Truma Frost Control Element (2 Viewers)

[Guyadria]

On my Adria there is a mains control and the CP control next to it, If I turn off the mains control off I receive a message from my Inet box (Truma wireless accessory) that power to the boiler has been cut off, even though there is a message on the CP Panel. So it may be true that the panel is on but the boiler is off. I guess it depends on the van configuration. Guy

 

[Madmag]

Guyadria Will have a look at that as ours is an Adria Twin. I also now have the Inet box fitted.

 

[Lenny HB]

On my Adria there is a mains control and the CP control next to it, If I turn off the mains control off I receive a message from my Inet box (Truma wireless accessory) that power to the boiler has been cut off, even though there is a message on the CP Panel. So it may be true that the panel is on but the boiler is off. I guess it depends on the van configuration. Guy

Different manufacturers do wire the boiler differently, Hymer wire the boiler to a permanent live bypassing the EBL distribution unit.

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[Sandyt]

Just a point they only work while the heater is on so unless your frost valve is in a cold spot nowhere near the boiler there is not much point in fitting one.

OK

But the CP-Plus controller is perminantly on so if you had a cold snap it wouldn't dump.

I checked the pins on the PCB with a multimeter. The power to the valve heater comes on whenever the control panel is active. Neither gas nor mains electricity is required. The intended purpose would be to permit filling of fresh water as one arrives at a campsite, otherwise the dump valve will remain open. So yes, if you filled up at home, and left the control panel on, then went to a supermarket in sub zero temperatures, then yes, you have bypassed the safety of the system, and you have permitted the risk of frost damage.

 

[Littlewheels]

I checked the pins on the PCB with a multimeter. The power to the valve heater comes on whenever the control panel is active. Neither gas nor mains electricity is required. The intended purpose would be to permit filling of fresh water as one arrives at a campsite, otherwise the dump valve will remain open. So yes, if you filled up at home, and left the control panel on, then went to a supermarket in sub zero temperatures, then yes, you have bypassed the safety of the system, and you have permitted the risk of frost damage.

Surely your take on it defeats the object, if it’s live it will not dump.

 

[Lenny HB]

Surely your take on it defeats the object, if it’s live it will not dump.

That's my thoughts seems a waste of time.

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[Sandyt]

Surely your take on it defeats the object, if it’s live it will not dump.

Correct, but an element of common sense needs to be applied. The heater gives the operator greater control of the dump valve. The expectation is that when the system is filled with fresh water, the gas or mains heating system is then going to be active (or shortly afterwards).

 

[Littlewheels]

Correct, but an element of common sense needs to be applied. The heater gives the operator greater control of the dump valve. The expectation is that when the system is filled with fresh water, the gas or mains heating system is then going to be active (or shortly afterwards).

I understand operator input but the system does not have a program of this expectation.
My interest in this is that l am using a PVC for a turnaround trip to Gibraltar in a week or so and anticipate low temperatures on the journey, l am used to Alde,therefore,dumping is a fear fracture l have never experienced.

 

[Sandyt]

I understand operator input but the system does not have a program of this expectation.
My interest in this is that l am using a PVC for a turnaround trip to Gibraltar in a week or so and anticipate low temperatures on the journey, l am used to Alde,therefore,dumping is a fear fracture l have never experienced.

Fully agree with your comments re Alde. Our present van has Alde, so for our purpose a dump valve heater would be superfluous. Our last van had a Truma Combi. We live in North of Scotland, and use the van throughout the winter, so we both needed, and used the valve heater. I understand that use of this will bypass the dump valve's intended use, however I am in control of that. Before I fitted the heater, I would put water in the tank (which of course drained out slowly) drive to the pitch, plug into EHU and use my wife's hairdryer to heat the dump valve until it remained closed itself. With Alde, we arrive on site fully heated after the journey....!

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[jezport]

The truma electric heating element is powered when the boiler is on only otherwise as others have said "it would render the dump valve useless"
I know it works this way from using one, not from hearsay!

 

[Lenny HB]

The truma electric heating element is powered when the boiler is on only otherwise as others have said "it would render the dump valve useless"
I know it works this way from using one, not from hearsay!

Not according to post #34.

 

[Guyadria]

This was from another forum some years ago. On the basis of this I have ordered one.
QUOTE

It continued to trouble me though that the possibility remained that it could do so was always there lurking in the background, so we have since ordered and fitted (£35 incl P&P) the dump-valve pre-heater for a bit of reassurance. It was a doddle to fit just plugging into a hole in the valve body and connecting to the Combi with a dedicated plug that connected to a waiting socket on the boiler. The pre-heater maintains the dump valve at 10C only when the combi is powered up (not necessarily switched on/running). Once the boiler has fired up and warmed its 10litres of water it then shuts down and 'sleeps' only running if a top-up is required ... I suppose that overnight in seriously freezing conditions the pre-heater would then make sure that even if the compartment containing the dump valve goes stone cold, the valve itself stays above the threshold temperature so the warmed water then remains in the tank and does not end up on the ground. I think that perhaps this extra heater will only really come into its own in the most severe conditions and is perhaps aimed at rugged Continental types heading off to the Alps in winter.

UNQUOTE

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[jezport]

Not according to post #34.

It depends what the poster means panel active.
If its manual dials the truma heater/boiler is only on if the blow air or the water heating is turned on, then the element is powered.
If its the CP+ the panel is always active and the element is only powered if the heating or water are selected to be on

 

[Lenny HB]

A bit confusing and Truma give very little information on it.

 

[slowcoach65]

As far as I understand, when you turn on the Truma control panel it supplies 12v to the circuit, this would keep the element active, ( the heater and water can be off.)

The following from Truma shows the element operates to 7 deg. The text indicates once the temp drops below 3 deg it dumps, unless you have the frost control fitted and active

So you could park at a supermarket and if the temperature drops to less than three deg you could loose your water, but if the frost control element is fitted and the Truma control panel is simply turned on ,and your 12 v electrics on too, then you have the element active.

From the manual......
At temperatures of less than
approx. 3 °C the FrostControl
opens automatically / without heater op-
eration the FrostControl can-
not be closed again until the
temperature reaches approx.
7 °C / use heating element for
FrostControl

Any chance you could scan the manual, I can't find one anywhere. Many thanks.

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[Littlewheels]

Truma Combi heater • Operating instructions and help!

Technical specifications: operating instructions and info on gas consumption of the Truma Combi heater. PLUS: What to do when you have problems with Combi 6 and Combi 4, etc.?

www.truma.com

 

[Guyadria]

Well I shall soon find out as heater as arrived. Package says 0.4A consumption WITH Truma Combi switched on.

 

[Guyadria]

Okay 30 minute job and heater fitted. As Jezport says, it does not power on with the boiler simply connected. The boiler needs to be "running".

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[slowcoach65]

Thank you all for the links and pics! I will try to fit mine soon.

 

[hotpot75]

Thank you all for the links and pics! I will try to fit mine soon.

I take it with the control panel switched on... Does this thermostat stop water being dropped from the boiler or the contents of your tank.

 

[hotpot75]

This is the small heater element which plugs into the frost control valve at one end & plugs into my Combi 6E at the other for it's power.
Does anyone know where I can buy one. I believe the Truma part number is: 70070-01.
Thanks George

Can you please advise does this item stop just thhe water in the boiler from being dumped.. Or doee it stop the whole contents of your clean water tank. Thanks in advance.

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[Lenny HB]

Can you please advise does this item stop just thhe water in the boiler from being dumped.. Or doee it stop the whole contents of your clean water tank. Thanks in advance.

Depends on where your tank is mounted. If above the valve it will dump the tank as well, if the valve is above the tank it will only dump the boiler.

 

[TONCAZ]

Any chance on letting on where you sourced it from? I still want one. I believe the Truma boiler has a specific connection point for the plug under the connection cover, and obviously the heater element slots into the frost control valve. I imagine the bracket is to keep it in an engaged. Guy

If you still need one, just got one from here £ £55 ish delivered, they had three instock (70070-01)

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