23
Instructions for the user
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
14
).
• Set desired CH temperature (see
CH function
on page
23
).
• Set desired DHW temperature (see
DHW function
on page
24
).
• If one or more ambient probes or a thermostat are present, set the desired ambient temperature value and the weekly programming.
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 heating water temperature, press +/- CH 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
54
).
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 boiler ignition and the following one, used to prevent boiler frequent turning on and off, ranges between 0 and
10 minutes (default value: 4 minutes), and can be edited with the P11 parameter.
Should water temperature in the system fall below set minimum value, between 20°C and 78°C (default value 40°C for standard range, 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.
Summary of Contents for ITACA KB 24
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