Before any hot water is able to be drawn from the machine, the boiler
needs to up to its normal operating pressure
As the pipework that delivers the hot water is located towards the bottom of the boiler
(slide 2), steam pressure is employed to force hot water through the pipework and out through the valve assembly. Water is drawn off the machine by pressing the hot water button on either a stand alone switch, or a key on the keypad.
If the water is controlled via the keypad, then the control electronics will have been programmed to deliver a set time quantity of hot water.
Hot water will flow until you either stop the function or the machine does not have enough steam pressure to force water out.