TheProfessor Senior Member Joined: 2 May 2012 Posts: 20 Location: Fredericton, NB, Canada Expertise: I live coffee
Espresso: La Musica Vac Pot: Yama Drip: Hario V60 Roaster: Popcorn Pumper
Posted Fri Jan 25, 2013, 12:06pm Subject: Re: Domobar Junior HX - Strange Sounds and Hissing
If the boiler is overfilling, you'll want to take the boiler probe out and clean it. It will be located on top of the boiler, it will be a hexagonal fitting screwed into the boiler with an electrical connection and one wire plugged on to it. Don't just yank the probe out of the fitting. Take the wire off trying to make sure you don't move the probe mounted through the fitting. Then unscrew the fitting out of the boiler to see the bottom "Inside" end of it. It will probably be covered with calcium if the boiler was overfilling. You can simply clean it off with a wire brush, sandpaper or steel-wool. Screw it back into place with a bit of teflon tape or one of the loctite thread sealants, reattach the wire and turn the machine back on. Once it is hot enough to pressurize the boiler, open your hot-water valve to lower the water level in the boiler. When the pump comes on, the water is below the probe. Close the water-valve and when the pump shuts off the boiler is filled to the bottom of the probe, the correct level. Now... If the boiler has been over filling, I'm suspecting that your leak is actually comong out through the safety relief. The bigger thing that looks like your anti-vacuum valve.
To locate a tiny, hissing leak on a boiler. Put a butter knife in your freezer for a half hour. Take the top off of the machine and turn your machine on. Once the machine is hot put the cold knife tip near the boiler connections and near the valves on top. The steam will condense visably on the cold knife, you will see it. If it is the safety valve it might be best to replace it or have a technician replace it. We're not supposed to suggest you try to clean and set it yourself. That said, you can set your pressostat yourself and so long as the safety isn't leaking at all at 1.2 Bar, and your boiler pressure never exceeds 1.2 Bar, then Bob's your aunt's fiance.
I was working on doing this and, to my surprise and dismay, one of the copper pipes snapped, really much too easily. Now I am stuck to find a part for this in Fredericton, NB, Canada. If you can see in the photos, the placement is quite difficult. Any suggestions on how to make this happen from here? Also, where do people locate parts in Canada (this is my first issue of the kind)? Thanks for all the info.
Symbols: = New Posts since your last visit = No New Posts since last visit = Newest post
Forum Rules: No profanity, illegal acts or personal attacks will be tolerated in these discussion boards. No commercial posting of any nature will be tolerated; only private sales by private individuals, in the "Buy and Sell" forum. No SEO style postings will be tolerated. SEO related posts will result in immediate ban from CoffeeGeek. No cross posting allowed - do not post your topic to more than one forum, nor repost a topic to the same forum. Who Can Read The Forum? Anyone can read posts in these discussion boards. Who Can Post New Topics? Any registered CoffeeGeek member can post new topics. Who Can Post Replies? Any registered CoffeeGeek member can post replies. Can Photos be posted? Anyone can post photos in their new topics or replies. Who can change or delete posts? Any CoffeeGeek member can edit their own posts. Only moderators can delete posts. Probationary Period: If you are a new signup for CoffeeGeek, you cannot promote, endorse, criticise or otherwise post an unsolicited endorsement for any company, product or service in your first five postings.