9
4
5
INS
TALLER
US
ER
MAINTEN
AN
CE
TECHNI
CI
AN
TECHNI
CAL
D
AT
A
1.7 CIRCULATION PUMP.
The boiler is supplied with pump fitted with speed regulator.
These settings are suitable for most systems.
In fact, the pump is equipped with electronic control to set ad-
vanced functions. For proper operation one must select the most
suitable type of operation for the system and select a speed in the
available range, with a focus on energy savings.
Selection of operating mode.
When running, the pump indicates the set configuration by means
of the codified lighting of the LEDs. The setting is changed by a
short pressing of the button.
Attention:
The pump has various built-in operating modes,
however the constant curve operating mode must be selected
according to the following table.
Circulating pump LED
Description
G
Y
Y
Y
G
Do not use
G
Y
Y
Y
G
Do not use
G
Y
Y
Y
G
Do not use
G
Y
Y
Y
G
Do not use
G
Y
Y
Y
G
Do not use
G
Y
Y
Y
G
Do not use
G
Y
Y
Y
G
Constant curve speed 1
G
Y
Y
Y
G
Constant curve speed 2
G
Y
Y
Y
G
Constant curve speed 3
Constant curve: the pump operates maintaining constant speed.
The pump is set at “Constant curve speed 2” by default.
Real time diagnostics:
in the event of malfunction the LEDs pro-
vide information on the pump operation status, see table (
Fig. 5
):
Key:
1 - Function selection button
2 - 2 green (G) / red (R) LEDs
3 - 3 yellow (Y) LEDs
Circulating pump LED
(first red LED)
Description
Diagnostics
Remedy
R Y
Y
Y
Y
Pump blocked
mechanically
The pump cannot restart auto-
matically due to an anomaly
Wait for the pump to make auto-
matic release attempts or manu-
ally release the motor shaft acting
on the screw in the centre of the
head.
If the anomaly persists replace the
pump.
R Y
Y
Y
Y
Abnormal situation (the
pump continues operating).
low power supply voltage
Voltage off range < 160 Vac
Check power supply
R Y
Y
Y
Y
Electrical fault
(Pump blocked)
The pump is locked due to
power supply too low or seri-
ous malfunction
Check the power supply if the
anomaly persists replace the pump