Thank you 😊 can you take a look at photo of my gas and electric panel im not to sure how it worksHello Garry
It looks like a 12V isolator switch. These are usually fitted with a caravan mover so the mover system can be properly isolated form the battery when its not being used.
We NEVER remove the key, it can get lost and you cannot use the mover without it.The previous owner's stickers seem to conceal the manufacturers IDs, Ultra STORE is the water, and ultraHEAT for room heating. Ensure that you have properly bled the water taps to ensure the boiler is full of water before operating the water heater on either power mode. As above there should be a plastic clip on cowl over the gas vent on the outside of the van that should be removed before operating on gas.
The red key in the first photo is generic and if you rotate it like a bayonet (allthough only one pin) there will be a point where it can be removed. THis ensures that the motor mover is non-operation while towing.