Results 1 to 10 of 10
Like Tree3Likes
  • 3 Post By flynnaus

Thread: Used HX machine arrived with particles coming out of the brew/hot water

  1. #1
    Junior Member
    Join Date
    May 2013
    Posts
    14

    Used HX machine arrived with particles coming out of the brew/hot water

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hi,

    I just purchased a used Expobar Office Pulser on eBay and since receiving it I've found small particles that look like salt coming out of the brew head and hot water. I've flushed the boiler with fresh water 7-8 times and it has improved but they still remai

    Is this scale build up? Will a descaler be too harsh and block the internals? I think the unit is 6+ years old but otherwise things look good and seem to function well.

  2. #2
    Senior Member
    Join Date
    Aug 2007
    Location
    Melbourne
    Posts
    239
    Do you know if you have earth leakage protection (RCD etc) on the power point you're using?
    I ask because the small particles you're seeing sound a bit like the silica grains inside most heating elements.
    If it is the case it means the element has a small crack allowing grains out but also water in.
    I had a couple of second hand machines (one was sold as working) trip my RCD when first plugged in.

  3. #3
    Junior Member
    Join Date
    May 2013
    Posts
    14
    I believe it does, I should mention I'm an aussie living in USA. This unit is 115V and the wall plug here has TEST and RESET buttons which appear to work. It hasn't tripped anything so far.

  4. #4
    Senior Member level3ninja's Avatar
    Join Date
    Nov 2013
    Location
    Sydney
    Posts
    1,289
    If you post a photo it should be easy to tell if it's scale or element guts

  5. #5
    Junior Member
    Join Date
    May 2013
    Posts
    14
    IMG_20171119_190547.jpg

    Ok so I've purged it 2 more times to get a photo and it's almost entirely gone now. Pretty difficult to shoot, but you can see what looks like black specks...

  6. #6
    Senior Member JMcCee's Avatar
    Join Date
    Feb 2017
    Location
    Morningtom Peninsula
    Posts
    296
    Someone may have descaled using citric acid instead of liquid descaler. Citric will leave wee bits rather than disolving.

    Keep flushing.

  7. #7
    Senior Member WhatEverBeansNecessary's Avatar
    Join Date
    Apr 2017
    Location
    Adelaide
    Posts
    469
    Is there any way you can empty the tank without having to purge through the group head?

    It might be more efficient to half fill the tank, swirl around and empty to suspend the solid particles in the water and get rid of them that way? Firing up the boiler and purging them through the group head they might settle and you will only get small amounts coming out at a time.

  8. #8
    Senior Member artman's Avatar
    Join Date
    Jun 2006
    Posts
    2,383
    Don't forget to fill / flush the boiler also. If you are purging just the group then the boiler water will remain untouched.

    Turn on machine until boiler gets to pressure, turn off machine, open up hot water tap and drain as much as you can. let cool before powering up (make sure tank is full) and repeat a few times until you are getting clear water. Turning off the machine and letting it cool is a precaution so you dont flood the hot empty boiler with cold water, eliminates potential thermal shock.

    Cheers

  9. #9
    Junior Member
    Join Date
    May 2013
    Posts
    14
    Thanks guys, yeah I should mention the flushing I've been doing is getting the boiler to temp, switching the unit off and then emptying through the hot water tap. It's improving so I think the "keep flushing" advice is most appropriate.

    Cheers

  10. #10
    Senior Member flynnaus's Avatar
    Join Date
    May 2008
    Location
    Sydney
    Posts
    4,011
    As it sounds like you don't know much about the history of your Expobar, it might be worth having it professionally serviced by a reputable technician. This would include checking and replacing seals, investigating scale build up and tweaking your machine for optimum performance.
    Dimal, level3ninja and zeezaw like this.



Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •