Best Thermostat for Steam System?

Shuttle

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???

Jamie Hall

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...

brian_44

FocusPro TH6110D1005

I installed one of these before this year. Works great and not as pricey as some of the VisionPro units...

Shuttle

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

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?

jpf321

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

Shuttle

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