hymer1942 Posted January 5, 2011 Share Posted January 5, 2011 Afternoon all, I have just fitted a new pump to my system and it works to a degree, hot at the boiler, hot at the resovoir [ at the rear in the wordrobe ], but only warm at the front of the van. My first thought is it might want bleeding, there are 2 what I assume to be bleeders behind the front seats, I have opened both one after the other and got only water. Does anyone know if there is a correct way to bleed, or do I just need to let a lot of water though the system. Thanks in advance Barrie Link to comment Share on other sites More sharing options...
747 Posted January 5, 2011 Share Posted January 5, 2011 I presume you mean an Alde system. There are numerous bleed points on the rads. You will probably have to bleed all of them several times to get a result. Link to comment Share on other sites More sharing options...
hymer1942 Posted January 5, 2011 Author Share Posted January 5, 2011 Thanks 747, yes it is an Alde system, but just 2 small rads behind the front seats. I will do as you say and bleed them several times and see if I can get it a little hotter at the front. Barrie Link to comment Share on other sites More sharing options...
Clive Posted January 5, 2011 Share Posted January 5, 2011 I wondered where you were going with two bleeders behind the front seats. Most of us call them children! (or inlaws) You may need to apply a little water pressure to clean any trapped bubbles, and make sure you are parked level when you do it. Good luck C. Link to comment Share on other sites More sharing options...
Clive Posted January 5, 2011 Share Posted January 5, 2011 I wondered where you were going with two bleeders behind the front seats. Most of us call them children! (or inlaws) You may need to apply a little water pressure to clean any trapped bubbles, and make sure you are parked level when you do it. Good luck C. Link to comment Share on other sites More sharing options...
hymer1942 Posted January 5, 2011 Author Share Posted January 5, 2011 Clive - 2011-01-05 5:13 PM I wondered where you were going with two bleeders behind the front seats. Most of us call them children! (or inlaws) You may need to apply a little water pressure to clean any trapped bubbles, and make sure you are parked level when you do it. Good luck Hi Clive and thanks, how does one apply pressure beyond that of the pump. Barrie C. Link to comment Share on other sites More sharing options...
Brian Kirby Posted January 5, 2011 Share Posted January 5, 2011 Also, as it's winter, do remember that every time you bleed the system you need to top up the reservoir, and that you should not top up with water alone (or tap water) as you will dilute the anti-freeze, and a frozen Alde system you do not want! :-) Link to comment Share on other sites More sharing options...
Clive Posted January 5, 2011 Share Posted January 5, 2011 Its easiest to just top up with neat anti-freeze. A bicycle pump full of the stuff could purge a few bubbles through?. Thankfully our Alde system has not needed any such encouragement. C. Link to comment Share on other sites More sharing options...
747 Posted January 5, 2011 Share Posted January 5, 2011 I do not kinow if your Hymer is an A class, B class or C class. If it has an overcab (or even with a drop down bed) there may be airlocks there or elsewhere. If it has a double floor then it will have rads with bleed nipples. I am stressing that any air anywhere in the system will affect its efficiency. The best place to get rid of air is the highest point in the system. Bleed a bit then run the pump. better still, take the van for a short run (up hill and down dale) to move the airlock. I recently drained my system down and renewed the antifreeze mix and it took a while to get it bled properly. I found radiators (and bleed nipples) I did'nt even know I had. For instance did you know you have a rad in the toilet cassette compartment? I do, I have just found it. ;-) Link to comment Share on other sites More sharing options...
Derek Uzzell Posted January 6, 2011 Share Posted January 6, 2011 My understanding is that earlier Alde systems could be pigs to bleed properly. There's some information on Pages 60-68 of the following Swift caravan handbook that MIGHT help, though I suspect it's just a copy of Ade's own documentation: http://tinyurl.com/38dao5x Link to comment Share on other sites More sharing options...
hymer1942 Posted January 6, 2011 Author Share Posted January 6, 2011 Morning and thanks again to all. I have a S Class 650 and up to now can only find 2 radiators one each behind the 2 front seats. I shall move some furniture later to see if I have any more. There is not one in the bathroom, and the highest point in the system is the reservoir in the wordrobe. Barrie Link to comment Share on other sites More sharing options...
747 Posted January 6, 2011 Share Posted January 6, 2011 Hi Barrie, I know very little about Hymers so I am none the wiser for your info. :-S Try opening the outside door to your cassette locker and have a feel above it. That is where a rad is on mine. I had often wondered why it was warm in the bathroom. :-D There is some good info on the Alde website, showing typical schematic circuits etc. If you have a rear fixed bed, there may be one (or two) radiators tucked away there. They are fairly high on mine and each has a bleed nipple. I got a great deal of air from them on my initial bleeding. I also have two small radiators behind the front seats and I use them as my benchmark to see how I am getting on with the bleeding. They never get truly hot until the air is gone. Link to comment Share on other sites More sharing options...
hymer1942 Posted January 6, 2011 Author Share Posted January 6, 2011 Thanks again 747, I have just in the last hour got a result, after bleeding several times and now have a really hot rad behind the front seats. So thanks once again for everyones input. Leave for Spain next week. Barrie Link to comment Share on other sites More sharing options...
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