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OPERATION

&

MAINTENANCE MANUAL

RC Series

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2
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Summary of Contents for RC Series

Page 1: ...OPERATION MAINTENANCE MANUAL RC Series...

Page 2: ......

Page 3: ...Construction Details Figure 1 Typical cross section...

Page 4: ...m may contain chemicals or biological contaminants including Legionella which could be harmful if inhaled or ingested Personnel exposed directly to the discharge airstream and the associated drift mis...

Page 5: ...it is torque adjusted at the factory CAUTION Do not use steam or high pressure water to clean PVC eliminators or materials other than steel CAUTION This equipment should never be operated without all...

Page 6: ...ly Annually Shutdown Inspect general condition of the unit 2 and check unit for unusual noise or vibration Inspect cold water basin Flush water distribution system Inspect spray nozzles Drain basin an...

Page 7: ...s 17 Fan Shaft 18 Access Door 18 Louvres and Eliminators 19 Water Distribution and Heat Transfer Section 20 Water Level Control PART 3 Corrosion Protection 23 Water Treatment 24 Corrosion and Scale Co...

Page 8: ...RC SERIES Operation and Maintenance INITIAL AND SEASONAL START UP EXTENDED SHUTDOWN PROLONGED OUTDOOR STORAGE 1...

Page 9: ...ated dirt and debris Remove clean and replace the basin strainer Inspection Conduct external inspection of the equipment Check for leaks corrosion and any structural damage Conduct internal inspection...

Page 10: ...flow level Start the unit pump and check for the proper rotation indicated by the arrow on the pump cover On installations where the unit pump was not furnished by BAC a globe valve should be installe...

Page 11: ...nd dirt from the interior and exterior of the unit Leave the cold water basin drain open so rain and melting snow will drain from the unit Clean the basin strainer and re install Cover the fan dischar...

Page 12: ...m freezing For protection against coil freeze up use of an inhibited glycol solution is recommended If protecting the coils with glycol is not possible the galvanized steel coils should be drained com...

Page 13: ...ipment or other sources must have the shaft locked to prevent any movement Precautions should be taken to prevent rodents snakes birds or other small animals from nesting inside the motors In areas wh...

Page 14: ...s of storage are just as important as pre shutdown procedures The motor should be thoroughly inspected cleaned and restored to its pre storage condition Inspect axial fans prior to start up to ensure...

Page 15: ...es COLD WATER BASIN FAN FAN DRIVE SYSTEM BELT DRIVE UNITS FAN DRIVE SYSTEM DIRECT DRIVE UNITS FAN MOTORS FAN SHAFT BEARINGS LOCKING COLLARS FAN SHAFT ACCESS DOOR LOUVRES AND ELIMINATORS WATER DISTRIBU...

Page 16: ...ate employed and the make up water supply pressure Check the operating water level monthly and readjust the float when necessary to maintain the recommended operating level Consult Water Level Control...

Page 17: ...hand and then by moving the blade tip up and down There should be no play or slippage Inspect each blade for excessive scale build up that could cause vibration Check each blade in the area of the sha...

Page 18: ...ed service intervals are as follows Initial Start Up If the equipment was supplied in assembled major sections no servicing is required prior to initial startup since the drive has been tensioned and...

Page 19: ...in Figures 3a and 3b Belt tension adjustment if required 1 Loosen the motor pulley guard retaining nuts 2 Loosen the lock nuts on the Motor Base Adjusting Screws 3 Turn the Motor Base Adjusting Screws...

Page 20: ...ld be no more than 1 5mm deviation from four points of contact In case of realignment loosen the motor sheave and align it with the fan sheave Allow 6mm for draw up as the bushing screw is retightened...

Page 21: ...aft turns freely 5 Wire the motor in accordance with the wiring diagram as shown on the motor nameplate and or in the motor terminal box 6 Turn on unit and check amp draw does not exceed nameplate rat...

Page 22: ...nt mineral base grease with a lithium thickener Lubricate the bearings as follows Initial Start up Normally no lubrication is required since the bearings have been lubricated at the factory prior to s...

Page 23: ...provided tangentially in the direction of rotation while holding the shaft 3 Retighten the set screw Fan Shaft The fan shaft is fabricated from stainless steel The exposed areas of the fan shaft are c...

Page 24: ...Points WARNING The access door should not be removed without first ensuring the fan and pump motors have been isolated tagged and locked in the off position Louvres and Eliminators Inspect regularly a...

Page 25: ...Check to see if the nozzles are all spraying consistently and producing the spray pattern shown in Figure 9 Clean any nozzles that are clogged If necessary the nozzle and rubber grommet may be remove...

Page 26: ...e Replace the valve seat if necessary Maintain the make up water supply pressure between 100 and 350 kPa for proper operation BAC recommends a surge protector provided by others for pressures over 350...

Page 27: ...he package consists of a probe type liquid level control assembly and a slow closing solenoid valve Stainless steel electrodes factory set at predetermined lengths extend from an electrode holder into...

Page 28: ...S Corrosion Protection WATER TREATMENT CORROSION AND SCALE CONTROL BIOLOGICAL CONTROL GRAY WATER AND RECLAIMED WATER CHEMICAL TREATMENT REQUIREMENTS PASSIVATION LONG TERM CARE OF STAINLESS STEEL SYSTE...

Page 29: ...as other system components In evaporative cooling products cooling is accomplished by evaporating a small portion of the recirculating water as it flows through the unit As the water evaporates the di...

Page 30: ...be operating 2 Bleed blowdown the continuous flow of a small portion of the re circulating water to drain is used to control the concentration of dissolved solids On rare occasions this may be adequa...

Page 31: ...warm oxygen and nutrient rich environment inside evaporative cooling equipment provides an ideal environment conducive to the growth of algae slime and other micro organisms Uncontrolled this can redu...

Page 32: ...rements The chemicals must be compatible with the unit materials of construction as well as other materials used in the system pipe heat exchanger chiller etc Chemical scale and corrosion inhibitors p...

Page 33: ...ess parts and care is taken to avoid scratching parts during processing Organic cleaners are used to clean the finished product prior to shipping Jobsite Considerations While stainless steel itself do...

Page 34: ...ron chips can start to rust reducing the corrosion resistance of the stainless steel and stain the surface giving the impression that the stainless steel is rusting These types of contaminants require...

Page 35: ...e materials being treated For example the standard coil outside is galvanized steel The inside of the coil is black carbon steel For finned coils the coil cleaning must be careful not to damage the fi...

Page 36: ...RC SERIES Bleed Rate 4...

Page 37: ...c in the recirculating water to the concentration of the same material in the make up water In order to optimise heat transfer efficiency and maximize equipment life bleed or blowdown a small amount o...

Page 38: ...RC SERIES Cold Weather Operation INSPECTION AND MAINTENANCE FAN SECTION ICING PROTECTION BASIN WATER AND INTERNAL PIPING FREEZE PROTECTION COIL FREEZE PROTECTION 5...

Page 39: ...climatic extremes which are expected the variations in heat load that will be encountered and the compatibility of the control system with other portions of the installation In subfreezing ambient te...

Page 40: ...er basin must be drained in dry operation For dry operation switch points and recommendations contact your local BAC representative Basin Water and Internal Piping Freeze Cold Water Basin Protection I...

Page 41: ...pply an auxiliary heat load to the circulating fluid and adjust the flow to ensure that fluid leaving the coil maintains the minimum required temperature Emergency Coil Drain RCF Only Do not drain the...

Page 42: ...RC SERIES Factory Authorised Parts THE PERFECT FIT 6...

Page 43: ...tible with other manufacturers equipment For Service and Preventative Maintenance BAC products are designed for long trouble free operation and BAC factory authorised parts provide everything you need...

Page 44: ...TOWERS ICE THERMAL STORAGE EVAPORATIVE CONDENSERS HYBRID PRODUCTS PARTS SERVICES w w w B a l t i m o r e A i r c o i l c o m a u 120 Wisemans Ferry Road Somersby NSW 2250 Telephone Australia 1300 134...

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