Gaggia D90 Evolution Operating Instructions Manual

Also see for D90 Evolution: Specifications Use and maintenance

36ENGLISH7.5 SPECIAL FUNCTIONSIt is possible to engage or deactivate certainspecial functions such as PRE- INFUSION,MIXED TEA and WASHING ALARM whichwe shall describe below:PRE-INFUSIONOur software permits measure configurationso that the relative delivery of the COFFEEmeasures through volumetric control ispreceded by pre-infusion. Delivery of thecoffee measure after time 1 (ON) issuspended for a time 2 (OFF) and is thenresumed for the completion of selection.On pressing one of the volumetric controlmeasure keys, the normal delivery cycle ispreceded by a short timed water jet in orderto dampen the coffee pellets before actualdelivery stage.This function ensures the optimum use ofthe coffee pellets.MIXED TEA (HOT WATER)On the engagement of this function thewater delivered is mixed with cold water onentry in the boiler thereby ensuring constantdelivery at a temperature of about 96°C.If this function is not engaged water isdelivered at a temperature of about 100°Cand is highly vaporized.ENGAGEMENT/DEACTIVATIONStart the machine by pressing the mainswitch keeping key T5 of unit 1 pressed andwait for the led relative to key T5 to beginflashing.Press keys T1-T2 in order to engage ordeactivate the PRE-INFUSION, MIXED TEAfunctions.To escape from this condition and return tonormal functions press key T5 again.T1 KEY LED ON : PRE INFUSION : ONT2 KEY LED ON : MIXED TEA: ON7.6 TEA DELIVERYOn pressing key T6 the correspondingsolenoid valve is engaged thereby beginninghot water delivery.On START a timer is activated whichinterrupts the water delivery on reaching thetime set during the programming stage.The simultaneous delivery of tea or coffeeis possible.It is possible to interrupt delivery function inprogress before the programmed time isreached by pressing key T6 again used forproduct delivery.T6T5