Gaggia Classic boiler on old Gaggia Dandy

Equipment doesn't work? Troubleshooting? If you're handy, members can help.
Marco Valerio
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#1: Post by Marco Valerio »

Hi, my name is Marco and I'm from Rome
I have a question to ask you.
I have a dandy gaggia from the 90s with a solenoid and overpressure valve inserted in the casing of a coffee from the 90s.
do any of you know it? I would like to mount the Gaggiuino but I don't know how. could i possibly put the boiler from the classic on the dandy?
thanks everyone for the replies



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pizzaman383
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#2: Post by pizzaman383 »

From what I see in the pictures the group and fittings look very similar to that of the Gaggia classic. The boiler top mounting looks similar, too.
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vas
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#3: Post by vas »

I would like to mount the Gaggiuino but I don't know how. could i possibly put the boiler from the classic on the dandy?
Is the boiler broken? If not then you can use it as is. You would need to get a new E5 series pump, other than that you have everything needed for the mod.

SJM
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#4: Post by SJM »

This is a question, not an answer.

The Dandy I had years ago came to me (yes, used) without an OPV. The necessary inlet was available, but I had to add the OPV. Did yours come with the adjustable OPV already installed or was that your doing?


Marco Valerio (original poster)
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Joined: 2 months ago

#5: Post by Marco Valerio (original poster) »

vas wrote:Is the boiler broken? If not then you can use it as is. You would need to get a new E5 series pump, other than that you have everything needed for the mod.
No the boiler is in good working condition. The reason i asked about the swap is that the wiring is slightly different and i don't know if i'm able to make any change. Adding the solenoid pump is ok even if the boiler already has the solenoid valve?
SJM wrote:This is a question, not an answer.

The Dandy I had years ago came to me (yes, used) without an OPV. The necessary inlet was available, but I had to add the OPV. Did yours come with the adjustable OPV already installed or was that your doing?
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Finally i found someone that knew the machine and owned it. well it came without an opv valve i added it.
can i ask you some question? The front light will switch off only when there is no more water in the tank? There is no heat light right?

SJM
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#6: Post by SJM »

Ooof....It's been so long since I actually had the Dandy. I do have some pictures, and one of them may help with your question about the water, but I'm afraid I can't experiment and tell you much about lights on or off.

The attached picture is labelled "Dandy has a pressure sensor in the reservoir", so perhaps the on off lights are triggered by it?

SJM
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#7: Post by SJM »

And, if that's the case, it may be possible to trace a wire from that to the power. I will look at it later, but maybe you want to start in on it. This picture is extra confusing because I took it after I added the PID so there are even more wires, but it might help.


Marco Valerio (original poster)
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Joined: 2 months ago

#8: Post by Marco Valerio (original poster) replying to SJM »

thank you very much for the help! seem we are the only two in the world web to have this machine hahaha
about the water level sensor the only thing I figured out is that blowing air in it will switch off the third Botton (the brew one) but never worked when tube attached and submerged.
this is the actual inside and outside of mine.
in the pic you can see no OPV valve installed on the boiler (I removed it) that's because I switched the pump with one from a baby gaggia as someone told me in previous post that already as the OPV on top.
I see also in your picture that you screw a nut in the self priming valve on the steamer. can I ask you why? do you suggest me to exclude it?
thanks in advance





I'm thinking of modding it with gaggiuino but I have small electric knowledge

vas
Posts: 70
Joined: 2 years ago

#9: Post by vas »

No the boiler is in good working condition. The reason i asked about the swap is that the wiring is slightly different and i don't know if i'm able to make any change.
You can reuse the boiler no issues. Adjusting the wiring is pretty simple, join the Discord and you'll get helped.
Adding the solenoid pump is ok even if the boiler already has the solenoid valve?
Solenoid pump is what you have right now, you just have an old Invensys one. For the flow profiling and other options to work properly you need to have a E5 series pump.

SJM
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Joined: 17 years ago

#10: Post by SJM »

Yeah, the Dandy didn't seem to have much of a following.

It's too bad you removed the OPV on the boiler inlet. It is adjustable, which the one you have on the pump is not. Unfortunately they are both 'over pressure valves', so they get confabulated, but the one you have now is a safety valve and not for adjusting the pressure.

As for the valve that indicates whether the light goes on or not, it is a pressure valve. If I remember correctly it sits suspended in the roof of the water reservoir, not in the water. Submersing it in water doesn't do anything. Since you have changed the cabinet that houses your Dandy innards, you are missing mounting for that pressure switch/valve. (The Dandy is the only Gaggia I ever encountered that had that mechanism.)

The Gagguino didn't even exist back when I had my Dandy (or any of my other Gaggias), and I really have no idea what it is or what it does, so I'm no help when it comes to your primary concern of adding it to your hybrid Dandy/Coffee/Baby.

Oh right, about the steam valve. Some Gaggias had self priming valves. They were susceptible to failure and when they failed they allowed warm/hot water to return to the reservoir. I forget what happened then, but I'm guessing the pump didn't appreciate hot water coming thrugh? Anyway, since priming is a simple operation, it was easy to avoid the problem by plugging up the hole with a screw plug and/or replacing the steam valve with one which did not have the SPV at all.