Midea R410A Domestic Pools & Spas Heat Pump Water Heater 50Hz A1 Series Technical Manual

Transcription

1 Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual MCAC-HTSM Midea R410A Domestic Pools & Spas Heat Pump Water Heater 50Hz A1 Series Technical Manual Applicable Model: (New CE safety directive) LRSJ-60/NYN1-A1 LRSJ-80/NYN1-A1 LRSJ-120/NYN1-A1 LRSJ-140/NYN1-A1 Midea reserves the right to discontinue, or change specification or designs at any time without notices and without incurring obligations. 1

2 MCAC-HTSM Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual Content Part. 1 General information... 3 Part. 2 Performance... 5 Part. 3 Installation

3 Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual MCAC-HTSM Part. 1 General information 1. Model Names of Units External Appearance Nomenclature

4 MCAC-HTSM Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual 1. Model Names of Units Domestic pools & spas HPWH Model LRSJ-60/NYN1-A1 LRSJ-80/NYN1-A1 LRSJ-120/NYN1-A1 LRSJ-140/NYN1-A1 Power supply V~, 1Ph, 50Hz V~, 1Ph, 50Hz V~, 1Ph, 50Hz V~, 1Ph, 50Hz 2. External Appearance LRSJ-60/NYN1-A1 LRSJ-80/NYN1-A1 LRSJ-120/NYN1-A1 LRSJ-140/NYN1-A1 3. Nomenclature LRSJ - 60 / N Y N1 A1 A1 series Refrigerant type - N1: R410A Swimming pool & spas type Water cycle type without water pump Nominal heating capacity (60 100W) Midea heat pump water heater with cooling 4

5 Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual MCAC-HTSM Part. 2 Performance 1. Features Specifications Dimensions (Unit: mm) Service Space Refrigerant circuit Wiring Diagrams Electric Characteristics Capacity Curve Accessories

6 MCAC-HTSM Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual 1. Features Titanium heat-exchanger Titanium heat-exchanger has highly resistant to corrosion. High strength and durability, pressure test at water side (0.5MPa, water temperature 45 C, 60,000 times). No need secondary heat-exchanger, reduce the cost of installation. Because of titanium heat-exchanger of anti-corrosion, the water system of HPWH can be directly connected with poor. Without secondary heat-exchanger, it is can improve the efficiency of whole system. Easy operation and automatic control, the system can be controlled simply through the wired controller with LCD display which is installed in the unit. Environment friendly refrigerant R410A is used. No discharge of poisonous gas. No pollution to atmosphere and environment. Automatic start-up and shutdown, automatic defrosting. Save much extra operation. Within temperature range from -7 C to 38 C, it will not be affected by night, overcast sky, rain and snow. Multi-temperature sensors always monitor the unit operating status. 6

7 Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual MCAC-HTSM Specifications Model LRSJ-60/NYN1-A1 LRSJ-80/NYN1-A1 Power supply \ V~, 1Ph, 50Hz V~, 1Ph, 50Hz Outlet water Heating mode \ Default 28 C, 20 C~35 C Default 28 C, 20 C~35 C temperature Cooling mode \ Default 28 C, 10 C~30 C Default 28 C, 10 C~30 C Ambient Heating mode \ -7 C~38 C -7 C~38 C temperature Cooling mode \ 15 C~43 C 15 C~43 C Capacity kw Water heating Input kw COP W/W Capacity kw Water cooling Input kw COP W/W Rated power input W Noise level db(a) Refrigerant Type/Discharged \ R410A /1.00kg R410A /1.25kg Refrigerant control \ Capillary Capillary Type \ Axial fan Axial fan Motor model \ YDK85-6 YDK85-6 Motor brand \ Welling Welling Fan Quantity \ 1 1 Motor input kw 160/85 160/85 Capacitor \ 5μF/450V 5μF/450V Speed (Hi/lo) r/min 835/ /470 Type \ Copper tube and aluminum fin Tube size mm Ф7.94 Ф7.94 No. of rows \ 2 2 Coil Fin spacing mm Tube pitch(a) row pitch(b) mm Length height mm Number of circuits \ 5 5 Model \ PA145G1C-4FT1 PA200X2CS-4KU1 Type/ Quantity \ Rotary / 1 Rotary / 1 Brand \ GMCC GMCC Capacity kw Compressor Input W 1,240 1,670 Capacitor \ 35μF/ V 50μF/ V Rated current (RLA) A Locked rotor Amp.(LRA) A Thermal protector \ Internal Internal Refrigerant oil ml

8 MCAC-HTSM Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual Continues Model LRSJ-60/NYN1-A1 LRSJ-80/NYN1-A1 Inlet pipe mm Ф50 Ф50 Water pipe Outlet pipe mm Ф50 Ф50 Drainage pipe mm Ф25 Ф25 Max/Min resisting pressure \ 0.15MPa/0.4MPa 0.15MPa/0.4MPa Hot water Min. volume flow m 3 /h yield Max. volume flow m 3 /h Dimension (W H D) mm 1, , Packing (W H D) mm 1, , Net/Gross weight kg 58.5/ /75 Notes: The test conditions: Water heating: outdoor temperature 24/19ºC (DB/WB), inlet water temperature 27ºC, outlet water temperature 29ºC. Water cooling: outdoor temperature 35/24ºC (DB/WB), inlet water temperature 27ºC. Water flow volume has been defined. Model LRSJ-120/NYN1-A1 LRSJ-140/NYN1-A1 Power supply \ V~, 1Ph, 50Hz V~, 1Ph, 50Hz Outlet water Heating mode \ Default 28 C, 20 C~35 C Default 28 C, 20 C~35 C temperature Cooling mode \ Default 28 C, 10 C~30 C Default 28 C, 10 C~30 C Ambient Heating mode \ -7 C~38 C -7 C~38 C temperature Cooling mode \ 15 C~43 C 15 C~43 C Capacity kw Water heating Input kw COP W/W Capacity kw Water cooling Input kw COP W/W Rated power input W Noise level db(a) Refrigerant Type/Discharged \ R410A /1.60kg R410A /1.85kg Refrigerant control \ Capillary Capillary Type \ Axial fan Axial fan Motor model \ YDK76-6H-1 YDK76-6H-1 Motor brand \ Welling Welling Fan Quantity \ 1 1 Motor input W 168/ /146 Capacitor \ 5μF/450V 5μF/450V Speed (Hi/lo) r/min 877/ /749 8

9 Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual MCAC-HTSM Continues Model LRSJ-120/NYN1-A1 LRSJ-140/NYN1-A1 Type \ Copper tube and aluminum fin Tube size mm Ф7.94 Ф7.94 No. of rows \ 2 2 Coil Fin spacing mm Tube pitch(a) row pitch(b) mm Length height mm Number of circuits \ 8 8 Model \ PA290X3CS-4MU1 PA330X3CS-4MU1 Type/ Quantity \ Rotary / 1 Rotary / 1 Brand \ GMCC GMCC Capacity kw Compressor Input W 2,430 2,760 Capacitor \ 50μF/ V 55μF/ V Rated current (RLA) A Locked rotor Amp.(LRA) A Thermal protector \ Internal Internal Refrigerant oil ml 950 1,100 Inlet pipe mm Φ50 Φ50 Water pipe Outlet pipe mm Φ50 Φ50 Water circulation pipe mm Φ25 Φ25 Max/Min resisting pressure \ 0.15/ /0.4 Hot water yield Min. volume flow m 3 /h Max. volume flow m 3 /h Dimension (W H D) mm 1, , Packing (W H D) mm 1, , Net/Gross weight kg 75/85 75/85 Notes: The test conditions: Water heating: outdoor temperature 24/19ºC (DB/WB), inlet water temperature 27ºC, outlet water temperature 29ºC. Water cooling: outdoor temperature 35/24ºC (DB/WB), inlet water temperature 27ºC. Water flow volume has been defined. 9

10 MCAC-HTSM Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual 3. Dimensions (Unit: mm) Top view Unit: mm Model A B C D E F LRSJ-60/NYN1-A , LRSJ-80/NYN1-A , LRSJ-120/NYN1-A , LRSJ-140/NYN1-A ,

11 Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual MCAC-HTSM Service Space 11

12 MCAC-HTSM Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual 5. Refrigerant circuit 12

13 Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual MCAC-HTSM Wiring Diagrams LRSJ-60/NYN1-A1, LRSJ-80/NYN1-A1 13

14 MCAC-HTSM Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual LRSJ-120/NYN1-A1, LRSJ-140/NYN1-A1 14

15 Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual MCAC-HTSM LRSJ-60/NYN1-A1, LRSJ-80/NYN1-A1 LRSJ-120/NYN1-A1, LRSJ-140/NYN1-A1 Item Detail N.C. Tout T3 T4 T6 Tp Pro_H Pro_L Pro-Hyd.O No need connect. Outlet water temperature sensor. Heat-exchanger temperature sensor. Outdoor ambient temperature sensor. Inlet water temperature sensor. Temperature sensor of compressor discharge. High-pressure switch. Low-pressure switch (Reserved). Water flow switch. 15

16 MCAC-HTSM Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual 7. Electric Characteristics Model LRSJ-60/NYN1-A1 LRSJ-80/NYN1-A1 Hz Outdoor unit Voltage V, 1Ph V, 1Ph Min. 198V 198V Max. 254V 254V MCA Power supply TOCA MFA Compressor MSC RLA OFM kw FLA Note: MCA: Min. Current Amps. (A) MFA: Max. Fuse Amps. (A) TOCA: Total Over-current Amps. (A) MSC: Max. Starting Amps. (A) RLA: Rated Locked Amps. (A) OFM: Outdoor Fan Motor kw: Fan Motor Rated Output (kw) FLA: Full Load Amps. (A) Model LRSJ-120/NYN1-A1 LRSJ-140/NYN1-A1 Hz Outdoor unit Voltage V, 1Ph V, 1Ph Min. 198V 198V Max. 254V 254V MCA Power supply TOCA MFA Compressor MSC RLA OFM kw FLA Note: MCA: Min. Current Amps. (A) MFA: Max. Fuse Amps. (A) TOCA: Total Over-current Amps. (A) MSC: Max. Starting Amps. (A) RLA: Rated Locked Amps. (A) OFM: Outdoor Fan Motor kw: Fan Motor Rated Output (kw) FLA: Full Load Amps. (A) 16

17 Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual MCAC-HTSM Capacity Curve LRSJ-60/NYN1-A1 Heating mode: Test condition, inlet water temperature of the units is 27 C ; outlet water temperature is 29 C. Relation between heating capacity and outdoor ambient temperature: Relation between COP and outdoor ambient temperature: 17

18 MCAC-HTSM Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual Cooling mode: Test condition, inlet water temperature of the units is 27 C ; water volume is 2.6m 3 /h. Relation between cooling capacity and outdoor ambient temperature: Relation between EER and outdoor ambient temperature: 18

19 Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual MCAC-HTSM LRSJ-80/NYN1-A1 Test condition, inlet water temperature of the units is 27 C ; outlet water temperature is 29 C. Relation between heating capacity and outdoor ambient temperature: Relation between COP and outdoor ambient temperature: 19

20 MCAC-HTSM Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual Cooling mode: Test condition, inlet water temperature of the units is 27 C ; water volume is 3.5m 3 /h. Relation between cooling capacity and outdoor ambient temperature: Relation between EER and outdoor ambient temperature: 20

21 Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual MCAC-HTSM LRSJ-120/NYN1-A1 Test condition, inlet water temperature of the units is 27 C ; outlet water temperature is 29 C. Relation between heating capacity and outdoor ambient temperature: Relation between COP and outdoor ambient temperature: 21

22 MCAC-HTSM Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual Cooling mode: Test condition, inlet water temperature of the units is 27 C ; water volume is 5.0m 3 /h. Relation between cooling capacity and outdoor ambient temperature: Relation between EER and outdoor ambient temperature: 22

23 Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual MCAC-HTSM LRSJ-140/NYN1-A1 Test condition, inlet water temperature of the units is 27 C ; outlet water temperature is 29 C. Relation between heating capacity and outdoor ambient temperature: Relation between COP and outdoor ambient temperature: 23

24 MCAC-HTSM Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual Cooling mode: Test condition, inlet water temperature of the units is 27 C ; water volume is 5.8m 3 /h. Relation between cooling capacity and outdoor ambient temperature: Relation between EER and outdoor ambient temperature: 9. Accessories Name Qty. Purpose Installation & owner s manual 1 Seal ring 1 Condensate water. Water outlet jointing pipe 1 Condensate water. 24

25 Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual MCAC-HTSM Part. 3 Installation 1. Safety information Unit Installation Functions & maintenance Controller & operation Trial run Fault analysis and solutions

26 MCAC-HTSM Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual 1. Safety information To prevent injury to the user or other people and property damage, the following instructions must be followed. Incorrect operation due to ignoring of instructions may cause harm or damage. The unit must be earthed effectively. The earthing pole of socket must be grounded well, make sure that power supply socket and plug are dry enough and connected tightly. If the power supply cord is damaged, it must be replaced by the qualified person. Do not remove, cover or deface any permanent instructions, labels, or the data labels from either the outside of the unit or inside of unit panels. Ask qualified person to perform the installation of this unit in accordance with local national regulations and this manual. Improper installation may result in water leakage, electric shock or fire. Ask qualified person for relocating, repairing and maintaining the unit. Improper installation may result in water leakage, electric shock or fire. Electric connection work should obey the instructions of local power company, local electric utility and this manual. Never use the wire and fuse with wrong rated current, otherwise unit may break down and cause fire furthermore. Do not insert fingers, rods or other objects into the air inlet or outlet. When the fan is rotating at high speed, it will cause injury. In order to avoid injury, do not remove the fan guard of the units. Never use a flammable spray such as hair spray, lacquer paint near the unit. It may cause a fire. This appliance is not intended for use by person (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety. Children should be supervised to ensure that they do not play with the appliance. If the supply cord is damaged, it must be replaced by the manufacturer or its service agent or 26

27 Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual MCAC-HTSM similarly qualified person. Do not dispose this product as unsorted municipal waste. Collection of such waste separately for special treatment is necessary. Do not dispose of electrical appliances as unsorted municipal waste, use separate collection facilities. Contact your local government for information regarding the collection systems available. If electrical appliances are disposed of in landfills or dumps, hazardous substances can leak into the ground water and get into the food chain, damaging people s health and well-being. Before cleaning, be sure to stop the operation and turn the breaker off or pull out the power plug. Otherwise, an electric shock and injury may be caused. Children shall not play with the appliance. Do not operate the unit with a wet hand. An electric shock may be caused. An all-pole disconnection device which has at least 3mm clearances in all poles, and has a leakage current that may exceed 10mA, the residual current device (RCD) having a rated residual operating current not exceeding 30mA, and disconnection must be incorporated in the fixed wiring in accordance with the wire rules. Arrange the drain pipe to ensure smooth draining. Improper drainage work may cause wetting of the building, furniture, etc. Do not touch the inner parts of the controller. Do not remove the front panel. Some parts inside are dangerous to touch, otherwise a machine malfunction may be caused. After a long use, check the unit stand and fitting for damage. If damaged, the unit maybe fall and result in injury. To avoid oxygen deficiency, ventilate the room sufficiently if equipment with burner is used together with the water heater. Do not use the units for other purposes. Do not place items which might be damaged by moisture under the unit. Condensation may form if the humidity is above 80%, the drain outlet is blocked or the filter is polluted. The maximum inlet water pressure is 0.4MPa, when the pressure is more than 0.4MPa; please add a pressure-relief valve. The water may drop from the discharge pipe of the pressure-relief device and that this pipe must be left open to the atmosphere. The pressure-relief device is to be 27

28 MCAC-HTSM Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual operated regularly to remove lime deposits and to verify that it is not block. A discharge pipe connected to the pressure-relief is to be installed in a continuously downward direction and in a frost-free environment. The maximum target temperature is limited to 35 C in order to protect the swimming pool liner. 2. Unit Installation Enough space of installation and maintenance is available. The air inlet and outlet free from obstacles and strong wind. The bearing surface is level and can bear weight of the unit, and is suitable for installing the unit without increasing noise or vibration. The operation noise and the expelling of air do not affect neighbors. Installing the unit in any of the following places may lead to faults of the unit. (If that is inevitable, please consult the factory) The site contains mineral oils such as cutting lubricant. Hot spring area where corrosive gases exist, e.g., sulfide gas. Factories where the power supply voltage fluctuates seriously. Inside a car or cabin. Place like kitchen where oil permeates. Place where strong electromagnetic waves or flammable gases or materials exist. Other special environments. The unit must be shipped and stored in the upright position on a pallet and in the original packaging. In the contrary case, place the unit in the vertical position on the pallet and check its global state. Under no circumstances may the unit be operated immediately if it was placed horizontally. Wait at least 12 hours before operating the pump. 28

29 Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual MCAC-HTSM Unit outlook 2.2 Carrying of unit Decide the correct way of conveying the equipment. Try to transport the unit with orginal package. Please put down the unit as gentle as possible during removing, unit could be leaned no more than 45 degree. In order to avoid scratch or deform the unit surface, apply guard boards to the contacting surface. 2.3 Unit installation caution After move onto the installing site, please confirm the main unit is placed in horizontal. Choose the appliance installation site according to the following criteria: the clearance around the appliance must be respected to avoid recycling of air produced. Do not install the unit close to an inflammable gas source. Do not install the unit close to a road or path to protect the unit against mud splashing. If the unit needs to be insatlled on a metal part of the building, electric insulaton must be performed, and the installation must meet the relevant technical standards of electric device. Avoid places that are subject to strong winds, in particular if the wind blows against the appliance s air outlet. 29

30 MCAC-HTSM Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual The installation as well as electric and hydraulic connections must be carried out in compliance with applicable standards. Keep the unit out of reach of children. 2.4 Distance of unit ground screws (Unit: mm) Model A B C D E LRSJ-60/NYN1-A , LRSJ-80/NYN1-A , LRSJ-120/NYN1-A , LRSJ-140/NYN1-A , Unit installation space Ensure enough space for installation and maintenance. 30

31 Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual MCAC-HTSM Water pipe connection of the unit Water pipe joint specifications Name Outlet water pipe Inlet water pipe Drainage connecting pipe Connective pipe PVC Φ50 PVC Φ50 PVC Φ25 During installation of connective pipe, it must be ware not to let any dust or other foreign substance intrude into pipe system. Inlet and outlet water pipes can be installed as long as the water-heating unit has been fixed.. Thermal insulation materials should be employed to seal up inlet and outlet water pipes. Before operation, please confirm that the specifications of connective pipes are correct, and thermal insulation layer has been wrapped on pipes. It requires that all pipes have been sealed up, and no water leakage has been detected. 2.7 Hydraulic connections Connect PVC Φ50 hose inlet and outlet water of unit (according to label instructions) to the removeable fittings provided with the heat pump. Connection is established with a by-pass on the pool filtration circuit after the filter and before the water treatment device: Hydraulic circuit test pressure: 3 bar. Hydraulic circuit operating pressure: 1.5bar. 31

32 MCAC-HTSM Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual Average water flow 5.5m 3 /h pressure drop 0.22bar. Installation diagram V1, V2, V3: By-pass valve; V4, V5: Regulator valve (Recommended facilitating adjustment close to the machine. 2.8 Electric connection of the unit The heat pump water heater shall have a specialized power supply, which voltage must in compliance with the rated voltage. Power supply circuit of the unit with earthing wires that must be reliably connected. Wiring must be performed by professional technicians according to the circuit diagram. Power cable and signal cable shall be laid out orderly and properly separate power cable from signal cable. Power cable is attached to this equipment. User could select power cable by reference to power supply specifications. Shield wire must be employed for signal wire. 32

33 Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual MCAC-HTSM All wiring should be finished, before power is switched on to the unit, please confirm all connections are correct. Select the power supply and wire size according to this manual. The size of the power cable of the unit should be greater than that of ordinary motors. Check the subscriber grounding is effective. When power delivers to a certain wire individually (no power supply device is used). Wire size and continuous wire length in the following table only available for the case of the voltage decreasing range not exceeds than 2%. If the continuous wire length valve larger than the one of the table, please choose its size in compliance with the relevant rules. Model LRSJ-60/NYN1-A1 Power supply Min. wire size (mm 2 ) (Metal pipe & synthetic resin pipe wire) Size (Continuous length 30m) Ground wire LRSJ-80/NYN1-A V~, LRSJ-120/NYN1-A1 50Hz, 1Ph 4 4 LRSJ-140/NYN1-A1 4 4 Model Capacity Manual switch (A) Fuse RCCB LRSJ-60/NYN1-A LRSJ-80/NYN1-A LRSJ-120/NYN1-A mA Below 0.1sec. LRSJ-140/NYN1-A The power cord type designation is H07RN-F. Power supply device application refers to the following diagram. To be on safe side, an additional RCCB is necessary to be installed in the external power supply box. Power cable is that the main wire from deconcentrator and the auxiliary wire leading from 33

34 MCAC-HTSM Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual deconcentrator and connected to the power supply device. Please select the wire diameter by following methods: The diameter of main wire is conducted by the horsepower of the HPWH and preceding table. The diameter of the wire is connected from deconcentrator to power supply device be conducted by the horsepower of the HPWH and preceding table. Please do not reverse connections of low voltage electric signal wire with heavy electric wire, otherwise, some of electric control elements will burned out. The following diagram is electric wiring diagram for the units. 3. Functions & maintenance About the 3-minute protection Restart or open the manual switch after the unit has shut down. Unit will not start immediately until 3 minutes later, because of the self-protect function of the compressor. Characteristics of heat pump heating operation During operation, if outdoor temperature is higher than normal, the air supply motor will runs at low air volume or stop running. 34

35 Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual MCAC-HTSM About defrosting function perform at heating operation In case of the unit requiring deicing during heating operation, to prevent the heating efficiency from decreasing, defrosting operation will turn on automatically (Approx. 2~10min). In the process of defrosting operation, the unit air supply motor will stop running. Reminder: During the defrost cycle a steam cloud (water vapor) may appear from the back of the unit. (After a defrost cycle, when the fan is restarted, the cloud is evacuated to the back of the unit.) Operating conditions of the water heating heat pump In order to use the unit correctly, please ensure that operate is at correctly ambient temperature range. When water inlet pressure is over than 0.4MPa, a pressure relief valve has to be mounted at the water system. A sufficient water flow must pass into the unit. About protection device When protection device does operate, though the unit stops, the operating indicator of wired controller still will be blinking. When protection device operates, nixie indicator will display malfunction code. Please cut off the manual switch power when unit is faulty. Do not restart until problems are solved. Protection device will act when the following circumstances occur: Air inlet or outlet is blocked. Air in water or refrigerant system completely exhausted. Voltage is a little higher or lower compare to the voltage range. Start the unit after a long period out of service Start-up the unit after out of service for a long period (includes drive up a unit at the first time), you would see rust mix up water in red, flow out from tap. Such that is a normal circumstance, please be calmly and keep draining, after for a while rust will disappear. About power failure In case power failure during the unit working, please stop all operating actions. At the next startup after power failure, the RUN indicator of controller will blink slowly for 35

36 MCAC-HTSM Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual several seconds for noting user. Disoperation occurs during unit working: In case disoperation caused by lighting or vehicle radio, cut off the manual power switch, and turn it on again, afterward press RUN/STOP key. It is forbidden to switch the power off if ambient temperature below -7 C. In case of power failure or power need be cut because of maintenance, please open the drainage valves at the joints of water inlet and outlet pipes as soon as possible to draining out all water. Otherwise, components inside of the units may be damaged by freeze. Upon draining water, please close the water drainage valves. About RCCB The unit must use RCCB, please install an RCCB between in user power supply and the unit. In case the unit cannot act but not attribute to power failure, please check these RCCB switches at first. Before operate the RCCB, please ensure that the user installing switch is break off. After the RCCB has serviced for a period of time (Generally once a month), it is necessary to press the test button at close circuit to check whether the performance of RCCB is work normally (Every time press this button, RCCB would break-off once at a time). In case malfunction occurs, but no causes were found, it is permit to delivering power, you must check out the cause by feature test if necessary. If which detected and confirmed as its self-malfunction, please consigning a professional personnel to replace a new one or repair it immediately. About shut-off memory Every time when power is shut off, controller will save the current operate status automatically. When power comes on the next time, controller would deliver ON/OFF signal to the unit according to its memory before power failure. This function keeps unit always working on the mode which was set in the last time before power failure. About upkeep and maintenance Before leave the unit idle for a long period, please make sure the followings: Vacuum air completely inside the heat exchanger and water at pipelines, and turn off all 36 valves.

37 Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual MCAC-HTSM Check and clean the internal components of the unit at a regular base. After leave the unit idle for a long period, please check the followings: Inspect the air intake orifice or air outlet is blocked periodically. If any, remove the foreign substance to let the air flow fluently. Check whether pipes, valves have damaged or blocked, whether connection sites have leakage. If that so, please fix it. About heating capacity The heating process is a heat pump mode that it absorbs heat from outdoor and release to water. Once the outdoor temperature decreases, the heating capacity will also decrease simultaneity. Prior to any operation, check that the voltage on the name plate of the appliance corresponds to the mains voltage provided on site. 4. Controller & operation 4.1 Outlook of wired controller The wire of controller length is 1m. And the wired controller as defaults is fixed on the unit. After finishing the wired controller, the waterproof box of the controller must be covered to prevent the rain damaging it. 37

38 MCAC-HTSM Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual 4.2 Name and function description of LCD screen of wired controller 1. COOL indicator: When user sets the cooling water mode, it lights up. 2. HEAT indicator: When user sets the heating water mode, it lights up. 3. PUMP indicator: When user sets the pump mode, it lights up. 4. POOL TEMP indicator: The outlet water temperature. 5. SET TEMP indicator: Show the setting temperature and blank when screen protection. Codes are shown at the malfunction or protection time. 6. ALARM indicator: It will flash at the malfunction or protection time. 4.2 Names of keys on the controller 7. MODE key: Used to set different modes. 8. UP key: Used to add time or temperature. 9. DOWN key: Used to abate time or temperature. 10. LIGHT: Lighting means working. Light-off means standby. Lighting in 0.2s, and then light-off in 0.2s, it means reparable error. Lighting in 0.1s, and then light-off in 0.1s, it means data storage chip error. 4.3 Operation of wired controller Preparation before running the unit When running the unit for the first time, all the indicators on the wired controller will light for 3s, and then, the fiducial web will be display. After no operation for 40s, all indicators 38

39 Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual MCAC-HTSM will go out automatically except POOL TEMP indicator lighting. When the unit is running, if there is no operation or malfunction for 10s, the backlight of the display will go out automatically. After 30s, all indicator will disappear except operation mode and pool temperature. Mode selection The unit is enhanced with three operation modes, cool mode, heat mode and pump mode. Cool mode: The unit cools down swimming pool water by compressor driving according to heat pump principle. Used when the swimming temperature is high in summer. Heat mode: The unit heats swimming pool water by compressor driving according to heat pump principle. Used when the ambient temperature is low. Pump mode: The pump runs for circling the water. Used when trial run or other necessary situation. By defaults, the unit operates in heat mode. Press the mode key, operation mode will be shifted among three modes in a cycle. At the same time, the corresponding indicator on the screen will light up. Temperature setting Temperature displayed is the setting water temperature. The water temperature default is 28 C, the cool mode setting range is 10~30 C, and the heat mode setting range is 20~35 C. Press the UP and Down keys, the outlet water temperature can be increased or decreased. 39

40 MCAC-HTSM Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual Power on and power off Press ON/OFF button, and after all the above have finished, the system will run as the setting. Just simply press the same button to stop it. Operation status display When there is any error, the ALARM icon will glitter in error. 5. Trial run Trial run after being powered up for over 12 hours. Check that all valves are opened before trial run. Check the electric safety before trial run. Do not perform compulsory operation. (It is very dangerous if the protection device is not active.) Trial run is stop performed only after all installation is finished. Confirm the following insure before operation: 口 The water heating units is installed correctly; 口 The piping and wiring are correct. 口 The accessories are installed correctly. 口 The heat insulation is perfect. 口 The ground wire is connected correctly. 口 The power supply voltage is consistent with the voltage of the unit. 口 The air inlet and outlet of the unit is free from obstacles. The unit has self-protecting function, when power is supplied. If the unit is started or restarted instantly after it just has stopped, compressor will delay action until 3 minutes later. 40

41 Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual MCAC-HTSM In the process of trial run, please check the following items: 口 Check whether the switch of the wired controller is normal. 口 Check whether the functional keys of the controller are normal. 口 Check whether the indicators illuminate normally. 口 Check whether the manual operation buttons are normal. 口 Check whether the water heating operation is normal. 口 Check whether the outlet water temperature is normal. 口 Check for excessively noise during operation. 口 Check whether refrigerant leakage. 6. Fault analysis and solutions Normal operation Phenomena White aerosol or globule is given out. Make sound of hiss every now and then. Cause Air supply motor stops automatically to defrost. At the beginning and the end of the defrost process, sound is given out in motor valve. During the process or just after having stopped, sound like water flow occur, which will be amplified at the first 2~3 minutes, this is caused by process of refrigerant current or water. Slight hiss is caused by heat exchanger as temperature changes. The sound gives out because of heat expand and cold contracts of heat exchanger. Please check that again Phenomena Stop operation or start up automatically. No operate Inefficient heating Cause Check the timer whether it is correctly set. Detect anti-freezing mode is operating. Whether the power supply is cut. Whether the manual power supply switch is off. Whether fuse is broken. Whether the protection device works. (Operation lamp is lightened.) Whether it is the time set. (Operation lamp is lightened.) Whether the inlet and outlet of heat pump units is blocked. 41

42 MCAC-HTSM Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual In case of following malfunction, please cut off the manual power switch, and repair it. The fuse was burnt out frequently or the earth leakage protective device was broken up frequently. Only the red indication lamp flashes. Detail spot check display contents as following: Sequence System operation parameters Remarks 1st 2nd 3rd Normal display (Inlet water temperature) Mode code Operate mode Value of T6 0: 6KW; 1: 8KW; 2: 11.7KW; 3: 13.6KW 1 Water cooling; 16 Water heating;4 Pump; 8 standby 4th Fan speed 0: Off 1: Low 2:High 5th Ambient temperature Value of T4 6th Compressor discharge temperature Value of Tp 7th Pipe temperature Value of T3 8th Inlet water temperature Value of T6 9th Outlet water temperature Value of Tout 10th Compressor current Value of current 11st Setting water temperature Value of Ts 12nd The last error code or protection code Display the latest error code or protection code 42

43 Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual MCAC-HTSM Error code and protection code: Code Explanation Solution Check whether the communication wire is damaged. E2 E3 E4 E5 E7 E9 Outdoor unit and wired controller communication error. Outlet water temperature sensor Tout error. Inlet water temperature sensor T6 error. Evaporator pipe temperature sensor T3 error. Ambient temperature sensor T4 error. Water flows switch error. Check whether the communication wire is correctly connected to the motherboard. Check whether voltage provided is too low. Check whether the signal of communication wire is in strong electromagnetic interference. Check whether the Tout temperature sensor is damaged. Check whether the Tout temperature sensor is correctly connected to the motherboard. Check whether the signal of Tout sensor is in strong electromagnetic interference. Check whether the T6 temperature sensor is damaged. Check whether the T6 temperature sensor is correctly connected to the motherboard. Check whether the signal of T6 sensor is in strong electromagnetic interference. Check whether the T3 temperature sensor is damaged. Check whether the T3 temperature sensor is correctly connected to the motherboard. Check whether the signal of T3 sensor is in strong electromagnetic interference. Check whether the T4 temperature sensor is damaged. Check whether the T4 temperature sensor is correctly connected to the motherboard. Check whether the signal of T4 sensor is in strong electromagnetic interference. Check whether the water pump is damaged. Shut down the unit and start until water in pipe flow fluently. Check whether the water flow switch is correctly connected to the motherboard. Check whether the installation direction of water flow switch is correct. Check whether the water flow switch is damaged. 43

44 MCAC-HTSM Midea R410A Domestic Pools & Spas HPWH 50Hz Technical Manual Continues Code Explanation Solution Check whether the Tp temperature sensor is damaged. EE P0 P4 P6 PF Pb Discharge pipe temperature sensor Tp error. System high pressure protection 4.4MPa active, 3.2MPa inactive. Compressor current over-load protection. Evaporator pipe temperature over high protection Discharge pipe temperature over high protection Anti-frozen protection Check whether the Tp temperature sensor is correctly connected to the motherboard. Check whether the signal of Tp sensor is in strong electromagnetic interference. Check whether the high pressure protection switch is damaged. Check whether the refrigerant pipes is blocked Check whether the high pressure protection switch is correctly connected to the motherboard. Check whether the dial code S2 is correct. Check whether the voltage supplied is in the accepted voltage range. Check whether compressor is damaged. Check whether the refrigerant pipes is blocked Check whether the T3 temperature sensor is damaged. Check whether the T3 temperature sensor is correctly connected to the motherboard. Check whether the fan is running normally. Check whether the Tp temperature sensor is damaged. Check whether the system is short for refrigerant. Check whether the refrigerant pipes is blocked. Check whether T6 and Tout are correctly connected to the motherboard. Check whether T6 and Tout are damaged. The detected temperature of T6 and Tout is lower than 5. Normal protection, no need for treatment. 44