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  1. Replies
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    On R410A If your temp is 100 into LLFD and 95...

    On R410A

    If your temp is 100 into LLFD and 95 on the outlet side

    You have a 21 PSIG drop
  2. Prices removed as we don't talk prices. Made...

    Prices removed as we don't talk prices.

    Made this its own thread.
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    If you have a 5 degree temp drop across the...

    If you have a 5 degree temp drop across the filter drier. Its very restricted. Needs to be changed out. Recover, change out LLFD, vacuum and weigh charge back in.
  4. Might also want to confirm that the 3 ton...

    Might also want to confirm that the 3 ton condenser is connected to the second and third floor air handler and the 2 ton to the first floor air handler. Wouldn't be the first time installers...
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    I haven't worked on a system with that stat yet....

    I haven't worked on a system with that stat yet. So I won't be much help. Trane/American Standard have that made special for them, or make it themselves, I forget which. So its functions methods are...
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    The 50 amp breaker was not the cause. ...

    The 50 amp breaker was not the cause.

    Something in the condenser caused the over heating. Whether it was a loose wire connection, the condenser fan motor, or the compressor, can't say from here. ...
  7. Is the second floor as big as the first floor....

    Is the second floor as big as the first floor. How big is the third floor.
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    With stabilized system(15 minutes of run time),...

    With stabilized system(15 minutes of run time), and home near conditioned temp, within 10 degrees of SH.
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    So what was the liquid line temp/SC. Is the...

    So what was the liquid line temp/SC. Is the condenser coil clean?

    May still be slightly under charged.
  10. Conventional air handler.

    Conventional air handler.
  11. Mitsubishihttps://www.ecomfort.com/products-image/...

    Mitsubishihttps://www.ecomfort.com/products-image/360/mass_96636_600.jpg
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    I don't think that basic model has CPH settings.

    I don't think that basic model has CPH settings.
  13. Are you sure you can't use a ducted mini split?

    Are you sure you can't use a ducted mini split?
  14. Sounds like a water source heat pump. Lots of...

    Sounds like a water source heat pump. Lots of them around here in offices and hotels.

    OP, how do you know that the rest of the building that they don't change over to your units won't need 180...
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    The furnace/air handler will move the same amount...

    The furnace/air handler will move the same amount of air, whether the higher static is in the supply or return. So operation will be the same.
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    http://www.refrigerants.com/technical_literature.a...

    http://www.refrigerants.com/technical_literature.aspx
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    It is when its due to improper sizing. Or not...

    It is when its due to improper sizing. Or not having set up the system or thermostat correctly.

    510, If you have the install manual for your thermostats, see what the CPH is set to, if set higher...
  18. Sounds like the static was checked in first stage...

    Sounds like the static was checked in first stage instead of second stage.

    Could be that the charge is not correct anymore, from a possible leak. Call the installer.
  19. Stop resetting the breaker, your only hurting the...

    Stop resetting the breaker, your only hurting the system more. Making changing out the compressor less feasible.
  20. Replies
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    .5" is where it meets the efficiency rating. Not...

    .5" is where it meets the efficiency rating. Not the max it can work at.

    Unless your blower is a VS ECM blower, when you lower the return static, the supply static will increase.
  21. ECM and VS ECM motors have power/line voltage to...

    ECM and VS ECM motors have power/line voltage to them as long as the furnace has power to it.

    The motor not running could just as easoly be the motor is defective/broken as it could be a board...
  22. Thread: Return air

    by beenthere
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    Don't know what you mean.

    Don't know what you mean.
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    So on the coldest nights your old furnace never...

    So on the coldest nights your old furnace never shut off, just ran 24/7.
  24. Thread: Return air

    by beenthere
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    Are the supplies high or low?

    Are the supplies high or low?
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    Since you said remodel instead of addition,...

    Since you said remodel instead of addition, doubtful you really needed the larger furnace.
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    As said, window units have very small coils for...

    As said, window units have very small coils for their capacity.

    And mini splits have SEER ratings well into the twenties.
  27. Have a contractor find out what is wrong for...

    Have a contractor find out what is wrong for sure, and if its the motor, let him replace it. He will be able to decide if the blades also need changed out or not.
  28. Replies
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    Did you change out the LLFD.

    Did you change out the LLFD.
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    There are some units the inside board controls...

    There are some units the inside board controls the outside unit. Many don't though.
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    Moved to AOP. Sorry, this is not a DIY site. ...

    Moved to AOP.

    Sorry, this is not a DIY site.

    Thread closed.
  31. Thats a 4 ton condenser.

    Thats a 4 ton condenser.
  32. Replies
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    Even though the compressor reduces its capacity....

    Even though the compressor reduces its capacity. The condenser coil and evap coils are still coild sized for the second stage capacity. So they are slightly warmer than when in second stage, and...
  33. Did the tech shut the power off to the indoor...

    Did the tech shut the power off to the indoor unit before he changed the dip switch.
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    Moved to AOP.

    Moved to AOP.
  35. Sounds like waiting for the guy your dad uses, is...

    Sounds like waiting for the guy your dad uses, is your best option.
  36. Depends on the throw of the supply registers.

    Depends on the throw of the supply registers.
  37. If the refrigerant charge is not correct, or the...

    If the refrigerant charge is not correct, or the air flow set too high, you can have a much higher RH in the home than outside.

    Some of the moisture comes from you/the occupants directly, some...
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    The air may have been converted to R22 when it...

    The air may have been converted to R22 when it was originally installed. Have your tech check the metering device.
  39. Its modulating down to maintain house temp./ Yes...

    Its modulating down to maintain house temp./ Yes the board can be set to the lower suction temp to increase capacity.
  40. Backflow preventer leaves water out when system...

    Backflow preventer leaves water out when system water pressure is higher than the supply water line pressure.

    Dirt or debris can cause it to leak water out
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    Not normal. Needs checked by a good tech.

    Not normal. Needs checked by a good tech.
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    Try for correct CFM first. 2 stage units...

    Try for correct CFM first.

    2 stage units don't remove as much moisture in first stage as a single stage would in the same capacity as that first stage.

    Which is another reason why over sized 2...
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    Yes, most homes have under sized ducts for their...

    Yes, most homes have under sized ducts for their current sized A/C. What size A/C do you have now, and why is it being up sized.
  44. Use the link in my sig, and follow the...

    Use the link in my sig, and follow the instructions to apply for Pro membership.

    Don't forget to also apply for your * if you want to help home owners in the AOP forums.

    The Pro forums are...
  45. No problem. I believe vstech thought you were in...

    No problem. I believe vstech thought you were in the trade. We he said that.
  46. Tech to Tech is for tradesmen, not home owners....

    Tech to Tech is for tradesmen, not home owners. So I removed the one in Tech to Tech.
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    With a TXV. Whether its cool inside or warm, the...

    With a TXV. Whether its cool inside or warm, the SH should be the same.

    Is there a LLFD outside of the cabinet, if so, it may need changed.
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    Most Home Warranty Companies will tell you what...

    Most Home Warranty Companies will tell you what they will pay you.
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    Moved to AOP.

    Moved to AOP.
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    Your unit is probably over sized for the house...

    Your unit is probably over sized for the house already. So finishing the basement won't require increasing its size.

    However, a basement's needs even when finished is never the same as the first...
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