Instructions for the user
21
1.14 Boiler operation
1.14.1 Switching on
DANGER
It is presumed that the boiler has been installed by a qualified installer, it has been commissioned and is ready to operate
correctly.
• Open the gas shut-off cock.
• Turn the master switch installed ahead of the boiler to ON.
• The display turns on and indicates the function currently active (see Interpreting boiler status from display indications on page
13
).
• Select boiler operating mode by pressing
button on the touch-screen: OFF, SUMMER, WINTER, CH ONLY (see Selecting
the operating mode on page
15
).
• Set desired CH temperature (see CH function on page
21
).
• Set the desired temperature value for domestic hot water(KC or KR/KRB models with optional external water heater) (see DHW
function on page
22
).
• If one or more ambient probes or a thermostat are present, set the desired ambient temperature value and the weekly program-
ming.
WARNING
Should the boiler be left inactive for a long time, particularly when boiler is propane-fired, ignition might be difficult.
Before starting the boiler switch on another gas powered device (e.g. kitchen range).
Beware that even by following this procedure, the boiler might still experience some starting difficulties and shut down
once or twice. Press the RESET button to restore boiler operation.
1.14.2 CH function
To set the water temperature for central heating, press the +/- HEATING buttons.
Heating temperature adjustment range depends on the selected operating range.:
• standard range: from 20°C to 78°C (pressing CH +/-);
• reduced range: from 20°C to 45°C (pressing CH +/-).
Operation range selection is to be implemented by a installer or an authorized Service Centre (see par. Selecting the operating range
in heating mode on page
60
).
During temperature setting, the
symbol flashes on the screen and the CH current temperature setting is displayed.
When the CH system requests heat from the boiler, the LCD displays the CH symbol
and the current CH flow water temperature.
The waiting time between one switching on of the boiler and another, in order to avoid the boiler coming on and off when in central
heating mode, is between 0 and 10 minutes (4 by default), which can be changed with parameter P11.
Should water temperature in the system fall below set minimum value, between 20°C and 78°C (default value 30°C for standard ran-
ge, 20°C for reduced range) to be edited with the P27 parameter, the waiting time is reset and the boiler re-ignites.
The burner ON symbol shows while the burner is operating.