shows the value of the balancing weight
to be applied. The weight has to be applied only if its value is
higher that the maximum unbalance value. This is calculated using
the following formula:
RNW
G hub10
where: Whub - hub weight [g] G - balancing degree [mms-1] N -
design speed [rpm] R - distance of the unbalancing from the
rotation axis
[mm]
2.6 The balancing weight has to be applied only if the value
shown by the display is higher than the maximum unbalance value.
The weight is applied in the position shown by the display. 2.7
Repeat the points from 2.3 to 2.6 till the unbalancing value shown
by the display is lower than the maximum unbalance value
(calculated in accordance to the point 2.5)
-
AXIAL FANS FOR THE WORLDCOFIMCO S.r.l. a Socio Unico
28050 Pombia (NO) - Via Gramsci, 62 - Tel. +39 0321968311 - Fax
+39 0321958992
Recommended spare part list
Fan model 6096-5-33F/G1.5T
Fans quantity 2
Cofimco ref 36609/553
PO n 5x6029-07 REV.0
Recommended spare part list - Start up
description Ref. to PL-36609-
1-ENG
q.ty notes
pilow block bolt 9,10,11,12 4 4 bolts for each blade ,
reccomended
q.ty enough for one blade
Recommended spare part list - 2 years of operation
description Ref. to PL-36609-
1-ENG
q.ty notes
pilow block bolt 9,10,11,12 20 4 bolts for each blade ,
reccomended
q.ty enough for one complete fan
hub boss bolt 5,6,7,8 6 reccomended q.ty enough for one
complete fan
Prepared by Date
A. Crespi 12/06/2013
G-GR_EN_Manual.pdfTable of ContentsList of FiguresList of
TablesWarrantyGeneral InformationsInstallationRequired tools for
assemblyFan rotation and flow directionInclination of blade
axisInstallation procedure for Cofimco fans with G-Series
hubStandard hub placement to driving shaftHub with coupling flange
placement to driving shaftDisk installation to the coupling
flange
Blades installation and pitch angle setting
Operating InstructionsPrior to start-up operationsPost start-up
operations
Preventive Measures for MaintenanceMaintenance and
operationsTemperature rangePossible causes of vibration
Hub RemovalStandard HubHub with coupling flange
Trouble ShootingsPart ListStandard hubHub with coupling
flange
Contacts
GA-36609-1.pdfdeclaration CE ESINDUS 36609.pdfIOPRO002 rev.0
Controlli di Bilanciatura Statica - GB.pdfIOPRO019 ENG - Storage
procedure - Rev.00.pdfIOPRO022 ENG - Handling procedure for painted
parts - Rev 00.pdfIOPRO025 ENG - Fan lifting procedure -
Rev.pdfPL-36609-1.pdfPlaneamento_prod_ventilador_36609.pdfPRO_COAT_016
Eng - C5M New System Rev. 05.pdfPROCEDURA BILANCIATURA DINAMICA
MOZZI G - ENG.pdfrecommended spare parts 36609.pdf