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  1. Replies
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    Extech RF40 refractometer

    Extech RF40 refractometer
  2. Thread: Fresh-Air.

    by fxb80
    Replies
    22
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    1,417

    I don't know who 'Richard' is. Must be in the...

    I don't know who 'Richard' is. Must be in the central part of the state?
    I'm NorthWest. None of the cities here seem to take ventilation seriously.
    Never seen or heard of a job being turned down...
  3. Thread: Fresh-Air.

    by fxb80
    Replies
    22
    Views
    1,417

    The State of Arkansas has adopted the...

    The State of Arkansas has adopted the International Mechanical Code. So by law there must be ventilation air in non-residential buildings.
    Could be a dedicated OA system. More usually the HVAC...
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    592

    I have decided to not use the Adapter Board, so...

    I have decided to not use the Adapter Board, so there is no need to respond to this thread.
  5. Replies
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    UCCAH08A-A0E1013000003DD866DA1DC0

    UCCAH08A-A0E1013000003DD866DA1DC0
  6. Replies
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    592

    Trane VFD Run Relay Coil Voltage?

    We're adding controllers to a couple of new Trane UCCA air handlers. The air handlers are factory wired with sensors, switches, and a TR150 VFD. The factory low voltage wiring terminates on an...
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    Actual quote from "The Audacity of Hope" [pg....

    Actual quote from "The Audacity of Hope" [pg. 261]: "Of course, not all my conversations in immigrant communities follow this easy pattern. In the wake of 9/11, my meetings with Arab and Pakistani...
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    771

    Thanks, Reaper. The fix you posted worked for me,...

    Thanks, Reaper. The fix you posted worked for me, the jace and station have been restored.
  9. I work with a man who used to work maintenance at...

    I work with a man who used to work maintenance at a local factory. He says he was fined $600 by the EPA for venting R-12 from a car prior to recharging it. He was working on a co-worker's car, and he...
  10. Replies
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    Thanks for the response. I'll give it a try next...

    Thanks for the response. I'll give it a try next week and post results.
  11. Replies
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    771

    WEB-600E-O, connects in serial shell only

    I went to a job to do a little maintenance, adding two pump control points. The job has a WEB-600E-O. The station was up and running and looked ok at first. When I tried to put a Spyder into...
  12. Thread: Ethics policies

    by fxb80
    Replies
    17
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    2,027

    Some years ago, the maintenance manager of a...

    Some years ago, the maintenance manager of a large local factory was getting bids for plant maintenance.
    When my boss was doing the pre-bid site survey, the maintenance manager was going on to him...
  13. Thread: Ethics policies

    by fxb80
    Replies
    17
    Views
    2,027

    I'm staying here til they run me off. I've had...

    I'm staying here til they run me off. I've had the good fortune to work for two highly ethical companies in my career, thirteen years at the first and twenty years with the current one.
  14. Thread: Ethics policies

    by fxb80
    Replies
    17
    Views
    2,027

    We have an ethics policy, though it doesn't go by...

    We have an ethics policy, though it doesn't go by that exact name. Regarding ethics, our employee handbook lists the following as behavior that can result in dismissal:

    "Failure to perform...
  15. Replies
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    1,176

    I just looked at the Grainger catalog and it...

    I just looked at the Grainger catalog and it looks like what you want is a multi-function relay that can be configured as "interval delay". Don't have an actual parts number for you, that usually...
  16. Thread: Nu-22 vs R22

    by fxb80
    Replies
    5
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    2,221

    We changed a facility from R-22 to NU-22. ...

    We changed a facility from R-22 to NU-22.

    NU-22 has less capacity, the equipment will run longer. If equipment has less than normal airflow, the TXVs will need substantial adjustment, we ran out...
  17. I second this statement. 10 PSI supply to...

    I second this statement.

    10 PSI supply to return is pretty usual. Don't be surprised if you check a bunch of stuff only to find that everything is ok and you end up adding the pumps. Not saying...
  18. Replies
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    2,269

    2200 psi

    2200 psi
  19. Replies
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    34,004

    A link to the grand jury documentation, if anyone...

    A link to the grand jury documentation, if anyone is interested.

    http://www.npr.org/blogs/thetwo-way/2014/11/25/366507379/ferguson-docs-how-the-grand-jury-reached-a-decision
  20. Replies
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    5,764

    And, since freon molecules are larger than...

    And, since freon molecules are larger than nitrogen and oxygen we wouldn't have to top off the pressure as often, maybe never! Which refrigerant has the largest molecule? Could someone please do a...
  21. Replies
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    5,764

    Good article. Since moisture is bad for tires, if...

    Good article. Since moisture is bad for tires, if I have new tires mounted that will be nitrogen filled, I should ask for proof that the bead lubricant used is not water based or mixed with water, to...
  22. Replies
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    5,764

    From: ...

    From:

    http://www.getnitrogen.org/pdf/graham.pdf

    "I hope this helps clarify why O2 permeates faster through rubber than does N2 and a major aspect of why it is a good
    idea to significantly...
  23. Replies
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    51,094

    "The data is pretty solid," Casey says. "If you...

    "The data is pretty solid," Casey says. "If you look at the 100-year global temperature chart, you look at the steep drop-off we've had since 2007. It's the steepest drop in global temperatures in...
  24. Replies
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    3,015

    Glow coil resistor?

    Glow coil resistor?
  25. Thanks, that helps, bulb on the permanent suction...

    Thanks, that helps, bulb on the permanent suction line, I see it now.
  26. Heat Pump with only one refrigerant control (TXV)?

    There's an ad for an Emerson NXT series valve that states: "Bi-flow capability, allowing one valve to control the superheat in both cooling and heating modes for close-coupled or packaged heat pump...
  27. Select "Staged" on the pulldown for Seq1,2,or3 of...

    Select "Staged" on the pulldown for Seq1,2,or3 of the control loop output. That should permit the RIO output to show up if it is configured and not used somewhere else.
  28. Replies
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    4,979

    Should a woman who has an abortion be charged...

    Should a woman who has an abortion be charged with capital murder or some lesser charge?
  29. Replies
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    4,979

    I don't think things have changed with religion,...

    I don't think things have changed with religion, specifically Christians. Since emperor Constantine, third century AD, Christians have forced their beliefs on others by incorporating church law and...
  30. Replies
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    1,038

    We've been happy with this supplier. ...

    We've been happy with this supplier.

    http://www.wireguards.com/items/wirecage_thermostatguards.cfm?catID=90
  31. Replies
    5
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    1,084

    A BTU is the energy required to raise the...

    A BTU is the energy required to raise the temperature of one pound of water by one degree Fahrenheit at atmospheric pressure. Pounds of water, pounds of air, a pound is a pound. 2815 BTUH divided by...
  32. Replies
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    1,084

    Not my area of expertise, but... The room...

    Not my area of expertise, but...

    The room contains 60 lbs. of air. If the air were the only thing absorbing the heat, and assuming the device is rated 2815 BTU per hour, after one hour the room...
  33. Replies
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    1,321

    I'm assuming this AHU recirculates and is not...

    I'm assuming this AHU recirculates and is not 100%OA. If it were 100% OA then you would definitely control by OAT. A recirculation unit would be controlled by RAT if you can't do a space temp sensor....
  34. Replies
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    Some good reading I found. ...

    Some good reading I found.

    http://carbon.atomistry.com/decomposition_carbon_dioxide.html
  35. Firestat goes in the return air prior to the...

    Firestat goes in the return air prior to the introduction of outside air.
  36. Replies
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    1,199

    Microsoft Office Visio

    Microsoft Office Visio
  37. We've used NU-22B in a plant where the customer...

    We've used NU-22B in a plant where the customer specified it. On many of the smaller rooftop units there were no issues, but three bigger systems gave much trouble. And we had differing opinions from...
  38. What I have done is mark through the parts I'm...

    What I have done is mark through the parts I'm not willing to abide by, or make changes, initial everywhere there's a change, and get my boss to initial it.
  39. Replies
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    4,653

    I found out today that the MUAs are DX; AAON...

    I found out today that the MUAs are DX; AAON rooftop units with variable capacity Copeland scrolls and refrigerant reheat, so there is no issue of separate chilled water.

    What about dewpoint...
  40. Replies
    29
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    4,653

    I just did my first quick reading of the sequence...

    I just did my first quick reading of the sequence of operation. I'm on another project, but can't help looking at this chilled beam some just to get away from the other. You know, taking a break from...
  41. Replies
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    I also would interested to hear what experiences...

    I also would interested to hear what experiences others have had, since we will be installing an active chilled beam job over the winter. A project manager and technician are working on the details...
  42. Replies
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    1,314

    Thanks for the reference.

    Thanks for the reference.
  43. Replies
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    1,314

    Lon termination module or a resistor?

    Trane calls for a 120 Ohm resistor at the ends of Lon and Honeywell has termination modules. Is a resistor enough?

    What are you guys using?
  44. Thread: temporary heat

    by fxb80
    Replies
    20
    Views
    2,731

    It is possible to run equipment during...

    It is possible to run equipment during construction, with the only downside being added runtime.

    I know because we work for an owners' group that specifies equipment shall be used during...
  45. Thread: Resistors

    by fxb80
    Replies
    10
    Views
    1,444

    Honeywell part no. 4074EJM for economizer testing.

    Honeywell part no. 4074EJM for economizer testing.
  46. There's a Jace 700, but it isn't doing any smoke...

    There's a Jace 700, but it isn't doing any smoke control. We're using Spyders at the AHUs, but if they settle on having fan shutdown, which sounds likely from what the Fire Marshall is saying, that's...
  47. The PM got my written report this morning. I...

    The PM got my written report this morning. I spoke with him afterwards and he agreed the original configuration is suspect. He is consulting our engineer before speaking with the Fire Marshall. He...
  48. Replies
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    2,474

    The old fashioned, but effective, solution is...

    The old fashioned, but effective, solution is partitioning the fan sections.

    That is, of course, after you have ruled out obvious stuff like dirty condenser coils and bad capacitor.

    The...
  49. I'm in NW Arkansas. Worked many years in Central...

    I'm in NW Arkansas. Worked many years in Central Arkansas, and when I moved here it felt like I had gone back 10 years in time regarding code compliance and energy efficiency requirements, but part...
  50. Code enforcement is somewhat hit or miss here. If...

    Code enforcement is somewhat hit or miss here. If you get a reputation for doing work that looks good the inspectors give it a nod, they're pretty busy with getting the really crappy work redone.
    ...
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