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Construction Details

Figure 1. Typical cross section

Содержание RC Series

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

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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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