Pic 3 is your flow controller. See http://www.coffeeparts.com.au/ecm/620405 . If you've already hooked water up to the machine, THAT'S where the braided SS hose from the pump attaches. You should also have 3 spare wires from the control box (active, neutral and earth) which attach to the pump.
calblacksmith Moderator Joined: 25 Nov 2007 Posts: 8,206 Location: Riverside, Ca, U.S.A. Expertise: I live coffee
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Posted Sun Sep 22, 2013, 1:53pm Subject: Re: Where is the pump
Agreed pic 3 is the flow meter. The pump hooks in before the meter. The pump puts pressure to the whole system. The proper valves open and close to send water where it is needed, be it to fill the boiler or to brew coffee or to the hot water tap. In a lot of machines, before the meter is an expansion valve and a check valve to prevent water from backing up through the pump.
When brewing, the 3 way valve opens to let water to the brew group. To fill the boiler, that valve opens, the pump runs the same regardless of the final destination of the water. If there is no restance to flow, the pressure is not high but the addition of resistance will cause the pump to build pressure. The closed valves keep the pressure from where it is not wanted, like the boiler.
That machine should have a rotary pump, a vibe pump may be used I guess but a new rotary pump and motor will be at the high end or more of the mentioned price range of $100 to $200.
Also, as said, there should be a set of wires to supply power to the pump. The machines control circuit will turn on/off the power to the pump.
If the boiler is low at power on, the fill valve will open and the system will turn the pump on, it will run until the boiler water sensor detects the proper level then the system board will turn the pump off and close the valve to the boiler. City water connects to the inlet side of the pump, the pump connects to the check valve then the OPV or expansion valve then to the floe meter.
Can you contact the seller to see if he has the pump?
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jbenny Senior Member Joined: 2 Mar 2013 Posts: 8 Location: Portland Expertise: Just starting
Posted Tue Sep 24, 2013, 7:54pm Subject: Re: Where is the pump
Thank you for the responses. I can see now how the incoming water is directed. As for the wiring, I will have to take it in to have the pump insralled. I have a pump, just am not able to figure out how the wiring goes. Thank you all for your help.
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