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  1. Replies
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    Glow coil resistor?

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

    Thanks, that helps, bulb on the permanent suction line, I see it now.
  3. 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...
  4. 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.
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    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?
  6. Replies
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    1,806

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

    We've been happy with this supplier.

    http://www.wireguards.com/items/wirecage_thermostatguards.cfm?catID=90
  8. Replies
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    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...
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    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...
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    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....
  11. Replies
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    Some good reading I found. ...

    Some good reading I found.

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

    Firestat goes in the return air prior to the introduction of outside air.
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    Microsoft Office Visio

    Microsoft Office Visio
  14. 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...
  15. 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.
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    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...
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    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...
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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...
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    Thanks for the reference.

    Thanks for the reference.
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    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?
  21. Thread: temporary heat

    by fxb80
    Replies
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    1,346

    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...
  22. Thread: Resistors

    by fxb80
    Replies
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    728

    Honeywell part no. 4074EJM for economizer testing.

    Honeywell part no. 4074EJM for economizer testing.
  23. 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...
  24. 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...
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    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...
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