If the home is to be left unoccupied during cold periods when there is a threat of freezing, the domestic
hot and cold water circuits must be drained as follows:
Turn off the cold water supply
Open all hot and cold water taps including showers
Under the home, only open the hot and cold water drain valves (not the central heating circuit drain
Refer to the holiday home owner’s handbook for the drain valve positions and further instructions on
BEWARE – there are two drain valves under the home beneath the boiler - do NOT open these as they
drain the central heating circuit, which should have been filled with antifreeze and corrosion inhibitor.
Please note there are no drain valves on the boiler. Leave all taps, showers and drain valves open until
you are next ready to use the boiler.
When installed in a Caravan holiday home the central heating circuit and radiators should be filled with an
approved antifreeze and inhibitor (Either Fernox Alphi 11 or Sentinel X500). The level of antifreeze
should be checked annually by a competent person. If the home is occupied during freezing weather, the
central heating should be run continuously and the optional room thermostat or thermostatic radiator
valves set at a minimum of 15ºC.
If the home is unoccupied for even a short period, the domestic hot and cold water system must be
drained down as explained in bullet point three above. This is the only way to guarantee against frost
Timer control segments
1 segment = 15mins
OFF – Segments on inside of ring
ON – Segments on outside of ring