darkow Senior Member Joined: 31 Dec 2012 Posts: 113 Location: Wisconsin Expertise: I like coffee
Espresso: NS Oscar Grinder: Vario W Drip: Breville YouBrew
Posted Sun Jun 16, 2013, 7:44am Subject: Adding gauges to Oscar
I think I'm going to have these gauges from Chris Coffee installed on my Oscar. I've read some posts where other people have added boiler and group pressure gauges, but was wondering if anybody here has done it.
calblacksmith Moderator Joined: 25 Nov 2007 Posts: 6,821 Location: Riverside, Ca, U.S.A. Expertise: I live coffee
Espresso: ECM Veneziano A1 Grinder: Many different commercial Vac Pot: 40s era Silex Drip: Milita, Bunn&Curtis... Roaster: Cast iron pan, gas burner
Posted Mon Jun 17, 2013, 5:43am Subject: Re: Adding gauges to Oscar
MOD NOTE: Moved to mods and restorations forum. .....................................................
I suppose you can add them, I don't remember anyone doing it. The issue I see is connecting into the Oscar. The boiler is not really made for a gauge and you will need to splice into the brew water line from the boiler to the group head for brew pressure. There is not a lot of room inside Oscar to add gauges and the fittings that are required, my personal opinion is that a vacuum breaker will be a better value and more useful, I know it is fun to watch the gauges but I really don't pay attention to the gauges on my machine. Once the temp is set and the brew pressure is set, they stay pretty well in the same reading zone.
My temp does go up and down but I know the normal swing of the Pstat and then when you tap off steam, of course, the pressure will drop in the boiler.
I suppose you could add the boiler temp gauge into the steam wand system, before it goes through the valve, that would indicate the pressure in the boiler and the line to the brew group will give you brew pressure
Do what you want, you have my two cents, YMMV!
In real life, my name is Wayne P.
Feed the newbs, starve the trolls and above all enjoy what you drink!
I'd love to have meters on my Oscar too, but I'm guessing I wouldn't use them much once I have things dialed in also. Meters are always good to have though when first tuning in your shots, and the Oscar has plenty of room on the panel - if it were me I'd consider a dual display meter too.
I don't have a vacuum breaker on my Oscar, but find that if I have the steam wand open 1 full turn just to the steam is off point, I don't seem to need one. As the system heats up I'll get a little drip from the steam wand into the tray, and once it's heated up the seal on the steam wand seems to stop the drip. 40 minutes after power up it's full pressure and ready to go with lots of steam, but at 20 minutes I usually release the steam pressure and within 1-2 minutes while getting other prep ready it seems good to brew. This will probably cause more scale buildup and wear on the steam valve, so that's something to consider too.
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