PCE Evaporative Condensers
OPERATING AND MAINTENANCE INSTRUCTIONS
MPCEv11EN
Page 1: ...PCE Evaporative Condensers OPERATING AND MAINTENANCE INSTRUCTIONS MPCEv11EN ...
Page 2: ...sis thereafter in accordance with recognized Codes of Practice such as EUROVENT 9 5 6 ACOP HSC L8 Guide des bonnes pratiques Legionella et tours aéroréfrigérantes etc 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 Balticare service provider...
Page 3: ...ng X X X Disinfection X X X Drain basin and pump 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 Contact suppliers for recommended actions and their required frequency 2 Recommended service intervals are for typical installations Different environmental conditions may dictate more freque...
Page 4: ...re 10 Biological control 13 Chemical treatment 13 Passivation 13 4 Cold Weather Operations 15 About cold weather operation 15 Protection against sump water freezing 15 Capacity control 15 FRP propeller 16 5 Maintenance Procedures 17 Checks and adjustments 17 Inspections and corrective actions 24 Lubrication 30 Cleaning procedures 31 6 Comprehensive Maintenance 33 About comprehensive maintenance 33...
Page 5: ...guard 2 Axial fan 3 Drive system 4 Eliminators 5 Water distribution system 7 Combined inlet shields 8 Cold water basin 10 Drain 11 Overflow 12 Strainer and anti vortex hood 13 Make up assembly 14 Fan motor 15 Sliding access door 16 Heavy duty construction 17 Coil inlet connection 18 Coil 19 Coil outlet connection 20 Spray pump PCE 1 ...
Page 6: ...HFC refrigerants and sensitive system components such as electronic expansion devices or semi hermetic compressors The installer must take the necessary precautions on site to safeguard the operation of these components in conjunction with the condenser coils Maximum spray pressure 14 kPa If pump s are installed by others it is recommended to install a pressure gauge at the inlet of the water dist...
Page 7: ...es If there is doubt about safe and proper rigging installation operation or maintenance procedures contact the equipment manufacturer or his representative for advice When working on operating equipment be aware that some parts may have an elevated temperature Any operations on elevated level have to be executed with extra care to prevent accidents CAUTION Do not cover units with PVC eliminators ...
Page 8: ...ge after unit shut down Wait five minutes after disconnecting the voltage at all poles before opening the fan motor terminal box LOCATION All cooling equipment should be located as far away as possible from occupied areas open windows or air intakes to buildings LOCAL REGULATIONS Installation and operation of cooling equipment may be subject to local regulations such as establishment of risk analy...
Page 9: ...ree 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 You can find these terms and conditions on the reverse side of your order a...
Page 10: ...ust be an ongoing programme of monitoring in place to ensure the water treatment system is maintaining 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 water a small amount of water must be bled from the system at a rate to be determined by the water treatm...
Page 11: ...d the sum of chlorides sulfates parameters does not exceed 650 mg l for Baltibond SST304L Baltiplus protection pH 6 5 to 9 0 pH during initial passivation Below 8 2 Total hardness as CaCO3 50 to 600 mg l Total alkalinity as CaCO3 500 mg l max Total dissolved solids 1500 mg l max Conductivity 2400 µS cm Chlorides 250 mg l max Sulfates 250 mg l max Total suspended solids 25 mg l max Chlorination as ...
Page 12: ...Higher concentration of sulphates is allowed provided the sum of chlorides sulphates parameters does not exceed 650 mg l for SST304L and 1500 mg l for SST316L For Ozone water treatment application Stainless steel 316L execution is required Ozone levels are to be maintained to 0 2 ppm 0 1 ppm for at least 90 of the time with absolute maximum peaks of 0 5 ppm Cycles of concentration are the ratio of...
Page 13: ...ause corrosion Preferably the water 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 sump of the evaporative cooling equipment 3 BAC specifically discourages acid dosing as mean of scale control unless under certain strict circumstances for open circui...
Page 14: ...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 Consult your water treatment specialist for specific recommendation W W W B A L T I M O R E A I R C O I L E U 14 ...
Page 15: ... weather period it is recommended to drain the sump and pump Drainage of the sump and pump will also be needed if dry operation is anticipated even if sump heaters are installed These heaters will NOT prevent sump water from freezing during dry operation at sub freezing ambient conditions Remote sump installations are best suited for a flexible switch from wet to dry operation as the sump water is...
Page 16: ...ult your local BAC Balticare representative When operating with VFD drives above nominal frequency be aware of the potential risk for motor overload or mechanical damages It is recommended to provide 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 17: ...diment can become corrosive and cause 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 the strainers should be removed cleaned and replaced before refilling the basin with fresh water CAUTION Do not use acid to clean the strainers Remote Basin The wate...
Page 18: ...xation 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 level is controlled by the make up valve and should be maintained at the operating water level shown in the table below Operating height is the water level above sump bottom during operation W W W B A L T I M ...
Page 19: ...ting fill the sump with water until 2 cm above operating level Adjust the wing nuts of the float ball so that the make up valve is completely closed Before starting the unit for the first time fill the sump till 1 cm below overflow level push float ball under Under normal load conditions this setting should produce the correct operating level At low load conditions the operating level will rise an...
Page 20: ... clean Also ensure that control and safety devices such as low level cut out switches are operational clean and properly incorporated into the control circuit CAUTION Sump heaters can be hot DRIVE SYSTEM Belt Driven Units The drive system consists of a specially designed belt a fan sheave and a motor sheave The high efficiency belt provides the premium quality necessary for evaporative cooling equ...
Page 21: ...tating the motor base adjustment screw Check belt tension as follows 1 Shut off fan s 2 Rotate the fan sheave half a turn to evenly distribute the tension 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 the minimum and maximum values given in the table ...
Page 22: ... 24 hours operation If belt tensioning 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 relieve belt tension During adjustment of belt tension the drives should be rotated several times by hand to evenly distribute the tension throughout the belt 3 When the be...
Page 23: ...ove side access panel s 2 Loosen the set screw 3 Using a drift pin centre punch tap the collar in the hole provided tangentially in the direction of rotation while holding the shaft 4 Re tighten the screw 5 Close unit access door and start pump s and fan s Locking collar assembly 1 Locking collar 2 Lubrication fitting 3 Set screw hole ROTATION OF FAN S AND PUMP S Fans must rotate without obstructi...
Page 24: ...unctioning 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 Balticare representative for assistance Units operated with Variable Frequency Drive VFD might operate close to the proper frequency of the unit resulting in resonance This...
Page 25: ...t within acceptable levels are the key to prevent fouling DRIFT ELIMINATORS The inspection procedure is as follows 1 Shut off fan s and pump s and visually check eliminators for obstructions damages cleanliness proper fit 2 If any of the above problems have been observed stop fan s and pump s and remove eliminators 3 Clean eliminators from debris and foreign matter Remove dirt and obstructions Rep...
Page 26: ...HIELDS Combined inlet shields are installed at the air inlet side These will prevent UV light from shining into the sump water and will reduce the suction of large airborne impurities and debris In addition they will prevent water from splashing out of the air intake side of the unit during fan cycling Inspect regularly and remove foreign objects that might impair air passage Replace broken and mi...
Page 27: ...art facing downwards to the inside of the unit Orientation of the combined inlet shield FAN SHAFT The exposed areas of the fan shaft 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 This involves 1 Removal of the protective coating with a suit...
Page 28: ...nder and fan guard and these should be inspected for Fan blade tip clearance Pitch angle Bolt torque 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 ...
Page 29: ...arting the 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 external surface of motor for corrosion If the motor is equipped with space heaters these must be activated when the motor is idle in order to prevent condensation inside the motor CAUTION Do n...
Page 30: ... 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 resistant inhibited greases which are good for ambient temperature ranging from 20 C to 120 C Ball bearing 1 Bearing with locking collar 2 Lubrication fitting 3 Extended lubrication line The bearings should be lubric...
Page 31: ...he recommended cleaning procedures are described below 1 Disconnect fan and pump motor s and shut off make up supply 2 Remove combined inlet shields eliminators and drain system Do not remove sump strainer 3 Clean debris from exterior and fan s with soft brush if necessary use water and soap 4 Clean interior with soap water and soft brush if necessary use high pressure water jet 5 Remove any debri...
Page 32: ...disinfection staff Typically disinfection is achieved using a sodium hyper chloride solution to maintain a residual value of 5 15 mg l of free chlorine and circulate this around the system for up to 6 hours Higher chlorine levels for a shorter period are possible but require a higher level of corrosion protection than galvanized steel only Consult your BAC Balticare representative for further info...
Page 33: ... avoid 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 approximately one month shelf life or longer or stored in severe climates it is imperative that certain actions be performed by the installing contractor in order to maintain the unit in as shipped c...
Page 34: ...frigérantes Ministères de l Emploi et de la Solidarité Ministère de l Economie des Finances et de l Industrie Ministère de l Environnement Juin 2001 54p Voorkom Legionellose Minsterie van de Vlaamse Gemeenschap December 2002 77p Legionnaires Disease The Control of Legionella Bacteria in Water Systems Health Safety Commission 2000 62p Hygienische Anforderungen an raumlufttechnische Anlagen VDI 6022...
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