What must every refrigerating system be protected by?
Is oil lighter than refrigerant?
What is the best method to determine a chiller’s normal charge for leak rate calculations? Use the charge stated on the equipment nameplate. Starting in 2019, what is the leak rate threshold for commercial refrigeration equipment with a full charge of 50 or more pounds of an HCFC refngerant?
Refrigerant should be removed from the condenser outlet if the condenser is below the receiver. In a building that has an air-cooled condenser on the roof and an evaporator on the first floor, recovery should begin from the liquid line entering the evaporator.
What is the first thing to do when a new system has been assembled (built up), and is ready for testing? Pressurize with an inert gas and leak check. You just studied 25 terms!
What is used to prevent refrigerant from migrating to the oil during periods of low ambient temperature?