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Installation and Owner's Manual
Split Air-source Heat Pump Water Heater
IMPORTANT NOTE:
Thank you very much for purchasing our product,
Before using your unit, please read this manual carefully and keep it for future reference. If you need
to consult the electronic manual, please go to this website: https://tsp.midea.com
MT-200R20E20
MT-300R20E20
MHW-F20WN3
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Table of Contents
Related Manuals for Midea MT-200R20E20
Summary of Contents for Midea MT-200R20E20
- Page 1 MHW-F20WN3 IMPORTANT NOTE: Thank you very much for purchasing our product, Before using your unit, please read this manual carefully and keep it for future reference. If you need to consult the electronic manual, please go to this website: https://tsp.midea.com...
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Page 3: Table Of Contents
CONTENTS 1 SAFETY PRECAUTIONS ..................01 2 GENERAL INTRODUCTION .................. 05 • 2.1 Outdoor unit ........................ 05 • 2.2 Water tank ........................05 • 2.3 Specifications ......................06 3 BEFORE INSTALLATION ..................07 • 3.1 Accessories ....................... 07 • 3.2 Space for maintenance ....................07 4 INSTALLATION PROCEDURE ................ -
Page 4: Safety Precautions
1 SAFETY PRECAUTIONS The precautions listed here are divided into the following types.They are quite important, so be sure to follow them carefully. Meanings of DANGER, WARNING, CAUTION and NOTE symbols. INFORMATION • Read these instructions carefully before installation. Keep this manual in a handy for future reference. •... - Page 5 DANGER • The operation of the thermal cut-out indicates a possibly dangerous situation. Do not reset the thermal cut-out until the water heater has been serviced by a qualified person. • Failure to operate the relief valve easing gear at least once every six months may result in the water heater exploding. Continuous leakage of water from the valve may indicate a problem with the water heater.
- Page 6 • Make certain that all electrical work is carried out by qualified personnel according to the local laws and regulations and this manual using a separate circuit. Insufficient capacity of the power supply circuit or improper electrical construction may lead to electric shocks or fire. • Be sure to install a ground fault circuit interrupter according to local laws and regulations. Failure to install a ground fault circuit interrupter may cause electric shocks and fire.
- Page 7 • This appliance can be used by children 8 years old and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they are supervised or given instruction on using the unit in a safe manner and understand the hazards involved. Children should not play with the unit. Cleaning and user maintenance should not be done by children without supervision. •...
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Page 8: General Introduction
2 GENERAL INTRODUCTION 2.1 Outdoor unit Table 2-1 Name ① Power cord enter ② Refrigerant gas valve ③ Refrigerant liquid valve ④ Air outlet ⑤ Air inlet Fig. 2-1 2.2 Water tank Table 2-2 Name ① Magnesium rod insertion port ②... -
Page 9: Specifications
2.3 Specifications Table 2-3 MHW-F20WN3 Outdoor unit model Indoor unit model MT-200R26E20 MT-300R26E20 Ambient temperature °C -15~46 Leaving water temperature °C 20~60 Capacity 2600 Heating Input 1000 General Hot water yield 0.0441 / 0.0562 Liquid side mm/inch φ6.35 / φI/4' Gas side mm/inch φ9.52 / φ3/8' Refriger- ant piping... -
Page 10: Before Installation
3 BEFORE INSTALLATION 3.1 Accessories Table 3-1 Qty. Shape Purpose Accessory Name Installation manual Need by master unit Manual of wired controller Wired controller instructions Wired controller components Control unit and display unit status Water drainage connection For condensate water draining Outdoor unit Water drainage pipe Condensate water drainage of unit bottom plate... - Page 11 3.2.2 Water tank installation and maintenance space, see Fig 3-3 ~ Fig 3-6. (Unit: mm) NOTE • If the water tank is completely installed outdoors, it is strongly recommended to install a rain shelter. • When the water tank is installed outdoors, the distance between the water tank and the fence is not less than 200mm.
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Page 12: Installation Procedure
4 INSTALLATION PROCEDURE NOTE • Ask your dealer or specialized person for moving, repair, and maintenance. • Install it in the place without direct sunlight and other direct heat radiations. If it can’t be avoided, please add a cover to prevent unit from direct sunlight. •... -
Page 13: Drain Hole Position
4.1.2 Water tank, see Fig. 4-4, Fig. 4-5 and Table 4-2. (Unit: mm) Table 4-2 Dimension Model 200L 1665 300L 1735 Please install the water tank fixing strip as shown in the figure to ensure that the water tank is stably fixed. Fig. -
Page 14: Pipe Connection
4.3 Pipe connection 4.3.1 Unit connection sketch Only with Aux.* Unit connection sketch, please refer to Fig.4-8. Connector Safe care Water tank G1/2（DN15） G1/2（DN15） Hot water outlet Gutters Φ9.52 Φ 6.35 G1/2（DN15） Cold water inlet Outdoor unit Water tank Fig. 4-8 Gutters Icons and meanings Table 4-3... - Page 15 4.3.2 PTR valve • The valve body unloading pressure is 850kPa, unloading temperature is 99°C, and the valve body opening energy value is 46kW, more details refer to certificate No:WMK26608. • PT valve is tightened with a 68N.m torque wrench. Apply sealant to the first 3 turns of screw thread before installation; After installation, the outlet of the drain pipe shall be installed face down, and the thread turns that are not screwed into the PT valve shall be less than 3 turns.
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Page 16: Vacuum Drying
NOTE • Do not let air, dust, or other impurities fall in the pipe system during installation. • The connecting pipe should not be installed until the indoor and outdoor units have been fixed already. • Keep the connecting pipe dry, and do not let moisture in during installation. • When connecting copper pipe, please wrap it with thermal insulation material. 4.4 Vacuum Drying 4.4.1 Purpose Vacuum drying should be performed in order to remove moisture and non-condensable gases from the system. -
Page 17: Refrigerant Charge
Table 4-5 Item Description Image Notice Connect the (low pressure side) hose Before performing vacuum drying, make sure that of a pressure gauge to the outdoor all the outdoor unit stop valves are firmly closed. unit gas pipe stop valve. 1. Mixing of pump lubricant with compressor oil could cause compressor malfunction and a one- way valve should therefore be used to prevent Connect the hose to the vacuum vacuum pump lubricant seeping into the piping... -
Page 18: Electrical Connection
5 ELECTRICAL CONNECTION CAUTION • The heat pump should use separate power supply with rated voltage. If voltage is not stable, please use stabilized voltage supply. • The external power supply to the heat pump should have ground wiring, which is linked to the ground wiring of the indoor andoutdoor unit. • The wiring work should be done by qualified persons according to circuit drawing. • A leakage protector should be installed according to the National Standard concerning electrical appliance. •... -
Page 19: Water Tank Temperature Sensor Installation
5.2 Water tank temperature sensor installation Connect the water tank temperature sensor wire connector to the outdoor unit T5L connector. Water tank temperature sensor T5L Fig.5-1 5.3 ODU & AUX. power connection NOTE If the water tank has the electric auxiliary heating(AUX.)function, please follow the steps below to connect the electric auxiliary heating power cord. 1. Remove the protective cover of the electric control box on the right side of the outdoor unit. Fig.5-2 2. Connect the electric auxiliary heating power line on the water tank to the corresponding port on the terminal block. Terminal block Fig.5-3... -
Page 20: Dial Code Definitions
3. Outdoor unit power supply. Terminal block o o o Power supply E-heater Fig.5-4 1. Electric counter 2. Global overcurrent and leakage circuit breaker 3. Electric leakage circuit breaker 4. Overcurrent circuit breaker CAUTION • A leakage protector must be installed on power supply box outside the unit according to the figure above. • Power supply with leakage protector must be installed inside or installed in the place that can satisfy water-proof requirements. -
Page 21: Check
6 CHECK NOTE Before switching on the unit, read following recommendations: • When the installation and parameter setting are completed, cover all the sheet metal of the unit well. • The unit should be maintained by professionals. For the water tank with electric auxiliary heater, please check the quality of the electric auxiliary heater according to the method in Chapter 6.1 before the Long-term operation to avoid damage to the unit or personal injury. 6.1 Quality inspection of electric auxiliary heater Table 6-1 Description... -
Page 22: System Parameters Check
6.2 System parameters check If the whole unit failed or in protection, the panel will display the corresponding code; when more than one failure or protection occurs, the order of failure protection will display. When checking, the number is displayed first, then the content. Press check button, you can go over parameters of the whole unit, the following table shows sequence of check: Table 6-2 Display content Instructions... -
Page 23: Operations And Performances
7 OPERATIONS AND PERFORMANCES CAUTION Please cut off the manual switch power when unit fails. Do not restart until problems are solved. 1) Characteristics of water heating——3 minute protection Restart or open manual switch after the unit has been shut down within a short time. Unit will not start immediately until 3 minutes later, because of the self-protect function of the compressor. 2) During operation, if outdoor temperature is higher than normal, the fan motor will runs at low air volume or stop running. -
Page 24: Maintenance
8 MAINTENANCE 8.1 Confirmation before running 1) Make sure whether ground wire is broken or fall off. 2) Power on the machine after all connections are qualified. 8.2 Troubleshooting when abnormal situation happens Before asking for serving or repairing, check the following points: • Non-mechanical malfunction 1) Water oozes from safety valve pressure relief opening - W hen water heating, cold water will expand when heated, water oozing is normal. Do not block it for safety consideration. - I f a large amount of water flows, it means safety valve is invalid.Stop using and replace safety valve. 2) Long period for heating a tank of water - I n winter, water heating efficiency will decrease because of low ambient temperature(about 0°C).It will take a longer time for water heating. -
Page 25: Water Quality Limitations
NOTE Frequency of Refrigerant Leak Checks: 1) For equipment that contains fluorinated greenhouse gases in quantities of 5 tonnes of CO2 equivalent or more,but of less than 50 tonnes of CO2 equipment,at least every 12 months, or where a leakage detection system is installed, at least every 24 months. 2) For equipment that contains fluorinated greenhouse gases in quantities of 50 tonnes of CO2 equivalent or more,but of less than 500 tonnes of CO2 equipment,at least every six months, or where a leakage detection system is installed, at least every 12 months. 3) For equipment that contains fluorinated greenhouse gases in quantities of 500 tonnes of CO2 equivalent or more,at least every three months, or where a leakage detection system is installed,at least every six months. -
Page 26: Error Code Shooting Table
9 ERROR CODE SHOOTING TABLE Table 9-1 Error Code Explanation Communication error Water tank temperature sensor error (T5L) ODU heat exchanger temperature sensor error (T3) ODU ambient temperature sensor error (T4) Suction temperature sensor error (Th) Discharge temperature sensor error (Tp) Clock chip error Smart Grid signal error E-heater error (Current is less than 2A when e-heater operating) High pressure protection Over load protection of fixed compressor... -
Page 28: Energy Efficiency
10.2 Energy efficiency... - Page 30 NOTE...