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Reducing wattage output on electric fan heater


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I know it's not boat related, but I bought a redwing sunfan of eBay for £6

its like brand new, considering their over £100 new I thought it be a bargain

https://uk.rs-online.com/mobile/p/products/0273078/

but it has no settings, it's just 3 kw, which is too much for my electrics

is there something I can do to reduce the out to 2 kw?

as in inside wire or something?

i would appreciate any advice as it was a bargain lol, but being on a wall stand makes it ideal

Many thanks in advance

 

i know there be folks that will say just go out and buy a 2 kw one!

but if it's just disconnecting a wire

 

Col

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Okay I've just undone the top

and I've tried disconnecting 1 of the main white connectors, I've tried each one alternately but fan works blowing out cold

no heat at all.

it seems as tho there is two elements, and there are two starts to the element.

im thinking just snip on of those little wires? As in photo 3 and 4

thankyou for your advice

so what do you think?

IMG_4746.JPG

IMG_4743.JPG

IMG_4744.JPG

IMG_4745.JPG

Greenies been given lol. Thankyou

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It appears to me to be one, long spiral.  If you cut the coil it will go 'piyong!'

You could try connecting one of the white wires to the middle of the spring, if you can solder. oh bollocks!

Edited by mross
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41 minutes ago, mross said:

It appears to me to be one, long spiral.  If you cut the coil it will go 'piyong!'

You could try connecting one of the white wires to the middle of the spring, if you can solder.

 

Half the resistance, twice the current...

 

A trick I have used in the past is put put a big diode (suitably rated and heatsinked) in series with the mains feed. That might not work if the MCB on the shore supply is tripping.

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How many spiral ends are there?  If 4 then disconnect any one, voila!  If only 2 then a large diode will do it as previously mentioned but it'll have to be 10A and capable of coping with the heat. 

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Hi Tony

theres 2 separate fillements, so if I cut the the joining wire to both elements, will the one element still work instead of the two.

 

col

2 minutes ago, OldGoat said:

May be a dumb suggestion - but what about a cheap auto transformer and run it at 110v?

Half the voltage - around half the power...

Thankyou old goat, This sounds good, I can buy this as a plug connector I think?

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5 minutes ago, bigcol said:

theres 2 separate fillements, so if I cut the the joining wire to both elements, will the one element still work instead of the two.

Yup, if the filaments are wired in parallel. 

Do you have the ends of both filaments connected together, connected to the switch and then the other ends of both filaments connected together to Neutral?

Edited by WotEver
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If you only have one filament end to Neutral and one filament end to the switch and two other filament ends going nowhere, just connected together, then they're wired in series. 

Edited by WotEver
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3 minutes ago, bigcol said:

Hi Tony

theres 2 separate fillements, so if I cut the the joining wire to both elements, will the one element still work instead of the two.

 

col

Thankyou old goat, This sounds good, I can buy this as a plug connector I think?

?que? an auto transformer is quite a big box - but they do have plugs and sockets. They are also expensive hence mu diffidence -

http://www.screwfix.com/p/portable-transformer-with-2-output-sockets-3kva/84144

 

A simple plug connector won't do!

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2 hours ago, WotEver said:

Yup, if the filaments are wired in parallel. 

Do you have the ends of both filaments connected together, connected to the switch and then the other ends of both filaments connected together to Neutral?

Okay I've undone the bracket showing me the wires,I imagine the 2 black wires go to the 2 elements, shall I just disconnect one black wire.

the only thing 1 bulk wires goes to neutral, and 1 goes to live

IMG_4747.JPG

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38 minutes ago, mross said:

16 x 230 = 3680 or 3.6kW.  Remember, you can get 3kW from a 13A socket.

^^^^ This. 

3000W/230V = 13.04A

3500/230 = 15.22A

3700/230 = 16.08A

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5 hours ago, OldGoat said:

May be a dumb suggestion - but what about a cheap auto transformer and run it at 110v?

Half the voltage - around half the power...

 

Or buy another, and connect the two of them in series!

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