Truma Heating/Hot Water Drain Valve

[Deleted member 33454]

Haven't had the Truma Frost control drain the tank, mainly because I had already drained it but our tank sits inside the van on the same floor level as the Truma and a combination of gravity and syphon would definitely cause the tank to dump most of its contents. We don't have a pressurised pump system so that wouldn't affect the situation.
Normally for winter use we are only out a couple of nights so as soon as frost is forecast we drain the system and carry a 10 litre bottle of water, generally satisfies our needs.


Clive :juggle:

 

[Touringtheworld]

Funny you should say that......

I went around ours on Tuesday opened all the taps on everything. As a precaution rang the van builder about the Truma and its ability to dump at 4 degrees, he replied "don't worry about that we have fitted a manual tap because they are a pain the bum, just flick it up, jobs a good 'un" The van was brand new this year, I'm glad I phoned them.

I await any other little mods as they come along.

 

[Sharon the Cat]

I have this in my laika the only time it's a problem is filling from empty but just put the heating on when filling & it's fine, I keep the water heater on at low in this weather all night, as the boiler is under the bed & keeps it nice& warm& doesn't use much gas, 2 nights away this week I used £1.08 in gas & water was not of

Might try that tonight as it's under my side of the bed.

 

[oldpolicehouse]

Thats interesting to know than you can run the heating without any water.
I had a look at my 03 Rapido the other day and had it plugged into the mains and went to switch the heater on and the lights did not come on in the control dial.
Looked at the valve and it has opened, I pulled it closed, tried the heating again and it fired up, but I was worried because steam started to come out of the vent, obviously from a little water in the system.

Hello
Yes it's definitely no problem.
I've bought 2 Rapidos from Wokingham Motorhomes
I went out to the van one cold and frosty morning and the boiler safety valve had opened.
I scratched my head for a while wondering how I was going to get it to stay shut.
I rang Paul (a really helpful guy)at Wokingham Motorhomes. He said straight out " fire up the heating " I said "but there is no water in the boiler"
Does'nt matter he said.
I don't think he would have given me this advice on a fairly new motorhome still under warranty unless he was sure it was ok.

Blue Skies

 

[Sharon the Cat]

Hello
Yes it's definitely no problem.
I've bought 2 Rapidos from Wokingham Motorhomes
I went out to the van one cold and frosty morning and the boiler safety valve had opened.
I scratched my head for a while wondering how I was going to get it to stay shut.
I rang Paul (a really helpful guy)at Wokingham Motorhomes. He said straight out " fire up the heating " I said "but there is no water in the boiler"
Does'nt matter he said.
I don't think he would have given me this advice on a fairly new motorhome still under warranty unless he was sure it was ok.

Blue Skies

It is quite clearly stated in the manual.

We want to fill our tank today, so we closed the valve & to keep it closed we have upgraded to the deluxe clothes peg and binned the mkI cable tie.

 

[daveg]

I've just suffered from the system draining down on our, new to us, Hymer. A large'ish wire paper clip, opened out a bit, fits nicely in the groove at the bottom of the drain button and holds it shut. I couldn't find a deluxe peg strong enough to hold it

 

[seadogjon]

hi all,,is this drain valve usually right by the boiler.cant find it any where ,theres a pipe sticking out under van ,like adrain but seems to disapear under the boiler.after a hard frost last night (minus 1 in static) no water was dumped out,got a drain valve on fresh water tank but cant find the boilers,,going wild all december so dont want to knacker it now.any clues,

 

[iampatman]

Same van, same problem

Hi Sharron,
I think we have the same van, a Lunar Premier 592? Exactly the same thing happened to us a week or so ago. We were in France and the van was parked up for a few days at our daughter's house with the water tank empty. We filled up before we left and it was pretty cold, an hour or so down the road we stopped for a cuppa and water was pouring out. Lifted the bed, hit the switch and it just kept popping up again!!! Eventually it closed but we'd lost nearly a tank full. We filled up a few villages down the road and it hasn't happened again 'cos we're living in the van and it's not been below 4deg (although it's pretty nippy tonight in Gandia just It's funny, when we bought the van there was a clothes peg on the floor next to the switch and I thought it must have just fallen in there somehow.
Pat

 

[Sharon the Cat]

Hi Sharron,
I think we have the same van, a Lunar Premier 592? Exactly the same thing happened to us a week or so ago. We were in France and the van was parked up for a few days at our daughter's house with the water tank empty. We filled up before we left and it was pretty cold, an hour or so down the road we stopped for a cuppa and water was pouring out. Lifted the bed, hit the switch and it just kept popping up again!!! Eventually it closed but we'd lost nearly a tank full. We filled up a few villages down the road and it hasn't happened again 'cos we're living in the van and it's not been below 4deg (although it's pretty nippy tonight in Gandia just It's funny, when we bought the van there was a clothes peg on the floor next to the switch and I thought it must have just fallen in there somehow.
Pat

Hi Pat
Yes same van. To reset the valve when temp is below 8 degs just switch the heating on. It works without water.
I downloaded a copy of the manual from the Truma site.

 

[lotty]

Our Truma boiler recently dumped the water on a cold night a couple of weeks ago. I didn't realise until I used the van and filled up with water only for it to come out from under the van as it was filling, lol.
We pulled up the drain switch, filled up and off we went.

The problem we have now is that it doesn't seem to have sealed? Every time I use a tap or the toilet flush, water comes out of the boiler under the van?? Can anyone advise on what I can try to stop it?

It is not effecting the use of the heating or taps, just p-ing water out?

Thanks
Lotty