• IOF Sensing

“The fastest response in the industry and exceptional accuracy for stable operation.”The IOF sensor provides superior stability of the chilled water temperature by continuously measuring the inlet water temperature, outlet water temperature, and flow rate. It responds to changes in load and flow rate during the production process faster and more accurately than conventional chillers.

• IOF Sensing delivers outstanding, next-level responsiveness.

The IOF sensor ensures superior stability in chilled water temperature control by continuously measuring the inlet water temperature, outlet water temperature, and flow rate. It responds to changes in load and flow during the production process faster and more accurately than conventional chillers.

PCU-SL Series

Maintains chilled water temperature steadily by responding quickly to changes in load and flow rate.

Conventional chillers

The chilled water temperature fluctuates widely and takes a long time to respond to changes in load and flow rate.

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• Maximum Accuracy ±0.1℃

Chillers are used under a wide range of conditions, meaning there are variations in flow rate, load, and other factors. Unlike conventional chillers, the PCU-SL series continuously measures and controls the inlet water temperature, outlet water temperature, and flow rate, keeping all values within the specified standard range and maintaining temperature with an accuracy of ±0.1℃.

PCU-SL Series

Measuring the flow rate alongside the coolant temperature allows for optimal operational control.

Conventional chillers

The coolant temperature fluctuates widely because the flow rate is not measured, and temperature is controlled only based on the temperature difference (*under conditions of low flow rate and low load).

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• Stable Cooling Capacity – Air-Cooled System

Lambda Airflow Design for Consistent Performance’

The Lambda Airflow Design features multi-directional airflow paths at the top of the unit, maximizing condensation area and evenly distributing air between the upper and lower sections of the chiller, unlike conventional chillers. This design maintains stable performance even under high-temperature conditions or when the air filter is clogged.

High-Temperature Conditions – Provides excellent cooling performance even on extremely hot days up to 45°C.

Clogged Filter – Even when the filter is 80% clogged, the cooling capacity remains at 75%.

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• Water-Cooled System – 'Tower Condenser Provides Consistent Performance'

The high-performance tower condenser helps control the accumulation of cooling water, maintaining up to 90% operational efficiency. It can sustain the performance of the cooling water even under high-temperature conditions and low flow rates, making this tower condenser best in its class.

High Cooling Water Temperature – Maintains high cooling capacity even when the cooling water temperature reaches 45°C.

Low Cooling Water Flow – Maintains 96% of cooling capacity even at a cooling water flow rate as low as 15 L/min.

• Double Crank Structure

‘The most durable structure in the industry, providing exceptional reliability.’ The main double-crank structure ensures stable operation, not only during domestic transportation within Japan but also for long-distance shipping overseas.

• Double-Crank Structure with Maximum Acceleration Resistance of 1.92G – Designed to meet the U.S. Department of Defense (MIL) military standards, this structure is exceptionally robust and can withstand vibrations up to 1.92G. This chiller remains reliable even in environments with severe vibrations, such as during long-distance overseas transportation.

• Top-Bottom Segmented Design Supporting IP-x4

Water Resistance Standard – When used outdoors, the PCU-SU series’ top-bottom segmented structure protects electronic components and other parts from the external environment. This design provides excellent water resistance, exceeding the strict JIS IP-x4 testing standard.

• Three-Valve Control / Wide Operating Range

“Three-valve control allows versatile operation.” In addition to the main valve, the PCU-SL series chiller is equipped with a refrigeration valve for controlling low-temperature refrigerant and a heating valve for controlling exhaust heat, enabling it to handle a wide range of operating conditions.

• Wide operating range from –5°C to 45°C

The three-valve control provides high flexibility, allowing the chiller to be used in all types of applications. One of the key features of the three-valve system is its ability to reduce the temperature of the cooling water returning to the compressor by bypassing low-temperature water, while older chiller models would stop operating when receiving high-temperature cooling water. The three-valve control enables the chiller to operate even when the circulating water temperature is above 45°C or below –5°C. In addition, the post-heat exhaust valve prevents excess heat generation during operation, reducing common causes of damage and improving energy efficiency.

• Inverter Control – 'Newly Developed Energy-Saving Inverter'

The compressor, fan motor, and pump are controlled by a newly developed inverter. Continuous cooling that matches the load appropriately helps save up to 50% energy. The fan motor is used for air-cooled systems only.

Energy savings of up to 50% – Maintains the operating speed of the compressor, fan motor, and pump at the optimal level.

Flexible operation control – Conventional chillers control operation based on a fixed pump speed, but the PCU-SL series chillers control operation using additional reference parameters, including 'coolant pressure' and 'coolant flow rate'.

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• Flexible and easy to use interface & display

The compressor, fan motor, and pump are controlled by a newly developed inverter, providing continuous cooling that matches the load appropriately, helping save energy by up to 50%.External outputs:
External inputs:

• Stop input
• Error reset input
• Emergency stop input

External communication:

• Ethernet (10BASE-T / 100BASE-TX)
• Communication protocols (Socket, MC protocol)

Timer functions:

• Timer ON function
• Timer OFF function

Operation monitoring:

• Compressor operating time
• Fan operating time
• Pump operating time

Guidance and assistance functions:

• Menu guidance function
• Troubleshooting help
• Button lock / password setting function

• Stop output
• Error output
• Pump output
• Maximum coolant temperature output
• Minimum coolant temperature output

The MC protocol significantly reduces the workload for program preparation and debugging, allowing the system to start operating more quickly and saving more costs than ever before.

‍*MC protocol stands for Melsec Communication Protocol.

Example: For changing the circulating water temperature setting

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High-Performance Chillers

Air-Cooled Chiller PCU-SL10000 (suitable for outdoor installation)

• Cooling Capacity (W): 10,300 / 10,300
• Heating Capacity (W): 2,500
• Circulating Water Temperature Range (Fresh Water) (℃): 5–45
• Temperature Control Accuracy (°C): ±0.1
• External Dimensions (H × W × D) (mm): 1,468 × 850 × 750

Air-Cooled Chiller PCU-SL14000 (suitable for outdoor installation)

• Cooling Capacity (W): 13,300 / 13,300
• Heating Capacity (W): 2,500
• Circulating Water Temperature Range (Fresh Water) (℃): 5–45
• Temperature Control Accuracy (°C): ±0.1
• External Dimensions (H × W × D) (mm): 1,496 × 850 × 750

Water-Cooled Chiller PCU-SL12000W (suitable for outdoor installation)

• Cooling Capacity (W): 12,000 / 12,000
• Heating Capacity (W): 2,500
• Circulating Water Temperature Range (Fresh Water) (℃): 5–45
• Temperature Control Accuracy (°C): ±0.1
• External Dimensions (H × W × D) (mm): 1,349 × 850 × 750

Water-Cooled Chiller PCU-SL15000W (suitable for outdoor installation)

• Cooling Capacity (W): 14,200 / 14,200
• Heating Capacity (W): 2,500
• Circulating Water Temperature Range (Fresh Water) (℃): 5–45
• Temperature Control Accuracy (°C): ±0.1
• External Dimensions (H × W × D) (mm): 1,349 × 850 × 750