kurt s
14-01-2013, 04:06 PM
Ran into a walk in freezer that was originally R12.. It had a note about being converted to R-502. Than a more recent note saying its been converted to M079... the suction pressure is around 25psi and the freezer is holding around 18 - 20 degrees. I thought M079 was a replacement for R22 ??? should i try topping it off with M079? has anyone seen this before? Not sure what to do. They have been complaining it stops running and gets to warm sometimes but i think its just the setting on defrost timer. seems that refrigerant is low also... ???? any thoughts?