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LG LMU540HV
- Thread starter spoon1g
- Start date
by gas and liquid, are you referring to the high an slow side service valves? im assuming this is a new system? precharged with nitrogen, and moisture free?
if so, strictly speaking you can evacuate from both if you like... provided you have the core removal tools, you can also remove the cores to even further speed the process.
but i would suggest you consult the installation documents that came with your unit, and follow those.
if so, strictly speaking you can evacuate from both if you like... provided you have the core removal tools, you can also remove the cores to even further speed the process.
but i would suggest you consult the installation documents that came with your unit, and follow those.
oh interesting. kinda like package units.
ill be honest here. i just got my refrigerant license for laughs, and so i can handle my home hvac without the ass rape. hopefully someone else will chime in with real expertise.
but...i would just pressure check with argon, let it sit for a few hours, and then confirm no leaks in your lineset/evaporator. after that, just evacuate with a micron gauge untill you get a satisfactory and STABLE vacuum. stable is the key word here. if your micron gauge creeps, you either have a POS micron gauge, or a leak, or moisture, or very dirty/contaminated hoses/ manifold etc etc etc.
a new system should have 0 moisture, so the entire evacuation should take very little time... even with a poor manifold and small lines, its not going to take more than an hour.
im sure you know something about hvac, else you would not be servicing the unit yourself... but you will just hook up the high and low to your manifold, and evacuate from the center.
if you are renting a vacuum pump... PLEASE get some new sparkly fresh oil... i used to rent pumps to work on car AC's and the oil is unbelievably disgusting. a quart of oil is like 18 bucks, you ac system is what... 2 3 grand?
a fresh clean oil will perform far better than the brown sludge bullshit you will find in an autozone vacuum pump.
