Air Source Screw Water Chiller Unit – Installation Operation and Maintenance Manual
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improper refrigerants will lead to unit failure or even compressor scrap.
Use the lubricant brand defined in the technical specifications when maintaining or charging lubricants.
Do not attempt to introduce oxygen to the supplying line of the unit because oxygen can react violently
with oil.
The operating pressure of the unit must not exceed the specified maximum working pressure.
Use only refrigerants or dry nitrogen to chase leaks of the unit.
Do not use electric soldering or flame to cut any refrigerant loops or components unless the unit
contains no gas or liquid refrigerants.
Refrigerants in contact with open fire will produce toxic gas. Appropriate measures must be taken to
protect the unit and fire extinguishers must be accessible.
Wear safety glasses to protect skin or eyes from refrigerants. Flush the refrigerants on skin
immediately with soap or water if any. Flush the refrigerants in eyes with water immediately and
repeatedly and seek medical attention.
Use warm water rather than open fire or steam to heat the refrigerant container. Otherwise, the
pressure may be too high, presenting potential hazards.
Do not attempt to remove any end caps of joints when the unit is under certain pressure or in operation.
Before performing operations on valves that may communicate with air after being opened, confirm
that no pressure exists within the unit.
When corrosion, foreign matter, dust, stain, or fouling is found within the valves, or the mechanical
structure of the valves is damaged, replace the valves immediately instead of attempting to repair or
respecify any safety devices.