Liquid Pump Low Dif

[Krohnie84]

I am not quite following. When the receiver reaches 50%, it feeds what?
I think we need a better description of your system.

This system has a charge of about 24,000 lbs give or take 500lbs.

I have six compressors.

Two are dedicated to med temp (Dock/cooler areas)

One dedicated to low temp

and three are able to swing between low and med temp.

The four that can run on the low side each have economizers.

I have four condensing units, one high pressure receiver, a vertical med temp vessel (where the issue is located) and a vertical low temp vessel.

As I understand it, the High pressure receiver will only feed into the med temp vessel when the liquid level in the receiver is at 50%. The feeding line has a hand expansion valve to regulate the flow of ammonia going to the med temp vessel. I have never had to mess with it besides a solenoid valve going to our purger.