1. Features of products:
*The unit adopts world famous advanced half-closed screw type compressor, motor without consideration of axis-sealed and leaking.
*Two or more compressors start up and stop in turn to control system and each has balance load to prolong the life shelf of all components.
*Two or more compressors adopt many cooling loops, when one of which is in the course of maintaining, the others can run as usual and have standby using feature.
*The compressor starts up with a uninstalling and pressure-decreasing measure, that will be no impact on electrical net.

2. Easy to installation:
*The unit can save the area and machine room space with compact structure.
*The frame is building block type so that unit can be fixed in a dispersing condition which overcomes the problem that the unit is so big to enter scene.
*With installation bottom rock to save the trouble of making groundwork, the installation for such unit is quite convenient.
And also can use groundwork to instead of rock.
*Before leave factory, all units have been filled with R22 refrigerant and lubricant and debugged up to grade.
*There is a water flow switch in the unit when it is out from the factory.
* Little shake in the unit so that no need set else anti-shake equipment.
*Just the evaporator, condenser and water tube need to be connected, easy to install.

3. Low cost for running maintenance:
*Decrease time and cost for installation.
*The unit can realize intelligent process control according to load requirement:100%,75%,50%,25%,0,save the energy.
*The total parts of compressor is just 1/10 compared with reciprocating type, the compressors have the features of simple structure, less easy-broken pieces, without inlet valve, insensible to wet journey and with low fault probability.
*The screw compressor can run for 40,000 hours without trouble.

4. Complete safety and protection function:
*Pressure-protection: High and low pressure-protection equipments.
*Motor-protection: Voltage-losing, phase-lacking and phase-conversing protection.
*Anti-freezing protection: When the temperature of cold water is too low, the unit will protect itself automatically so that
the water tube will not be cracked by freezing.
*Safe valve protection: When the refrigerant pressure is over some fixed value, the safe exhaust valve will open automatically.
*The different protections above make the unit run in a safe and stable way.

5. Features for screw type compressor:
*Adopt high-efficiency and motor imported from France, it is with high efficiency and sound security.
*Four segments of control system for uninstalling volume allow adjusting.
*Matched with high-precision bearing from Germany FAG and Sweden SKF.
*Low shake and noise.

6. PLC microcomputer control:
*Adopt Japan Omron programmable PLC controller, easy to operate, there are two types, text display and touch screen from Japan Digital company.
*Inspect outlet temperature of cold water and adjust compressor to reduce energy consumption by PLC control slide valve automatically.
*Intuitionist and obvious view, all different water temperature dots and running time will be displayed directly, they will be clear at a glance.
*The latest alarm instance and happened time of any trouble will be reported and kept, and at the same time there is a trouble disposal hint in the display.
*The original contents are corrected according to actual needs (by password): like inlet and outlet water temperature, every protection point of unit, pressure and so on.

7.Running state display:
*Animated display shows running state of the unit, including compressor operation, refrigerant and water flow state and temperature value.
*It is convenient to know running state of the unit.
*There are two types of work measure: automatically or manual operation, more suitable for option.