These units feature a 70°F floating head pressure control valve and an integral subcooling circuit that allows saturated liquid to flow from the receiver to the condenser where the refrigerant is sub-cooled by ambient air.
This line for hydrocarbon (HC) refrigerant (R290/R600a) use includes electronic expansion valves (EEVs), thermostatic expansion valves (TXVs), reversing valves, check valves, ball valves, and solenoid valves.
Bob and Tim are on a service call on a really cold and blustery day. The temperature is 27°F, the wind is blowing, and it’s snowing and sleeting. When the customer called, she said that their home is getting cool inside, and their heat pump is running all the time with the temperature dropping inside the house. They arrived at the front door, talked to the homeowner, and decided to look around. They went to the closet where the indoor unit for the heat pump was located and determined that the heat pump itself was not running, only the fan and strip heat.
ASHRAE, with the consensus of the American National Standards Institute (ANSI), has designated Bluon Energy’s TdX 20 refrigerant as an approved standard to refrigerant blends under Standard 34-2013. TdX 20 has been given the designation of R-458A.
Ultrasonic sensor measures and documents refrigerant-to-oil ratio
February 1, 2016
SensoTech’s LiquiSonic® analyzer allows for precision measurement of oil concentration in refrigerant to ensure the optimum ratio of oil and refrigerant. According to SensoTech, the LiquiSonic sensors use ultrasonic technology to continuously and directly measure the oil concentration.
The revised OSHA Hazard Communication Standard now incorporates portions of the Globally Harmonized System of Classification and Labeling of Chemicals, which, according to OSHA, will benefit workers at more than 5 million workplaces in the U.S. by reducing confusion about chemical hazards, facilitating safety training, and improving knowledge of the hazards, especially for low-literacy workers.
The Air Conditioning Contractors of America (ACCA) recently published its latest ComforTool. The latest series installment, “Why is the Price of R-22 Refrigerant So High?” explains why the price of the R-22 refrigerant recently increased and what may happen in the future.