User Instructions; Normal Operating Values - Expobar Crema Compact User Manual

8.

User instructions

The following should be considered general lines of operating. It is quite essential to follow the
manufacturer's instructions and regulations as regards safety.
Operating the machine is very simple.
The checks that the operator obtains good coffee are:
- use suitably softened fresh mains water
- boiler water temperature between 85 °C and 105°C
- delivery time 20-30 seconds
- ground coffee dose between 6 or 7 g.
- constant cleaning of the coffee dosing grinder
- checking the wear of the dosing grinder's grindstones

8.1 Normal operating values

Recommended values:
- Pump pressure: 8,5 - 9 bars
Pump pressure are factory adjusted. On Digital-model: Reading/Check the pressure on the manometer.
To Read/Check the pressure on Compact-model use a special equipment:(filterholder with manometer).
- Boiler pressure: 0,8 - 1,2 bars.
Pressure is the red color field on manometer. To regulate the pressure: (turn clockwise to increase
pressure and anticlockwise to decrease the pressure).
- Safety valve opening pressure: ± 1.7 bars
- Expansion valve opening pressure: ± 10.5 bars
Adjust opening pressure with a filterholder (sealed) and a manometer. When indicator shows 10,5 bar
it will start driping from the expansions valve.
- Coffee delivery temperature: 85°C - 92°C
The temperature depends on the type of blend used; it can be checked with a precision thermometer
during delivery.
The pressure switch 's screw can be used for minor adjustments (see boiler pressure).
Allways adjust pressure when you are brewing coffee.
Crema Compact and Digital
13.