Recirculating chillers are cooling systems that provide precise temperature control as well as cooling below ambient temperature. To ensure the chiller is functioning as efficiently as possible and to minimize the risk of downtime, it is important to properly operate and maintain it. However, because every chiller installation has unique features, the conditions of the environment determine how often it should be inspected and serviced.

The recommended preventive maintenance period for chillers depends on several factors, including:

• The number of hours of operation per day and type of pump used.
• The environmental conditions and location of the chiller.
• The coolant used in the system.

The type of maintenance that should be performed includes:

• Cleaning the condenser fins.
• Coolant top off and flushing.
• Filter and strainer cleaning or replacement.
• Pump lubrication.

In addition to performing these tasks on a suitable routine basis, Woburn, Mass.-based thermal solution provider, Lytron, says a quick and easy weekly inspection should be performed in an effort to help boost chiller performance. However, the company cautions that all service and maintenance on a chiller should be performed by a qualified technician trained on the equipment.

A weekly chiller inspection should take less than five minutes and should check for coolant leaks, coolant level and discoloration in the reservoir, dust or debris accumulation on condenser coil fins and proper airflow.

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