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8MAINTENANCE8.1 GENERAL8.6 WATER EXCHANGERMaintenance must be done by authorized centres or byqualified personnelThe maintenance allows to:maintain the unit efficiencyreduce the deterioration speed to whom every equipmentis subject over timeassemble information and data to understand the state ofthe unit efficiency and avoid possible damages8.2 INSPECTIONS FREQUENCYThe inspections should be carried out at least every six monthsThe frequency, however, depends on the use.In the event of frequent use it is recommended to planinspections at close intervals:frequent use (continuous or very intermittent use, nearthe operating limits, etc)critical use (service necessary).8.3 UNIT BOOKLETIt’s advisable to create a unit booklet to take notes of the unitinterventions.In this way it will be easier to adequately note the variousinterventions and aid any troubleshooting.Report on the booklet:datatype of intervention effectedintervention descriptioncarried out measures etc.It is very important for the exchanger to be able to provide themaximum thermal exchange. Therefore, it is essential for theinner surfaces to be clean of dirt and incrustations.Periodically check the difference between the temperature ofthe supply water and the condensation temperature. If thedifference is greater than 8°C–10°C it is advisable to clean theexchanger .The cleaning must be effected :with circulation in the opposite direction respect the normalonewith speed at least 1,5 times higher than the nominal onewith a suitable product moderately acid (95% water +5% phosphoric acid)after washing, rinse with water to inhibit the residues ofdetergent8.7 CIRCULATING PUMPSCheck :no leaksbearing status (anomalies are marked by abnormal noisesand vibrations)The closing of the terminal cover blocks and the correctcable gland positioning8.4 PUT AT RESTIf a long period of inactivity is foreseen:Turn off the power in order to avoid electrical risks ordamages by lightning strikesavoid the risk of frost (empty or add glycol to the parts ofthe system exposed to temperatures below zero, maintainpowered any anti-freeze resistances )It’s recommended that the starting-up after the stoppingperiod is performed by a qualified technician, especially afterseasonal stops or seasonal switch.When restarting, refer to what is indicated in the START-UPsection.Schedule technical assistance in advance to avoid hitchesand to guarantee that the system can be used when required.8.5 WATER FILTERCheck that no impurities prevent the correct passage of water.34
MAINTENANCE 88.8 CONTROL SHEETControls effected on ……………………..By……………………………...………………….of the Company ……………………………………………….STRUCTURE1. Presence of corrosionsHYDRAULIC CIRCUIT1. Water filter cleaning2. Check the exchanger efficiency3. Circulating pumpsELECTRICAL CIRCUIT1. Fixing control and cable insulation2. Electrical panel cleaning3. Capacity contactor status, terminal closing, cable insulation integrity4. Power-supply voltage and phase unbalancing (no load and on-load)5. Absorptions of the single electrical loads6. Test of the compressor crankcase resistancesREFRIGERANT CIRCUIT1. Leak check2. Operating parameters of the refrigerant circuitCONTROL AND CHECK1. Protective device test : safety valves, pressure switches, thermostats, flow switches etc2. Control system test: setpoint, climatic compensations, capacity stepping, air flow variations etc3. Control device test : alarm signalling, thermometers, probes, pressure gauges, etcNotes / interventions recommended to the owner*European regulation 303/2008:Refer to the local actuation regulations; in short and as an indication only the regulation prescribes that which follows.Companies and technicians that carry out installation, maintenance/repairs, leak control and recovery interventions must be CERTIFIED as prescribed bythe local regulations.The leak control must be carried out annually.35
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Page 3: INDEX1General 42Reception 63Positio
Page 6 and 7: 2RECEPTION2.1 PRELIMINARY INFORMATI
Page 8 and 9: 4WATER CONNECTIONS4.1 PRELIMINARY I
Page 10 and 11: 4 WATER CONNECTIONSINTERMEDIATE EXC
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Page 16 and 17: 6START-UPPRELIMINARY CHECKSSyntheti
Page 18 and 19: 6START-UP6.1 PRELIMINARY INFORMATIO
Page 20 and 21: 7CONTROL7.1 SYSTEM STRUCTURE12 3 4
Page 22 and 23: 7CONTROL7.4 SWITCHING ON AND OFFpre
Page 24 and 25: 7CONTROL7.7 ALARMSALARMSHOMEPAGEACT
Page 26 and 27: 7CONTROL7.8 MASTER - SLAVEMax. 10 u
Page 28 and 29: 7CONTROLMASTER SLAVE SWITCHING ON A
Page 30 and 31: IIIIIII? ESC? ESC? ESC? ESC? ESC? E
Page 32 and 33: IIIIII? ESC? ESC? ESC? ESC? ESC? ES
Page 36 and 37: 9DECOMMISSIONING9.1 DISCONNECTIONOn
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Page 42: 11RESIDUAL RISKSRefrigerantThe inte

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