48
shown in the figure. Set the values with
the buttons (
5
3
1
2
4
and
5
3
1
2
4
).
To return to the standard display, press
the button (
) or just leave it alone for
10 seconds.
REGULATION WITH AN EXTERNAL
SENSOR CONNECTED (fig. 25/a)
With an external sensor installed, the de-
livery temperature is automatically set by
the system, which quickly adjusts the am-
bient temperature as the outdoors tem-
perature varies.
To increase or decrease the temperature
setting relative to the controller's calcu-
lated value, proceed as indicated in the
previous paragraph. The correction varies
by a calculated proportional calibration
value. The display should be as shown in
figure 25/a.
TURNING THE MODULE OFF (fig . 24)
If you are going to be absent for a short
time, press the control button (
5
3
1
2
4
) (pos.
2).
The display should be as shown in figure
24.
This leaves electrical power and gas avail-
able so that the boiler is protected by the
anti-freeze and pump protection systems.
If you are not going to be using the boiler
for a long time, it is best to shut off elec-
trical power with the main switch and
close the gas valve. If very low temper-
atures are forecast, it is best to drain the
water circuits to prevent the pipes burst-
ing when the water freezes.
TROUBLESHOOTING
When a malfunction is detected, the dis-
play will show an alarm and
the light bar
turns red
.
We describe the potential faults, their
alarms and solutions below:
–
ALL 02 (fig . 27/a)
If the water pressure falls below 0.5
bar, the boiler turns off and the display
shows fault ALL 02.
Restore pressure until the display
shows a pressure of 1.5 bar.
If you need to refill the system re-
peatedly, contact your local Technical
Service Centre to have your heating
system checked for leaks .
–
ALL 03
Contact your local Authorised Techni-
cal Service Centre .
–
ALL 05
Contact your local Authorised Techni-
cal Service Centre .
–
ALL 06 (fig . 27/c)
Press the control button (
5
3
1
2
4
) (2) to
restart the boiler.
If the fault persists, contact your local
Authorised Technical Service Centre .
Fig. 25
Apre
2
2
2
Circuito
riscaldamento 2
Circuito
riscaldamento 3
(impianto tre
zone)
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)
Fig. 27/a
Heating circuit 2
Heating circuit 3 (3
zone system)
Summary of Contents for MURELLE 110 BOX ErP
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