Centrifugal Chillers

The operation of centrifugal chillers is based on the high-speed rotation of the turbine and gears. Therefore, lubricant replacement is important for maintaining optimal performance.
We offer various inspection options to fit your operation plan, such as the maintenance of optimal performance and maintenance to ensure long-lasting operation over 15 years or more.
By constantly maintaining a stable operation status, energy savings and reduction of CO2 emissions can be achieved.

Servicing Before the Start (End) of Cooling/Heating Season

  1. Inspecting safety devices

    Pressure sensors, thermosensors, and instruments are important safety devices that provide operation control data for ensuring proper performance and failure information. This service performs periodic performance checks.

  2. Inspecting electric circuits

    The control panel has circuits and functions for addressing various operational conditions, including a start-up circuit, capacity control circuit, safety circuit, stop circuit, remote control circuit, and power recovery circuit. The service checks that all circuits, ranging from circuits for normal control to circuits for emergency safety, are in working order.

  3. Replacing consumables

    Consumables include a filter dryer, which ensures the purity of the refrigerant circulating in equipment by removing foreign matter and moisture from the refrigerant, and oil filter and lubricant, which are required to lubricate important parts, such as bearings. These consumables are replaced annually.

  4. Test running

    After the completion of individual inspections, the equipment is test run in the actual operating environment to comprehensively check the operation status.

  5. On-Season Servicing (Optional)

    During cooling/heating seasons, chillers automatically perform the repeated cycles of continuous operation and start-stop control.
    For customers requiring stable operation during high-load periods, the early detection of minor problems is especially effective in planning stable operation through cooling/heating seasons.
    On-season servicing replaces daily inspection performed by customers with the manufacturer evaluating the operation status. The timing of service implementation and the number of service orders are configurable according to the customer’s request.

Cleaning of Heat Exchanger Tubes

  1. Cleaning evaporator (cooler) and condenser tubes

    The adhesion of contaminants to the inner surface of heat exchanger tubes may lower the heat transfer efficiency, resulting in inefficient operation or tube corrosion. To keep the inner surface of the tubes clean, cleaning with a bristle brush is recommended.
    By taking into consideration various circumstances, such as clean water passing through the tubes or water treatment to prevent contaminant adhesion or tube corrosion, the suitable timing of cleaning for each facility environment can be determined.

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Main Products


Six standard high-efficiency models with a cooling capacity of 220 to 1500 USRT are available.