Breville BES900 Dual Boiler - Owners thread

[Barry_Duncan]

That's correct. After removing the drip tray there is a pool of water underneath.

Several times I have found a little puddle of brewed coffee under the drip tray. Never enough to leak onto the bench.

I didn't know how it got there but following the above discussion I now think I know.

I regularly use a naked portafilter and from time to time coffee spurts onto front panel and runs down through the crack between the panel and the drip tray.

No great problem. Just a waste of coffee.

Barry

[nickoyang]

Too bad that's interstate for me.
Any chance of seeing you guys at an event in Melbourne?

The video clip is very enjoying but as for the taking data from the PCB what in the part is worthy to be proud of? To me, it is just a marketing stuff.

Cheers,

Nick

[nickoyang]

That's correct. After removing the drip tray there is a pool of water underneath. If I don't clean the machine for a while the water drips further below the machine onto the bench top.

I initially thought it was the water being released back to the tray after pulling a shot via the 3-way solenoid(?) but it happens when I splash a lot of water onto the body of the machine which then drips down to front panel through the crack where the tray meets up with the machine's front panel. The water then takes the path of least resistance which is towards the back of the machine (see picture)

To splash the body with water is not a good idea because teh water can spill over many places in the machine such as the plastic boxes enclosing the buttons and possibly over the NTC (negative temperature coefficient) thermistor and the fuse connected to the brew boiler which can cause severe damage or electrical hazzard to the machine and human body.

I can tell you even the steam from the steam ward can evaporated into the machine to cause some screws nearby the steam valve to rust (seen in may machine).

Cheers,

Nick

[rustic]

Ummmmmmm, just in case you misunderstood: the water is splashing from the group head onto the front panel while brewing, backflushing, or performing a portafilter wiggle to clean up coffee grinds from the group head. The majority of the water comes from the portafilter wiggle and causes a puddle of water under the drip tray as described by Barry. If not cleaned up after a brewing session then the water can build up and flow onto the bench.

I can only speculate that over time (years?) this could cause an issue if vapor from the water gets into the machine possibly causing rust.
Not too worried about it though.

[nickoyang]

Ummmmmmm, just in case you misunderstood: the water is splashing from the group head onto the front panel while brewing, backflushing, or performing a portafilter wiggle to clean up coffee grinds from the group head. The majority of the water comes from the portafilter wiggle and causes a puddle of water under the drip tray as described by Barry. If not cleaned up after a brewing session then the water can build up and flow onto the bench.

I can only speculate that over time (years?) this could cause an issue if vapor from the water gets into the machine possibly causing rust.
Not too worried about it though.

Hi,

Sorry that I misunderstood what you said. Now I got it.
I can definietly tell you the O-ring on the end of hose conencted to the brew boiler is getting stiff or hardened in your machine. If you see the water coming from the collar of the grouphead while machine is heating up, the O-ring probably is broken so the hot water spills out from the brew boiler's hole and coming down through the heater of the grouphead.

This is very dangerous to your machine because the 3-way solenoid valve is just nearby the brew boiler because the valve base is integated onto the greaphead heater assedmbly. When the hot water spills over the 3-way solenoid valve, the valve's coil and electrical wires connected to the coil will be short-circuited to burn it out and permanently damage it and to the controller's PCB as well.

You need to stop using the machine and send it for repairs. The repair may be just replacing one or two O-rings.

Cheers,

Nick

[snypa762]

Much easier to use the plastic blind filter insert I got from Coffee Parts.

Barry

One more question in regards to backflushing. I purchased a stainless steel blind filter basket and want to use it for the deep cleaning cycle. However Ive read on the website that the manufacturer of the blind filter does not recommend doing it for more than 10 seconds.

Would it be a problem if I used the Blind FIlter with no holes for the Clean cycle that counts down from 300 seconds ? Or would I damage the machine.

So far Ive been using the silicon disc and the single wall filter ( Im an idiot for throwing away the dual walled filter baskets, Hence the reason for buying a Blind filter basket.)
but most of the water gushes out and doesnt even backflush with the single wall filter. Im a bit obsessed with keeping the machine clean, and now am worried that all the backflushing might have been in vain the last 2 months Ive owned the machine.

TLDR: Can a totally Blind basket be used with tablet for the 300 second Clean Cycle without causing damage.

As always thanks!!

[brokenvase]

Breville BES900 Dual Boiler - Owners thread

That's correct. After removing the drip tray there is a pool of water underneath. If I don't clean the machine for a while the water drips further below the machine onto the bench top.

I initially thought it was the water being released back to the tray after pulling a shot via the 3-way solenoid(?) but it happens when I splash a lot of water onto the body of the machine which then drips down to front panel through the crack where the tray meets up with the machine's front panel. The water then takes the path of least resistance which is towards the back of the machine (see picture)

I think I have the same issue. Have just new drying it with a cloth. If you are successful in the mod. Do post!

[brokenvase]

Breville BES900 Dual Boiler - Owners thread

One more question in regards to backflushing. I purchased a stainless steel blind filter basket and want to use it for the deep cleaning cycle. However Ive read on the website that the manufacturer of the blind filter does not recommend doing it for more than 10 seconds.

Would it be a problem if I used the Blind FIlter with no holes for the Clean cycle that counts down from 300 seconds ? Or would I damage the machine.

So far Ive been using the silicon disc and the single wall filter ( Im an idiot for throwing away the dual walled filter baskets, Hence the reason for buying a Blind filter basket.)
but most of the water gushes out and doesnt even backflush with the single wall filter. Im a bit obsessed with keeping the machine clean, and now am worried that all the backflushing might have been in vain the last 2 months Ive owned the machine.

TLDR: Can a totally Blind basket be used with tablet for the 300 second Clean Cycle without causing damage.

As always thanks!!

IMHO It's better to use the blind filter for the clear water and even chemical backflush but for the clean-me cycle, use the supplied silicon disc.

[Bosco_Lever]

Take a close look at the La San Marco Flexa 85E. It's a dual boiler with dual resin filters, dual pumps, programmable pre-infusion, a 5L+ tank (and can be plumbed in with a simple add on kit), HUGE drip/waste tray, volumetric control panel, optional PID with 5 line info display that allows full control of boiler and brew temps, pre-infusion, shot volumes etc...
It is built like a tank (all steel construction) and sells for $2499
Oh... and for those who care... made in Italy too

A very good option, thank you for posting. I have made this recommendation to a close friend who bought a BES900, but was disappointed with it. They returned it and were given a full refund. I will not go into the specifics as it will be classed as B bashing.
The specs for this machine are great.
As to the made in Italy, I, and my friend see this as a plus, but many here see it as a negative. Each to their own I suppose.

[nickoyang]

I think I have the same issue. Have just new drying it with a cloth. If you are successful in the mod. Do post!

No need to mod anything,just need to replace the O-rings!
I had changed the O-raings on the steamboiler's anti-vacumn valve yesterday due to some limescale built on the piston of the valve. The steaming power looks far better than ever.
By the way, the two O-rings on the valve are in different sizes and also differ than brew boiler used.

Cheers,

Nick

[WiredArabica]

Nick, this isn't an issue with the mechanics of the machine - see photos added to the above posts. It happens when water splashes around between where the drip tray meets the machine itself, or the cutout area where the water tank is visible - ie water gets inside this cavity from the outside. I suppose this could be called a "design flaw", but a fairly benign one.
Only an issue if you're a little messy when cleaning up, like me .

[samhighley]

I'm also having an issue with water underneath the drip tray. It always ends up down there after a back flush with the blind filter, and so I assume it's got something to do with high pressure water being ejected into the drip tray, and splashing out as it does.

[nickoyang]

Nick, this isn't an issue with the mechanics of the machine - see photos added to the above posts. It happens when water splashes around between where the drip tray meets the machine itself, or the cutout area where the water tank is visible - ie water gets inside this cavity from the outside. I suppose this could be called a "design flaw", but a fairly benign one.
Only an issue if you're a little messy when cleaning up, like me .

Hi,

The picture rustic posted to show how the water coming down from the top of the wall of the front panel should never happen. If your case is not as rustic's, I might be wrong.
But as rustic's case, it is definitely abnormal. I believe all of you haven't open your machine to check how the waste water purged out from the machine to the drip tray. There is only one way there, that is a silicon hose from the top of the 3-way solenoid to a 3-way tube whose one outlet connects a hose down to the openness of the bottom of the machine and above the top of drip tray. There is no way to splash water like rustic's case.

Cheers,

Nick

[dr.a.j.pickering]

Breville BES900 Dual Boiler - Owners thread

Nick

You have a lot of knowledge but you seem to be very pessimistic

Above is classical example a splash of water is being discussed and you make spot (incorrect) diagnosis and advise opening a machine (under warranty) to change o rings

That's like me hearing you have chest pain (when hit in the chest with a hammer) and advising you to have bypass surgery without seeing or examining you.

Just a note of caution to those reading your self help manual!

[nickoyang]

Nick

You have a lot of knowledge but you seem to be very pessimistic

Above is classical example a splash of water is being discussed and you make spot (incorrect) diagnosis and advise opening a machine (under warranty) to change o rings

That's like me hearing you have chest pain (when hit in the chest with a hammer) and advising you to have bypass surgery without seeing or examining you.

Just a note of caution to those reading your self help manual!

Hi,

I did recommend rustic sending back his machine for checking the issue. I just described how the waste water goes from the machine to the drip tray. To assess what I described, I detailed the internal piping for reference.

Anyone can decide believeing or not, anyone can share what he had seen inside of the machine. Anyone can decide if he would like to open his machine or not. I am not from Breville. If I was, I definitely violated Breville's policy to against product warrenty. You decide to believe what you want to listen. That is OK to me.

Cheers,

Nick