SPX Marley NC Series Installation Operation & Maintenance Download Page 5

5

Tower Shipment

Unless otherwise specified, NC towers ship by truck (on flat bed trailers), 
which lets you receive, hoist, and install the tower in one continuous operation. 
Single-cell towers ship on one truck. Multicell towers, depending on their size, 
may require more than one truck. 

Responsibility for the condition of the tower upon its arrival belongs to the 
trucker—as does the coordination of multiple shipments, if required.

Receiving Tower

Prior to unloading the tower from the delivering carrier, inspect the shipment 
for evidence of damage in transit. If damage is apparent, note the freight bill 
accordingly. This will support your future recovery claim.

Find and remove the installation instruction drawings and bills of material 
located in a plastic tote in the cold water basin. This information should be 
kept for future reference and maintenance purposes.

Hoisting Tower

NC8411 through NC8414 models consist of two modules per cell. The upper 
module includes hoisting clips at the top of the module. The hoisting clips on 
the lower module are located near the bottom on the sides of the cold water 
basin. All other models ship in a single module.

NC upper and lower modules must be hoisted and set separately. 
Do not preassemble modules prior to hoisting.

The hoisting clips for NC8409 are located near the bottom of the tower on 
the cold water basin sides. The hoisting clips for all other models are located 
at the top of the tower. A Hoisting-Installation label which has hoisting 
dimensional information is located on the side casing near the tower cen-
terline. Remove tower from the carrier and hoist into place according to the 
instructions on the label.

Hoisting clips are provided for ease of unloading and positioning 
tower.  For  overhead  lifts  or  where  additional  safety  is  required, 
safety slings should also be placed under the tower. Under no 
circumstances should you combine the top and bottom modules 
of modular models and attempt to hoist them at the same time by 
utilizing the hoisting clips alone!

 

Warning

receiving and hoisting

 

Caution

Summary of Contents for Marley NC Series

Page 1: ...NC steel cooling tower I N STALLATION OPE RATION MAI NTE NANCE Z0628276 rev A I SSU E D 05 2015 READ AND UNDERSTAND THIS MANUAL PRIOR TO OPERATING OR SERVICING THIS PRODUCT US E R MAN UAL...

Page 2: ...ng tower Carefully read the manual before installation or operation of the tower and follow all instructions Save this manual for future reference Indicates presence of a hazard which can cause severe...

Page 3: ...ranty If you have questions about the operation and or maintenance of this cooling tower and you don t find the answers in this manual please contact your Marley sales representative When writing for...

Page 4: ...ccess platform Tower Location Space available around the tower should be as generous as possible to pro mote ease of maintenance and to permit freedom of airflow into and through the tower If you have...

Page 5: ...es per cell The upper module includes hoisting clips at the top of the module The hoisting clips on the lower module are located near the bottom on the sides of the cold water basin All other models s...

Page 6: ...amsandfromthetopofthebottommoduleandremoveshipping cover from bottom of top module replace fasteners at side of module to preventleaks Placetopmoduleonthetopperipheralbearingsurface factory installedg...

Page 7: ...ropriately sized circular opening has been provided to accept a 125 ANSI B16 1 flat face flange connection Side outlet sump connection Unless otherwise specified sumps are manufactured of heavy duty F...

Page 8: ...place of the standard elbows normally required for inlet connection and 2 provide means of regulating flow to both sides of the tower Remove the center inlet flume assembly to gain access for attachm...

Page 9: ...t cycling the tower will cause fuses breakers or O L s to operate and will decrease motor life When using a two speed starter Motor rotation must be the same at slow speed and high speed Single windin...

Page 10: ...ied at reduced speeds To benefit from these advantages it is important that the drive be installed correctly Marley supplies VFD and VFD controls specifically designed for our cool ing products If you...

Page 11: ...models include a single piece fan guard NC8405 through NC8414 models include a two piece fan guard Models with extended velocity recovery cylinders do not have fan guards Improper installation of the...

Page 12: ...s will prevent abnormal stress from being applied to the mechanical equipment and the electrical circuit components 5 Run the motor and observe the operation of the mechanical equipment Opera tion sho...

Page 13: ...that it is 75 open at that level Continue filling the system until the water reaches a level approximately 1 8 below the lip of the overflow If tower is equipped with a standard case face outlet conn...

Page 14: ...entoperation within these limits 6 Continue pump operation for about 15 minutes after which it is recom mended that the water system be drained flushed and refilled 7 While operating the condensing wa...

Page 15: ...cooling tower establishes only the cold water temperature attainable under any operating circumstance 2 Air wet bulb temperature Cold water temperature will also vary with the wet bulb temperature of...

Page 16: ...eraturebecomestoo cold switching the fan to half speed will cause the cold water temperature to rise stabilizing at a temperature a few degrees higher than before With a further reduction in water tem...

Page 17: ...below a mini mum allowable level say 36 F to 40 F If such low temperature operation is necessary or beneficial to your process establish the minimum allowable level as follows During the coldest days...

Page 18: ...on should not need to exceed 1 or 2 minutes Monitoring is required to determine the time required to melt accumulated ice Operating the fan in reverse at half speed for prolonged periods during subfre...

Page 19: ...ange of the internal riser and tap for a 20 bolt with sealing washer that will be used as a plug See figures below for drilling details Normally weep holes are plugged during tower operation and plugs...

Page 20: ...least the first eight weeks of operation pH should be controlled between 6 5 and 8 0 with hardness and alkalinity levels between 100 and 300 ppm expressed as CaCO3 Chlorine if used shall be added inte...

Page 21: ...surfaces should be flushed by use of a moderate pressure water nozzle being careful not to cause physical damage A reliable water treatment program should be installed and maintained Filtra tion devic...

Page 22: ...that secure the motor mount frame to the belt drive frame then loosen the retaining nuts on the two threaded rods and turn the threaded rods to apply proper tension Apply the same quantity of turns to...

Page 23: ...f each other and level within 1 2 1 8 in 12 in order to not adversely affect belt and sheave life Alignment can be achieved by placing a straight edge across the sheaves making sure that it is level a...

Page 24: ...s recommended that you read them thoroughly Where discrepancies may exist the separate Service Manuals will take precedence The following is recommended as a minimum routine of scheduled mainte nance...

Page 25: ...pment by hand grease the bearings until a bead forms around the seals Mobil SHC 460 grease is recommended Semi Annually If equipped check the belt tension and condition If equipped check Geareducer oi...

Page 26: ...ctions Motor located outside plenum option Open and lock out disconnect switch to make certain motor cannot be started 1 Remove guard as shown Opposite end motor bearing is accessible from outside the...

Page 27: ...s a need to have the tower painted If relatively bright metal can be exposed by cleaning consider that the galvanizing has remained effective Unless there is evidence of a generalized failure of the g...

Page 28: ...eds and maintain consistently optimum thermal performance capability They are available by contacting your Marley sales representative Replacementparts Acompletestockofpartsandcomponentsismaintained a...

Page 29: ...es if equipped Check for oil leaks in hoses or fittings x R x Belt drive if equipped Fan shaft bearing lubrication every 3 mo every 3 months every 3 months Check and tighten support fasteners x Check...

Page 30: ...anced voltage Check voltage and current of all three lines against nameplate values Overload Check fan blade pitch See Fan User Manual Check for drag in fan drivetrain as from damaged bearings Wrong m...

Page 31: ...foreign substance in circulating water system Insufficient blowown See Water Treatment section of this manual Water treatment deficiency Consult compentent water treating specialist See Water Treatmen...

Page 32: ...safety cages may also require field installation If installation details are not covered in the NC Field Installation Manual a separate installation drawing or manual for each purchased option is inc...

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