DJChad
New Member
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. The new one communicates via 3 wires labeled A, B, and C. Can anybody tell me how I connect them?
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. The new one communicates via 3 wires labeled A, B, and C. Can anybody tell me how I connect them?
