Hi all been doing Air con for a few years but company i was with went down the pan.. 8(

have started with a new firm and have got to re commision a r404a cold room

just wanted to ask a few pointers as never even used 404a..

the room needs to be -18c and im hoping a sight glass is fitted..

after a good vac etc should i be able to just charge to a full sight glass to get room to -18c or is it gonna be a case of taking temps onto evap and compare to suction pressure/temp??

any help will be great help!!!