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  1. Replies
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    Originally posted by mccool [B]Alco or...

    [QUOTE]Originally posted by mccool
    [B]Alco or Sporlan? "Headmaster" is Alco so chances of valve failure is quadruple.


    What a great line! Two thoughts, first if it is a self contained unit...
  2. Gas charged powerheads are used to limit the...

    Gas charged powerheads are used to limit the opening of the TEV based on pressure. Usually there is no extra cost for this feature, but the pressure limit be be applied properly with the specific...
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    Originally posted by gerryboy00 [B]when...

    [QUOTE]Originally posted by gerryboy00
    [B]when i am talking to a hvac tech. im talking "Tons" and operating pressure.

    when i am talking to a reefer tech. im talking HP. and coils temperature. ...
  4. It depends on the expansion valve type...

    It depends on the expansion valve type (specifically the thermostatic charge)as to whether a problem could occur. "Gas Charged" pressure limiting power heads are susceptible to "charge migration"; a...
  5. danny x, I'm not picking on you (and I did...

    danny x,

    I'm not picking on you (and I did read your P.S.)so please don't take this the wrong way, but I completely disagree. This is the refrigeration board and while superheat, subcooling, and...
  6. So, If I install a brand new HeatCraft...

    So, If I install a brand new HeatCraft condensing unit, etc with R-404a, its okay to leave the sight glass flashing?? Isn't R-404a is a blend? If so, then how do I know how much flashing is okay...
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    Originally posted by Dowadudda They go...

    [QUOTE]Originally posted by Dowadudda

    They go through everything. It's a good course for a guy just getting into supermarkets. But. You know it's all about their stuff to. Nothing wrong with...
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    You are missing the point. I'm no chemist, but...

    You are missing the point. I'm no chemist, but if you do a little research you'll find that if you nuetralize acid with a "base", the by-product formed is water. Every chemical action has a...
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    I've heard that Acid Away nuetralizes acid and...

    I've heard that Acid Away nuetralizes acid and the by-product formed is water. Doesn't sound like a very good idea to me. I just stick with the tried and true-Sporlan HH suction line filter driers.
  10. A Sporlan C charge is fine for this application. ...

    A Sporlan C charge is fine for this application. If the TEV is internally equalized (and it probably is for such a small load), then all the pressure drop form the high side to low side occurs acoss...
  11. Now I can visualize how this is piped; I think. ...

    Now I can visualize how this is piped; I think. The manufacturer put the equalized line at the bottom of the coil's collection header (I guess so it can log up with oil and trash) So, the installer...
  12. Its difficult to visualize what you mean by "the...

    Its difficult to visualize what you mean by "the bulb is mounted vertically with it". Please describe again.

    As far as mounting the bulb before or after the equalizer is concerned there are two...
  13. Replies
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    Typically, there will be something to identify...

    Typically, there will be something to identify each orifice for use with a specific refrigerant. So, if you know what refrigerant you're going to put in, then you know which orifice to use.
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    Andy may yet comment, but I think I can handle...

    Andy may yet comment, but I think I can handle this one for him. I found the talble showing the inrush and holding amps in Sporlan's bulletin 30-10. Mine shows 1.4 amps holding for the coil in...
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    Go to Sporlan's web site. Read their bulletin...

    Go to Sporlan's web site. Read their bulletin 20-10 when things slow down.
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    To keep it simple, orifice sizing is critical for...

    To keep it simple, orifice sizing is critical for good/equal distribution of refrigerant in coils that have more than one circuit. If the orifice is too big, equal distribution may not occur. This...
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    TB, The orifice is there to cause pressure...

    TB,

    The orifice is there to cause pressure drop, which flashes more of the liquid into vapor. This pressure drop is in no way harmful to the performance of the system. At the same time, this...
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    Those folks are wrong. First, every system with...

    Those folks are wrong. First, every system with a TEV requires 100% liquid in order for the TEV to provide it's rated capacity, and to have the best chance at delivering it's maximum performance. ...
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    Originally posted by lmtd [B]No, it is...

    [QUOTE]Originally posted by lmtd
    [B]No, it is NOT acceptable to mount the bulb vertical with the cap tube attached to it pointing down.

    I'll probably get flamed for this, but here it goes...
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    With all due respect, It is true that the CPR...

    With all due respect,

    It is true that the CPR valve is there to protect the compressor. It is also true that it will not protect against slugging.

    However, the way it protects the compressor...
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    I'm with icemeister and frosty-ne. A sight glass...

    I'm with icemeister and frosty-ne. A sight glass is absolutely essential for charging on a TEV system with a reciever whether its a refer system or an AC system.

    You can't expect full capacity...
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    I've been involved with one job so far, and it...

    I've been involved with one job so far, and it went fine. You'll have to do you own due diligence though. The compressors are relatively expensive, but very efficient and light weight/compact. ...
  23. Need more info. Refrig., evap temp., cond....

    Need more info.

    Refrig., evap temp., cond. temp. liq. temp., and is a refrigerant distributor used? Does the compressor unload, and if so, down to how many tons? I hope your liquid line isn't...
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    Drifter, I would expect your evap pressure to...

    Drifter,

    I would expect your evap pressure to run lower since effectively your evap has lost heat transfer area due to the oil logging. Also, you may or see a lower than normal superheat heat or...
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    I don't know of any suppliers that make a 1/4"...

    I don't know of any suppliers that make a 1/4" epr. Just to cover the bases though, its best to size an epr based on the normal criteria of refrigerant, tonnage, available pressure drop, etc, and...
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