Applying the odorant in R-290 systems with unknown compatibility with the compressor lubricant and construction materials may result in premature chemical or electrical failure and the degradation of the system efficiency. 
The Air-Conditioning, Heating, and Refrigeration Technology Institute undertook a research project to conduct experimental testing to evaluate odorants impact on system performance and odorants compatibility with refrigerant R-290, lubricants and other materials commonly used in HVACR equipment. This presentation provides an overview of the testing effort and summarizes the test results of R-290 and odorant in a mini-split heat pump and a commercial refrigerated display case (reach-in cooler). A brief summary of compatibility testing results of R-290 with two ...