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  1. #14
    Join Date
    Jun 2001
    Location
    Louisville, KY
    Posts
    12,189
    Do you have a zoning system?
    Perhaps you should have read the instructions before calling.

  2. #15
    Join Date
    Aug 2002
    Location
    manitowoc wisconsin
    Posts
    4,943
    It's the coldest winter day you had this year & one stage of electric heat came on?You really need a new hobby other than watching your infinity control....problem solved!lol
    Take your time & do it right!

  3. #16
    Join Date
    Aug 2006
    Posts
    164
    Quote Originally Posted by jrbenny View Post
    Do you have a zoning system?
    Yes 4 zones (infinity zoning).

  4. #17
    Join Date
    Sep 2006
    Posts
    1,253
    jrbenny,

    Attached is page 25 of the Product Data sheet for the 25HNA9 that references the higher BTU output with higher AH CFM.
    Attached Images Attached Images

  5. #18
    Join Date
    Jun 2001
    Location
    Louisville, KY
    Posts
    12,189
    Quote Originally Posted by eberrong View Post
    Yes 4 zones (infinity zoning).
    That's why your airflow is so low. All zones were not calling. If they were, your airflow would have been higher.

    As a rule, the system will try to maintain 70% of 350/ton when configured for comfort mode. So, if on high stage, .7*350*5 = 1225 CFM. Your system had calculated a need for 1300 CFM.

    If you had strip heat only running, you would follow the airflow table on page 9 of the attached document. You need a maximum of 1050 CFM for 9KW. So, the heat pump airflow requirements will always be greater than strip heat requirements. You won't see a change in airflow when the control energizes a stage of strip heat.

    Read this document from cover to cover. It will help you understand your system. Let me know if you have any questions.
    Attached Images Attached Images
    Perhaps you should have read the instructions before calling.

  6. #19
    Join Date
    Aug 2006
    Posts
    164
    Quote Originally Posted by jrbenny View Post
    That's why your airflow is so low. All zones were not calling. If they were, your airflow would have been higher.

    As a rule, the system will try to maintain 70% of 350/ton when configured for comfort mode. So, if on high stage, .7*350*5 = 1225 CFM. Your system had calculated a need for 1300 CFM.

    If you had strip heat only running, you would follow the airflow table on page 9 of the attached document. You need a maximum of 1050 CFM for 9KW. So, the heat pump airflow requirements will always be greater than strip heat requirements. You won't see a change in airflow when the control energizes a stage of strip heat.

    Read this document from cover to cover. It will help you understand your system. Let me know if you have any questions.
    Thanks a lot! I will read it!

  7. #20
    Join Date
    May 2004
    Posts
    1,462
    d
    Last edited by plain spoken; 02-24-2007 at 10:52 PM.

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