SPX Cooling Technologies Fan HP700 User Manual

Marley HP7000 Fan  
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User Manual 97-1342B  
 
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 utilizing a bolted fan hub retention plate or a straight fan shaft  
using a split taper bushing. Installation on other gear reduction  
units may be different. Contact your Marley sales representative  
for supplemental instructions if required.  
If the fan installation is for a Marley 36, 38, 3600, or 4000 model  
Geareducer, or uses a U1 split taper bushing on a straight (out-  
put) shaft, refer to the applicable instructions below.  
Note  
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 7(180mm) of the fan shaft.  
2–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  
certain 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–Install the retention plate and hardware. Torque bolts to 70 ft·lbƒ  
(95 N·m).  
36 and 38 Series Geareducers use a tapered fan shaft key.  
Correct key installation is imperative for proper and safe op-  
eration. The following instructions detail installation for these  
applications.  
36 and 38 Geareducer  
1–Remove the retention plate and hardware from the top of the  
Geareducer. Thoroughly clean the fan shaft, fan shaft key, and the  
hub center bore to remove any debris and/or protective coatings.  
After cleaning, apply a coat of anti-seize compound to the top 7″  
(180mm) of the fan shaft.  
2–Install the 36 and 38 Series Geareducer fan shaft key in the fan  
shaft keyway as shown in Figure 2. The key is a tight fit across the  
width and must never be altered.  
3
 
Fan Hub Installation  
1
/
2
"
1
1
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2
"
1
GEAREDUCER  
FAN SHAFT  
5
/
8
"
MIN  
3
/
8
"
1
TAPERED SIDE  
OF KEY  
Figure 2  
36 and 38 Geareducer  
3–Raisethehubassemblyabovethefanshaftforinstallation. Slowly  
lower the assembly onto the shaft with the keyways aligned. Make  
certain the key does not slide down during installation. Stake the  
key in the keyway with a center punch if necessary.  
After the hub assembly is installed the bottom end of the key must  
extend through the bottom of the center hub, and the top end of  
the key must extend 5/8(16mm) minimum above the top of the fan  
shaft. Do not force the key down once these criteria are met.  
4–Figure 3 illustrates proper retention plate and hardware installa-  
tion. The retention plate is designed to allow clearance for the fan  
shaft key, and when properly installed will not extend over or inter-  
fere with the key in any way. Torque the retention bolts to 70 ft·lbƒ  
(95 N·m) then turn up the locking strap corners to prevent the bolts  
from loosening.  
RETENTION  
PLATE  
FAN HUB  
RETENTION  
BOLTS  
KEY  
Figure 3  
36 and 38 Geareducer  
LOCKING  
STRAPS  
4
 
Fan Hub Installation  
The U1 split taper bushing provided with the fan installation kit  
will be either a Type 1 or a Type 2 bushing. A Type 1 bushing will  
use the fan shaft key provided with the Geareducer. A Type 2  
bushing uses an integral key that is shared by the output shaft  
and the fan hub keyways. To distinguish which type of bushing  
is provided, refer to Figure 4.  
U1 Split Taper Bushing  
1–Remove the fan shaft key from the top of the Geareducer shaft  
and discard if a Type 2 split taper bushing is being used. Thoroughly  
clean the fan shaft and fan hub center bore to remove any debris  
and/or protective coatings. After cleaning, apply a coat of anti-seize  
compound from the end of the fan shaft down to the length of the  
shaft keyway.  
2–Remove the U1 split taper bushing from its packaging. Discard  
and replace the 5/8-11NC black steel cap screws provided within  
thebushingpackagingwiththe5/8-11NCstainlesssteelcapscrews  
provided with the fan installation kit. Thoroughly clean the bushing  
center bore and outside taper (barrel) surface to remove any protec-  
tivecoating. Aftercleaning, applyathincoatofanti-seizecompound  
to the outer taper surface of the bushing.  
3–Aligning the outside taper (barrel) bushing key with the keyway  
of the hub bore, loosely start the Type 1 or Type 2 bushing into the  
bore of the hub. The three (3) threaded holes in the hub must be  
aligned with the non-threaded holes in the bushing flange—Note,  
the two (2) threaded holes in the bushing flange are used only  
for disassembly. Apply anti-seize compound to the threads of the  
5/8-11NC stainless steel cap screws. Insert the cap screws through  
the non-threaded holes in the bushing flange and thread them by  
hand into the hub two or three turns only.  
4–If a Type 1 split taper bushing is being used, prior to installing the  
bushing-hub assembly onto the fan shaft, fully seat the key in the  
fan shaft keyway. The key is a tight fit across the width and must  
never be altered.  
5
 
Fan Hub Installation  
5–Position the bushing-hub assembly over the Geareducer fan  
shaft. Carefully align the bushing bore keyway with the previously  
installed shaft key—or if using a Type 2 split taper bushing, align  
the shared hub/bushing key with the fan shaft keyway. Lower the  
assembly onto the shaft. The assembly must slide onto the output  
shaft enough to ensure the shaft key runs the entire length of the  
bushing bore. It may be necessary to slightly wedge open the split  
taper bushing for easier engagement of the fan shaft into the bush-  
ing bore. This can be accomplished by driving a wedge into the  
bushing flange split.  
6–Using a torque wrench, tighten the stainless steel cap screws  
sequentially until each is tightened to 140 ft·lbƒ (190 N·m). When  
the cap screw torque is at or near 140 ft·lbƒ (190 N·m), make at  
least two more sequential rounds to assure all cap screws are to  
the required torque value.  
Type 1 U1 Split Taper Bushing  
Type 2 U1 Split Taper Bushing  
Figure 4  
6
 
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  
1–Lubricate the 3/4bolt and 3/4hex-nut threads with thread lu-  
bricant. Set the hardware aside.  
2–Remove one set of blade clamps from the hub assembly. Blade  
clampsareinstalledonthehubassemblyatthefactorywithspacers  
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 4. 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 the  
concave blade side (TOP) on the discharge side between the hub  
assembly plates as shown in Figure 5 and Figure 6. Vertically align  
the four bolt holes in the clamps and plates. Install four lubricated  
3/4bolts, eight 3/4flat washers, (four 3/4lock washers if hard-  
ware material is monel), and four 3/4hex 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.  
LOCKING HEX NUT OR  
HEX NUT AND LOCK WASHER  
BLADE CLAMP  
FLAT WASHER  
HUB PLATE  
HUB PLATE  
FLAT WASHER  
Figure 5  
MACHINE BOLT  
FAN BLADE  
7
 
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 (see page 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 2(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.  
2–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 3/4hex nuts to  
120 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 3/4hex nuts at 120 ft·lbƒ (163 N·m)  
torque.  
3–Repeat step 2 for all blades.  
4–Check the vertical blade-tip track variation. The allowable verti-  
cal variation from a reference plane is 1(25mm). If a blade’s tip  
track is out of tolerance, loosen the 3/4hardware and change the  
blade tip support location higher or lower as required to adjust the  
tip track. Recheck blade pitch angle.  
BLADE  
TIP  
STRAIGHT  
EDGE  
BEVEL  
PROTRACTOR  
PITCH ANGLE  
Figure 6  
2"  
8
 
Hub Cover Installation  
Install the hub cover as shown in Figure 1 and Figure 7. Tighten all  
hex nuts to 15 ft·lbƒ (20 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 contin-  
ued 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.  
9
 
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 8) is required to identify blades for replacement. The  
fan hub assembly identification number (see Figure 1) is required to  
identify a replacement hub assembly or repair components. Please  
providetheMarleysalesofficeorsalesrepresentativethenecessary  
information when ordering replacement fans or components.  
Blades can be replaced without rebalancing the entire fan.  
If rebalancing is desired, contact the Marley sales office or repre-  
sentative in your area.  
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 8–Blade Nameplate  
10  
 
Motor Load  
The corrected horsepower should be close to but not exceed the  
contract horsepower specified by Marley. Determine corrected  
horsepower using the following equation.  
VOLTSA × AMPSA × DENSITYD  
× HPN  
HPC  
=
VOLTSN × AMPSN × DENSITYA  
HPC  
=
=
=
=
Corrected Horsepower VOLTSN  
=
=
=
=
Nameplate Volts  
VOLTSA  
AMPSA  
DENSITYA  
Actual Volts  
AMPSN  
HPN  
Nameplate Amperage  
Nameplate Horsepower  
Design Air Density  
Actual Amperage  
Actual Air Density  
DENSITYD  
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  
measuringtheapproximatedsinewave.Instrumentscapableof  
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.  
11  
 
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7401 WEST 129 STREET OVERLAND PARK, KANSAS 66213 UNITED STATES 913 664 7400 [email protected] spxcooling.com  
In the interest of technological progress, all products are subject to design and/or material change without notice.  
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©2008 SPX Cooling Technologies, Inc. Printed in USA  
Manual 97-1342B  
 

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