11
Instructions for the user
1.3 Boiler operation
1.3.1
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
10
).
• Select the boiler operating mode: OFF/SUMMER/WINTER/CH ONLY (see
Selecting the operating mode
on page
11
).
• Set desired CH temperature (see
CH function
on page
11
).
• Set desired DHW temperature (see
DHW function
on page
12
).
• Set the desired room temperature on the ambient thermostat inside the home (if installed).
• If an ambient temperature probe or an external probe is available, set the desired ambient temperature.
WARNING
After a prolonged period with the boiler not in use, and with LPG fired boilers in particular, some starting difficulty may be
encountered.
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.
1.3.2
Selecting the operating mode
To select the boiler operation mode press B Operating mode selection.
Whenever button is pressed, the following modes are enabled in sequence: "SUMMER", "WINTER", "CH ONLY", "OFF".
"SUMMER" operating status
When the "SUMMER" mode is enabled, only the DHW production function is active.
"WINTER" operating status
When the "WINTER" mode is enabled, both DHW and CH functions are active.
"CH ONLY" operating status
When the "CH ONLY" mode is enabled, only the heating water production function is active.
"OFF" operating status
When the "OFF" mode is enabled, no function is active.
1.3.3
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 a qualified Service Centre (see par.
Selecting the operating range in heating
mode
on page
40
).
During temperature setting, the
symbol flashes on the screen and the CH current temperature setting is displayed.
When the central heating system requests heat from the boiler, the LCD displays the
symbol (blinking) and the current heating 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
30 minutes (default value: 4 min.), 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 minorca kr
Page 62: ...62 ...
