You could always completely fill up the receiver and make it act like a critically charged system again, or probably better yet, just remove the receiver.
Filling the reciever will make for interesting start up. Remove reciever and install cap tube drier or some other access for highside. In the 80's I serviced an ice bank bulk tank with captubes and recievers. The recievers were due to length of evap. tubes. Thus large volume of refrigerant required to flood
One of the machines is a Virtis Ultra LE 25, has daul compressors with receivers and caps.
Cooling multiple loops (shelf/condenser/neg. shelf) at different times during the run, sometimes more than one loop. Varying loads - a small receiver helps reduce the time spent pushing vapor through the cap tubes... This is what I've always assumed.
Of course, anyone doing Ultra Low temp long enough knows that some of the normal rules get ignored.
You could always completely fill up the receiver and make it act like a critically charged system again, or probably better yet, just remove the receiver.
Originally Posted by ETC1
Filling the receiver will make for interesting start up.
Since the refrigerant in a cap tube system will tend to migrate to the coldest spot...,ie the evaporator...adding a receiver full of liquid to the mix can cause some very severe floodback on startup.
Most of the units where I've found them receivers installed with cap tubes had 1-2 year old compressors with bad valves. I'm surprised those little guys lasted as long as they did.
The shelf compressor only cools the shelf, it has two caps. One cap is for cooling, one is for when the recipe calls for no cooling. The condenser compressor cools the condenser of course, unless the switch is off. If the shelf is on and the condenser switch is off the condenser compressor still runs and supports the shelf cooling.
Originally Posted by icemeister
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