Related Manuals for BAC FXVS-0806 12 Series
Summary of Contents for BAC FXVS-0806 12 Series
- Page 1 MFXVS-v12-EN FXVS 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 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 Fan motor Spray water pump Electric water level control package (option) Level or alarm switches TAB test (dip slides) Circulating water quality System overview Record keeping as per event Lubrication Start-Up Weekly...
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Page 4: Table Of Contents
About comprehensive maintenance Prolonged outdoor stay Further Assistance & Information The service expert for BAC equipment More information W W W . B A L T I M O R E A I R C O I L . C O M... -
Page 5: Construction Details
FXVS CONSTRUCTION DETAILS 1. Spray water distribution system 2. Propeller fan 3. Fan motor 4. Motor sheave 5. Fan sheave 6. Drive system 7. Wet deck surface with integral drift eliminators 8. Combined inlet shields 9. Removable drift eliminators 10. Coil 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 representative. W W W . B A L T I M O R E A I R C O I L . C O M... -
Page 9: Disposal Requirements
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. For more details, please refer to the Limitation of Warranties applicable to and in effect at the time of the sale/purchase of these products. -
Page 11: Water Care
FXVS 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 12 ® Baltibond Hybrid Coating and SST304L 6.5 to 9.2 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 300 mg/l max. Sulfates* 350 mg/l max.* Total suspended solids 25 mg/l max.
- Page 13 SST304L SST316L SST316L with HDG coil (with SST316L coil) 6.5 to 9.2 6.5 to 9.5 Total hardness (as CaCO 50 to 750 mg/l 0 to 750 mg/l Total alkalinity (as CaCO 600 mg/l max. 600 mg/l max. Total dissolved solids 2050 mg/l max. 2500 mg/l max.
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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.
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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 freeze-up. As... - Page 17 «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 representative.
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Page 18: Protection Against Coil Freezing
-14°C ambient temperature and 20 m/s velocity. 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 representative for advice. 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 Appr. minimum heat load (kW) Model numbers Minimum flow Unit with FXVS (l/s) Standard unit positive closure (kW) damper hood (kW) FXVS-0806x-12x-xx FXVS-0806x-16x-xx FXVS-0806x-20x-xx FXVS-0806x-24x-xx FXVS-0806x-28x-xx FXVS-0806x-30x-xx FXVS-0806x-32x-xx FXVS-0806x-36x-xx FXVS-0809x-12x-xx FXVS-0809x-16x-xx FXVS-0809x-20x-xx FXVS-0809x-24x-xx FXVS-0809x-28x-xx FXVS-0809x-30x-xx FXVS-0809x-32x-xx FXVS-0809x-36x-xx FXVS-0812x-12x-xx FXVS-0812x-16x-xx FXVS-0812x-20x-xx FXVS-0812x-24x-xx FXVS-0812x-28x-xx FXVS-0812x-30x-xx...
- Page 20 Appr. minimum heat load (kW) Model numbers Minimum flow Unit with FXVS (l/s) Standard unit positive closure (kW) damper hood (kW) FXVS-1212x-12x-xx FXVS-1212x-16x-xx FXVS-1212x-20x-xx FXVS-1212x-24x-xx FXVS-1212x-28x-xx FXVS-1212x-30x-xx FXVS-1212x-32x-xx FXVS-1212x-36x-xx FXVS-1218x-12x-xx FXVS-1218x-16x-xx FXVS-1218x-20x-xx FXVS-1218x-24x-xx FXVS-1218x-28x-xx FXVS-1218x-30x-xx FXVS-1218x-32x-xx FXVS-1218x-36x-xx Minimum requirements for water flow and heat load The "x"...
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Page 21: Maintenance Procedures
FXVS 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 22 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 23 The "x" represents the variable numbers or characters in the model numbers. The operating water level in the cold water basin will vary somewhat with system thermal load (evaporation rate), the bleed rate employed and the make-up water supply pressure. Because the typical winter load is less than the summer load, the winter evaporation rate is frequently less than the summer evaporation rate.
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Page 24: Drive System
BLOW DOWN In case of a continuous blow down with a metering valve in the bleed line, ensure that the valve is unobstructed and that blow down water can drain freely. Measure the blow down flow rate by recording the time needed to fill a given volume. - Page 25 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 1. Fan motor 2. Motor sheave 3. Belt 4. Cast aluminium fan sheave 5.
- Page 26 CAUTION Fan has to be blocked while replacing belts. 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...
- Page 27 Drive Alignment Proper drive alignment ensures maximum belt life. Alignment is checked for standard drives after correct belt tensioning by placing a straight-edge across both sheaves as shown in the figure below. Sheave alignment standard drives 1. Motor sheave 2. Fan sheave 3.
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Page 28: 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 representative for assistance. Inspections and corrective actions... -
Page 29: Water Distribution
4. After inspection, install eliminators and access doors and start pump(s) and fan(s). Remove any obstructions from heat transfer section(s). Any damages or corroded areas need to be repaired. Call your local BAC representative for assistance. Minor fouling can usually be removed chemically or by temporary changes to the water treatment programme. - Page 30 Inspect regularly and remove foreign objects that might impair air passage. Replace broken and missing parts when necessary. Failure to replace broken shields will result in water loss due to splash out. You can remove the combined inlet shields by simply unscrewing a single tapper on both ends of the air intake side.
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Page 31: Axial Fan
Orientation of the combined inlet shield FAN SHAFT AND BUSHINGS The exposed areas of the fan shaft and bushings 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 32: Fan Motor
• Excessive vibration • Deterioration of fan assembly Correct or adjust if necessary. Before any disassembly, fan blades and hub should be match marked to ensure proper blade pitch angle when reassembled. CAUTION No service work should be performed on or near the fans, motors, and drives or inside the unit without first ensuring the fan and pump motors have been isolated, tagged and locked in the off position. - Page 33 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. The warranty coverage for pump seals is subject to certain limitations. Damages, primarily attributed to issues such as sticky seals, dry running, chemical attacks, and pollution by solids, fall outside the scope of our comprehensive warranty.
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Page 34: 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 35: Motor Bearings
For grease products see table below. MOTOR BEARINGS Motor bearings are greased for bearing life. 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. -
Page 36: Cleaning Procedures
Adjustable motor base 1. Motor base adjusting screw 2. Adjustable motor base 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. The recommended cleaning procedures are described below: 1. - Page 37 Consult your BAC representative for further information. Excessive levels of chlorine must be avoided as this quickly can lead to corrosion and damage to your system.
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Page 38: Matrxdrive
FXVS MATRXDRIVE™ Fan Array System (Option) The basis for the air movement system of the FXVS unit are direct driven axial fans with permanent magnet motors. Each PM motor has an individual integrated speed controller, which can be piloted either through an analog 0-10V / 4-20 mA signal or over a digital bus system (Modbus RTU or Modbus TCP / BACnet MSTP or BACnet IP). - Page 39 3-fan unit 1. Fan closest to terminal box (Fan 1) 2. Middle fan (Fan 2) 3. Fan furthest from terminal box (Fan 3) KEYPAD KEYS AND DESCRIPTION 6 MATRXDRIVE™ 6 MATRXDRIVE™ W W W . B A L T I M O R E A I R C O I L . C O M...
- Page 40 LPC keys Description [Status] Indicates the status of the drive and/or the motor. Select between 3 different readouts by pressing [Status]: 5 line readouts, 4 line readouts, or smart logic control. Press [Status] for selecting the mode of display or for changing back to display mode from either the quick menu mode, the main menu mode, or the alarm mode.
- Page 41 MATRXDRIVE™ FANS CONTROLLED THROUGH ANALOG SIGNAL For analog control, the fan speed will be proportional with the input signal. With no speed setpoint, the fan will automatically run at emergency speed as show on below graphic. Speed is linear to voltage between 1V to 10V (4mA to 20mA).
- Page 42 MATRXDRIVE™ FANS CONTROLLED THROUGH MODBUS COMMUNICATION In case of Modbus communication, the fan speed will be proportional with the speed reference signal on address 2811 as shown on below graphic. When the speed reference signal is below 10% , the fan will automatically run at the speed defined in parameter 311 (300 rpm by default).
- Page 43 Modbus Display Signed/ Default Conversion Unit Read/ Description Unsigned Write Address mode value factor 2810 None RUN/STOP command: run command = 1148, stop command = 1084, coast to stop command = 1140 2811 Speed reference signal, refer to the below table. 3410 32 bits word Unsigned...
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Page 44: Warnings And Alarms
Speed (%) 2811 1638 3277 4915 6554 8192 9830 11469 13107 14746 16384 Speed reference table WARNINGS AND ALARMS Below table contains all warnings or alarms that can be triggered. A warning is issued when an alarm condition is impending, or when an abnormal operating condition is present and may result in the drive issuing an alarm. - Page 45 Alarm Word Alarm word Alarm word 2 Parameter 16-90 Alarm Parameter 16-91 Alarm word Word 2 00000001 Brake check (A28) Servicetrip, read/write 00000002 Pwr.card temp (A69) Servicetrip (reserved) 00000004 Earth fault (A14) Servicetrip, typecode/spare part 00000008 Ctrl.card temp (A65) Servicetrip (reserved) 00000010 Ctrl.
- Page 46 Warning Word Warning word Warning word 2 Parameter 16-92 Parameter 16-93 Warning word Warning Word 2 00000001 Brake check (W28) Start delayed 00000002 Pwr.card temp (A69) Start delayed 00000004 Earth fault (W14) Reserved 00000008 Ctrl.card temp (W65) Reserved 00000010 Ctrl. word TO (W17) 00000020 Overcurrent (W13) Reserved...
- Page 47 Extended status Word Ext. status word Ext. status word 2 Parameter 16-94 Ext. status word Parameter 16-95 Ext. status word 00000001 Ramping 00000002 AMA running Hand/auto 00000004 Start CW/CCW Profibus OFF1 start_possible is active, when the DI selection [12] or [13] are active active and the requested direction matches the reference sign 00000008...
- Page 48 Ext. status word Ext. status word 2 00200000 2097152 Local reference Sleep reference site = REMOTE -> auto on pressed & active 00400000 4194304 Protection mode notification Sleep boost 00800000 8388608 Unused Running/pipe filling 01000000 16777216 Unused Drive bypass 02000000 33554432 Unused Emergency mode 04000000...
- Page 49 MATRXDRIVE™ FANS CONTROLLED THROUGH BACNET COMMUNICATION In case of BACnet communication, the fan speed will be proportional with the speed reference signal on AV:1 as shown on below graphic. When the speed reference signal is below 10%, the fan will run at 300 RPM. Fan speed for BACnet control signal Specific parameter info In below table a list of the most important BACnet objects is shown including their object ID, conversion factor...
- Page 50 Object ID Object name Default value Conversion factor Unit Read/Write AV: 28 Heat sink temp. 0 °C °Deg AV: 61 Alarm word None AV: 62 Alarm word 2 None AV: 63 Warning word None AV: 64 Warning word 2 None Additional information can be found in the Danfoss VLT HVAC Drive FC 102 programme guide.
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Page 51: Comprehensive Maintenance
To order factory authorized parts, contact your local BAC representative. Make sure you include the unit serial number when ordering any parts. -
Page 52: Further Assistance & Information
Upgrades and new technologies - save up energy and improve maintenance by upgrading your system. • Water treatment solutions - equipment for controlling corrosion scaling and proliferation of bacteria. For more details, contact your local BAC representative for further information and specific assistance at www.BACservice.eu More information REFERENCE LITERATURE •... - Page 53 W W W . B A L T I M O R E A I R C O I L . C O M...
- Page 54 W W W . B A L T I M O R E A I R C O I L . C O M...
- Page 55 W W W . B A L T I M O R E A I R C O I L . C O M...
- Page 56 COOLING TOWERS CLOSED CIRCUIT COOLING TOWERS ICE THERMAL STORAGE EVAPORATIVE CONDENSERS HYBRID PRODUCTS PARTS, EQUIPMENTS & SERVICES www.BaltimoreAircoil.com Europe@BaltimoreAircoil.com 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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