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1. 23W Thermostat differential changeover switch ssi lt lt CORRECT gt 37 Operation and Installation 7 Periodic Checks for Safety Devices Periodically check safety devices and keep a record of checks in accordance with regulations on handling high pressure gases Coniact the place of purchase if a safety device fails to trip at its prescribed value Values of safety devices are listed in the manufacturer s equipment specifications 1 Pressure switch High pressure protection 1 Shut off condenser water supply 2 While watching the pressure gauge check the pressure switch high pressure protection trips at the prescribed pressure 3 Reset the unit Note the pressure switch high pressure protection must be reset by hand see page 48 4 Start condenser water flow as before 2 Safety valve CUW6OASY C7 UWJ3350B5Y CUW120A5Y CUW240A5Y Remove the safety valve from the unit and test it 3 Pressure gauge and compound gauge Compare gauges against a cirtified gauge Replace the gauges if the sale is off by more than half the smallest reading 38 lt lt CORRECT gt Operation and Installation e Never touch parts which tend to become hot such as compressors and refrigerant piping Doing so could result in skin burning S Prohibited Do not attempt to run the compressor by pushing the magnetic contactor with your finger Doing so could
2. 30 lt WRONG gt Operation and Installation Do not install the cooling tower near to exhaust outlets such as smokestacks Smoke and corrosive gases drawn into the cooling tower will contaminate water inside and may eventually lead to corrosion inside the water chiller 2 Maintenance and checks Condenser water circulation water is affected by concentration of dissolved oxygen caused by constant evaporation of water in the cooling tower Force blow water lines repeatedly drain and refill the system to prevent water quality deterioration When the cooling tower runs for long periods of time water quality deteriorates leading possibly to scale deposits or corrosion inside the condenser For details contact your DAIKIN dealer lf the cooling tower is not equipped for forced blow periodically change water inside 3 Condenser cleaning Clean the condenser about once every season When the cooling tower runs for long periods of time scale and fungus may form inside This lowers cooling capacity which may cause one of the safety devices to trip from time to time and possibly prevent you from using the unit as you would normally ln areas where water quality cannot be ensured clean the condenser more frequently For help on cleaning cycles and how to clean the equipment contact the place of purchase 4 Concerning red water chilled water and condenser water lron is used for piping and h
3. DISCHARGE R pressure gauge STOP RESET button OPERATION button SUCTION R pressure gauge 22 lt WRONG gt 4 Operation and Installation 1 Names of Parts C7 UWJ1320B5Y C7 UWJ1700B5Y CUW60A5Y Manufacturers label Switch box Power supply terminal strip Chilled water outlet Drain outlet Condenser Drain outlet Gooler Rear of main unit 24 lt WRONG gt Operation and Installation C7 UWJ2650B5Y C7 UWJ3350B5Y CUW120A5Y Manufacturers label Compressor Power source intake Condenser Condenser water outlet Condenser water inlet Condenser water outlet Condenser water inlet Chilled water outlet Drain outlet Condenser Rear of main unit lt WRONG gt 25 4 Operation and Installation 2 Control Panel Names of Part and Functions The unit is operated by push buttons on the switch box C7 UWJ1320 1700B5Y CUW60A5Y DISCHARGE pressure gauge ALARM lamp OPERATION lamp SUCTION pressure gauge J z RRR BRAT ALARM OPERATION eeake e MASTER CONTROL Hib U ty b ak STOP RESET OPERATION stopmeser button OPERATION button Pressure relay High pressure side MOPERATION button ipeieccise catia ren icieniniercestnieartaqndunnthe Push to start operation See page 34 STOP RESET button
4. Power Source Intake shut Valve on the Condenser Outlet ane 42 lt lt CORRECT Operation and Installation 10 Precautions for Prolonged Idle Period Warning e Do not allow water to remain in the water piping during prolonged idle periods For prolonged idle periods you should fill the water pipes with antifreeze or drain all the water from the pipes Failure to do so could result in freezing of water Be sure to turn off the power supply switch If you forget to turn off the power supply switch electricity is still supplied to the crank case heater consuming several hundred watts of power In order to conserve electricity be sure to turn off the power supply switch Fully close primary side valves on the chilled water and condenser water circuits n cold areas where freezing is always a winter possibility drain the condenser and evaporator water completely before the cold season Condenser drain plug Rear Atfter a prolonged idle time you should turn the power supply switch on at least six hours before running the chiller again This is done in order to provide electricity to the crank case heater Condenser drain plug Front Drain plug dimensions Condenser Condenser Models Evaporator Front Rear C7 UWJ1320B5Y C7 UWJ1700B5Y PT3 4 PT1 4 PT1 2 CUWE6O0ASY C7 UWJ2650B5Y C7 3350B5Y CUW120A5Y PT1 PT1 4 PT1 2 lt CORR
5. ef 3 TSH NG RO Q Condenser water outlet Condenser water inlet Condenser water outlet i Condenser water I inlet Power supply terminal strip Internal switch box Chilled water outlet Chilled water inlet Drain outlet Condenser Rear of main unit lt CORRECT gt gt Operation and Installation 2 Control Panel Names of Part and Functions The unit is operated by push buttons on the switch box C7 UWJ1320 1700B5Y CUW60A5Y DISCHARGE pressure gauge ALARM lamp OPERATION lamp sehen OPERATION MASTER CONTROL STOP RESET OPERATION stor eset button OPERATION button Pressure switch High pressure side OPERATION button sc cccccsessssscsccscenenscessascsseancsenecvnces Push to start operation See page 34 STOP RESET butt cece cece cceecesseeeseeneeeneees Push to stop the unit or reset the unit See page 34 when trouble occurs OPERATION lamp ccecccecccseeeseeeseeesseeesteesteeeseees Lights while the unit is running ALARM lamp cecccceeeceecsseeeesseeeeeeseeesesseeeeeenees Lights when a safety device is tripped See page 47 while the chiller is running lt lt CORRECT 26 Operation and Installation The unit is operated by push buttons on the switch box C7 UWJ2650 3350B5Y CUW120A5Y DISCHARGE L pressure gauge SUCTION L pressure gauge
6. Pressure switch High pressure protection 48 lt lt CORRECT gt 13 Working Range Operation and Installation H Working Range The chiller should be used only within the range indicated by slanted lines D oa Condenser Hot water outlet 40 temperature w ol e Oo we ol ye Oo Loa Operable range in Pull down operation Recommended operating range Continuous stable operation SEAWAY ACATANA ATAU AAA ANAS 5 10 15 Chilled water outlet temperature 20 25 C NOTE Make sure the chiller is within the recommended operating range within one hour after starting operation Make sure operation conforms to the following restrictions Item Contents Power supply voltage Within 10 of rated voltage Phase unbalance Within 2 of rated voltage Power supply frequency Within 2 of rated Chilled and condenser water temperature limits Working range given above Pull down duration Within one hour at no load Cooling capacity and input According to JISB8613 Start stop interval of compressor Max 6 operating and stopping times within one hour Chilled and condenser water quality JRA GL 02 water quality standard for chilled water system See following page No soluble matters deteriorating copper and stainless steel shall be included Chilled and condenser water velocity 0 6 1 5
7. 415V etc in accordance with the wiring diagram 28 lt lt CORRECT Operation and Installation i Water piping work Be sure to install a strainer on the water inlet side and provide a dirt pocket in a suitable A CAUTION place Be careful not to install the water inlet and outlet inversely If sand dirt or rust gets into the water system the metal materials will become mechanically If the inlet and outlet are connected inversely corroded the chiller will not function properly and could furthermore be damaged The strainer and dirt pocket require periodic maintenance Select a location that allows space for maintenance The chiller does not come with water pump Be sure to install a water pump that matches Water ipi i piping work Expansion tank piping resistance lnstall a flow regulating valve gate valve on the outlet inlet water piping Water Drain pipe Jnstall a thermometer on the water inlets and supply valve outlets This helps you know the operating condition of the chiller Sluice valve The connection diameter is the same Strainer as piping Use an item of same or larger Chilled Water pump diameter water inlet Unit Be sure to cold insulate chilled water piping with anti sweating tubing Chilled water outlet Thermometer wWater quality standards for chilled water Gate valve specify circulating water as a premise See water quality standa
8. C 7 Chilled Hot water temperature at outlet Check the thermometer 5 10 C When cooling 40 45 C When heating 8 Vibration and noises Listen for noises and feel for vibrations No abnormal vibrations or noises 9 Ambient temperature Check the thermometer Max 30 C C Seasonally 1 Refrigerant charge Check the condenser liquid level gauge Refrigerant is within range on the gauge Level gauge 2 Refrigerant oil charge Check the compres sor oil gauge Refrigerant oil is within range on the gauge Oil gauge 3 Water quality According to JIS K0101 or this manual lt lt CORRECT See water quality standards on page 50 41 9 Operation and Installation Pump Down 1 Method of Pump Down 1 Start the unit 1 2 Close the stop valve on the condenser outlet 3 If the pressure switch Low pressure protection trips shut compressor discharge stop valve 4 Stop the unit Note 1 Do not short circuit the pressure switch Low pressure protection or the temperature switch discharge gas for any reason whatsoever 2 Operate the compressor for about 15 minutes before performing pump down C7 UWJ1320B5Y C7 UWJ1700B5Y Shutoff Valve on the CUW60A5Y Compressor Discharge Side Compressor C7 UWJ2650B5Y C7 UWJ3350B5Y CUW120A5Y Shutoff Valve on the Compressor Discharge Side
9. The first figure is indicated for a cooling tower at 30 C Whereas the figure in parentheses is indicated for a well at 18 C 44 lt WRONG gt 12 Operation and Installation What to do When Not Functioning Properly The following cases are not malfunctions The chiller is stopped during winter or nights when the outdoor temperature falls to a round 0 C and only the pump runs chiller is receiving electricity When stopped The compressor inside the chiller is hot if touched chiller is receiving electricity The chiller is equipped with a pump for preventing water inside the piping from freezing that force operates For details see the wiring diagram Electricity is supplied to the crank case heater to warm the compressor so that the chiller can be started smoothly This is not a malfunction Before requesting after sales service please check the following items State of trouble Operation Cause Disposal lamp Water pump Was there a power failure To be safe turn the power supply switch compressor doesn t off temporarily start at all f off Is the power supply switch Turn the power supply switch on turned on Is the power supply fuse Replace the power supply fuse blown The water pump Is their a lack of make up Replenish sufficiently with make up starts but water water water Water is not pumped unless the doesn t circulate water pum
10. Thermostat Electronic thermostat for chilled water Capacity control 100 70 40 0 Insulation material Foam polyethylene Protection device See page 13 Refrig Name R22 erant Charge 16 Refriger Name SUNISO 4GSD ation oil Charge 7 5 Condenser water inlet outlet PT3 Internal thread PT4 Internal thread Chilled water inlet outlet PT3 Internal thread 4B Flange JIS10K Drain outlet PTI internal thread for coping Nalar PT1 Internal thread for chilled water PT1 4 Internal thread for cooling water Weight operating weight kg 775 830 960 1020 1025 1105 x Instruction manual Installation manual strainer for Instruction manual warranty card fuse foundation bolt vibro isolating pad Standard accessories chilled and cooling water warranty card fuse warning sign Pipe con nections In case of modified heat pump Only the specifications different from standard specifications are indicated Capacity E soHz kW 46 8 52 7 175 204 212 240 Peak E oHz min 134 151 502 586 606 690 Ghilled water 60 Hz g min 60 66 226 256 271 302 Hot water thermostat Electronic thermostat for chilled water Notes 3x1 The values shown are based on leaving chilled water outlet temperature of 7 C inlet outlet temperature difference of 5 C and condenser water inlet temperature of 30 C D B amp 2 The values shown are based on leaving hot water outlet
11. e Select an air conditioner that satisfies both the cooling and heating capacities For many houses air conditioners are used for cooling or heating individual rooms not for all the rooms Therefore when selecting an air conditioner assume that surrounding rooms are not air conditioned Determining piping size e Circulation water Determine the circulation water flow rate based on the air conditioner When the flow flow rate rate exceeds the limit flow rate specified for the chiller consider providing a snubber tank e Loss resistance Select a pipe size so that its loss resistance for 1m is within 30 to 100 mmH2O and the passage water speed must be less than 3m for larger size Selection of circulation water pump 54 lt WRONG gt 2 Specifications 1 Standard Specifications Water chilling unit Water cooled type C7 UWJ1320B5Y C7 UWJ1700B5Y CUW60A5Y Capacity Hz 118 132 150 170 180 200 Chilled water 50 flow rate Meg 338 378 430 487 516 573 Pressure drop 5 Hz 421 478 532 615 641 725 Power source 3 phase 380 400 415V 400 440 VAC 50 60Hz Control power source Single phase 200 VAC 50 60Hz Type Water chilling unit Water cooled type Exterior Ivory white 5Y7 5 1 External dimensions 1360x2325x650 1390x2430x725 1425x2460x725 Model ZH38LSFYE 50Hz ZH3LSFYB
12. flow rate E oHz 2 min 356 401 452 509 535 605 1055 1210 Hot water thermostat Notes Electronic thermostat for chilled water 3x1 The values shown are based on leaving chilled water outlet temperature of 7 C inlet outlet temperature difference of 5 C and condenser water inlet temperature of 30 C D B amp 2 The values shown are based on leaving hot water outlet temperature of 45 C inlet outlet temperature difference of 5 C and chilled water inlet temperature of 15 5 C D B lt WRONG gt 2 Troubleshooting Guide ALARM Lamp When one of the unit s safety devices trips the OPERATION lamp goes out and the ALARM lamp lights up In such case locate and eliminate the cause of the trouble see page 45 and push the STOP RESET button Only then will the ALARM lamp go out and can the unit be restarted Note if the pressure switch high pressure protection trips follow the instructions on page 48 to reset the unit DISCHARGE C7 UWJ1320 1700B5Y SUCTION CUW60A5Y OPERATION lamp BERTH ALARM OPERATION mp fF MASTER CONTROL FE Jty h Et STOP RESET OPERATION STOP RESET button OPERATION button ene eG Pressure relay High pressure side DISCHARGE L pressure gauge C7 UWJ2650 3350B5Y CUW120A5Y MASTER CONTROL See E I tY h St
13. 4 Temperature switch Compressor motor protection 1 Same as for high pressure switch high pressure protection 5 Pressure switch Low pressure protection 1 Expansion valve remains closed because of damage 2 Condenser outlet stop valve is closed 3 Chilled water level is extremely low 6 Reverse phase protection relay 1 The power supply is connected by reverse phase 7 Over current relay Compressor motor 1 Same as for pressure switch high pressure protection lt lt CORRECT 47 4 Operation and Installation Hi What to do when the pressure switch high pressure protection trips The pressure switch high pressure protection has to be reset manually If either of these safety devices trips the chiller will not restart when the STOP RESET button is pressed The moment that the operation button is pressed the ALARM lamp will light up You must push the reset button and then push the STOP RESET button before restarting lf you investigate but cannot determine the cause contact your DAIKIN dealer immediately 1 When the pressure switch Reset button high pressure protection trips Red Some of the possible causes include low condenser water level high condenser water temperature and contamination in the condenser Investigate the cause and take the necessary remedial action before restarting the chiller For installation location of pressure switches see page 24 25
14. 4B Flange JIS10kK 5B Flange JIS10k Inlet 6B flange connect to h 159 tube Outlet 5B flange connect to 140 tube Pipe con Drain outlet PT1 Internal thread for chilled water PT11 Internal thread for cooling water Weight operating weight kg 1395 1500 1790 1925 1930 2085 4880 5380 Standard accessories Instruction manual warranty sign card fuse foundation bolt vi bration isolating pad warning Operation manual fuse war ranty mating flange In case of modified heat pump Only the specifications different from standard specifications a re indicated Capacity soHz kW 277 319 350 403 422 485 838 985 Hot water 50 flow rate e042 2 min 795 914 1004 1156 1197 1380 2405 2755 Chilled water flow rate 6 _9Hz min 356 401 452 509 535 605 1055 1210 Hot water thermostat Notes Electronic thermostat for chilled water 31 The values shown are based on leaving chilled water outlet temperature of 7 C inlet outlet temperature difference of 5 C and condenser water inlet temperature of 30 C D B 2 The values shown are based on leaving hot water outlet temperature of 45 C inlet outlet temperature difference of 5 C and chilled water inlet temperature of 15 5 C D B lt lt CORRECT 3 Troubleshooting Guide D ALARM Lamp When one of the unit s safety d
15. 60Hz ZH5MLFYE ZH5MLFYB ZH5LLFYE ZHS5LLFYB Type Hermetically sealed scroll type Semi hermetically sealed single scroll type Motor outputxNo of units 30x1 37x1 45x1 Compressor Starting system A A Start Model CXC2118 CXC2120 CF3220 C6 Type Shell and cross fine tube type Heat exchanger on water side No of units 1 Model DHG2414 DHG2418 DHD3220 C6 Type Brazed plate type Shell and HI X tube type No of units 2 g Q Q gt uw 1 Refrigerant control Thermal expansion valve Thermostat Electronic thermostat for chilled water Capacity control 100 70 40 0 Insulation material Foam polyethylene Protection device See page 13 Refrig Name R22 erant Charge 16 Refriger Name SUNISO 4GSD ation oil Charge 7 5 Condenser water inlet outlet PT3 Internal thread PT4 Internal thread Chilled water inlet outlet PT3 Internal thread 4B Flange JIS10K Pipe con nections Drain outlet PT Internal thread for chilled water PT Internal thread for cooling water PT1 Internal thread for chilled water PT1 4 Internal thread for cooling water Weight operating weight kg 775 830 960 1020 1025 1105 Standard accessories Instruction manual Installation manual strainer for chilled and cool
16. MASTER CONTROL STOP RESET OPERATION OPERATION DISCHARGE R pressure gauge STOP RESET button OPERATION button SUCTION R pressure gauge OPERATION button sic cccccscscscscsccsccsenscessescssesncsenecvnces Push to start operation See page 35 STOP RESET butt cece cece cceecesseeesseeneeeneees Push to stop the unit or reset the unit See page 35 when trouble occurs OPERATION lamp uu cceccceccecceeseeeeeeesteesseeseeeseee Lights while the unit is running ALARM lamp cecccceeeceecsseeeesseeeeeeseeesesseeeeeenees Lights when a safety device is tripped See page 47 while the chiller is running lt lt CORRECT gt 27 3 Operation and Installation Installation W Installation location Be sure to provide sufficient space for maintenance Do not install in a place with high humidity The chiller should be installed to facilitate connection of water piping and electric wiring Be sure to provide vibration isolation vibration isolation pad vibration isolation frame etc in accordance with installation conditions If vibration isolation is not provided vibration could be transmitted from where it is installed causing sound to be produced from the floor or walls in some cases Proper vibration isolation is particularly important when the chiller is to be installed indoors The unit produces drainage depending on operating state Take drainage measures such as pro
17. esses discciesdeccncataccetcacdeeuiniceeesiere Push to stop the unit or reset the unit See page 34 when trouble occurs OPERATION lamp ecceccccescececeseeeeeeesteeeseeseeesaees Lights while the unit is running ALARM lamp cesccei aed coiasscatnccisndanceancesnnsbansenianceanendss Lights when a safety device is tripped See page 47 while the chiller is running 26 lt WRONG gt Operation and Installation The unit is operated by push buttons on the switch box C7 UWJ2650 3350B5Y CUW120A5Y DISCHARGE L pressure gauge SUCTION L pressure gauge Manet MASTER CONTROL E E h GRR DISCHARGE R pressure gauge SUCTION R pressure gauge STOP RESET button OPERATION button MOPERATION DUO ii ipeieccisecotie ce icieniniorcestneattanndunatte Push to start operation See page 35 STOP RESET button escics iscciesdecsneataccctcacuddeueiiceessiere Push to stop the unit or reset the unit See page 35 when trouble occurs OPERATION lamp ou ccecccecceseeeseeeeeeesteeeseeseeeseees Lights while the unit is running ALARM lamp cesccesi aed cciasscaticcinndanceancesnnsbanssenianceanecdss Lights when a safety device is tripped See page 47 while the chiller is running lt WRONG gt 27 3 Operation and Installation Installation W Installation location Be sure to provide sufficient space for maintenance Do not install in a place with much
18. humidity The chiller should be installed to facilitate connection of water piping and electric wiring Be sure to provide vibration isolation vibration isolation pad vibration isolation frame etc in accordance with installation conditions If vibration isolation is not provided vibration could be transmitted from where it is installed causing sound to be produced from the floor or walls in some cases Proper vibration isolation is particularly important when the chiller is to be installed indoors The unit produces drainage depending on operating state Take drainage measures such as providing a drainage ditch etc as needed See pages 24 25 for the location of the drain outlet Wi Grounding Power supply C class grounding Grounding work 3 phases 380 400 3rd class grounding in 415V 400 440V 50 60HZz particular To prevent electric shocks be sure to ground the equipment Qualification are required to perform the grounding work i Electrical work The nominal output of the chiller differs from that of a conventional electric motor Be sure to select the size of the power supply cable in accordance with the specified instructions for external wiring For details consult with your DAIKIN dealer Be sure to provide a power supply with a power supply switch Be sure to connect an interlock so the compressor cannot be operated if the switch of the condenser water pump and chilled water pump is not on A spare t
19. on the fan coil unit When the unit is filled with water close the cock Note The air purge plug is on the water outlet 0Open the gate valve regulating water flow before starting the chilled water pump lt lt CORRECT gt 33 6 Operation and Installation How to Operate the Chiller C7 UWJ1320 1700B5Y CUW60A5Y OPERATION MASTER CONTROL STOP RESET OPERATION Push the OPERATION button 1 The operation lamp then lights and the chiller starts running 0 J47 uo E The compressor starts a little later Hi To stop the unit Push the STOP RESET button The chiller then stops running Do not shut off the power Stop the chilled water and condenser water pumps See Preparations on page 33 Close all valves See Preparations on page 33 NOTE Check the rotation direction of the compressor To check the rotation direction of the compressor check the discharge pressure and suction pressure of the pressure gauge when the compressor starts If the pressure is abnormal stop operation and consult with your DAIKIN dealer 34 lt lt CORRECT Operation and Installation C7 UWJ2650 3350B5Y CUW120A5Y MASTER CONTROL OPERATION STOP RESET OPERATION DISCHARGE A SUCTION Push the OPERATION button The operation lamp then lights and the chiller starts running The compressor starts a little later Pus
20. pressure switch Low pressure protection trips shut compressor discharge stop valve 4 Stop the unit Note 1 Do not short circuit the pressure switch Low pressure protection or the temperature switch discharge gas for any reason whatsoever 2 Warm up the compressor for about 15 minutes before performing pump down C7 UWJ1320B5Y C7 UWJ1700B5Y Shutoff Valve on the CUW60A5Y Compressor Discharge Side Compressor C7 UWJ2650B5Y C7 UWJ3350B5Y CUW120A5Y Shutoff Valve on the Compressor Discharge Side Power Source Intake Shutoff Valve on the Condenser Outlet 31 valves inside too 42 lt WRONG gt Operation and Installation 10 Precautions for Prolonged Idle Period A Warning Do not allow water to remain in the water piping during prolonged idle periods For prolonged idle periods you should fill the water pipes with antifreeze or drain all the water from the pipes Failure to do so could result in leaking Be sure to turn off the power supply switch If you forget to turn off the power supply switch electricity is still supplied to the crank case heater consuming several hundred watts of power In order to conserve electricity be sure to turn off the power supply switch Fully close primary side valves on the chilled water and condenser water circuits n cold areas where freezing is always a winter possibility drain the condenser and cooler
21. result in electrical shock or fire Prohibited H Before inspecting Push the STOP RESET button to stop the unit H Periodical inspection Check the water See water quality on page 50 valve being out of adjustment Check if there is air in the water piping system from time to time Clean the strainer periodically Wi Contract maintenance professional inspection For details contact your DAIKIN dealer Are any strange sounds being produced by the chiller If so check the source of the sounds and determine the cause If you don t know where the sounds are coming from or what is causing them contact your DAIKIN dealer AN Caution e Check open closed state of all valves before usage Check valves against instructions given in the operation manual and on the nameplate In particular be sure safety valves Compulsory are open while the equipment is running If valves are open or closed when they shouldn t be water may leak and in worse cases The equipment may catch fire or explode t would be a good idea to read SAFETY once more before starting inspection Be sure to let other maintenance technicians know that you are going to inspect the chiller Place an under inspection warning sign on the switch box Drain some of the water from the air purge plug If the water is dirty replace all the water in the system Dirty water reduces operating capacity and causes corrosion of wa
22. system 4 Chilled wat illed water Pass through t Tendency 2 Circulation system system system Item 1 6 Spas Circulation Make up Passing rou anon Make up A t Scale water water water water water Corrosion deposit i Max 20 C ep pH 25 C 6 5 8 2 6 0 8 0 6 8 8 0 6 8 8 0 6 8 8 0 o o Electrical mS m 25 C 4 Less than 80 Less than 30 Less than 40 Less than 40 Less than 30 o o Conductivity w S cm 25 C Less than 800 Less than 300 Less than 400 Less than 400 Less than 300 Chloride ions mgcl g Less than 200 i Less than 50 Less than 50 Less than 50 Less than 50 O E i f Sulfate ions mgSO g Less than 200 Less than 50 Less than 50 Less than 50 Less than 50 oO 3 Acid consumption pH4 8 i 2 mgCaCOs e Less than 100 Less than 50 Less than 50 Less than 50 Less than 50 O Total hardness mgCaCO Less than 200 Less than 70 Less than 70 Less than 70 Less than 70 O Calcium mgCaCO Less than 150 Less than 50 Less than 50 Less than 50 Less than 50 O hardness 3 seas mgSiO Less than 50 Less than 30 Less than 30 Less than 30 Less than 30 O Iron mgFe Less than 1 0 i Less than 0 3 Less than 1 0 Less than 1 0 Less than 0 3 O O Copper mgCu g Less than 0 3 Less than 0 1 Less than 1 0 Less than 1 0 l Less than 0 1 O E ae 2 Shall not be Shallnotbe Shallnotbe Shall notbe Shall not
23. temperature of 45 C inlet outlet temperature difference of 5 C and chilled water inlet temperature of 15 5 C D B 4 lt WRONG gt Specifications Water chilling unit Water cooled type C7 UWJ2650B5Y C7 UWJ3350B5Y CUW120A5Y CUW240A5Y Capacity Hz 236 265 300 335 355 400 760 800 Chilled water 50 flow rate 60Hz 677 760 860 960 1018 1147 2178 2294 Pressure drop Hz 841 960 1064 1214 1266 1449 2550 2910 Power source 3 phase 380 400 415V 400 440 VAC 50 60Hz 3 phase 380V 50Hz Control power source Single phase 200 VAC 50 60Hz 220VAC 50 60Hz Type Water chilling unit Water cooled type Exterior Ivory white 5Y7 5 1 External dimensions 1310x2835x900 1525x2785x995 1525x2840x980 2180x2855x1455 Model ZH3LSFYE ZH3LSFYB ZH5MLEYE ZHS5MLFYB ZH5LLFYE ZH5LLFYB ZH9OSLFCYE Type Semi hermetically sealed single scroll type Semi hermetic single screw type Motor outputxNo of units 30x2 37x2 40x2 90x2 Compressor Starting system J A start Model CXC1920 CXC2120 1 CXC2420 14 CF4520 C12 Type Shell and cross fine tube type Heat exchanger on water side No of units 2 Model DHG2724 DHG3222 DHG3224 DHD4020 C24 Type Shell and HI X tube type D
24. 50 Less than 50 Less than 50 Less than 50 Less than 50 O hardness 3 2 ee mgSiO Less than 50 Less than 30 Less than 30 Less than 30 Less than 30 O Iron mgFe Less than 1 0 Less than 0 3 Less than 1 0 Less than 1 0 Less than 0 3 O O Copper mgCu g Less than 0 3 Less than 0 1 Less than 1 0 Less than 1 0 Less than 0 1 O ae 2 Shallnotbe Shallnotbe Shallnotbe Shall notbe Shall not be g Sulfide ion mgS 2 detected detected detected detected detected 9 o f 2 Ammonium ion mgNH 2 Less than 1 0 Less than 0 1 Less than 1 0 Less than 1 0 Less than 0 1 O S H Residual o mgCl Less than 0 3 Less than 0 3 Less than 0 3 Less than 0 3 Less than 0 3 O a chlorine i Fee carbon mgCO Less than 4 0 i Less than 4 0 Less than 4 0 Less than 4 0 i Less than 4 0 Stability index 6 0 7 0 i eS 6 Notes 1 The item names their definitions and units are based on the standard JISKO101 The units and figures inside the parentheses are based on the conventional units written fore reference 2 The circle marks in the columns on the right indicate tendency for corrosion or scale to develop 3 Corrosion has a tendency to occur when water temperature is high 40 C or higher and if metals with no protective coating whatever are directly exposed to water it would be a good idea to take effective measures against corrosion su
25. CUW240A5Y Detach the safety valve from the unit and pressurize 3 Pressure gauge and compound gauge Compare gauges against a referential gauge Replace the gauges if off by more than half the smallest reading 38 lt WRONG gt Operation and Installation e Never touch parts which tend to become hot such as compressors and refrigerant piping Doing so could result in skin burning S Prohibited Do not attempt to run the compressor by pushing the magnetic contactor with your finger Doing so could result in electrical shock or fire Prohibited H Before inspecting Push the STOP RESET button to stop the unit H Periodical inspection Check the water See water quality on page 50 regulating valve being out of adjustment Check if there is air in the water piping system from time to time Clean the strainer filter periodically Wi Contract maintenance professional inspection For details contact your DAIKIN dealer Are any strange sounds being produced by the chiller If so check the source of the sounds and determine the cause If you don t know where the sounds are coming from or what is causing them contact your DAIKIN dealer AN Caution e Check open closed state of all valves before usage Check valves against instructions given in the operation manual and on the nameplate In particular be sure safety valves Compulsory are open while the equipment is ru
26. ECT gt m 11 Operation and Installation Precautions in Usage i Precautions in usage Except when not planning to use the unit for an extended period of time do not turn OFF the power for any reason whatsoever even while the unit is merely stopped This ensures power is supplied to the heater even while the compressor is stopped which makes the next start smoother H Refrigerant oil The unit uses a special type of refrigerant oil therefore do not mix in other types of oil Contact DAIKIN or the nearest service center to add or change refrigerant oil The refrigerant oil used in this unit SUNISO 4GSD i Means of reading pressure When the compressor starts up gauges will indicate pressure accordingly While cooling regulate condenser water flow rate in order that discharge gas pressure does not rise too far above the value below Discharge gas pressure when cooling 16kg cm 12kg cm Note The first figure is indicated for a cooling tower at 30 C Whereas the figure in parentheses is indicated for a well at 18 C 44 lt lt CORRECT 12 Operation and Installation What to do When Not Functioning Properly The following cases are not malfunctions The chiller is stopped during winter or nights when the outdoor temperature falls to a round 0 C and only the pump runs chiller is receiving electricity When stopped The compressor inside the chiller is hot if touch
27. June 1 2011 x Reliable technology ensures maximum customer satisfaction x M 11006 Correction of SERVICE MANUAL HDSE08 1 Water cooled chiller Please refer attached pages for correction of service manual HDSE08 1 The first half are wrong pages and the second half are correct pages 2 Specifications 1 Standard Specifications Water chilling unit Water cooled type C7 UWJ1320B5Y C7 UWJ1700B5Y CUW60A5Y Capacity 4 9Hz 118 132 150 170 180 200 Chilled water 50 Hz 338 378 430 487 516 573 Pressure drop 5 Hz 421 478 532 615 641 725 Power source 3 phase 380 400 415V 400 440 VAC 50 60Hz Control power source Single phase 200 VAC 50 60Hz Type Water chilling unit Water cooled type Exterior Ivory white 5Y7 5 1 External 1360x2325x650 4390x2430x725 1425x2460x725 dimensions Model ZH8LSFYE 50Hz ZH5MLFYE ZH5LLFYE ZH3LSFYB 60Hz ZH5MLFYB ZH5LLFYB Type Hermetically sealed scroll type Semi hermetically sealed single scroll type Motor outputxNo of units 30x1 37x1 45x1 Compressor Starting system A A start Model CXC2118 CXC2120 CF3220 C6 Type Shell and cross fine tube type Heat exchanger on water side No of units 1 Model DHG2414 DHG2418 DHD3220 C6 Type Brazed plate type Shell and HI X tube type No of units 1 Q a gt if Refrigerant control Thermal expansion valve
28. SET button before restarting lf you investigate but cannot determine the cause contact your DAIKIN dealer immediately 1 When the pressure switch Reset button high pressure protection trips Red Some of the possible causes include low condenser water level high condenser water temperature and contamination in the condenser Investigate the cause and take the necessary remedial action before restarting the chiller For installation position of pressure switches see page 24 25 Pressure relay High pressure protection 48 lt WRONG gt 13 Working Range Operation and Installation Wi Working Range The chiller should be used only within the range indicated by slanted lines VAAN AAA E amp oa Condenser Hot water outlet temperature Q ol N w ol Oo ye oO ip SEE OR A A RS f Operable range Continuous stable operation in Pull down operation Recommended operating range DAS 5 10 15 20 Chilled water outlet temperature 25 C NOTE Make sure the chiller is within the recommended operating range within one hour after starting operation Make sure operation conforms to the following restrictions Item Contents Power supply voltage Within 10 of rated voltage Phase unbalance Within 2 of rated voltage Power supply frequency Within 2 of rated Chilled and condenser water temperature limits Work
29. STOP RESET button Only then will the ALARM lamp go out and can the unit be restarted Note if the pressure switch high pressure protection trips follow the instructions on page 48 to reset the unit i Selecting thermodifferential When the chiller cannot be used within the recommended working range see page 49 because retained water level is low or for other reason set thermodifferential changeover switch SS1 to 4 C The factory setting is 2 C NOTE Do not change the setting while power is ON to prevent trouble from occurring with the equipment 23W Thermodifferential changeover switch lt WRONG gt 37 Operation and Installation 7 Periodic Checks for Safety Devices Periodically check safety devices and keep a record of checks in accordance with regulations on handling high pressure gases Coniact the place of purchase if a safety device fails to trip at its prescribed value Values of safety devices are listed in the manufacturer s equipment specifications 1 Pressure switch High pressure protection 1 Shut off condenser water supply 2 While watching the pressure gauge check the pressure switch high pressure protection trips at the prescribed pressure 3 Reset the unit Note the pressure switch high pressure protection must be reset by hand see page 48 4 Start condenser water flow as before 2 Safety valve CUW6OASY C7 UWJ3350B5Y CUW120A5Y
30. ake sure the water drain valves of the condenser and evaporator are completely closed Does the transformer connection match the power supply and is the reverse phase protector properly connected Factory set 50Hz 400V 60Hz 400 440V Has the chiller been grounded s the water pump s interlock circuit connected The power supply should be turned on six hours prior to operation to ensure that the compressor operates smoothly Js the water pump filled with water Evaporator drain valve If not open the water supply faucet and fill the water system Condenser drain valve CLOSED CLOSED with water while purging air from the system 32 lt lt CORRECT Operation and Installation 5 Preparations 1 Turn the power supply switch ON The unit comes with a crank case heater To ensure the compressor starts up smoothly leave this switch in the ON position during long periods of use or otherwise activate power at least 6 hours before starting the unit 2 Fill the system with water the system has a cooling tower make sure the gate valve regulating water flow is open before starting up the tower and the condenser water pump Also if you use well water make sure the gate valve regulating water flow is open before starting the condenser water pump 3 Set water circulating Purge the system To purge the system open the air purge plug on the water chilling unit and the air purge cock
31. ating 2 Discharge pressure difference between left and right compressors for 2 compressor circuits Check the pressure gauge Max 0 1MPa 3 Suction pressure Check the compound gauge 0 3 0 6MPa When cooling 0 3 0 6MPa When heating 4 Suction pressure difference between left and right compressors for 2 compressor circuits Check the compound gauge Max 0 05MPa 5 Power supply Check the voltmeter Within 10 of the rated voltage 6 Condenser water temperature at outlet Check the thermometer 30 40 C 7 Chilled Hot water temperature at outlet Check the thermometer 5 10 C When cooling 40 45 C When heating 8 Vibration and noises Listen for noises and feel for vibrations No abnormal vibrations or noises 9 Ambient temperature Check the thermometer Max 30 C C Seasonally 1 Refrigerant charge Check the condenser fluid gauge Refrigerant is within range on the gauge Level gauge 2 Machine oil charge Check the compres sor oil gauge Machine oil is within range on the gauge Oil gauge 3 Water quality According to JIS K0101 or this manual lt WRONG gt See water quality standards on page 50 41 9 Operation and Installation Pump Down 1 Method of Pump Down 1 Start the unit 1 2 Close the stop valve on the condenser outlet 3 If the
32. be g Sulfide ion mgS 2 detected detected detected detected detected 3 f 2 Ammonium ion mgNH 2 Less than 1 0 Less than 0 1 Less than 1 0 Less than 1 0 Less than 0 1 O S i Residual i o mgCl g Less than 0 3 Less than 0 3 Less than 0 3 Less than 0 3 Less than 0 3 O a chlorine i l Kree carbon mgCO Less than 4 0 i Less than 4 0 Less than 4 0 Less than 4 0 Less than 4 0 Stability index 6 0 7 0 z y S o Notes 1 The item names their definitions and units are based on the standard JISK0101 The units and figures inside the parentheses are based on the conventional units written fore reference 2 The circle marks in the columns on the right indicate tendency for corrosion or scale to develop 3 Corrosion has a tendency to occur when water temperature is high 40 C or higher and if metals with no protective coating whatever are directly exposed to water it would be a good idea to take effective measures against corrosion such as adding a corrosion inhibitor or deaeration treatment 4 In a condenser water circuit that uses a closed cooling tower Condenser water and make up water must satisfy its water quality standards for hot water system and passing water and make up water must satisfy those for condenser water systems 5 Supply or make up water should be city water from water works or water for industrial use Pure water neutral water o
33. ceeds the limit flow rate specified for the chiller consider providing a snubber tank e Loss resistance Select a pipe size so that its loss resistance for 1m is within 30 to 100 mmH2O and the passage water speed must be less than 3m for larger size Selection of circulation water pump 54 lt lt CORRECT gt
34. ch as adding a corrosion inhibitor or deaeration treatment 4 In a condenser water circuit that uses a closed cooling tower Condenser water and make up water must satisfy its water quality standards for hot water system and passing water and make up water must satisfy those for condenser water systems 5 Supply or make up water should be tap water from water works or water for industrial use Pure water neutral water or softened water should not be used 6 The 15 items in the table above represent typical causes of corrosion and scale 50 lt WRONG gt 5 Reference 2 Air Conditioning Equipment Design Procedure The air cooled heat pump chiller UWY is a heat source unit for a centralized cooling heating system and when combined with air handling units AV or fan coil units FW the chiller can be used for cooling or heating Select an optimum combination out of various UWY centralized cooling heating systems considering applications and shapes of buildings surrounding conditions maintenance control etc Design Conditions e Ambient temperature Use the ambient temperature that creates the maximum difference from the sol air for at cooling or heating temperature e Room temperature for cooling or heating e Operating time Pay special attention to buildings such as bars or amusement halls where air conditioning equipment is used at different time of a day compared with ordinary office buildings Ai
35. completely before the cold season Condenser drain plug Rear After a prolonged idle time you should turn the power supply switch on at least six hours before running the chiller again This is done in order to provide electricity to the crank case heater Condenser drain plug Front Drain plug dimensions Condenser Condenser Models Cooler Front Rear C7 UWJ1320B5Y C7 UWJ1700B5Y PT3 4 PT1 4 PT1 2 CUWE6O0ASY C7 UWJ2650B5Y C7 3350B5Y CUW120A5Y PT1 PT1 4 PT1 2 lt WRONG gt 43 11 Operation and Installation Precautions in Usage i Precautions in usage Except when not planning to use the unit for an extended period of time do not turn OFF the power for any reason whatsoever even while the unit is merely stopped This ensures power is supplied to the heater even while the compressor is stopped which makes the next start smoother Wi Machine oil The unit uses a special type of machine oil therefore do not mix in other types of oil Contact DAIKIN or the nearest service center to add or change machine oil The machine oil used in this unit SUNISO 4GSD i Means of reading pressure When the compressor starts up gauges will indicate pressure accordingly While cooling regulate condenser water flow rate in order that discharge gas pressure does not rise too far above the value below Discharge gas pressure when cooling 16kg cm 12kg cm Note
36. ct your DAIKIN dealer Do not attempt to repair the problem yourself When you call you should be prepared to give a description of the state of trouble and the model see pages 24 25 A Warning e Ifa malfunction occurs burning smell etc turn off the power supply switch and contact your DAIKIN dealer Continuing to operate while the chiller is malfunctioning can result in equipment damage electrical shock or fire 46 lt lt CORRECT Operation and Installation i Safety devices EMERGENCY lamp lights when tripped The chiller is equipped with safety devices to ensure safe operation When a safety device is tripped the EMERGENCY lamp lights and the chiller stops The chilled water pump continues to operate when a safety device other than the overcurrent relay pump motor trips Safety device Example causes 1 Pressure switch High pressure protection 1 Either condenser water is not circulating or the water level is too low 2 Condenser water temperature is abnormally high 3 Scale or fungus has accumulated inside the condenser 2 Temperature switch Freeze protection 1 There is an extremely small amount of chilled water 2 The thermostat is set lower than the standard setting 3 Temperature switch Discharge gas 1 The unit is short of refrigerant due to leaking 2 Injection solenoid remains closed because of damage 3 Condenser outlet stop valve is closed
37. dense in the water cause the water to become corrosive Correct Incorrect N fee Discharge pipe Discharge pipe lt ti 5 Water tank Sueti n pips Water tank J me p Suction pipe The discharge outlet must be below the water level of the water tank Do not ground any other electrical equipment to the chiller s water piping This may cause electrolytic corrosion in some cases Be sure to take rust prevention measures for piping buried in the ground Note the flow speed of water in the system the position of the expansion tank and the position of the air purge plug in the piping so that cavitation is not produced Hi Condenser water quality To keep the chiller operating to its full potential over an extended period of time you should keep condenser water as clean as possible Poor water quality reduces cooling performance and contributes to greater power consumption It can also significantly shorten the life of the chiller For water standards see Water quality on page 50 1 Precautions concerning water quality Use tap water to fill the water tower lf using water from any source other than tap water be sure to check the quality of the water If the quality is substandard you must add chemicals or increase drainage Scale particularly tends to build up on the condenser when using well water For details contact your DAIKIN dealer
38. eat exchangers and water may become reddened due to rust This however causes no problem for normal operation lt WRONG gt 31 4 Operation and Installation 4 Before Your Test Run In order to protect the equipment you should check the following before attempting test run It would also be a good idea to read SAFETY once more before starting Js the power supply properly connected The required power supply is as follows Power supply 3 phases 380 400 415 400 440V 50 60Hz Make sure the water drains of the condenser and evaporator are completely closed Does the transformer match the power supply and is the reverse phase protector properly connected Factory set 50Hz 400V 60Hz 400 440V Has the chiller been grounded Js the water pump s interlock circuit connected The power supply should be turned on six hours prior to operation to ensure that the compressor operates smoothly Js the water pump filled with water If not open the water supply faucet and fill the water system with water while purging air from the system Condenser drain valve Cooler drain valve 32 lt WRONG gt 5 Operation and Installation Preparations 1 Turn the power supply switch ON The unit comes with a crank case heater To ensure the compressor starts up smoothly leave this switch in the ON position during long periods of use or otherwise activa
39. eating Ordinary building 1 0 during cooling and heating same rate for heating and cooling Building conditions e Air conditioning area Pay careful attention when using corridors etc for routing return circuits using ducts etc The return circuits must be included in the air conditioning area e Structure Load calculation 5 e Calculate design load according to the above conditions Selection of air cooled heat pump chillers e Determination of water temperature Chiller outlet water 5 C to 7 C for chilled water temperature during cooling and 43 C to 47 C temperature for hot water temperature during heating When designing for ordinary houses set the hot water temperature during heating to 45 C to 50 C to shorten the heating startup time e Required capacity of the chiller UWY load x simultaneous use rate x 1 1 Chiller UWY capacity gt Required capacity heat loss Select a chiller UWY to satisfy both the cooling and heating capacities Selection of an air conditioner e Select an air conditioner that satisfies both the cooling and heating capacities For many houses air conditioners are used for cooling or heating individual rooms not for all the rooms Therefore when selecting an air conditioner assume that surrounding rooms are not air conditioned Determining piping size e Circulation water Determine the circulation water flow rate based on the air conditioner side When the flow rate flow rate ex
40. ed chiller is receiving electricity The chiller is equipped with a pump for preventing water inside the piping from freezing that force operates For details see the wiring diagram Electricity is supplied to the crank case heater to warm the compressor so that the chiller can be started smoothly This is not a malfunction Before requesting after sales service please check the following items State of trouble Operaion Cause Disposal lamp Water pump Was there a power failure To be safe turn the power supply switch compressor doesn t off temporarily start at all off Is the power supply switch Turn the power supply switch on turned on Is the power supply fuse Replace the power supply fuse blown The water pump Is their a lack of make up Replenish sufficiently with make up starts but water water water Water is not pumped unless the doesn t circulate water pump and suction pipe are filled with water Off Is the water pump turning Correct the turning direction of the water in reverse pump Set to clockwise as seen from the motor Is the valve in the water Open the valve in the water piping piping open sufficiently sufficiently Chilled water Is the water supply valve Open the water supply valve of chilled temperature is of chilled water expansion water expansion tank abnormal d tank opened enough n Is the thermostat properly Properly adjust the thermostat adjust
41. ed See Temperature control thermostat page 36 Compressor stops Are the chilled and Open the flow regulating valve properly while cooling and condenser water flow will not restart regulating valve open automatically properly Off Is the thermostat properly Properly adjust the thermostat adjusted See Temperature control thermostat page 36 Is the strainer for the condenser water line clogged Clean the strainer lt lt CORRECT 45 4 Operation and Installation State of trouble Operation lamp Cause Disposal Compressor stops shortly after cooling starts A few moments later the unit restarts after pressing the pressure switch High pressure protection reset button and START button Is condenser water flowing to the condenser Is water level low Supply a sufficient amount of condenser water Is the condenser water pump operating Operate the condenser water pump Is the condenser line strainer clogged Clean the strainer For system with cooling tower 1 ls the tower fan rotating in reverse Has it stopped 2 Is the tower strainer clogged 3 Ils the nozzle clogged See the cooling tower instruction manual 1 Set fan rotation in the correct direction 2 Clean the strainer 3 Inspect and clean lf after checking the items given above the chiller is still not functioning properly conta
42. erminal is provided in the switch box for that purpose For the connection method refer to the wiring diagram on the front cover of the switch box Earth leakage circuit breaker Wire so that the water pump can be operated independently This is done so the pump can be operated in order to prevent freezing when the inside water Power supply switch temperature drops low outdoor temp etc Transformer and reverse phase protector are set to 400 400 440V 50 60Hz If power supplies differ modify connection to match supply power supply 380V 415V etc in accordance with the wiring diagram 28 lt WRONG gt Operation and Installation i Water piping work Be sure to install a strainer on the water inlet side and provide a dirt pocket in a suitable A CAUTION place Be careful not to install the water inlet and outlet inversely If sand dirt or rust gets into the water system the metal materials will become mechanically If the inlet and outlet are connected inversely corroded the chiller will not function properly and could furthermore be damaged The strainer and dirt pocket require periodic maintenance Select a location that allows space for maintenance The chiller does not come with an attached water pump Be sure to install a water pump Water Expansion tank that matches piping resistance piblng work lnstall a flow regulating valve gate valve on the outlet i
43. essure and suction pressure of the pressure gauge when the compressor starts If the pressure is abnormal stop operation and consult with your DAIKIN dealer 34 lt WRONG gt Operation and Installation C7 UWJ2650 3350B5Y CUW120A5Y EMIF MASTER CONTROL fk Uty b EE STOP RESET OPERATION BERRI OPERATION RBRARIT ALARM The operation lamp then lights and the chiller starts running fe Wale m The compressor starts a little later 1 Push the OPERATION button Hi To stop the unit Push the STOP RESET button The chiller then stops running Do not shut off the power Stop the chilled water and condenser water pumps See Preparations on page 33 Close all valves See Preparations on page 33 NOTE Check the rotation direction of the compressor To check the rotation direction of the compressor check the discharge pressure and suction pressure of the pressure gauge when the compressor starts If the pressure is abnormal stop operation and consult with your DAIKIN dealer lt WRONG gt 35 4 Operation and Installation E Temperature control thermostat The Thermostat is contained in the switch box inside the chiller See Names of Parts on pages 24 25 Set water temperature with the thermostat Capacity is automatically controlled to keep water temperature constant Referring to the scale set the knob
44. evices trips the OPERATION lamp goes out and the ALARM lamp lights up In such case locate and eliminate the cause of the trouble see page 45 and push the STOP RESET button Only then will the ALARM lamp go out and can the unit be restarted Note if the pressure switch high pressure protection trips follow the instructions on page 48 to reset the unit DISCHARGE C7 UWJ1320 1700B5Y SUCTION CUW60A5Y OPERATION lamp MASTER CONTROL STOP RESET OPERATION STOP RESET button OPERATION button J Pressure switch High pressure side DISCHARGE L pressure gauge C7 UWJ2650 3350B5Y CUW120A5Y ALARM lamp OPERATION lamp D AA NV 4 Of MASTER CONTROL PEN N J ALARM OPERATION STOP RESET OPERATION gt fos j N f f DISCHARGE R pressure gauge STOP RESET button OPERATION button SUCTION R pressure gauge 22 lt lt CORRECT 4 Operation and Installation 1 Names of Parts C7 UWJ1320B5Y C7 UWJ1700B5Y CUW60A5Y Manufacturers label Switch box Power supply terminal strip Chilled water outlet Rear of main unit 24 lt lt CORRECT Operation and Installation C7 UWJ2650B5Y C7 UWJ3350B5Y CUW120A5Y i SAH Manufacturers label Compressor Evaporator Power source intake R ag Hj J
45. h the STOP RESET button The chiller then stops running Do not shut off the power Stop the chilled water and condenser water pumps See Preparations on page 33 Close all valves See Preparations on page 33 NOTE Check the rotation direction of the compressor To check the rotation direction of the compressor check the discharge pressure and suction pressure of the pressure gauge when the compressor starts If the pressure is abnormal stop operation and consult with your DAIKIN dealer lt CORRECT gt m 4 Operation and Installation i Temperature control thermostat The Thermostat is contained in the switch box inside the chiller See Names of Parts on pages 24 25 Set water temperature with the thermostat Capacity is automatically controlled to keep water temperature constant Referring to the scale set the knob so that cooling is normally 12 C The thermostat setting scale is as shown in the figure on the right The values are a guideline for chiller inlet water temperature When actually setting the thermostat adjust within the working range see page 49 eee while referring to the thermometers on the various chilled water pipes 19 ie Set the thermostat so that temperature at the outlet does not drop below 22 9 5 C while cooling The temperature switch freeze up prevention trips at 24 Hi C L6 5 C whereby stopping the chiller capacity becomes exces
46. ing range given above Pull down duration Within one hour at no load Cooling capacity and input According to JISB8613 Start stop interval of compressor Max 6 operating and stopping times within one hour Chilled and condenser water quality JRA GL 02 water quality standard for chilled water system See following page No soluble matters deteriorating copper and stainless steel shall be included Chilled and condenser water velocity 0 6 1 5 m sec Shell cooler 0 7 2 5 m sec Shell condenser Chilled and condenser water pressure Less than 0 69MPa 7 kg cm shall apply Installing location Indoor Take measures to keep rain off equipment Water dripping out of machine Refer to technical reference materials for items not listed above Provide foundation with pit for various drainage lt WRONG gt 49 4 Operation and Installation W Water quality The quality of chilled hot water and condenser water when the chiller is running largely affects the chiller s performance and life It is therefore very important to check the quality of before using and to monitor the quality of water after installing the chiller Water quality standard values are as shown in the table below according to Japan Refrigeration and Air Conditioning Industry Association JRA Water quality of make up water and circulating water should be checked separately with a certain amount
47. ing water warranty card fuse Instruction manual warranty card fu pad warning sign se foundation bolt vibration isolating In case of modified heat pump Only the specifications different from standar d specifications are indicated Capacity 0 Hz kW 46 8 52 7 175 204 212 240 Hot water 50 flow rate legt2 2 min 134 151 502 586 606 690 Chilled water flow rate VegHZ 2 min 60 66 226 256 271 302 Hot water thermostat Notes Electronic thermostat for chilled water 31 The values shown are based on leaving chilled water outlet temperature of 7 C inlet outlet temperature difference of 5 C and condenser water inlet temperature of 30 C D B 2 The values shown are based on leaving hot water outlet temperature of 45 C inlet outlet temperature difference of 5 C and chilled water inlet temperature of 15 5 C D B lt lt CORRECT Specifications Water chilling unit Water cooled type C7 UWJ2650B5Y C7 UWJ3350B5Y CUW120A5Y CUW240A5Y Capacity Hz 236 265 300 335 355 400 760 800 Chilled water 50 flow rate 60Hz 677 760 860 960 1018 1147 2178 2294 Pressure drop Hz 841 960 1064 1214 1266 1449 2550 2910 Power source 3 phase 380 400 415V 400 440 VAC 50 60Hz 3 phase 380V 50Hz Control power source Single
48. m sec Shell evaporator 0 7 2 5 m sec Shell condenser Chilled and condenser water pressure Less than 0 69MPa 7 kg cm shall apply Installing location Indoor Take measures to keep rain off equipment Water dripping out of chiller Refer to technical reference materials for items not listed above Provide foundation with pit for various drainage lt lt CORRECT gt gt 49 4 Operation and Installation W Water quality The quality of chilled hot water and condenser water when the chiller is running largely affects the chiller s performance and life It is therefore very important to check the quality of before using and to monitor the quality of water after installing the chiller Water quality standard values are as shown in the table below according to Japan Refrigeration and Air Conditioning Industry Association JRA Water quality of make up water and circulating water should be checked separately with a certain amount of make up water and blow while maintaining circulating water standards Water should be treated with chemicals as required Water quality standards for condenser water chilled water hot water and make up water From JRA GL 02 1994 Guideline of Water Quality for Refrigerators and Air Conditioning Equipment gt lt JRA Japan Refrigeration and Air Conditioning Industry Association Condenser water
49. ndenser water pump Is the condenser line strainer clogged Unclog the strainer For system with cooling tower 1 ls the tower fan rotating in reverse Has it stopped 2 Ils the tower strainer clogged 3 Ils the nozzle clogged See the cooling tower instruction manual 1 Set fan rotation in the correct direction 2 Unclog the strainer 3 Inspect and clean lf after checking the items given above the chiller is still not functioning properly contact your DAIKIN dealer Do not attempt to repair the problem yourself When you call you should be prepared to give a description of the state of trouble and the model see pages 24 25 A Warning e If a malfunction occurs burning smell etc turn off the power supply switch and contact your DAIKIN dealer Continuing to operate while the chiller is malfunctioning can result in equipment damage electrical shock or fire 46 lt WRONG gt Operation and Installation i Safety devices EMERGENCY lamp lights when tripped The chiller is equipped with safety devices to ensure safe operation When a safety device is tripped the EMERGENCY lamp lights and the chiller stops The chilled water pump continues to operate when a safety device other than the overcurrent relay pump motor trips Safety device Example causes 1 Pressure switch High pressure protection 1 Either condenser water is not circulating or
50. nlet water piping p Water Drain pipe nstall a thermometer on the water inlets and supply valve outlets This helps you know the operating condition of the chiller Sluice valve The connection diameter is the same Strainer as piping Use an item of same or larger Chilled Water pump diameter water inlet Unit Be sure to cold insulate chilled water piping with anti sweating tubing Chilled water outlet Thermometer Water quality standards for chilled water Gate valve specify circulating water as a premise See water quality standards on page 50 Using sub standard water could result in corrosion kKeep the water level within the operating range We recommend using approx 70 150 rated water level If the level is too low performance could be reduced by adherence of scale the freeze prevention sensor could be tripped or gas leaks could develop due to pitting corrosion If the level is too high it could result in corrosion Using the flow rate adjustment valve on the chillers outlet adjust the flow rate so that the difference in inlet and outlet water temperature is about 5 C when operating with a full load Check the flow direction if the unit is equipped with a flow switch lt WRONG gt 29 Operation and Installation Do not aerate water in the water circulation system as shown in the figure below Aerating the water causes the dissolved oxygen to increase and pollutants in the atmosphere to con
51. nning If valves are open or closed when they shouldn t be water may leak and in worse cases The equipment may catch fire or explode lt would be a good idea to read SAFETY once more before starting inspection Be sure to let other maintenance technicians know that you are going to inspect the chiller Place an under inspection warning curtain on the switch box Drain some of the water from the air purge plug If the water is dirty replace all the water in the system Dirty water reduces operating capacity and causes corrosion of water heat exchangers and piping Check if the water volume has strayed from the operating range due to the strainer being clogged or the flow Even after air is purged at the beginning air can still get inside the system You should continue to purge the system We recommend you enter a contract for maintenance with a DAIKIN after sales service center or dealer capable of 40 lt WRONG gt Operation and Installation i Daily checks To maintain the unit in prime operating condition check the following items daily making adjustments where necessary and keeping a record of all checks Values under Passing grade are indicated for refrigerating machines under typical operating conditions When to check Check item Check method Passing grade Results Daily 1 Discharge pressure Check the pressure gauge 1 1 1 7MPa When cooling 1 5 1 8MPa When he
52. of make up water and blow while maintaining circulating water standards Water should be treated with chemicals as required Water quality standards for condenser water chilled water hot water and make up water From JRA GL 02 1994 Guideline of Water Quality for Refrigerators and Air Conditioning Equipment gt lt JRA Japan Refrigeration and Air Conditioning Industry Association Condenser water system 4 Chilled wat illed water Pass through t Tendency 2 Circulation system system system Item 1 6 Fi Circulation Make up Passing a Make up Corrosion Scale water water water Max 20 C water deposit pH 25 C 6 5 8 2 6 0 8 0 6 8 8 0 6 8 8 0 6 8 8 0 o o Electrical mS m 25 C 4 Less than 80 Less than 30 Less than 40 Less than 40 Less than 30 o o Conductivity 4 S cm 25 C Less than 800 Less than 300 Less than 400 Less than 400 Less than 300 Chloride ions mgcl g Less than 200 Less than 50 Less than 50 Less than 50 i Less than 50 O i 7 Sulfate ions mgSO g Less than 200 Less than 50 Less than 50 Less than 50 Less than 50 O i Acid consumption pH4 8 E mgCaCOs Less than 100 i Less than 50 Less than 50 Less than 50 Less than 50 i O Total hardness mgCaCO3 Less than 200 i Less than 70 Less than 70 Less than 70 i Less than 70 i O Calcium mgCaCO Less than 1
53. p and suction pipe are filled with water Off Is the water pump turning Correct the turning direction of the water in reverse pump Set to clockwise as seen from the motor Is the valve in the water Open the valve in the water piping piping open sufficiently sufficiently Compressor does Is the chilled water Open the chilled water regulating valve not work but the regulating valve opened thermostat does enough On Is the thermostat properly Properly adjust the thermostat adjusted See Temperature control thermostat page 36 Compressor stops Are the chilled and Open the flow regulating valve the while cooling and condenser water flow proper amount will not restart regulating valve open the automatically proper amount Off Is the thermostat properly Properly adjust the thermostat adjusted See Temperature control thermostat page 36 Is the strainer for the condenser water line clogged Unclog the strainer lt WRONG gt 45 4 Operation and Installation State of trouble Operation lamp Cause Disposal Compressor stops shortly after cooling starts A few moments later the unit restarts after pressing the pressure switch High pressure protection reset button and START button Is condenser water flowing to the condenser Is water level low Supply a sufficient amount of condenser water Is the condenser water pump down Activate the co
54. phase 200 VAC 50 60Hz 220VAC 50 60Hz Type Water chilling unit Water cooled type Exterior Ivory white 5Y7 5 1 External dimensions 1310x2835x900 1525x2785x995 1525x2840x980 2180x2855x1455 Model ZH3LSFYE ZH3LSFYB ZH5MLEYE ZHS5MLFYB ZH5LLFYE ZH5LLFYB ZH9SLFCYE Type Semi hermetically sealed single scroll type Semi hermetic single screw type Motor outputxNo of units 30x2 37x2 40x2 90x2 Compressor Starting system J A start Model CXC1920 CXC2120 1 CXC2420 14 CF4520 C12 Type Shell and cross fine tube type Heat exchanger on water side No of units 2 Model DHG2724 DHG3222 DHG3224 DHD4020 C24 Type Shell and HI X tube type Dry Expansion shell and Hi x Tube Type No of units 2 g Q Q gt if 1 2 Refrigerant control Thermal expansion valve Thermostat Electronic thermostat for chilled water Capacity control 100 70 40 20 0 Insulation material Foam polyethylene Protection device See page 13 Refrig Name R22 erant Charge 16x2 60x2 Refriger Name SUNISO 4GSD ation oil Charge 7 5x2 10x2 14x2 Condenser water inlet outlet PT3 Internal thread PT4 Internal thread 6B flange connect to 9159 tube Chilled water inlet outlet
55. r conditioning load fluctuations particularly cooling load changes are large in these buildings e Operating period e Startup time Pay attention to cases where operating time is limited Places like a public hall must be cooled or heated to a specified level before they are actually used e Simultaneous use rate Be sure to consult with clients for determining the rate of simultaneous use Houses 0 4 to 0 6 during cooling 0 6 to 0 8 during heating Ordinary building 1 0 during cooling and heating same rate for heating and cooling Building conditions e Air conditioning area Pay careful attention when using corridors etc for routing return circuits using ducts etc The return circuits must be included in the air conditioning area e Structure Load calculation e Calculate design load according to the above conditions Selection of air cooled heat pump chillers e Determination of water temperature Chiller outlet water 5 C to 7 C for chilled water temperature during cooling and 43 C to 47 C temperature for hot water temperature during heating When designing for ordinary houses set the hot water temperature during heating to 45 C to 50 C to shorten the heating startup time e Required capacity of the chiller UWY load x simultaneous use rate x 1 1 Chiller UWY capacity gt Required capacity heat loss Select a chiller UWY to satisfy both the cooling and heating capacities Selection of an air conditioner
56. r softened water should not be used 6 The 15 items in the table above represent typical causes of corrosion and scale 50 lt lt CORRECT 5 Reference 2 Air Conditioning Equipment Design Procedure The air cooled heat pump chiller UWY is a heat source unit for a centralized cooling heating system and when combined with air handling units AV or fan coil units FW the chiller can be used for cooling or heating Select an optimum combination out of various UWY centralized cooling heating systems considering applications and shapes of buildings surrounding conditions maintenance control etc Design Conditions e Ambient temperature Use the ambient temperature when the sol air temperature is maximum at cooling or heating e Room temperature for cooling or heating e Operating time 0 Pay special attention to buildings such as bars or amusement halls where air conditioning equipment is used at different time of a day compared with ordinary office buildings Air conditioning load fluctuations particularly cooling load changes are large in these buildings e Operating period e Startup time Pay attention to cases where operating time is limited Places like a public hall must be cooled or heated to a specified level before they are actually used e Simultaneous use rate Be sure to consult with clients for determining the rate of simultaneous use Houses 0 4 to 0 6 during cooling 0 6 to 0 8 during h
57. rds on page 50 Using sub standard water could result in corrosion kKeep the water level within the operating range We recommend using approx 70 150 rated water level If the level is too low performance could be reduced by adherence of scale the freeze prevention sensor could be tripped or gas leaks could develop due to pitting corrosion If the level is too high it could result in corrosion Using the flow regulating valve on the chillers outlet adjust the flow rate so that the difference in inlet and outlet water temperature is about 5 C when operating with a full load Check the flow direction if the unit is equipped with a flow switch lt lt CORRECT gt 29 Operation and Installation Do not aerate water in the water circulation system as shown in the figure below Aerating the water causes the dissolved oxygen to increase and pollutants in the atmosphere to condense in the water cause the water to become corrosive Correct Incorrect b e Discharge pipe Discharge pipe lt _ Suction pipe Suction pipe Water tank Water tank J S5 A The discharge outlet must be below the water level of the water tank Do not ground any other electrical equipment to the chiller s water piping This may cause electrolytic corrosion in some cases Be sure to take rust prevention measures for piping buried in the ground Note the flow speed of water in the sy
58. ry Expansion shell and Hi x Tube Type No of units 9 oO 2 fe a ra gt Lu 1 2 Refrigerant control Thermal expansion valve Thermostat Electronic thermostat for chilled water Capacity control 100 70 40 20 0 Insulation material Foam polyethylene Protection device See page 13 Refrig Name R22 erant Charge 16x2 60x2 Refriger Name SUNISO 4GSD ation oil Charge 7 5x2 10x2 14x2 Condenser water inlet outlet PT3 Internal thread PT4 Internal thread 6B flange connect to 6159 tube Chilled water inlet outlet 4B Flange JIS10kK 5B Flange JIS10K Inlet 6B flange connect to b 159 tube Outlet 5B flange connect to 140 tube Pipe con Drain outlet PT1 Internal thread for chilled water PT11 Internal thread for cooling water Weight operating weight kg 1395 1500 1790 1925 1930 2085 4880 5380 Standard accessories Instruction manual warranty C ard fuse foundation bolt vibro isolating pad warning sign Operation manual fuse war ranty mating flange In case of modified heat pump Only the specifications different from standard specifications a re indicated Capacity E0soHz kW 277 319 350 403 422 485 838 985 Hot water flow rate amp min 0 s0H2 795 914 1004 1156 1197 1380 2405 2755 Chilled water
59. sive the compressor s unloader is tripped by the thermostat and capacity is reduced as follows ENTG TEMPERATRE APPROXx C7 UWJ1320B5Y C7 UWJ1700B5Y CUW60A5Y 100 gt 70 gt 40 C7 UWJ2650B5Y C7 UWJ3350B5Y CUW120A5Y CUW240A5Y 100 gt 70 gt 40 gt 20 If capacity becomes more excessive the compressor will stop In such case the operation lamp will stay lit Then when the load rises the chiller automatically restarts as indicated below If the load becomes larger sequential operation is executed in the opposite order of the previously mentioned capacity reduction 36 lt lt CORRECT Operation and Installation i ALARM lamp When one of the unit s safety devices trips the OPERATION lamp goes out and the ALARM lamp lights up In such case locate and eliminate the cause of the trouble see page 47 and push the STOP RESET button Only then will the ALARM lamp go out and can the unit be restarted Note if the pressure switch high pressure protection trips follow the instructions on page 48 to reset the unit E Selecting thermostat differential When the chiller cannot be used within the recommended working range see page 49 because retained water level is low or for other reason set thermostat differential changeover switch SS1 to 4 C The factory setting is 2 C NOTE Do not change the setting while power is ON to prevent trouble from occurring with the chiller
60. so that cooling is normally 12 C The thermostat setting scale is as shown in the figure on the right ARs AD kKmOB ETT o The values are a guideline for machine inlet water temperature When actually setting the thermostat adjust within the working range see 1o page 49 while referring to the thermometers on the various chilled 19 fe water pipes 22 9 Set the thermostat so that temperature at the outlet does not drop below 5 C while cooling The temperature switch freeze up prevention trips at 2A 5 C whereby stopping the chiller Hi Lo lf capacity becomes excessive the compressor s unloader is tripped by ENTG TEMPERATRE APPROxX the thermostat and capacity is reduced as follows C7 UWJ1320B5Y C7 UWJ1700B5Y e CUW60A5Y 100 gt 70 gt 40 C7 UWJ2650B5Y C7 UWJ3350B5Y e CUW120A5Y e CUW240A5Y 100 gt 70 gt 40 gt 20 If capacity becomes more excessive the compressor will stop In such case the operation lamp will stay lit Then when the load rises the chiller automatically restarts as indicated below If the load becomes larger sequential operation is executed in the opposite order of the previously mentioned capacity reduction 36 lt WRONG gt Operation and Installation Hi ALARM lamp When one of the unit s safety devices trips the OPERATION lamp goes out and the ALARM lamp lights up In such case locate and eliminate the cause of the trouble see page 47 and push the
61. stem the position of the expansion tank and the position of the air purge plug in the piping so that cavitation is not produced Hi Condenser water quality To keep the chiller operating to its full potential over an extended period of time you should keep condenser water as clean as possible Poor water quality reduces cooling performance and contributes to greater power consumption It can also significantly shorten the life of the chiller For water standards see Water quality on page 50 1 Precautions concerning water quality Use city water to fill the water tower Jf using water from any source other than city water be sure to check the quality of the water If the quality is not complied with standard you must add chemicals or increase drainage Scale particularly tends to build up on the condenser when using well water For details contact your DAIKIN dealer 30 lt lt CORRECT gt Operation and Installation Do not install the cooling tower near to exhaust outlets such as smokestacks Smoke and corrosive gases drawn into the cooling tower will contaminate water inside and may eventually lead to corrosion inside the water chiller 2 Maintenance and checks Condenser water circulation water is affected by concentration of dissolved oxygen caused by constant evaporation of water in the cooling tower Forced blow water lines repeatedly drain and refill the system
62. te power at least 6 hours before starting the unit 2 Fill the system with water lf the system has a cooling tower make sure the gate valve regulating water flow is open before starting up the tower and the condenser water pump Also with wells make sure the gate valve regulating water flow is open before starting the condenser water pump 3 Set water circulating Purge the system To purge the system open the air purge plug on the water chilling unit and the air purge cock on the fan coil unit When the unit is filled with water close the cock Note The air purge plug is on the water outlet 0Open the gate valve regulating water flow before starting the chilled water pump lt WRONG gt 33 4 Operation and Installation 6 How to Operate the Chiller C7 UWJ1320 1700B5Y CUW60A5Y We OPERATION g MASTER CONTROL FEZI ty h E STOP RESET OPERATION The operation lamp then lights and the chiller starts running fe 4 7 uo E The compressor starts a little later 1 Push the OPERATION button Hi To stop the unit Push the STOP RESET button The chiller then stops running Do not shut off the power Stop the chilled water and condenser water pumps See Preparations on page 33 Close all valves See Preparations on page 33 NOTE Check the rotation direction of the compressor To check the rotation direction of the compressor check the discharge pr
63. ter heat exchangers and piping Check if the water volume is out from the operating range due to the strainer being clogged or the flow regulating Even after air is purged at the beginning air can still get inside the system You should continue to purge the system We recommend you to enter a maintenance contract with a DAIKIN after sales service center or dealer capable of 40 lt lt CORRECT Operation and Installation i Daily checks To maintain the unit in prime operating condition check the following items daily making adjustments where necessary and keeping a record of all checks Values under Passing grade are indicated for chiller under typical operating conditions When to check Check item Check method Passing grade Results Daily 1 Discharge pressure Check the pressure gauge 1 1 1 7MPa When cooling 1 5 1 8MPa When heating 2 Discharge pressure difference between left and right compressors for 2 compressor circuits Check the pressure gauge Max 0 1MPa 3 Suction pressure Check the compound gauge 0 3 0 6MPa When cooling 0 3 0 6MPa When heating 4 Suction pressure difference between left and right compressors for 2 compressor circuits Check the compound gauge Max 0 05MPa 5 Power supply Check the voltmeter Within 10 of the rated voltage 6 Condenser water temperature at outlet Check the thermometer 30 40
64. the water level is too low 2 Condenser water temperature is abnormally high 3 Scale or fungus has accumulated inside the condenser 2 Temperature switch Freeze protection 1 There is an extremely small amount of chilled water 2 The thermostat is set lower than the standard setting 3 Temperature switch Discharge gas 1 The unit is short on refrigerant due to leaking 2 Injection solenoid remains closed because of damage 3 Condenser outlet stop valve is closed 4 Temperature switch Compressor motor protection 1 Same as for high pressure switch high pressure protection 5 Pressure switch Low pressure protection 1 Expansion valve remains closed because of damage 2 Condenser outlet stop valve is closed 3 Chilled water level is extremely low 6 Reverse phase protection relay 1 The power supply is connected by reverse phase 7 Over current relay Compressor motor 1 Same as for pressure switch high pressure protection lt WRONG gt 47 4 Operation and Installation Hi What to do when the pressure switch high pressure protection trips The pressure switch high pressure protection has to be reset manually If either of these safety devices trips the chiller will not restart when the STOP RESET button is pressed The moment that the operation button is pressed the ALARM lamp will light up You must push the reset button and then push the STOP RE
65. to prevent water quality deterioration When the cooling tower runs for long periods of time water quality deteriorates leading possibly to scale deposits or corrosion inside the condenser For details contact your DAIKIN dealer lf the cooling tower is not equipped for forced blow periodically change water inside 3 Condenser cleaning Clean the condenser about once every season When the cooling tower runs for long periods of time scale and fungus may form inside This lowers cooling capacity which may cause one of the safety devices to trip from time to time and possibly prevent you from using the unit as you would normally n areas where water quality cannot be ensured clean the condenser more frequently For help on cleaning cycles and how to clean the equipment contact the place of purchase 4 Concerning red water chilled water and condenser water lron is used for piping and heat exchangers and water may become reddened due to rust This however causes no problem for normal operation lt lt CORRECT gt 31 4 Operation and Installation 4 Before Your Test Run In order to protect the equipment you should check the following before attempting test run It would also be necessary to read SAFETY once more before starting Js the power supply properly connected The required power supply is as follows Power supply 3 phases 380 400 415 400 440V 50 60Hz M
66. viding a drainage ditch etc as needed See pages 24 25 for the location of the drain outlet Wi Grounding Power supply C class grounding Grounding work 3 phases 380 400 3rd class grounding in 415V 400 440V 50 60HZz particular To prevent electric shocks be sure to ground the equipment Qualification are required to perform the grounding work H Electrical work The nominal output of the chiller differs from that of a conventional electric motor Be sure to select the size of the power supply cable in accordance with the specified instructions for external wiring For details consult with your DAIKIN dealer Be sure to provide a power supply with a power supply switch and earth leakage circuit breaker Be sure to connect an interlock so the compressor cannot be operated if the switch of the condenser water pump and chilled water pump is not on A spare terminal is provided in the switch box for that purpose For the connection method refer to the wiring diagram on the front cover of the switch box Earth leakage circuit breaker Wire so that the water pump can be operated independently This is done so the pump can be operated in order to prevent freezing when the inside water temperature drops low outdoor temp etc Power supply switch Transformer and reverse phase protector are set to 400 400 440V 50 60Hz If power supplies differ from above modify connection to match power supply 380V

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