Mileo 294 shower problem - help
Hi
We bought the Benimar Mileo 294 last year from Marquis Motorhomes. It has a 4 kw truma combi system. The shower produces hot water for 2 to 3 minutes only. Marquis say that is right and that the boost option does not work on the shower.
Can anyone comment on this can any other benimar owners confirm how long their showers last.
Would be grateful for any advice - thank you
Comments
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as far as I am aware the boost option on the truma system is nothing to do with the shower per say. It heats the hot water to a higher temperature than normal so when mixed with cold you have hot water for longer.
Does the kitchen tap still produce hot water once the shower has stopped, if so I would say the mixer valve is faulty on the shower. If all the hot water has gone i.e. none from any tap and you ahve had it on boost and the boost icon has stopped flashing
to indicate its up to temperature then the problem is with the Truma water heater.Does the boost icon stop flashing at all?
Are you using just electric, if so try it on gas to see if that makes a difference, if so it may be one of the elements has gone U/S.
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Hi.. Thank you for reply... we have tried using the boost with electric and gas mix setting and the boost indicator stays flashing... all the hot water goes from the sink and shower and you do not hear the boiler heating during using the shower... I would
have expected the boiler to be heating once the cold water starts going into the boiler but this doesn't happen.Do you know how long you would expect a shower to last when the boost is up to temperature and mixing with cold water?0 -
We would normally get 2 quickish showers or 1.5 longish ones i.e. Mrs T has a long shower and I get a short one
. Just try it on gas only it as you say should start to reheat once the water is started to be used and using only gas will determine if its the element that is not working.As a footnote ours is a Truma 6 so not sure of the difference, others may help there but the principal is the same just the KW difference I think but once water is up to temp its the same.
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From what you have said in your OP I think you have the ‘Truma Combi 4e’
See: https://www.truma.com/uk/en/heating/combi-4-e.php this has a total water capacity of 10 Litres with an 1800w electric element that takes about 20mins to raise the temperature of the water
from 15c to 60c. So if you take two showers, one immediately after the other in theory you can have 5 litres at 60c each. However 60c is far too hot for the human body and cold will need to be mixed with it, thereby giving a quantity greater than the 5 litres
mentioned above.Now in practice as the hot water is being drawn off it is being replaced in the boiler by cold water and some mixing takes place, thereby constantly reducing the temp of the water available. Even if the element is working from the moment the hot is being
drawn off, 1800w will be insufficient to keep up. (theoretically only 1 litre per 2mins).You say that you only get hot water for 2-3mins.Have you tried measuring the amount of hot supplied at one go as you may actually be drawing off all of the boiler capacity during that time. Although I have no experience of this particular system, 2-3mins
does seem a very short time to me.0 -
If only water is being heated up (during summer operation), a temperature of 60 degrees is reached after around 20 minutes.
If the living area is being heated and the boiler is being operated (during winter operation), a water temperature of 60 degrees is reached after around 80 minutes.
It is possible to heat up the water in electrical operation alone (i.e. entirely without gas). The heating time in electrical operation is around 45 minutes.The above is taken from Q&A's
https://www.truma.com/uk/en/heating/combi-4-e.php
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..."the only difference in the combi 4 and 6 is the power available on gas (4 or 6 kw) and mixed (3.8 or 5.8 kw) power sources.on electric only, either can heat with 900 or 1800 watts"...
I am a little puzzeled as to why the Combined power output is actualy less than that of the Gas alone.
and can you heat the van its-self using Electricity only?PS. I seem to be having some trouble getting this to post tonight
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I am not sure of the logic of the power either I thought on dual fuel it gave the higher output, but yes you can heat the van on electric only but as BB says if you have the water on boost it will prioritise that over heating. On a cold day to warm the van
faster put it on dual fuel and it will heat faster.0 -
Apologies to OP for going a little off topic but, as a non-caravanning relative of mine is about to join the fraternity, I am being asked questions about heating. Surely if the heat output on Gas alone is greater than the Dual output, although the difference is small, the van would heat up quicker on the Gas setting, so do you find this not to be the case?
BoleroBoy. You say that the 4 E only uses 2kw on gas yet Truma in their Technical Details: Rated thermal output claim 2000/40000w, yet quote at: Rated thermal output in mixed operation 3800w. All of which is a little confusing.
I am wondering if theses appliances have the potential for localised internal over-heating issues, due to their design constraints, when dual output is used.
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BoleroBoy
Thank you! Your post above makes perfect sense and is in line with the conclusion I was beginning to come to, as this is the only way the figures can be added together to make Truma’s published totals. I am now more convinced, as I said earlier, that these appliances have the potential for localised internal over-heating issues, due to their design constraints, hence the drop 4kw to 2kw output when dual output is used. Does anyone have a more rational explanation as to why the 4kw Gas & 1800w Electricity elements are not used in conjunction so as to give a total output of 5.8kw?
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That certainly is an answer but if the van of your choice is fitted with the Combi 4 as standard, it would be an expensive one. However it is good to understand exactly just what the potential output of any heating system is and just how it operates, as
this will give you a better idea if it will be able to meet your requirements.0 -
BoleroBoy,
I have no issues with my own heating system, it is as I said in an earlier post that …”a non-caravanning relative of mine is about to join the fraternity, I am being asked questions about heating”… and the fact that this topic came up at very much the same time that has caught my interest.
I have operating experience of separate Warn Air and Water Heating systems and the Alde Wet system but non involving Combi systems in C/vans or MH’s. Once I became involved I just wanted to know all I possibly could. I do like to know and understand just what it is that is going on behind the scenes with such appliances.
Many thanks again for your input .
JCB4x4
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