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SPX Cooling Technologies MHF702, MHF705 user manual Operation

Models: MHF702 MHF705

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Draining the coil is not acceptable as a normal method of freeze

Operation

	Model	Coil Volume	Model	Coil Volume
	Model	Liters	Model	Liters
		Liters		Liters

	MHF702__061	246	MHF705__061	890

	MHF702__081	322	MHF705__081	1192

	MHF702__101	397	MHF705__101	1476

	MHF702__121	473	MHF705__121	1760

	MHF702__062	284	MHF705__062	1079

	MHF702__082	379	MHF705__082	1438

	MHF702__102	454	MHF705__102	1779

	MHF702__122	568	MHF705__122	2139

	MHF703__061	322	MHF706__061	1476

	MHF703__081	435	MHF706__081	1893

	MHF703__101	530	MHF706__101	2309

	MHF703__121	644	MHF706__121	2744

	MHF703__062	379	MHF706__062	1798

	MHF703__082	492	MHF706__082	2309

	MHF703__102	625	MHF706__102	2839

	MHF703__122	757	MHF706__122	3350

	MHF704__061	606	MHF707__061	1703

	MHF704__081	795	MHF707__081	2196

	MHF704__101	984	MHF707__101	2688

	MHF704__121	1173	MHF707__121	3180

	MHF704__062	719	MHF707__062	2158

	MHF704__082	946	MHF707__082	2801

	MHF704__102	1192	MHF707__102	3426

	MHF704__122	1420	MHF707__122	4054

When the use of industrial antifreeze solutions is not possible, the system must be operated to meet both of the following conditions.

1.Maintain sufficient flow rate through the coil.

2.Maintain sufficient heat load on the process fluid. Fluid exiting the coil must be maintained at or above 7°C. Cycling of the recirculation pump should not be used to control process temperatures.

Draining the coil is not acceptable as a normal method of freeze

Noteprotection—draining promotes corrosion inside the coil tubes. Drain- ing is acceptable in an emergency if the coil is not protected by an antifreeze solution.

It is recommended that you discuss your freeze prevention options with your local Marley sales representative.

19

Image 19

SPX Cooling Technologies MHF702, MHF705 Operation, Draining the coil is not acceptable as a normal method of freeze

Contents

User Manual sea05-116E Marley MH Fluid CoolerPage Contents Preparation Safety Firstto be sure that all safety considerations have been addressed Fluid Cooler LocationItisnot intended nor assumed that access tothe fan deck onsingle-flow Those are only some of the safety issues that may arise in the designHoisting Fluid Cooler InstallationTower Shipment Receiving Fluid CoolerInstallation Fluid Cooler InstallationWhen using a starter Motor WiringInstallation Before beginning, ensure that the motor is rated for “Inverter Duty” When using a two-speed starterWhen using a VFD InstallationImproper 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 damage that may have occurred during its operation. SPX Cooling Technologies does not assume responsibility for any technical support or damages for problems associate with non-Marley brand VFD systems InstallationInstallation Mechanical Equipment10 - 60 hrs. of operation. See Bushing Fastener Torque Values on page InstallationFluid Cooler Start-Up OperationWater System 7. While operating the recirculating water pumps and prior to operat- ing the cooling tower fan, execute one of the two alternative biocidal treatment programs described in the following OperationGeneral Fluid Cooler OperationOperation Operation Wintertime Operationfan acceleration time of 30 seconds per hour Operation Slushy, transitory ice forms routinely in the colder regions of the fill of low temperature towers, and is visible through the tower louvers. Such ice normally has no adverse effect on fluid cooler operation, but its appearance should be a signal to the operator to undertake ice control proceduresProtection Against Coil Freezing Intermittent Wintertime OperationOperation Draining the coil is not acceptable as a normal method of freeze OperationWater Treatment and Blowdown MaintenanceMaintaining Water Quality Blowdown Fluid Cooler CleaningMaintenance Maintenance Belt TensioningWhen water treatment chemicals are added, they should not be in JACKING SCREWS MOTOR JACKING SCREWSMOTOR SINGLE MOTOR-TWO FANSSTRAIGHT EDGE Sheave AlignmentMaintenance FAN SHAFT SHEAVEBushing Fastener Torque Values Fluid Cooler MaintenanceMaintenance Semi-Annually If equipped, check the belt tension and condition Maintenanceoil designed specifically for these Geareducers. If, after five years Motor Relubrication InstructionsMaintenance Open and lock out disconnect switch to make certain motor cannotMaintenance Seasonal Shutdown Instructionson page Maintenance Prolonged ShutdownMaintenance SPX Cooling Technologies ServicesSemi-annually Maintenance ScheduleMaintenance Service MonthlyRemedy TroubleshootingTrouble CauseRemedy TroubleshootingTrouble CauseAdditional Information Page SPX COOLING TECHNOLOGIES MALAYSIA Sdn Bhd seaM05-116E