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Thread: Switching from buckets to Shurflo on solar vacuum help

  1. #11
    Join Date
    Aug 2013
    Location
    WNY
    Posts
    460

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    how do folks deal with freezing if the diaphragm pump is located below the tank and it has to pump upwards? doesn't the pump out line freeze solid?

  2. #12
    Join Date
    Nov 2013
    Location
    Princeton, MA
    Posts
    439

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    It will freeze up. You need to drain the line after the pump shuts off. One way to do this is place a tee in the pump outlet line, and add a ball valve to drain the line when pump shuts off. If you are using a controller for the pump, for the valve you can use a normally-open motorized ball valve wired in parallel with the pump. When the pump turns on, valve energizes and closes. When pump turns off, valve opens and drains line. I have set up systems like this with the S3 controllers as well.

    Dave
    Mountain Maple farm
    2021: 260 taps, 70% red maples. Mountain Maple S4 diaphragm pump controller with automated sap transfer and text messaging
    New website:
    https://www.mountainmaplefarm.com
    https://www.facebook.com/MountainMapleFarm/

  3. #13
    Join Date
    Mar 2020
    Location
    Central Pennsylvania
    Posts
    99

    Default

    Ok, I didn't think of the pump being lower than the collection tank with freezing. I assume if I put the pump higher than the tank and the outflow just drops into the tank, I shouldn't have problem, right?
    Do you have a diagram showing how to wire the motorized ball valve into the temp controller? In case I can't get my pump high enough to drop outflow into collection tank; remember, this is in perfectly flat woods. I assume its safer to have sap freezing in the in-flow/lateral line as opposed to the out-flow. Obviously, raising the pump too high is going to cause sap to collect in the lateral leading into the pump manifold.
    2020 - 1st year - 13 black walnut taps - 4 bottles syrup
    2021 - 50 taps, 22 black walnuts/28 red maples - 4 gallons syrup
    2022 - 53 taps, 11 black walnuts/42 reds, 20 on vacuum

  4. #14
    Join Date
    Mar 2020
    Location
    Central Pennsylvania
    Posts
    99

    Default

    I got everything I need for the solar vacuum set-up except the battery. I got a MPPT solar controller which says it can handle sealed/flooded/gel/AGM and lithium batteries. I know you said a good lead acid deep cycle marine battery can run the 4008 pump for 35 hrs without recharging, but would one of the other more-expensive type batteries work or give better performance/longevity during stretches of cloudy days?
    2020 - 1st year - 13 black walnut taps - 4 bottles syrup
    2021 - 50 taps, 22 black walnuts/28 red maples - 4 gallons syrup
    2022 - 53 taps, 11 black walnuts/42 reds, 20 on vacuum

  5. #15
    Join Date
    Nov 2013
    Location
    Princeton, MA
    Posts
    439

    Default

    The pump run time is based on battery amp-hours. A battery with higher amp-hour rating will run the pump longer than one with a lower amp-hour rating. I would be interested in how well a lithium battery performs compared to a lead acid. I bet for equivalent run time, the battery would cost 3-4 times (or more) what a marine battery costs. They are much lighter and should last longer.

    Dave
    Mountain Maple farm
    2021: 260 taps, 70% red maples. Mountain Maple S4 diaphragm pump controller with automated sap transfer and text messaging
    New website:
    https://www.mountainmaplefarm.com
    https://www.facebook.com/MountainMapleFarm/

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