Heat pump indoor unit Mitsubishi Electric Ecodan with integrated boiler ERST20F-YM9E (200 litres)

Mitsubishi Electric Ecodan ERST20F-YM9E heat pump indoor unit with an integrated 200-liter boiler is a high-performance hydraulic module for heating, cooling and domestic hot water systems. The model is suitable for private houses, large cottages, villas, administrative premises, small hotels, offices and other properties where a reliable air-to-water system is required.

ERST20F-YM9E operates together with a Mitsubishi Electric Ecodan outdoor unit. The outdoor unit uses energy from the outdoor air, while the indoor module transfers it to the building’s water circuit and provides domestic hot water production. This solution makes it possible to combine several engineering functions in one system and improve the energy efficiency of the property.

Integrated 200-liter boiler

The model is equipped with an integrated 200-liter domestic hot water tank. This water reserve is suitable for active household use, several bathrooms, the kitchen, shower areas and the daily needs of a family. The integrated design eliminates the need to install a separate boiler, saves space and makes the system more compact.

The tank is made of stainless steel. This material is resistant to corrosion, suitable for most water types and designed for long-term operation. For domestic hot water systems, this is especially important because the tank is constantly in contact with water and must remain reliable for many years.

Protection of the domestic hot water system

The indoor unit is equipped with an anti-scale filter that protects the DHW heat exchanger against limescale accumulation. This helps maintain stable heat exchange efficiency, reduces the risk of contamination of internal elements and extends the service life of the equipment.

This protection system is especially useful for properties with regular hot water consumption. It maintains the reliability of the hydraulic module and helps reduce the likelihood of additional maintenance.

Three Ecodan operating modes

Mitsubishi Electric Ecodan ERST20F-YM9E supports heating, cooling and domestic hot water production. This makes the system versatile and convenient for year-round use. During the cold period, it provides heating; in summer, it can be used for cooling through compatible water emitters; and hot water remains available at all times.

This format is especially convenient for houses and properties where a single engineering system is required instead of several separate solutions. One complete system can be responsible for heating, cooling and domestic hot water production.

Control of two independent zones

The Mitsubishi Electric Ecodan system allows control of two independent heating zones. This makes it possible to use different temperature modes and different types of heating devices. One circuit can operate with underfloor heating, while the other can use radiators, fan coils or fan-assisted convectors.

Separate regulation increases comfort and helps reduce unnecessary energy consumption. The user can set the temperature separately for different floors, living rooms, bedrooms, bathrooms or work areas.

Operation at low outdoor temperatures

As part of a compatible system, the heat pump provides an outlet water temperature of up to 60°C at an outdoor temperature down to -3°C without a backup power source. Rated heating capacity is maintained in the range from +7°C to -3°C, which is important for stable operation under real heating season conditions.

Guaranteed system operation is possible at outdoor temperatures down to -25°C. This makes Mitsubishi Electric Ecodan ERST20F-YM9E a reliable solution for heating houses and properties in Chisinau, suburbs and other regions of Moldova.

Self-adaptive automation

The self-adaptive control mode ensures economical operation without compromising comfort. The system takes passive heat gains into account: solar radiation, the presence of people, heat from household appliances and other factors. Based on this data, the automation adjusts heat pump output and supports the building’s actual heating demand.

The user does not need to constantly change complex settings. It is enough to set the desired comfortable temperature level, and the system will adapt its operation to the indoor conditions.

Defrosting for stable winter operation

In cold weather, the defrosting process helps maintain correct operation of the outdoor unit. The average defrosting duration is no more than 10 minutes, so the impact on thermal comfort is minimized. This is especially important if the heat pump is used as the main heating source.

Remote control via Wi-Fi

When an additional Wi-Fi interface is installed, the system can be connected to the secure MELCloud service. Control is available from a smartphone, tablet or computer. The user can remotely change modes, control temperature, manage hot water and monitor equipment operation.

This is a convenient solution for private houses, countryside properties, commercial premises and buildings where constant monitoring of the engineering system is required.

Installation flexibility and convenient design

The Mitsubishi Electric Ecodan split system provides installation convenience thanks to the possibility of laying refrigerant lines with a total length of up to 80 meters. This allows the optimal location of the outdoor unit and indoor module to be selected, taking into account the building architecture, maintenance access and site characteristics.

In a split system, freeze protection is not required, which simplifies operation and makes the system more convenient for long-term use. Mitsubishi Electric Ecodan ERST20F-YM9E is a reliable heat pump indoor unit with an integrated 200-liter boiler for heating, cooling and domestic hot water production in a modern home or commercial property.