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I have never seen a factory condensing unit use a receiver with a cap tube system. How about you get us some model numbers and we do some investigating ? Or might you be seeing cap tubes coming from a distributor ?Originally Posted by mike1020
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Depends on how the TXV sits relative to the condensor, and what the capacity is. Plenty of low charge systems have no reciever. Like someone mentioned earlier, many AC's don't have recievers. As long as there is a good supply of liquid refrigerant consistantly between the TXV and the condenser, it will still function well.
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No receiver with a TXV metering device in any refrigeration system means cheap manufacture practice. In order to make one unit what will last longer and in the same time be efficient , best practice is an external equalizer type of TXV and oversized receiver/ accumulator. Then the job improvement will achieve optimal performances for any kind of loads, because of the constant very low SH without flooding the compressor. Also you will be able to make the system working better with high ambient temperatures and low loads without worry for any compressor failures.
Do not forget, that the manufacture's goal is cheap is possible, and the chances that the technicians who worked with the unit before you has limited knowledge and practices are huge!
Always think how to improve , not just how to fix.
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It does have a receiver.....082S Ernie Parmell and Jimmy White,only a couple of guys here will get that.
FEN
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How is this any different than almost every ice machine? They use a txv and have no receiver? Used on remotes, water Cooled and self contained air cooled?
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Ernie was one smart dude!
I only met Jimmy once or twice in the late 80’s, seems like a lifetime ago.
R I P Icemeister
Supporting our Vet’s
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Skid....I dislike that word... Lol
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come across many traulsen cabinets with a txv without a receiver., never seen a cap tube and a receiver set up (factory)
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Didn't read all the responses so may be repeating, but the receiver is only necessary for a system with a varying ambient temp surrounding the condenser. IE, outdoor condensing unit. Receiver used to store the flooded charge (during summer) which is required for running the unit in the winter using a head maser or ORI/ORD set up to achieve a constant head/liquid line pressure to maintain the pressure drop across the TXV, regardless of ambient temp year round.
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Thread is over two years old.
Yet I feel myself getting pulled in too!
The thread is on indoor self contained units. So headmasters doesn't really apply.
Indoor units also sometimes need receivers. Not for flooding charges, but for systems with multiple evaporators. The receiver holds the extra refrigerant when some units aren't calling.
I don't think NOT having a receiver automatically means a unit is cheaply manufactured. Bottom line is if the system needs storage for extra refrigerant then it will probably have a receiver.
Most prep tables that have independent base refrigerator and wrapped cold rails (on a single system) will have a receiver so that when one section is cycled off, the refrigerant has somewhere to go.
If it doesn't need a receiver (like on Traulsen units that don't have one), then putting one on does nothing other than add potential leak points and increase the cost of the unit.
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Ah, didn't think of the multi evap pump down scenario, good call. - Also, good call on realizing this is a thread that has risen from the dead, didn't notice the dates, hah.Thread is over two years old.
Yet I feel myself getting pulled in too!
The thread is on indoor self contained units. So headmasters doesn't really apply.
Indoor units also sometimes need receivers. Not for flooding charges, but for systems with multiple evaporators. The receiver holds the extra refrigerant when some units aren't calling.
I don't think NOT having a receiver automatically means a unit is cheaply manufactured. Bottom line is if the system needs storage for extra refrigerant then it will probably have a receiver.
Most prep tables that have independent base refrigerator and wrapped cold rails (on a single system) will have a receiver so that when one section is cycled off, the refrigerant has somewhere to go.
If it doesn't need a receiver (like on Traulsen units that don't have one), then putting one on does nothing other than add potential leak points and increase the cost of the unit.
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if no receiver, verify txv superheat and charge to subcooling.
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You joined in 2010, this is your first post, and you decided to bring this two year old thread back from the dead?
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Its all good
I've done the same thing, searching and reading through the archives, it'd easy to forget the age of thread and make a post! Especially on a topic I might be passionate about!!
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I was just surprised that he somewhat insinuated that Traulsen was cheap crap.Its all good
I've done the same thing, searching and reading through the archives, it'd easy to forget the age of thread and make a post! Especially on a topic I might be passionate about!!
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I’m currently working on a Beverage Air back bar beer cooler. It was a cap tube system last time I worked on it. Flash ahead a few years. There is a tx valve inside the cooler next to the evap.
This condenser has no receiver after it. Where is the extra refrigerant going to sit when the TX valve starts to throttle back? It’s taking half of the condenser coil surface area away. The compressor isn’t meant to start under load and it’s killing overloads. New compressor after some of our guys replaced the hard start 4 times in a month.
I understand A/C systems have tx valves and no receivers. I thought that some engineers oversized the condenser coil and matched a high torque starting compressor. This would eliminate the need for a receiver.
My cooler is now wrecked. I have to install a receiver and a self equalizing tx valve before we kill another compressor.
If it’s got a cap tube, it’s not as simple as slamming in a tx valve and feeding as much liquid as you need. The rest of the system wasn’t designed for this.
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