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  1. #1
    Join Date
    Sep 2007
    Location
    Under the sea
    Posts
    235

    Confused Controling Mr Slims

    I have a problem job where the ME specified some ductless Mr Slim fan coil units to be used for backup cooling for some small archive rooms. The DDC system is to turn on these unit in case the main AHU fails or is otherwise shutdown.

    Problem is these unit have remote control thermostats with the on/off button on the remote. Turning them off is easy, just kill power. But, once power is restored, someone must press the on button on the remote control.

    Has anyone found a way to turn on these types of units on with a DDC system?

  2. #2
    Quote Originally Posted by AutoPilot View Post
    I have a problem job where the ME specified some ductless Mr Slim fan coil units to be used for backup cooling for some small archive rooms. The DDC system is to turn on these unit in case the main AHU fails or is otherwise shutdown.

    Problem is these unit have remote control thermostats with the on/off button on the remote. Turning them off is easy, just kill power. But, once power is restored, someone must press the on button on the remote control.

    Has anyone found a way to turn on these types of units on with a DDC system?
    Newer models have a Lon option.

  3. #3
    Join Date
    Apr 2007
    Location
    San Diego, CA
    Posts
    1,348
    Quote Originally Posted by AutoPilot View Post
    I have a problem job where the ME specified some ductless Mr Slim fan coil units to be used for backup cooling for some small archive rooms. The DDC system is to turn on these unit in case the main AHU fails or is otherwise shutdown.

    Problem is these unit have remote control thermostats with the on/off button on the remote. Turning them off is easy, just kill power. But, once power is restored, someone must press the on button on the remote control.

    Has anyone found a way to turn on these types of units on with a DDC system?
    We ran into the same issue not long ago.
    We were able to obtain an adapter through RSD. (after many many phone calls)
    The part # is PAC-SE55RA-E
    The only place I found online with a description is in New Zealand, but they won't let you download the documentation, unless you're a member
    http://www.bdt.co.nz/comfortmaster/p...sp?item=69213A
    it's a $25 part. We used a Honeywell CHC controller to take care of the enable/disable.

    Hope this helps,
    -Digo

  4. #4
    Join Date
    Sep 2007
    Location
    Under the sea
    Posts
    235
    Hey Thanks that helps alot.

    Would have any of install sheets left hangin' around you could post?

    Can this be ordered from Mitsubishi? ... The guy who supplied the MR s**t units is already cryin' about warranty problems


    Thanks
    Auto

  5. #5
    Join Date
    Apr 2007
    Location
    San Diego, CA
    Posts
    1,348
    Quote Originally Posted by AutoPilot View Post
    Hey Thanks that helps alot.

    Would have any of install sheets left hangin' around you could post?

    Can this be ordered from Mitsubishi? ... The guy who supplied the MR s**t units is already cryin' about warranty problems


    Thanks
    Auto
    RSD (Refrigeration Supplies Distributor)
    http://www.rsd.net/
    (800) RSD-5359
    Call this guy directly - Armano from RSD at 619-575-3301 and he should help you out. (Tell him Carl from R&R Controls got this part from him)

    Try giving them a call and have someone look up the part number.
    I'll see if I can find the cut sheet on that part and I'll post it here.

    Good luck,
    -Digo
    Last edited by digo; 06-12-2008 at 07:01 PM.

  6. #6
    Join Date
    Mar 2007
    Location
    Australia
    Posts
    24

    Mitsubishi Lon Interface

    Mitsubishi has a Lon to M-Net interface available which you can see upto 50 Mr Slim units. There is about 20 snvts available to fully control all functions including the display. We set it up using 5 Splits and it worked very well

    I tried to find the model number and add the manual but my Server is offline

  7. #7
    LM ADAPTER, part number: LMAP03U. This is a gateway.

  8. #8
    Join Date
    Apr 2006
    Location
    New England
    Posts
    189
    Mitsubishi also has a bacnet gateway, part number: "SW-BACNET". Using this interface you can read/write setpoints, establish occupancy, override on/off, etc. I believe that SW-BACNET is basically a PC that communicates to a Mitsubishi gateway module which in turn talks on the serial network to the evap PCB's.

  9. #9
    Join Date
    Apr 2007
    Location
    San Diego, CA
    Posts
    1,348
    Here's a scanned version of the install sheet I promised
    Attached Images Attached Images

  10. #10
    Join Date
    Mar 2008
    Location
    NW Ohio
    Posts
    949
    Quote Originally Posted by drafty888 View Post
    Mitsubishi also has a bacnet gateway, part number: "SW-BACNET". Using this interface you can read/write setpoints, establish occupancy, override on/off, etc. I believe that SW-BACNET is basically a PC that communicates to a Mitsubishi gateway module which in turn talks on the serial network to the evap PCB's.
    Just for clarity's sake, the LON gateway has the same capability.
    We would want to leave anyone with the impression that the BACcrap gateway is capable of features that the LON is not.

    I suppose it would be useful for the BACcrappers.

  11. #11
    Join Date
    Apr 2006
    Location
    New England
    Posts
    189
    Lordy will this crowd ever grow up.

  12. #12
    Join Date
    Mar 2007
    Location
    Australia
    Posts
    24
    The LON cost was $1200 Australian and the Bacnet was $3500 plus when we spoke with Mistubishi. So we chose Lon even thou the JACE could do both

  13. #13
    Join Date
    Mar 2008
    Location
    NW Ohio
    Posts
    949
    Goodness sake, when will this crowd stop worrying about costs.

    Geez, when will this crowd stop worrying about what's best for the owners.

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