Circulating fluid can be heated without a heater. Temperature stability ±0.1°C (when a load is stable) Circulating fluid pressure adjustable By controlling the DC inverter compressor, DC inverter fan, and electronic expansion valve simultaneously, it maintains the good temperature stability when the heat load fluctuates. Heating method using discharged heat makes a heater unnecessary. 21 20 19 Circulating fluid temperature [°C] 0 10 20 30 40 50 Time [Minute] 25 kW load 0 kW load Heat load fluctuation (0 kW . 25 kW) When a load is stable ±0.1°C * This is just an example diagram. Discharge pressure of the circulating fluid can be set with the operation panel. The inverter pump automatically controls the discharge pressure to the set pressure without adjusting the bypass piping under various piping conditions. Power consumption can be reduced by this control. (Operation to the set pump operating frequency is also possible.) fan pump DC inverter Inverter pump Inverter HRSH Existing model Circulating fluid Circulating fluid Compressor Compressor Hot discharged gas from refrigerant Cool fluid from refrigerant Cool fluid from refrigerant Heater HRSH Existing model Circulating fluid Circulating fluid Compressor Compressor Hot discharged gas from refrigerant Cool fluid from refrigerant Cool fluid from refrigerant Heater Operation display panel (Circulating fluid discharge pressure setup screen) Circulating fluid temperature [°C] 10 20 30 40 0 10 20 Temperature increase with the heating function Minute [Time] 30 40 When the product is used with the flow path switched for maintenance, the pressure adjusting function controls the discharge pressure to be stable. (Secure the specified minimum flow for each branch circuit.) * For HRSH250-A-20 * For HRSH250-A-20 Heater is not necessary even when ambient temperature is low. User’s equipment User’s equipment A User’s equipment B Automatically controls the discharge pressure to be stable. !Ambient temperature: 5°C !Power supply: 200 V 60 Hz !Circulating fluid flow: 125 L/min@0.5 MPa !External piping: Bypass piping Conditions !Outdoor air temperature: 32°C !Circulating fluid temperature setting: 20°C !Heat load in the user’s equipment: 25 kW !Power supply: 200 V 60 Hz !Circulating fluid flow: 125 L/min@0.5 MPa !External piping: Bypass piping + Heat load Conditions 3 Thermo-chiller Inverter Type Series HRSH Circulating Fluid Temperature Controller