This document describes the Midea R410A Domestic Pools & Spas Heat Pump Water Heater 50Hz, A1 Series Technical Manual.
Function Description
The Midea R410A Domestic Pools & Spas Heat Pump Water Heater (HPWH) is designed for heating domestic pools and spas. It operates on a heat pump mode, absorbing heat from the outdoor environment and releasing it into the water. The unit is equipped with a titanium heat-exchanger, which offers high resistance to corrosion and eliminates the need for a secondary heat-exchanger, thereby reducing installation costs and improving overall system efficiency. The system uses environmentally friendly R410A refrigerant, ensuring no discharge of poisonous gas and minimal environmental pollution. It features easy operation and automatic control via a wired controller with an LCD display. The unit includes automatic start-up, shutdown, and defrosting functions, and operates effectively within an outdoor temperature range of -7 °C to 38 °C, unaffected by night, overcast skies, rain, or snow. Multi-temperature sensors continuously monitor the unit's operating status.
Important Technical Specifications
Models Covered:
- LRSJ-60/NYN1-A1
- LRSJ-80/NYN1-A1
- LRSJ-120/NYN1-A1
- LRSJ-140/NYN1-A1
General Specifications (Common to all models unless specified):
- Power Supply: 220-240V~, 1Ph, 50Hz
- Refrigerant Type: R410A
- Refrigerant Control: Capillary
- Fan Type: Axial fan
- Water Cycle Type: Without water pump
- Water Pipe Connections:
- Inlet/Outlet Pipe: Φ50 mm
- Drainage Pipe: Φ25 mm
- Max/Min Resisting Pressure: 0.15MPa/0.4MPa
- Min. Volume Flow: 0.8 m³/h (for LRSJ-60/NYN1-A1, LRSJ-80/NYN1-A1)
- Max. Volume Flow: 20 m³/h (for LRSJ-60/NYN1-A1, LRSJ-80/NYN1-A1)
- Outdoor Unit Voltage Range: Min. 198V, Max. 254V
Model-Specific Heating Capacity and COP (Outdoor Ambient Temperature 24/19°C DB/WB, Inlet Water Temperature 27°C, Outlet Water Temperature 29°C):
- LRSJ-60/NYN1-A1:
- Nominal Heating Capacity: 6.0 kW
- Input: 1.150 kW
- COP: 5.22
- Refrigerant Discharged: 1.00kg
- MCA: 26.7A, TOCA: 16A, MFA: 20A
- Compressor RLA: 8.5A, MSC: 26.7A
- LRSJ-80/NYN1-A1:
- Nominal Heating Capacity: 8.0 kW
- Input: 1.580 kW
- COP: 5.27
- Refrigerant Discharged: 1.25kg
- MCA: 34.5A, TOCA: 18A, MFA: 20A
- Compressor RLA: 9A, MSC: 34.5A
- LRSJ-120/NYN1-A1:
- Nominal Heating Capacity: 11.70 kW
- Input: 2.350 kW
- COP: 4.98
- Refrigerant Discharged: 1.60kg
- MCA: 61A, TOCA: 20A, MFA: 25A
- Compressor RLA: 11.4A, MSC: 61A
- LRSJ-140/NYN1-A1:
- Nominal Heating Capacity: 13.60 kW
- Input: 2.550 kW
- COP: 5.33
- Refrigerant Discharged: 1.85kg
- MCA: 63A, TOCA: 22A, MFA: 25A
- Compressor RLA: 13.1A, MSC: 63A
Model-Specific Cooling Capacity and EER (Outdoor Ambient Temperature 35/24°C DB/WB, Inlet Water Temperature 27°C):
- LRSJ-60/NYN1-A1:
- Capacity: 4.00 kW
- Input: 1.25 kW
- COP: 3.20
- LRSJ-80/NYN1-A1:
- Capacity: 5.80 kW
- Input: 1.50 kW
- COP: 3.87
- LRSJ-120/NYN1-A1:
- Capacity: 8.25 kW
- Input: 2.50 kW
- COP: 3.30
- LRSJ-140/NYN1-A1:
- Capacity: 10.35 kW
- Input: 2.90 kW
- COP: 3.57
Dimensions (W×H×D):
- LRSJ-60/NYN1-A1 & LRSJ-80/NYN1-A1: 1,015×705×385 mm
- LRSJ-120/NYN1-A1 & LRSJ-140/NYN1-A1: 1,050×855×315 mm
Noise Level: 58 dB(A) (for LRSJ-120/NYN1-A1, LRSJ-140/NYN1-A1)
Usage Features
- Easy Operation: The unit is controlled via a wired LCD display controller, simplifying system management.
- Automatic Functions: Features automatic start-up, shutdown, and defrosting, reducing the need for manual intervention.
- Wide Operating Range: Operates effectively in outdoor temperatures from -7°C to 38°C for heating and 15°C to 43°C for cooling.
- Safety Features: Includes high-pressure protection, compressor over-load protection, evaporator pipe temperature over-high protection, and anti-frozen protection.
- Water Flow Switch: Monitors water flow to ensure proper operation and prevent damage.
- Temperature Sensors: Multiple sensors (T1, T3, T4, T5, T6, Tp, Tout) monitor various temperatures (outlet water, heat-exchanger, outdoor ambient, inlet water, compressor discharge, pipe) to ensure optimal performance and protection.
- Controller Display: The LCD screen displays current pool temperature, set temperature, and operating mode (COOL, HEAT, PUMP). It also features an alarm indicator for malfunctions or protection events.
- Mode Selection: The unit offers three operation modes: cool mode, heat mode, and pump mode. The controller allows easy switching between these modes.
- Temperature Setting: Water temperature can be set between 10-30°C for cool mode and 20-35°C for heat mode.
Maintenance Features
- Self-Protect Function: The compressor has a 3-minute protection delay before restarting, safeguarding the unit.
- Defrosting Function: During heating operation, the unit automatically performs defrosting when necessary. The air supply motor may stop, and a steam cloud may appear from the back of the unit during this process.
- Protection Device: If a protection device operates, the unit stops, and the wired controller indicates a malfunction code.
- Regular Checks:
- After long periods of inactivity, inspect the air intake/outlet for blockages and remove any foreign substances.
- Check pipes and valves for damage or blockages, and connection sites for leakage.
- Verify the unit stand and fittings for damage to prevent falling.
- Regularly operate the pressure-relief device to remove lime deposits and ensure it is not blocked.
- Error Codes: The controller displays specific error codes (E2, E3, E4, E5, E7, E9, EE, P0, P4, P6, PF, Pb) to help diagnose malfunctions, such as communication errors, sensor failures, water flow issues, or pressure problems.
- RCCB (Residual Current Circuit Breaker): An RCCB is recommended for installation in the external power supply box and should be checked periodically (at least once a month) by pressing the test button to ensure it functions correctly.
- Power Cable: The power cord type designation is H07RN-F. The manual provides guidelines for selecting appropriate wire sizes based on continuous length and capacity to ensure safe electrical connections.
- Cleaning: Before cleaning, stop the operation and turn off the breaker or unplug the power supply.
- Professional Installation and Repair: Installation, relocation, repairing, and maintenance should only be performed by qualified personnel in accordance with local regulations and this manual.
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