BAC PCE Operating And Maintenance Instructions Manual
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BAC PCE Operating And Maintenance Instructions Manual

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MPCEv11EN
PCE Evaporative Condensers
OPERATING AND MAINTENANCE INSTRUCTIONS

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Summary of Contents for BAC PCE

  • Page 1 MPCEv11EN PCE Evaporative Condensers 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 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 months Fan shaft bearings...

  • Page 4: Table Of Contents

    Table of contents OPERATING AND MAINTENANCE INSTRUCTIONS Construction Details Typical section General Information Operating Conditions Connecting pipework Fan cycling for multi-fan models 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...

  • Page 5: Construction Details

    CONSTRUCTION DETAILS Typical section 11. Overflow 1. Fan guard 12. Strainer and anti-vortex hood 2. Axial fan 13. Make up assembly 3. Drive system 14. Fan motor 4. Eliminators 15. Sliding access door 5. Water distribution system 16. Heavy duty construction 7.

  • Page 6: General Information

    All connections (installed by others) must be leak free and tested accordingly. To verify absence of non condensables in the refrigeration system, follow the instructions in the BAC Application Handbook – EU Edition (https://www.baltimoreaircoil.eu/downloads/pdf-Application-Handbook-EU-Edition), Section "Condenser Engineering Guidelines".

  • 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. The equipment outlet piping must be installed under the operating level of the equipment to prevent air suction and pump cavitation.

  • Page 8: Disposal Requirements

    When the equipment is operated with a variable fan speed control device, steps must be taken to avoid operating at or near to the fan's «critical speed». For more information consult your local BAC Balticare representative. ELECTRICAL SAFETY All electrical components associated with this equipment should be installed with a lockable disconnect switch located within sight of the equipment.

  • Page 9: Modifications By Others

    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 10: Water Care

    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. Unless a small amount of water is drained from the system, known as blow down, the concentration of dissolved solids will increase rapidly and lead to scale formation or corrosion or both.
  • Page 11 ® 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 12 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 13: 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 14 ® 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 15: 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 16: Frp Propeller

    «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 17: Maintenance Procedures

    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 during operation.
  • Page 18 Cold water basin and basin strainer 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 19 Operating water level 1. Operating height 2. Overflow Operating heights for evaporative cooling equipment are indicated in the table below: Model Operating height (measured from pan bottom) (mm) Cold water basin operating heights If a float operated water make-up is used, initial setting and regular adjustments are needed. The float controlling the make-up valve is mounted on a threaded rod, held in place by wing nuts.
  • Page 20 To check the operating level, proceed as follows: 1. Remove combined inlet shields. 2. Measure height from sump bottom to water level and compare with face value from table. 3. Check valve for leakage and replace valve, if necessary. 4. Check that float arm can move freely and that float ball floats and closes valve. 5.
  • Page 21 CAUTION No service work should be performed on the drive system without first ensuring the fan and pump motors have been isolated, tagged and locked in the off position. Drive system with external motor 1. Fan motor 2. Motor sheave 3.
  • Page 22 Fan belt check and adjustment 1. Fan sheave 2. Belt 3. Motor sheave 4. 10 mm/m deflection = proper belt tension 5. Straight edge CAUTION Over-tensioning of belts can lead to component damage. Deflection force (kg) Diameter (mm) Belt profile motor sheave Min.
  • Page 23 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. 5 Maintenance Procedures 5 Maintenance Procedures...

  • Page 24: Inspections And Corrective Actions

    (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. Units operated with Variable Frequency Drive (VFD) might operate close to the proper frequency of the unit, resulting in resonance.
  • Page 25 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 26 4. Shut off pump(s). 5. Clean water distribution from dirt and debris. Ensure spray branches and nozzles are in place and clean. Replace damaged or missing nozzles. 6. Reinstall eliminators and ensure they fit tightly with no gaps. 7. Close the sliding access doors. 8.
  • Page 27 1. To remove the combined inlet shields, lift each section and pull at the lower end. Remove combined inlet shields 2. The supporting steel strip does not need to be reinstalled because it is only required for safe transport purposes. 3.
  • Page 28 Location of fan shaft bearings and lube fittings 1. Lubrication fitting 2. Bearing 3. Extended lubrication line 4. Fan shaft AXIAL FAN Due to its size and speed, the axial fan has great potential for injury and destruction if damaged. Inspect closely, and as required, replace damaged or deteriorating fan blades.
  • Page 29 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 30: 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 31: Cleaning Procedures

    MOTOR BEARINGS Motor bearings are greased for bearing life. GREASE PRODUCTS Shell Alvania grease RL3 -20°C to +120°C Texaco Multifak Premium 3 -30°C to +140°C Klüber Isoflex LDS Special A -50°C to +120°C Mobil Mobilith SHC 100 -40°C to +175°C Total Fina Elf Multis 3 -20°C to +120°C...
  • Page 32 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 33: Comprehensive Maintenance

    Remove and store fan belts and access door gaskets. • Hot dip galvanized and stainless steel coils of BAC condensers 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 34: 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 35 W W W . B A L T I M O R E A I R C O I L . E U...
  • Page 36 W W W . B A L T I M O R E A I R C O I L . E U...
  • Page 37 W W W . B A L T I M O R E A I R C O I L . E U...
  • Page 38 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...

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