BAC FXVT 288 Series Operating And Maintenance Instructions Manual
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BAC FXVT 288 Series Operating And Maintenance Instructions Manual

Closed circuit cooling towers
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MFXVTv06EN
FXVT Closed Circuit Cooling Towers
OPERATING AND MAINTENANCE INSTRUCTIONS

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Summary of Contents for BAC FXVT 288 Series

  • Page 1 MFXVTv06EN FXVT Closed Circuit Cooling Towers OPERATING AND MAINTENANCE INSTRUCTIONS...
  • Page 2 Water sampling, test results and corrective actions should be recorded in the cooling system logbook. For more specific recommendations on keeping your cooling system efficient and safe, contact your local BAC Balticare service provider or representative. Name, e-mail and phone number can be found on the website www.BACService.eu.
  • Page 3 Inspections and monitoring Start- Weekly Monthly Quarterly Every 6 Annually Shutdown months Spray water pump Electric water level control package (option) TAB test (dip slides) Circulating water quality System overview Record keeping as per event Lubrication Start-Up Weekly Monthly Quarterly Every 6 Annually Shutdown...

  • Page 4: Table Of Contents

    Table of contents OPERATING AND MAINTENANCE INSTRUCTIONS Construction Details General Information Operating Conditions Connecting pipework Safety precautions Disposal requirements Non-walking surfaces Modifications by others Warranty Water Care About water care Biological control Chemical treatment Passivation Cold Weather Operations About cold weather operation Protection against sump water freezing Capacity control Protection against coil freezing...

  • Page 5: Construction Details

    FXVT CONSTRUCTION DETAILS 1. Spray water distribution system 2. Fan guard 3. Fan 4. Fan motor 5. Coil 6. Combined inlet shields 7. Cold water basin 8. Wet deck surface with integral drift eliminators 9. Coil connections 10. Removable drift eliminators 11.

  • Page 6: General Information

    PURGE REQUIREMENTS The installer of BAC closed circuit cooling towers must ensure a proper air purging of the system prior to operation. Entrained air can restrict the capacity of the cooler, resulting in higher process temperatures.

  • Page 7: Connecting Pipework

    Connecting pipework All piping external to BAC cooling equipment must be supported separately. In case the equipment is installed on vibration rails or springs, the piping must contain compensators to eliminate vibrations carried through the external pipework.

  • Page 8: Safety Precautions

    «critical speed». For more information consult your local BAC Balticare representative. W W W . B A L T I M O R E A I R C O I L . E U...

  • Page 9: Disposal Requirements

    Modifications by others Whenever modifications or changes are made by others to the BAC equipment without written permission of BAC, the party who has done the modification becomes responsible for all consequences of this change and BAC declines all liability for the product.

  • Page 10: Warranty

    BAC will guarantee all products to be free from manufactured defects in materials and workmanship for a period of 24 months from the date of shipment. In the event of any such defect, BAC will repair or provide a replacement.

  • Page 11: Water Care

    FXVT WATER CARE About water care In all cooling equipment, operating in evaporative mode, the cooling is accomplished by evaporating a small portion of the re-circulating water as it flows through the equipment. When this water evaporates, the impurities originally present in the water remain.
  • Page 12 ® Baltibond Hybrid Coating and SST304L 6.5 to 9.2 pH during initial passivation Below 8.2 (for units with HDG coil only) Total hardness (as CaCO 50 to 750 mg/l Total alkalinity (as CaCO 600 mg/l max. Total dissolved solids 2050 mg/l max. Conductivity 3300 µS/cm Chlorides...
  • Page 13 SST304L SST316L SST316L with HDG coil (with SST316L coil) 6.5 to 9.2 6.5 to 9.5 pH during initial passivation Below 8.2 Not applicable (for units with HDG coil only) Total hardness (as CaCO 50 to 750 mg/l 50 to 750 mg/l Total alkalinity (as CaCO 600 mg/l max.

  • Page 14: Biological Control

    5. If it is proposed to operate a treatment programme outside the BAC Water Quality Control Guidelines, the BAC factory warranty may be invalidated if the water quality is persistently outside the Control Guidelines, unless specific prior written BAC approval.
  • Page 15 ® Full stainless steel units and units protected by the Baltibond hybrid coating do not require passivation. An exception to this are units with a galvanized steel coil bundle which do still require the proper passivation procedure as described here in this section. In case you can't keep the pH below 8.2, a secondary approach is to conduct a chemical passivation using inorganic phosphate or film-forming passivation agents.

  • Page 16: Cold Weather Operations

    COLD WEATHER OPERATIONS About cold weather operation BAC cooling equipment can be operated in sub freezing ambient conditions provided the proper measures are taken. Listed below are general guidelines which should be followed to minimize the possibility of coil freeze-up.

  • Page 17: Protection Against Coil Freezing

    «critical speed» and below a minimum of 15 Hz for a belt driven unit (or direct driven fans) or 20 Hz for a unit with gear box. For more information consult your local BAC Balticare representative.
  • Page 18 If the process load is extremely light or shut off, it may be necessary to apply an auxiliary heat load during freezing conditions. Consult your local BAC Balticare representative for advice, if these conditions cannot be met. Draining of the coil(s) is not recommended as a normal method of freeze protection unless the coil(s) are constructed from stainless steel or are of the cleanable type.

  • Page 19: Maintenance Procedures

    FXVT MAINTENANCE PROCEDURES Checks and adjustments COLD WATER BASIN AND BASIN STRAINERS The cold water basin should be inspected regularly. Any debris which may have accumulated in the basin or on the strainers should be removed. Quarterly, or more often if necessary, the entire cold water basin should be drained, cleaned and flushed with fresh water to remove the silt and sediment which normally collects in the basin and under the wet deck surface during operation.
  • Page 20 OPERATING LEVEL AND MAKE-UP Before initial start up the straps, that prevent the float ball from moving during transport, as well as the protective bag around this ball, need to be removed. Fixation and wrapping of float ball As the water circulating through the unit is cooled, it collects in the cold water basin and passes through the strainers into the system.
  • Page 21 The make-up assembly should be inspected monthly and adjusted as necessary. The valve itself should be inspected annually for leakage and the valve seat replaced if necessary. The make-up water supply pressure should be maintained between 100 and 450 kPa for proper operation of the valve. The unit basin should be closely monitored and water level adjusted as necessary during the first 24 hours of operation.
  • Page 22 CAUTION Sump heaters can be hot. Sump heater DRIVE SYSTEM Belt Driven Units The drive system consists of a specially designed belt, a fan sheave and a motor sheave. The high efficiency belt provides the premium quality necessary for evaporative cooling equipment service. Together these components provide a highly reliable system with low maintenance requirements.
  • Page 23 Drive train 1. Fan sheave 2. Belt(s) 3. Motor sheave Belt Tensioning Check belt tension as follows: 1. Shut off fan(s). 2. Rotate the fan sheave half a turn to evenly distribute the tension in the belt before measuring. 3. Check belt tension by verifying both following conditions. The deflection amounts 10 mm / m free belt length (see figure below).
  • Page 24 CAUTION Over-tensioning of belts can lead to component damage. Deflection force (kg) Diameter (mm) Belt profile motor sheave Min. Max. 100 through 118 125 through 140 150 through 170 >180 Belt tension forces New belts have to be re-tensioned after 24 hours operation. If belt tensioning is required, please proceed as follows: 1.
  • Page 25 Prior to start-up, check all fittings on the gear drive to ensure that there are no visible leaks. The standard oils provided in BAC gear drive systems are mineral oils.
  • Page 26 4. Start the fan(s) and check for proper rotation as indicated by the arrow on the fan housing. If rotation is wrong stop fan(s) and contact BAC. W W W . B A L T I M O R E A I R C O I L . E U...

  • Page 27: Inspections And Corrective Actions

    Unusual noise and/or vibration are the result of malfunctioning of mechanical components or operational problems (e.g. unwanted ice formation). If this occurs, a thorough inspection of the entire unit followed by immediate corrective action is needed. If required, consult your local BAC Balticare representative for assistance. Inspections and corrective actions...
  • Page 28 Remove any obstructions from heat transfer section(s). Any damages or corroded areas need to be repaired. Call your local BAC Balticare representative for assistance. Minor fouling can usually be removed chemically or by temporary changes to the water treatment programme.
  • Page 29 Tie rod & straps for combined inlet shields 1. Turn-buckle 2. Tie straps 3. Inside view of unit 3. To remove the combined inlet shields, lift each section and pull at the lower end. Remove combined inlet shields 4. Reinstall the cleaned combined inlet shields. 5.
  • Page 30 Orientation of the combined inlet shield FAN SHAFT The exposed areas of the fan shaft are coated with a soft seal for added corrosion protection. It is recommended that the coating be inspected for continuity quarterly or at least every 6 months. Any signs of surface corrosion must be treated.
  • Page 31 Do not run/start the fan motor(s) when there is no heat load. SPRAY WATER PUMP The BAC pump contains a mechanical seal between pump housing and pump motor. This seal needs to be checked quarterly for proper operation and replaced if necessary.

  • Page 32: Lubrication

    ELECTRIC WATER LEVEL CONTROL PACKAGE (OPTIONAL) The electric water level control package (optional) maintains a constant water level in the cold water sump independent of cooling load changes and water supply pressure variations. Ensure every six months that all components (valve, float switches) are operational and clean. During commissioning the unit should be filled manually till overflow level (push float ball under) to prevent air suction of the pump during first start-up.
  • Page 33 MOTOR BEARINGS External motors with frame size >200L (>30kW) have grease fittings grease intervals: twice a year unless otherwise shown on the nameplate of the motor grease products: see below The bearings should be lubricated only with a hand grease gun. Do not use high pressure grease guns, since they may rupture the bearing seals.

  • Page 34: Gear Drive System

    ISO Grade should be as shown in the following tables: "Recommended Mineral Oils" and "Recommended Synthetic Lubricants" (reference the unit nameplate to determine if synthetic lubricant was furnished). For operation under extremely hot or cold ambient conditions, contact your local BAC Balticare Representative for specific recommendations.
  • Page 35 Ambient temperature at gear drive -29°C to 66°C AGMA Lubricant Number ISO Grade Manufacturer Oil type* Chevron Oil Co. Clarity 220 Synthetic Conoco Syncon 220 – R7 0 Oil Exxon Co. Teresstic SHP 220 Mobil Oil Corp. SHC 630 Shell Oil Co. Omala RL220 Recommended synthetic lubricants * List of brand names is for purpose of identifying types and is not to be construed as exclusive recommendations.

  • Page 36: Cleaning Procedures

    CAUTION Drain the excess oil before returning the gear drive to service. By following the above procedures, each BAC gear drive system will provide years of useful service. Cleaning procedures MECHANICAL CLEANING Keeping your evaporative cooling equipment (and the associated system) clean will maintain its efficiency and help to prevent uncontrolled bacteriological growth.
  • Page 37 6 hours. Higher chlorine levels for a shorter period are possible, but require a higher level of corrosion protection than galvanized steel only. Consult your BAC Balticare representative for further information.

  • Page 38: Comprehensive Maintenance

    Remove and store fan belts and access door gaskets. • Hot dip galvanized and stainless steel coils of BAC closed circuit cooling towers are filled with a low pressure inert gas at the factory before shipping, to ensure an optimal internal corrosion protection. It is recommended to check the overpressure every six months (connect a manometer to the valve).

  • Page 39: Further Assistance & Information

    FURTHER ASSISTANCE & INFORMATION Assistance BAC has established a specialized total care company called Balticare. The BAC Balticare offering involves all elements required to ensure a safe and efficient operation of your evaporative cooling products. For more details, contact your local BAC representative for further information and specific assistance at www.BaltimoreAircoil.eu...
  • Page 40 W W W . B A L T I M O R E A I R C O I L . E U...
  • Page 41 W W W . B A L T I M O R E A I R C O I L . E U...
  • Page 42 W W W . B A L T I M O R E A I R C O I L . E U...
  • Page 43 W W W . B A L T I M O R E A I R C O I L . E U...
  • Page 44 COOLING TOWERS CLOSED CIRCUIT COOLING TOWERS ICE THERMAL STORAGE EVAPORATIVE CONDENSERS HYBRID PRODUCTS PARTS, EQUIPMENTS & SERVICES www.BaltimoreAircoil.eu info@BaltimoreAircoil.eu Please refer to our website for local contact details. Industriepark - Zone A, B-2220 Heist-op-den-Berg, Belgium © Baltimore Aircoil International nv...

This manual is also suitable for:

Fxvt 364 seriesFxvt 288-qFxvt 364-q

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