Roca NEOBIT S 24/24 Instrucciones De Funcionamiento página 8

4. Room temperature adjustment
The system must be equipped with a room thermostat (see the relevant
regulations) to control the temperature in the rooms.
In case there is no room thermostat, during initial lighting, it will be possible
to control the room temperature by turning control (12).
To increase temperature values turn the control clockwise and
anticlockwise to decrease it. Electronic modulation of the flame will enable
the boiler to reach the set temperature by adapting the gas supply to the
burner to the actual heat exchange demand.
5. DHW temperature adjustment
The gas valve is provided with an electronic flame-modulating function,
which operates depending on the DHW temperature adjusting control (13)
settings and on the quantity of water drawn from the taps.
This electronic device allows to keep the water coming out of the boiler at
a constant temperature also when small quantities of water are drawn.
To increase temperature values turn the control clockwise and
anticlockwise to decrease it.
6. Filling the boiler
Important: Regularly check that the pressure displayed by the pressure
gauge (14) is 0.7 to 1.5 bar, with boiler not operating. In case of overpressure,
open the boiler drain valve (Figure 3b). In case the pressure is lower open
the boiler filling tap (Figure 3a).
We recommend you open the tap very slowly in order to let off the air.
During this operation, the Summer/Winter selector (ref. 1, figure 4) must
be in the OFF position (0)
In case pressure drops occur frequently have the boiler checked by a
Qualified Service Engineer.
fig.3a
8
14
Filling tap
fig.3b
The boiler is supplied with a hydraulic differential pressure sensor, which
blocks the boiler in case water is lacking or the pump is blocked.
7. Turning off the boiler
The electric supply to the boiler must be removed in order to switch it off.
When the selector (1) is in position (0) the boiler stays off, but the voltage
remains present in the electric circuits of the apparatus.
8. Prolonged standstill of the system.
Frost protection (central heating system)
We recommend you avoid draining the whole system as water
replacements engender purposeless and harmful limestone deposits inside
the boiler and on the heating elements.
In case the boiler is not operated during wintertime and is therefore exposed
to danger of frost we suggest you add some specific-purpose anti-freeze
to the water contained in the system (e.g.: propylene glycole coupled with
corrosion and scaling inhibitors).
The electronic management of boilers includes a 'frost protection' function
in the central heating system which operates the burner to reach a heating
flow temperature of 30° C when the system heating flow temperature
drops below 5°C.
The frost protection function is enabled if:
· Electrical supply to the boiler is on;
· The gas service cock is open;
· The system pressure is as required;
· The boiler is not blocked.
9. Gas change
These boilers produced for natural gas can be converted to work with
LPG.
Any gas change must be effected by a Qualified Service Engineer.
Safety device indicators - activation
14
Drain point