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Type: Posts; User: rick (dfw)

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  1. Replies
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    861

    From your post, I assume that you are monitoring...

    From your post, I assume that you are monitoring your Fire Alarm system as well as your HVAC systems and possibly lighting and security systems all from one Building Automation System (BAS). As far...
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    8,795

    Glycol chilled water loop question

    If you are maintaining daily logs on your chillers and pumps, you will be able to see what the common operating pressures are for your chilled water loop.
    I don't think 65 psig is necessarily high....
  3. Replies
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    8,795

    If you are maintaining daily logs on your...

    If you are maintaining daily logs on your chillers and pumps, you will be able to see what the common operating pressures are for your chilled water loop.
    I don't think 65 psig is necessarily high....
  4. Replies
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    1,524

    Getting the most from a low budget PM

    I think $300 was close to the going "low bid" rate 8 to 10 years ago. And even then the "PM" was typically no more than a spit shine at best. This type of so-called "PM" generates a lot of...
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    product for drain pans

    Check out http://www.marishawn.com they make a product for drain pans that is unbeatable. They also make an epoxy coating for cooling towers etc.
  6. I would say that you should get three quotes from...

    I would say that you should get three quotes from reputable contractors. That should give you an idea of what your job will cost in your area.
    You may also check to see if you can do some things...
  7. Replies
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    584

    Dr. Bob

    It doesn't sound like their rep has a very good grip on chilled water air handlers. If the CHW valve is barely opened and the fan continually moving air over the coil, yes I agree, you would expect...
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    1,044

    I've thought about the same thing but have not...

    I've thought about the same thing but have not done so as of yet. I have worked on test chambers that were designed to maintain a constant discharge air temperature. And of course VAV air handlers...
  9. Replies
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    2,254

    Have you ever thought about buying a cheap media...

    Have you ever thought about buying a cheap media blaster set up, pulling the pans and media blasting them clean? Fast, effective, and easy.
  10. Replies
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    1,141

    There should be more refrigerant in the receiver...

    There should be more refrigerant in the receiver during the warm summer temperatures and more refrigerant in the condenser during the cold winter temperatures. I'm sure fan cycling or staging will...
  11. Replies
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    1,470

    nothin beats a good ole sawzall...he he he. Just...

    nothin beats a good ole sawzall...he he he. Just kidding!
  12. Replies
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    1,089

    Thanks everyone. We've never had problems with...

    Thanks everyone. We've never had problems with excessive purge time. I was speaking with someone recently and it made me wonder about this. Just covering myself a little in case some new rule might...
  13. Replies
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    1,089

    Is there an EPA requirement to pressurize and...

    Is there an EPA requirement to pressurize and leak test low pressure chillers on an annual or any other periodic bases?
  14. Replies
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    1,015

    They make labels that can be placed on piping...

    They make labels that can be placed on piping using springs that wrap around the pipe and attach to the sign. If you don't want to go that route, I would call the manufacturer of the paint (lagging)...
  15. Replies
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    For a 45 F box temp the cut-in would be 76# and...

    For a 45 F box temp the cut-in would be 76# and cut-out somewhere around 35-38#. However, 45 F seems higher than health department specs.
  16. I can't find any info on the web about the Trane...

    I can't find any info on the web about the Trane model you are replacing. From the title of your post I see that your unit is water cooled. But I don't know if this is a chilled water system or not....
  17. Replies
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    1,253

    In addition to the above recomendations, check...

    In addition to the above recomendations, check and see if the LL solenoid will de-energize when you put the unit into defrost, and if the unit will pump down and shut off on the LP switch.
  18. Replies
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    1,616

    Maybe you should try them in a less expensive...

    Maybe you should try them in a less expensive application like a pump motor starter and see how well they hold up before using them on the expensive stuff.
  19. The Ice machine units I've seen with this set up...

    The Ice machine units I've seen with this set up have had only one condenser fan. I wouldn't be supprised if the unit
    "Icehouse" is describing only had one fan as well. However, "W.Coast refer man"...
  20. I've seen the same set up on Cornelius ice...

    I've seen the same set up on Cornelius ice machines but I never looked into why they did that. My guess is,if there is not a relay located in the indoor section of the I/M to shut off the fan during...
  21. Replies
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    seems to me I only paid around $200.00 a few...

    seems to me I only paid around $200.00 a few years ago for the canisters. I no longer take care of any Nortec units but I think when I did I got my parts from Texas Air Systems, Inc. There phone # is...
  22. Thread: amp draw

    by rick (dfw)
    Replies
    28
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    3,656

    I would call the manufacturer and explain your...

    I would call the manufacturer and explain your concerns and see what they have to say about it.
  23. Thread: amp draw

    by rick (dfw)
    Replies
    28
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    3,656

    Just some things to check, Are the 5 amps you are...

    Just some things to check, Are the 5 amps you are refering to for just the condensing unit (possibly 5a) or the entire refrigerator section, ie, condensing unit, evaporator fan, condensate pan heater...
  24. Replies
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    I'm in the Dallas area and used to get JC parts...

    I'm in the Dallas area and used to get JC parts from "Temperature Controls" but I don't know if they are in your area or not (where ever that is). The best thing to do is to call around to supply...
  25. Replies
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    There's a good chance the compressor may be good....

    There's a good chance the compressor may be good. But because of the questions you are asking, I'm not sure you should be checking this unit out yourself. I recommend you call a professional repair...
  26. Although you could be short of refrigerant,...

    Although you could be short of refrigerant, another likely possibility would be a restriction at the expansion valve.
    Let us know what you find.
  27. Replies
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    1,666

    Call some of the manufacturers. Some, like Forma...

    Call some of the manufacturers. Some, like Forma & Revco (makers of ultra-low boxes for medical environments) used to give schools on their cold products.
    Thermotron has week long schools on their...
  28. Replies
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    1,447

    Have you tried using an expansion valve in stead...

    Have you tried using an expansion valve in stead of a cap tube on this unit? That's probably the direction I'd recommend. I'm also a little curious to know what discharge temperature your running...
  29. Replies
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    4,083

    I would find the local Trane parts house and ask...

    I would find the local Trane parts house and ask them for an Operation and Maintenance manual. As far as your control board,if this unit is a Voyager, I have found some problems dissapear (especially...
  30. Replies
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    1,571

    Greatest accomplishment: finally finding a job in...

    Greatest accomplishment: finally finding a job in this industry I really enjoy.
  31. Replies
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    789

    Unless your storing ice cream (-15 F), typical...

    Unless your storing ice cream (-15 F), typical W/I freezers used in fast food are kept between 0-5 degrees F with a warm alarm between 15-20 degrees F.

    In my experience W/I Coolers can vary alot...
  32. Replies
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    1,227

    I'm wondering if this chiller set up you are...

    I'm wondering if this chiller set up you are describing has a high pressure switch for each circuit. And if so, are they set to trip below the rating of the relief valve as well as below the rating...
  33. Replies
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    2,641

    Check the contacts on the contactor, they may be...

    Check the contacts on the contactor, they may be pitted causing intermittent unbalanced voltage.
  34. Replies
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    1,191

    Just my thoughts

    I'm no air balancing expert by any means but typically what I've seen is, out door air dampers & return air dampers linked in such a way that when one is closing the other is opening and vice versa....
  35. Replies
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    3,461

    condenser flood back system charge

    Remove the existing refrigerant & weigh in a new refrigerant charge using the manufacturers' specs. Condenser flood back systems must have the correct amount of refrigerant or their reliability will...
  36. Thread: Maintenance

    by rick (dfw)
    Replies
    2
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    786

    I agree with Dave, the biggest part of...

    I agree with Dave, the biggest part of maintenance is keeping the unit clean. On a basic W/I cooler I would recommend the following.


    On the Cooling Coil:

    Cleaning the fins,...
  37. Replies
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    1,706

    I've also used pan pads and have had very good...

    I've also used pan pads and have had very good success. You can get them through a Carrier (Total Line) parts house. They are kind of expensive, ranging from $20-40 depending on the tonnage of the...
  38. Replies
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    942

    I'm looking for a formula for calculating actual...

    I'm looking for a formula for calculating actual gpm of water flowing through the chiller barrel. Any help would be appreciated.

    Thanks,

    Rick
  39. Replies
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    2,618

    You may want to check with your local Trane...

    You may want to check with your local Trane office, they have a course titled " Non Technical View of A/C" that might help.
  40. Thread: Pipe sizing

    by rick (dfw)
    Replies
    4
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    1,189

    In short, to prevent pressure drop

    Don't know if your talking about a remote condenser, but assuming so, I would say the 3/8 line would offer less chance for pressure drop between the receiver and expansion valve than a 1/4 inch line....
  41. Replies
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    Don't know if this will help but I've run into a...

    Don't know if this will help but I've run into a few coolers in the past where the one fan was pulling air while the other/s where blowing air, creating a bypass situation where little or no air...
  42. Replies
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    condenser flood back system charging

    Ace,

    In a case where you are dealing with a TXV system with condenser flood back controls,ie, units with headmasters or the equivelent, it is best to charge by weight. Charging by clearing the...
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