Breville/Sage 870XL Barista Express - Water Flow
128.1 هزار بار بازدید -
5 سال پیش
-
Let's take a look at
Let's take a look at how the water flows through this machine in the various operating modes.
Timeline if you want to skip to a topic:
00:00 Introduction
01:08 Water tank connector
01:16 Water flow meter
02:22 Water pump
02:29 Over-pressure/safety valve
02:40 Excess Water/Steam Flow
04:35 Hot Water/Steam Flow
07:48 Espresso Flow
09:20 Solenoid Failure Explanation
11:05 Upcoming Projects/Videos
a.k.a. Sage Barista Express
After replacing the solenoid valve assembly a few months ago, it looks like the pump and/or safety valve is going. Initially after the valve replacement, machine operated fairly normal, but over time, the brewing pressure started falling. Besides that, it would get into a mode where the pressure would rise and fall cyclically and you could hear the sound of the pump getting louder and softer. Finally it got to the point hardly any pressure registered on the gauge during brewing. Yet, hot water would flow out the group head with no filter installed.
I had a replacement pump on order from ereplacementparts.com, but it stayed on back order, so I cancelled that and searched around and found a pump and valve on Amazon:
ULKA Pump Model EFP5 ~120v 60hz 2/1 minutes, 52W, for Breville Espresso
https://amzn.to/32TNB5E
Safety Valve For Various Breville Espresso Machines
https://amzn.to/3336naU
Ceme solenoid valves: from the new solenoid block assembly: Breville SP0020444
2-port #V799VN15PR44 : https://amzn.to/3RaKDTv
3-port #V397VN25PR44 : https://amzn.to/3CsKMNJ
For a 240V pump, you'll need to get the p/n off your old pump and search for the Ulka p/n on-line. If anyone has that p/n or a source for the pump, post up in the comment section.
With an understanding of the water flow, the solenoid valve failure mechanism now makes sense. The upper port on the 3/2 valve runs to the hot water valve and it's standby/dump port. If that port isn't closed off fully, it provides a low resistance path to the drain for the water as compared to the high pressure/resistance path through the packed coffee in the filter basket. That's why you hear the solenoid buzzing and the pressure gauge read very low.
Google photo album with photos:
https://photos.app.goo.gl/bN1ugnLPYwv...
More to come, pump replacement...
Subscribe for more content like this
Comment, rate, share & click the bell icon
And as always, thanks for watching
#breville #bes870 #bes860 $espresso #barista #breville #sage
Timeline if you want to skip to a topic:
00:00 Introduction
01:08 Water tank connector
01:16 Water flow meter
02:22 Water pump
02:29 Over-pressure/safety valve
02:40 Excess Water/Steam Flow
04:35 Hot Water/Steam Flow
07:48 Espresso Flow
09:20 Solenoid Failure Explanation
11:05 Upcoming Projects/Videos
a.k.a. Sage Barista Express
After replacing the solenoid valve assembly a few months ago, it looks like the pump and/or safety valve is going. Initially after the valve replacement, machine operated fairly normal, but over time, the brewing pressure started falling. Besides that, it would get into a mode where the pressure would rise and fall cyclically and you could hear the sound of the pump getting louder and softer. Finally it got to the point hardly any pressure registered on the gauge during brewing. Yet, hot water would flow out the group head with no filter installed.
I had a replacement pump on order from ereplacementparts.com, but it stayed on back order, so I cancelled that and searched around and found a pump and valve on Amazon:
ULKA Pump Model EFP5 ~120v 60hz 2/1 minutes, 52W, for Breville Espresso
https://amzn.to/32TNB5E
Safety Valve For Various Breville Espresso Machines
https://amzn.to/3336naU
Ceme solenoid valves: from the new solenoid block assembly: Breville SP0020444
2-port #V799VN15PR44 : https://amzn.to/3RaKDTv
3-port #V397VN25PR44 : https://amzn.to/3CsKMNJ
For a 240V pump, you'll need to get the p/n off your old pump and search for the Ulka p/n on-line. If anyone has that p/n or a source for the pump, post up in the comment section.
With an understanding of the water flow, the solenoid valve failure mechanism now makes sense. The upper port on the 3/2 valve runs to the hot water valve and it's standby/dump port. If that port isn't closed off fully, it provides a low resistance path to the drain for the water as compared to the high pressure/resistance path through the packed coffee in the filter basket. That's why you hear the solenoid buzzing and the pressure gauge read very low.
Google photo album with photos:
https://photos.app.goo.gl/bN1ugnLPYwv...
More to come, pump replacement...
Subscribe for more content like this
Comment, rate, share & click the bell icon
And as always, thanks for watching
#breville #bes870 #bes860 $espresso #barista #breville #sage
5 سال پیش
در تاریخ 1398/07/11 منتشر شده
است.
128,189
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