Mk1 Senior Member Joined: 24 Feb 2012 Posts: 5 Location: Nottingham Expertise: Just starting
Posted Fri Mar 16, 2012, 8:03pm Subject: Help with wiring pump.
Hi, I'm new here but after searching around I thought this might be the place to ask. I picked up an 1993 San Remo single group machine a month ago and have been restoring it. It's a single boiler Hx E-61 with all stainless boiler and tubing, 240v, pretty robust construction altogether. I've had good luck with seals and such from Stefano, and am pretty far along. My problem is when it was removed from service the hacks just chopped the wires supplying power. I've made my own version of the large over $100.00 rotary switch with a 3-pos maintained selector switch and a 250V 30A relay to the pressurestat. That was easy but the harness supplying the pump is missing. I've looked at schematics for other similar machines but I'm not quite sure how the pump is controlled. The pump appears to be 220v and I'm guessing 1 hot goes directly to the pump and the other is a continuation of the hot to the 2 solenoids (group and water fill). Am I barking up the wrong tree? Sorry to be so long-winded and I sure would appreciate any input.
Mk1 Senior Member Joined: 24 Feb 2012 Posts: 5 Location: Nottingham Expertise: Just starting
Posted Sat Mar 17, 2012, 12:19pm Subject: Re: Help with wiring pump
Well, I hooked the line coming off the group solenoid to one line from the pump, and then the other pump hot to 120V. It works (good pump pressure) but it runs constantly. I'm thinking something in the solenoid is not releasing although the solenoid does stop the flow of water out the group head.
calblacksmith Moderator Joined: 25 Nov 2007 Posts: 5,683 Location: Riverside, Ca, U.S.A. Expertise: I live coffee
Espresso: ECM Veneziano A1 Grinder: Many different commercial Vac Pot: 40s era Silex Drip: Milita, Bunn&Curtis... Roaster: Cast iron pan, gas burner
Posted Mon Mar 19, 2012, 6:04am Subject: Re: Help with wiring pump
I would have expected that the demo people would have just cut the wires but they would still be attached at either end ... on the espresso machine and on the motor.
The motor should be connected so that any time the brew circuit is activated, the pump comes on, it should also connect in so that it feeds the boiler when its level drops. In SPECIFIC I do not have any info but that is how it should work. It sounds like you are getting a handle on it though.
In real life, my name is Wayne P.
Feed the newbs, starve the trolls and above all enjoy what you drink!
Mk1 Senior Member Joined: 24 Feb 2012 Posts: 5 Location: Nottingham Expertise: Just starting
Posted Mon Mar 19, 2012, 8:50pm Subject: Re: Help with wiring pump
Cal. I'm using what I think is the switched hot wire to the solenoids and another 120 line to the pump. I have a switch on the one line otherwise the pump runs constantly. I have to figure out if something is shorted or I missing something.
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