We have been promised some images today, which I will post as soon as they arrive
I can also confirm that the warm up time for the boiler to reach full pressure is in the order of three and a half minutes. To say we’re pleased is a massive understatement
This ensures one of the design objectives will be satisfied – to have a machine that heats up fast enough so it is practical to use before work every morning. We want people to use this machine all the time, to make it part of their lives – its been built to last so it would be a crime not to use it every day
Some of you have been asking about the thermosiphon. It will not suffer from an air-lock unless it has been poorly designed, i.e. the highest point in the thermosiphon is above the highest point of the circuit in the group. As you would expect, as soon as the cool side of the thermosiphon reaches the same temperature as the hot side the thermosiphon stops circulating, so the group does not become hotter & hotter
We can also confirm that the each copper boiler will be very carefully polished, with any lumps of brazing ground off, and the an enamel clear coat will be applied and oven baked at 250C. Unlike a lacquer it will not flake or blister or bubbled with the heat of the boiler. The payback is a wonderful copper boiler with a high lustre that doesn’t tarnish. We’re proud of it, and hope you will like it too
To design a machine that doesn’t tip over with the force of a full commercial group has been something of a challenge, but as the images we hope to post here today will show it is one that has been overcome. This has been the most difficult aspect of the project.