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Chiller units play a critical role in industrial cooling and commercial processes, ensuring proper temperature regulation for equipment, machinery, and facilities. To maintain peak performance and prevent operational issues, several key components of the chiller must always be running when the unit is in operation. This guide explains which components are essential to keep your chiller running smoothly and efficiently.

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Check That the Following Components Are Running When Your Chiller is Operating

To avoid any cooling issues, you should check that the following components are running properly before you operate your chiller unit.

1. The Compressor

The compressor is the most vital component of the chiller and should always be running when the unit is in operation. Its role is to compress the refrigerant, increasing its pressure and temperature. This enables the refrigerant to absorb heat as it passes through the evaporator and release that heat when it reaches the condenser.

Without the compressor running, the refrigerant cycle would stop, interrupting the cooling process. Many modern chillers feature variable-speed compressors that adjust according to cooling demand, but regardless of the type, the compressor must remain active to ensure continuous operation.

2. Condenser Fans (or Cooling Tower)

In air-cooled chillers, condenser fans must always be running to expel the heat absorbed by the refrigerant. These fans blow air across the condenser coils, cooling the refrigerant as it condenses into a liquid. For water-cooled chillers, a cooling tower serves this purpose, circulating water to remove heat.

If the condenser fans or cooling tower are not running, the system will fail to release heat, leading to overheating and potentially causing the chiller to shut down. This reduces the system’s cooling efficiency and can lead to serious damage over time.

3. Chiller Pumps

Chiller pumps are responsible for circulating chilled water or other cooling fluids throughout the system. The primary pump moves the chilled water through the evaporator, where it absorbs heat, and then returns it to the cooling load. In water-cooled systems, the condenser water pump is also crucial, moving water between the condenser and cooling tower to facilitate heat transfer.

Both pumps must always be running to maintain fluid circulation. If either pump stops, the system cannot effectively transfer heat, and the cooling process will be disrupted.

4. Control Systems

Chiller control systems, such as programmable logic controllers (PLC), should always be active to monitor and manage the system’s performance. These systems ensure the chiller runs according to demand, adjusting compressor speeds, fan operation, and pump activity as needed. Control systems also provide diagnostic tools and can alert operators to any issues or inefficiencies in real time.

Without the control system running, the chiller would be unable to adapt to varying conditions, which could lead to poor performance or equipment failure.

5. Refrigerant Circulation

Though not a mechanical part, refrigerant flow is essential and must always be maintained when the chiller is running. The refrigerant continuously absorbs and releases heat, enabling the chiller to perform its cooling function. Any interruption in refrigerant flow will halt the cooling process because it will not be able to absorb any more heat from the system.

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Upgrade Your Cooling System Today

For a chiller to operate effectively, the compressor, condenser fans (or cooling tower), pumps, control systems, and refrigerant circulation must always be running. Ensuring these components work properly is key to maintaining a stable cooling process and preventing costly repairs.

Here at Evolution Cooling, we are proud of our chiller unit servicing and repairs, helping your chiller unit stay in peak condition. If you think it’s time for an upgrade, browse our range of chiller units, or get in touch if you have any questions.