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  1. One part of the design of the MAU is to make the...

    One part of the design of the MAU is to make the hallway positive to control offensive odors from cross contaminating other condos.
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    Call a contractor that is certified with the...

    Call a contractor that is certified with the Bryant Evolution or Carrier Infinity system. They will know how to test this and resolve.
  3. Did AHS pay for the indoor unit install? How long...

    Did AHS pay for the indoor unit install? How long ago was the Coleman unit installed?
  4. It's time to hire a professional to assess the...

    It's time to hire a professional to assess the entire system and explain how it operates. The best anyone on this forum can do is offer educated guesses based n your descriptions. The downfall is...
  5. If you are thinking of changing the design you...

    If you are thinking of changing the design you will need engineer designed drawings and permits pulled. Keep in mind the building and each HVAC system in the individual unit are designed for certain...
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    When a change is made on the app there is a...

    When a change is made on the app there is a certain amount of lag before the UI gets the command. If someone, or the program, changes settings at the UI during this lag, the app change will be...
  7. In short it seems like it is. That furnace...

    In short it seems like it is.

    That furnace setup is not unusual at all for the time it was installed. If the airflow is low as suspected, temp rise was probably used to set the manifold pressure...
  8. What is the length, width, height of each room? ...

    What is the length, width, height of each room?

    What is temp at ceiling near that unit in your picture? Your contractor needs to collect some performance data to determine if there is an issue.
  9. Were the copper lines replaced? Are they sized...

    Were the copper lines replaced? Are they sized properly for a 5-ton unit? Sounds like it's partly vibration noise from line-set touching structure. The rest is refrigerant movement and could be...
  10. There are fittings and duct design strategies...

    There are fittings and duct design strategies that can be used to reduce TEL of the duct system. I would start with Man J & S to see if that furnace is sized properly for the house. Maybe the duct...
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    The answer to your question is no. The VS...

    The answer to your question is no.

    The VS blower compensates if there is a static pressure change through the furnace. Carrier can increase airflow by 10% for bypass humidifiers if necessary, but...
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    What you are trying to do is system and house...

    What you are trying to do is system and house specific. Now that there are some details someone familiar with the I-Comfort control may be able to help you. If this were a Carrier/Bryant system I...
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    Head over to heatinghelp.com and see if there is...

    Head over to heatinghelp.com and see if there is someone close to you. The only way I know to achieve what you want is placing a sensor in the kitchen slab and have it control a mixing valve to keep...
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    What manufacturer and which control are you using?

    What manufacturer and which control are you using?
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    No, Carrier does not have provisions for this on...

    No, Carrier does not have provisions for this on their furnaces. I do not know of any residential furnaces that do. It is easier on a non-communicating system, but is not difficult for a skilled...
  16. That unit uses a rotary compressor. It has...

    That unit uses a rotary compressor. It has tighter operational limits than the 280ANV.
  17. A fan powered may fit on the 15" riser your coil...

    A fan powered may fit on the 15" riser your coil is mounted on. A couple pictures of your furnace may help us help you.
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    What's the model number of the Reznor unit? How...

    What's the model number of the Reznor unit? How much airflow was measured, and what is temperature rise? Post pics of unit install and duct system.
  19. Is the gas valve failed? If so, have it replaced...

    Is the gas valve failed? If so, have it replaced under warranty and have them correct the installation.

    If not, clean everything up and have the installation corrected. Since it has been a few...
  20. Your Carrier / Bryant Dealer is the best source...

    Your Carrier / Bryant Dealer is the best source of information for he changes you want to make. There's are no wireless sensors for these systems. The thermistors are 10k ohm ntc.
  21. The vent connections and the drain are not...

    The vent connections and the drain are not installed as shown in the installation manual.
  22. First, that furnace is not installed correctly....

    First, that furnace is not installed correctly. Tell your installer to read the install manual carefully.

    The issue with the corosion is a known issue with any manufacturer's furnace installed...
  23. Permanent fix has been in production for 3 years...

    Permanent fix has been in production for 3 years or more.
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    Is the indoor unit in a laundry room?

    Is the indoor unit in a laundry room?
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    It is not unusual for new RTUs to smoke when they...

    It is not unusual for new RTUs to smoke when they are started. There is residual lubricant used in the manufacturing process, plus dust if they were stored in warehouses, that must be burned off. The...
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    Correct. You need someone with knowledge of duct...

    Correct. You need someone with knowledge of duct work and furnace sizing to properly correct this.
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    The duct system is way too small for that...

    The duct system is way too small for that furnace. Have someone with knowledge of duct systems and furnaces diagnose and design a solution.
  28. Sorry. Typo. Meant to say as direct as possible.

    Sorry. Typo. Meant to say as direct as possible.
  29. With the proposed plan it will be even warmer...

    With the proposed plan it will be even warmer upstairs. The runs need to be sized properly and run a set direct as possible.

    Hire a professional that understands duct design and airflow to make...
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    This is very unusual to require a lower cooling...

    This is very unusual to require a lower cooling set-point than heating. There are no control systems other than custom programmed DDC systems that can do this. They would look at outdoor temp in the...
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    If you are concerned with controlling fan speed...

    If you are concerned with controlling fan speed for circulation, as well as, enhanced dehumidification, the Observer is the best option for that furnace. As mentioned you at least need the 2nd stage...
  32. 1 - No 2 - Sort-of. New one will require some...

    1 - No
    2 - Sort-of. New one will require some configuration.
  33. Equipment is oversized and it sounds like the...

    Equipment is oversized and it sounds like the dampers are not air tight.

    Are they Carrier Infinity Dampers?
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    It's been a few years, but the odd number outdoor...

    It's been a few years, but the odd number outdoor units - 25, 37, 49 - Can achieve E Star with the proper indoor components. The even models cannot.
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    The 37 is energy star certified. The 36 is not....

    The 37 is energy star certified. The 36 is not. Should have same capacity, the 36 uses slightly more energy to get there. The 36 was introduced first so it is not a newer model
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    For aesthetics it should be level. A crafty...

    For aesthetics it should be level. A crafty installer can get it close without leaving an unusual gap
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    Contact the person that installed the domestic...

    Contact the person that installed the domestic water heater to troubleshoot.
  38. Can you show pictures of the mass dampeners?

    Can you show pictures of the mass dampeners?
  39. Your local contractor would be a great resource...

    Your local contractor would be a great resource to make certain the ducts are sized an installed correctly for proper airflow.
  40. Yes, but it needs to be filtered.

    Yes, but it needs to be filtered.
  41. It might be covered in the AC install manual.

    It might be covered in the AC install manual.
  42. The units need to be installed on a solid base....

    The units need to be installed on a solid base. From your description the sound is more likely the lineset touching a structural member of the house.

    If you are talking about the vapor line...
  43. Please post pictures of the furnace and water...

    Please post pictures of the furnace and water heater showing the venting.
  44. The air in the ducts will cool rapidly in the...

    The air in the ducts will cool rapidly in the attic that is the same temperature as outside. You are correct that there will be condensation in the ducts. This is a bad idea.

    HW = Hot Water.
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    Brand names are typically regional. Used because...

    Brand names are typically regional. Used because they are popular in those areas. There are areas Bryant is not offered, but Day & Night is.

    Airquest is owned by ICP, which is owned by United...
  46. Depending on the system, you will lose functions...

    Depending on the system, you will lose functions with the Cor. Definitely dehumidification will suffer. Get the Infinity Touch. You gain the use of the phone app and do not lose functionality.
  47. Or they now know why all the little furnaces they...

    Or they now know why all the little furnaces they install have limit trip issues and they all joined to learn more. :cheers:
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    Depending on construction it can be more...

    Depending on construction it can be more challenging and might require chases and soffits inside the home. Ask about having under the roof deck spray foamed. This would put the ducts inside the...
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    197 - 253. The 10% is calculated from 230 volt....

    197 - 253. The 10% is calculated from 230 volt. Post a picture of the unit label. That is typically on there.
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    If you are in contact with the distributor ask...

    If you are in contact with the distributor ask for a recommendation for a new contractor. Also ask for a labor concession if there is a leak in the manufacturer’s equipment.

    From what you...
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