compact screw oil carry over

[Tycho]

Liquid overfeed system with gravity flooded evaporator.

No, it's not "liquid over feed" because liquid overfeed would mean that liquid was pumped to the system from a low pressure drum. what you have is a DX (direct expansion system) where you have hand regulated the liquid feed valve so you can keep a steady level in the surge drum.

I have to give you kudos since you have been able to keep a steady level in the sure drum at 30% as I can see from the from the condensation on the surge drum.


Really, the way this system should be controlled is by using the level valve, that should ask for liquid from the condenser/receicer when needed, and it should go through a heat exchanger that exchanger would return any oil back in the compressor suction to ensure that the oil stays in the compressor circuit.

The way your system is piped, you may end up with a evaporator (ice coil) that will be clogged by oil and you will have less ice prodction.

[l2embo]

Dear Tycho
We did not drain any oil from the oil drain valve while we were changing the compressor. We are assuming that oil stayed in the condenser. Or is it possible that oil is in surge drum and the siphon under it ?