RS-44 (R424A) FIELD TRIAL AT LOBLAWS SUPERMARKET, CANADA In May 2001, R22 was replaced by RS-44 in a walk-in cooler at a store of the supermarket chain Loblaws located in Halifax, Novia Scotia, Canada. The system was operating on alkylbenzene oil and in the first instance no changes were made either to this lubricant or any of the hardware. Oil return was found to be good and the system operated perfectly satisfactorily on alkylbenzen

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