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Aquastat Manual Reset?

Post in 'The Boiler Room - Wood Boilers and Furnaces' started by WoodNotOil, Sep 25, 2008.

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  1. WoodNotOil

    WoodNotOil Minister of Fire

    Joined:
    May 6, 2008
    Messages:
    909
    Loc:
    Northern, Vermont
    I have a Honeywell L4006H 1004 open on temp increase manual reset. Details can be viewed at http://www.pexsupply.com/product_dtl.asp?pID=1736&brand=Honeywell&cID=294. I don't know what the manual reset means. Can this simply be used as an open on temp increase aquastat or do you have to reset it every time it opens? I had it from my old steam system and would put it to use if it opens and closes without reset. Otherwise I see little use for it. Thanks.

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  2. BrownianHeatingTech

    BrownianHeatingTech Minister of Fire

    Joined:
    Oct 5, 2007
    Messages:
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    Loc:
    Northwood, NH
    You have to reset it every time it opens.

    Manual-reset aquastats are used for safety, not operation. That way, if the temp spikes above the normal operating range, the manual reset will trip, and you will have to go and reset it in order to re-start the system. Hopefully, you will then also make an attempt to determine why it tripped, since you've been alerted to a problem.

    Joe
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