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

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I have baseboard heat the thermostat went bad i have 3 wire in the box and the new thermostat has 4 2 black and 2 red how do wire this

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: marley md26 line voltage thermostat

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

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SOURCE: Help with wiring. the thermostate

I think what you have is a 220 volt thermostat. That is why it isn`t making sense to you.

Posted on Feb 15, 2011

rockmeister
  • 2047 Answers

SOURCE: I want to install marley 240 volt hydronic

Regardless of the wire which you intend to use for safety reasons it is best for you to use two different circuits. These equipment are heavy duty and often they could encounter little malfunctions which the circuit might not be able to support. Also it is best to use 2 circuits so in case there is ever a problem with the circuit it wont affect both units at the same time. Although running both on the single circuit will work but it is just not a safe thing to do as they are best separated.
thanks for using Fixya.
Hope this solution has been helpful?

Posted on Apr 13, 2011

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1 Answer

Cadet baseboard heater


If I have your information right you have a black wire and a white wire marked red coming to the heater with 240 volts between them. You have a double pole unit mounted thermostat with a red and a black wire. Most double pole thermostats have two red and two black wires on them so I am not sure if you have a double or a single pole thermostat.There are also two wires going to the baseboard heater. One is connected to the element the other to a high limit switch which is then connected to the other end of the element. If the thermostat is a double pole the two red (or load) wires should connect one to each of the baseboard wires. The two black (line) wires should connect one each to the two incoming power leads. If it is a single pole thermostat the one red wire should connect to one of the baseboard wires the black should connect to one of the incoming power wires the remaining baseboard and power wires should then be connected together. Hope this helps

Dec 12, 2013 | Heating & Cooling

1 Answer

Im hooking up a base board heater for the first time with a non programmable thermostat that has 2 black wires on the thermostat. I'm hooking it up to a two pole breaker that means back wire to top screw...


Hello there
It sound alright but You should draw out a wiring diagram on paper first before you tackle the job that way you know you're doing it right.

Good luck Dickson

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baseboard heaters are usually line voltage thermostats. the wire in your box sounds like a 240 volt circuit. either the 2 blacks or the 2 reds and wire nut the others. I dont know if they need to be connected to each other, not sure where they go or what they are to

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I recently installed a new elec. baseboard heater with a wall thermostat in a new addition. i wired a 220 tstat. there were 2 red line wires on the tstat. there were 2 black load wires on the tstat. i put...


When you checked across the black and white at the heater did you get 220v? If you do, then the heater is bad or the high limit is kicked out, check it out to see if it is open (no current will flow through it).

Nov 13, 2009 | Heating & Cooling

1 Answer

I am replacing old 220 volt thermostat with a programable 220 volt thermostat. There are 6 wires in the box. (3 black & 3 red) There are only two black wires on the new thermostat. On the old...


Hi, this can be confusing. Be sure you have the power off before you wire it, but first you have to have an elect meter. The 6 wires in the box you will only use 2 of them. Cap the other 4 off. Use the 2 that have the correct voltage across them, 208, 220, 240 volts. The new stat is only set up for 2 hot wires 120 each. That will do it. Not to bad. be careful! Use care. Good Luck, Sincerely,
Shastalaker7

Nov 08, 2009 | Heating & Cooling

1 Answer

No i didn't. I need instructions for wiring a


you have baclk and red wire supply and a black and red wire to load (baseboard).
your switch will have 2 black and 2 red.
connect blk supply to 1 black on switch ( it doesn't matter which one)
connect red supply to 1 red on switch
then
connect black from baseboard to black switch
connect red from baseboard to red switch
if multiple baseboards that have several loads at thermostat then just connect baseboard blacks together and reds together before connecting at switch.

Oct 17, 2009 | Heating & Cooling

1 Answer

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From the two red and two black wires (and the specs in the pdf), your new thermostat sounds like it's designed to directly control the line voltage (120 or 240) to the heater. That's the usual way baseboard heaters are controlled.

Could your wires be red, black, and (old, yellowed) white, the standard colors in a 3-wire power cable? Just the red and black should be enough to control a 120-volt heater so I don't understand what the white would have been used for. If it were my heater I'd take off the cover(s) -- with the power off, of course -- and find out what those wires actually connect to.

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I just had the same problem last night. Wire the two red wires from the thermostat to the power source from the service panel. The remaining two black wires from the thermostat connect to the heater.

Oct 20, 2008 | Fahrenheat Electric Convector Baseboard...

1 Answer

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The red and black is power and neutral. Green is just for the ground and that should tie into the ground wire for breaker or power wire .
The 2 black wire from thermostat should tie into the two red and black wire from your heater.
Just imagine you are wiring 1 heater to thermostat and just add the the next heater the same way

May 15, 2017 | Honeywell Programmable Thermostat Heater

1 Answer

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what is the make of the thermostat? are the heaters 240 volts?

Jan 27, 2008 | Heating & Cooling

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