diesel hot water

Discussion in 'Water Fed Pole Cleaning' started by kevinc250, Nov 30, 2015.

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  1. kevinc250

    kevinc250 Well-Known Member
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    hi,anyone on here run a diesel hot water stystem?wanting to see some pictures of how its all set up (its for an idea i am tinkering with at the moment)
    thanks in advance
     
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  2. Poles Apart

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    I don't bother with hot water but apparently Diesel systems are expensive most use gas I believe?
     
  3. Green Pro Clean Ltd

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    I set up gas for under £100 - diesel I cant seem to find any for less than £2500 :(
     
  4. spruce

    spruce Grand Master
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    #4 spruce, Nov 30, 2015
    Last edited: Nov 30, 2015
    Diesel Hot water system .jpg

    Relatively simple really.

    Webasto Thermo Top 5kw or Webasto 90 9kw diesel boiler complete with all controls, fuel pump and water pump.

    Hot water out from boiler to water to water plate heat exchanger then out to header tank and from header tank back to boiler. This will be the internal hot water circuit.

    The water to water plate heat exchanger has 2 water circuits the are separated by plates and these transfer heat from the hot water generated from the boiler to the cold water being pumped through it to your wfp brush. To ensure the water to your wfp brush remains at a controller temperature set by the operator a thermostatic mixing valve is included in the wfp circuit.

    Here's the complete TMV package.
    Webasto Eberspacher TMV Thermostatically Controlled HOT Water Heat Exchanger | eBay

    Oh, by the way, the hot water needs to travel through the heat exchanger in the opposite direction to the water traveling through it on its way to the brush head.
     
  5. Green Pro Clean Ltd

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    Do you know how to plumb all that Spruce? I am assuming (perhaps wrongly) the diesel comes from the vehicle fuel tank?
     
  6. Trev81

    Trev81 Guru
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    Heres mine, 9kw webasto twin operative heater. Adjustable valves for both pumps so you can set the desired temp required. Diesel from van tank.

    IMG_1284.jpg
     
  7. Green Pro Clean Ltd

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    What is the cost on something like that Trev81 ? Is it a self install as I don't think I have the confidence to mess with my vans fuel tanks?
     
  8. Trev81

    Trev81 Guru
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    No wouldn't of fancied myself mate, Xline did it, although they had to use a authorised mechanic to break into the fuel tank and do that side of it and it then gets signed off to cover myself as van still under warranty. I think it was around the 3k mark all in, I will dig out the receipt and let you know exactly if you like.
     
  9. Green Pro Clean Ltd

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    Thanks but no, as I said earlier, cant seem to find diesel with change from £2.5K. I will stick to gas for now! :))
     
  10. spruce

    spruce Grand Master
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    #10 spruce, Nov 30, 2015
    Last edited: Nov 30, 2015
    Either using the van fuel tank or a dedicated separate fuel tank.

    Some vans would be easier to 'tap' into the vehicles tank than others. On my diesel air heater I found the easiest way was to tap into the vans diesel return pipe to the tank. The down side is that the return pipe doesn't reach down to the bottom of the tank. So when using it in winter I need to ensure the diesel tank in the van never drops below 1/4. If it does, then I can't use the heater.

    My van has access to the fuel tank via an inspection cover inside the van. This would allow me to remove and replace the fuel pump without dropping the tank. If I wanted to tap into the tank on my son's Peugeot Partner van then I would have to drop the fuel tank to fit a 'stand pipe' to supply the heater.

    The most popular fuel tank is an outboard motor fuel tank from the boating world. Most of them have fuel gauges built in and are portable. They can be removed from their secure fixture and filled up with diesel outside the van on the forecourt which will minimize any fuel spillage inside the back of the van. I've also seen those steel jerry cans used. You can buy them including a securing frame from MachineMart. The only problem with them is that they don't have a gauge or sight glass so you can see immediately how much fuel you have left in the tank.

    Tapping into the fuel tank is probably the best option as you don't want the diesel heater sucking air. Once they do then they need to be bled and hopefully they will restart. If not then removing the power fuse for 30 secs could successfully reset the electronics. If that doesn't work, then it will have to be reset by a repair agent/specialist who will use a computer program to clear the fault codes. That will cost similar to a dealership putting you car onto the computer to clear fault codes.

    My Citroen Relay is in fact a Fiat Ducato with a Citroen Hdi engine. The Ducato is the most popular chassis used as motor homes. Diesel heaters are popular with motor home owners. So there are technicians who remove the fuel pump and fuel gauge sender unit assembly from the tank and drill a hole in the top of it to fit a standpipe. But again this takes some 'balls' to do as a small mistake can damage the unit and cost a fortune to replace the complete assembly. Space is extremely tight and a Webasto standpipe has to be 'engineered' to fit.
     
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