Set Appliance State:

WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

To set boiler to maximum output follow steps below.
1. Turn rotary CH temperature selector for less than 2 s fully clockwise and then back into its control range on the right (see fig.1).
The display shows "SERV" and the boiler water temperature.
2. Adjust heating output (Max output):
Turn rotary CH temperature selector to the control range on the right until the display shows 5 bars (Max output) for the upper heating output (see fig.2).
3. To end, shut down boiler, turn rotary CH temperature selector to its original position.