Features for PCU-R Series
Stability and precision at the highest level of the class
Compatible with a wide range of applications in regulating the temperature of the circulating water.
High Precision and High Stability
Newly developed freezing cycle "Triple valve control" and control algorithm "Parallel task control"
Three types of control mode
Operation pattern is selectable from three types of control mode in match with installation environment and versatile applications. Efficient and optimum performance can be fully demonstrated conforming to purpose of application. High-precision mode infinitely good in precision, eco mode in pursuit of energy efficiency, and normal mode with high stability are available.
[ Normal mode ]
Control mode putting emphasis on responsiveness and stability. When control shifts either to cooling side or heating side, stability can be maintained by its following capability.
[ Eco and high-response mode ]
Control mode putting emphasis on energy saving and responsiveness.
In cooling, operation at low power consumption is enabled without using a heater.
This mode is also effective when load fluctuation and disturbance are great.
[ High-precision mode ]
"Control mode effective when control of higher precision is required.
The true value is demonstrated in any temperature range from -10°C to 80°C."
Wide range from -10 ℃ to 80 ℃
Resistant to high temperature circulating water return and load fluctuation
Energy saving and heater capacity -90%
Heater capacity was reduced by 90% in comparison with conventional freezing cycle 100% + heater control, and realized the energy saving. 15. Wide range from -10°C to 80°C
New structural design that pursues high reliability
Bottom tank structure
Complete water leakage prevention structure, double safety pan
Double tank structure for energy saving and stability
Cavitation preventing function
One-way exhaust structure (air cooling type)
Abundant external input / output functions
1. Error output
2. Various circulated water alarm output
3.Operation stop output
Check the operation / stop of the chiller. It can be used as a confirmation signal when controlling the operation of the chiller from the outside, and it can also be notified by a lamp of the operating status of the chiller.
4. Automatic water supply valve output
5.External temperature control
Primary PID control
The chiller unit is controlled to keep the temperature of circulating water near the work constant. The temperature of the circulating water is controlled directly to provide a stable control system, but the response to the disturbance is slow and the corrective action is limited.
In cascade control, the temperature of the object (PVm) is compared with the set temperature of the object (SVm), and the set temperature of the circulating water (SVs) is determined. Therefore, the temperature fluctuation due to disturbance is controlled quickly.
6. Emergency stop / alarm reset input
Equipped with an emergency stop input just in case. The chiller can be forcibly stopped by an external signal. It is possible to link the water leak sensor installed separately and the emergency stop button installed on the controlled device. E-99 is displayed at the time of emergency stop input and can be confirmed as a history. It can also be used by switching to the alarm reset input if necessary.
Emergency stop input from external devices such as leak detection sensor, emergency stop button, etc.
Emergency stop input can be switched to alarm reset input
7.External operation / stop input
Supports data communication with PLC
External remote control / error code identification
[ Communication items list ]
|Control settings||Timer / output setting||Initial setting||Communication settings||Cascade control setting|
|Control setting mode||Alarm settings||Digital filter||communication speed||Control type|
|Control mode setting||Water temperature upper limit alarm||Number of display digits||Data length||Cascade scaling upper limit setting|
|AT startup screen||Water temperature warning alarm||Key lock setting||Key lock setting||Cascade scaling lower limit setting|
|Proportional band (P)||Water temperature lower limit alarm||Standby mode
Yes / No
|Stop bit length||Secondary side auto tuning setting|
|Integration time (I)||Water temperature caution alarm||Password setting||BCC check function||Secondary side P value setting|
|Derivative time (D)||Water temperature lower limit alarm||Operation signal enable / disable||Communication address||Secondary side I value setting|
|Control water temperature (set value)||Delay time||External temperature input||Response delay time||Secondary D value setting|
|Water valve /
Operation output setting
|Anti-freezing operation||Secondary side digital filter setting|
|ON timer||Main expansion valve
|Secondary side bias correction|
|OFF timer||Secondary gain correction|
[ List of communication items ]
|Driving mode||Error history||Custom settings||Communication only
|Error display||Compressor high pressure||Heating expansion valve||Error history this time||Emergency stop / alarm
Reset input setting
|PV value input|
|Control water temperature
|Compressor high pressure||High pressure switch||Error history 1||Circulating water flow rate
|Outside temperature||Pump operating time||Compressor protection
|Second error 2||Bias correction||Run / stop|
|Control water pressure||Compressor discharge temperature||For full water
|Error history 3||Gain correction||Operation status check|
|Cooling water temperature||Compressor suction temperature||For water supply
|For heating PID output||Heater overheat prevention temperature||For water shortage
|PV value communication
|Cooling PID output||Main expansion valve||Emergency stop input||Fixed heater value setting|
|Heater current value||Cooling expansion valve|
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