I recently purchased a new Astra Mega II Compact for use as a backup/event machine. Out of the box running blistering hot, measured as high as 218f via Scace Thermofilter. Dialed Sirai pstat all the way down, which lowered the boiler down to 0.7bar, getting start of shot down to ~203f rising to ~206f by end of shot. Bizarrely a long (like as long as 30 seconds) flush and go results in an even higher start of shot!

This was late afternoon Friday past. Astra was closed for the weekend by the time I called so shot an email. Richard from Astra called back this morning, and they're sending longer tubes from boiler HX to the groups but I'm not too optimistic. They're willing to replace the machine but I agreed to give the longer lines a shot.

Anyone have any experience with these lower end about as basic as you can get Astra HX machines? Eric I was going to PM you but figured open forum just might get lucky. Got me baffled.

The "extra length" tube (hx outlet) is exactly what Greg Scace did about 9 years ago. I will try to locate the story on alt.coffee archives and link it in here later. His Astra Mega has changed hands and I have worked on it on several occasions. The boiler now has a PID applied and is running around 0.70 bar if I remember correctly.

You can always email me at the address below my sig (much preferred over pm's).

edit - the link to Greg Scace's post in alt.coffee - https://groups.google.com/d/msg/alt.cof ... EAjPWcHnoJ