9
INS
TALLER
US
ER
MAINTEN
AN
CE TECHNI
CI
AN
1.15 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 op-
eration 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
(Part. 19 Fig. 9)
.
The boiler
leaves the factory with the bypass 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. Turning clockwise
opens the bypass and anticlockwise closes it.
Display of operation status.
During normal
operation the status LED (2) is on green, the four
yellow LEDs (3) indicate circulator absorption
according to the following table:
Circulating pump LED
Absorption
G Y
Y
Y
Y
On On Off Off Off
0 ÷ 25 %
G Y
Y
Y
Y
On On On Off Off
25 ÷ 50 %
G Y
Y
Y
Y
On On On On Off
50 ÷ 75 %
G Y
Y
Y
Y
On On On On On
75 ÷ 100 %
Selection of operating mode.
To see the current
operation mode it is sufficient to press button
(1) once.
To change operation mode press the button for
between 2 to 10 seconds until the current config-
uration flashing, each time the button is pressed
all possible functions are scrolled cyclically. After
a few seconds without doing any operation the
circulator memorises the selected mode and goes
back to operation display.
Attention:
The circulator has various built-in
operation modes, however the constant curve
operation mode must be selected according to
the following table.
Circulating pump LED
Description
G Y
Y
Y
Y
On On On Off Off
Do not use
G Y
Y
Y
Y
On On On On Off
Constant curve
speed 2
G Y
Y
Y
Y
On On On On On
Constant curve
speed 3
(default)
G Y
Y
Y
Y
On On On Off On
Constant curve
speed 4
Constant curve: the circulator operates maintain-
ing constant speed.
Selection button lock.
The button has a feature
that locks its operation to prevent accidental
modifications, to lock the control panel it is
necessary to press button (1) longer than 10
seconds (during which the current configuration
flashes), the active lock is signalled by all LEDs of
the control panel flashing. To unlock the button
press again longer than 10 seconds.
Real time diagnostics:
in the event of mal-
function the LEDs provide information on the
circulator operation status, see table
(Fig. 6 - 7)
:
