Hi,

I have read this article with great interest. However I wonder if there is any difference, regarding group flushing theory, between a plumbed in HX with rotary pump and a HX with tank/vibe. The reason I ask is that I suppose that the water in the thermosyphon can not start to boil in a plumbed rotary machine (due to the pressurized theromsyphon). I have never experienced steam when I do my flushing, only water that is steaming and when I reach the transition point the water is not steaming any more. For a vibe/tank machine the water in the thermosyphon can start to boil due to no waterline pressure in the thermosyphon and as a result of that the heating and flushing of the group might be different? I understand that this is a very theoretical question but it would quite interesting to find out how it works.

Hi,

Thanks for the response.

I have three comments:

1. I can not find a check valve on my A3. It seems like there is no valve between the pump and the thermosyphon on this machine?
2. I can read the line pressure on the line pressure gauge when the machine is in idle mode. For me, this indicates that the thermosyphon is pressurized in idle mode with the line pressure.
3. The diagram shows a water tank vibe HX machine. I think that there is no check valve on a plumbed in roto HX machine? Is there a similar diagram for a plumbed in roto HX machine?

/Tomas

or two...

thanks for the diagram.

/Tomas