Daikin EWYD-BZ Series Installation, Maintenance & Operation Manual Download

Page: 38 / 64

Figure 21 - Refrigeration cycle with partial heat recovery

Valvola ritegno

Check valve

Attacco 1/4" SAE

1/4" SAE connection

Valvola di sicurezza

Safety valve

Valvola di espansione

Expansion valve

Pressostato alta pressione

High-pressure switch

Spia passaggio liquido

Liquid flow sight glass

Pressostato bassa pressione

Low-pressure switch

Trasduttore alta pressione

High pressure transducer

Rubinetto linea liquido

Liquid line valve

Rubinetto di aspirazione (optional)

Suction valve (optional)

Rubinetto di mandata

Delivery valve

Rubinetto di carica 1/4" SAE

1/4" SAE charge valve

Direzione fluido in refrigerazione

Direction of fluid for cooling

Direzione fluido in riscaldamento

Direction of fluid for heating

(*) Water inlet and outlet data are given for indication only. Refer to the dimensional diagram of the machine for the exact

water connection of the partial recovery exchangers.

Figure shows two circuits unit. For thre circuit units the third circuit is identical to the first two and the evaporator has one

gas line and one liquid line more.

D-EIMHP00508-16EN - 38/64

Summary of Contents for EWYD-BZ Series

Page 1: ...Installation maintenance operation manual EWYD BZ Inverter air to water heat pumps EWYD 250 580BZSS EWYD 250 570BZSL 50Hz Refrigerant R 134a D EIMHP00508 16EN REV 00 Date Supersedes...

Page 2: ...l The entire content is protected by Daikin copyright WARNING Before starting the installation of the unit please read this manual carefully Starting up the unit is absolutely forbidden if all instruc...

Page 3: ...VFD and related problems 31 The operating principle of the VFD 32 The problem with harmonics 32 Operation 35 Operator s responsibilities 35 Description of the machine 35 Description of the refrigerat...

Page 4: ...eat recovery exchangers 21 Figure 8 Adjusting the safety flow switch 23 Figure 9 Single and twin pump hydronic kit 23 Figure 10 Low lift water pumps kit option on request Lift diagrams 24 Figure 11 Hi...

Page 5: ...rting document for qualified and trained personnel but it is not intended to replace such personnel All activities must be carried out in compliance with local laws and regulations Receiving the machi...

Page 6: ...y Refrigerant D R 134a P R 407c Q R 410a Capacity class in kW Cooling Always 3 digit code Idem as previous Model series Letter A B major modification Inverter Non inverter Z Inverter Efficiency level...

Page 7: ...Heating Capacity 1 2 Stepless Minimum capacity Cooling EER 1 Heating Unit power input 1 2 ESEER IPLV Casing Colour Ivory White Material Galvanized and painted steel sheet Dimensions Unit Weight Unit O...

Page 8: ...eating and COP are based on the following conditions condenser 40 45 C ambient 7 C DB unit at full load operation Cooling capacity unit power input in cooling and EER are based on the following condit...

Page 9: ...evaporator 12 7 C ambient 35 C unit at full load operation The values are according to ISO 3744 and are referred to evaporator 12 7 C ambient 35 C full load operation High discharge pressure pressure...

Page 10: ...Voltage Maximum running current Nominal running current in cooling Maximum current for wires sizing Maximum starting current Maximum current for wires sizing Nominal running current in cooling Nominal...

Page 11: ...filter pressure drop Compressor Refrigerant circuit Sound Power Sound Pressure 3 Refrigerant type Refrigerant charge N of circuits EWYD BZSL Cooling Capacity control Type Heating Capacity 1 2 Stepless...

Page 12: ...BZSL Capacity control Stepless Minimum capacity Cooling Type EER 1 ESEER COP 2 IPLV Casing Colour Ivory White Material Galvanized and painted steel sheet Dimensions Unit Weight Unit Operating Weight...

Page 13: ...pressor Heating Nominal water flow rate Nominal Water pressure drop High efficiency fin and tube type with integral subcooler Direct propeller type DOL Ivory White Galvanized and painted steel sheet S...

Page 14: ...ximum running current Starting method VFD EWYD BZSL Power Supply Phase Frequency Voltage Voltage Tolerance Unit Maximum starting current Nominal running current cooling Nominal running current heating...

Page 15: ...um temperature may cause opening of the safety valves on the compressors suction line ATTENTION Storing in condensing atmosphere may damage the electronic components Operation Operation is allowed wit...

Page 16: ...Figure 1 Operating limits in cooling mode EWYD BZSS EWYD BZSL Figure 2 Operating limits in heating mode EWYD BZSS EWYD BZSL D EIMHP00508 16EN 16 64...

Page 17: ...water pipes while the machine is connected to the system A mechanical filter must be installed on the water pipe connected to the heat exchanger inlet The machine is supplied with safety valves that a...

Page 18: ...be installed on a robust and perfectly plan foundation should the machine be installed on balconies or roofs it might be necessary to use weight distribution beams For installation on the ground a st...

Page 19: ...llation maintenance operations Figure 4 shows the minimum space required Vertical air discharge must not be obstructed as this would significantly reduce capacity and efficiency If the machine is surr...

Page 20: ...m during service 3 Manual or automatic air venting device at the system s highest point drain device at the system s lowest point Neither the evaporator nor the heat recovery device must be positioned...

Page 21: ...er system as anti freeze protection pay attention to the fact that suction pressure will be lower the machine s performance will be lower and water pressure drops will be greater All machine protectio...

Page 22: ...on methods should be considered when designing the system as a whole 12 Continuous water flow circulation inside piping and exchangers 13 Addition of an appropriate amount of glycol inside the water c...

Page 23: ...e kit could be configured as in the following figure Single pump hydronic kit Twin pump hydronic kit 1 2 3 5 1 4 1 2 3 5 1 4 1 Victaulic joint 2 Water safety valve 3 Connecting manifold 4 Anti freeze...

Page 24: ...0 250 370 360 H 460 450 B 270 270 E 380 370 I 510 490 C 290 290 F 410 400 520 510 D 320 320 G 440 430 J 580 570 340 330 370 360 EWYD BZSS EWYD BZSL with low lift twin pump Label EWYD BZSS EWYD BZSL La...

Page 25: ...A 250 250 E 370 360 I 510 490 B 270 270 F 380 370 520 510 C 290 290 410 400 J 580 570 D 320 320 G 440 430 340 330 H 460 450 EWYD BZSS EWYD BZSL with high lift twin pump Label EWYD BZSS EWYD BZSL Label...

Page 26: ...he machine is installed in closed or partly covered areas possible damage from inhalation of refrigerant gases must be avoided Avoid releasing the refrigerant into the atmosphere The safety valves mus...

Page 27: ...ure drop EWYD BZSS EWYD BZSL Circ 1 Circ 2 Circ 3 250 250 A A 270 270 A A 290 290 A A 320 320 A B 340 330 B B 370 360 B B 380 370 B B 410 400 B C 440 430 C C 460 450 A A A 510 490 B B A 520 510 B B B...

Page 28: ...g diagram that is shipped with the machine The installer must supply the following components Power supply cables dedicated conduit Interconnection and interface cables dedicated conduit Thermal magne...

Page 29: ...4 290 4 0 5 5 7 7 10 4 320 4 0 5 5 7 7 10 4 330 5 5 7 5 10 4 13 9 360 5 5 7 5 10 4 13 9 370 5 5 7 5 10 4 13 9 400 5 5 7 5 10 4 13 9 430 5 5 7 5 10 4 13 9 450 5 5 7 5 10 4 13 9 490 7 5 11 0 13 9 20 2...

Page 30: ...mA correspond to 0 C differential 20mA correspond to the setpoint plus the maximum differential The signal cable must be directly connected to terminals 35 and 36 of the M3 terminal board The signal c...

Page 31: ...er to vary the compressor rotation speed and consequently the refrigerant charge generated maintaining the efficiency of the compressor itself at extremely high levels compared to other methods of cap...

Page 32: ...two involves charging the capacitors direct current bus also known as a DC Link step three involves the reconstruction of the alternating current a genuine inverter by means of a transistor bridge no...

Page 33: ...account both phase displacement as well as harmonic content expressed as a ratio of the fundamental component I1 to the current and the overall effective value It actually expresses which part of the...

Page 34: ...f other utilities are connected at the connection point PCC the greater the weight of these utilities the smaller the current distortion will be Fig 16 illustrates the total harmonic distortion in the...

Page 35: ...orator is drawn by the compressor through the electric motor which gets cooled by the refrigerant It is subsequently compressed and during this process the refrigerant mixes with the oil from the oil...

Page 36: ...one High pressure transducer Rubinetto linea liquido Liquid line valve Rubinetto di aspirazione optional Suction valve optional Rubinetto di mandata Delivery valve Rubinetto di carica 1 4 SAE 1 4 SAE...

Page 37: ...nger and is once again taken into the compressor to repeat the cycle Controlling the heat recovery circuit and installation recommendations The partial heat recovery system is available in both chille...

Page 38: ...ubinetto di aspirazione optional Suction valve optional Rubinetto di mandata Delivery valve Rubinetto di carica 1 4 SAE 1 4 SAE charge valve Direzione fluido in refrigerazione Direction of fluid for c...

Page 39: ...screw Compression sealing is done thanks to a suitably shaped special composite material that is interposed between the main screw and the satellite The main shaft on which the main rotor is splined...

Page 40: ...led by the main rotor 2 Once the flute volume is closed off from the suction chamber the suction stage of the compression cycle is complete A Suction gas 3 Compression As the main rotor turns the volu...

Page 41: ...ove the slide The oil flow is controlled by two different solenoid valves A and B according to inputs from the unit controller The solenoids are normally closed NC and they open when powered During th...

Page 42: ...s vented from the capacity control cylinder The force of the spring supplemented by discharge pressure acting on the unload side of the piston moves the slide valve towards the minimum load position E...

Page 43: ...ON Do not start up the compressors if the delivery liquid liquid injection or suction valves are closed Failure to open these valves may cause serious damage to the compressor Put all the fan circuit...

Page 44: ...he evaporator design pressure drop is reached Adjust the flow switch not included at this point to ensure that the machine operates within a 20 flow range Twin pump The system foresees the use of a tw...

Page 45: ...that the heaters are powered at least 24 hours before the planned start up time To ensure that they are activated it is sufficient to keep the machine on by closing the general disconnecting switch Q1...

Page 46: ...order to reduce the outlet water temperature The correct functioning can be verified by checking the supply frequency and the current supplied by the VFD 14 Check refrigerant evaporation and condensat...

Page 47: ...sign on every switch that has been opened advising to open all the valves before starting the compressors 6 If no water and glycol mixture has been introduced into the system discharge all the water...

Page 48: ...le a form for collecting operational data can be found at the end of this manual Weekly recording of all the machine s operating parameters is recommended Collecting this data will be very useful to t...

Page 49: ...nalysis of water 6 X Electrical Verification of control sequence X Verify contactor wear Replace if necessary X Verify that all electrical terminals are tight Tighten if necessary X Clean inside the e...

Page 50: ...ing this procedure would cause the evaporator to freeze with consequent breakage of internal piping 1 Shut down the relevant compressor by turning the Q1 or Q2 switch to Off 2 Wait until the compresso...

Page 51: ...essor is 13 litres Procedure to replace oil filter 1 Shut down both compressors by turning the Q1 and Q2 switches to the Off position 2 Turn the Q0 switch to Off wait for the circulation pump to turn...

Page 52: ...r flow through the exchanger for the entire charge discharge time Interrupting the water flow during this procedure would evaporator to freeze with consequent breakage of its internal piping Damage ca...

Page 53: ...in the vicinity of a leak However this is not necessarily always a good search criterion Searching with soap and water can be a good method for medium to large leaks while an electronic leak detector...

Page 54: ...ssor and allows to monitor the discharge pressure and to control the fans Should the condensation pressure increase the microprocessor will control the compressor load in order to allow it to function...

Page 55: ...oration pressure Condensation pressure Oil pressure Refrigerant temperature Evaporation saturated temperature Suction gas pressure Suction superheating Condensation saturated temperature Discharge sup...

Page 56: ...ropriate manner beyond 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 warran...

Page 57: ...e included in category III of the classification established by the European Directive PED 2014 68 EU For chillers belonging to this category some local regulations require a periodic inspection by an...

Page 58: ...he atmosphere Refrigerant type R134a GWP 1 value 1430 1 GWP Global Warming Potential The refrigerant quantity is indicated on the unit name plate Periodical inspections for refrigerant leaks may be re...

Page 59: ...eld h Greenhouse gas emission of the total refrigerant charge expressed as tonnes of CO2 equivalent m Refrigerant type n GWP Global Warming Potential p Unit serial number 2 The filled out label must b...

Page 60: ...metal and plastic parts All these parts must be disposed of in accordance with the local regulations in terms of disposal Lead batteries must be collected and taken to specific refuse collection cent...

Page 61: ...D EIMHP00508 16EN 61 64...

Page 62: ...D EIMHP00508 16EN 62 64...

Page 63: ...D EIMHP00508 16EN 63 64...

Page 64: ...cy reliability or fitness for particular purpose of its content and the products and services presented therein Specifications are subject to change without prior notice Daikin Europe N V explicitly r...

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