Harry Parker has been in the HVACR industry for more than 30 years and has been a trainer in the industry for some 27 years. Presently he is a freelance trainer. He may be reached at const_trainer@yahoo.com.

Refrigeration Defrost Control

Harry Parker

July 13, 2009

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When a refrigeration system is designed to maintain a product temperature at or below the freezing temperature of water, there will always be a necessity for the system evaporator to be defrosted at some sort of interval (due to the fact that air may contain large quantities of moisture).

On Demand Refrigerant Safety Classes A2L and A3 have a very low GWP, making them a strong, long-term solution for many HVACR applications. However, these refrigerants are classified as mildly flammable and highly flammable respectively. This flammability class raises safety and compliance concerns. This webinar will help you understand these classes, along with the opportunities these refrigerants can offer.

As the HVAC market continues to expand and Variable Refrigerant Flow (VRF) technologies continue to evolve, the demand for contractors with VRF expertise will only grow. This presentation provides thorough insight into the requirements, advantages and opportunities associated with specifying VRF systems and addresses the common misconceptions contractors may encounter in the field.

ACHRNEWS

2019 September 9

In this issue of The NEWS, we present the Residential Heating Showcase, featuring the latest heating equipment to hit residential HVAC. We also discuss developments in the tools and test instruments market.

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