Hi All
Recently purchased an Isomac Millenium second hand as I wanted to give E61 a go (replacing BES920).
I received today and noticed over 10-15 minutes that the pressure gauge would heat to 1.5 bar, then drop to 1.2 bar over approx. 90 seconds which would kick in the pressure stat. This would trigger the heating element and then it would heat back up to 1.5 bar over 10 seconds and repeat. The rest of the machine is quite hot, including the group head so shouldn't be losing heat to that. This is all with all valves closed and sitting idle.
My experience with HX's is non-existent having only used a single boiler thermostat and dual boiler PID. Even the single boiler with thermostat seemed to hold heat at idle however, just wanted to see if this was normal amongst HX machines. I would have thought it would hold stable for a lot longer.
Cheers, Tom
Recently purchased an Isomac Millenium second hand as I wanted to give E61 a go (replacing BES920).
I received today and noticed over 10-15 minutes that the pressure gauge would heat to 1.5 bar, then drop to 1.2 bar over approx. 90 seconds which would kick in the pressure stat. This would trigger the heating element and then it would heat back up to 1.5 bar over 10 seconds and repeat. The rest of the machine is quite hot, including the group head so shouldn't be losing heat to that. This is all with all valves closed and sitting idle.
My experience with HX's is non-existent having only used a single boiler thermostat and dual boiler PID. Even the single boiler with thermostat seemed to hold heat at idle however, just wanted to see if this was normal amongst HX machines. I would have thought it would hold stable for a lot longer.
Cheers, Tom

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