Guest john1215 Posted February 25, 2005 Share Posted February 25, 2005 A while ago I saw postings about the sensors fitted to vans that have Truma heating systems. The posts concrened the thermostat cutting out when the required temp was reached but then not cutting back in when temp dropped because the sensor had been fitted in the wrong place. I used my space heater this weekend at Hebden Bridge. It was cold (the water froze in the aqua roll and wastemaster) but even on full power the heater never cut out on the thermostat, in fact it was too warm at times - worked too well, where would my thermostat be on a Lunar Ultima(Lexon) EB? john1215 Link to comment Share on other sites More sharing options...
PhilB Posted February 25, 2005 Share Posted February 25, 2005 John, For the most part the problem is because most vans don't have the remote sensor fitted. I fitted one myself last March so this winter is the first with it and I must say it has worked a treat. It has kept the temp between about 19 to 22 degs and with the fan set midway it has been great - snug as a bug. If a remote sensor is not fitted the system uses the sensor that is fitted inside the thermostat unit, mine was down on the floor set in one of the forward bed box fronts and with the adjacent airvent open it was getting a blast from it. I suspect that your van will only be working on the one fitted in the thermostat unit. Phil Link to comment Share on other sites More sharing options...
Guest john1215 Posted February 25, 2005 Share Posted February 25, 2005 Is the sensor in a place that I can see easily, what does it look like? john1215 Link to comment Share on other sites More sharing options...
PhilB Posted February 25, 2005 Share Posted February 25, 2005 Now there's a question ^_^ The remote sensor is small and black about the diameter of a coat button and forming a hemisphere. It is probably fitted under a cupboard or pelmet around the seating area. If you can easily get to the back of the heater it is possible to see if there is a wire plugged into the control unit but this is behind the alli panel fitted behind the heat exchanger and under the fan unit on the left hand side looking at the front. HTH Phil Link to comment Share on other sites More sharing options...
Paul_B Posted February 25, 2005 Share Posted February 25, 2005 The problem is when you turn the temperature down to No 3 it will turn off, but will not turn back on itself, you have to physically turn it back on. On full it never reaches turn off point, so not a problem The problem is more involved than the sensor. Gary of Arc Systems has got it worked out, he knows more about them, than Truma. Paul ps: thanks Gary for your help Paul B . .......Mondeo Estate & Elddis Avanté 505 (Tobago) Link to comment Share on other sites More sharing options...
Guest john Posted February 25, 2005 Share Posted February 25, 2005 on my bailey it under unit thats above your head on seating area on doorside of van Link to comment Share on other sites More sharing options...
Guest john1215 Posted February 26, 2005 Share Posted February 26, 2005 The problem is when you turn the temperature down to No 3 it will turn off, but will not turn back on itself, you have to physically turn it back on. On full it never reaches turn off point, so not a problem The problem is more involved than the sensor. Gary of Arc Systems has got it worked out, he knows more about them, than Truma. Paul ps: thanks Gary for your help 13267[/snapback] Maybe Gary of Arc Systems will take a peek in here and impart his knowledge. john1215 Link to comment Share on other sites More sharing options...
Paul_B Posted February 26, 2005 Share Posted February 26, 2005 Maybe Gary of Arc Systems will take a peek in here and impart his knowledge. John, try your heater on low on the 2000 setting, and see if you have a problem, try it for a while just to see if it turns back on. If it does turn back on you are ok, if not let us know. Paul Paul B . .......Mondeo Estate & Elddis Avanté 505 (Tobago) Link to comment Share on other sites More sharing options...
ksugden Posted February 27, 2005 Share Posted February 27, 2005 The sensor on our Coachman is above the entrance door the sensor only works when useing electric. last weekend we were away in the Yorkshire Dales we had snow on Friday and Saturday nites and it was very cold out. we stayed 3 nites on Friday and Saturday they were several other vans on the site the heater kept the van warm but never turned its self off. on sunday hite we had the site to our selves and had to turn the heating down, but it was no warmer outside. I can only assume that we were not getting our full quoter of electric on Friday and Saturday. So dont assume that your heater is working to its full capacity just because you have it on the 2000 setting. As it can obviously be affected by the amount of current avalible at any given time, which may be less than advertised by the site, Link to comment Share on other sites More sharing options...
X-Bob Posted February 28, 2005 Share Posted February 28, 2005 The sensor on our Coachman is above the entrance door the sensor only works when useing electric. 13635[/snapback] The instructions that come with the remote sensor say that this is the best place to put it. Link to comment Share on other sites More sharing options...
Arc Systems Posted February 28, 2005 Share Posted February 28, 2005 Maybe Gary of Arc Systems will take a peek in here and impart his knowledge. john1215 13389[/snapback] What can I say that has all been said before? but here are some thought's assuming the remote temperature sensor is fitted Ksugden brings up a point that fits nicely with what I said before, "if the heater never comes up to temperature it will not switch off and therefore will keep the van warm". Whether this is due to low site voltage or the heater set on a lower output is unimportant but the result stays the same. ..the heater does not switch off. If it works as 'designed' then the control will switch on and off with a 2deg variation in temperature regardless of output setting or input voltage, this is evidently not the case in many instances It would seem that there is a new control board being fitted which it would appear works well, I have yet to see one so don't know what if anything has been done. One more thought on this subject, if anyone can explain the logic of fitting the remote sensor above the door at high level. ..please do because it is beyond me. The main problem I have with this topic though, is I make my living from solving problems and fixing Carver products, something Trauma make harder by limiting spares to what they can get away with. ..rather than what the market demands!. While I love to solve problems, Trauma you would have thought. ..should solve their own? Arc Systems are specialist Carver caravan product repairers, committed to providing a comprehensive service as well as spare parts for these popular heaters. Link to comment Share on other sites More sharing options...
X-Bob Posted February 28, 2005 Share Posted February 28, 2005 One more thought on this subject, if anyone can explain the logic of fitting the remote sensor above the door at high level. ..please do because it is beyond me. 13687[/snapback] The only thing I can think of Gary is that this is the coldest part of the van and is probably not going to be influenced by other heat sources here. Therefore the temp of the van is governed by the coldest part of it. Very often in a house the thermostat (sensor) which controls the central heating is positioned in the hall or at least as far from any gas fires as possible. Link to comment Share on other sites More sharing options...
Frank.A Posted February 28, 2005 Share Posted February 28, 2005 The only thing I can think of Gary is that this is the coldest part of the van and is probably not going to be influenced by other heat sources here. Therefore the temp of the van is governed by the coldest part of it. Very often in a house the thermostat (sensor) which controls the central heating is positioned in the hall or at least as far from any gas fires as possible. 13710[/snapback] I can't see any sense in placing the sensor over the door. There is a temperature gradient in any room and it is cold at floor level and warm at ceiling level. A natural circulation is set up if there are cold sufaces such as windows. A sensor position closer to the floor than the ceiling would make more sense. There is usually a radiator in a hall or any other room that a thermostat is sited. As long as the correct sizes of radiator are installed and the correct temperature fall across the radiators is set,then the thermostat should correctly control the heating. If the thermostat was in a room with no heating,the heating would run continuously. Frank Link to comment Share on other sites More sharing options...
X-Bob Posted February 28, 2005 Share Posted February 28, 2005 A sensor position closer to the floor than the ceiling would make more sense. If the thermostat was in a room with no heating,the heating would run continuously. Frank 13721[/snapback] Domestic CH thermostats are not mounted at floor level. With respect Frank I think you may be contradicting yourself here - if you put the sensor at floor level (colder area) wouldn't that cause the heating to stay on longer? Surely in such a small space as a caravan it does not really matter (within reason) where the sensor is placed - if you adjust the temp control knob to a comfortable setting for you, that should be fine. It's only when you get extreme situations like relying on a temperature sensor in the airflow from the warm air vent that it gives problems. Link to comment Share on other sites More sharing options...
Frank.A Posted February 28, 2005 Share Posted February 28, 2005 Domestic CH thermostats are not mounted at floor level. With respect Frank I think you may be contradicting yourself here - if you put the sensor at floor level (colder area) wouldn't that cause the heating to stay on longer? Surely in such a small space as a caravan it does not really matter (within reason) where the sensor is placed - if you adjust the temp control knob to a comfortable setting for you, that should be fine. It's only when you get extreme situations like relying on a temperature sensor in the airflow from the warm air vent that it gives problems. 13728[/snapback] Hi Bob, I didn't say put the sensor at floor level,but nearer the floor than the ceiling. By trial and error there must be a location where air ciculation will switch the heater off and then as the residual heat rises the temperature at a lower level will fall sufficiently to switch the heater on again. If the sensor is high up in the area where the hot air will remain longest,the heater won't be switched on until the air at the lower level is much colder. This is one of the problems that is being experienced,the heater switches off and doesn't come on again. I have put together a remote sensor and intend to try it in the van in the next few weeks. This is one of the drawbacks of not having the van at home. Frank Link to comment Share on other sites More sharing options...
Rostrevor Posted February 28, 2005 Share Posted February 28, 2005 on my bailey it under unit thats above your head on seating area on doorside of van 13268[/snapback] On my Bailey Bordeaux, the sensor is factory fitted under the vanity unit in the bedroom. Enjoy yourself, whatever you're doing RAV4 Pegasus 534 Link to comment Share on other sites More sharing options...
mick1949 Posted February 28, 2005 Share Posted February 28, 2005 Just tried the van out for a week after a remote thermostate was fitted(under warranty i might add) It was placed by the door about 18inchs down from the ceiling 12inchs in from the wall. A totaly sucsesful job as well,the temprature is now constant at all settings and all amp settings also. Well chuffed. Link to comment Share on other sites More sharing options...
klyne Posted February 28, 2005 Share Posted February 28, 2005 Gary Interested in your reply and would like to ask a question. In my previous van I had a Carver Fan Master which worked really well, even on 500watts. Now have a van with the Ultra Store heater and it struggles to keep the van warm on 1000 watts. Can you explain what the difference is and why things are like they are? Thinking of getting a remote sensor fitted at my first service. David David - Milton Keynes Bailey Alliance 66-2 Motorhome for holidays and a Kia Niro HEV for home. Caravan Travels Link to comment Share on other sites More sharing options...
Paul_B Posted February 28, 2005 Share Posted February 28, 2005 Snip It would seem that there is a new control board being fitted which it would appear works well, I have yet to see one so don't know what if anything has been done. One more thought on this subject, if anyone can explain the logic of fitting the remote sensor above the door at high level. ..please do because it is beyond me. The main problem I have with this topic though, is I make my living from solving problems and fixing Carver products, something Trauma make harder by limiting spares to what they can get away with. ..rather than what the market demands!. While I love to solve problems, Trauma you would have thought. ..should solve their own? 13687[/snapback] Gary, You can look at mine at easter We will be at Huttoft (Ill send a pm) Paul Paul B . .......Mondeo Estate & Elddis Avanté 505 (Tobago) Link to comment Share on other sites More sharing options...
Guest john1215 Posted February 28, 2005 Share Posted February 28, 2005 I've had a look around the van and cannot see anything that resembles what was described ealier. Will the location of the sensor, if fitted, be detailed in any of my manuals or books? john1215 PS Thanks for all of your replies, they have all been useful info. Link to comment Share on other sites More sharing options...
mark70 Posted February 28, 2005 Share Posted February 28, 2005 On my 2005 Avante the remote sensor was already fitted by the door approx 18 inches above the floor as per the instructions and it works well. Link to comment Share on other sites More sharing options...
X-Bob Posted March 1, 2005 Share Posted March 1, 2005 Just tried the van out for a week after a remote thermostate was fitted(under warranty i might add) It was placed by the door about 18inchs down from the ceiling 12inchs in from the wall. A totaly sucsesful job as well,the temprature is now constant at all settings and all amp settings also. Well chuffed. 13752[/snapback] I would second this. I fitted the remote sensor on the side of the top cupboard (drinks/bottle/cocktail cabinet) adjacent to the outside door. It's in line with the top of the door and in the middle of the side wall of the cupboard. This position was chosen based on the instructions that came with the sensor and also the ease with which the cable could be routed back to the fire. It works perfectly - tried it out last November and the temperature at every setting is very stable. Going on this experience the position of the sensor is fine. Cheers Link to comment Share on other sites More sharing options...
Yossa Posted March 1, 2005 Share Posted March 1, 2005 The heating in our van used to cut out and wouldn't come back on. After much good advice from members on the 'old' forum, we had a heating sensor retro-fitted under warranty by a Bailey main dealer. The senor is fitted on the side of the bed, just by the water heater switch. I guess the position is OK as the heating works just fine now. Yossa 2007 Mondeo 2. 2 TDCi & 2003 Bailey Pageant Bordeaux Link to comment Share on other sites More sharing options...
dacamper Posted March 1, 2005 Share Posted March 1, 2005 On my 2005 Avante the remote sensor was already fitted by the door approx 18 inches above the floor as per the instructions and it works well. 13827[/snapback] Our Avante 524 has the cooker fitted next to the doorway, is yours the same. I was a bit reluctant to fit the remote sensor there because I was worried the heat from the cooker would influence its operation. Link to comment Share on other sites More sharing options...
PhilB Posted March 4, 2005 Share Posted March 4, 2005 The instructions that came with my remote recommended fitting it under the pelmet which I did. This winter, the first since fitting, it has maintained a very steady temperature between 19. something and 22ish (I have a digital max/min thermometer) and for the first time I haven't had to use up the gas fire. I have it set to 2kw and I haven't had to adjust the thermostat and leave it like that 24/7, with the blower set to the midway position I get an even temperature spread without the cold spots I enjoyed last winter. Phil Link to comment Share on other sites More sharing options...
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