Jotul 300 DV IPI / Nest Thermostat question

Rht Posted By Rht, Feb 12, 2018 at 11:05 AM

  1. Rht

    Rht
    New Member 2.
    NULL
    

    Feb 11, 2018
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    Loc:
    Denver
    Folks,

    I have a new Jotul 300 Allagash with the Proflame 2/SIT valve and remote system. We use this as a primary heat source for a small cabin in the mountains. My goal is to control the stove with a Nest learning thermostat and I have mostly achieved that goal. Ideally, when I head the mountains, I'd like to pre-heat the cabin. We also use the Nest to remote monitor temperature.

    The setup works like this. The Jotul/SIT system nominally has provision for manual mode and offer the ability to tie in a millivolt thermostat. The Jotul manual illustrates this option. I have employed the UK version of the Nest Learning Thermostat, which, unlike the US version, offers relay device that can handle the millivolt switching when there's a call for heat. If you are curious, the links below illustrate what I'm doing.



    http://www.scottshapiro.com/hacking-nest-uk-san-francisco-heater/

    Here is the issue: When I put the stove into what I call manual mode using the proflame remote and switch the stove into T-STAT mode (I leave the stove in CPI), the Nest works like a champ. Until it doesn't.

    When there's a call for heat, it fires. When target temp is reached, the burner shuts down. However, after about 24 hours or so, something happens that the main burner refuses to light on a call for heat. Pilot stays on. If I press the rocker button on the Proflame remote, the stove immediately fires and then we're back in the game.

    I've run continuity checks on the Nest relay -- everything seems to check out. My wire connections seem tight and complete. When the stove is running using the Proflame remote, it's rock solid.

    Obviously, this is not great when I'm 100 miles away.

    My questions are these:

    Does the Proflame system have a "rules" in its programming that would lead it to "time-out" if the remote is not used in a certain period of time? If so, is there a way to over rule such programming?

    What else am I missing?

    The retailer and other pros I've spoken with are flummoxed at the initial concept I'm attempting to achieve, that troubleshooting my specific issue has been difficult.

    Thank you so much in advance.

    Bob
     

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