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    PROBLEMS INSTALLING HORSTMANN C17 CH CONTROLLER

    I bought a C17 to replace my aged brown/cream digital Drayton Tempus Seven. The Drayton backplate has 7 teminals: E, N, L, 1, 2, 3, 4; and there are 3 wires connected to N, L, and 4. The C17 has an industry-standard backplate of 6 terminals: N, L, !, 2, 3, 4 and a separate earth terminal. The...
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