On a reach in cooler is it wrong to have a condenser with a receiver? Thanks
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On a reach in cooler is it wrong to have a condenser with a receiver? Thanks
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Not a good combo. What's the model # of this unit.
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A refrigeration system using a capillary tube expansion device is, by definition, a critically charged system.Originally Posted by oldpizzaguy
A refrigeration system using a receiver is, by definition, not a critically charged system.
Attempting to apply a capillary tube on a system having a receiver is attempting a contradiction.
If we have data, lets look at data. If all we have are opinions, lets go with mine. Jim Barksdale, former Netscape CEO
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Normally no. Have seen some RIs with remote condensing units that has them, TXV set up though.
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According to nccer receivers are of little to no value with a fixed metering device. That gives me the impression that it wouldn't hurt anything but is pointless.
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A capillary tube cannot work properly with a receiver. Yes, you can get the system to cool, but that doesn't mean it's working right.
Here's a past thread which gets into more detail on the subject: http://hvac-talk.com/vbb/showthread....-tube-question
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Funny, I have several factory build systems that run from -60c to -150c with caps and receivers.
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Do you have any piping diagrams for these? It would be interesting to see what they're doing differently.
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Our ULT are cap tube and no receivers
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ULT. Different animal.
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Maybe he's talking about an HX. Kinda looks like a receiver.
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Expansion chamber...
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While that would be considered a receiver...technically, it's not exactly the type we were referring to.
Perhaps jimp is just having a bit of fun.
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Exactly.
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Thanks for the info guys. This has already been hacked together and getting it working was most important. Just putting off the replacement for a bit.
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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.
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One of the machines is a Virtis Ultra LE 25, has daul compressors with receivers and caps.
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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.
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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
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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.
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