Marley HP7000 Fan Clamped Blade Shank – 192" thru 240"
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User Manual 01-1139A
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Fan Hub Installation
The following instructions detail the process for installing a Marley
HP7000 Fan on a Marley Geareducer® with a tapered fan (output)
shaft and bolted fan hub retention. Installation on other gear reduc-
tion units may be different. Contact your Marley sales representative
for supplemental instructions if required.
1–Remove the retention plate and hardware from the top of the
Geareducer shaft. Thoroughly clean the fan shaft, fan shaft key,
and the fan hub center bore to remove any debris and/or protective
coatings. After cleaning, apply a coat of anti-seize compound to the
top 5″ (130mm) of the fan shaft.
ꢀ–Prior to hub installation, fully seat the key in the fan shaft keyway.
The key is a tight fit across the width and must never be altered.
3–Raise the fan hub above the fan shaft for installation. Slowly lower
the hub onto the shaft with the keyways properly aligned. Make cer-
tain the key does not slide down during installation. Stake the key
in the keyway with a center punch if necessary.
The fan shaft key should be approximately centered in the engaged
portion of the hub when engaged on the shaft. Verify the center hub
is fully seated by visual inspection.
4–The hub retention plate will sit on top of the spool. Discard the
retention bolts that come with the Geareducer. New retention bolts
are provided with the hub cover hardware kit.Torque bolts to 50 ft·lbƒ
(68 N·m).
Figure 2
3
Fan Blade Installation
MarleyHP7000fanbladesaremanufacturedtoequalmomentweight
and blade clamps to equal static weight. The blades and clamps can
be installed in any position without affecting fan balance.
At the end of the blade shank on a nameplate is inscribed a let-
ter code (i.e. “A” or “B” etc.). When installing or replacing blades
use only blades with the same letter code.
Note
HP7000 Fan
BLADE SIZE
MOMENT WEIGHT CLASS
SERIAL NUMBER
For Additional Information Refer to HP7000 Manual
SPX Cooling Technologies
Overland Park, KS USA
913 664 7400
Figure 3–Blade Nameplate
1–Lubricate theC\v″ boltandC\v″ hex-nutthreadswiththreadlubricant.
Set the hardware aside.
Figure 4
4
ꢀ–Remove one set of blade clamps from the hub assembly. Blade
clamps are installed on the hub assembly at the factory with spacers
for shipping purposes. Remove and discard the spacers. Position
the blade clamps around the shank of a blade with the machined-
face end of the blade clamp against the blade safety shoulder. See
Figure 5. Large nylon cable ties can be used to hold blade clamps
on the blade during installation providing easier assembly.
3–Insert the blade with blade clamps around the shank and with
LOCKING HEX NUT OR
HEX NUT AND LOCK WASHER
FLAT WASHER
BLADE CLAMP
HUB PLATE
HUB PLATE
FLAT WASHER
MACHINE BOLT
FAN BLADE
Figure 5
the concave blade side (TOP) on the discharge side between
the hub assembly plates as shown in Figure 4. Vertically align
the two bolt holes in the clamps and plates. Install two lubricated
C\v″ bolts, four C\v″ flat washers, (two C\v″ lock washers if hardware ma-
terial is monel), and two C\v″ hex nuts, engaging the nuts only three
to four threads as shown in Figure 5. Do not tighten the hardware
until all the blades have been installed. The blade must be free to
rotate in the clamp for pitch adjustment.
4–Repeat until all blades, clamps, and hardware have been installed
in the hub assembly.
5
Adjusting Fan Blade Pitch
The trial pitch is the calculated setting for design conditions
(water rate , heat load, air density, and brake horsepower). The trial
pitch is provided by SPX Cooling Technologies (see page 2).
Note
BLADE
TIP
STRAIGHT
EDGE
BEVEL
PROTRACTOR
PITCH ANGLE
Section
Figure 6
2"
1–Select a position on the fan circumference and rotate each blade
to this common location when setting or checking blade pitch. Sup-
port the blade tip to maintain a common rotation plane while setting
the fan pitch. The pitch is set within ꢀ″ (51mm) of the blade tip by
placing a bevel protractor on top of a parallel sided straight edge
that extends across blade width as shown in Figure 6.
ꢀ–Pull the blade outward so the safety shoulder is in contact
with the blade clamp, then set the pitch. See Figure 5. Blades
should be within ± 1/4° of the desired pitch angle. After the de-
sired setting is obtained, progressively tighten the C\v″ hex nuts to
1ꢀ0 ft·lbƒ (163 N·m) torque. Recheck the pitch angle. If required,
loosen the hex nuts and reset the pitch as necessary until the proper
pitch angle is obtained with the C\v″ hex nuts at 1ꢀ0 ft·lbƒ (163 N·m)
torque.
3–Repeat step ꢀ for all blades.
4–Check the vertical blade-tip track variation. The allowable vertical
variation from a reference plane is ±1″ (25mm). If a blade’s tip track
is out of tolerance, loosen the C\v″ hardware and change the blade
tip support location higher or lower as required to adjust the tip track.
Recheck blade pitch angle.
6
Hub Cover Installation
Install the hub cover as shown in Figure 1 and Figure 7. Tighten all
hex nuts to 15 ft·lbƒ (ꢀ0 N·m) torque.
145
300
142
144
146
142
143
102
142
141
Figure 7
Fan Maintenance
Preventative maintenance will prolong useful life and assure con-
tinued trouble-free operation. After the first week and subsequently
at six month intervals:
• Torque all hardware to specifications referenced in this manual.
• Visually inspect the fan for airborne debris damage, contact with
fan cylinder segments, and corrosive attack. Correct any situations
determined detrimental to fan operation.
• Remove any accumulated scale or dirt.
• Clear blade drain holes.
Service
Proper identification of your fan is necessary to insure you receive
correct replacement parts. The Marley cooling tower serial number
can be used to determine the fan and any components installed and
maintained as original equipment on a Marley cooling tower. The fan
diameter and moment weight class from the blade nameplate (see
Figure 3) is required to identify blades for replacement. The fan hub
➠
7
assembly identification number (see Figure 1) is required to identify
a replacement hub assembly or repair components. Please provide
the Marley sales representative the necessary information when
ordering replacement fans or components.
Blades can be replaced without rebalancing the entire fan.
If rebalancing is desired, contact the Marley sales representative in
your area.
Motor Load
The corrected horsepower should be close to but not exceed the
contract horsepower specified. Determine corrected horsepower
using the following equation.
VOLTSA × AMPSA × DENSI-
TYD
HPC
=
× HPN
HPC
power
=
Corrected Horse-
DENSITYA
VOLTSN
AMPSN
HPN
=
Actual Air Density
=
=
=
Nameplate Volts
VOLTSA
AMPSA
=
=
Actual Volts
Nameplate Amperage
Nameplate Horsepower
Actual Amperage
Actual volts and amperage must be obtained with the fan running
and the specified rate of water flowing over the tower after the motor
andGeareducerhavereachedoperatingtemperature(approximately
30 minutes of operation).
Measurements taken on motors operating with Variable Fre-
quency Drive controls may read up to 15% high from errors in
measuring the approximated sine wave. Instruments capable
of measuring a squared off wave form accurately should be
used for measuring power in this situation.
Note
Do not exceed 30 sec/hour total motor starting time as motor
may overheat.
Cooling Technologies
Balcke Hamon Dry Cooling Marley
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7401 W 129 Street // Overland Park, KS USA 66213 // +1 913 664 7400 // [email protected] // www.spxcooling.com
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In the interest of technological progress, all products are subject to design and/or material change without notice
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©2005 SPX Cooling Technologies, Inc. Printed in USA
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