CIRCULATING AIR SOURCE HEAT PUMP WATER HEATER SERVICE MANUAL
T1/R410A/50Hz
(GC201510
–
ІІ
)
Страница 1: ...CIRCULATING AIR SOURCE HEAT PUMP WATER HEATER SERVICE MANUAL T1 R410A 50Hz GC201510 ІІ ...
Страница 2: ... INSULATION FOR PIPELINES OF WATER SYSTEM 19 6 ELECTRIC INSTALLATION 34 7 INSTALLATION OF COMMUNICATION SYSTEM 41 8 CHARGING OF REFRIGERANT 43 CHAPTER Ⅲ DEBUGGING AND OPERATION 46 1 DEBUGGING FLOW CHART 46 2 SAFETY NOTICES 46 3 PRE DEBUGGING PREPARATIONS 47 4 DEBUGGING OPERATION 50 5 UNIT FUNCTION SETTINGS 53 CHAPTER Ⅳ MAINTENANCE 56 1 ERROR CODE 56 2 TROUBLESHOOTING 59 3 MAINTENANCE OF KEY PARTS ...
Страница 3: ...roduction 1 Introduction of Unit 1 1 Product Overview GRS Cm28 NaA M GRS Cm28 NaA1 M GRS Cm36 NaA M GRS Cm36 NaA1 M 1 2 Operating Range of Unit Product operation range Item Outdoor ambient temperature Operation range for generating hot water 26 46 GRS Cm53 NaA M GRS Cm53 NaA1 M ...
Страница 4: ...essed to be high temperature and high pressure gas and then it enters into heat exchanger of water side to conduct heat exchange with water through which the refrigerant becomes liquid and then the liquid refrigerant enters into the heat exchanger of air side via depressurization and cooling of electronic expanding valve it will conduct heat exchange with the ambient air inside the heat exchanger ...
Страница 5: ... evaporator When the refrigerant enters into evaporator and conducts heat exchange with air the heat exchanger of evaporator will absorb the energy from air for the unit 6 Fan Enhance the heat exchange of evaporator 7 Defrosting temperature sensor For defrosting inspection 8 Electronic expanding valve On the one hand is for throttle and depressurization of high pressure liquid refrigerant ensuring...
Страница 6: ...ater side Shell and tube heat exchanger Fan Type Low noise axial flow fan Air discharge type Top air discharge Airflow ambient temperature 25 m 3 h 11400 11400 12400 Water system Circulating Water Flow m 3 h 4 8 6 2 9 2 Water pressure kPa 70 130 70 Maximum bearing pressure MPa 0 8 0 8 0 8 Diameter of air inlet pipe and air outlet pipe in G 1 1 4 G 1 1 4 G 2 Outline dimension W D H mm 930 800 1605 ...
Страница 7: ...ed for this product and limit the maximum water tank temperature for stop operation The curve is as below Curve of maximum water tank temperature for stop operation with the change of ambient temperature Ambient temperature Tank temperature Ambient temperature Tank temperature Ambient temperature Tank temperature 26 53 1 58 24 60 25 53 0 58 25 60 24 53 1 58 26 59 23 53 2 58 27 59 22 53 3 59 28 58 ...
Страница 8: ...onnect water tank and outdoor unit Connect power cord and communication wire Debugging of unit Completion work chart Deliver operating instruction manual 2 Preparation Before Installation 2 1 Matters Need Attention During Installation 2 1 1 Safety requirements for installation and construction Warning Before construction all the constructors must have had the safety education and have passed the s...
Страница 9: ...e operation of unit 5 Bad heat insulating condition of pipelines or there is no heat insulation for pipelines There will be great loss of heat the water temperature cannot satisfy the using demand 6 Water pressure of tap water is not great enough or water pressure of tap water is too high that there is no corresponding remedial measure The unit cannot operate normally which may cause complaint of ...
Страница 10: ...aft Installation personnel should carefully read the designing plan and draft provided by designer and conduct verification and examination according to on site conditions and propose reasonable revised suggestion in time Confirmation sheet of construction design draft for examination and verification No Contents for Confirmation Result 1 Check if the installation position of unit has satisfied th...
Страница 11: ...aterials must comply with the local eco friendly requirements and should provide related certificates 2 3 2 Requirements for selecting Installation Materials It is suggested to use PPR pipe as the hot water system pipelines PPR pipes can be easily installed and connected the material and fittings can be expediently purchased it will not produce welding slag or other waste materials during the inst...
Страница 12: ...ers The power cord must use copper conductor that should comply with related local conductor standard and satisfy current carrying capacity requirement of unit For specific selection of wire diameter please refer to the contents of Chapter Six 3 Installation for Main Unit of Water Heater 3 1 External Dimensions and Size of Installation Holes 1 External dimensions and size of installation holes for...
Страница 13: ...gases 3 The unit should not be installed in the place with corrosive gas severe dust or salt mist etc 4 The unit should be installed in the place where has good ventilation and has adequate space for air inlet and maintenance there should be no obstacles in the air inlet or outlet for good ventilation of air 5 The unit should be installed in the place where is convenient for installing connecting ...
Страница 14: ...cmultiple installation 3 4 Manufacture of Installation Base The concrete base in the installing place of outdoor unit should have enough strength and the drainage should be in good condition that should not influence the drainage of floor or the drainage of the downstairs ...
Страница 15: ... ditch should be made around the base so as to drain the condensate water in the installing place of unit 7 When installing the unit on the roof users should check the strength of building and take a waterproof measure 8 If the base is made of U steel structure the design structure should have enough rigidity and intensity 3 5 Shakeproof Requirement Before installing the water heater it is suggest...
Страница 16: ...he hot water demand of building under the worst working condition 3 Determine the model and quantity of unit according to the area of installing place bearing weight and other factors 4 2 Installation Principal Sketch Map 4 2 1 Introduction for functions of parts and components 1 Major functions for parts and components of system ...
Страница 17: ...t is provided by project and is connected to the unit 12 Water tank temperature sensor Detect the water temperature inside the water tank It is connected to the unit the unit is equipped with water tank temperature sensor 13 Water auto booster pump When the water supply pressure of water using side is insufficient the water auto booster pump can boost the pressure The water pump can be automatical...
Страница 18: ...ter pipe of the system must have heat insulation protection to prevent loss of heat and frost crack of pipe in winter 4 When the ambient temperature in winter is too low or the unit will not be started for long 24 hours energize the unit first for not less than 8 hours before starting up the unit 5 When the outdoor temperature is relatively low in winter do not cut off the power source after the u...
Страница 19: ...he water quality is bad then it should install an electronic hydrotreater to ensure the good water quality Circulating heat insulation when the temperature detected by the temperature sensor of water tank is lower than the set temperature circulating heat insulation function is started up Back water control when the water system of user side has not been used for long the water temperature in wate...
Страница 20: ... with the main unit After installing when the main unit is steadily operated 6 minutes later after started up the unit manually adjust the cut off valve to adjust the water output temperature of auxiliary electric heater The unit needs to have heat insulation protection for preventing heat loss of hot water pipelines When the ambient temperature is below 0 in winter all the water pipelines and val...
Страница 21: ... valid volume of water tank is the volume between the user water getting outlet and the high water level 4 3 2 Notices for installing water tank 1 After the water tank is filled with water its weight will be great it must be placed in the ground or floor than can sustain the weight 2 The water tank must be installed in the base with reliable fixation 3 If the water tank is installed outdoors it sh...
Страница 22: ...32 32 3 2 9 3 6 4 4 5 4 6 5 40 40 40 4 3 7 4 5 5 5 6 7 8 1 50 50 50 5 4 6 5 6 6 9 8 3 10 1 63 63 63 6 5 8 7 1 8 6 10 5 12 7 75 75 75 7 6 8 8 4 10 3 12 5 15 1 90 90 90 9 8 2 10 1 12 3 15 0 18 1 110 110 111 0 10 0 12 3 15 1 18 3 22 1 Notes The length of pipe is generally 4m or 6m it also can be defined according to the user s requirement The length of pipe should be no minus deviation Wall thickness...
Страница 23: ...ipper or pipe cutter or hacksaw to cut the pipes after cutting the pipes the rough selvedge of cross section should be removed 3 Connection end face of pipes and parts should be clean dry and no oil 4 Use calipers and pen to measure and mark the socket depth of pipe end the socket depth should not be less than the requirements in the following sheet 5 Heating time processing time and cooling time ...
Страница 24: ...r under direct sunlight keep them away from fire or heat source 12 Pipes should be horizontally piled in clean place The parts should be piled by layers with the height be not over 1 5m 13 Do not use any damaged pipes or parts 14 The mouths of pipe during installation of pipe system should be sealed or blocked in time If there is damage the pipes should be replaced in time 15 During installation t...
Страница 25: ... and walls should have conducted pressure test before sealing the gap 21 When installing the pipes there should set support or hanger frame according to different pipe diameters and requirements The position should be accurate the covering and mounting should be flat and firm 22 The pipe clip should firmly fix the pipe but it should not damage the surface of pipe It is suggested to use plastic bel...
Страница 26: ...t of pipe should satisfy the following requirements a Pressure test should be conducted only after the pipe has been installed and the outward appearance is checked to be passed b For the pipes are connected by welding water pressure test should be conducted 24 hours after the connection is done c Pressure test medium is clear water under normal temperature If the pipe system is large the test can...
Страница 27: ...d not be installed in the hot water outlet pipe installation size of water flow switch is G1 2 Usually water flow switch contains detachable paddles that are 45mm 65mm 75mm or 85mm s long and 16mm s wide The paddle can be trimmed conditionally during installation Please make sure the rear part forms an arc that matches the pipe and the bottom of the paddle should be 10 20 above the pipe central li...
Страница 28: ...lectrode Type Water Level Switch Gree commercial water heater adopts 4 level water level switch and one level water level switch 4 level water level switch is applied in heating water tank and one level water level switch is applied in heat accumulating water tank If the system is not installed with heat accumulating water tank one level water level switch is not needed 5 3 1 1 4 level Water Level...
Страница 29: ...n button 3 Error indicator 11 Confirm button 4 Up button 12 Functional button 4 5 Right button 13 Functional button 3 6 Menu button 14 Functional button 2 7 Down button 15 Functional button 1 8 Left button Main menu interface 1 2 Setting of Water Level When the wired controller is in the main interface press Functional button 3 to enter user parameters setting interface as shown in the figure ...
Страница 30: ...tting will be valid after saving setting Sheet 2 Water Level Modes Water level mode High water level Medium water level Water yield 01 4 electrode 3 electrode 100 02 4 electrode 2 electrode 03 4 electrode 1 electrode 04 3 electrode 2 electrode 75 05 3 electrode 1 electrode 06 2 electrode 1 electrode 50 3 Detecting Electrode Detecting electrode has 4 pieces of signal wire They are red white wire of...
Страница 31: ... the same wire tube Prohibit using the detecting electrode of other brands Otherwise it will affect the normal operation of controller It is suggested to clean the detecting electrode every three months in order to remove the scale on its surface The cleaning period can be shortened or prolonged according to the scale accumulating status in order to avoid affecting the detection of water level 3 I...
Страница 32: ...vel switch wire is connected 2 Take the electrode out from the water tank Wipe each electrode metal head to remove the impurities on the surface and then put it back to the water to see if the error is eliminated If the error is eliminated please pay attention to the routine maintenance of electrode and clean the electrode once a month 3 If the error still exists when the above operation is done p...
Страница 33: ...er Detection board Detecting electrode totally 4 piece in the color of red brown black and yellow Wiring box The wiring inside the wiring box has been done Please refer to the following diagram if you want to check Then close the cover of wiring box and tighten the screws Put the wiring box on the grille of unit and then fix it with U type bolt shown as below ...
Страница 34: ...the water level switch vertically and make sure the wire outlet hole is lower Do not install the water level switch box in the humid environment to avoid detection failure During installation and operation the connector of water level switch wire shall not be dipped into the water and shall not be hung inside the water tank to avoid failure During installation the distance between electrode top of...
Страница 35: ...eration of float Otherwise unit malfunction during operation will be caused and damage the unit Hot water inlet and backwater inlet at user s side can t face water level switch in order to prevent inlet water flow from striking water level float and causing malfunction of water level switch 5 4 Heat Insulation Measures 1 Earth covering depth for the embedded leading pipes of construction should no...
Страница 36: ...frigerant leakage electric shock fire hazard and other accidents 2 Heat pump water heater belongs to I class electric appliance users must ensure that the water heater is grounded reliably otherwise it may cause electric shock The earth connection should not be connected to the wires of gas pipe water supply pipe lightning rod or telephone line 3 After installing the unit user should energize the ...
Страница 37: ...the power cord from being abraded by sheet metal 5 There should be reliable fixture for the power cord to prevent the connecting terminal from being stressed 6 2 2 Selection for diameter of power cord and air switch Configuration Table of Power Source Model Type of Power Source Minimum Sectional Area of Power Cord mm 2 Capacity of Air Switch Phase Line Zero Line Earth Wire A GRS Cm28 NaA M GRS Cm2...
Страница 38: ...s a tap water pipe b gas pipe c blow off pipe d unreliable places Safety notices for using water Please use PPR plastic pipe to connect to direct hot water inlet circulating water inlet and water outlet respectively and then connect to the exterior water pipe If the plastic pipe is self prepared by the user then the length of plastic pipe should not be less than the following length L 70 R2 L is t...
Страница 39: ...allation 6 Electric Installation 37 6 2 3 External wiring diagram of unit 6 2 4 External wiring diagram of modularized unit CN15 CN25 CN15 CN25 CN25 CN15 Wired controller 1 unit 2 unit 3 unit CN2 CN1 inspection board ...
Страница 40: ...Chapter Ⅱ Installation 6 Electric Installation 38 6 3 Circuit Diagram 1 Diagram of GRS Cm28 NaA M 2 Circuit diagram of GRS Cm28 NaA1 M ...
Страница 41: ...Chapter Ⅱ Installation 6 Electric Installation 39 3 Circuit diagram of GRS Cm36 NaA M 4 Circuit diagram of GRS Cm36 NaA1 M ...
Страница 42: ...ctric Installation 40 5 Circuit diagram of GRS Cm53 NaA M 6 Circuit diagram of GRS Cm53 NaA1 M Notes The above diagrams are only for reference specific information should be subject to the circuit diagram stuck on the actual unit ...
Страница 43: ... single unit and can control multiple units as well The wired controller has BMS interface that can connect to computer through RS232 transferring to RS485 convertor so as to realize remote control 7 1 Connection for Terminals of Communication Wire Sketch Map for Connection of Mainboard Communication Wire Sketch Map for Connection of Liquid Level Switch Keysets Communication Wire ...
Страница 44: ...controller communication wire When it needs to connect to PC it can connect from the BMS interface 7 2 Connecting Method for Communication Network It is applicable to GRS Cm28 NaA M GRS Cm28 NaA1 M GRS Cm36 NaA M GRS Cm36 NaA1 M GRS Cm53 NaA M GRS Cm53 NaA1 M 7 2 1 Connecting method for single module ...
Страница 45: ... system and then put it into water tank to detect 8 2 Vacuum Pumping Vacuum pumping must be conducted with vacuum pump Operating procedures are as follows 1 Screw off the nut cap for charging Freon of air intake duct 2 Connect the low pressure soft tube of vacuometer to the joint of Freon charging spout 3 Connect intermediate tube of vacuometer to pressureproof soft tube another end of soft tube i...
Страница 46: ...valve of refrigerant tank and then open the valve beside the low pressure gauge of refrigerant meter to discharge for 5 seconds screw down the joint of soft tube of refrigerant meter on the three way valve As shown below 2 Wait for three minutes after the main unit is started up if the needle pointer of low pressure gauge rises slowly twist off the valve beside the low pressure gauge and conduct r...
Страница 47: ... are set according to requirement Pass Below grade 5 Check if the pipes have been conducted gas proofness test Pass Below grade 4 Heat Insulation 1 Check if the heat insulating thickness is consistent with the requirement Pass Below grade 2 Check if the heat insulation work of water pipes are in good condition Pass Below grade 3 Check if the level of combustion for heat insulation material is cons...
Страница 48: ... comply with construction security specifications Security measures must be taken especially for outdoor operations Special type operators involved in the engineering implementation such as welders electricians and refrigeration mechanics must have relevant operating licenses and are accredited with vocational qualification certification The equipment must be powered off before relevant operations...
Страница 49: ...pressure gauges for corresponding refrigerants 3 2 Required Files for Debugging Debugging data record table Engineering project name Unit model Debugging personnel Debugging date Rated capacity of outdoor unit kW Capacity of water tank Max difference between ODU and water tank m Lift of pump Debugging status water heating Status parameters Unit Before turning on the unit 60min ODU status parameter...
Страница 50: ...location has the engineering diagrams for electrical and control etc Is the phase sequence of main power supply correct Water tank 1 The installation location shall be strong enough to withstand the weight of water tank 2 The drainage port of water tank shall be near the discharge ditch or discharge outlet 3 If the pressure meter pressure relief valve auto discharge valve etc are installed properl...
Страница 51: ...e connected properly If the wires are connected properly according to wiring diagram If the unit is grounded sufficiently If all wiring terminals are connected reliably 4 Is the phase sequence of main power supply correct If not please correct phase sequence according to the instruction manual 5 Check the insulation resistance of each phase to ground and between each phase with universal meter 3 3...
Страница 52: ...ange connection pipe distance high difference between IDU and ODU power supply voltage and installation space When debugging operation and everything are properly please instruct the operation and maintenance methods to the user according to the instruction manual Meanwhile please hand over this notices and instruction manual to the user and ask the user to keep them properly 4 2 Basic Introductio...
Страница 53: ...rains out Circulating pump drains out and circulating pipe drains out Check the idling direction of pump Open the flexible connection of unit Open the circulating valve Drain the water pipe Screw up the flexible connection of unit End Reverse the power cord of pump Activate the AC contactor of cold water lifting pump to make it close When the pump is idling release the contactor to check if the im...
Страница 54: ...tdoor ambient temperature Power supply voltage V Suction temperature Discharge temperature Water tank parameters Temperature of water outlet pipe temperature sensor Temperature of water tank temperature sensor Debugging conclusion 4 5 Unit Normal Operation Parameters Judgment Reference Debugging Detection During operation as the difference between water temperature and ambient temperature the suct...
Страница 55: ...ture is 15 water outlet temperature is set in 50 Outdoor ambient temperature Power supply voltage V Compressor current A Discharge temperature Suction temperature Water outlet temperature Debugging conclusion 5 Unit Function Settings Note This instruction is only applicable for the main board of water heater Please ask professional person the operate the DIP Cut off the power before operating the ...
Страница 56: ...ation In module system you must appoint one unit as the 1 unit and the other units are 2 3 16 in turn Because all the units are the same you can appointed the most convenient unit in the project as the 1 unit Address DIP of unit black part is the deflector rod DIP Position Address Instruction SA3 1 2 3 4 ON ON ON ON 1 ON pull the deflector rod to the direction of ON the opposite direction is OFF O...
Страница 57: ...Chapter Ⅲ Debugging and Operation 5 Unit Function Settings 55 Address DIP diagram ...
Страница 58: ...arge temperature sensor The discharge temperature sensor is used to prevent unit failure or damage arising from compressor oil decomposition and carbonization when system is operating in an abnormal status and discharge temperature is too high If the discharge temperature is higher than the set value 130 of discharge temperature protection or the discharge temperature sensor is disconnected the co...
Страница 59: ...from compressor oil decomposition and carbonization when system is operating in an abnormal status and discharge temperature is too high When open circuit or short circuit occurs to the discharge temperature sensor unit will display the error code and the corresponding load is shut down After system is recovered automatically unit restores operation F5 Outdoor inlet pipe temperature sensor error O...
Страница 60: ...the error code is displayed and all the loads are shut down After system is recovered automatically unit restores operation d3 Error on sensor of anti freezing for shell and tube Sensor of anti freezing for shell and tube Sensor of anti freezing for shell and tube is used for detecting the temperature shell and tube When the sensor occurs error the unit operates normally and error code is displaye...
Страница 61: ...ve and adjust unit s inlet pipe Check if the water flow is sufficient The engineering component fails Check the hydraulic device and clean the filter Yes Check and repair the electromagnetic water valve electronic hot water valve and bushing If the low pressure is rather low Heat exchanger has scale Please clean the unit No Check if the expansion valve can operate normally Replace the expansion va...
Страница 62: ...f the pressure switch is damaged Yes Replace the pressure switch Wire connection error or line interference check and replace the line No Fill refrigerant according to the filling amount indicated on the nameplate Yes Check if the expansion valve can operate normally Replace the coil of expansion valve or the valve No Check if the temperature difference or pressure difference before and after the ...
Страница 63: ...ter or another component is too large The system pipeline leaks Repair the leakage hole and add refrigerant according to the original quantity No The system is blocked up Replace the related component Yes Yes Yes 2 1 4 Water level switch error of the unit Water level switch error Yes The switch signal cable falls off No Disconnect power reconnect the cable and then turn power on Check which float ...
Страница 64: ...iece angle and size The butt piece is broken Replace the butt piece Replace the water flow switch Yes Yes Yes Yes No No No 2 1 6 Communication error Communication error Check if the communication cord is connected correctly Confirm the positions of the connector and socket Replace the communication cord Yes Yes No Measure if the communication cord can be passed through Confirm the positions of the...
Страница 65: ...is powered on If condition permits use a multimeter to test whether each power module can operate normally Alternatively you can just check whether the digital tube of the main board is displayed normally Normally the 2 digit digital tube should display 00 or an error code You can also check whether the communication indicator is lighted up After making sure that main board is powered on check whe...
Страница 66: ...Check the fuse which you can locate as the figure below Replace the fuse if it failed If nothing wrong with the power supply check whether the double 8 digital displayer on the main board is displayed normally Normally the 2 digit digital tube should display 00 or an error code You can also check whether the communication indicator is flashing It could be malfunction of the main board if the doubl...
Страница 67: ...igerant The water system is blocked or there s air inside the water system Please check water pump valve and pipeline clean the strainer or discharge air Adjust the load or add energy storage device Compressor operates while the unit can t heat A Refrigerant is leaked B Malfunction of compressor Repair it and complement refrigerant Replace compressor The hot water generation effect is not obvious ...
Страница 68: ...rom taking in liquid refrigerant and therefore prevent liquid impact The gas liquid separator is located at the suction port of the compressor Tube in tube heat exchanger The high pressure and high temperature gas discharged from the compressor releases heat inside the tube in tube heat exchanger and heat up the water Electronic expansion valve Firstly it throttles and reduces pressure of the high...
Страница 69: ...s flow again Water flow switch It is used to control the water flow in the water system and prevent frequent abnormality protection of the unit due to large poor flow 3 2 Removal Installation of Key Parts 3 2 1 Removal Installation of GRS Cm28 NaA M GRS Cm28 NaA1 M main unit 3 2 1 1 Compressor Removal Installation of the compressor Remarks Before removing the compressor make sure there is no refri...
Страница 70: ...ompressor s rubber grommet The replaced compressor should be well sealed to prevent water from getting in Place the newly replaced compressor onto the rubber grommets Wear steel bushing on the center of the grommet Tighten up the nuts to the position of steel bushing 5 Connect the suction port and discharge port of compressor to the system pipeline Connect power cord and check whether the compress...
Страница 71: ...nt properly Prepare related devices and tools Make sure power is off Step Figure Operation Instructions 1 Reclaim the refrigerant and then remove the gas liquid separator Take off the nuts and bolts on the base plate Reclaim the refrigerant Disassemble the connection pipes by welding Use spanner or other tools to take off the fixing nuts and bolts Remove the gas liquid separator 2 Clean the system...
Страница 72: ...ments on unit s nameplate 3 2 1 3 Tube in tube heat exchanger Removal Installation of tube in tube condenser Remarks Check the refrigerant system and each circuit After making sure that it is necessary to replace the tube in tube condenser disconnect power and reclaim the refrigerant Step Figure Operation Instructions 1 Reclaim the refrigerant and remove the fluorine connection pipe and waterway c...
Страница 73: ...e fixing nuts of tube in tube condenser Weld the fluorine connection pipe and tighten the waterway conenction pipe 4 Reclam system pressure vacuumize and recharge refrigerant Detect system leakage Make sure the vacuum degree reaches 1 0bar Type and amount of refrigerant should accord with requirements on unit s nameplate 3 2 1 4 Electronic expansion valve Removal Installation of electronic expansi...
Страница 74: ...e soldering gun 3 Replace with a new electronic expansion valve Replace with a new EXV that is of the same model Wrap the EXV with wet cloth and mount it on Connect the connection pipe Weld it with soldering gun Note Add nitrogen into the pipe when welding 4 Retain system pressure vacuumize and recharge refrigerant Detect system leakage Make sure the vacuum degree reaches 1 0bar Type and amount of...
Страница 75: ...cloth before welding Remove the 4 way valve by welding 2 Clean the system accordingly Replace the 4 way valve with the same model Pipe connection should also be consistent with the original connection of 4 way valve In principle model of the new valve should be the same as the replaced one In special cases where same model cannot be guaranteed please ask professional technicians for confirmation W...
Страница 76: ... Remove the electronic expansion valve In order to protect the EXV wrap it with wet cloth during welding Remove the EXV by using the soldering gun 3 Replace with a new electronic expansion valve Replace with a new EXV that is of the same model Wrap the EXV with wet cloth and mount it on Connect the connection pipe Weld it with soldering gun Note Add nitrogen into the pipe when welding 4 Retain sys...
Страница 77: ...nt 2 Remove the strainer In order to protect the EXV wrap it with wet cloth during welding Remove the filter by using the soldering gun 3 Replace with a new filter Replace with a new filter that is of the same model Wrap the EXV with wet cloth and mount teh filter on Connect the connection pipe Weld it with soldering gun Note Add nitrogen into the pipe when welding 4 Retain system pressure vacuumi...
Страница 78: ...move unit s electric box middle beam and the power cord of compressor Reclaim the refrigerant Use screw wrench or other tools to remove the electric box and middle beam Reclaim the refrigerant 3 Disconnect compressore from its connection pipe by welding Screw off the fixing nuts of compressor and remove the compressor When using a soldering gun weld the pipes quickly to prevent pipeline from overb...
Страница 79: ...diagram Power on the unit and energize the AC contactor of the compressor manually to turn compressor on for 2 3 sec If compressor is reversed ear piercing noise will occur 6 Retain system pressure vacuumize and recharge refrigerant in After confirming it s OK install the front panel Detect system leakage Make sure the vacuum degree reaches 1 0bar Type and amount of refrigerant should accord with ...
Страница 80: ... connection pipes by welding 2 Take off the bolts on the base plate of gas liquid separator Take off the fixing bolts by using a spanner or other tools Remove the gas liquid separator 3 Assemble and weld the connection pipes of gas liquid separator Add nitrogen during welding for protection Install the new gas liquid separator according to the original direction Match the pipes correspondingly Use...
