Will my Truma Boiler dump the water if it gets cold

S

Suesouthern

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I’m a newbie
Hi, my Truma dumps and empties the water tank automatically once the temperature drops.
I also have a blue switch next to the boiler I can flip to do this myself.

I was telling a friend and we started to look at theirs but couldn’t see a similar switch. They have a Truma Trumatic C, I have attached some images. They are ready to winterise.

Any ideas please, thanks Sue
 

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The yellow lever in third picture is a manual drain cock ... pull to vertical to drain.

I can't see an auto temperature controlled valve.
 
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Looks like it only has a manual drain......

Lift the yellow lever to the vertical position and it will dump the water in the boiler, returning it to its current position will close the valve again.

Edit.....too slow again sausage fingers 😂😂😂
 
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At £122 it might be cheaper to leave the heater turned on during the winter or do as everyone else and use the manual drain valve - I know what I would do.
 
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Nothing wrong with the manual valve, no need to swap it out.
 
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Ours just dumped the bloody water out at 6 degrees .. got home from work looking forward to a nice hot shower...turned the gas on then took the dog for a walk.

Got back stripped off and jumped in the shower to find a cup full of hot water 🤬due to a air-lock.

Had to clothes peg the drain valve and fill it up ,this time bled the air out first..🤨
 
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Reusables said:
Ours just dumped the bloody water out at 6 degrees .. got home from work looking forward to a nice hot shower...turned the gas on then took the dog for a walk.

Got back stripped off and jumped in the shower to find a cup full of hot water 🤬due to a air-lock.

Had to clothes peg the drain valve and fill it up ,this time bled the air out first..🤨
Click to expand...
The electric ones were supposed to dump at 4 deg but 6 was quite common, the mechanical ones it's 3 deg and they appear to be quite accurate, well they have been on both the vans we have had with them.
 
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Lenny HB said:
The electric ones were supposed to dump at 4 deg but 6 was quite common, the mechanical ones it's 3 deg and they appear to be quite accurate, well they have been on both the vans we have had with them.
Click to expand...
Probably working just fine then..there's no doubt they are a great idea incase you forget to drain it down.just a pain when you need a shower... anyway the plumber has just fixed our house boiler so no more running out to the motorhome for a shower
🤗

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Thanks all we thought that may be a drain leaver but being newbies didn’t want to risk it. I did lol at the 6 degree dump comment 🤣🤣🤣
 
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Hello all
In regards to this subject. We have a trauma boiler in Maurice and likes to dump all our water when cold! We are off the Wareham Dorset this weekend. What is the best way to ensure we do not wake up and finding out the water has been dumped overnight? Should we leave the heating on low all night to ensure the temperature does not drop below 6?
Any top tips would be great. Just do not want to keep filling up the tank.
Thanks John
 
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Easiest is to leave the water heater on the lowest setting, either electric or gas.
Our Truma is unde the bed and it really keeps the bed warm even when there is ice outside.
Yes yes I know someone will say they think thats dangerous but we are still here
Mike & Ann
 
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Reusables said:
Ours just dumped the bloody water out at 6 degrees .. got home from work looking forward to a nice hot shower...turned the gas on then took the dog for a walk.

Got back stripped off and jumped in the shower to find a cup full of hot water 🤬due to a air-lock.

Had to clothes peg the drain valve and fill it up ,this time bled the air out first..🤨
Click to expand...
Yeah. I did that last winter. Put heater on, went for walk, when I got back all the water was on the car park. It was at least 6degrees
 
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Clothes pegs are a good idea. Got caught out last year when knock on door from nice Frenchman saying lots of water under your van and yes it was 6 degrees ,so now a clothes peg sits on the dump valve

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You could try putting a hot water bottle near the dump valve to keep it 'warm' and hopefully prevent it dropping the water unless it gets very cold, or the clothes peg method, but remember to remove the peg when you return home for a while and/or lay the van up, even if you've emptied the water out, as there could still be some residual water left in the tank.
 
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There is an electric heating element available for the auto dump valve I believe. Though I think it is a little pointless as it will not protect the boiler if it has no heat in it! It keeps the valve temperature up so that it does not drop below 6C. Personally as our truma Combi(E) is under the seats and close to the valve just leaving the heater on low (electric or gas) stops the valve opening. Alternatively we use a small thermostat controled convector or blow heater directed towards the truma and valve when parked up at home and we do not want to drain down as we often use the MH in winter. Have attached copy of an instruction sheet I made up for the Truma CP (E) classic combi if it is of any use. It also has my heater start up instructions for cold weather.

instructControl4.jpg
 
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pixer said:
There is an electric heating element available for the auto dump valve I believe. Though I think it is a little pointless as it will not protect the boiler if it has no heat in it! It keeps the valve temperature up so that it does not drop below 6C. Personally as our truma Combi(E) is under the seats and close to the valve just leaving the heater on low (electric or gas) stops the valve opening. Alternatively we use a small thermostat controled convector or blow heater directed towards the truma and valve when parked up at home and we do not want to drain down as we often use the MH in winter. Have attached copy of an instruction sheet I made up for the Truma CP (E) classic combi if it is of any use. It also has my heater start up instructions for cold weather.

View attachment 447527
Click to expand...
Just be careful about leaving water in your MH over winter as it's not just the boiler you have to worry about but the pump, taps etc which if they freeze could split etc.
 
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Minxy Girl said:
Just be careful about leaving water in your MH over winter as it's not just the boiler you have to worry about but the pump, taps etc which if they freeze could split etc.
Click to expand...
Agreed. Used to go skiing frequently when had a 4x4 demountable. Lots of big MHs on site froze solid and had big problems when thawed out! Present MH has internal pipe work, water tank and well insulated but definetly recommend draining down if storing in prolonged periods of very cold weather without serious heating.
 
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My Truma is in the mhome under one of the seats and the dump valve is in the same compartment as the electrical hook up and so considerably colder than where the actual heater is situated. If I leave the heater on low during the night but the external temperature falls below the dump set point and hence dumps the water - will the heater shutdown or go merrily on its way to self destruct!

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weemalkie said:
My Truma is in the mhome under one of the seats and the dump valve is in the same compartment as the electrical hook up and so considerably colder than where the actual heater is situated. If I leave the heater on low during the night but the external temperature falls below the dump set point and hence dumps the water - will the heater shutdown or go merrily on its way to self destruct!
Click to expand...
Combi boilers can be run without any water in the boiler without any problems. You can get an electric heater for the newer mechanical dump valves (ones with blue knob & button) its about 35 quid.
 
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Lenny HB said:
Combi boilers can be run without any water in the boiler without any problems. You can get an electric heater for the newer mechanical dump valves (ones with blue knob & button) its about 35 quid.
Click to expand...
Thanks Lenny HB. I know about the electric heater for the dump valve and its something I'll be doing. I am completely new to this game and haven't actually been out in the Motorhome as yet. Just doing all the tests on my drive. Will be away in the very near future. I should have mentioned that if the Truma E6 is on gas and the water dumps will the boiler shut down? I'm thinking particularly if I was off grid with no EHU.
 
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Lenny HB said:
Combi boilers can be run without any water in the boiler without any problems. You can get an electric heater for the newer mechanical dump valves (ones with blue knob & button) its about 35 quid.
Click to expand...
hi Lenny, if possible could you post up a link to the heater. I tried a google search and came up blank.
Regards.
Mike.
 
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Thanks Lenny.
Mike.

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No stock at the moment.
How does the peg sit on the valve, think that’s going to be my best option.
Not used to this water dumping thing had the Alde heating on the Burstner.
 
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How about a little hot water bottle for it instead? Different shapes depending on your preference! (Before you ask I did NOT go looking for the last one, it just popped up on my screen when I searched for the others!)

1644001524740.png


1644001550296.png
1644001562893.png
 
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