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SL1600-DU Duct Unit Controller
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Advantages
 

With 3 speed blower auto control, Phase sequence/phase loss protection; Self-diagnostics protection; Parameter password protection; Two steps electric heating/auxiliary electric heating optional, support auto defrost and forced defrost, Suitable for 1~ 2 compressors duct A/C unit.
Compatible A/C types
 

1~2 compressors duct A/C unit.
Function
 

*Built-in phase sequence/phase loss protection;
*Two steps anti-freeze and intelligent defrost;
*With 3 speed blower auto control;
*Trial run and off memory function;
*Condenser fan is directly controlled without additional pressure control switch;
*Support auto restart function and terminal chain control;
*With timer ON/OFF, service remind and lock function
*Liquid circuit valve control, enhance the safety for compressor operation;
*Compressor delay function and auto balance spoilage for multi compressors;
*Compressor motor protection, high/low pressure protection;
*Built-in compressor current detection, no need overload protector;
*High/low temperature protection for inlet/outlet water
*Probe lost protection;
*Strong stability,0.15-80MHz interference rejection, 4KV high voltage and surge resistance;
*SMT technology, 48 hrs 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;
*Control logic implemented on the control board.

Modifiable parameter
 

Auto restart, setpoint emendation, temperature settpoint temperature differential, Load/unload setpoint, compressor low pressure delay, water flow delay, defrost temperature differential, defrost energize/de-energize temperature/cooling tower fan energize/de-energize temperature, defrosting turnoff temperature/cooling tower fan turnoff temperature, minimum defrost Interval/cooling pump energize time, maximum defrost Interval/cooling pump delay de-energize time, heating condenser fan tenergize temperature/cooling water-out high temperature protection, cooling condenser fan de-energize temperature/cooling water-out low temperature protection, forced defrost, compressor overload, number of compressor, temperature control modes, liquid circuit valve delay time, four-way valve energize/de-energize, digital input normal on/off.
Fundamental parameter
 

*Controller dimension: 187mm×131mm, fixed by 4 fixing holes (Hole dia:4.5mm), transverse hole distance 159.3mm,   vertical hole distance 114mm;
*12 digital inputs;
*12 relay control outputs;
*6 analogue inputs :supply air temperature, 1# frost temperature, 2# frost temperature, ambient temperature;return air temperature;
*2 Current analogue inputs:1#compressor current, 2# compressor current;
*Suitable for SL300 Text HMI, SL100 Color character HMI;
*Relay power output: 250V/5A;
*Transformer power output: 12V/1A.
 
 
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