Midea M-Thermon A 4 kW Monobloc Air Source Heat Pump

The Midea M-Thermon A 4 (model MHC-V4W/D2N8-B2E30, code 14082171) is a monobloc air-to-water heat pump designed for heating and cooling in well-insulated homes with low thermal demand (around 4 kW at A7/W35). It features R-32 refrigerant, wired control, WiFi connectivity, and compatibility with zoning systems (Airzone, Acuazone) and BMS.

Important: The unit does not produce domestic hot water (DHW) autonomously; to have DHW in the installation, an external tank/indirect tank (not included) with the corresponding hydraulic and control accessories is essential.

Key Features

• Services: Heating and cooling. DHW only with external tank.
• 100% water installation: Only hydraulic supply/return (no refrigerant handling).
• High temperature supply: Water up to 65°C with +5°C outdoor; up to 60°C with −15°C.
• Connectivity: WiFi (MSmartLife app), compatible with Amazon Alexa and Google Assistant.
• Smart Grid Ready and cascade operation without special control for power modulation.
• USB Setup: Fast parameterization and diagnostics via USB port.
• Zoning and BMS: Native Modbus RTU; BACnet/KNX via gateway.
• CTE 2020 / CYPE: Considered a renewable solution and included in the CYPE database.

Performance (M-Thermon A 4)

• Heating A7/W35: 4.2 kW · COP 5.1
• Heating A7/W55: 4.4 kW · COP 2.95
• Heating A-7/W35: 4.70 kW · COP 3.10
• Heating A-7/W55: 4.00 kW · COP 1.95
• Cooling A35/W18: 4.5 kW · EER 5.5
• Cooling A35/W7: 4.7 kW · EER 3.45
• SCOP (average climate): 4.85 (W35) · 3.31 (W55)
• SCOP (warm climate): 6.52 (W35) · 4.14 (W55)
• SCOP (cold climate): 4.06 (W35) · 2.63 (W55)
• SEER (cooling): 4.99 (W7) · 7.77 (W18)

Operating Ranges and Temperatures

• Outdoor DHW: −25…+43°C  ·  Outdoor heating: −25…+35°C
• Outdoor cooling: −5…+43°C
• DHW service: 40…65°C (via external tank)
• Heating service: 25…65°C  ·  Cooling service: 5…25°C

Hydraulics and Integrated Components

• Water pump: Available pressure 8.5 mca
• Expansion vessel: 8 L
• Auxiliary electric heater: 3,000 W
• Minimum system water volume: 40 L
• Nominal flow rate: 0.70 m³/h
• Hydraulic connections: 1″

Electrical and Acoustic Data

• Power supply: 220–240 V / 1 ph / 50 Hz
• Maximum current: 31 A  ·  Recommended protection: D20 A circuit breaker
• Sound pressure: 58 dB(A)  ·  Sound power: 58 dB(A)

Refrigerant

• Type: R-32  ·  GWP: 675
• Charge: 1.4 kg  ·  t CO₂ eq: 0.95 t

Dimensions and Weight

• Outdoor unit (W × H × D): 1,295 × 792 × 429 mm
• Net weight: 98 kg

Compatibility and Control

• Zoning: Airzone / Acuazone (underfloor heating, fan coils, radiators).
• Smart Home: MSmartLife app, Alexa, and Google Assistant.
• BMS: Native Modbus RTU; integration with BACnet/KNX via gateway.
• Smart Grid Ready: Ready for external grid signal.

Required Components for DHW (not included)

• DHW tank/indirect tank with coil sized to demand.
• Tank probe and 3-way valve for heating–DHW switching.
• Safety elements: safety valve, non-return valve, air vents, sanitary expansion vessel if required.
• Thermostatic mixing valve to limit consumption temperature.
• Secondary circulator if required by the system hydraulics.

Recommended Applications

Suitable for low-energy single-family homes or apartments with underfloor heating, fan coils, or low-temperature radiators. The 100% water monobloc design reduces paperwork and speeds up commissioning thanks to USB configuration.

Installation and Maintenance

• Hydraulic supply/return connections; no refrigerant handling required.
• Maintain service distances, level base, and anti-vibration elements.
• Size inertia and balancing according to minimum flow/volume.
• Check wiring sections and protections according to maximum current.

Performance Summary

• Heating capacity: 4.2 kW (A7/W35) · 4.4 kW (A7/W55)
• Cooling capacity: 4.5 kW (A35/W18) · 4.7 kW (A35/W7)
• SCOP: 4.85 (W35, average climate) · 3.31 (W55, average climate)
• SEER: 7.77 (W18) · 4.99 (W7)
• DHW supply: up to 65°C with external tank