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ECM Technika/Mechanika IV Profi question.
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Yes i think so too long ago but iam happy where it is now 1.2-1.3 on idle and when steaming it doesn't go below 1.0 bar. Maybe you have a higher spec pressure stat.
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Was your machine running at 1.2 bar when new? Mine was clicking off at 1.5 which I was told was normal, but I have subsequently come to realise was probably out of spec. I have no idea how the gauge became broken because they look to be fairly robust, but it doesn’t really matter as long as I know what to set the pressurestat to (which seems to be working fine).
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Hi Maurice, Thank you for the reply.
I have a Pesado TPD which is similar to a Scace device, but most likely not as accurate and you can’t log the temperature. My issue is with the boiler pressure being high and this can’t be measured at the group, hence why I bought a marginally accurate gauge that would connect to the existing capillary pipe running from the boiler.
With any HX machine there is a trade off between the temperature, steam power and recovery time. From what I have been able to find most HX boilers are idling at about 1.2 bar which on my machine might create less of a need for a cooling flush, but will definitely slow the recovery time and lower the steam power.
I supported a local place when I bought the machine and when I had questions their support at the time was woeful. They were a site sponsor, but have since been banned. I also tried to get in touch with someone who tunes and mods espresso machines, but they never responded. Being a technician in an unrelated industry I prefer to do my own work anyway and espresso machines are relatively simple devices.
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My Mechanika non PID did the same thing started rising 1.5 and above so i replaced the pressure stat. XP110 part number C199900294 0.5-1.5 bar and it back to normal at idle around 1.2.
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The most accurate way is to measure the pressure at your group head. The gauges on most machines are an indicator only and are not that accurate. I suspect if your machine was really getting to 1.75 bar that the pressure relief valve would lift, although I don't know what pressure they are set to.
Get a scace device or better still take it in for a pressure check at your nearest service shop.
You should not have to perform a cooling flush on correctly set up machine.
Maurice
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ECM Technika/Mechanika IV Profi question.
I was wondering if any Technika/Mechanika IV Profi circa 2017 (non-PID) owners could share their boiler pressure readings?
For some background my gauge has always hovered in the range of 1.4-1.6 bar, but recently this has crept up to about 1.75bar due to the gauge not returning to zero.
I attempted to order a new gauge from a site sponsor and they sent me one with a scratched face and overall a very second hand looking part. On top of this their communication was a little lacklustre, so it has since been returned and refund received.
Knowing that WIKA gauges are of a reasonable quality I ordered one direct from them to test the boiler pressure and discovered that the boiler is idling at 1.3-1.5 bar which by all accounts is a bit high. The group head idles at 100ish degrees and it requires a decent cooling flush to get down to brewing temp.
I also pulled apart my old gauge and have bent one of the links to return the needle to the zero position. It still reads higher than the WIKA, but I can live with that.
My next step is to play with the boiler pressure, but before I do it would be helpful to know what other owners have their machines idling at.

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