hey guys was doing a pm at a new store today, they have a walk in with 2 condensing units and 1 evap per unit.. One of the units used to be a walk in freezer and was converted to a cooler.. they changed the gas and that looks to be it.. Forgot to check the txv for numbers.. Is converting a unit that ran r 502 to r 507 the way to go?? this unit seems way oversized for even the freezer application.. The unit has 1 3/8 in suction and 1/2 liquid line feeding the coil.. The coil wasnt re wired, so the fans shut off and heaters come on in defrost..
Never done a change over like that and just seemed out of the ordinary to use the heaters and kill the fans.. Not sure how that pump is running and if the suction gas is keeping it cool enough or if this pump is running out side it envelope, and if 507 is a good change..
condensing unit is a hussmann
evap numbers i cant read
compressor is copeland