Water-Cooled screw chillers

Water quality management

The poor quality of chilled water and cooling water will not only cause fouling of heat exchanger, affect exchange efficiency and reduce unit performance, but also cause serious failure of heat exchanger. Customers should treat water according to G В 50050-2007, code for <Design of Industrial Recirculating Cooling Water T reatment>. Soft water shall be used when the chilled water system is a closed system. During the operation of the unit, the cooling water (chilled water of the open system) shall be sampled and analyzed regularly.
The water quality needs meet the requirements in the following table. If it fails to meet the requirements, the water quality shall be treated.
In order to ensure the safe operation of the unit, the water source of the unit must not cause corrosion, blockage and other damage.
For projects whose water quality fails to meet the requirements of relevant standards, it is suggested that users install secondary heat exchange or conduct corresponding water treatment. If the water quality fails to meet the above requirements, Haier shall not be responsible for the consequences. Water quality standards are as follows:

Twin-screw com pressor

• 5-to-6 screw rotor profile
•  Slide valve
• 10% energy saving compared to conventional screw compressor

Compressor cut-away view

Sub cooling design

Flooded type heat exchanger

• Flooded type heat exchanger adopts high efficient heat tubes.
• Single path design, reducing water side resistance.

Cyclone oil separator

•  Patented cyclone design
• Oil separator efficiency reaches more than 99.9%
• Reduce refrigerant side thermo resistance effectively

Protection device

• There are lots of protection devices to ensure the stable operation of the unit.
• Compressor motor protector: Ensure stable running of compressor
• Water flow switch: Detection and control of water flow
• Pressure sensor: Second protection in pressure control
• Pressure switch: Ensure the products running in the normal pressure range
• Safety valve: Prevent the unit from dangerous in case of fire

Easy Installation

Pre-charged refrigerant
Refrigerant is pre-charged in the factory before shipment, and only the water pipe, power supply need to be installed on jobsite.

Standard flow switch
Water flow switch is standard part for convenient installation.

Standard bar clasp and connection pipe assembly
Bar clasp and connection pipe assembly are standard parts to make the pipe connection easier.

Functional control screen

• 7 inch colorful touch screen.
• Status: Watertemperature, pressure/current/pump/running curve/history curve
• Timer: Weekly timer
• Error: Error history check
• User: Local control/BMS control

PLC design

PLC programmable controller improve the reaction speed and reliability.