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  1. Replies
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    Sorry, this is not a DIY site. Thread closed.

    Sorry, this is not a DIY site.

    Thread closed.
  2. Replies
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    Okay, now that you listed several of the possible...

    Okay, now that you listed several of the possible reasons he didn't doesn't talk to you.

    Other than you don't believe he would have listened to you. What good reason do you have for not warning...
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    Safe, yes. Efficient, not really.

    Safe, yes.

    Efficient, not really.
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    OBL uses an ECM blower motor. OVL uses a VS...

    OBL uses an ECM blower motor.

    OVL uses a VS ECM blower motor.

    Both are furnaces are rated at .5 static.
  5. How evasive varies with the house. If a tech...

    How evasive varies with the house.

    If a tech evaluates a system just by checking refrigerant pressures, he really isn't checking properly. Needs to go by SC and SH. He should also check actual air...
  6. Like many things in new construction. The actual...

    Like many things in new construction. The actual HVAC job was subbed out to an HVAC sub contractor. Probably the lowest bidding one. So yes the duct work could be that bad. And often is.

    Depending...
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    The RTU the OP is working on. Has 2-7.5 ton...

    The RTU the OP is working on. Has 2-7.5 ton circuits/compressors.

    When the Rawal valve is maintaining the evap pressure/saturation. The compressor is not working as hard as it would if it was...
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    Moved to AOP.

    Moved to AOP.
  9. Way back in the 70s. It was all pipe dope around...

    Way back in the 70s. It was all pipe dope around here. Didn't hear of thread sealant being used on pipes until the mid to late 80s.
  10. https://static.grainger.com/rp/s/is/image/Grainger...

    https://static.grainger.com/rp/s/is/image/Grainger/39AT51_AS01?$mdmain$
  11. Its suppose to be R and CH1 for a heat call. ...

    Its suppose to be R and CH1 for a heat call.

    May have blown a fuse on the zone panel. It should have its own separate transformer.
  12. I virtually never use dope on them. Dope is just...

    I virtually never use dope on them. Dope is just to over come friction. On a small plug like that, none is needed.
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    In the Pro forums, we have a Business and...

    In the Pro forums, we have a Business and Marketing forum. Its a good place for these types of discussions.

    You should apply for Pro membership. Takes being a business owner and 30 post to apply...
  14. The garage and guest house/area by code may not...

    The garage and guest house/area by code may not be conditioned by the same forced air system.
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    Sounds like the problem is your system has a leak...

    Sounds like the problem is your system has a leak and none of the companies that sent someone out are interested in finding it, and repairing it.
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    Spray some dish soap on the joints the second...

    Spray some dish soap on the joints the second company questions.

    Nitrogen leak check would be best to be done by installing company. So that down the road, they can't say other company messed...
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    What size is the existing heating and cooling...

    What size is the existing heating and cooling system.
  18. Replies
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    Probably over heated the TXV, or the bulb while...

    Probably over heated the TXV, or the bulb while it was dangling in the air.
  19. Can't say for sure. But probably at least once...

    Can't say for sure. But probably at least once every 30 days at min.
  20. Replies
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    It has a 10 year warranty to the person that...

    It has a 10 year warranty to the person that first had it installed. It won't carry over to you.

    PS: Pricing questions are not allowed.
  21. That wold depend on how often the air filter is...

    That wold depend on how often the air filter is changed.
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    Moved to AOP.

    Moved to AOP.
  23. Cooling has a different speed than fan only.

    Cooling has a different speed than fan only.
  24. https://hvac-talk.com/vbb/showthread.php?1241-Welc...

    https://hvac-talk.com/vbb/showthread.php?1241-Welcome-to-HVAC-Talk!-Please-read-these-rules

    2. Do-It-Yourself (DIY) - not here.

    This site is for industry professionals and folks seeking HVAC/R...
  25. 120 PSIG is not an indication of a problem on a...

    120 PSIG is not an indication of a problem on a R410A unit.
  26. No its not.

    No its not.
  27. Replies
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    For you K may be better. But the majority of us...

    For you K may be better. But the majority of us use Fahrenheit. So to help us help you. If you can convert to F you can get much better answers.

    Good chance the condenser coil is not as clean as...
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    Ah. Have you cleaned the condenser coil? ...

    Ah.

    Have you cleaned the condenser coil?

    What was the suction pressure?
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    Ambient air temp of 113F, you should have a much...

    Ambient air temp of 113F, you should have a much much higher discharge pressure. In the range of 500 PSIG.
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    Its used in a lot of applications that don't have...

    Its used in a lot of applications that don't have hot gas bypass/hot gas defrost.
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    Do you use temp set back to save electric? If you...

    Do you use temp set back to save electric? If you do, that is probably at least part of the problem. Because when it recovers from temp set back, it uses the electric aux heat to recover, using far...
  32. VS blower motor moduless have a governor in them.

    VS blower motor moduless have a governor in them.
  33. Could cause the duct to sweat on the outside of...

    Could cause the duct to sweat on the outside of its insulation.
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    Whats your min outdoor air setting at? Might need...

    Whats your min outdoor air setting at? Might need to set it to a min of 50%.

    Are you sure the old Trane wasn't a 12.5 ton, and that someone didn't read the 150 as being 15 tons instead of...
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    Butterfly damper. Any device added to a...

    Butterfly damper.

    Any device added to a system will have a pressure drop, causing a higher static for the blower to work against.
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    Dual fuel would be worth it at the rates you...

    Dual fuel would be worth it at the rates you posted. Specially since you have solar panels also.
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    Moved to AOP.

    Moved to AOP.
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    Moved to AOP.

    Moved to AOP.
  39. Moved to AOP.

    Moved to AOP.
  40. Your system is removing very little moisture in...

    Your system is removing very little moisture in second stage. So it could be that the charge is not correct. The TXV is not functioning correctly, the blower is still moving too much air, a defect in...
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    Comfort Bridge only uses single stage inputs. It...

    Comfort Bridge only uses single stage inputs. It controls the staging of both heating and cooling.
  42. Replies
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    Run the nitrogen in through the vapor line/side.

    Run the nitrogen in through the vapor line/side.
  43. Probably using the service clearance the...

    Probably using the service clearance the manufacturer recommends. Which is often 3 foot/36 inches.

    Ask them if instead of moving the fence on to the patio. If putting a gate in the service area...
  44. Does Bosch actually recommend locking it out.

    Does Bosch actually recommend locking it out.
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    Balance port/hard shut off TXVs should and do...

    Balance port/hard shut off TXVs should and do restrict nitrogen flow.
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    Sounds like its 6 tons over sized. An spray foam...

    Sounds like its 6 tons over sized. An spray foam encapsulated house should be closer to 1000 sq ft, or more per ton.

    The Infinity zoning system will help but not solve your humidity issue.
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    Does the cave have a constant air flow moving...

    Does the cave have a constant air flow moving through it.
  48. Or he could have just leak checked it, found the...

    Or he could have just leak checked it, found the leak and then recharged it.

    I doubt that it is a metering device problem.
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    He said residential A/C. A 100% ODA unit is not a...

    He said residential A/C. A 100% ODA unit is not a residential A/C.
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    High Velocity systems can do more than 26...

    High Velocity systems can do more than 26 degrees. Keep in mind they only move around 200 CFM per ton though.

    On a conventional system, you would need very low humidity to get more then 26 degrees...
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