On board "Genny`s"

Discussion in 'Motorhome Chat' started by old-mo, Oct 7, 2009.

  1. old-mo

    old-mo Funster Extra Special Life Member

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    Just out of curiosity,, does it do or could it do any harm if you run the on board Genny while connected to an EHU... ?

    I leave my RV hooked up to the mains mainly because when it is damp and chilly I leave a Delongi oil filled radiator on very low.

    And as with any motorised equipment have always run the motor`s for a few minute`s to keep the cylinders/bores moving parts lubricated. every now and then.

    Will it do any harm? or should I disconect the EHU ?
     
  2. scotjimland

    scotjimland Funster Life Member

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    Hi Mo

    Depends how the 230v conversion has been done, it should have an isolating contactor on the genny output that is energised when you connect the EHU ..you may be able to hear it clunk as you connect.. some systems have a manual change over switch.

    If at all unsure best to disconnect before running .. the genny is 110v 60hz .. EHU 230v 50hz .. they don't mix well :Eeek:

    jim
     
  3. old-mo

    old-mo Funster Extra Special Life Member

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    Afternoon Jim,, that clunk,, I get one if the mains is connected at the house end when I plug in to the RV and it sounds as if it is coming from a balck box with slots in inside the wardrobe,, and noticed occasionally I can hear a noise from that box like a fan starting and stopping,, not very often must admit.

    Oh what it is to be thick.. :Doh:

    Thanks.
     
  4. Geo

    Geo Trader - Funster

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    Running genny with hook up is not realy doing much for the gen side of things
    Good practice to run geny for an hr under load ie Air con running once a month
    to keep every thing inc air con Tickity Boo:thumb:
    Geo
     
  5. vindiboy

    vindiboy Funster

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    This seems to me a bit like starting your engine when on EHU, all is supposed to be protected,but why risk it? a friend of mine did just this and " blew " up his Blue Hymer Control box, not cheap to replace.I have a free standing Gennie but wonder sometimes why I lug it around as it very seldom is needed.:Blush::Blush::Blush:
     
  6. madbluemad

    madbluemad

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    Hi Mo

    I'm sitting here wondering why you would want to run the genny when your hooked up ?

    Jim
    :Smile:
     
  7. moandick

    moandick Read Only Funster

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    I tried it on a brand new Forest River Georgetown - and it cost the Warranty Company a new control board!

    Olley tells me that there should be some kind of detector thingummy in the electrics locker that will redirect the supply from hook-up to Genny or vice versa.

    It didn't work for me - so nowadays, I always dissconnect before I exercise the genny.
     
  8. moandick

    moandick Read Only Funster

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    At the time in question I was on a 4 amp supply hook-up - and wanted to use my domestic kettle for a quick cup-of-tea.

    Took me several days to get the genny repaired, added to my knowledge considerably, and I didn't get my cup-of-tea! :Doh:
     
  9. madbluemad

    madbluemad

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    Sorry Mo. The part about the cuppa is a real bummer.

    Jim
    :Smile:
     
  10. old-mo

    old-mo Funster Extra Special Life Member

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    It is of late I have put the heater in to come on when temp drops below 10deg, which it has a few nights now,, hence the EHU being left on.

    I have also been taught and through finding out to my cost that to leave an internal combustion engine sat for long periods does the valve seals and bores no good.

    Hence my question regarding starting when on EHU, I now know that it does or is likely to cause damage..

    Even though because of what "Scotjimland" has said I am pretty sure I have the cut out switches/devises Jim spoke of.. Thanks Jim.:thumb:

    So on my fortnightly flash up of the Genny I will disconect the EHU while I run the Genny..

    And thanks to "Geo" I now know it is better to put it under load.. :thumb:

    What may seem stupid questions to some, to me they are all a big learning curve,, Did not have such things in all my European M/Homes nor my Caravans & 5th wheel..

    Good battery`s/EHU/or Genny and that was it. and in our first caravan gas mantle lights and an old "Ubique" open flamed heater,, year 1965.. :Wink:
     
  11. Wildman

    Wildman Read Only Funster

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    the answer is in the original post, if you read it.:Rofl1::Rofl1::Rofl1:
     
  12. madbluemad

    madbluemad

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    Hello Roger

    I see you have managed to retain the sarcastic element of your character.

    It wasnt really and anyway Moandicks answer was a better one albeit they didnt initiate the post.

    Go try find something to complain about.

    Isn't Gordon Brown your normal target for irrational abuse.

    Jim
    :Doh:
     
  13. dazzer

    dazzer Read Only Funster

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    Our old RV had a box gizmo that wouldnt let the genny start if the hookup was connected.

    But agree with Jim about running it for an hour with the a/c on. Always a good idea to stretch the legs on both systems once a month
     
  14. madbluemad

    madbluemad

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    Hi OldMo
    Its not a stupid question which is why I asked why you would do it. Now we all know.
    Jim
    :Wink:
     
  15. Snowbird

    Snowbird Funster Life Member

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    Hi, my old Tiffin has a black box in a locker with a three pin UK socket comming out so you can use 220 volt on the outside from either the genny or EHU.This box also automaticly switches power from mains or genny. Dont know how it works but it does. The RV was imported new into the UK so therfore has no 110 volt. All appliences are 220 volt.Wiffy did once start genny when we had hookup,only through chance to use microwave and no damage was done,so whatever is in the black box certainly works.
     
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