水冷螺杆冷水机组使用说明书英文版本资料

1、Installation & Operation manualScrew Type Water Cooled ChillerNanjing Lidesheng Machinery CO. L TD.ContentPart 1 Installation and maintenanceIntroduction 2Schema tic drawing for service clearance 3Schema tic drawing for hoisting 4Setup and maintenanceeeeeeeeeeeeeeeeeeeee5Part 2 Controlling and handl

2、ing12IntroductioneeeeeeeeeeeeeeeeeeeeeeeePart 1 Installation and maintenanceIntroductionMENERGY MSSH serial Water-cooled Screw-type Chiller, which is concisely designed, applies the advanced semi-enclosed dualscrew compressor and the higheffective heat exchange tube with the most updated technologie

3、s, and can be controlled through the advanced microcomputer. This product has advantagesof stable system, low oscillation, high reliability and high effectiveness on energy saving. MENERGY original anti- fever sal program for the compressor can strengthen the running reliability of the chiller. This

4、 product has more than twenty types for being extensively applied in many comfortable or technical situations by the customer.Before the chiller is started up, all the related personnel in charge of setup, startup, operation and maintenance should carefully read through this manual so as to know all

5、 the precautions onsite.Schematic drawing for service clearanceSin gle-head：Dual-head：JrOOu.Schematic drawing for hoistingSin gle-head：Attention! Vse protecting barhe n hoist ins n oQftSi-n8wcDual-head：Attentio nUsa proloclingI bar when hoistingSetup and maintenanceSetup and maintenance of the chill

6、er should only be carried out by a qualified person who has bee n trained professi on ally, and is familiar with local sta ndards and rules and has practical operational experience. The trial running of the chiller must be carried out by the professional service supplier to ensure the quality of the

7、 chiller.Check before acceptanceAfter the device has arrived, check if all the items listed in the delivery order are complete, and any part damaged duri ng tran sportati on should be in formed to the forwardi ng age nt with writte n form for claim. Before setup, check if the local supply voltage, f

8、requency and so on are complying with the chiller. MENERGY will bear no liability for any damage after the device has bee n accepted.HoistingHeavy-duty ropes or chains should be used for hoisting through the hoisting holes of the chiller, and the con trol cab in et a nd other parts of the chiller sh

9、ould be protected from damage whe n hoisti ng (The schematic draw ing for hoist ing in troduced above should be referred to).Environmentai requirementThe chiller is suitable to be used in the en vir onment that the surro unding temperature is -15 C above and the relative humidity is95%, and the grou

10、nd for placeme nt should be horiz on tai and with eno ugh solidity or rein forceme nt measures should be take n (The requirements in the schematic drawings of ground base and service clearanee for the chiller should be referred to).Water quality requirementAs the compositi on of local water is compl

11、icated, the water quality should be check whe n some un com mon water (such as in dustrial waste water, ground water, etc.) is used. If the water quality does not satisfy the requirement for the water used in airconditioning, the water should be treated accordi ng to the Specificati on for Desig n o

12、f In dustrial Recirculat ing Cooli ng Water Treatme nt or other related sta, ndards.ProgramUn itThe request of freezing waterThe request of Cooli ngwaterPermit valuePermit valueSuspe nded solidsmg/Lv 10V 20pH value (25C)mg/L6.5 8.06.5 8.0Conductivity (25 C)卩S/Lv 800v 800Methyl orange alkali nitymg/L

13、V 150v 500Acid con sumption (PH=4.8)mg/Lv 100V 100Wide hard ness CaC03mg/LV 200V 200i- 2+ Femg/LV 1.0V 1.0Cmg/LV 200v 200S042-mg/Lv 200v 200Si02mg/Lv 50v 50NH4 +mg/LV 1.0v 1.02-cmg/LNot allowedNot allowedFree Chlori nemg/Lv 1.0v 1.0Oilmg/Lv 5v 5Water pipesFlow Sv/itchEInlet Of TheTerminalInstallatio

14、nFlexible jointsHFlexible jointsBoth outlet and inlet of the chiller should be equipped with a stop valve, a thermometer and a pressure gauge for routi ne check and maintenance of the water system; and both outlet and inlet of the water pump should be equipped with a stra iner to preve nt impurities

15、 from going into the pump or the vessel; before insulating the heat of the water pipe, the seali ng of the pipeli ne should be checked whe n the water is to go into the chiller; all the pipeli nes conn ected with the chiller should be equipped with vibratio n dampers and flow con trollers (such as w

16、ater flow valves, water pressure differe nee switch, etc. ) as per the requirement; when a device for contamination draining is to be mounted to the water system of the airconditioning engineering, it should be avoided from the pipelines of the outlet and inlet of the chiller, or the normal operatio

17、n of the chiller would be disturbed. Schematic drawing for the external water pipeline systemOutlet Of Termi nal InstallationtherxwDeterPressuremeFlexible joi ntsInlet 0 TheColli nz Tower1 Water Valve-II-PressurePressure匕eTvwtheracoeTer Pressure suageFlo* SwitchA I L5Water filterpuspFlexible joi nts

18、ater ValveDrai n valvePipeline design Installation Notesa) Pipe works must avoid any unnecessary bends and offset (up and down).b) Install gate valve for every joint for service and maintenance.c) Air vent must be instailed at the highest position.Open the air vent to realease the airOutlet 0 TheCol

19、li ng Towertrapped in the water system.d) Water pump mus t ins tall at water return linee) At the lowest point of the pipe work, install a gate valve drain out water.f) At the highest point of the pipe work, install a manual or automatic air ventg) Install strainer before water entering to the water

20、 pump.h) Flush lot of clean water to remove foreign material before unit start up.i) Pressure gauge and thermometer must be instailed at visible and accessible location.Check before starting upWater circuit partCheck all the pipelines of the water system to ensure that the evaporator and the condens

21、er are correctly connected and the water flow direction is correct. Check if the inlet pipe and the outlet pipe of the heat exchanger mentioned above are well connected, and then open all the water valves and start up the corresponded water pump to wash the pipes so as to ensure the water system is

22、clean and check if there is any leakage at the pipes and joints. Discharge the air in the water circuit of the evaporator and the condenser, and the water circuit should be keep clean away from rust Check the resistance loss at the water side of the evaporator and the condenseragainst the water volu

23、me. Check if the temperature transducers are correctly connected. Electrie circuit partCut off the main isolating switch and then check all the startup circuits and control circuits of the control cabinet to ensure all the switches are in off position. Check the power supply to the chiller and the v

24、oltage fluetuition range should be within 10% of therated voltage shown on the nameplate of the compressor, and the unbalance of the phase voltage should be within 2%. Check if there is enough power supply capacity to ensure the startup and full load running of the chiller. Check if all the electrie

25、 wires and fuses have the matched specification with the running of the chiller, and finish all the interlock control circuits according to the related electric control drawing. Check and ensure all the ancillary equipments and control equipments for air-conditioning are in normal operation and have

26、 enough refrigerating capacity to satisfy the running requirement of the chiller at the first operation. Chiller partMake sure that the engine oil heater of the compressor has been electrified for 24 hours, and examine the oil level through the inspecting mirror of the oil separator, and refill oil

27、if the oil level can not be seen. Fully open the manualstop valve on the sparging pipeandremovethe seal bonnet away, and fully open the suetion anddischarge stop valve and thencounterclockwise turn it back for 1/2 circle, and then fully open the liquid supply stop valve and start up the ancillary eq

28、uipments， the condensedwater pump and the refrigeratedwaterpump,and finally check if all the safety control equipments are in original status and ifthesettings are correct See below for the related items for checking.Safety equipmentsThe chiller is equipped with safety protective devices to ensure s

29、afe running, and if one of the safety protective devices is in operation, an error indicator will turn on, and the corresponded function will stop while the other functions will be still normal. It isrecomme nded to stop the chiller for troubleshoot ing to avoid from more serious accide nt only if a

30、ny part becomes abnormal. See vTable 2 for the detailed series of the safety protective devices of the chiller.Table 1: Checking items for safety devicesFreque ncyItemMethodCon trol requireme ntDa订y1. Discharge pressureCheck the indication value of high pressure (discharge)1. Pl. 8Mpa2. Discharge pr

31、essure difference between each running compressorsCheck the indication value of high pressure (discharge) 0. IMpa3. Suction pressureCheck the indication value of low pressure (sueti on)0. 35 0. 6Mpa4.Suctionpressuredifference between each running compressorsCheck the indication value of low pressure

32、 (sucti on)w 0. 05Mpa5. Power supplyCheck with a voltmeterWith in %6. Outlet temperature of the cooli ng waterCheck the thermometer3040C7. Outlet temperature of the refrigerated waterCheck the thermometer510 C8. Vibrati on and no iseFeeli ng and liste ningNo abno rmal vibrati on and no ise9.Environm

33、en taitemperature(roomtemperature)Check the thermometerw 4CQuarterly1. Injection rate of the sec on dary refrigera ntCheck the flowing of the liquid in the sec on dary refrigera nt pipeli neNo air bubble2. Injection rate of the lubrica ntCheck the oil level gaugeWithin thespecificati onTable 2： Safe

34、ty devicesSafety deviceResultHigh pressure switch (High pressure protecti on)1. The cooling water is not circulating or the water level is too low.2. The outlet temperature of the cooling water is too high3. Scale formati on occurs to the conden ser4. The system has non-condensing gas in.Freez ingpo

35、int protector(Freeze protecti on)1. The temperature of the refrigerated water is too low.2. The set temperature is too low.Temperature switch (Exhaust temperature protectio n)1. The refrigerant amount is too low because of chiller leakage2. The sole noid valve for cooli ng pipeli ne of the compresso

36、r closes because of some fauIt.3. The outlet stop valve for the conden ser closesOverheat protect ion for the electromotor (Protection for the motor of the compressor)1. The same to the high pressure switch (High pressure protect ion).Low pressure switch (Low pressure protecti on)1. The expa nsion v

37、alve closes because of some fault2. The outlet stop valve for the conden ser closed3. The flow rate of the refrigerated water is in sufficie nt.4. Scale formati on occurs to the evaporatorPhase reversal protector1. The conn ecti on of power supply is in correctOvercurre nt relay1. The same to the hi

38、gh pressure switch (High pressure protect ion).Safety valve1. Overpressure occurs to the system of working medium.Recommended running rangeStan dard con diti onRunning range (for start ingup)Continu ous running rangein let temperature of cooling water ( C )301640Outlet temperature of refrigerated wa

39、ter ( C)7旷254、16Recommended maintenance periods1000 hours2500 hours5000 hours20000 hours40000 hoursRotor beari ng0ElectromotorLiquid injectio ncon trol valveSole noid valveSucti on filterOil filter0Liquidpipeli nefilter drier0Refrigerator oilNote： 0 Replace; CheckTroubleshooting for the Screw-type C

40、hillerSymptomPossible reas onRemoval methodThe discharge pressure is too high1) Air or some non-condensing gas exists in the system;1) Discharge out from the conden ser.2) The temperature of the cooling water is too high or the water flow through the conden ser is in sufficie nt.2) Adjust the water

41、valve or the gate valve for control: check the water tower and also the filter in the pipeli ne.3) The copper pipes in the conden ser are covered with scale, calc, and corrosi on, etc3) Clea n the copper pipes4) Pump fault4) Check the cooli ng water pump5) The refrigera nt is excessively filled, and

42、 the copper pipes of the conden ser immerge in the refrigera nt liquid5) Remove the excessive refrigera nt.6) The gas inlet valve of the conden ser has not bee n fully ope ned6) Fully ope n the valve7) The suet ion pressure is higher tha n the no rmal value7) Refer to The sucti on pressure is too hi

43、gh.The discharge pressure is too low.1) The water through the conden ser is too much, or the temperature of the water is too low.1) Adjust the water valve or the gate valve for control: check the water tower2) Oil bubbles appear because the liquid refrigerant has flowed into the compressor through t

44、he evaporator2) Check and adjust the expansion valve to ensure that the temperature sensor is tightly- fixed on the suction pipe and well in sulated from heat: the inlet temperature of the cooling water should be higher than the limited temperature.3) The outlet valve for the liquid of the conden se

45、r has leakage3) Check the running current of the chiller, and replace the outlet valve if n ecessary.4) The suction pressure is lower than the no rmal value4) Refer to The sucti on pressure is too low*.5) The refrigerant is insufficient and some gaseous refrigerant has been admitted into the liquid

46、pipeli ne.5) Fill into sufficie nt refrigera ntThesuet ionpressure is too high1) The discharge pressure is too high1) Refer to The discharge pressure is too high.2) The refrigera nt is excessively filled2) Discharge the excessive refrigera nt.3) Liquid refrigerant has flowed into the compressorthrou

47、ghtheevaporator3) Check and adjust the expansion valve to ensure that the temperature sensor is tightly- fixed on the suction pipe and well in sulated from heat: the inlet temperature of the cold water should be higher than the limited temperature4) The heat insulation of the cold water pipe is bad.

48、4) Check the heat insulation of the pipeli ne.Thesuet ionpressure is too low.1) The outlet valve for the refrigera nt liquid of the condenser has not been fully ope ned.1) Fully ope n the valve2) The liquid pipe or the suet ion pipe is blocked2) Check the filter for the refrigera nt3) The expa nsion

49、 valve has some fault or has bee n in correctly adjusted3) Correctly adjust the degree of superheat, and check if the temperature sen sor has any leakage4) The refrigerant in the system is in sufficie nt.4) Check if there is any leakage of the refrigera nt.5) Excessive lubrica nt is circulati ng in

50、the system.5) Check the lubrica nt amount6) The inlet temperature of the cold water is lower than the standard value6) Adjust the temperature set value7) The cold amount through the evaporator is in sufficie nt.7) Check the pressure loss of the cold water pipeli ne.8) The discharge pressure is too l

51、ow.8) Adjust the water gate valveThe compressor stops because of the break- off of high pressure1) The cooli ng water is in sufficie nt1) Check the water gate valve2) The conden ser is blocked; the water inlet gate valve is closed2) Check the copper pipes of the conden ser and also the gate valve3)

52、The set value for high pressure protecti on is in correct3) Check the set valueThe compressor stops because of overload of the motor1) The voltage is too high or too low1) Check if the voltage complies with the rated value, and bala nee the phase if n ecessar y.2) The discharge pressure is too high2

53、) Check the discharge pressure, find out the reas on and clear it.3) The temperature of the back water is too high.3) Find out the reas on and clear it.4) The overload element has some fault4) Check the compressor curre nt, and compare it with the full load curre nt in the data sheet.5) The motor or

54、 the conn ecti on has a short circuit5) Check the impedanee between the wiring seat of the motor and the gro und wireThe compressor stops because of the break- off ofthetemperature sensor in the motor1) The voltage is too high or too low.1) Check if the voltage complies with the rated value, and bal

55、a nee the phase if n ecessar y.2) The discharge pressure is too high2) Check the discharge pressure, find out the reas on and clear it.3) The temperature of the back water is too high.3) Find out the reas on and clear it4) The temperature sensor for the motor winding has some fault4) Check the eleme nt con tact point on the wiring seat of the temperature sensor for the compressor under the refrigerated con diti on (The compressor has been stopped for more than 10 minu tes)5) The refrigerant in the system is in sufficie nt.5) Check if