Use And Maintenance; Commissioning The Boiler; Lighting And Operation; Regular Cleaning - Sime RONDO 3 OF Instrucciones De Instalación Y Mantenimiento

3 USE AND MAINTENANCE
3.1 COMMISSIONING THE BOILER
When commissioning the boiler always
make sure that:
– the system has been filled with water and
adequately vented;
– the flow and return valves are fully open;
– the flue and chimney are free from
obstructions;
– the electrical connections to the mains
and the earthing are correct;
– no flammable liquids or materials are
near the boiler;
– check that the circulating pump is not
locked.
3.2 LIGHTING AND OPERATION
3.2.1 Lighting the boiler (fig. 7)
To light the boiler proceed as follows:
– check that the "Testing Certificate" has
been removed from inside the combus-
tion chamber;
– switch on the main switch (1) and verify
that the green LED (3) turns on to confirm
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the presence of voltage.The burner will
start;
– turn the boiler stat knob (5) to a tem-
perature no lower than 60°C. The set
temperature value can be checked on the
thermometer (4).
– set the temperature of the hot-water
service by pressing the thermostat of the
boiler unit (6). The set temperature value
can be checked on the thermometer (7).
3.2.2 Safety stat (fig. 7)
The manually reset safety stat (2) trips to
switch-off the burners immediately when
the boiler temperature exceeds 100°C. To
restart the boiler, unscrew the black cover
and press the button underneath.
If the problem occurs frequently, call an
authorised technical assistance centre for
the necessary checks to be carried out.
3.2.3 System filling
Periodically check the pressure values of
4 3 1
KEY
1 Main switch
2 Safety stat
3 Green voltage LED
4 Boiler thermometer
5 Boiler stat
the hydrometer (13 fig. 2/a) mounted onto
the system, when the system is cold, should
range between 1 and 1.2 bar. If the pressure
is less than 1 bar, reset the system.
3.2.4 Turnig OFF boiler (fig. 7)
To temporarily turn off the boiler turn off
the electricity supply by pressing the main
switch (1). The following operations must be
carried out if the plant will not be in use for
a lengthy period of time:
– position the main switch of the plant on
off;
– turn the fuel and water taps of the central
heating plant off;
– empty the central heating plant if there is
danger of frost:
3.3 REGULAR CLEANING
Maintenance of the boiler should be car-
ried out annually by an authorised service
engineer. Disconnect the boiler from the
electrical supply before servicing or main-
5
Fig. 7