TRUMA C4002 HEATER - IF IT HAVE A PROBELM?

[PROADAM]

Hi All. 
I hava a Truma C 4002 Hetar in my Hymer B510.

Last year was the first time that i used it for a trip. Than it works well. Nothing happened. I parked it for a half year and now cos the cold weather is coming, i start to burn up my Truma heater. Couse another cleaning, repairing projects of the water tube system, the interior boxes shelves were disapart around the heater.

Today, when i just take a test ride, and even check the whole water system and my hand touch the accidently the aluminum bottom part of the heater, where the heater blowing out the air on that 4 tube part. And it as REALLY HOT!! It is burn my hand in a secound! 

I'm not sure if it is. is it working correctly? The gas line enters the system there, and the water heater is also there. 

And not far from it, the flame burns inside and heats the water. So it's possible that this is normal, come to think of it. 

However, it was so hot that it could have burned my hands worse. Of course, it was covered by the furniture before and I didn't touch this part. 

I set the heater to make water at 40 degrees. As before, it prepared the water in 20p and stopped. I did not measure the temperature of the water. 

My question is, is it proper operation that the bottom of the stove is so hot there? 

Is it normal because the combustion chamber is 15 cm deeper and the whole thing is a common aluminum unit and therefore it overheats, or could there be something wrong with the system that it is so hot?!

I cant count the celsius! It is hot that like.. when you touch, you have to take away your hands from there inmadietly.

[Keithl]

Hi @PROADAM I'm afraid I don't fully understand your problem but if the heater is not working correctly then you need to find a Truma qualified engineer to investigate further.

[rayc]

2 hours ago, PROADAM said:

Hi All. 
I hava a Truma C 4002 Hetar in my Hymer B510.

my hand touch the accidently the aluminum bottom part of the heater, where the heater blowing out the air on that 4 tube part.And it as REALLY HOT!! It is burn my hand in a secound! 

and not far from it, the flame burns inside and heats the water. So it's possible that this is normal, come to think of it. 

 

I guess it is normal as the 4kw gas combustion burner is adjacent.  

Edited October 7 by rayc

[PROADAM]

On 07/10/2024 at 18:51, Keithl said:

Hi @PROADAM I'm afraid I don't fully understand your problem but if the heater is not working correctly then you need to find a Truma qualified engineer to investigate further.

My problem is that the lower, aluminum part of the boiler, where the air vents are, feels too hot. 

I couldn't experience this before. 

It's just weird to me, but maybe it's completely normal. 

I have a question to make sure where I should go next.

The Truma service step is of course a logical idea. 

I called 3 as well.

My problem is that there is now a one-week training course here and none of the companies can accept it. In Mikoz, the companies give the earliest appointment for 2 weeks after that. 

I want to go on a 3-month trip with my family on Friday.

[rayc]

related topic https://www.motorhomefun.co.uk/forum/threads/urgent-truma-combi-boiler-help-please.130751/

[Derek Uzzell]

Two of my motorhomes had Truma Trumatic-C combination air/water heaters - a C-3402EL (3.4kW output) and a C-6002EH (6.0kW output when running on gas). The C-4002 heater was a development of the C-3402  with a maximum output of 4.0kW.

It is obvious from the design of a Trumatic-C heater that its aluminium underside (where the air trunks connect to) will heat up when the heater is running. I never experimented to  check how hot the underside would become, but it wouldn't in the least surprise me if if the temperature reached would be sufficient to burn a hand if touched accidentally.

This image shows how close to the heater's underside the gas-burner is.

As mentioned in the MotorHomeFun 2016 forum thread rayc gave a link to, there was a widespread recall of Trumatic-C heaters in the early 2000s (my 2005 C-6002EH was affected) but this related to a manufacturing fault with the heater's top section, not the base.

As also advised in the MotorHomeFun 2016 forum thread, these heaters can get VERY hot (particularly in 'Summer' water-heating-only mode). I'm confident this would be considered perfectly normal by Truma and their advice would likely be to ensure there is plenty of air-space around the heater's base and not to touch the base when the heater is running.

(Truma's fitting advice for Trumatic-C heaters was - in order to ensure the heater had adequate ventilation to operate efficiently and minimise the risk of overheating - the heater should not be installing in a poorly ventilated location. Hymer had a well-known reputation for ignoring that guidance...)

[PROADAM]

4 hours ago, Derek Uzzell said:

Two of my motorhomes had Truma Trumatic-C combination air/water heaters - a C-3402EL (3.4kW output) and a C-6002EH (6.0kW output when running on gas). The C-4002 heater was a development of the C-3402  with a maximum output of 4.0kW.

It is obvious from the design of a Trumatic-C heater that its aluminium underside (where the air trunks connect to) will heat up when the heater is running. I never experimented to  check how hot the underside would become, but it wouldn't in the least surprise me if if the temperature reached would be sufficient to burn a hand if touched accidentally.

This image shows how close to the heater's underside the gas-burner is.

As mentioned in the MotorHomeFun 2016 forum thread rayc gave a link to, there was a widespread recall of Trumatic-C heaters in the early 2000s (my 2005 C-6002EH was affected) but this related to a manufacturing fault with the heater's top section, not the base.

As also advised in the MotorHomeFun 2016 forum thread, these heaters can get VERY hot (particularly in 'Summer' water-heating-only mode). I'm confident this would be considered perfectly normal by Truma and their advice would likely be to ensure there is plenty of air-space around the heater's base and not to touch the base when the heater is running.

(Truma's fitting advice for Trumatic-C heaters was - in order to ensure the heater had adequate ventilation to operate efficiently and minimise the risk of overheating - the heater should not be installing in a poorly ventilated location. Hymer had a well-known reputation for ignoring that guidance...)

OH! Thanx a lot. 
What you wrote is reassuring, that this hot is normal. 
Even you are right! The Hymer now is built it into a fully closed box, which are can not breathing. 
Maybe i will build in an additional fan for it!

[Derek Uzzell]

This link is to Truma's installation Instructions for the Trumatic C-4002

https://www.manualslib.com/manual/1091000/Truma-Trumatic-C-4002.html?page=8#manual

and the instructions include the following guidance.

These heaters are designed to suck in cool air from within the motorhome, heat up that air and circulate the warmed air back into the motorhome's living-are through flexible trunking. For efficient operation, the heater must be installed so that the fan that sucks in the cool air can do this easily, but that is often not the case.

My first motorhome's Trumatic C-3402 heater was retro-fitted and had to be installed in a tightly-fitting cupboard directly beneath a wardrobe. I replaced most of the cupboard's door with wire mesh and did the same with the base of the wardrobe. This allowed the Truma heater to 'breathe' easily through the door and also warmed up clothes in the wardrobe - which was nice on cold mornings.

UK Truma technicians used to hate Hymer motorhomes and, even if a problem with a Trumatic-C heater qualified for an under-warranty repair, the amount of work and time needed to remove the heater (and the cost of doing this) was normally not covered by the warranty. 

My second motorhome was a 2005  Hobby T600 FC and its Trumatic C-6002EH was located under a fixed rear bed.  Although this was OK for ventilation and keeping the heater cool, when the subsequent recall needed to be done, removing the top of the heater would have been impossible. Fortunately, having already needed to completely revise the installation owing to Hobby making a major mistake when they manufactured the vehicle, I had anticipated this and had made a (fairly simple) modification to the bed frame that Hobby could have done if they had put a little more thought into the build.

[rayc]

The C6002 in my Rapido was mounted in the kitchen unit. When the electric elements had to be replaced the kitchen unit had to be dismantled including removing the oven. You could just about get at the electric reset  button via  a small door in the MH wall.

[onecal]

Hi

It sounds like you are afraid to use the appliance ! Had you any real issues with the appliance previously ?

I have no idea how long you may have used the motorhome for but if you have concerns about the appliance and are not happy using it ,then the best advice is get a Truma engineer to look at it and hopefully put your mind at ease . I personally would advise not to use the appliance if you are so unsure.  Get it fully checked out by at least qualified  gas certified tech if a Truma engineer is not available or unable to advise.as you say you wish to go on holidays on friday You can always ring them or contact them on .

 +49 89 4617-2020 Monday – Thursday: 09:00 am – 4:30 pm Friday – Saturday: 8:00 am – 1:00 pm or email technical@trumauk.com    for advice.

Regards

Edited October 9 by onecal
Info

[PROADAM]

On 09/10/2024 at 12:57, onecal said:

Hi

It sounds like you are afraid to use the appliance ! Had you any real issues with the appliance previously ?

I have no idea how long you may have used the motorhome for but if you have concerns about the appliance and are not happy using it ,then the best advice is get a Truma engineer to look at it and hopefully put your mind at ease . I personally would advise not to use the appliance if you are so unsure.  Get it fully checked out by at least qualified  gas certified tech if a Truma engineer is not available or unable to advise.as you say you wish to go on holidays on friday You can always ring them or contact them on .

 +49 89 4617-2020 Monday – Thursday: 09:00 am – 4:30 pm Friday – Saturday: 8:00 am – 1:00 pm or email technical@trumauk.com    for advice.

Regards

Hi. 
I never have any issue with this before. 
And i also never ues it as run without the wardrobe box furniture part. 
In this time i take a test run.
The boxes was opened. 
I fixed some part of the water pipe system. 
My hand touch the bottom part of the aluminum. 
And i just was surprised by the burning hot feeling. 

And i took a question for pros!! 😄

[Derek Uzzell]

Suggest you copy this label and fix it close to your heater.

 

[Brian Kirby]

Given all that Proadam has said, he is clearly uneasy that either the heater installation, or the heater itself, may be deficient.  Given that, the most certain route to peace of mind would be to get a Truma engineer to test and inspect it or, if the option is still available and practical for Proadam, to take it to Truma UK themselves.  Service website here:  https://www.truma.com/gb/service/

It might also help if Proadam could give an idea of where he lives, as Truma space and water heaters are installed in almost all motorhomes, so someone is likely to be able to recommend a service provider near to him from personal experience.

[Derek Uzzell]

PROADAM lives in Hungary...

[onecal]

Hi,

Szerintem tudnak majd tanácsot adni

They should be able to advise ,

KEMPINGVILAG KFT

ÚJHEGYI ÚT 7, BUDAPEST,
1479, HU

 +3612641634

[Brian Kirby]

The best I could achieve was a "google" search for Truma szerviz magyarország.  The result suggests that Truma do not have a national agency in Hungary and that Proadam would have to refer his concerns to a local Truma dealership rather than directly to a Hungarian Truma office. 

I assume from his comments above, regarding non-availability of assistance due to training, that he has already done his research but cannot get assistance to suit his timescale. 

Maybe Austria would be a more fruitful alternative if he can negotiate the language barrier.  🙂 I couldn't find an Austrian Truma office, but noted that the Putsbrunn, near Munich, Truma service centre offers direct manufacturer repair for Truma products by appointment - which doesn't seem likely to be of much help!  However, depending on Proadam's travel plans, it might be a feasible alternative, or may be able (if necessary, via Google translate), to suggest alternative sources closer to home?

[onecal]

Hi

One of our members used KEMPINGVILAG KFT ÚJHEGYI ÚT 7, BUDAPEST,1479, HU some years ago when they had a difficulty with their Truma heater during a very cold winter out there They found them very helpfull on obtaining a part for their heater. They assure me they have a service centre for same .  Hopefully they may be able to help to advise  PROADAM and hopefully put his mind at ease .

Phone No 3612641634

Regards

Edited Sunday at 19:00 by onecal
Phone No

[Derek Uzzell]

I hesitate to point this out, but on Tuesday October 9 PROADAM said he was planning to go on a 3-month trip with his family beginning on Friday October 11.

So continuing to advise him to seek advice from a Truma specialist before using the heater (which he said he had already tried to do) is a mite academic if - as seems probable - he has already started the trip.

[onecal]

Hi

Maybe we are ? but then he maybe still reading here.?

l also messaged back before he left on Friday on his tour a contact number for him so as he  may have received and accepted some asssurance from same before travelling hopefully.

+49 89 4617-2020 Monday – Thursday: 09:00 am – 4:30 pm Friday – Saturday: 8:00 am – 1:00 pm or email technical@trumauk.com    

I had no idea where at that time of my posting where he was living, So hence my update from fellow members who spent some time in Budapest some years back and recommended the good service they received back then

Maybe he may get to use it on his return or simply ring that number i provided within his three month trip  from wherever he may be and get reassurance in his first language re his Truma heater  Hopefully he has a lovely holiday.

Szerintem tudnak majd tanácsot adni.

KEMPINGVILAG KFT ÚJHEGYI ÚT 7, BUDAPEST,1479, HU

 +3612641634

Regards

[onecal]

Hi PROADAM

I see you are still reading , I hope my contact number was able to help you as it did with our members when they were visiting your country and put your mind at ease with your Truma heater 

Látom, még mindig olvasol, remélem, a telefonszámom segíthetett neked, akárcsak tagjainknak, amikor az Ön országában jártak, és megnyugtatta a Truma fűtőtestét.

Regards