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SPX Cooling Technologies Marley MH Fluid Cooler Figure Figure, #+.3#2%73, 3%.3!2$7!2% 4/2

Models: Marley MH Fluid Cooler

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SINGLE MOTOR—TWO FANS

See Figure 3 for MH Fluid Cooler models MHF706 and MHF707.The belts are adjusted by turning the threaded rod. Before tightening or loosening the belt, the double nuts holding the motor support in place must be loosened. There are two jam 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-

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SINGLE MOTOR—SINGLE FAN

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SPX Cooling Technologies Marley MH Fluid Cooler user manual Figure Figure, #+.3#2%73, 3%.3!2$7!2% 4/2, Single Motor-Twofans

Contents

VŽiÊNÊ “œ˜ÊÀÞÊ œœˆ˜ÊNÊ ÀiÞ Marley MH Fluid Coolerœœˆ˜Ê/iV…˜œœˆiÃ Page Contents Preparation Safety FirstPreparation Fluid Cooler LocationHoisting Fluid Cooler InstallationFluid Cooler Shipment Receiving Fluid CoolerInstallation Fluid Cooler InstallationInstallation Motor WiringWhen using a starter per NEMA MG-1,part When using a two-speed starterWhen using a VFD Installationequipment. Electrical savings can be large during periods of low ambient temperature when the cooling requirement can be satisfied at reduced speeds. To benefit from these advantages, it is important that the drive be installed correctly InstallationInstallation Mechanical Equipment4.Momentarily bump energize the motors and observe rotation of the fans. If rotation is backwards, shut off the fan and reverse two of the three primary leads supplying power to the motor InstallationWater System OperationFluid Cooler Start-Up 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 OperationOperation Fluid Cooler OperationGeneral fan acceleration time of 30 seconds per hour Wintertime OperationOperation 1.Do not allow the fluid coolers leaving process fluid temperature to drop below 45F. If such low temperature operation is necessary or beneficial to your process, establish the minimum allowable level as follows OperationOperation Intermittent Wintertime OperationProtection Against Coil Freezing 1.Maintain sufficient flow rate through the coil OperationOperation Water Treatment and BlowdownMaintaining Water Quality Blowdown MaintenanceFluid Cooler Cleaning Maintenance Belt TensioningSINGLE MOTOR-TWOFANS Figure Figure#+.3#2%73 3%.3!2$7!2% 4/2SHEAVE Sheave AlignmentMaintenance FAN SHAFT SHEAVEMaintenance Fluid Cooler MaintenanceBushing Fastener Torque Values Weekly Inspect for bacterial growth and general operation conditions. Bacterial growth should be reported to your water treatment expert for immediate attention MaintenanceMaintenance Motor Relubrication InstructionsMaintenance Seasonal Shutdown InstructionsMaintenance Prolonged ShutdownMaintenance SPX Cooling Technologies ServicesSemi-annually Maintenance ScheduleMaintenance Service MonthlyRemedy TroubleshootingTrouble CauseRemedy TroubleshootingTrouble CauseAdditional Information Page Manual 05-116D Cooling TechnologiesBalcke Hamon Dry Cooling Marley