The Adventure Leisure Vehicles - Open Weekend!

Saturday 30th September & Sunday 1st October 2023

More Details

Truma Therme Guide

The Truma Therme uses existing warmth from the heater to heat water. A warm air pipe runs directly through the appliance and releases heat to the water. This is especially useful on cooler days in spring and autumn to have hot water at all times – for example, to wash your hands or brush your teeth. When the heater is not in use, an electric heating element ensures that the water is heated quickly and efficiently.


Switch the Truma Therme on with the control unit.

The control light indicates that the appliance is operating. A thermostat regulates the water temperature to 65°C. Adjust the water temperature to your needs with the mixing tap or the pre-mixing valve. The excellent materials used ensure the drinking quality of the water.

  • Energy sources: Electricity
  • Power supply: 230 V ~. 50 Hz
  • Output of electric heating element: 300 W
  • Power consumption (at 230 V): 1.3 A
  • Water capacity: 5 litres
  • Heating time: from approx. 15 °C to approx. 60 °C: approx. 50 min.

How do I prepare the Truma Therme for the travel season?

  • Check the Truma Therme for leaks.
  • If the Therme is leaking, the inside container must be replaced. This can be done by Truma's mobile service or by a Truma service partner.

How do I fill the Truma Therme properly?

Close the drain and aeration valves completely.

With pre-mixers

  • Set the control button of the pre-mixer valve all the way to the red symbol (hot).

With mixer tap(s)

  • Open the hot water tap of the hot/cold water mixer tap or set the mixer tap to “warm”.
  • Leave the fitting(s) open until the Therme has been filled by displacing the air and water is flowing.

How do I empty the Truma Therme properly?

If you are not using the vehicle, you should always drain the Therme in frosty conditions.

To prevent frost damage to the Therme, Truma advise the following:

  1. The caravan should be horizontal while the water is being drained.
  2. First, disconnect the power to the water pump (main switch or transformer).
  3. Drain the water from the tank or remove the water pump from the tank.
  4. Open the taps in the kitchen and bathroom and, if present, set the pre-mixer valves to warm.
  5. Completely open the drain and aeration valves and pull them out.
  6. Check that all the water has drained (5 litres). Truma say this is best done with a 5-litre bucket or a container with a scale. Depending on the size of the caravan, this volume may be greater because of the water in the hoses in the vehicle.
  7. You can also drain remaining water from the appliance by blowing into the open tap – at the warm setting.

Remember Truma do not accept warranty claims for frost damage.

With the hose clips SC (Truma part no. 40711-00) you can clip the water hoses to the warm air ducts to protect them against frost damage. The hose clips are simply clipped beneath the warm air duct clamps.

Does the Truma Therme need to be sterilised and descaled?

The Truma Therme should be regularly sterilised and descaled. Any standard cleaning products stocked by specialist camping retailers can be used for cleaning, sterilisation and maintenance. It is important that products are used according to manufacturer specifications in the correct dosage and with the correct exposure time.

You can also regularly heat the water in the Therme to 60°C to prevent the growth of microorganisms. To do this, switch the appliance on, leave it switched on for at least50 minutes, and do not use any hot water during this time.

You can use standard descaling products from specialist camping retailers, acetic acid or citric acid to descale the Therme.
Add the cleaning or descaling products in the recommended mixing ratio to the appliance via the water intake and allow them to work. Then flush the Truma Therme as part of your water system thoroughly with fresh water.

Information supplied from truma.com

While we have made every attempt to ensure that the information on these pages has been obtained from reliable sources, Adventure Leisure Vehicles Ltd is not responsible for any errors or omissions, or for the results obtained from the use of this information. All information on this page is provided “as is”, with no guarantee of completeness, accuracy, timeliness or of the results obtained from the use of this information, and without warranty of any kind, express or implied, including, but not limited to warranties of performance and fitness for a particular purpose. In no event will Adventure Leisure Vehicles Ltd including employees be liable to you or anyone else for the decision made or action taken in reliance on the information on these pages or for any consequential, special or similar damages.

Contact Us