12
Fig.8 - Commands panel
1
Adjustment knob frequency (%) of the number of injections
2
START/STOP button
3
Button function selection: full scale 20/100% / entrance 1:1; activation and deactivation function UNDER-
LOAD / OVER-LOAD held down for 5 sec.
4
1:1 function display external signal “green” LED
5
100% flow scale read out “green” LED
6
20% flow scale read out “green” LED
7
UNDERLOAD mode alarm (green LED), OVERLOAD mode alarm (red LED)
8
STAND BY mode (green LED flashing), operation mode (red LED flashing)
Commands description
a)
START/STOP button controls the activation and deactivation of the pump. Under stand-by mode (STOP) the green LED (8)
flashing at long intervals;
b)
LED (8) signals the injections of the pump, “red” LED flashing, the pump operates;
c)
FLOW RATE ADJUSTMENT (knob 1) adjust the injection/minute of the pump until 100% of the maximum flow rate;
d)
FLOW RATE SCALE READ OUT;
e)
ALARM LEVEL: the pump is predisposed for level alarm (see section), the level alarm, the pump stop dosing and the LED
(8) lights up red color;
f)
UNDER-LOAD (see section), the pump stop dosing and the red LED lights up;
g)
OVER-LOAD (see section), the pump stop dosing and the red LED lights up;
UNDER-LOAD and OVER-LOAD functions
The innovative HRS technology has allowed to create a range of metering pumps capable of detecting pressure changes
within the plant or malfunctions associated with these changes. The pump is able to provide you with useful information about the
status operation. This is possible through two types of signals.
a) UNDER-LOAD: where, in normal operation, the pump is missing the fluid, in addition to the normal lack of additive in the
tank, could be caused by problems on the suction line: filter clogged or damaged valves, the pump is placed in a state of UNDER
LOAD . This condition is indicated by the LED red lights up (7) and the pump stops after about 10 injections.
b) OVER-LOAD: The pump, during normal operation, performs a real-time control on the pressure conditions inside the plant
to be treated. If this pressure exceeds the maximum allowed (factory default), the pc-board of the pump reacts lighting up the red
LED (7) and stop the dosing after about 10 injections.
The OVER-LOAD and UNDER-LOAD functions can be enabled and disabled by pressing and holding (for about 5 seconds)
the 20/100% button (3). A triple blink of the red LED (7) indicates that the function has been enable, while a triple blink of the
