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USE AND MAINTENANCE MANUAL

WATER COOLED WATER CHILLERS

AND HEAT PUMPS

R-PWE / R-PWH / EWH

Rev. 1 02/09

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Summary of Contents for EWH series

Page 1: ...USE AND MAINTENANCE MANUAL WATER COOLED WATER CHILLERS AND HEAT PUMPS R PWE R PWH EWH Rev 1 02 09...

Page 2: ......

Page 3: ...ction pag 13 4 3 Handling pag 14 4 4 Arrangements and placing pag 17 4 5 Hydraulic connections pag 19 4 5 1 Evaporator pag 20 4 5 2 Condenser pag 20 4 5 3 Hydraulic connections for PWE Heat pumps pag...

Page 4: ...ful information Pay the maximum attention to the paragraphs marked with this symbol 1 3 Referring standards The units of R PWE R PWH EWH series are designed and manufactured in compliance with the rel...

Page 5: ...the unit Only qualified and trained technicians must perform any operation on the machine Donottouchthemachineifwithbarefeetorwithhumidor wetparts ofthebody Do not perform any cleaning operation befo...

Page 6: ...s The unit can be closed by case panels in this case the dangerous parts inside the unit are not accessible from outside Only qualified and trained personnel can remove the covering panels The unit is...

Page 7: ...evaporator or shell tube evaporator with heat insulation Stainless steel AISI 316 weld brazed plate evaporator or shell tube evaporator Cooling circuit composed of thermostatic expansion valve sight...

Page 8: ...ance Manual Watercooled chillers and Heat Pumps R PWE R PWH EWH Rev 1 del 02 09 RWE PWE multicompressor Pict 2 RWH PWH mono multicompressor Pict 3 Key 1 Electric panel 2 Compressor 3 Condenser 4 Evapo...

Page 9: ...Use and Maintenance Manual Watercooled chillers and Heat Pumps R PWE R PWH EWH Rev 1 del 02 09 3 3 Cooling circuit Pict 4 Pict 5 7...

Page 10: ...HIGH PRESSURE GAUGE WC WATER COIL CO CONDENSER PIL LOW PRESSURE GAUGE WD WATER CHARGE AND DISCAHRGE VALVE CT CONDUCTIVITY PROBE PIW WATER VALVE WE WATER EXCHANGER EF FAN PRV OVERPRESSURE DISCHARGE DEV...

Page 11: ...F DEHYDRATING FILTER SFO FREON OIL HEAT EXCHANGER LS SIGHT GLASS SL NOISE LEVEL REDUCER LT LIQUID RECEIVER SO OIL SEPARATOR NR NON RETURN VALVE SV SHUT OFF VALVE OF OIL FILTER TS SAFETY THERMOSTATIC V...

Page 12: ...1800 750 892 1082 1212 1512 1852 K R407C 2500 1800 750 2462 3102 3822 K R407C 3000 1800 750 341 401 491 591 282 352 402 492 592 Ka R134A 1500 1600 750 711 971 1201 772 972 1222 Ka R134A 1500 1800 750...

Page 13: ...450 1933 2203 2493 K R407C 5200 2450 2000 91 111 131 151 171 Ka R134A 2430 1525 800 211 241 271 321 361 Ka R134A 3350 1525 850 421 481 541 621 Ka R134A 3700 1900 1300 182 222 Ka R134A 3750 1710 750 25...

Page 14: ...nocircuit MV Buffer tank it is composed of water tank expansion vessel safety valve hydrometer water charge and discharge valve air discharge valve model RWE monocircuit M12 Modulating capacity contro...

Page 15: ...very important to check the packing integrity immediately upon delivery In case the packing is found damaged it is necessary to accept the goods with reservation and indicate on the consignment note t...

Page 16: ...t of some models is unbalanced check the unit stability before starting to handle it For any unit handling please follow the instructions shown in Pictures 11 12 and 13 In case the fork lift is employ...

Page 17: ...Use and Maintenance Manual Watercooled chillers and Heat Pumps R PWE R PWH EWH Rev 1 del 02 09 Pict 12 Lifting of scroll multicompressor units 15...

Page 18: ...ssor units In case the manufacturer lifting kit option is not employed make sure that the lifting equipment used the cables and the belts are in compliance with the relevant local regulation The overa...

Page 19: ...and executing the machine installation The unit installation must comply with local existing laws Before placing the unit the following points must be checked Connections for electric and hydraulic ci...

Page 20: ...e and Maintenance Manual Watercooled chillers and Heat Pumps R PWE R PWH EWH Rev 1 del 02 09 Pict 15 Service Area for multicompressor scroll units Pict 16 Service Area for multicompressor screw units...

Page 21: ...rm the piping path in such a way so as to limit as much as possible the pressure drop in the system The water circulating pump must be able to deliver the appropriate water flow capacity with the nece...

Page 22: ...ture 1 6 3 7 6 1 8 9 12 1 15 8 19 8 24 8 Percentage of propylene glycol 5 10 15 20 25 30 35 40 Freezing temperature 1 7 3 4 5 3 7 5 10 13 2 16 8 21 6 Pict 17 Piping connection diagram Keys 1 Manometer...

Page 23: ...r while the cold water produced in the evaporator is sent to an exchanger where the released heat is absorbed In order this operation to take place in practice the hydraulic system must be realized fo...

Page 24: ...ressure back to its orginal value Repeat the operation until no air goes out from the air discharge valves Make sure the water pressure in the system always ranges between 1 5 and 3 5 bar 4 6 Electric...

Page 25: ...re perfoming any operation it is advisable to check the charge of the battery as per the instructions Power the control Press the button I O Check parameter N4 For further information check the contro...

Page 26: ...on A user terminal board Pict 21 is available with free contacts designed for Generic alarm state 1 Unit remote ON OFF 2 Check the wiring diagram for the exact correspondence of the terminals numbers...

Page 27: ...nal heat protection can be enabled If necessary reset the correct rotation direction by inverting two out of three phases in the input terminals of the main switch 5 2 First startup The first startup...

Page 28: ...oes not work See trouble 1 B The control system setting is not correct Check the setting of the control system 2 Cooled water temperature C The compressor does not work See trouble 11 too high D The c...

Page 29: ...st be discharged and recharged after the vacuum execution E Too hot water at the condenser Check capacity of the condensation water cooling system F Condensing water flow capacity insufficient See tro...

Page 30: ...FF position Then also turn the unit main switch to OFF position Only trained technicians are alllowed to perform operations with powered electrical panel and with open panel board since some functions...

Page 31: ...er to the male charge connection 1 4 SAE placed on the liquid line letting some gas go out to remove the air in the connection pipe Turn the cylinder upside down and charge the liquid up to reach 75 o...

Page 32: ...Check the gas temperatature on the compressor intake Pict 22 by means of a thermometer Pict 23 The overheating intake value is given by the difference between the temperature shown on the thermometer...

Page 33: ...conductors insulation status x Check of evaporator water temperature difference x Liquid sight glass check x Electric absorption check x Working pressures check x Unit general conditions check x Probe...

Page 34: ...the refrigerant gas by means of an adequate receiver in order to protect people and environment Never release the gas contained in the cooling circuit in the environment When dismantling the unit or w...

Page 35: ......

Page 36: ......

Page 37: ...Emicon A C S p a si riserva la possibilit di apportare modifiche o cambiamenti ai propri prodotti senza nessun preavviso...

Page 38: ...Emicon A C S p a Via A Volta 49 Meldola Tel 39 0543 495611 Fax 39 0543 495612...

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