HXI Hybrid Closed Circuit Cooling Tower
OPERATING AND MAINTENANCE INSTRUCTIONS
MHXIv10EN-SA
Page 1: ...HXI Hybrid Closed Circuit Cooling Tower OPERATING AND MAINTENANCE INSTRUCTIONS MHXIv10EN SA...
Page 2: ...dance with recognized Codes of Practice such as EUROVENT 9 5 6 ACOP HSC L8 Guide des bonnes pratiques Legionella et tours a ror frig rantes etc Water sampling test results and corrective actions shoul...
Page 3: ...ing X X X Disinfection X X X Drain Basin X depends on applied code of practice Notes 1 Water Treatment and auxiliary equipment integrated in the cooling system may require additions to the table above...
Page 4: ...ntrol 12 Chemical Treatment 12 Passivation 12 4 Cold Weather Operations 14 About Cold Weather Operation 14 Protection Against Sump Water Freezing 14 Capacity Control 14 Protection Against Coil Freezin...
Page 5: ...rcuit Cooling Towers 1 Air In 2 Air Out 3 Liquid In 4 Liquid Out 5 Wet Deck Surface 6 Cold Water Basin 7 Water Distribution System 8 Prime Surface coil 9 Spray Water Pump 10 Eliminators 11 Dry Finned...
Page 6: ...ard dry finned coil on the HXI Hybrid closed circuit cooling tower consists of a 6 row copper coil in a staggered triangle arrangement with precoated aluminum high density fins The coil is designed in...
Page 7: ...function of the process fluid return temperature 2 The three way valve is locked and closes the bypass line completely When working dry during winter the sump should be drained and power to the pump...
Page 8: ...g maintaining and repairing this equipment to prevent personal injury and or property damage Personnel must use personal protective equipment where necessary gloves ear plugs etc MECHANICAL SAFETY Mec...
Page 9: ...ions If the proper and required access means are not present temporary structures need to be foreseen Under no circumstance can one use parts of the unit that are not designed as an access mean unless...
Page 10: ...ing the water quality within the control guidelines Check and adjustments of blow down depends on the blow down device actual in use To prevent excessive build up of impurities in the circulating wate...
Page 11: ...ction 5 15 mg l max for 6 hours max 25 mg l max for 2 hours max 50 mg l max for 1 hour max Circulated Water Quality Guidelines for Stainless Steel Note Higher concentration of sulphates is allowed pro...
Page 12: ...ter treatment chemicals should be fed into the cooling system at the discharge of the recirculation pump The chemicals should not be fed in concentrated form nor batch fed directly into the cold water...
Page 13: ...passivation 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 Consult your water treatment...
Page 14: ...al shut down during the cold weather period it is recommended to drain the sump Drainage of the sump will also be needed if dry operation is anticipated even if sump heaters are installed These heater...
Page 15: ...sinus filters on the VFD to prevent bearing damage on fan motors Caution REFER TO FAN MOTOR NAMEPLATE DATA WHEN PROGRAMMING A VFD The purpose of a Low Level Cut out Switch for pump protection is to pr...
Page 16: ...ns cannot be met 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 For standard hot...
Page 17: ...anger coil is not guaranteed because of rising coil circuiting on the finned discharge coil optional and the risk for coil freeze up remains The local BAC Balticare representative should be consulted...
Page 18: ...deterioration of the metallic basin fittings When flushing the basin the strainers should be left in place to prevent the sediment from re entering the unit system After the basin has been flushed th...
Page 19: ...oved 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 The operating water le...
Page 20: ...ake up valve connected to a float arm assembly and actuated by a large diameter plastic float The float is mounted on an all thread rod which is held in place by wing nuts The operating water level in...
Page 21: ...er can drain freely Measure the blow down flow rate by recording the time needed to fill a given volume For automatic blow down using conductivity control ensure that the conductivity probe is clean a...
Page 22: ...the drive has been tensioned and aligned at the factory Also in this case it is recommended to always check drive alignment and belt tensioning If equipment was supplied completely knocked down KD the...
Page 23: ...nsion in the belt before measuring 3 Check belt tension by verifying both following conditions The deflection amounts 10 mm m free belt length see figure below The deflection force required is between...
Page 24: ...ning is required please proceed as follows 1 Loosen the lock nuts on the Motor Base Adjusting Screws 2 Turn the Motor Base Adjusting Screws clockwise to tension the belt or counter clockwise to reliev...
Page 25: ...an be set using the following procedure See Figure below 1 Stop fan s and pump s 2 Loosen the set screw 3 Using a drift pin centre punch tap the collar in the hole provided tangentially in the directi...
Page 26: ...otor starter should include a 15 seconds time delay when switching from high to low speed UNUSUAL NOISE AND VIBRATIONS Unusual noise and or vibration are the result of malfunctioning of mechanical com...
Page 27: ...t must never be applied at an angle to the surface of the fin but only in parallel to it Selecting a coil cleaner is important since the cleaner must neutralise and remove deposits on the surface of t...
Page 28: ...of the unit during fan cycling 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...
Page 29: ...ause it is only required for safe transport purposes 5 Make sure the profile of the combined inlet shields keeps the water inside the unit The correct position is with the horizontal part towards the...
Page 30: ...N 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 Inspection should includ...
Page 31: ...he motor Do not wash down the motor unless it is IP66 rated On a quarterly basis check electric connections motor protection devices amp draw motor bearings for noise overheating motor holding bolts e...
Page 32: ...moisture Under normal operating conditions the bearings should be greased every 1000 operating hours or at least every three months The bearings should be lubricated with one of the following water r...
Page 33: ...Total Fina Elf Multis 3 20 C to 120 C Grease Products ADJUSTABLE MOTOR BASE BELT DRIVEN UNITS The motor base adjusting screw see figure below should be coated every six months using a good quality cor...
Page 34: ...y be needed in case of high concentration of aerobic bacteria and or Legionella Disinfection is also recommended for evaporative cooling systems with known or suspected high bacteriological levels pri...
Page 35: ...oid loss of efficiency or an operational risk which may occur when non authorised parts are used Prolonged Outdoor Stay Should the unit s be stored outside prior to installation and or start up for ap...
Page 36: ...nded Code of Practice to keep your Cooling System efficient and safe Eurovent Cecomaf 2002 30p Guide des Bonnes Pratiques Legionella et Tours A ror frig rantes Minist res de l Emploi et de la Solidari...
Page 37: ...W W W B A L T I M O R E A I R C O I L C O Z A...
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Page 39: ...W W W B A L T I M O R E A I R C O I L C O Z A...
Page 40: ...STORAGE EVAPORATIVE CONDENSERS HYBRID PRODUCTS PARTS SERVICES www BaltimoreAircoil co za info BaltimoreAircoil co za Please refer to our website for local contact details PO Box 32088 7808 Ottery Cape...
