Inline heater

Collecting, filtering and dewatering of WVO SVO vegetable oil. For Biodiesel producers too.

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Inline heater

Postby rufushusky » Mon Jan 19, 2009 10:09 pm

Hi all, supernewbie here. I am looking to add an inline heater to my pump and I picked up a 4500w 240V hot water heater element, the low density one that hooks around. I hear it is a good idea to use a thermostat, how would I wire a 240 volt heater with a thermostat with a 120 volt line feeding it? Thanks!
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Postby kirkharrod » Tue Jan 20, 2009 8:12 am

Put the heater element inside a 1" black steel pipe.
Mount thermostat on the pipe with a clamp or JBWeld.
Take an extension cord and cut off the receptacle end.
One of the two wires has an identifying line on it.
Cut this wire. Wire one end to one terminal of the thermostat.
Wire the other end of the wire to the other terminal on the thermostat.
(So now the thermostat "interupts" the wire).
Set temperature on thermostat. 140* is PLENTY hot enough.
Plug it in.

*** you don't need an element that big. 1500W will do fine.
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Postby rufushusky » Tue Jan 20, 2009 2:47 pm

kirkharrod wrote:Put the heater element inside a 1" black steel pipe.
Mount thermostat on the pipe with a clamp or JBWeld.
Take an extension cord and cut off the receptacle end.
One of the two wires has an identifying line on it.
Cut this wire. Wire one end to one terminal of the thermostat.
Wire the other end of the wire to the other terminal on the thermostat.
(So now the thermostat "interupts" the wire).
Set temperature on thermostat. 140* is PLENTY hot enough.
Plug it in.

*** you don't need an element that big. 1500W will do fine.



Ok, How do you set the themperature?

We are talking about something like this:

Image

right?
2004.5 Dodge Ram 2500 CTD, Smarty, mp8, WVO in the future sometime...
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Postby WD8CDH » Wed Jan 21, 2009 12:37 pm

If it is a low density element, you will probably have to use 1 1/4" pipe.

You probably would use a lower element thermostat only for simplicity.

On 120V, your 4500W element will be a 1125W element.
Ron Schroeder
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Postby rufushusky » Wed Jan 21, 2009 12:57 pm

ok so something like these instead:
Image

Image

?

Those do seem easier. Thanks!
2004.5 Dodge Ram 2500 CTD, Smarty, mp8, WVO in the future sometime...
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Postby rufushusky » Wed Jan 21, 2009 1:08 pm

So would I interurpt the black wire but connect the red wire right from the element to feeding wiring?

Like the boot half of this:

Image

sorry about the pics but I am a visual guy... 8)
2004.5 Dodge Ram 2500 CTD, Smarty, mp8, WVO in the future sometime...
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Postby WD8CDH » Wed Jan 21, 2009 4:52 pm

Yes, use the simpler (and cheaper) lower thermostat.

Use the lower element and thermostat from the diagram.

Connect other end of the black wire that is attached to terminal 1 of the lower thermostat to 120V instead of top terminal 4.

Change the blue wire that is connected to the lower element to white and connect the other end to neutral instead of the bottom terminal 4.

The yellow wire can stay yellow or be any color other than white or green.
Ron Schroeder
WD8CDH
'85 MB 300DT 2 Tank
Since '81 former WVO conversions:
'83 240D
'80 Audi 4000D
'83 Isuzu Pup
'86 Golf
'76 Honda Civic with Kubota engine
Prior to the cars, several generators
Kubota Tractor
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Posts: 103
Joined: Tue May 27, 2008 11:44 am
Location: NY

could someone clarify this thermostat stuff

Postby carybrief » Wed Aug 19, 2009 9:29 pm

I am setting up a fuge and am rading about the thermostat stuff however the explanation for wiring the stat doesnt mention wiring to the heater so how would it control anything? I read it five times and unless I am very tired I am confused. can someone explain how to hook up a thermostat to a heater for a centrifuge system? thanks all
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