Recent content by DJChad

  1. DJChad

    Wire Taco SR506-EXP-4 into existing system with 2 SR506-EXPs? HELP!?

    Hi guys, I have an existing 16-zone heating system using 3 Taco SR506-EXP switching relays wired in master/slave configuration. One of the relays failed out, so I went and got a new one, an SR506-EXP-4. Problem is, the old ones communicate with one another via 4 wires, labeled 1, 2, 3, and 4...
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