Truma Electric Water Heater Guide

The Truma electric water heater heats the water in your caravan or motor home quickly and keeps it hot for a long time. This allows you to wash your hands thoroughly, wash dishes and even take a long shower at any time: the high quality stainless steel container with extra-large capacity makes this possible. The Truma electric boiler consumes little electricity and operates almost silently.

The boiler is insulated with a special expanded polypropylene (EPP) foam. This lightweight material has optimum thermal insulation properties. The water temperature drops by just 1°C per hour and reheating takes next to no time, despite the size of the water tank. The stainless steel container and all other materials that come into contact with water are safe for use with drinking water.

Switch the Truma boiler on easily with the control unit. The control light indicates that the device is operating.

  • Energy sources: Electricity
  • Power supply: 230 V ~. 50 Hz
  • Output of electric heating element: 850 W
  • Power consumption (at 230 V): 3.7 A
  • Water capacity: 14 litres
  • Heating time: from approx. 15 °C to approx. 70 °C: approx. 70 min.

How do I fill the Truma electric boiler?

  • Check whether the drain valve in the cold water supply is closed: lever horizontal, position (a). 
  • Open the hot water tap in the bathroom or kitchen, set pre-mixers or mixer taps to “warm”. 
  • Switch on the power to the water pump (main switch or pump switch).
  • Leave the fittings open until the Truma electric boiler has been filled by displacing the air and water is flowing.
  • In frosty conditions, filling may be prevented by remaining frozen water. The boiler can be thawed by switching it on briefly (max. 2 minutes). Frozen pipes can be thawed by heating the interior.

a = lever position “closed”
b = lever position "drain"

Remember that the drain valve must be activated regularly to prevent limescale and ensure that it is not blocked.

Why does the water in my Truma electric boiler drain and I cannot fill the boiler?

The Truma electric boiler cannot be filled if the drain valve is open. Check the drain valve and close it if it is open.

How do I empty the Truma electric boiler properly?

If the caravan is not being used during the frost period, the Truma electric boiler must be drained.

To prevent frost damage:

  • Disconnect the power to the water pump (main switch or pump switch).
  • Open hot water taps in the bathroom and kitchen.
  • Open drain valve: lever vertical, position.
  • The Truma electric boiler will now be drained directly to the outside via the drain valve. 
  • Check whether all the water is drained (14 litres).

Remember Truma do not accept warranty claims for frost damage.

Does the Truma Boiler electric need to be sterilised and descaled?

The Truma Boiler electric 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 Boiler electric to 70°C to prevent the growth of microorganisms. To do this, switch the appliance on, leave it switched on for at least 70 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 boiler.
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 Boiler electric as part of your water system thoroughly with fresh water.

The Truma electric boiler takes a very long time to heat – why?

The Truma electric boiler can take a long time to heat if the water container is calcified. In this case, decalcify the water container with commercially available products, such as citric acid or vinegar essence. Products containing chlorine are not suitable.

Why does the water in my Truma electric boiler not get hot?

There can be several reasons why the water in your Truma electric boiler does not get hot:

No power.Reconnect the power
Operation without water; overtemperature protection switches the heating element off.Switch the Truma electric boiler off, wait ten minutes, fill it with water and switch the Truma electric boiler on again.

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