Daikin EWYD-4Z B, Installation, Operation And Maintenance Manual

Page 1: ...ns REV 04 Date December 2019 Supersedes D EIMHP01201 18_03EN Multipurpose unit with Inverter Driven Single Screw Compressor EWYD 4ZB Refrigerant R 134a Installation Operation and Maintenance Manual D...

Page 2: ...connections 18 3 10 1 Cable requirements 18 3 10 2 Interconnection cables 18 3 10 3 Phase unbalance 19 4 OPERATION 19 Operator s responsibilities 19 5 MAINTENANCE 19 5 1 Routine maintenance 19 5 2 Uni...

Page 3: ...D EIMHP01201 18_04EN 3 24 Fig 1 Typical refrigerant circuit Water inlet and outlet are indicative Please refer to the machine dimensional diagrams for exact water connections...

Page 4: ...HEAT EXCHANGER COLD WATER 9 SHELL TUBE HEAT EXCHANGER HOT WATER 10 PRESSURE RELIEF VALVE Psat 24 5 bar CHANGEOVER DEVICE OPTIONAL 11 PRESSURE RELIEF VALVE Psat 15 5 bar CHANGEOVER DEVICE OPTIONAL 12...

Page 5: ...e electrical panel Single circuit unit Double circuits unit Label Identification 1 Manufacturer s logo 5 Cable tightening warning 2 Gas type 6 Non flammable gas symbol 3 Hazardous Voltage warning 7 Un...

Page 6: ...cuits close the section of the piping concerned and drain the fluid gradually to stabilise the pressure at the atmospheric level 12 do not use your hands to check possible refrigerant leaks 13 disable...

Page 7: ...our pressure from evaporation pressure to condensation pressure Evaporator where the low pressure liquid refrigerant evaporates to cool the water Condenser where the high pressure vapour refrigerant c...

Page 8: ...ntact factory for further details For operation with temperature at the outlet of the cold heat exchanger below 4 C the unit must operate with glycol mixture ethylene or propylene glycol The glycol pe...

Page 9: ...be able to operate outside the above envelope with compressors unloading Please contact factory for further details For operation with temperature at the outlet of the cold heat exchanger below 4 C th...

Page 10: ...ts around the unit 1 1 Noise The unit is a source of noise mainly due to rotation of compressors and fans The noise level for each model size is listed in sales documentation If the unit is correctly...

Page 11: ...ith 4 lifting points The drawing shows only the 6 fans version For the 4 fans version the lifting mode is the same Unit with 6 lifting points The drawing shows only the 12 fans version The lifting mod...

Page 12: ...D EIMHP01201 18_04EN 12 24 Unit with 8 lifting points...

Page 13: ...he condenser Limited installation space could reduce the normal air flow thus significantly reducing the machine s performance and considerably increasing consumption of electrical energy When decidin...

Page 14: ...mmended For further solutions please consult Daikin technicians The minimum distances reported above ensure functionality of the unit in most applications However there are specific situations which i...

Page 15: ...is working quite normally Fig 6 Multiple Chiller Installation In order to avoid the hot air recirculation due to dominant winds the installation where all units are aligned to the dominant wind is pre...

Page 16: ...as possible to the unit as in Fig 7 If the water filter is installed in another part of the water system the Installer has to guarantee the cleaning of the water pipes between the water filter and th...

Page 17: ...when the evaporator and or condenser water flow is lower than 50 of nominal flow rate For a proper unit operation the water flow rate of both heat exchangers evaporator and condenser must always recir...

Page 18: ...er harmonics such as an inverter or phase cut ground losses can increase to much higher values about 2 A The protections for the power supply system must be designed according to the values mentioned...

Page 19: ...g data for every installed unit Another record should also be kept of all the periodical maintenance and servicing activities If the operator notes abnormal or unusual operating conditions he is advis...

Page 20: ...nt leakage X Verify refrigerant flow using the liquid sight glass Sight glass full X Verify filter dryer pressure drop X Verify oil filter pressure drop Note 5 X Analyse compressor vibrations X Analys...

Page 21: ...it is necessary to wash periodically the frame surfaces with water and suitable detergents In case of part of unit frame paint came off it is important to stop its progressive deterioration by repain...

Page 22: ...nd its operating limits or not performing proper maintenance according to this manual can void the warranty Observe the following points in particular in order to conform to warranty limits 1 The unit...

Page 23: ...label supplied with the product as following instructions Any refrigerant charge for each circuit 1 2 3 added during commissioning the total refrigerant charge 1 2 3 calculate the greenhouse gas emis...

Page 24: ...nt and the products and services presented therein Specification are subject to change without prior notice Refer to the data communicated at the time of the order Daikin Applied Europe S p A explicit...