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Vtx hydrolevel

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Manofsteam
Manofsteam Member Posts: 11
in Thermostats and Controls

have a Burnham IN7 steam boiler with a 24-volt control system and the factory-installed McDonnell & Miller 801-120 low-water cutoff. I’m installing a Hydrolevel VXT automatic water feeder. The VXT has power, but I need to know exactly which terminal on the factory 801-120 should provide the signal to the VXT FEED terminal when the boiler is in a low-water condition.


My 801-120 has only one C terminal. Which terminal/wire should I use to trigger the VXT feeder? Could you please provide the correct wiring diagram for this setup?

Comments

  • Manofsteam
    Manofsteam Member Posts: 11

    I sent to Macdonald miller via the text help

  • Steamhead
    Steamhead Member Posts: 18,851

    Looks like terminal 4 calls the feeder. Here is the diagram from a M&M Uni-Match feeder that shows the PS-801-120:

    https://controlssupplychain.com/wp-content/uploads/manuals_pdf/mcdonnel-miller/CSC-mm-Uni-Match.pdf

    Co-Founder, All Steamed Up, Inc.

    Baltimore, MD, USA

  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 20,968

    Duplicate post.

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