Results 1 to 6 of 6
  1. 01-16-2009, 07:46 PM #1
    sl004089
    sl004089 is offline New Guest
    Join Date
    Jul 2007
    Posts
    3

    Vision Pro with Indoor Sensors (Average Temperature)

    When using a Vision Pro with indoor sensors and the setup is set to average between the theromostat and remote indoor sensors is the thermostat given the same weight as multiple sensor's.
    For example one tstat with three indoor sensors. Is the average:
    1) T.stat-50%
    Remote sensor one and two and three 50% (Ratio of one to one) or
    2) T.stat-25%
    Remote sensor one 25%
    Remote sensor two 25%
    Remote sensor three 25% (Ratio of three to one)

    Cheking the wiring diagram at Honeywell I can only see how #1 is possible. Tks.
    Reply With Quote Reply With Quote
  2. 01-18-2009, 09:51 AM #2
    sumrdaz
    sumrdaz is offline Regular Guest
    Join Date
    May 2008
    Posts
    7
    from what ive always understood was when using remote sensors by themselves or using multiple for an average the thermostat it self does not use its internal sensor at all anymore.
    Reply With Quote Reply With Quote
  3. 01-18-2009, 04:04 PM #3
    wre2000mw
    wre2000mw is offline Professional Member
    Join Date
    May 2005
    Posts
    20
    sumrdaz is correct. When the sensors are used the sensor in the stat is not. The sensors must also be used in square numbers. Meaning 1 sensor for a remote situation or for averaging with 4, 9, 16, 25 and so on.
    Reply With Quote Reply With Quote
  4. 01-18-2009, 05:38 PM #4
    lbf's Avatar
    lbf
    lbf is offline Professional Member
    Join Date
    Nov 2000
    Posts
    1,251
    Quote Originally Posted by wre2000mw View Post
    sumrdaz is correct. When the sensors are used the sensor in the stat is not. The sensors must also be used in square numbers. Meaning 1 sensor for a remote situation or for averaging with 4, 9, 16, 25 and so on.
    Honeywell's installer's guide is vary lacking on this subject but we have found out that their commercial version of this stat will let you use nearly any number of sensors.
    "You do not merely want to be considered just the best of the best. You want to be considered the only ones who do what you do.".... Jerry Garcia
    "You just have to decide if you're a Tigger or an Eeyore,..I think you know where I stand on the great Tigger/Eeyore debate." Prof. Randy Pausch
    Reply With Quote Reply With Quote
  5. 01-19-2009, 10:46 AM #5
    wre2000mw
    wre2000mw is offline Professional Member
    Join Date
    May 2005
    Posts
    20
    lbf, thanks for that info. We have used these on several jobs and I wished on some of them we could have only used the exact number of sensors needed.

    Matt
    Reply With Quote Reply With Quote
  6. 01-19-2009, 06:34 PM #6
    wraujr
    wraujr is offline Regular Guest
    Join Date
    Aug 2008
    Posts
    416

    Commercial offers 10K and 20K Sensors

    It looks like Residential has just a 10K ohm sensor and t-stat wants a 10K network.

    Commercial offers both a 10K and 20K sensor that can be combined to form different networks with the t-stat wanting to see 20K ohm.

    For one sensor, place 1 20K sensor
    For two sensors, place 2 10K in series and you get 20K
    For three sensors, first place 2 20K in parallel (results in 10K) followed by 10K in series to get a total network value of 20K
    For four sensors, create 2x2 network.

    Bottom line, is you create a network that has an equivalent resistance of 20K.

    Not all combinations are possible.
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules