hammer Posted June 17, 2017 Share Posted June 17, 2017 My gas regulator seems to have failed with no gas getting past it (full cylinder). It is a truma monocontrol cs. I have pressed and held the green reset button several times with no improvement. I guess a new regulator is needed. Is it mandatory to have a regulator with crash protection ? We have no intention of having the gas on when driving. Link to comment Share on other sites More sharing options...
Derek Uzzell Posted June 18, 2017 Share Posted June 18, 2017 I note from your previous inquiry http://forums.outandaboutlive.co.uk/forums/Motorhomes/Motorhome-Matters/Security-device-and-Insurance-recommendation/47200/ that you have very recently purchased this vehicle (though you’ve provided no details of its make, model or year of manufacture) and I understand that this is your first motorhome. Are you familiar with the Truma MonoControl CS system that normally includes a specialised gas-hose (‘pigtail’) between the gas-canister and regulator? As described in the relevant Truma Operating instructions https://dealernew.truma.com/_anweisungen/Truma_Katalog/pdf_verzeichnis/50_000/50020_67700.pdf this gas-hose has a rupture-protection button that needs to be appropriately operated, as well a reset button on the regulator. If you are not folowing the procedure advised by Truma, gas won’t reach the regulator, never mind pass through it. Regarding ‘legality’, replacing your Truma MonoControl CS with a different make and/or type of regulator might well conflict with your motorhome’s Type Approval status but (at least where a UK-registered motorhome is concerned) I believe there are no UK laws that would forbid this being done. However, it’s probable that such an approach would involve some work modifying the gas-system installation to accept the different design of regulator. Basically, you don’t HAVE to have a regulator with a crash-sensing capability, but if you do find it necassary to ditch the present regulator it will be simplest to replace it on an exact like-for-like basis. Dare I ask this, but as you’ve only just bought this motorhome, should you not be contacting the vendor about this apparent fault? Link to comment Share on other sites More sharing options...
hammer Posted June 18, 2017 Author Share Posted June 18, 2017 Hi - there is the button on the regulator but unusually there is no additional hose rupture button on the pigtail, rendering the crash protection useless (unless I have the hose protection installed). Again, we have no intention of leaving the gas on whilst in motion. Regarding contacting the vendor - we bought through a broker and during the handover the gas system was working. It also worked during our first trip away, then just stopped working - no gas at all getting through the regulator. I don't know if we would have a claim against the broker/vendor, but for the sake of the cost of a new regulator it is probably not worth the hassle, especially as we need it to be in working order by Thursday! Link to comment Share on other sites More sharing options...
Derek Uzzell Posted June 18, 2017 Share Posted June 18, 2017 As should be evident from the Truma-document link I provided above, a MonoControl regulator is just one component of the system and should be teamed with a means to restrict the gas-flow if a loss of gas-pressure occurs between the gas reservoir and the regulator. Although you don’t have the pigtail with rupture protection, in the event of an accident that triggers the Truma regulator’s crash-sensing mechanism gas-flow ‘downstream’ of the regulator would be cut off - so the crash protection feature is still useful even without the rupture-protection pigtail. I note that you say that you “...have no intention of leaving the gas on whilst in motion”, but there’s always the chance that you will overlook doing this and, when a ‘smart’ fridge is fitted, switching off the gas before travelling becomes very irritating. With identification details of your motorhome still not forthcoming :-( :-( :-( there’s no way of knowing if the lack of an anti-rupture pigtail could be considered a ‘fault’. For example, if a motorhome had an underfloor gas-tank as standard, it might be impracticable to fit that type of hose. The fact that the gas system functioned OK at the handover stage and during your first trip seems academic to me unless you’ve bought the vehicle ‘as seen’ and with no warranty being provided. Although about £90 should buy you a replacement MonoControl CS regulator and it seems you are prepared to cover that cost yourself rather than bother the broker/vendor about it, I’m doubtful that you’d take the same attitude if the much more expensive gas-heater or fridge had suddenly gone wrong. Anyway, that’s your business... If you don’t want to insist that the broker/vendor refund the cost of a new regulator, I believe Truma warrants its products for 24 months. So you might want to explore with them replacement of your regulator under warranty. (These later Truma/GOK regulators have a pretty reasonable reliability record nowadays, leaving the question of why yours has failed and whether the cause might be contaminated gas.) Link to comment Share on other sites More sharing options...
Brambles Posted June 18, 2017 Share Posted June 18, 2017 Have you checked the cylinder shutoff valve and gas actually does comes out of the valve when opened? Sounds like a silly question but even more silly if you put in a new regulator and found the cylinder valve was blocked or indeed not even turned on. Link to comment Share on other sites More sharing options...
hammer Posted June 18, 2017 Author Share Posted June 18, 2017 Brambles - yes gas comes out of the cylinder and gets as far as the regulator but nothing passes through it. When I press the green button on the regulator it springs back (I have been told that I should hear a noise when it resets - I don't). Main culprit is the regulator - yes I could pursue it with the vendor, but I still need this to be sorted by the middle of the week and that isn't going to happen without getting it sorted myself. At some point in the vehicle's history it had gaslow cylinders fitted - I can see the holes where the internal locker fill point was mounted and there is a gaslow branded 90degree elbow on top of the regulator. (I never saw the system and it was not included in the sale). Could be possible that some contamination occurred which has blocked the regulator. Link to comment Share on other sites More sharing options...
PJM Posted June 18, 2017 Share Posted June 18, 2017 I had a similar experience and changed my regulator for a "standard" regulator without any issues. Link to comment Share on other sites More sharing options...
hammer Posted June 18, 2017 Author Share Posted June 18, 2017 Thanks PJM. All sorted now, new regulator and gas is working. Link to comment Share on other sites More sharing options...
Derek Uzzell Posted June 19, 2017 Share Posted June 19, 2017 A couple of MotorHomeFun forum threads that may be of interest: https://www.motorhomefun.co.uk/forum/threads/truma-monocontrol-cs-regulator-and-french-gas-bottles.134966/ https://www.motorhomefun.co.uk/forum/threads/bl-dy-truma-regulator.149252/ It’s perhaps worth emphasising that there is no ‘technical’ requirement that Truma rupture-protection gas-hoses be used with MonoControl/DuoControl CS regulators, nor with the earlier SecuMotion/Drive-Safe type. My 2015 Rapido motorhome’s standard specification included a DuoControl CS regulator and Truma anti-rupture gas-hoses. I replaced the latter with Gaslow stainless-steel pigtails and this made absolutely no difference to how the DuoControl CS device functioned. (Why should it?) It should normally only be necessary to press a CS regulator’s green reset button if the crash-sensor feature has been triggered. (Truma suggests that this might inadvertently happen when a gas cylinder is being replaced and the cylinder is knocked against the regulator.) If the crash-sensor has not been triggered and the reason for gas not reaching gas appliances lies elsewhere (eg. the regulator is ‘gummed up’) pressing the green reset button will have no effect. If the crash-sensor has been triggered, I would expect there to be a brief ‘gassy’ noise when the green reset button is pressed, but no noise if the crash-sensor has not been triggered. If I disconnect a gas-hose (pigtail) on my Rapido, when I reconnect the hose and turn on the gas-bottle, there is a short ‘hiss’ from the regulator. But I have never needed to press the regulator’s green reset button. It’s worth referring to Truma’s instruction document regarding positioning of the regulator and the gas-hose(s) that connect to it. Basically, the higher above the gas-bottle(s) the regulator is the better and the gas-hose(s) must always slope downwards all the way from the regulator’s inlet(s) to the gas-bottle(s). Link to comment Share on other sites More sharing options...
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