SPX Marley MH Marley MH Fluid Cooler Скачать руководство пользователя страница 18 | Manualshive

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Reversal may be at either full or half speed; however, reversal at half
speed is recommended. Reverse operation of the fan should be used
sparingly and should only be used to control ice,

not

to prevent it.

Reverse fan operation should not need to exceed 1 or 2 minutes. Monitor-
ing is required to determine the time required to melt accumulated ice.

Reverse operation of fans for prolonged periods during subfreezing
weather can cause severe damage to fans and fan cylinders. Ice can
accumulate inside fan cylinders at fan blade plane of rotation and
fan blade tips will eventually strike this ring of ice, damaging the fan
blades or cylinder. Ice can also accumulate on fan blades and be
thrown off, damaging fan cylinder or blades. Allow a minimum of 10
minute delay between reverse operation and forward operation during
subfreezing weather to permit ice to dissipate from fan blades and
fan cylinders. See Fan Drive Caution note on page 12 for fan speed
change and reversing precautions.

intermittent Wintertime Operation:

If periods of shutdown (nights, weekends, etc.) occur during freezing
weather, measures must be taken to prevent the water in the cold water
basin—and all exposed pipework—from freezing. Several methods are
used to combat this, including automatic basin heater systems and pump
freeze protection systems available from Marley.

Basin heaters systems will not prevent the coil from freezing.

Unless some means of freeze prevention is incorporated into your
system, the tower basin and exposed pipework should be drained at
the beginning of each wintertime shutdown period.

If tower basin is drained, verify that all basin heaters have been shut
off either by automatic cutoff or disconnect switch.

Protection against Coil Freezing:

Ethylene and propylene glycol solutions are the best means to protect the
coil from freezing. The following table provides the coil volume for each
MH Fluid Cooler model. MHF706 and MHF707 coil volumes are for both
coils added together.

Operation

Warning

Warning

Warning

Caution

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Содержание Marley MH Marley MH Fluid Cooler

Страница 1: ... V iÊNÊ Ê ÀÞÊ ÊNÊ À iÞ Ê iV iÃ Marley MH Fluid Cooler User Manual 05 116D ...

Страница 2: ......

Страница 3: ...on and operation of your fluid cooler Carefully read the manual before installation or operation of the fluid cooler and follow all instructions Save this manual for future reference Indicates presence of a hazard which can cause severe personal injury death or substantial property damage if ignored Indicates presence of a hazard which will or can cause personal injury or property damage if ignore...

Страница 4: ...ate located on the access door Safety First The location and orientation of the fluid cooler can affect the safety of those responsible for installing operating or maintaining the fluid cooler However since SPX Cooling Technologies does not determine the location or orienta tion of the fluid cooler we cannot be responsible for addressing those safety issues that are affected by the fluid cooler s ...

Страница 5: ...HF706 and MHF707 only Ladder extensions used where the base of the tower is elevated Safety cages for ladders External lube lines Access door platform Motor located outside the tower Double flow models MHF706 and MHF707 with Geareducer drive only External motor access platform Double flow models MHF706 and MHF707 with Geareducer drive only Plenum walkway Double flow models MHF706 and MHF707 only S...

Страница 6: ...pments if required Receiving Fluid Cooler Prior to unloading the fluid cooler 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 mate rial located in a plastic bag in the water collection basin This i...

Страница 7: ...cooler to supporting steel with 3 4 diameter bolts and flat washers by others See support drawing for location and quantity Position flat washers between the bolt head and the fluid cooler basin flange 3 Before setting top module in place on bottom module clean any debris from the underside of the top module fill skid and beams and from the top of the bottom module and remove shipping cover from b...

Страница 8: ... disconnect switch the motor should be wired to main power supply through short circuit protection and a magnetic starter with overload protection Motor Wiring Wire motor leads as shown on the motor nameplate matching the supply voltage Do not deviate from the motor nameplate wiring Either of following symbols may be shown on the motor nameplate Δ Δ Δ Y or YY These symbols represent how the motor ...

Страница 9: ... limit amp draw to nameplate amps during cold weather operation If furnished with a mechanical O L set this at 110 over motor nameplate amps Motor rotation must be the same in both VFD mode and By pass mode If cable distance between the VFD and motor is greater than 100 feet a DV DT output filter is recommended to avoid damage to the motor 100 feet distance is based on our field experience the VFD...

Страница 10: ...nual Improper use of a VFD may cause damage to equipment or personal injury Failure to correctly install the VFD drive will automatically void all warranties associated with the motor and any equipment that is either electrically or mechanically directly attached to the VFD drive system The length of this warranty avoidance will be contingent on properly installing the VFD system and repairing any...

Страница 11: ...reducer to the proper level with approved lubricant See Geareducer User Manual Check oil level at the Geareducer or dipstick standpipe located on fan deck if so equipped to confirm that the proper level is indicated 2 On double flow models MHF706 and MHF707 install fan cylinder and two piece fan guard according to the installation drawing shipped with the fluid cooler Improper installation of the ...

Страница 12: ...ith a 2 minute time delay between changes of direction These delays 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 equip ment Operation should be stable and if equipped there should be no evidence of oil leakage from the Geareducer 6 Ifequippedwithbeltdrivecheckthetorqueon...

Страница 13: ...inue filling the system until the water reaches a level approximately 1 8 3 mm below the lip of the overflow 4 Start your pump s and check for proper rotation as indicated by the arrow on the pump cover observe system operation A certain amount of pump down of the basin water level will occur before water completes the circuit and begins to fall from the fill in the up per module The amount of ini...

Страница 14: ... 7 0 to 7 6 The chlorine re sidual must be held at 4 to 5 mg L ppm for six hours measurable with standard commercial water test kits If the fluid cooler has been in operation and then shut down for a duration of time and not drained perform one of the two previous biocidal treatment programs directly to the fluid cooler storage vessel collection basin drain down tank etc without circulating stagna...

Страница 15: ...he fluid cooler Reduced wet bulb temperatures will result in colder process fluid temperatures However the cold process fluid temperature will not vary to the same extent as the wet bulb For example a 20 F reduction in wet bulb may result in only a 15 F reduction in cold process fluid temperature 3 Fluid flow rate Increasing the process fluid flow rate GPM will cause a slight elevation in cold pro...

Страница 16: ...pped with a two speed motor s you will enjoy greater opportunity for process temperature control When the process fluid temperature becomes too cold switching the fan to half speed will cause the cold process fluid temperature to rise stabiliz ing at a temperature a few degrees higher than before With a further reduction in fluid temperature the fan may be cycled alternately from half speed to off...

Страница 17: ...the minimum allowable cold process fluid temperature is estab lished at or near minimum heat load it should be safe for all operat ing conditions Having established the minimum allowable cold water temperature maintaining that temperature can be accomplished by fan manipulation as outlined in Item 4 under Fluid Cooler Operation 2 As cold air enters the louvers it causes the water flowing over the ...

Страница 18: ...rive Caution note on page 12 for fan speed change and reversing precautions Intermittent Wintertime Operation If periods of shutdown nights weekends etc occur during freezing weather measures must be taken to prevent the water in the cold water basin and all exposed pipework from freezing Several methods are used to combat this including automatic basin heater systems and pump freeze protection sy...

Страница 19: ...ur local Marley sales representative Operation Model Coil Volume US Gallons Model Coil Volume US Gallons MHF702__061 65 MHF705__061 235 MHF702__081 85 MHF705__081 315 MHF702__101 105 MHF705__101 390 MHF702__121 125 MHF705__121 465 MHF702__062 75 MHF705__062 285 MHF702__082 100 MHF705__082 380 MHF702__102 120 MHF705__102 470 MHF702__122 150 MHF705__122 565 MHF703__061 85 MHF706__061 390 MHF703__081...

Страница 20: ...lled 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 intermittently with a free residual not to exceed 1 ppm maintained for short periods Excessive chlorine levels may deteriorate sealants and other materials of construction An atmosphere surrounding the tower no worse than moderate indus trial where rainfall and fo...

Страница 21: ...e fill surfaces and the coil 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 Filtration devices may be employed to reduce the suspended solids concentrations thus increasing the ef fectiveness of the water treatment program See Fluid Cooler Startup instructions on page 13 B...

Страница 22: ...redistribution basin above the coil Belt Tensioning See Figure 1 and Figure 2 for MH Fluid Cooler models MHF702 thru MHF705 Loosen specified hardware located at the top and bottom of the motor support assembly before adjusting the jacking screws Do not remove the hardware it is required to support the motor Tighten the hardware after adjustment Ideal tension is the lowest tension at which the belt...

Страница 23: ... nuts at the end of the rod next to the casing Turn the nut closest to the end of the rod to tighten the belt Turn the other nut to loosen the belt After achieving proper tension tighten the double nuts located on the fan side of the motor support against the motor support to maintain belt tension then retighten the motor support nuts Ideal ten Figure 1 3 2 7 2 4 2 3 2 73 SINGLE MOTOR TWO FANS 4 2...

Страница 24: ...lier Sheave Alignment The motor sheave is to be positioned as close as possible to the motor in order to minimize stress on the motor bushings The motor and fan sheaves may have grooves that are not used The bottom surface of the motor and fan sheaves must be aligned within 1 8 of each other and level within 1 2 1 8 in 12 in order to not adversely affect belt and sheave life Alignment can be achie...

Страница 25: ...result in a fall Included with this instruction packet are separate User Manuals on each major operating component of the tower and it is recommended that you read them thoroughly Where discrepancies may exist the separate User Manuals will take precedence The following is recommended as a minimum routine of scheduled main tenance Always shut off electrical power to the tower fan motor prior to pe...

Страница 26: ...igh pressure water may damage the eliminator and louver material Observe operation of the float valve Depress the operating lever to make sure that the valve is operating freely Inspect the suction screen for plug ging Remove any debris that may have accumulated Check for any buildup of silt on the floor of the collection basin Mentally make note of the amount if any so future inspections will ena...

Страница 27: ...r and fan guard Refer to Component User Manuals for torque values Inspect the fluid cooler thoroughly making maximum use of instructions given in the separate user manuals Check structural bolted connections and tighten as required Make preventive maintenance repairs as neces sary Check to see that all bolts are tight in the fan and mechanical equipment region including the fan cylinder and fan gu...

Страница 28: ...d draining promotes corro sion inside the coil tubes See protecting coil in Freezing weather on page 18 During shutdown clean the fluid cooler see Warning page 21 and make any necessary repairs Eliminators and louvers are easily removed to gain access to the coil Pay particular attention to mechanical equipment sup ports and sheaves or coupling or drive shafts Following each year s shutdown and cl...

Страница 29: ... Clean and lubricate motor at close of each operating season refer to motor manufacturer s recommendations Check motor anchor bolts and tighten as required See Page 28 for fluid coolers with motor located outside the plenum option Do not start motor before determining that there will be no interfer ence with free rotation of the fan drive The motor s should be operated for three hours at least onc...

Страница 30: ...le by contacting your Marley sales representative Replacement parts A complete stock of parts and components is main tained at one or more of the various Marley plants In cases of emergency they can normally be shipped within 24 hours by air freight if necessary However you would obviously benefit from anticipating your need in ad vance thus avoiding the cost of special handling Be sure to mention...

Страница 31: ... x x Lube lines 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 shaft sheave and belt alignment x Check belt tension and condition x x Check sheave bushing fastener torque x Fan Check and tighten blade and hub fasteners x Check fan blade pitch and tip...

Страница 32: ...unbalanced 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 motor RPM Check nameplate against power supply Check RPM of motor and drive ratio Bearing overgreased Remove bearing reliefs Run motor up to speed to purge excessive grease Wrong lubricant in bear...

Страница 33: ...shaft bearing Belt drive Grease bearings Scale or foreign substance in circulating water system Insufficient blowdown See Water Treatment section of this manual Water treatment deficiency Consult competent water treating specialist See Water Treatment section of this manual Cold water temperature too warm See Tower Operation Entering wet bulb temperature is above design Check to see if local heat ...

Страница 34: ...ield installation is required for fan guards double flow models piping inlets and piping outlets Some optional accessories such as handrails ladders and safety cages may also require field installation A separate installation drawing or manual for each purchased option is included in the document package along with bills of material If you have purchased an option and can t find the appropriate in...

Страница 35: ......

Страница 36: ...13 664 7400 spxcooling ct spx com spxcooling com In the interest of technological progress all products are subject to design and or material change without notice 2007 SPX Cooling Technologies Inc Printed in USA Balcke Hamon Dry Cooling Marley Cooling Technologies ...

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