Results 1 to 11 of 11
  1. #1
    Join Date
    Oct 2011
    Posts
    14

    Commercial CU for Residential Application

    I would like to replace 10 standard residential CUs with 1 Mitsubishi City-Multi R-2 commercial CU on a residential application.

    It is a residential application with conditioned space of 10,000 sq ft.

    The power company has stated that we can change the residence to 3-phase power, and thus have the option to use the R-2 system.

    The perceived benefits would be increased space utilization and a simplified design. The perceived downside is backup in case of system failure and the issues of converting 3-phase power to single phase for equipment other than the mechanical system.

    Please let me know your comments.

  2. #2
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    17,911
    Quote Originally Posted by mwcasale View Post
    I would like to replace 10 standard residential CUs with 1 Mitsubishi City-Multi R-2 commercial CU on a residential application.

    It is a residential application with conditioned space of 10,000 sq ft.

    The power company has stated that we can change the residence to 3-phase power, and thus have the option to use the R-2 system.

    The perceived benefits would be increased space utilization and a simplified design. The perceived downside is backup in case of system failure and the issues of converting 3-phase power to single phase for equipment other than the mechanical system.

    Please let me know your comments.
    Are you a contractor, technician, or a builing owner?
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







  3. #3
    Join Date
    Apr 2012
    Location
    lexington, NC
    Posts
    32
    Converting 3 phase to single phase will not be hard as long as it is a 208/230 volt power supply. All I can say about the City Multi is to be sure your are commisioned and certified to install and service the equipment. If not sign up for the class from your local dealer.

  4. #4
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    17,911
    Don't make duplicate posts.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







  5. #5
    Join Date
    Oct 2011
    Posts
    14
    MEP systems designer for an architect

  6. #6
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,760
    Merged threads.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  7. #7
    Join Date
    Jun 2003
    Location
    Chicago, IL
    Posts
    4,345
    Usually 3 phase comes with a SIGNIFICANTLY higher service/meter charge.

  8. #8
    Join Date
    Jun 2001
    Location
    Moore, Oklahoma, United States
    Posts
    4,158
    Quote Originally Posted by craig1 View Post
    Usually 3 phase comes with a SIGNIFICANTLY higher service/meter charge.
    +1

    http://www.oge.com/residential-custo.../RateInfo.aspx

  9. #9
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    14,914
    To bad the S-series residential units don't come any larger than 48,000 btuh.
    If more government is the answer, then it's a really stupid question.

  10. #10
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,760
    Quote Originally Posted by mark beiser View Post
    To bad the S-series residential units don't come any larger than 48,000 btuh.
    2 or 3 of them would still be a cleaner install then 10 regular units.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  11. #11
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    17,911
    Quote Originally Posted by mwcasale View Post
    I would like to replace 10 standard residential CUs with 1 Mitsubishi City-Multi R-2 commercial CU on a residential application.

    Please let me know your comments.
    Well, 10 standard residential CUs would be feeding 10 standard indoor coils. I do not believe you can connect the Mitsu Multi to those coils.

    Now, can you design a system with the Multi condenser and 10 indoor heads? Sure. Anything else would be fraught with troubles, if you could get it to work at all.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event