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Best Thermostat for Steam System?

Shuttle
Shuttle Member Posts: 24
Hello guys/gals



I read in another Thread that one should use a thermostat specifically for Steam systems. (as opposed to a cheapy heating and cooling thermostat)



I a single family 2 floor+ finished basement

1 pipe steam system w/ Burnham natural gas



What is best out there in ur guys expirience???

Comments

  • Jamie Hall
    Jamie Hall Member Posts: 22,917
    There are several

    models of Honeywell VisionPro thermostats -- various programming options etc. -- which seem to be popular.  Just make sure that it can be set for 1 cycle per hour (steam/gravity hot water).  Most of them can...
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • brian_44
    brian_44 Member Posts: 59
    FocusPro TH6110D1005

    I installed one of these before this year. Works great and not as pricey as some of the VisionPro units...
  • Shuttle
    Shuttle Member Posts: 24
    edited January 2011
    Cannot connect new thermostat

    High Guys



    I just got my visionPRO from pex.....



    But I cant seem to be able to wire it correctly...



    My old thermostat has three wires coming into it (W, G and Power)



    When I TRY using this same configuration on VisionPRO it does not fire the boiler



    The instructions only demonstrates heating with a two wire heating system?



    I do not know why my system has three wires? could it be a fan control?



    I got a burnham gas-fired steam boiler



    plzhelp
  • jpf321
    jpf321 Member Posts: 1,568
    do you have a link to the installer manual?

    posting it may help.



    did you trace the wires back to the boiler end? gas or oil? where do the t-stat wires connect boiler end? if you short the two wires (t-stat end) connected to TT terminals (assuming there are any) .. does the system fire?
    1-pipe Homeowner - Queens, NYC

    NEW: SlantFin Intrepid TR-30 + Tankless + Riello 40-F5 @ 0.85gph | OLD: Fitzgibbons 402 boiler + Beckett "SR" Oil Gun @ 1.75gph

    installed: 0-20oz/si gauge | vaporstat | hour-meter | gortons on all rads | 1pc G#2 + 1pc G#1 on each of 2 mains

    Connected EDR load: 371 sf venting load: 2.95cfm vent capacity: 4.62cfm
    my NEW system pics | my OLD system pics
  • jpf321
    jpf321 Member Posts: 1,568
    how did you arrive at the ....

    labelling for the wires? Power W and G?i assume you took the values from the old t-stat .. what was the old t-stat Brand/Model .. maybe we can find the manual for that and see what's what ..



    here's the visionPro 8000 installer manual .. http://www.ssihvac.com/PDFdocs/Visionpro%208000%20Tstat.pdf
    1-pipe Homeowner - Queens, NYC

    NEW: SlantFin Intrepid TR-30 + Tankless + Riello 40-F5 @ 0.85gph | OLD: Fitzgibbons 402 boiler + Beckett "SR" Oil Gun @ 1.75gph

    installed: 0-20oz/si gauge | vaporstat | hour-meter | gortons on all rads | 1pc G#2 + 1pc G#1 on each of 2 mains

    Connected EDR load: 371 sf venting load: 2.95cfm vent capacity: 4.62cfm
    my NEW system pics | my OLD system pics
  • Shuttle
    Shuttle Member Posts: 24
    OLD thermostat = honeywell rth110B

    Thanks for the quickreplies JPR!!



    In your first reply ....I could not answer your questions (to technical!!!)



    i got the old values from my original thermostat (ugly dial type) i then purchased a NON programable typ (honeywell RTH110B) I kept the same wiring arrangements



    Now, I wanted to upgrade to Honeywell VisionPro 8000

    model# TH8110U1003



    If I use the same values...Y, W and R the system does not start



    And I cannot seem to follow the instructionmanual because it does not list a heating system with 3 wires!!!!



    PS I called Honeywell (they said model TH8110u1003 isfor professional/Contractors only....They cannot help me "the homeowner"



    And pexsupply!!!!! a female tried to help but could not even begin to understand me....



    Should I eliminate the 3rd wire?? (according to installer manual)



    PS, thanx forfinding the manual online



    appreciatte help
This discussion has been closed.