Iberital Expression Pro Manuel D'installation page 85

Once this procedure is completed, press the MENU button to move on to the following option:
The display will show the machine heating control system option.
Press the UP/DOWN buttons to select "Pressure Switch", "ON/OFF" or "PID" and confirm by pressing OK.
- Pressure Switch: boiler temperature controlled via pressure switch.
IMPORTANT
ANY MACHINE MODEL WITH TWO BOILERS MUST NEVER HAVE THE "Pressure Switch"
OPTION SELECTED, AS THE MACHINE WORKS WITH A TEMPERATURE SENSOR IN ORDER TO
CONTROL THE COFFEE BOILER TEMPERATURE.
ANY MACHINE MODEL WITH A SINGLE BOILER MUST NEVER HAVE THE "Pressure Switch"
OPTION SELECTED.
- ON/OFF: coffee boiler temperature controlled via temperature sensor with hysteresis (the oscillation
temperature interval for the boiler) of 0.5ºC, 1ºC or 2ºC.
IMPORTANT
ANY MACHINE MODEL WITH TWO BOILERS MUST NEVER HAVE THE "ON/OFF" OPTION
SELECTED.
ANY MACHINE MODEL WITH A SINGLE BOILER AND WITH PRESSURE SWITCH MUST NEVER
HAVE THE "ON/OFF" OPTION SELECTED.
- PID: coffee boiler temperature controlled via temperature sensor, with variations in an algorithm of three
constants Kp, Ki and Kd. (RECOMMENDED BY THE MANUFACTURER)
IMPORTANT
ANY MACHINE MODEL WITH A SINGLE BOILER MUST NEVER HAVE THE OPTIONS "PID"
SELECTED.
In this position the machine will control the temperature according to its working conditions, adapting itself at all times to
the internal and external contour conditions.
The values for these constants will depend on the power of the element, the size of the boiler and the degree of heat
dispersion in the boiler.
WARNING
In order for the machine to work correctly, the values of the said constants should not be altered.
INSTALLATION AND OPERATION MANUAL
Heating Type
xxxxxxx
xxxxxx: Pressure Switch, ON/OFF, PID
IBERITAL
83