Galletti LCA Series, Installation, Use And Maintenance Manual

Page 1: ...GB Installation use and maintenance...

Page 2: ...lation clearance requirements General guidelines for plumbing connections Water connection to the evaporator Safety valve drain pipes Electrical connections Generalities Electrical connections of diff...

Page 3: ...pressure switch Minimum pressure switch Service thermostat Anti freeze thermostat Anti recycle timer Oil differential pressure switch ROUTINE MAINTENANCE AND CHECKS Warnings Generalities Repairing the...

Page 4: ...LCA RG66000986 Rev 00 4...

Page 5: ...ry The fluids under pressure in the cooling circuit and the presence of electrical components may cause hazardous situations during installation and maintenance work Therefore only qualified personnel...

Page 6: ...to suitable waste disposal or recycling facilities in order to minimise their environmental impact SITING You should bear in mind the following aspects when choosing the best site for installing the...

Page 7: ...n on roofs or intermediate storeys the unit and pipes must be insulated from walls and ceilings by placing rigid rubber joints in between and using supports that are not rigidly anchored to the walls...

Page 8: ...his reason it is necessary to guarantee the following clearances see figure on this page rear side plumbing connections min 1 5 metres to guarantee access to plumbing connections and or for any necess...

Page 9: ...from scale or impurities present in the pipes air vent valves to be placed at the highest points of the water circuit for the purpose of bleeding air The internal pipes of the unit are fitted with sma...

Page 10: ...thermal inertia of the water itself is lower it is a good idea to check that the water content in the section delivering to users satisfies the condition below V water content in user section m3 Sh s...

Page 11: ...e of water cannot harm people This is a standard feature of units equipped with the optional storage reservoir Warning When making the plumbing connections make sure there are no open flames in proxim...

Page 12: ...uations exceeding 5 and the unbalance between phases must always be below 2 The above operating conditions must always be complied with failure to ensure said conditions will result in the immediate i...

Page 13: ...elves see annexed wiring diagram All remote controls work with a very low voltage 24 Vac supplied by the insulating transformer on the electric control board REMOTE SUMMER WINTER SWITCHING If you wish...

Page 14: ...cating function desired is maintained Check that the plumbing connections have been properly made according to the indications given on the plates to be found on the unit itself proper inlet and outle...

Page 15: ...a few bubbles is however allowed especially in the case of high glide ternary mixtures such as HFC R407C A few minutes after the compressors have started up check that the end of condensation tempera...

Page 16: ...property of refrigerant mixtures If pure fluids are used the phase change occurs at a constant T and thus the glide is equal to zero STOPPING THE UNIT To stop the unit press the OFF unit on the front...

Page 17: ...temperatures are possible but for such applications the Manufacturer should be consulted at the time the order is placed The maximum temperature of the water entering the evaporator is 20 C To allow...

Page 18: ...croprocessor control and are protected by passwords TABLE II SETTING OF CONTROL DEVICES CONTROL DEVICE SET POINT DIFFERENTIAL Service thermostat C C 12 2 Service thermostat H C 40 2 TABLE III SETTING...

Page 19: ...the pressure falls below the set differential see Table III MINIMUM PRESSURE SWITCH The low pressure switch stops the compressor when the intake pressure falls below the set value for more than 180 se...

Page 20: ...control It imposes a minimum time lapse of 300 seconds between two successive starts Never attempt to change the delay set in the factory wrong settings could cause serious damage to the unit OIL DIFF...

Page 21: ...ins electricity supply The upper part and outlet pipe of the compressor may reach temperatures as high as 110 C Be especially careful when working in the surrounding area while the unit is running Be...

Page 22: ...o be replenished Check the efficiency of the flow switch or differential pressure switch Check the heating elements where present of the compressor crankcases Clean the metal mesh filters mounted exte...

Page 23: ...T To achieve a hard vacuum in the cooling circuit it is necessary to use a pump capable of generating a high degree of vacuum i e 15 Pa of absolute pressure If there is no suitable vacuum pump availab...

Page 24: ...re the correct percentages of the three constituents Introduce refrigerant through the inlet in the liquid line A unit that was originally charged with R407C in the factory cannot be charged with R22...

Page 25: ...cially for the considerable quantities of copper and aluminium present in the unit This will make the job of waste collection disposal and recycling facilities easier and minimise the environmental im...

Page 26: ...no back suction occurs Check whether the effective RMS voltage to the fans is the maximum If necessary check the pressure transducers controlling the revolution regulator where present optional Check...

Page 27: ...ace the filter Low condensation T Check the efficiency of the condensation control device where present Low level of refrigerant Check the refrigerant level by measuring the degree of undercooling if...

Page 28: ...plete Error in parameter settings Check the setting of the start and end defrost parameters on the microprocessor Check whether defrosting water is properly drained from the coils Check the uniformity...

Page 29: ...9 Vista dall alto Top view 1960 265 1164 1 Water inlet 2 gas 2 Water outlet 2 gas 3 Power supply input 4 Electric control board 5 Refrigerant pressure gauges optional 6 Advanced control microprocesso...

Page 30: ...58 936 158 870 466 Vista dall alto Top view 2360 265 9 Center of gravity with empty tank 1 Water inlet 2 gas 2 Water outlet 2 gas 3 Power supply input 4 Electric control board 5 Refrigerant pressure g...

Page 31: ...ll alto Top view 3140 407 870 5 9 1 2 5 6 7 37 5 1197 1493 5 85 Center of gravity with empty tank 1 Water inlet 2 gas 2 Water outlet 2 gas 3 Power supply input 4 Electric control board 5 Refrigerant p...

Page 32: ...alto Top view Frontale Front view Laterale Side view Retro Rear view 3 9 Center of gravity with empty tank 1 Water inlet 2 gas 2 Water outlet 2 gas 3 Power supply input 4 Electric control board 5 Refr...

Page 33: ...tro Rear view 1 2 Vista dall alto Top view 3 Center of gravity with empty tank 1 Water inlet 2 gas 2 Water outlet 2 gas 3 Power supply input 4 Electric control board 5 Refrigerant pressure gauges opti...

Page 34: ...SURE DROPS The diagram shows the pressure drops on the water side Dpw as a function of the water flow rate Qw assuming an average water temperature of 42 5 C 0 0 20 40 60 80 100 120 Qw l h 20 000 140...

Page 35: ...B B B C Available head LCA with standard pump nominal flow rate kPa 79 74 123 117 116 159 Rated electrical output standard pump kW 0 55 0 55 0 75 0 75 0 75 1 50 Operating current standard pump A 1 7...

Page 36: ...40010 Bentivoglio BO Via Romagnoli 12 a Tel 051 8908111 Fax 051 8908122 www galletti it...