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Thread: Atlas Copco Wiring

  1. #1
    Join Date
    Mar 2008
    Barrington, NH

    Default Atlas Copco Wiring

    I bought an Atlas Copco vac pump, and it has a disconnect plug on the back that I'm not sure how to wire. It's a 3 phase motor with a Lenze VFD. I'm running 12/2 wire to the VFD and 12/2 from the VFD to the pump. Both 2 hots and a ground.

    I've wired the VFD with L1 and L2 as being the hot lines coming in and the ground.

    I've wired the VFD T1 and T2 (or U and V) to be the hots and the ground leaving the VFD going to the pump.

    The vac. pump has a fancy disconnect plug (female side) that came mounted to the pump and wired on the inside. The wire coming out of the VFD to the pump needs to be wired to the male side of the plug. The male side has terminals number 1-3 with a ground designated. I believe that T1 and T2 should be connected to terminals #1 and #2, respectively. Am I correct? It made sense, but I wanted to double check before I did it, and I was trying to avoid taking the cover off to check it out.

    I hope this made sense, and let me know if you need more info.

    VFD Wiring

    Plug to be wired

    Vac. Pump plug

    2009 - 370 on vac. & 16 buckets
    2010 - 377 on vac.
    2011 - 590 on vac.
    2012 - 620 on high vac., 170 buckets, 110 on gravity tubing
    2013 - 830 mine + 800-1000 others
    2014 - 870 mine + 800-1000 others
    2017 - 920 mine + 500-700 others
    2018 - 902 mine + 500-700 others
    2019 - 902 mine + 700 others
    2020 - 902 mine + ???? others
    Atlas Copco Pump
    2.5'x8' 802maple Special with Dallaire pans
    H2O Innovation 600gph RO
    Spring Harvest Website

  2. #2
    Join Date
    Mar 2010


    Where did you buy the unit? Maybe they can provide wiring. Vfd would have to be one capable of converting single phase to three phase. Unless you already have three phase power. Either way a three phase motor needs three hot or power wires plus a ground.
    H20 econox 3 membrane
    4500 taps
    30"x12' evaporator
    10x31 shack

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