Winter Drain Down Procedure

  • Water System

    • Open all tank drain valves to drain onboard and external tanks, and leave open.

    • Open the safety drain valve (yellow handle) next to water heater, and leave open.

    Drain down valve

    • Fully open all the taps and shower mixer, move mixer position to the middle, and leave all taps in the open

    position.

    • Unscrew the shower head and shower hose, shake out remaining water and allow water to drain. It is advised

    to leave the shower head and hose disconnected.

    • Run pump for a short time, until all water is expelled.

    • Disconnect the inlet pipe to the onboard water pump, mesh filter and outlet pipe, and re-run the pump for a

    short time, to ensure all the water is removed. Leave the system disconnected during storage.

    • Fit the cowl cover to the Truma Ultrastore.

    • Clean waste pipes and tanks using a sterilising fluid.

  • Electrical system

    Electrical

    If vehicle is being stored while connected to 230v Mains Hook-up:

    • Ensure that the leisure battery is connected and the 20A local fuse(s) is connected.

    • The isolator switch on PSU (where fitted) should be in the 'ON' position, however. the control panel should be

    switched 'OFF'.

    shut down button

    • If Alde system is installed, there is a frost protection setting, which can be used.

    • Vehicles can be left in this condition for extended periods, with the charger operating to maintain the battery.

    However, periodic maintenance and inspection is recommended, this should include the battery condition.

    If vehicle is being stored not connected to 230v Mains Hook-up:

    • Charge the leisure battery for 24 hours prior to placing caravan in storage.

    • Ensure the isolation button on PSU (where fitted) is in the 'OFF' position. (As above)

    • Ensure leisure battery is connected and 20A local fuse(s) is in place only if an alarm or tracker device is fitted.

    • The alarm will eventually drain the leisure battery - we recommend regular (monthly) inspection / re-charging

    of leisure battery.

    • Remove the leisure battery and store in a dry place, if an alarm is not fitted. • The battery should not be

    adversely affected by winter temperatures but the level of charge should be maintained to maximise the life span

    of the battery. This can be achieved using an automotive type

    battery charger as and when required.

  • Gas System

    Gas system

    • Ensure the gas supply is isolated at the gas bottle, and ensure that the gas manifold taps are off.

    • Check the age and condition of the high pressure gas hose and regulator, and replace if required.

    The Truma bulkhead regulator has had issues in the past with blocking up. This is due to the heavy ends in the gas solidifying in the regulator chamber and blocking it. This is not helped by the pressure not being released in the system during the winter months, or the summer for that matter. There is 100 PSI pressure in one side of the regulator throughout the winter which can be effected by the low temperatures..

     The bottle should be turned off and disconnected as suggested and the excess pressure ’burnt’ off (its amazing how long that takes with just one hob going) this will reduce the heavy end build up over the winter.

    Just disconnecting the bottle will not release the pressure in the regulator as it has a non-return valve..