Question about Marley Electric Hydronic Baseboard Heater, 58" 240V/1250 Watts

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Marley md26 line voltage thermostat

Help with wiring. the thermostate has 2 red and 2 black. line from heater has 1-black 1-white + bare coper ground and supply has same. thermostate is a Marley md26 and base board is a farenheat electric/hydronic baseboard heater. all work at panel has been inspected and is good. i need to do this myself. have some experience with electrical. can some explain the wiring of both thermostat and and baseboard.

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The Black Wires from the md26 are your load(the heater) and the red lines are your line(power). The lines are also paired up on the thermostat with a red and black on the left and are red and black on the right. In the actual heater connect the black to the black wire and the white to the white and connect the grounds. In the thermostat connect the black from the heater to left side black( remember there are pairs left(black, red) right (black, red) and the white to the right side black connect the black from your power to the left side red and the white from your power to the right side red. Should be ready to go.

Posted on Nov 19, 2008

  • fzrwill Jul 14, 2011

    Thanks this was helpful as my instructions on the thermostat didn't show a diagram for 120 volt. The only thing that might confuse people is you don't specify if your looking at the thermostat from the front or the back when you say left side, or right side.

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