Hi

Apologies if this is in the wrong thread!

We have been asked to look at a walk in freezer operating on on R134A i have never been to look at a freezer running on R134A what sort of running pressures should i be looking for to get the freezer down to -18oC? Currently the freezer is only achieving around -8oC

Am i right in thinking the suction should be around 1psig?

Thanks in advance for any help