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  1. Replies
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    Just this week we suggested de-commissioning a...

    Just this week we suggested de-commissioning a 1958 vintage Carrier 5H60 R-12 belt drive. The building has been vacant for several years and quite naturally anything copper has been re-purposed.

    J
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    Most of the correspondence (email etc) I am...

    Most of the correspondence (email etc) I am seeing is now Daikin branded....


    J
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    Mikey, take a peek at this. ...

    Mikey, take a peek at this.

    http://shop.panopticslighting.com/refrigeration-lighting.aspx

    and if strings is what you want:

    http://www.solidapollo.com/
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    deleted

    deleted
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    That is what I am thinking. The solutions while a...

    That is what I am thinking. The solutions while a pain in the a$$ may get you a usable space. Lift the unit off the curb and put 2 layers of 5/8" gypsum board wall to wall in the curb with a coating...
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    This is not an equipment issue as much as it is a...

    This is not an equipment issue as much as it is a building design issue. Architects are using lighter and lighter construction and HVAC designers, in many cases are, not able to place units away from...
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    It is already Daikin-McQuay. From what I am...

    It is already Daikin-McQuay. From what I am hearing the McQuay brand is being dropped entirely.
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    McQuay to be no more

    Hearing rumors from some pretty good sources that the McQuay brand will no longer exist in the US come the end of August. It will now be Daikin across the board, and I am assuming that with the...
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    Yes, but most all would be custom manufactured...

    Yes, but most all would be custom manufactured units. What CFM range are you looking for?


    J
  10. Replies
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    I believe the ASHRAE guidelines are 50 CFM/person...

    I believe the ASHRAE guidelines are 50 CFM/person for a smoking environment. As Motoguy mentions a central exhaust fan that ramps up in relation to an economizer damper position would be the way I...
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    You need to verify what the manufacturers MIN RPM...

    You need to verify what the manufacturers MIN RPM is for lubrication. If I remember correctly on a hermetic it will be about 1100 RPM. I know for a fact the old Carrier 5 Line open compressors had...
  12. Thread: Hospital IAQ

    by Jarreau
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    772

    The independent studies I have seen, especially...

    The independent studies I have seen, especially from the guys at St. Jude, focus more on filtration and dilution. They do however recommend uVc for cooling coils, drain pans and for inlet side of...
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    Try Miren Browser (in the app store free) J

    Try Miren Browser (in the app store free)

    J
  14. Poll: Interesting concept. There is already an Office...

    Interesting concept. There is already an Office Suite available ( http://www.libreoffice.org ) which includes a very nice database program.

    J
  15. Replies
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    The comfort level and evenness of the temperature...

    The comfort level and evenness of the temperature is the same. My filters have been loading more quickly which makes me wonder how much crap was getting stuck in stud space return.

    J
  16. Replies
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    In my area, one word, leakage. Too many joints...

    In my area, one word, leakage. Too many joints for the puzzle fitters to properly install. If properly thought out a central return on a single story home is just as effective as a return in every...
  17. Replies
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    Their website has been weird all day, growing...

    Their website has been weird all day, growing pains,

    http:www.nest.com

    I found the connections at one point, now can't seem to locate.
  18. Thread: Google

    by Jarreau
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    I've had no problem with ANY of my Google...

    I've had no problem with ANY of my Google services....

    J
  19. Replies
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    Nest Thermostat - from the iPod designers

    I'll give it a 10 on the coolness factor scale

    http://www.engadget.com/2011/10/25/ipod-fathers-unveil-their-next-project-the-nest-learning-thermo/
    ...
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    sorry JP, I am trying to watch that. J

    sorry JP, I am trying to watch that.

    J
  21. Replies
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    100 gallons in what time period? If that is flow...

    100 gallons in what time period? If that is flow in gallons per minute, then use this formula:

    Total Heat (BTU/hr) = 500 x GPM x ∆t (water)

    J
  22. Replies
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    There is no difference in the compressors between...

    There is no difference in the compressors between the DD and BD models, just the drive system. There is/was a different oil sump for the Transicold refrigeration compressors used in buses, ships etc....
  23. Thread: makeup air

    by Jarreau
    Replies
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    3,350

    You could do the duty with an Aaon 100% MUA,...

    You could do the duty with an Aaon 100% MUA, takes more than 12½ Tons, this is an 18 ton unit

    RN-018-3-0-EB09-000 Cooling Section
    Total Capacity: 210.39 MBH
    Sensible Capacity: 110.55 MBH
    ...
  24. Replies
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    If you can see the bulb, any part of the bulb,...

    If you can see the bulb, any part of the bulb, from any angle then I would say you have a problem. If it is reflected tracer light (uVc is not visible) then maybe you're OK.

    J
  25. Replies
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    300', WOW !! One of the problems here is...

    300', WOW !!

    One of the problems here is exactly how much extra charge is going to be required and what that is going to do to the compressor. In line lengths such as this the size of the liquid...
  26. Replies
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    Exposure hazard is very simple. uVc is EXTREMELY...

    Exposure hazard is very simple. uVc is EXTREMELY hazardous to biological DNA. It will cause severe burns, massive damage to unprotected eye tissue and depending on the dosage cause squamous cell,...
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    We supply the recovery machines, the techs are...

    We supply the recovery machines, the techs are responsible for all of their other tools. That being said, if something happens and a tech is separated from all of his tools we do not expect him to...
  28. Replies
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    We have done some uVc installs on older AHU's and...

    We have done some uVc installs on older AHU's and measured the difference in pressure drop across the cooling coils as the nasties were "cleaned" out which translates directly to BHP savings. One can...
  29. High Pressure Drop For Example, a 5 ton System...

    High Pressure Drop

    For Example, a 5 ton System - R410a
    125°F Sat Condensing Temp - 10° sub-cooling
    45°F Sat Suction Temp - 10° superheat
    6 elbows
    75' line length or ~85' equivalent

    Properly...
  30. Replies
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    I would have to question where (physically) that...

    I would have to question where (physically) that one would put a uVc assembly in a ductless split fan coil.

    J
  31. Replies
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    I had one of these system in an apartment I...

    I had one of these system in an apartment I rented about 20 years ago. The trick is simple, the OUTPUT Btuh of the gas burner has got to match the heating load of the space (doesn't matter if it is a...
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    Try a post here in the Free BSD forum. BSD is the...

    Try a post here in the Free BSD forum. BSD is the Berkley Unix developed from the original Bell Labs code.

    If there is not support for this card or a newer equivalent, I would be surprised....
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    Dectron, Deschamps, Seresco all make pool units.

    Dectron, Deschamps, Seresco all make pool units.
  34. Replies
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    The 35BC box is not a VVT box, it is a true VAV...

    The 35BC box is not a VVT box, it is a true VAV box (6" inlet) with the old Carrier "system powered" controls.

    Just my $0.025, I'd change it out to a new box with a standalone analog electronic...
  35. Usually not a huge problem, as long as you're not...

    Usually not a huge problem, as long as you're not planning on running them underground.

    J
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    Hi Scott, welcome. While I have never done any...

    Hi Scott, welcome.

    While I have never done any actual "testing", the area I am in has an "epidemic" of non-insulated vertical closet type furnaces installed in the attic. Just from having lived...
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    Yes it does. Adding a de-superheater to a...

    Yes it does. Adding a de-superheater to a refrigerant circuit is equivalent to adding 15% more condenser capacity. Desuperheating lowers refrigerant temperature and pressure, reducing energy input to...
  38. For filters, there is no min.

    For filters, there is no min.
  39. Replies
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    Nope, no recirc there :)

    Nope, no recirc there :)
  40. Replies
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    Think about it this way, with a smaller furnace...

    Think about it this way, with a smaller furnace it will run longer and when you hit the extreme temperatures warm air circulating will always "feel" more comfortable than a unit cycling, even if the...
  41. Replies
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    HVAC Copper Theft

    I was watching the local news yesterday and they did a spot showing two enterprising folks ripping off condenser coils from some fairly large rooftop units. The video from the surveillance camera...
  42. This may work. You're going to have almost 8...

    This may work. You're going to have almost 8 gallons stored in the loop which given some time should heat up.

    Once you have a feel for what the loop temperature is going to be, to figure your...
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    absolutely ! J

    absolutely !

    J
  44. Check and be sure the fan is positioned correctly...

    Check and be sure the fan is positioned correctly within the fan shroud. An axial fan tends to spin its flow off the ends if not properly controlled and that could cause the problem you are having.
    ...
  45. Just so I understand, you are planning to leave...

    Just so I understand, you are planning to leave the tubing in the shipping coil and not laid out single layer in the box?

    J
  46. Replies
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    Take a read on the link in my post above.

    Take a read on the link in my post above.
  47. Replies
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    One other measurement to consider, if you're...

    One other measurement to consider, if you're reading 82° return air at the grille, try getting a reading in the blower compartment. If you are in fact drawing attic air you will see a difference,...
  48. Replies
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    You're not being singled out. This is typical in...

    You're not being singled out. This is typical in my dealings with any of the JCI companies lately (JCI, York, ETI etc.) They're too busy in meeting and conference calls to be bothered with...
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    TJP: You may want to take a look at this, lots...

    TJP:

    You may want to take a look at this, lots of good info for anyone designing or operating a Natatorium.

    http://www.serescodehumidifiers.com/engineers/indoor-pool-design/intro.php
  50. To reach 65° and 45% you would need ~43° leaving...

    To reach 65° and 45% you would need ~43° leaving air temp, which will be difficult to do if the Trane Intellipack is simply a stock machine. This type of application is doable but requires hardware...
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