danblev wrote:The group gasket dried out quite soon after my timer broke and I left it on continuously.
danblev wrote:On the other hand, turning it off seems to require pulling out a short steam spurt to get it to its working pressure.
HB wrote:The question of letting espresso equipment run comes up frequently; the thread Is it really safe to leave a HX on 24/7? echos Dan's comment that some components such as gaskets deteriorate more quickly. Vendors invariably recommend leaving the equipment on, claiming that it reduces failure rates. The truth is likely closer to some components benefitting from the steady temperatures (less metal expansion, less scale buildup) while others suffer (electronics rarely like constant exposure to heat, same for components made of rubber, plastic, or nylon).
I'm unconvinced there's a noteworthy benefit of 24/7 operation. Until there is indisputable evidence of a net benefit with all considerations weighing in (longevity, convenience, costs, environmental impact), I am unwilling to pay the extra cost / produce the extra pollution of the added electricity. Besides, I have a cautious nature and believe it's good advice to never leave something hot running unattended (iron, stove, space heater, etc.).
Compass Coffee wrote:Not indisputable evidence but based on a couple decades computer field work it's commonly held the highest rate of failures is during power-up. Many IT departments I've worked with pay to have someone there onsite when they have a large scheduled downing of their servers for just this reason.
Dogshot wrote:I have a dual boiler machine (BII), with both boilers insulated. I currently have the machine on a timer to turn on at 6:00am and off at 8:30pm.
I use the machine throughout the day, 7 days a week. Electricity consumption aside, what is better for the machine - to just leave it on 24/7 or turn it off over night? If it has different effects on different parts, which is better from an expensive or difficult servicing issue? For example, does leaving it on 24/7 age the electronics faster? Is it good or bad to 'exercise' the vacuum breaker by turning off regularly? etc.
HB wrote:They are equally likely to fail to reboot because of software errors, missing scripts, passwords not entered, dependent server not finished rebooting, etc. You could argue that the auto-fill controller board is like a computer, but beyond that the comparison of espresso machines and servers is a real stretch.
Compass Coffee wrote:Actually no they aren't, initial stress on components of power up does have higher failure rate than non-power off re-start software errors.
Ken Fox wrote:My opinion is that with a commercial level of machine it will take longer than the cited hour or two to really reach temperature, and the result is worse shot quality especially in the morning if the machine came on an hour or two before use.