Riello ALUDOMUS SOLAR KV/200 20 ISC SOLAR Installation And Maintenance Manual page 15

ADJUSTING THE PUMP
The boiler's pump is ErP 2015 Ready, and suitable for
use in central heating only/domestic hot water applica-
tions. The pump can be controlled by an external PWM
signal and has 4 different pressure curves for central
heating applications.
When controlled by a PWM signal, pump speed varies
according to the frequency of the incoming PWM signal,
modulating head/flow rate on the basis of the selected
curve.
In the absence of a PWM signal, the pump runs at full
speed and delivers the head/flow rate determined by
the selected curve. Each curve is characterised by a
maximum head expressed in metres.
User interface
The user interface features one button (1), one red/
green LED (2) and four yellow LEDs.
BUTTON (1)
Via this interface, users can access:
− Functioning (performance display) mode. Pump
performance is displayed during functioning as
a % of current draw with respect to rated load.
Alarm conditions can be seen from the colour of
LED (2).
− Setting mode. Setting mode is accessed by
pressing the button (1), and is used to select the
pump curve.
LED(2)
15
Display Meaning
LED 1 flashing green Stand-by (only
with PWM
control)
LED 1 green and LED 2 Low load
yellow, both lit
LED 1 green and LEDs 2, Low-medium
3 yellow, all lit load
LED 1 green, LEDs 2, 3, Medium-high
4 yellow, all lit load
LED 1 green, LEDs 2, 3, High load
4, 5 yellow, all lit
PUMP LOAD CURVE
75 %
50 %
25 %
Functioning mode
A) Performance display
When the pump is functioning, LED 1 is green. The four
yellow LEDs indicate the instantaneous power draw as
shown in the table above. In functioning mode, all ac-
tive LEDs are lit (not flashing) to differentiate this con-
dition from setting mode. If the pump is stopped by the
external control signal, LED 1 flashes green.
B) Alarm display
If the pump detects one or more alarm conditions, LED 1
changes from green to red. When an alarm is active, the
LEDs indicate the type of alarm as shown in the follow-
ing table. If more than one alarm is active at the same
time, the LEDs only show the alarm condition with the
highest priority. Alarm priority follows the order of the
table.
When no alarm is active, the user interface automati-
cally displays pump performance.
GENERAL
% power
0
0-25
25-50
50-75
75-100
100 %