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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I have a base board heater in the basement. It's never been connect up the wiring is all there from the breaker box to the heater,it has 1blk.1white and the ground. heater has 1blk. 1 red & therostat


You need to take a meter and see if you have 220 volts between the black and white. if you do have 220 then hook white wire to the red on the on the thermostat and the black to the black wire on the thermostat. on the other side of the thermostat hook the red and black to the red and black to the heater
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Jan 01, 2012 | Marley Electric Hydronic Baseboard Heater,...

1 Answer

Hello Fixya Guru ! I am in the process of installing several Marley PLF series 2000 watt/ 240 volt electric "Hydronic" baseboard heaters. I am using 10/3 bx with a 30amp breaker. To my...


You are correct that these heaters use a two-wire 240 volt supply, and the neutral is not needed.

2000 watts = 240 volt x Amps ==> Amps = 8.3 amps

30 amps x .8 safety factor = 24 amps

24 amps / 8.3 amps = 2.9 heaters per 30 amp breaker (3 heaters should be okay)

More info, pls let me know.

Charlie

P.S. Where does the 2880-watt number come from ?

P.P.S. There has to be a ground bus-bar in the panel -- if it's a main panel (not a sub-panel) the ground buss and the neutral buss are connected in the panel. Could you clarify what you have in the panel.

Jan 11, 2011 | Fahrenheat Electric Convector Baseboard...

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I need a wiring diagram for hayward pool filter model K48m2n11b3


Are you trying to wire a pool pump?
I found manuals at the Haywood site > I saw nothing for K48m2n11b or anything close to that number
http://www.haywardnet.com/inground/products/manuals.cfm

But lets work on the problem and see if I can give you some help:

After opening a few manual and searching for the word 'volt' and 'pump' ... each manual talks about 'pumps' generically, as if the pump is a separate purchase item.

Lower down on the manual page they have a list of pool pumps. A search for the word 'volt' inside the pump manuals says 'match supply voltage to motor nameplate voltage.'

As you know, each electric device has a label showing voltage, wattage, etc. Your pump should show 120Volts or 240V. I didn't see any mention of 3 phase wiring, so I assume your Haywood pump runs on typical residential wiring? And that you are not using 440Volt or 3 phase.

The 120Volt pump will have a black, white and bare ground.
The 240Volt pump will probably have a black, white, red and bare ground
The 240Volt pump could have a black white and bare ground

First the 120V pump:
The 120Volt line from your breaker box will have a black Hot wire, white Neutral wire and bare ground >>> this wire connects color-to-color with pool pump

Next the 240V pump with black, white, red and bare ground
a) The 240Volt line from your breaker box can have the same 4 wires, in which case they connect color-to-color
b) The 240Volt line from your breaker box could have a black white and bare ground, in which case the black goes to black, the white goes to red, the bare coppers are connected, the white pump wire is capped off and not used. If pump does not operate with this wiring, another line from the breaker with wires that match pump might be necessary.

The 240V pump with black white and bare ground
a) The 240Volt line from breaker can have black, white, red and bare ground, in which case the black goes to black, the red goes to white, bare grounds are connected, the white wire is capped off
b) The 240Volt line from from breaker can have black white and bare ground, and this connects color-to-color to the pump

HOW do you know if line from breaker is 120V or 240V?
If you know which breaker wire is connected to, then it's easy
If you do not know which breaker
-turn off power
-separate wires so they can be tested
-use ordinary tester
-stand on dry boards
-tape tester leads to sticks so hands are away from power

-turn on power
-test each wire to bare copper
-tester lights up on Hot wire
-120V line will have 1 Hot wire
-240V line will have 2 Hot wires

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I am trying to install a fahrenheat f2543 heater with a fta2a double pole thermostat. there is a 12/2 wire coming into where the heater is being installed. how do i connect the red and black to the white...


Hi, this is very easy for you to do.The 12/2 Romex wire coming in is the power which you know. What you do need to know, is the voltage coming in? Sometimes they will use 12/2 Romex with ground for 220, 240, operation. You need to know if the T-stat is Line voltage 220, or 240 volt. You have to have the same voltage for both for it to control. Reguardless of the voltage, lets say it is in the 220 and up range. You take one of the 12/2 wires, white or black and hook it to the black or red on the T-stat and the white to the other one, red or black. Thats it, you are done! If the T-stat is 2-pole I am sure it is a high, Line votage T-stat. Best of Luck,
Shastalaker7

Nov 09, 2009 | Fahrenheat Built-In Baseboard Thermostat...

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I am trying to replace a electric baseboard heater that is 220 volts and I am unsure about the wiring. the heater has a red and black wire and there is a white and black wire coming out of the wall.How do...


if ur are replacing the heater and it was originally 220/240 ur wiring should b ok but to b sure trace the line wire back to breaker panel and look at breaker the white and the black should b hooked up to separate breakers if the white is hooked up to a ground bar usually on the inside side of the panel and the black hooked up to breaker ur line is 110/120 and will cause problems when hooked up. if the lines r 220/240 than red can hook up to white and black to black

Sep 25, 2009 | QMark FBE15002 electric baseboard heater...

1 Answer

I need to know how to wire the thermostat to the 30" Fahrenheit baseboard heater


if its 240v your line in to the thermostat is two hots (black and white, white in 240 is no longer nuetral and must be marked as hot) and a green/bare ground from the panel, these usually connect to the reds on the double pole thermostat. the load out is usually two black wires which are then connected to the black and white wires of the baseboard unit.

Aug 21, 2009 | Marley Heating & Cooling

1 Answer

How do I hook the wires up for a electric baseboard heater


this heater can usually be wired from either side. meaning your wiring can be brought through the wall inside of one side or the other.

the wiring you bring in to this unit needs to be 12g or larger.

it needs to be on a dedicated circuit. that means you cant splice into any other line. it needs to be for your baseboard heaters alone. that is code and wouldnt want to sleep in a house with baseboard heat that didnt have a dedicated circuit.

baseboard heat is most economical to run with 240v units. 120 is going to cost more to run.

you will need a thermostat either built into the unit or a thermostat unit mounted in the wall to run it.

dont mount the thermastat over the heater. I shouldnt have to explain why.

a 240 volt circuit run from your panel on a 20 amp breaker consists of 3 wires, a ground and a black and white.

in a 240v configuration both the black and white are hot and you must wrap some black tape around the white wire where it shows in your breaker panel and at the handy box in which you have installed the thermostat and then where it enters the heater. this re-designates the wire as a hot instaed of nuetral this gives you to black hots.

you hook the white and black wire to the line in side of the thermostat which should be the two red wires.then the two black load out wires of the thermastat run to your heater. hook your ground (green or bare) to the box if its metal and pig tail it to the ground screw on the thermastat, then out of that pigtail to the heater along with the two hot wires.

you will find a bare ground solid copper wire fixed to the inside connect your ground.

you will find two other wires they are both hots you will connect one of your hots to one of them and the other to the remaining.

what it looks like is an element sitting in the housing the housing is the baseboard and you have a hot wire running through a wire way to the other side and connecting to it and one hot stays on the side you brought the wires to.

in other words since you can wire it from either side you have to have a way to get the energy to one side or the other and they supply a way.

as long as this is labled as a 240 unit both wires are hot. take the covers off both ends you will notice the wire traveling from one side to the other. your goal is to have one hot connected at one end of the fillament and the other hot you brought in to the other end. the best way to hook up multiple heatrs is to have branch lines from the thermastat toeach heater, not to daisychain them one to the other becuase you will have voltage drop as a heater is using it before passing the voltage down the line leading to poorly functioning heaters








Mar 29, 2009 | Marley Electric Hydronic Baseboard Heater,...

1 Answer

Wiring for baseboard heater


I hope you are using a Line Voltage Thermostat!! First, make sure that the power feeding the thermostat is coming from a two pole breaker of the correct amperage (20 amp). If you are using 12-2 wire with ground then please mark the white wire with black tape at each end to identify it as a HOT power source and not a Neutral wire (which is a grounded lead). Do the same for the 12-2 wires feeding the baseboard heater from the Line Voltage Thermostat. The wires from the thermostat (One Black & one White w/black tape) will be wired to each one of the two wires (one Black & one Red or two Black wires) at the baseboard heater. It doesn't matter which wire from the thermostat is wired to which wire at the heater, just as long as there is one wire to one and one wire to the other.(eg. Black from stat to Black at heater/White w/blk. tape from stat to Red at heater OR Black from stat to Black at heater/White w/blk. tape from stat to OTHER Black at heater). I have seen baseboard heaters with two black wires or one black and one red wire. Hope this helps, but if you are confused then please have an experienced tech. do it for you.

Dec 14, 2008 | Fahrenheat Electric Convector Baseboard...

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