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John Pastorello

Charging Residential Air Conditioning

Charging Residential Air Conditioning Different types of metering devices have different ways of charging. A Thermostatic Expansion Valve (TXV) is charged to the sub-cooling of the liquid line leaving the condenser. A fixed orifice is charged to the superheat of the suction line leaving the evaporator. To understand why this is, it requires an understanding …

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The Story of Refrigeration Technologies Part 2

  In this episode, Zack and Ralph Interview John in more detail about Refrigeration Technologies including Proper Coil Cleaning techniques. He describes the proper way to pre-rinse the coil with water and then how to create turbulence when applying coil cleaner through a pump type sprayer to maximize cleaning efficiency. John was the first to …

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The Story of Refrigeration Technologies Part 1

We think it’s important that you know who your buying your products from. In this recent interview, John talks about how Refrigeration Technologies was started. From a bench chemist to HVAC technician and back again. Out of frustration with leak detectors, John developed his first successful HVAC product Big Blu. Drawing from his 17 years’ …

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