Midea Combo RSJ-20/300RDN3-F Heat Pump for Domestic Hot Water

The Midea Combo RSJ-20/300RDN3-F heat pump for DHW offers sustainable domestic hot water production with high performance and native connectivity. Thanks to its efficiency, it is considered renewable energy and helps comply with current regulations (CTE 2019). It features an anti-legionella disinfection mode, integrated WiFi for control via the SmartHome app, and an auxiliary electric heater to reach sanitization temperatures.

Key Features

• Integrated 275-liter tank for homes and small businesses.
• WiFi connectivity as standard with control and monitoring via the SmartHome app.
• Anti-legionella disinfection mode: automatic weekly cycle.
• Wide operating range: ambient temperature from -7 °C to 43 °C.
• Output temperature from 38 °C to 70 °C (up to 70 °C during disinfection with electric heater).
• Efficient operation: heating capacity of 2 kW with 0.47 kW consumption.
• 3.15 kW auxiliary heater for peak demand and sanitization cycles.

Technical Specifications

• Model: Midea Combo RSJ-20/300RDN3-F
• Tank volume: 275 liters
• Heating capacity: 2 kW
• Heating consumption: 0.47 kW
• Auxiliary electric heater: 3.15 kW
• Water temperature range: 38 °C – 70 °C (up to 70 °C in disinfection)
• Ambient temperature range: -7 °C – 43 °C
• Airflow: 312 / 355 / 414 m³/h
• Sound pressure: 59 dB(A)
• Hydraulic connections: Ø 3/4” (DN20)
• Drain connection: Ø 3/4” (DN20)
• Power supply: 220–240 V / 1 / 50 Hz
• Power cable: 3×4 mm²
• Operating weight: 175 kg

Control and Connectivity

• Integrated WiFi with SmartHome app for temperature adjustment, scheduling, and status monitoring.
• Automated anti-legionella cycle: by default, once a week.

Applications and Compliance

Designed for single-family homes, apartments, and small businesses seeking to reduce energy consumption and emissions in DHW production. Its classification as renewable energy contributes to compliance with CTE 2019 for renovations and new builds (DHW demand chapter).

Installation and Recommendations

• Install in a room with adequate ventilation for air intake and exhaust.
• Provide condensate drainage (Ø 3/4” DN20) and siphon if necessary.
• Connect to 230 V single-phase with a dedicated line and specified section (3×4 mm²) and circuit breaker/RCD protection as per regulations.
• Respect the recommended DHW/return diameters and safety/mixing valves.
• Follow the maintenance plan and periodically check the anti-legionella cycle.

Contents and Accessories (depending on configuration)

• Unit with 275-liter tank and integrated auxiliary heater.
• Integrated WiFi connectivity (SmartHome app).
• Installation and user manual.

Notes

• The indicated values correspond to data provided by the manufacturer.
• For hydraulic sizing, accessories, and air duct lengths, consult the official installation guide.