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Strong anti-interference ability, adopt RS485 widely-used communication protocol to implement PC real time control. Particular oil return protection, water-cooled and air-cooled modes option. Support 4 steps loading and 4 steps unloading function. Suitable for control air-cooled screw chiller or water-cooled screw chiller with 1-2 compressors.
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Air-cooled screw chillers, Water-cooled screw chillers, Brine chillers, Ground sources heat pump, Water sources heat pump.
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*Water-cooled and air-cooled modes option;
*Support compressor four steps loading/unloading function;
*Password protection function;
*Support trial run function;
*Compressor delay protection function;
*Off memory function;
*Particular oil return protection function;
*Support probe lost protection;
*Strong stability, 0.15-80MHz interference rejection, 4KV high voltage and surge resistance;
*SMT technology, 48 hours burn-in test for ensuring quality;
*MODBUS-RTU RS485 widely-used communication protocol, up to 1km max distance (Gateway Free);
*PCB surface painted with CRC, avoid leakage, short circuit, and erosion from acid/alkali/alcohol/humidity/salt spray;
*Featured with tension and torsion resistance probe, long working life.
*Wide voltage range, avoid misoperation caused by voltage fluctuation
*All I/O on control board fixed with indicator lights for intuitionistic estimation. Control logic implemented on the control board.
* Featured with European terminal blocks for I/O connection, easy assembly.
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Temperature setpoint, Temperature emendation, Operation mode, Water-cooled/Air-cooled types option, Liquid injection valve energize/de-energize temperature, Chilled outlet/inlet water high temperature, Trial run, Number of compressors and input on/off.
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*Controller dimension: 222.6mm×158mm, fixed by 4 fixing holes (Hole dia:4.5mm), transverse hole distance 215mm, vertical hole distance 113.5mm;
*20 digital inputs: Circulating water pump switch, Cooling water flow switch, Anti-freeze auxiliary heating fault, User fault chain, Circulating water pump overload, Remote control, Compressor oil lever switch and oil level pressure differential, Compressor high/low pressure, Compressor overload/overheat, Filter screen blockage.
*16 relay outputs: Circulating water pump, Anti-freeze auxiliary electric heating, Cooling water pump, Compressor startup Compressor 25% valve, 50% valve 75% valve, Compressor liquid injection valve, Compressor four-way valve, Fault output.
*4 analogue inputs: Temperature of cooling water supply, Temperature of cooling water return, Temperature of chilled water supply, Temperature of chilled water return. Extend up to 8 inputs.
*Suitable for MT500 Touchscreen HMI, SL800 Text HMI.
*2 Analogue outputs;
*Relay power output: 250V/5A;
*Transformer power output: 12V/1A.
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