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Fast return/slow return

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  • delcrossv
    delcrossv Member Posts: 742
    edited November 2021
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    Thermostat moved to 2nd floor warm side. With it on HOLD at 70 all the apts are "comfortable". 2nd floor cool side is in the upper 60's, 1st floor above the boiler is mid 70's.
    Got some Maid-o- mist #4's that will go into the warmest apt.

    **Main issue is too long a time between firings so there's a big swing in temps in the apartments. I think it's a thermostat setting issue. Any recommendations for that? It's a WR 1F90- time to swap it for a FocusPro?

    When this boiler finally conks out I'm splitting the long main into two shorter loops. There's a flange that makes it doable. Each loop will then have 10 emitters with a similar mix of sizes. I'll have a series of questions for layout when that gets closer.
    Trying to squeeze the best out of a Weil-McLain JB-5 running a 1912 1 pipe system.

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