Changing Alde heating fluid - bleed screws
Since it now looks like the annual summer trip to Greece is off for 2020 and I am in lockdown like so many others, I decided to do some overdue and otherwise expensive jobs on my Frankia i840BD vintage 2007. The first job I had ready to go was to change my Alde fluid and to this end I sourced a 12v submersible pump, vast quantities of the purple 5yr fluid and today got started by jacking the van onto stands to defeat my sloping drive way. I found the drain point in my locker adjacent to the entry door. I clamped the hose, removed the brass plug and released the fluid. First of all the liquid was much thicker than I had expected (and way thicker than the new G13 liquid) and smelt a bit musty.
Now I'm guessing the fluid was never changed in my warranty services so the fluid was possibly 13 yrs old so probably picked up some contamination. Anyway, the quantity I drained off seemed way too little, so I decided to loosen all the bleed screws to see if the "radiators" would release more when air was introduced. However, I am not sure I have located all the bleed points. The ones I know about are:
1. Under the lounge seats one on each side
2. The 3rd under the sink in the toilet
3. The 4th in the garage
Does anyone know if there are any hidden bleed points I need to locate in addition to the 4 I have found?
Thanks in advance