Re: The Undiscovered Country
Ok... quick and simple explanation...
There are two thermostats one low down on the boiler (brew) and one at the top (steam)... both open and cut power to the element when at the correct temp.
When in brew position the boiler heats up until the brew thermostat opens and then it cycles on/off to maintain the brew temp.
When you switch to steam the other thermostat is placed in circuit and the temp increases until that one opens and it then cycles to maintain the steam temp.
When you hit the brew switch the vib pump starts, the three way valve (at the end of the pipe from the boiler ) opens and allows the water to flow out through the group head.... when you turn off the brew switch the pump stops, power to the three way valve is cut, the valve closes on the supply side but opens between the group assembly and the waste pipe to allow the pressure in the group to be relieved.
The steam side of it is very simple.....
Hope that helps
Originally posted by grendel link=1163231746/0#11 date=1163286533
There are two thermostats one low down on the boiler (brew) and one at the top (steam)... both open and cut power to the element when at the correct temp.
When in brew position the boiler heats up until the brew thermostat opens and then it cycles on/off to maintain the brew temp.
When you switch to steam the other thermostat is placed in circuit and the temp increases until that one opens and it then cycles to maintain the steam temp.
When you hit the brew switch the vib pump starts, the three way valve (at the end of the pipe from the boiler ) opens and allows the water to flow out through the group head.... when you turn off the brew switch the pump stops, power to the three way valve is cut, the valve closes on the supply side but opens between the group assembly and the waste pipe to allow the pressure in the group to be relieved.
The steam side of it is very simple.....
Hope that helps



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