Chiller Operator Interview Questions and Answers

There are various types of compressors used in chillers, including reciprocating, scroll, screw, and centrifugal compressors.

• Reciprocating compressors use a piston and cylinder to compress refrigerant gas.

• Scroll compressors use two spiral-shaped scrolls to compress refrigerant gas.

• Screw compressors use two interlocking helical rotors to compress refrigerant gas.

• Centrifugal compressors use centrifugal force to compress refrigerant gas.

There are two main types of chillers: air-cooled and water-cooled.

• Air-cooled chillers use air to remove heat from the refrigerant, while water-cooled chillers use water.

• Air-cooled chillers are typically used in smaller applications, while water-cooled chillers are used in larger applications.

• Examples of air-cooled chillers include rooftop units and portable units, while examples of water-cooled chillers include centrifugal chillers and absorption chillers.

To start a chiller, ensure power supply, check water flow, set temperature and turn on the chiller.

• Check power supply and ensure it is connected

• Check water flow and ensure it is sufficient

• Set the desired temperature on the chiller control panel

• Turn on the chiller and monitor for any issues

• Adjust settings as necessary to maintain desired temperature

Chilled water in let pressure is the pressure of the water entering the chiller.

• It is important to monitor the chilled water in let pressure to ensure the chiller is operating efficiently.

• Low pressure can indicate a problem with the system, such as a leak or clogged filter.

• High pressure can also indicate a problem, such as a malfunctioning valve or pump.

• Typical chilled water in let pressure ranges from 40-60 psi.

• Regular maintenance and monitoring can help prevent issues with ...read more