New roof units from Mitsubishi Electric and low GWP R32 refrigerant

(March 18, 2024) Mitsubishi Electric is expanding its product portfolio to include low GWP air conditioning systems for medium and large commercial and industrial venues. The WSM3-G07 series roof racks represent power-based plug & play solutions.

Devices from the WSM3-G07 series

The series is available in eight output sizes from 80 to 180 kW and air flow between 16,000 and 33,000 m³/h. There are also 7 different configurations available.

The base variant represents a VR configuration where the rooftop air conditioning unit operates in recirculation mode. By increasing the supply of fresh air, the air in the room is renewed. Therefore air conditioning and air renewal is possible without an additional ventilation system.

The simplest variant with fresh air supply is the MF configuration – without HRG and exhaust system. The system can be expanded to include an exhaust air section (AX-F) or an exhaust air section plus a heat analyzer. There are various systems to choose from here.

Equipment

The device series includes accessories for connecting to the building management system via Modbus or BACnet. KIPlink (Keyboard In Your Pocket) offers an alternative or supplement to on-device display or on-site control technology. The system can be connected to the Internet via WiFi or LAN and operated from various devices. Additional add-on options include touch-screen room temperature control, air filtration and disinfection technology, various after-heaters, fan upgrades and additional smoke and CO₂ sensors.

An implemented security concept

Roof units use low GWP R32 refrigerant, A2L refrigerant. The WSM3-G07 series units are standard equipped with a refrigerant leakage sensor in the air duct directly behind the heat exchanger. This stops the system immediately if there is a refrigerant leak. To prevent the accumulation of leaked refrigerant, minimal ventilation is maintained. In addition, circulating air equipment can be equipped with safety devices to ensure connection with outside air at all times.

Mitsubishi Electric supports market partners with planning documents and training on A2L refrigerants such as R32. Events are offered on-site or online and cover application-related information on the design and installation of chillers, heat pumps and rooftop equipment.

The company provides a calculation tool for A2L refrigerators in which risk management can be created in three steps mitsubishi-les.com/de/download/tools/a2l-kaeltemittel-rechner is available.

More information can be found through Send an email to Mitsubishi Electric requested.