BAC PT2 User Manual Download

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OPERATION & MAINTENANCE MANUAL

PT2 Cooling Tower

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Summary of Contents for PT2

Page 1: ...OPERATION MAINTENANCE MANUAL PT2 Cooling Tower...

Page 2: ...pect and clean as necessary Start Up Monthly Quarterly Annually Shutdown Inspect general condition of the tower 2 and check unit for unusual noise or vibration Inspect cold water basin Flush water dis...

Page 3: ...20 Passivation 20 Biological Control 21 Long Term Care of Stainless Steel PART 4 Bleed Rate 23 Bleed Rate PART 5 Cold Weather Operation 24 Inspection Maintenance 24 Fan Section Icing Protection 25 Ba...

Page 4: ...ccordingly use appropriate lock out procedures Adequate safeguards including the use of protective enclosures where necessary should be taken with this equipment both to safeguard the public from inju...

Page 5: ...sure water to clean PVC eliminators or materials other than steel The services required to maintain a piece of evaporative cooling equipment are primarily a function of the quality of the air and wate...

Page 6: ...ol see page 30 For units with VFDs see page 30 For units with vibration cutout switches see page 28 Access Door Axial Fan Fan Guard Hot Water Distribution Fill BALTIDRIVE Power Train Internal Motor Sh...

Page 7: ...tester prior to the motor start up Except for the PT2 0412 prior to seasonal start up check and adjust the belt tension Prior to the initial start up the belt tension may not require adjustment as th...

Page 8: ...or vibrations For a 2 speed motor check to ensure the starter includes a minimum 15 second time delay when switching from high speed to low speed Check the operation of the optional vibration cutout...

Page 9: ...in is open to minimize stagnant buildup in the basin Motors and Drives BAC standard motors are designed for storage at ambient temperatures of 20 F to 104 F 28 9 C to 40 C Prolonged periods of exposur...

Page 10: ...ust be removed from the grooves of the sheaves before start up Controls If Ordered Insert desiccant bags into the control panel to absorb moisture Seal the control panel for storage Spray coat electri...

Page 11: ...no obvious corrosion between the hub and the fan blades Do not energize the fan if there is obvious corrosion of fan components Loose fan blades could result in fan failure and possible injury or dama...

Page 12: ...2 6 5 8 PT2 0814 and PT2 1214 11 6 5 8 PT2 1218 12 1 4 8 1 2 The operating water level in the cold water basin will vary with system thermal load evaporation rate the bleed rate employed and the make...

Page 13: ...bration Check each blade for any cracks If cracks are found the fan motor should be locked out until the fan is replaced Contact your local BAC Representative for assistance Tip Clearance Check the cl...

Page 14: ...ower Train BALTIDRIVE Power Train requires a periodic check of the belt condition and when necessary tension adjustment The recommended service intervals are as follows Initial Start up Externally Mou...

Page 15: ...ch attached to casing near motor door by loosening the plastic thumbscrew Using the supplied locking wrench wrench or impact gun turn the motor base adjusting screw Figures 4a and 4b clockwise to tens...

Page 16: ...nment check and adjustment Check the drive alignment annually to ensure maximum belt life Place a straight edge across the driver and the driven sheaves as shown in Figure 5 There should be no more th...

Page 17: ...00 3 Shell Gadus S3 T100 2 SKF LGHP2 Unocal 76 Unilife Grease Lubricate the bearings as follows Initial Start Up Normally no lubrication is required since the bearings have been lubricated at the fact...

Page 18: ...al water make up assembly is furnished as standard equipment on the unit The standard make up assembly consists of a corrosion resistant make up valve connected to a float arm assembly actuated by a p...

Page 19: ...to the overflow connection L E D Status Codes L E D on steady Indicates normal operation Steady one second flashing Indicates dirty probes reading in the capacitance mode The unit will still operate...

Page 20: ...mponents for signs of blemishes or corrosion See Long Term Care of Stainless Steel on page 21 for cleaning and care instructions TriArmor Corrosion Protection System Inspect components protected with...

Page 21: ...ed for corrosion and scale control without chemical treatment your water treatment specialist may recommend more conservative limits than those shown in Table 2 NOTES 1 Galvanized steel units require...

Page 22: ...aces are passivated the pH of circulating water should be kept between 6 5 and 8 2 and calcium hardness between 50 and 600 ppm as CaCO3 for four to eight weeks after start up or until new zinc surface...

Page 23: ...tact it is not immune to contamination from its surroundings Some common sources of surface contamination are Dirt and soil Shop oil or grease that may carry other contaminants such as metal chips Mac...

Page 24: ...ay be used where aesthetic considerations are not important followed by solvent cleaning with organic solvents as described above It is important to rinse the surface with warm water and wipe with a d...

Page 25: ...oncentration of dissolved solids for example chlorides sulfates etc in the recirculating water to the concentration of the same material in the make up water In order to optimize heat transfer efficie...

Page 26: ...r create a safety hazard The use of vibration cutout switches are highly recommended for unit operation in freezing weather If switches are installed be sure they are properly wired and tested regular...

Page 27: ...0 minutes at no more than 50 speed and the unit should be observed during this time Before returning to normal operation visually inspect the fan blades for ice formation Basin Water and Internal Pipi...

Page 28: ...nsor probe with 1 2 NPT mounting fitting has an on off relay output that de energizes the heaters whenever the basin water temperature is above 45 F 7 2 C or whenever the sensor probe is not fully sub...

Page 29: ...ce Operation when the sensor probe is encased in ice Disconnect the heater control panel and lock out tag out the circuit Remove the heater control panel cover Install a jumper wire across terminals G...

Page 30: ...ge or it can be reset manually Vibration Cutout Switch VCOS The Mechanical Vibration Cutout Switch and the Optional Electronic Vibration Cutout Switch should be tested and field adjusted at start up a...

Page 31: ...not occur thus permitting the system test without shutdown Calibration A light adjacent to the set point control comes on the instant the measured vibration level exceeds the set point The unit can b...

Page 32: ...ontrol must use inverter duty motors built in compliance with NEMA standard MG 1 Part 31 Operation of the unit at a speed which resonates with components of the drive system or support structure may r...

Page 33: ...ccelerometer provided by others to the vibration analyzer provided by others Be sure to route and fasten the wire so that it will not contact any rotating parts inside the unit when the drive system i...

Page 34: ...0 35 ips as the upper end of the lock out range Using this data a baseline for vibration history can be developed The vibration levels can be monitored yearly and the trend used to indicate potential...

Page 35: ...ections 3 or greater 5 Position the BAC supplied stainless steel backing ring gasket to the inside of the cold water basin 6 Position the flange to the outside of the cold water basin 7 Bolt the flang...

Page 36: ...WERS 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 7600 Dorsey Run Road Jessup MD 20794 Telephone 410 799 6200 Fax 410 799 6416...

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