Cooling System Maintenance

SKU: RVI-11475Duration: 20 Minutes

Cooling systems remove heat from building air in order to produce the desired temperatures and humidity levels in enclosed spaces. These electro-mechanical systems require routine inspections and maintenance to keep them functioning properly. This interactive online course covers how to inspect and maintain cooling system drive belts, and best practices for greasing bearings and cleaning of cooling system coils.

Course Details

Specs

Training Time: 20 minutes

Compatibility: Desktop, Tablet, Phone

Based on: Industry Standards and Best Practices

Languages: English

Learning Objectives

  • Describe how to inspect and maintain cooling system drive belts
  • Describe best practices for greasing bearings
  • Describe how regular cleaning of cooling system coils improves thermal energy transfer

Key Questions

The following key questions are answered in this module:

How do cooling systems operate?
Cooling systems remove heat from air-conditioned spaces by blowing building air through a cooling coil in the air handler.

What should drive belts be regularly inspected for?
Drive belts should be regularly inspected for proper tensioning, alignment, and signs of wear, all of which can cause belts to fail prematurely.

When should grease be added to motor bearings?
Grease should be added when the bearing is warm and the areas around the fittings on the bearing housing and zerk fitting are clean.

What are cooling coils filled with?
Cooling coils in air handlers are filled with cold liquid refrigerant or chilled water that absorbs heat energy from the air inside the building.

What should be done if the Delta T (the drop-in air temperature) is low?
If the Delta T is low, check the temperature of the fluid (refrigerant or chilled water) entering the cooling coil. If the entering fluid is not cold, this will reduce heat transfer and Delta T across the cooling coil.

Sample Video Transcript

Below is a transcript of the video sample provided for this module:

Cooling coils in air handlers are filled with cold liquid refrigerant or chilled water that absorbs heat energy from the air inside the building. The condenser coil that releases this heat to an external fluid (outside air or water) is filled with hot gas refrigerant. Cooling and condenser coils are typically made from copper, steel, or aluminum because these metals conduct heat readily. Keeping the coil surfaces clean is also critical to good heat transfer. A coil consists of several turns of metal tubing set into panels and covered with thin pieces of metal called “fins.” The fins increase the contact surface of the metal with the air, and therefore increase the heat transfer rate. Condenser and cooling coils should be inspected regularly to make sure that dust and dirt accumulation does not reduce thermal energy transfer across them. Besides reducing heat transfer, dust and dirt accumulation will decrease the airflow through and increase the pressure drop across a cooling coil, increasing fan energy consumption and reducing duct static pressure.
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