Midea M-Thermon A 12 kW Monobloc Air Source Heat Pump

The Midea M-Thermon A 12 (model MHC-V12W/D2N8-B2E30, code 14082175) is a monobloc air-to-water heat pump from the Arctic range, designed for heating and cooling homes and small buildings with a thermal demand of around 12 kW (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 storage 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 12)

• Heating A7/W35: 12.1 kW · COP 4.95
• Heating A7/W55: 11.9 kW · COP 3.05
• Heating A-7/W35: 10.0 kW · COP 3.00
• Heating A-7/W55: 9.8 kW · COP 2.05
• Cooling A35/W18: 12.0 kW · EER 3.95
• Cooling A35/W7: 11.5 kW · EER 2.75
• SCOP (average climate): 4.81 (W35) · 3.45 (W55)
• SCOP (warm climate): 6.53 (W35) · 4.43 (W55)
• SCOP (cold climate): 4.08 (W35) · 3.02 (W55)
• SEER (cooling): 4.89 (W7) · 7.10 (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 mwc
• Expansion vessel: 8 L
• Electric backup heater: 3,000 W
• Minimum system water volume: 60 L
• Nominal flow: 2.10 m³/h
• Hydraulic connections: 1 1/4″

Electrical and Acoustic Data

• Power supply: 220–240 V / 1 ph / 50 Hz
• Maximum current: 43 A  ·  Recommended protection: D45 circuit breaker
• Sound pressure: 53.0 dB(A)  ·  Sound power: 65 dB(A)

Refrigerant

• Type: R-32  ·  GWP: 675
• Charge: 1.75 kg  ·  t CO₂ eq: 1.18 t

Dimensions and Weight

• Outdoor unit (W × H × D): 1,385 × 945 × 526 mm
• Net weight: 155 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: prepared for external grid signal.

Required Components for DHW (not included)

• DHW storage/indirect tank with coil sized to demand.
• Tank sensor 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

Single-family homes and small buildings with underfloor heating, fan coils, or low-temperature radiators. The 100% water monobloc architecture reduces paperwork and speeds up commissioning thanks to USB configuration.

Installation and Maintenance

• Hydraulic supply/return connections; no refrigerant handling required.
• Observe 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: 12.1 kW (A7/W35) · 11.9 kW (A7/W55)
• Cooling capacity: 12.0 kW (A35/W18) · 11.5 kW (A35/W7)
• SCOP: 4.81 (W35, average climate) · 3.45 (W55, average climate)
• SEER: 7.10 (W18) · 4.89 (W7)
• DHW supply: up to 65 °C with external tank