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Type: Posts; User: techreptdh

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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
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    847

    Thanks, I appreciate the response.

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

    by techreptdh
    Replies
    10
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    847

    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...
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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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    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...
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    You make an excellent point.

    You make an excellent point.
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    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...
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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...
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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
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    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
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    2,721

    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
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    2,560

    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
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    2,560

    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
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    2,560

    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...
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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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    1,986

    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
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    1,986

    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
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    1,986

    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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    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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    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...
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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!
  26. Replies
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    I think facilities jobs are good because they are...

    I think facilities jobs are good because they are mostly steady hours.
    But I also think they are limiting. Dont get me wrong, I do facility work and I cant say I have a command on all the equipment...
  27. Thread: Air Balance

    by techreptdh
    Replies
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    1,802

    I hear what everyone is saying! One thing is...

    I hear what everyone is saying!
    One thing is certain, changes have been made and this thing is a mess.
    Original specs say this is supposed to be a 25 hp motor installed. Currently I have a 40hp...
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    To all you young guns

    Just a little unsolicited advice to anyone thats listening. Learn all you can in this field whenever you can. Don't ever put away your books. At 50+ years of age I'm just getting into aspects of this...
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    air flow issues

    I wonder ,has there been a thread that addresses air balancing ? If so please direct me there. Or at least to a site that can get me started.This is an aspect of our trade that I really want to get...
  30. Thread: Air Balance

    by techreptdh
    Replies
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    1,802

    One more thing!

    Just to add to my previous post to those listening.I think I may have to do a duct traverse, but I've never done one. In case you're wondering... this unit has a 40 hp motor rated at 1770 rpm. The...
  31. Thread: Air Balance

    by techreptdh
    Replies
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    1,802

    please add more to this thread!!!

    I'm really new to air balancing. I began a facility job a little over a year ago and want to get into this aspect of HVAC. Lately I've been trying to get my feet wet.Theres a ton I need to get up to...
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    amp reading revisited

    I checked the info all you guys gave on this post.
    Question? Do I use the pf in this calculation or not ?
    If so, my new adjusted amp is lower. Which would put me way over whats good.Correct?
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    Congrats Giants!!!

    You just won the chance to become New Englands next victims
  34. Replies
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    I know for certain that the power company...

    I know for certain that the power company fluctuates.These numbers are good. Thanks retired1 for the calculation. This is the type of information I'm looking for. Generally I know theres not a real...
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    techreptdh

    Point taken!
  36. Replies
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    FollettEngineer You bring up a good point. I may...

    FollettEngineer
    You bring up a good point. I may not have been fully loaded as this is a motor used on a constant volume AHU with a variable pitch sheave.No changes have been made to pitch diameter....
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    Amp readings

    Could someone tell me how to figure out how to find the correct amperage on three phase motor circuit if voltage doesnt match nameplate.
    For ex: I checked amps on a unit rated at 23.4amps / 460...
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    Thanks for the response. The unit is to be...

    Thanks for the response.
    The unit is to be emptied so a new drain line could be installed.
    The produce will be stored in a refer truck and put back in on Monday.
    Good to know leaving the unit run...
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    empty walkin

    Is it advisable to run a walkin with no load?
    The reason I ask is repairs will be done on a unit on a saturday.Will it cause problems to run it empty till monday?
  40. Thread: Pump seals

    by techreptdh
    Replies
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    1,669

    Yes All of the above. I really only started...

    Yes
    All of the above.
    I really only started getting into seal changeouts recently. Not fun!
  41. Thread: Pump seals

    by techreptdh
    Replies
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    1,669

    Pump seals

    Is there a site out there that I can get good info on the whats ,whys and hows of circulating pump seals? Not B&G they dont break anything down!
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    Noise and Drafts

    I need some thoughts on this.
    We have an air handler thats designed to deliver 30K cfm.
    But we're having problems with noise and drafts.
    We had to bypass our speed drive on this unit, so we're...
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    Trane/Honeywell

    All I know is ,GE should have succeeded in its takeover attempt on Honeywell in '91. They would have positioned themselves as world leader in this market IMHO.
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    Thanks for the info everyone!! techreptdh

    Thanks for the info everyone!!


    techreptdh
  45. Replies
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    Cool, thanks I'm gonna check it out! ...

    Cool, thanks I'm gonna check it out!

    techreptdh
  46. Replies
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    Hey Powell, I tried to get that info on...

    Hey Powell,
    I tried to get that info on copelands website today,couldn't find it.
    Do you happen to have the correct web address?
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    Pump down question

    Hello all,
    I don't know for sure if I can pump down and hold a charge in this condensing unit. Can you give me some help. Its a copeland water cooled model wswm-0200-tac-001 thanks.
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    Is this a trick question?

    Is this a trick question?
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    Sizing remodeled spaces

    Fellas,

    I could use some help on this simple problem. Office spaces in my complex is always being renovated with walls going up or coming down. Whatever the need may be.
    Is there a quick formula...
  50. Thread: Rses

    by techreptdh
    Replies
    12
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    724

    I agree RSES is worthwhile if your chapter is...

    I agree RSES is worthwhile if your chapter is active. The local seminars and monthly chapter meetings are usually informative. If the chapter isn't active it may be a tough sell. Fortunately our...
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