Marley Quadraflow, User Manual

Page 1: ...Quadraflow cooling tower INSTALLATION OPERATION MAINTENANCE sea_Z0238885_D ISSUED 8 2018 READ AND UNDERSTAND THIS MANUAL PRIOR TO OPERATING OR SERVICING THIS PRODUCT user manual ...

Page 2: ...ions 18 Motor Relubrication Instructions 19 Prolonged Shutdown 19 Additional Services 20 Additional Information 21 Troubleshooting 22 The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk levels or to important information concerning the life of the product Note Indicates presence of a hazard which can cause severe personal injury...

Page 3: ...uestions about the operation and or maintenance of this cool ing tower and you don t find the answers in this manual please contact your Marley sales representative When writing for information or when ordering parts pleaseincludetheserialnumbershownonthecoolingtowernameplate Tower Location Space available around the tower should be as generous as possible to pro mote ease of maintenance and to pe...

Page 4: ...tor Our subcon tractors provide safe efficient assembly which complies with all requirements for five year warranty protection of your tower by SPX Motor Wiring Wire motor leads as shown on the motor nameplate matching the supply voltage Do not deviate from the motor nameplate wiring Internal space heaters may be present depending upon the motor manufac turer For space heater operation and wiring ...

Page 5: ...limit amp draw to nameplate amps during cold weather opera tion 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 30 me ters a DV DT output filter is recommended to avoid damage to the motor 30 meters distance is based on our field experience the ...

Page 6: ...e responsibility for any technical support or damages for problems associate with non Marley brand VFD systems Changing the operational fan speed from the factory settings could cause the fan to operate in an unstable region which may result in damage to the equipment and possible injury Mechanical Equipment Always make certain that mechanical equipment is inoperable during periods of maintenance ...

Page 7: ...heat load General The cold water temperature obtained from an operating cooling tower will vary with the following influences 1 Heat Load With the fan in full operation if the heat load increases the cold water temperature will rise If the heat load reduces the cold water temperature will reduce Note that the number of degrees range through which the tower cools the water is established by the sys...

Page 8: ...the motor can be restarted Fan cycling limits Considering the normal fan and motor sizes utilized on Quadraflow towers anticipate that approximately 4 to 5 starts per hour are al lowable If your tower is equipped with a two speed motor greater opportunity for temperature control is afforded you When the water temperature becomes too cold switching the fan to half speed will cause the cold water te...

Page 9: ... entire hot water basin and hot water inlet Make sure that cold water suction screens are clear and installed in place 4 Fill the water system to an approximate depth of 76mm in the elevated section of the cold water basin This is the recommended operating water level Adjust the float valve so that it is essentially closed at that level Continue filling the system until the water reaches a level a...

Page 10: ...ithout circulating stagnant water over the cooling tower fill or operating the cooling tower fan After biocidal pretreatment has been successfully completed cooling water may be circulated over the tower fill with the fan off When biocidal treatment has been maintained at a satisfactory level for at least six hours the fan may be turned on and the system returned to service Resume the standard wat...

Page 11: ...page 8 However in towers of more than one cell where fans are manipulated sequentially please realize that the water temperature will be significantly lower in the cell or cells operating at the highest fan speed than the net cold water temperature produced by the entire tower would indicate Wintertime operation of multicell towers at low cold water temperature levels requires that the operator be...

Page 12: ...ontrol during freezing weather Towers must not be operated with reduced water rate and or no heat load during freezing weather If the circulating water system cannot be shut down water returning from the process should be made to bypass the tower If a bypass is used all water must be bypassed without modulation If the water bypass is directly into the tower s cold water basin its design must be ap...

Page 13: ...oevaporate Although the water lost by evaporation is replenished by the makeup system it exits the tower as pure water leaving behind its burden of dissolved solids to concentrate in the remaining water Given no means of control this increasing concentration of contaminants can reach a very high level In order to achieve water quality which is acceptable to the cooling tower as well as the remaind...

Page 14: ...e water treatment professional to clean and treat your cooling tower See Tower Startup section of this manual Cooling towers must be cleaned and disinfected regularly in accordance with ASHRAE Standard 188 and Guideline 12 Workers performing decontamination procedures must wear personal protective equipment PPE as directed by their facility safety officer Cooling towers must be visually inspected ...

Page 15: ...urning the power back on Service personnel must wear proper personal protective clothing and equipment Weekly Visually inspect the cooling tower to assess general operating conditions and for signs of microbial growth and appearance of debris scale and corrosion Refer to ASHRAE Standard 188 and Guideline 12 for specific frequency recommendations Consult a knowledgeable water treatment professional...

Page 16: ...gion including the fan guard Use torque settings prescribed on the fan nameplate To maintain five year change intervals use only oil designed specifi callyfortheseGeareducers If afterfiveyears turbine typemineraloil is used the oil must be changed semiannually Refer to Geareducer User Manual for oil recommendations and further instructions Annually Inspect the tower thoroughly making maximum use o...

Page 17: ...x Check for loose driveshaft or coupling fasteners x Check driveshaft flex element for unusual wear x x Lube lines Check for oil leaks in hoses or fittings x x Fan Check and tighten blade and hub fasteners x Check fan blade pitch and tip clearance x Check fan cylinder for loose fasteners x Motor Lubricate as required R Check mounting bolts for tightness x Operate at least 3 hours a month 3 hours a...

Page 18: ...ft service manual Fan Check fan assembly bolting and tighten as required Use torque settings prescribed on the fan nameplate Refer to fan service manual Fan Motor Clean and lubricate motor if required at close of each operating season refer to motor manufacturer s recommendations Does not apply to motorswithsealedbearings Checkmotoranchorboltsandtightenasrequired Do not start motor before determin...

Page 19: ...t apply to motors with sealed bearings FiberglassComponents Checkallfiberglasspartsforexposedglassfibers If found the affected surfaces should be roughened up and solvent wiped Surfaces must be clean and dry and free of oil grease or other contaminants before applying new coating The best coating system requires using a two part polyamide epoxy primer to promote adhesion and a two part acrylic pol...

Page 20: ...and operating characteristics intended A complete stock of all parts and components is maintained 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 advance thus avoiding the cost of special handling Be sure to mention your tower serial number f...

Page 21: ...assembly and instal lation These drawings and manuals contain important information relating to safe installation and operation of the cooling tower A separate installation drawing for each purchased option is included in the document package If you have purchased an option and can t find the ap propriate installation drawing contact your local Marley sales representative before proceeding SPX als...

Page 22: ...cket fits or bearing Rotor unbalance Rebalance Cooling fan hitting end bell guard Reinstall or replace fan Motor runs hot Wrong voltage or 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 ...

Page 23: ... shaft with dial indicator Replace if necessary Fan noise Blade rubbing inside of fan cylinder Adjust cylinder to provide blade tip clearance Loose bolts in blade clamps Check and tighten if necessary 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 Wate...

Page 24: ...nological progress all products are subject to design and or material change without notice SPX COOLING TECHNOLOGIES MALAYS IA Sdn Bhd UNIT 505 BLOCK B PHILEO DAMANSARA 2 NO 15 JALAN 16 11 OFF JALAN DAMANSARA 46350 PETALING JAYA MALAYSIA 60 3 7947 7800 th my enquiry spx com spxcooling com Quadraflow USER MANUAL ...