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  1. Replies
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    R-value79 I completely feel for you man . I...

    R-value79

    I completely feel for you man . I was I a similar predicament. For what its worth : Knowing what I know now, I would ask to partner with an experienced tech that has good teaching...
  2. Thread: Oils

    by techreptdh
    Replies
    10
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    723

    Thanks, I appreciate the response.

    Thanks, I appreciate the response.
  3. Thread: Oils

    by techreptdh
    Replies
    10
    Views
    723

    Oils

    I have a question regarding poe oils.
    I know that time is critical when handling these oils.
    But is there any guidelines available as to exposure and such.
    I ask because I recently worked with a...
  4. Replies
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    Point taken........and please, not the boo boo...

    Point taken........and please, not the boo boo face:gah:
  5. Replies
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    2,285

    So then you can't go around saying a "ton" of...

    So then you can't go around saying a "ton" of cooling was added to a space due to all the variables that need to be accounted for, is that correct?
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    No, I don't think he's using a figure of speech....

    No, I don't think he's using a figure of speech. And he's not trying to impress me. He's used that expression in this instance a few times and I just thought it wasn't quite right. I'm not going...
  7. Replies
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    You make an excellent point.

    You make an excellent point.
  8. Replies
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    2,285

    Sorry about the above post error I was trying to...

    Sorry about the above post error I was trying to combine 2 quotes and I haven't learned that nifty little trick.
    Any how when I apply the formula to my situation the btuh comes to 8208 since I am...
  9. Replies
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    400 CFM wouldn't be unusual for a commercial app....

    400 CFM wouldn't be unusual for a commercial app. A 10" or 12" rd. Sensible heat BTUH=1.08 x CFM x Delta T.Like said, you'd neNot incorrect when you break down the formula... A "ton" is 12k btu.. so...
  10. Replies
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    I guess I should have mentioned that this is an...

    I guess I should have mentioned that this is an office bldg so it would naturally be a commercial application.
    But answer me this then, what if you start delivering the same cfm (400) of say 65 or...
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    Cfm question

    I have a quick question.
    My boss likes to say he added about a 'ton' of air conditioning (400 cfm of 55 degree air) to a space, via opening a damper on a vav box.
    Is that correct terminology, just...
  12. Thread: RTU

    by techreptdh
    Replies
    27
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    2,473

    Yes its true that the sheaves should be replaced,...

    Yes its true that the sheaves should be replaced, but it's not always done. I guess due to cost. I will put the fixed sheaves on after the v/p sheaves wear out, especially where multi-groove sheaves...
  13. Thread: RTU

    by techreptdh
    Replies
    27
    Views
    2,473

    It's hard to say how long belts should last,...

    It's hard to say how long belts should last, mainly because of conditions as some have mentioned. But if the alignment is true and the sheave and pulley is not worn you should be able to get a year...
  14. Thread: Megging!

    by techreptdh
    Replies
    26
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    2,416

    Well, as I mentioned in my post I didn't know for...

    Well, as I mentioned in my post I didn't know for sure if damage could be done.
    Our engineer was one who thought the insulation could be broken down. Its good to get as many knowledgable thoughts as...
  15. Thread: Megging!

    by techreptdh
    Replies
    26
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    2,416

    Glad you asked. The majority feel theres more...

    Glad you asked.

    The majority feel theres more harm than good. Windings take a beating during the process. Don't know if its true.
  16. Thread: Megging!

    by techreptdh
    Replies
    26
    Views
    2,416

    Megging!

    Hi All,

    I was wondering what the thoughts are on doing a megger check on your compressors as a P/M procedure. We're having mixed opinions at our shop.
    What do you all feel about this?

    Please...
  17. Replies
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    I always thought the poly filters did a better...

    I always thought the poly filters did a better job. It seemed like more work to me however and I often replaced them with pleats only due to the convenience in changing them.
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    more about belts

    Hey everyone,
    I have multiple size belts on a variety of units at my facility. Most are quality gates or browning. Most are the cogged variety. I guess my question is how long can I expect to get on...
  19. Thread: Vav filters

    by techreptdh
    Replies
    13
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    1,778

    I appreciate the comments.I brought the question...

    I appreciate the comments.I brought the question up because we recently had a visit by a team of experts hired by the real estate co. that owns our facilty. Their goal was to find and recommend ways...
  20. Thread: Vav filters

    by techreptdh
    Replies
    13
    Views
    1,778

    Let me add these boxes have electric reheat, and...

    Let me add these boxes have electric reheat, and of course they are filtered through the AHU.
  21. Thread: Vav filters

    by techreptdh
    Replies
    13
    Views
    1,778

    Vav filters

    Anybody have thoughts on changing filters in fan powered vav boxes? If this has been discussed before post the thread please.
  22. Replies
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    552

    Green building

    Does anyone know if Green buildings have certain setpoint requirements or parameters for zone thermostats ? If so where can I find this information. Reason I ask is, somewhere along the line I heard...
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    654

    Additional info

    In regards to the above posting , there are two pneumatically controlled butterfly valves in this setup. From what I understand, when the chiller is running in the heat recovery mode the primary 4...
  24. Replies
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    Chiller baffled!

    Could someone help me to understand the point of this. Here goes: We have two McQuay heat recovery chillers HSC079. On both units , the leaving condensor water lines start off 10 inches then reduces...
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    I need to know this too!

    I hope I'm not intruding here but I have a very similar question. I hope Aircooled gets back soon!
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