4
lIGhtING aND
oPEratIoN
BoIlEr IGNItIoN (fig. 24)
The first ignition of the boiler must be
carried out by qualified technical person-
nel.
Successively, if it is necessary to start
up the boiler again, adhere strictly to the
following instructions: open the gas tap
to allow the flow of the fuel and move the
main switch of the system to “ON”.
When fuel is fed to the boiler, a sequence
of checks will be carried out and the di-
splay shows the normal condition of the
functioning, always indicating the pres-
sure of the system.
If the blue luminous bar is on, this indica-
tes the presence of voltage.
Press the key
5
3
1
2
4
of the controls (pos. 2)
to activate the winter function. The di-
splay will be as shown in the figure.
N.B.: the first key press acts only to
illuminate the display, successive key
presses will be recognised to alter the
mode or value.
rEGulatIoN of thE WatEr tEMPE-
raturE for hEatING (fig. 25)
To set the temperature of the water for
heating, press the key
of the controls
(2).
The first time the key is pressed, the
SET of heating circuit 1 is selected. The
second time it is pressed, the SET of he-
ating circuit 2 is selected. The display will
be as shown in the figure. Change the va-
lues with the key
5
3
1
2
4
and
5
3
1
2
4
.
Standard visualisation will return to the
display by pressing the key
again, or
after 10 seconds if no key is pressed.
regulation of the external sensor (fig.
25/a)
If an external sensor is installed, the
value of the output temperature is au-
tomatically chosen by the system, which
quickly adjusts the environmental tem-
perature on the basis of the external
temperature.
If you wish to change the value of the
temperature, increasing or decreasing
that calculated automatically by the elec-
tronic card, proceed as indicated in the
preceding paragraph.
The level of various correction of a value
of temperature proportional calculated.
The display will be as shown in fig. 25/a.
to sWItch off thE BoIlEr
(fig. 24)
In the case of a short absence, press the
key (
5
3
1
2
4
) of the controls (pos. 2).
The display will be as shown in the fig. 24.
In this way, leaving the electricity and the
fuel supply connected, the boiler is pro-
tected from frost and from the pump be-
coming jammed. If the boiler is not used
for a prolonged period, it is advisable
APRE
2
2
2
Circuito
riscaldamento 2
Circuito
riscaldamento 3
(impianto tre
zone)
Fig. 24
APRE
2
2
2
Circuito
riscaldamento 2
Circuito
riscaldamento 3
(impianto tre
zone)
Fig. 25
Fig. 25/a
APRE
2
2
2
Circuito
riscaldamento 2
Circuito
riscaldamento 3
(impianto tre
zone)
APRE
2
2
2
Circuito
riscaldamento 2
Circuito
riscaldamento 3
(impianto tre
zone)
Heating circuit
Heating circuit 3
(3 zone system)
Summary of Contents for MURELLE HE 50 R
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