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Help programming thermostat

Frankfog2
Frankfog2 Member Posts: 25
in THE MAIN WALL
Hey,
I need help properly programming the indept part of the thermostat. I have a Steam Boiler, they are balanced and function overall well. I had to replace the thermostat because it wasn’t turning the boiler on when it was supposed to. How do i set it up for steam heat? according to the manual default is set for forced heat. 

https://www.honeywellstore.com/store/images/pdf/rth6360d-5-2-programmable-thermostat-manual.pdf

Comments

  • Fmassarotto_9
    Fmassarotto_9 Member Posts: 111
    I have the same thermostat, mine is set up as follows
    120- 0 (programmable thermostats are apparently not recommended in steam systems, that’s what my service guy told me)
    125-0
    200-3
    205-12
    Everything else i believe doesn’t apply, unless you’re using the thermostat for cooling  as well in which case idk how to program that side 
  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 8,326
    edited November 2023
    Go into SET UP mode

    once in setup mode scroll to number 200 and select 3 for boiler
    then to item 205 and select item 12 for steam


    If you want to use the setback feature, I would not set the night or away temperatures more than 5° lower than the at home temperature. But it would be better if you just left item 120 set at 0. Most steam systems are oversized and will recover quickly. But I seldom see any great savings on fuel usage. I would only use it for comfort reasons. Like if you want the room colder when you sleep.

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

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