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  1. #1
    Join Date
    Jun 2004
    Location
    EXIT 16W www.wmtandson.com
    Posts
    3,714

    Zoning a ROOFTOP

    Got a call from a old friend
    No thats a billy joel song.
    Well old Customer
    He,s renting space for his office,s
    Included in this space is a room 12x12 with Servers in it
    He,s asking me to cool down the server room 24/7 but the rest of the offices can be (warmer or off)
    My thought was to split the supply and add large returns in the server room
    Install 2 zone dampers and put a tstate in the server room which would always be calling at alower temp
    I,m open to suggestions or advice: I be stopping tomorrow for measurements etc to do a load calc on the space
    Space is prob 25 x70 and I,m thinking it has a 5 ton gas pack on the roof
    DON"T mess with the US
    I thought I had been there and done That.
    ITS ALL ABOUT LEARNIN!
    I thought it would be better by now
    "He who works with his hands is a laborer.
    He who works with his hands & his head is a craftsman.
    He who works with his hands, his head & his heart is an artist."
    ~St. Francis of Assisi

  2. #2
    Join Date
    Jul 2006
    Location
    Anytown USA
    Posts
    2,060
    so when its -2 outside and your server room still needs cooling but the other rooms are calling for heat, what are you going to come up with?

    split system for the computer room and dont touch the rtu
    Last edited by y7turbo; 03-27-2008 at 01:51 PM.

  3. #3
    Join Date
    Mar 2003
    Posts
    7,326
    if thats an old friend, what kind of jobs do old enemies give you?

  4. #4
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,310
    By the time ya get the money into zoning, dampers, panel, stats, labor, you aren't far from a low ambient mini.

    Our office's zoning works fine but we do sometimes have a problem in weather when part needs cooling and my area of the warehouse needs heating. When my heat call satisfies and the dampers open to the rest of the building, some residual heat ends up there making their cooling needs greater so the A/C turns on. Then if I call again for heat I don't get it.

  5. #5
    Join Date
    Nov 2007
    Location
    Texas
    Posts
    223
    Go with a dedicated unit for the server room. There are so many options, I have used mini-mates, small package units, split systems, etc...

  6. #6
    Join Date
    Mar 2007
    Posts
    3,108
    Not even an option. Tell them to get a dedicated system for the server room, or tell them to find a new contractor.

    You've got too much on the line if this thing doesn't work the way it should (and it won't), and this guy ends up with a couple of fried computers. I guarantee he'll be looking for someone to hang out to dry, and won't remember that it was his idea in the first place.

  7. #7
    Join Date
    Jun 2004
    Location
    EXIT 16W www.wmtandson.com
    Posts
    3,714
    Quote Originally Posted by BaldLoonie View Post
    By the time ya get the money into zoning, dampers, panel, stats, labor, you aren't far from a low ambient mini.

    Our office's zoning works fine but we do sometimes have a problem in weather when part needs cooling and my area of the warehouse needs heating. When my heat call satisfies and the dampers open to the rest of the building, some residual heat ends up there making their cooling needs greater so the A/C turns on. Then if I call again for heat I don't get it.
    I hear what your sayin.
    I,ll explain all that to my customer and get his input
    DON"T mess with the US
    I thought I had been there and done That.
    ITS ALL ABOUT LEARNIN!
    I thought it would be better by now
    "He who works with his hands is a laborer.
    He who works with his hands & his head is a craftsman.
    He who works with his hands, his head & his heart is an artist."
    ~St. Francis of Assisi

  8. #8
    Join Date
    Jun 2004
    Location
    EXIT 16W www.wmtandson.com
    Posts
    3,714
    Quote Originally Posted by BergerMech Rob View Post
    Not even an option. Tell them to get a dedicated system for the server room, or tell them to find a new contractor.

    You've got too much on the line if this thing doesn't work the way it should (and it won't), and this guy ends up with a couple of fried computers. I guarantee he'll be looking for someone to hang out to dry, and won't remember that it was his idea in the first place.
    Amen To That!
    DON"T mess with the US
    I thought I had been there and done That.
    ITS ALL ABOUT LEARNIN!
    I thought it would be better by now
    "He who works with his hands is a laborer.
    He who works with his hands & his head is a craftsman.
    He who works with his hands, his head & his heart is an artist."
    ~St. Francis of Assisi

  9. #9
    Join Date
    Jun 2004
    Location
    EXIT 16W www.wmtandson.com
    Posts
    3,714

    Stand alone unit?

    Not having alot of Commercial time under my belt I,m wondering if a Stand alone unit like a Liebert would make sense?
    Since he,s renting space its somnething he can take with him if he moves.
    I have no Idea of cost
    DON"T mess with the US
    I thought I had been there and done That.
    ITS ALL ABOUT LEARNIN!
    I thought it would be better by now
    "He who works with his hands is a laborer.
    He who works with his hands & his head is a craftsman.
    He who works with his hands, his head & his heart is an artist."
    ~St. Francis of Assisi

  10. #10
    Join Date
    Nov 2004
    Posts
    210
    we do fair amount server rooms,definitely find out the heat load of the gear in the room and a dedicated unit. depending on the load we use exhuast fans,mini splits,WSHP,and liebert which is the cadilac.good luck

  11. #11
    Join Date
    Dec 2005
    Location
    Spokane Wa
    Posts
    169
    Sounds like an ideal setup for a ductless split for the server room. Then when he leaves down the road he could take it with him.

  12. #12
    Join Date
    Nov 2004
    Location
    SW FL
    Posts
    6,323

    Thumbs up

    Quote Originally Posted by epacertified View Post
    Not having alot of Commercial time under my belt I,m wondering if a Stand alone unit like a Liebert would make sense?
    Since he,s renting space its somnething he can take with him if he moves.
    I have no Idea of cost
    Call Liebert repr and he'll tell you
    How proud he i$ of the Liebert $y$tem !

    Then you can call Sanyo, Mr Slim or other representatives.
    Also, sometimes know as or misnomered as V alue E ngineering
    Designer Dan
    It's Not Rocket Science, But It is SCIENCE with "Some Art". ___ ___ K EEP I T S IMPLE & S INCERE

    Define the Building Envelope and Perform a Detailed Load Calc: It's ALL About Windows and Make-up Air Requirements. Know Your Equipment Capabilities

  13. #13
    Join Date
    Feb 2007
    Location
    Dallas, Tx.
    Posts
    572
    stand alone split- locate the AHU outside of the server room and duct supply in. Don't let a condensate leak into the servers. Any brand can be easily modified for low ambient with a condenser fan cycle switch and a low pressure bypass timer.
    Trying to serve this room by zoning the house air will not work. The load in the server room will be constant, and with a zoned system, you will constantly have unsatisfied zones.IMO
    mike

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