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CIRCULATION PUMP.
The boiler is supplied with circulator fitted with speed regulator.
These settings are suitable for most systems.
In fact, the pump is equipped with electronic control to set
advanced 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.
By-pass Regulation.
The boiler leaves the factory with all bypasses open.
If necessary, the by-pass can be regulated to system requirements
from minimum (by-pass closed) to maximum (by-pass open).
Adjust using a flat head screwdriver, turn clockwise and open
the by-pass, anticlockwise it is closed.
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.
Key:
1 - Function selection button
2 - 2 Green (G) / red (R) LED
3 - 3 yellow LEDs (Y)
Circulating pump LED
(first red LED)
R
Y
Y
Y
Y
R
Y
Y
Y
Y
R
Y
Y
Y
Y
12
Description
Pump blocked
mechanically
Abnormal situation (the circula-
tor continues operating).
low power supply voltage
Electrical fault
(Circulator pump blocked)
ATTENTION:
the circulator has various built-in ope-
ration modes, however the constant
curve operation mode must be selected ac-
cording to the following table.
Circulating pump LED
G
G
Y
Y
Y
G
G
Y
Y
Y
G
G
Y
Y
Y
G
G
Y
Y
Y
G
G
Y
Y
Y
G
G
Y
Y
Y
G
G
Y
Y
Y
G
G
Y
Y
Y
G
G
Y
Y
Y
Constant curve: the circulator operates maintaining constant
speed.
The pump is set at "Constant curve speed 3" by default.
Real time diagnostics: in the event of malfunction the LEDs
provide information on the circulator operation status, see table
(Fig. 13):
Diagnostics
The circulator pump cannot
restart automatically due to an
anomaly
Voltage off range < 160 Vac
The circulator is locked due to
power supply too low or serious
malfunction
29
Description
Do not use
Do not use
Do not use
Do not use
Do not use
Do not use
Constant curve speed 1
Constant curve speed 2
Constant curve speed 3
Remedy
Wait for the circulator to make
automatic release attempts or
manually release the motor shaft
acting on the screw in the centre
of the head.
If the anomaly persists replace
the circulator.
Check power supply.
Check the power supply, if the
anomaly persists replace the
circulator.
13
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