Alde wet heating system

You haven't missed any secret water tank. The boost just increases the temp of the hot water so that you saving the volume of water required for a shower

I'm still learning with my Alde heating

You don't need to winterise the Alde heating. The liquid in the system is a mix of anti freeze and water as you would get in your car's radiator. It is designed to be non maintenance apart from the occasional top up, if the header tank level is below minimum, and replaced every few years (up to 5) depending on the type of anti freeze that the system has. 

A search of Google and Alde's own web site will give you a lot of information.

 Answers may be here!

http://www.alde.co.uk/faq.php

Thankyou so much for that guys. I thought that was the case but on our first trip with the van a fellow caravanner mentioned that the heating may need to be drained down (however they admitted that they have always had blown air systems) so i panicked when I couldn't find any info on it!

Glad I'm not as mad as I thought

I assume that you have the service history. When the van was built in 2010 it would have had 2 year antifreeze in i., blue in colour from memory. Presumably changed in 2012? Around this time (?) 5 year antifreeze became available and was pink in colour. If this was changed for the pink it would be due for replacement next year. The antifreeze not only stops freezing, but is essential to prevent corrosion. Check service history. I was in a dealer local to me (Flintshire Caravans) today picking up toilet fluid. I noted that they had a notice saying that they would replace the fluid for £150. I would have guessed that it would have been £200 otherwise. 

Check service details as to situation with the fluid and antifreeze. Corroded boilers are expensive to replace.

Hey Melmodz there will be 9 or 10 ltrs of  water in your boiler to drain down you will find the switch under your offside seat probably yellow flip it up and the boiler will empty don't forget to flip it down again when refilling

Hey Melmodz there will be 9 or 10 ltrs of  water in your boiler to drain down you will find the switch under your offside seat probably yellow flip it up and the boiler will empty don't forget to flip it down again when refilling

 

Not the boiler and heating fluid!! That is just the hot water tank

 ....... I was in a dealer local to me (Flintshire Caravans) today picking up toilet fluid. I noted that they had a notice saying that they would replace the fluid for £150. I would have guessed that it would have been £200 otherwise.  ...

Not a bad mark up when you can buy a gallon of 'anti freeze' for a little over £40 click here

I should have read my link first ..... I've linked to a premixed glycol 

Melmodz, don't fotget to fully recharge your water system on your next trip out, so that water is running from all taps on the hot setting, before switching on the heating &/or water heater.

 ....... I was in a dealer local to me (Flintshire Caravans) today picking up toilet fluid. I noted that they had a notice saying that they would replace the fluid for £150. I would have guessed that it would have been £200 otherwise.  ...

Not a bad mark up when you can buy a gallon of 'anti freeze' for a little over £40 click here

I should have read my link first ..... I've linked to a premixed glycol 

To do it properly probably takes an hour. So with dealer rates ..... 

Because of physical problems I would not DIY in my case.