Function Uni 10779 On Electric Pump; Pressure Switch Test; Light Signal Test; Manual Operation - Grundfos Hydro EN Installation And Operating Instructions Manual

11.1

Function UNI 10779 on electric pump

In the standard scope of supply it's always included an adjust-
able timer to automatically switch off the duty pump that allows
operation as described in the UNI 10779.
This function is disabled at the factory and if necessary can be
activated by the user during commissioning by following the
steps below.
• Set the operation mode selector on "0"
• Power up the control panel putting the main switch in ON
position: the green LED lit and the pump is stopped.
• Simultaneously keep pressing the buttons 0 (manual stop),
and TEST LED for more than 5 sec.; during this operation all
the LEDs are lit.
• After 5 sec. will remain lit and flashing LEDs P1 and P2.
• Release the buttons 0 (manual stop) and TEST LED.
• By pressing the button I (manual start) the function can be
activated and the desired time can be set. Each press of the
button I (manual start) lights a different LED of the second
line with the meaning given in the following table:
• After selecting the desired setting, wait about 10 seconds
without pressing any button; the control panel will save the
configuration.
To check the status of the automatic stop, repeat the first five
steps, the LED lights will indicate the setting of the timer. After
10 sec. the system will exit from the programming phase back
in standard mode.
11.2

Pressure switch test

Two pressure switches for each main pump are required on the
fire-fighting main pumping sets, as specified in the EN 12845
standard.
The operation of every single pressure switch must be checked
regularly, and for this reason the control panels are equipped
with a device that allows the check of the proper operation for
every single pressure switch.
• Set the key selector on TEST.
• Press button P1.
• Open the valve in order to make the system pressure drop
down; the panel will start the pump through the P1 (pressure
switch 1).
• Close the water valve and wait for the system to reach nomi-
nal pressure; switch off the pump by pressing the button 0
(manual stop).
• Press P2 and repeat the instructions in the previous point to
verify correct operation of pressure switch 2.
11.3
Press the specific button: all the warning lights will light up,
showing their correct operation.
11.4
• Set the key selector on TEST and start the motor by pressing
• Stop the motor by pressing the button 0 (manual stop).
11.5
• Set the key selector on AUT.
• To lowering of the fire network pressure, the pressure
• The pump can be stopped by positioning the key selector on
12.
The duty diesel driven pump is controlled by an independent
control panel, which provides easy reading of the measurement
instruments and signals from a single observation point.
The outputs listed below in accordance with the EN 12845
standard are provided for supervising the pumping set from a
Function status
system control room:
Contact type: AC1, potential-free relay contacts,
Max. voltage: 115 V
Function disabled.
Max. current: 2 A
5 minutes delay.
Refer to the specific section in this manual and to the wiring
10 minutes delay.
diagram for the connection and functionality of each output.
The panel is supplied by both starting batteries and is off when
20 minutes delay.
the general panel disconnecting switch (ref. A) is in position 0.
40 minutes delay.
The system allows the diesel pump to be started in manual
(TEST) or automatic (AUT).
60 minutes delay.
When there is an automatic start request, the system executes
6 motor start attempts, 3 on each battery alternatively.
The engine can be stopped only manually by moving the selec-
tor (ref. F) from AUT to TEST and pressing the button 0 (manual
stop) (ref. D).
For applications in hose reel systems, the main pumps can be
automatically stopped by a adjustable timer inside the panel.
By using the manual start button I (ref. E), it is possible to start
the engine, there will be a starting batteries changeover every
time it is pressed until the engine starts.
By means of two electronic battery chargers inside the panel,
the batteries are maintained at a full charge without any risk of
damage.
When there is no mains voltage, the signals BATTERY
CHARGER 1 FAILURE, BATTERY CHARGER 2 FAILURE and
LINE (LED off) are present.
Two independent battery chargers and all the electromechanical
components needed are housed inside the panel.

Light signal test

Manual operation

the button I (manual start); run the necessary tests.

Automatic operation

switches will provide the input for the starting of the pump.
TEST and pressing the button 0 (manual stop).
Control panel of the duty diesel driven
pump
13