Re: PID on a HX machine?
The PID is on the boiler not the grouphead.
The grouphead on this machine has two small elements (PART 33 below) inserted in the brass block instead of running thermosyphoned water like an E61 head. Like my Izzo groups you also get heat transfered from the hot boiler as the group is still bolted to it as well.
While the boiler is at say 120 degrees the actual temp of the group will be below this due to being exposed to cooler air than the 120, getting this balance right is part art part science.
With a thermosyphon loop on the E61 style you are using the temp differential in the boiler (hot water rises) to pass a small lot of water through a loop to add to the heating of the head.

The PID is on the boiler not the grouphead.
The grouphead on this machine has two small elements (PART 33 below) inserted in the brass block instead of running thermosyphoned water like an E61 head. Like my Izzo groups you also get heat transfered from the hot boiler as the group is still bolted to it as well.
While the boiler is at say 120 degrees the actual temp of the group will be below this due to being exposed to cooler air than the 120, getting this balance right is part art part science.
With a thermosyphon loop on the E61 style you are using the temp differential in the boiler (hot water rises) to pass a small lot of water through a loop to add to the heating of the head.


Just like a cooling flush a warming flush in my case is just getting to know the machine to get consistantly good results out of it. In my case it is just pull the lever down and run 100ml or so of water through each of the groups, even without this it still makes great shots but if I do it I get better shots again 8-)
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