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Type: Posts; User: UltraLowTemp

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  1. Replies
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    I have seen the high Head Pressure with Hotshot,...

    I have seen the high Head Pressure with Hotshot, along with a slight loss of capacity. MP39 is my choice, never had a problem with it. This really comes down to Technician Preferance though.
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    My belief has always been, "if it ain't broke,...

    My belief has always been, "if it ain't broke, don't fix it". You said the box is holding temp, so why worry? But, if you are worried about the pressures, add an ounce or two and see what happens....
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    I am certain a flood of comments is to follow...

    I am certain a flood of comments is to follow regarding this question, but I would like to answer the question of "flood back" in the realm of the textbook statement. When Refrigeration is started...
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    Refrigeration can be a totally differant animal...

    Refrigeration can be a totally differant animal from HVAC. It may quack like a duck and look like a duck, but it's really a goose. I would also make room in the back of your truck for at least 5 more...
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    There were some OLD GE's that had a totally...

    There were some OLD GE's that had a totally differant Capacitor circuit. I have only seen one and I took a successful SWAG at it.
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    I have done this more times than I care to...

    I have done this more times than I care to remember, especially when the Supply House has a shortage of Capacitors.

    I did not know about the heat dissipation benefits of using "paralleled"...
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    I know this may come across to many as a silly...

    I know this may come across to many as a silly statement, but, I feel obligated to say it. Purging your Manifold and Hoses is the "right thing to do", but we seem to be nit-picking. When I hook up my...
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    Okay, but maybe its my application. When I use...

    Okay, but maybe its my application. When I use SB8 it is usually on copper that has an oil coating, which will smoke when heated at all. Drifting nitrogen removes air, oxygen, from the lines,...
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    Excuse the stubbornly dense but why don't you...

    Excuse the stubbornly dense but why don't you drift nitrogen with a Turbotorch? The purpose of nitrogen is to remove air from the tubing that would turn to carbon and collect inside the system when...
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    I worked on a few of these for Subways. Seemed...

    I worked on a few of these for Subways. Seemed like most of the repairs were on the Microwave side of it, Cap's, Diodes, Mag's, etc.
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    We use Bitzer's on our -50C Walk-Ins without...

    We use Bitzer's on our -50C Walk-Ins without issue. They seem to take a beating and keep ticking. I personally have not seen a problem with a Bitzer not liking liquid, but then again, given enough...
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    Ditto the half-hour comment.

    Ditto the half-hour comment.
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    Its actually not that hard. I've done a few of...

    Its actually not that hard. I've done a few of them without breaking a sweat. Just make sure you get the right ones when you talk to True.
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    Or your running R507 at -60C with a 24" of Hg...

    Or your running R507 at -60C with a 24" of Hg Suction.

    Anecdote: A wise old man was once asked what belonged in a refrigeration system. Thats obvious says the old man, refrigerant and oil. Oil his...
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    You need to start up a large Steam Boiler...

    You need to start up a large Steam Boiler s-l-o-w-l-y. Everyone can talk about thermal expansion and the by-products of combustion gases along cold cast-iron, but I would also be worried about the...
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    I generally keep (4) sets of Manifold Gauges....

    I generally keep (4) sets of Manifold Gauges. IMHO you cannot purge oil from hoses.

    Set 1: Mineral Oil Systems; R-22, R-12, etc.
    Set 2: POE/AB Systems: R-404a, R-134a, R-507, etc.
    Set...
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    I have (4) Production Freeze-Dryers and (1) Pilot...

    I have (4) Production Freeze-Dryers and (1) Pilot Freeze-Dryer at my plant and found a jug of 13b in a storage area. I did not know I was sitting on a gold mine.
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    I have quite a few of these at my plant. We try...

    I have quite a few of these at my plant. We try to avoid entering the Sealed System by ruling out everything else first. Is the Compressor running? Is the Compressor hot? Is the Condenser hot? etc....
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