Galletti LCWC055 Installation, Maintenance, Usage Download Page 3

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RG66001652_REV.02

LCW - LCR

TABLE OF CONTENTS

OPERATING LIMITS

Water flow to evaporator

Chilled water temperature

External water temperature

Operation with water at low temperatures

SETTING OPERATING PARAMETERS

Generalities

Maximum pressure switch

Minimum pressure switch

Service

thermostat

Antifreeze

thermostat

Anti-recycle

timer

ROUTINE MAINTENANCE AND CHECKS

Warnings

Generalities

Repairing the cooling circuit

Tightness

test

Hard vacuum and drying of cooling circuit

Charging with R407C refrigerant

Environmental

protection

RETIRING THE UNIT

TROUBLESHOOTING

Summary of Contents for LCWC055

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

Page 2: ...rements General guidelines for plumbing connections Water connection to the evaporator Instructions for the filling up of the rank Safety valve drain pipes Electrical connections Generalities Remote c...

Page 3: ...SETTING OPERATING PARAMETERS Generalities Maximum pressure switch Minimum pressure switch Service thermostat Antifreeze thermostat Anti recycle timer ROUTINE MAINTENANCE AND CHECKS Warnings Generalit...

Page 4: ...RG66001652_REV 02 4 LCW LCR Dichiarazione di conformit La dichiarazione di conformit allegata ad ogni macchina Declaration of conformity The declaration of conformity is attached to each unit sold...

Page 5: ...ine servicing Field of Application The LCW units are designed to cool heat water and solutions containing up to 30 glycol percentage by weight in civil industrial and technological air conditioning sy...

Page 6: ...eat exchangers with braze welded AISI 304 austenitic stainless steel plates and connections made of AISI 304 L characterised by a reduced carbon content to facilitate brazing Braze welded plate exchan...

Page 7: ...erature set point of the chiller inlet water temperature o Alarm management High low pressure Antifreeze Flow switch Pump alarm o Alarm signalling o Display of operating parameters o Antifreeze protec...

Page 8: ...circuit Plate heat exchanger Scambiatore a piastre Thermostatic valve Valvola termostatica Filter dryer Filtro deidratore Liquid receiver Ricevitore di liquido Sight glass Spia di flusso Check valve V...

Page 9: ...heat exchanger Scambiatore a piastre Thermostatic valve Valvola termostatica Filter dryer Filtro deidratore Liquid receiver Ricevitore di liquido Sight glass Spia di flusso Check valve Valvola di non...

Page 10: ...cuit Plate heat exchanger Scambiatore a piastre Thermostatic valve Valvola termostatica Filter dryer Filtro deidratore Liquid receiver Ricevitore di liquido Sight glass Spia di flusso Check valve Valv...

Page 11: ...separator Separatore liquido Plate heat exchanger Scambiatore a piastre Thermostatic valve Valvola termostatica Filter dryer Filtro deidratore Liquid receiver Ricevitore di liquido Sight glass Spia di...

Page 12: ...nnected from the power supply Inspection Conveyance Siting Inspection on receipt On receiving the unit check that it is perfectly intact the machine left the factory in perfect conditions immediately...

Page 13: ...installation As special care has been taken in the sound insulation and sealing of the components and hot parts in general they need not be installed in dedicated rooms It is advisable to place a rigi...

Page 14: ...l mesh filter incoming pipes with a mesh not to exceed 1 mm to protect the exchanger from scale or impurities present in the pipes This prescription is particularly important at first start up air ven...

Page 15: ...inertia of the water is lower it is a good idea to check that the water content in the section delivering to users satisfies the condition below Ns Sh Cc V V water content in user section m3 Sh speci...

Page 16: ...s concerning the cavitation of the pump It is of fundamental importance for the installer to follow and check the instructions written below stepwise so as to avoid every kind of risks concerning the...

Page 17: ...e Only qualified personnel may choose and install the piping and carry out the final braze welding operations as per current laws and regulations Said personnel must issue a new declaration of conform...

Page 18: ...the fact that in the case of rising lines the pressure drop due to the travel height reduces the undercooling of the liquid resulting in the possible formation of flash vapours in this case choose a l...

Page 19: ...m the pressure in the tank corresponds to the T of the surrounding environment a withdrawal of refrigerant charge will cause pressure drops which will be associated with withdrawal of refrigerant char...

Page 20: ...lenoid valve of the charging machine allows the passage of refrigerant liquid toward the charging gun and flow is measured by the volumetric flow rate gauge the quantity in weight is calculated by mea...

Page 21: ...ring the refrigerant Refrigerants all tend to dissolve in oil compressor sump in percentages that are directly proportional to increases in pressure and decreases in the T of the oil itself Charles La...

Page 22: ...n of the lubricant in any case first check the compatibility between the crankcase capacity and the required charge volumes Safety valve drain pipes A safety valve is present on the refrigerant circui...

Page 23: ...warranty The electrical connections must be made in accordance with the information shown in the wiring diagram provided with the unit and current regulations An earth connection is mandatory The inst...

Page 24: ...ble the machine to start Make sure there are no refrigerant leaks that may have been caused by accidental impacts during transport and or installation Check the power supply to the crankcase heating e...

Page 25: ...running in the wrong direction in the case of a phase sequence error Position the Local Remote selector SLR situated at the top middle of the electric board on LOCAL and switch on the power by turnin...

Page 26: ...he service thermostat CHECKING THE REFRIGERANT LEVEL After a few hours of operation check whether the liquid level indicator has a green crown a yellow colour indicates the presence of humidity in the...

Page 27: ...r oil of the type and viscosity indicated on the compressor rating plate For no reason should oil of a different type be introduced into the oil circuit The difference between the Dew Point and Bubble...

Page 28: ...5 45 Below 25 C the condensation pressure control is required Evaporator inlet heating mode 25 45 Without antifreeze products Condenser inlet heating mode 12 25 in heat pump operation heat exchangers...

Page 29: ...Maximum operating T indoor environment 50 C Minimum operating T 10 C Maximum operating P Low pressure side 22 6 bar r Supply voltage 10 of rating plate voltage Maximum stocking T 50 C Minimum stockin...

Page 30: ...arameters and control system settings configurable by means of the microprocessor control are password protected if they have a potential impact on the integrity of the unit TABLE II SETTING OF CONTRO...

Page 31: ...pressors operation as a function of the reading of the inlet water temperature of the chilling unit return from the system For further details refer to the microprocessor control section in the manual...

Page 32: ...MUST ALWAYS BE PERFORMED BY QUALIFIED PERSONNEL Before carrying out any work on the unit or accessing internal parts make sure you have disconnected it from the mains electricity supply The upper part...

Page 33: ...ed to fall below the freezing point of the fluid used Every 6 months Check whether the water in the circuit needs to be replenished Every 6 months Check the efficiency of the flow switch or differenti...

Page 34: ...150 Pa of absolute pressure with a capacity of approximately 10 m3 h If such a pump is available one evacuation will normally suffice to achieve an absolute pressure of 150 Pa If there is no such vac...

Page 35: ...ee 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 or other refrigerants without the wri...

Page 36: ...e been triggered Check whether any alarms are signalled on the microprocessor control panel eliminate the causes and restart the unit The phase sequence is wrong Invert two phases in the primary power...

Page 37: ...opens and adjust it if necessary If it does not respond replace it Filter clogged Pressure drops upstream and downstream from the filter should not exceed 2 C If they do replace the filter Low condens...

Page 38: ...9282 10295 11810 14015 15441 17715 20841 Pressure drop evaporator side kPa 48 4 48 4 48 4 47 1 41 7 32 3 39 0 Condenser water flow rate 1 l h 3588 5 4049 2 4587 5 5430 1 6098 5 6984 4 8236 2 Pressure...

Page 39: ...0708 43670 47046 50931 Pressure drop evaporator side kPa 41 7 43 1 53 8 37 7 35 0 36 3 40 4 40 4 Condenser water flow rate 1 l h 9331 8 10251 6 11803 7 14313 4 16128 3 17359 8 18633 9 20174 9 Pressure...

Page 40: ...drop evaporator side kPa 48 4 48 4 48 4 47 1 41 7 32 3 39 Condenser water flow rate 1 l h 5307 1 5855 3 6608 2 7988 5 8953 0 10263 7 20101 Pressure drop condenser side kPa 45 56 25 29 25 40 5 51 75 49...

Page 41: ...side kPa 41 7 43 1 53 8 37 7 35 36 3 40 4 40 4 Condenser water flow rate 1 l h 13810 15183 17492 21193 23907 25722 27617 29886 Pressure drop condenser side kPa 41 6 50 4 61 5 32 9 37 4 46 1 54 9 54 9...

Page 42: ...2 2 Oil charge compressor dm3 3 3 3 3 4 1 4 1 6 5 8 8 Evaporator type BPHE BPHE BPHE BPHE BPHE BPHE BPHE Number of evaporators 2 2 2 2 2 1 1 Water content dm3 5 5 6 1 6 6 7 1 7 9 32 33 5 Type of refri...

Page 43: ...8 Evaporator type BPHE BPHE BPHE BPHE BPHE BPHE BPHE BPHE Number of evaporators 1 1 1 1 1 1 1 1 Water content dm3 34 1 36 2 38 1 67 8 70 6 73 5 73 5 73 5 Type of refrigerating circuit connections RTK...

Page 44: ...40010 Bentivoglio BO Via Romagnoli 12 a Tel 051 8908111 Fax 051 8908122 www galletti it...

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