I'm sure a Destiny owner will be along soon who can put you on the right track!
The Destiny has a 3 way fridge to use this without an electric hook up ('EHU') you will need a supply of propane gas and a propane regulator.
If you are in any doubt about how long the length of rubber gas pipe has been installed, then renew this to be on the safe side, The propane will also supply the cooker hob installed in the Destiny so it is definitely worth going for if you intend to use that.
Lights and a 12v system will have been fitted to the Destiny (your fridge will run on 12v when being towed - there will be a switch on the front panel which is used to change over the supply between 12v, 240v and gas. Further controls set the temperature.
To start the fridge when on gas, make sure the the cylinder valve on the propane regulator is open and the selector on the fridge control panel is switched over to gas, then depress the gas supply knob whilst pressing the ignition button. You should be able to see a blue pilot light through a peephole somewhere either in the bottom of the fridge or underneath it. When this lights, stop pressing the ignition button but keep the knob depressed for a few seconds until the thermocouple warms up - about 20 seconds should do it.
If you find the model number of the fridge then full instructions should be downloadable from the manufacturer's web-site.
There should be connectors for a battery in the front box (I believe that is where the battery is stored on a Designer, but look around for two thick cables with quick release or other clamps on them. There may also be a mains connector plug either on the side or underneath the Destiny somewhere, usually this is under a small flap or sealed with a weatherproof cap. The plug itself will usually be coloured blue and white.
If the Destiny is wired for mains and I suspect it will be, you will need a mains connector lead to link to the site EHU.
If you get stuck, please send in photos, these can help others offer assistance, alternatively if there is a Dandy meet close by consider joining that for advice or if you know a caravanner the systems are pretty similar so there could be help from that quarter.
There are advice notes and information sheets available on other Dandy sites as well as from the Camping & Caravan Clubs which may help.
Sometimes these information sheets can seem a bit overwhelming but connecting up is easy and I feel sure that anyone on a meet will be more than willing to offer help.
Last edited by KB on Sun 29 Dec 2013, 7:33 pm; edited 1 time in total (Reason for editing : typo on 2nd para - 'with' should read 'this')