Table of Contents
Advertisement
9.1.3.5 Testing the pressure switches for diesel pump
Two pressure switches for each main pump are required on
the firefighting main pump 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.
Before starting the following procedure, make sure that
the LEDs of the buttons P1 and P2 are switched off.
If the LEDs are OFF, you can follow the procedure below to test the
pressure switches.
If the LEDs are ON with a steady light, follow the procedures in the
dedicated section for checking the emergency starting circuit.
1. Set the key selector on TEST.
2. Press button P1.
• The corresponding LED light flashes.
3. Open the valve in order to make the system pressure
drop down.
• The panel will start the pump through P1 (pressure switch 1).
4. Close the water valve, and wait for the system to
reach the nominal pressure.
5. Switch off the pump by pressing the STOP button.
6. Press button P2, and repeat the above procedures to verify the
correct operation of pressure switch 2.
Related information
9.1.3.7 Checking the emergency starting circuit
10.2.6 Checking the performance of the pump set
9.1.3.6 Testing the light signal
1. Press the LEDS TEST button.
• All the warning lights will light up, showing their correct
operation.
Related information
10.2.6 Checking the performance of the pump set
9.1.3.7 Checking the emergency starting circuit
As specified in the EN 12845 standard, the control panel of the
diesel pump is equipped with two buttons, P1 and P2, protected
by a breakable glass for the emergency starting of the diesel
engine. A periodic test must be carried out for checking the
operation of these buttons without breaking the glass.
The buttons P1 and P2 are also used for testing the pressure
switches as described in the dedicated section for testing the
pressure switches.
For the emergency starting circuit, the buttons P1 and P2
automatically become active and the yellow LEDs of the buttons are
permanently on (as required by the standard) only in the following
two cases:
•
after an automatic engine start followed by a stop
•
after six unsuccessful attempts to start.
You can run the test when the LEDs of the buttons
are permanently on.
1. Press the button P1 until the engine starts.
2. Press the engine STOP button to stop the engine.
The LED of the button P1 is switched off.
3. Repeat the test with the second button P2.
The test is completed when the LEDs of both buttons are off.
Related information
9.1.3.5 Testing the pressure switches for diesel pump
10.2.6 Checking the performance of the pump set
9.1.3.8 Automatic stop function for diesel pump
In some countries and for specific applications, it is allowed for
the duty pump to stop automatically.
When this function is enabled, the duty pump stops automatically
when the pressure in the system exceeds the stop threshold of the
starting pressure switches, and remains there for a certain period of
time which is set by an adjustable timer.
This function is disabled in the factory and can be activated by the
user following the procedure described in the dedicated section for
setting the operating parameters.
Related information
9.1.3.3 Automatic operating mode of diesel pump
9.1.3.10 Setting the operating parameters
9.1.3.9 Adjusting the contrast of the LCD display
1. To optimise the readability of the LCD display, use the UP and
DOWN buttons to increase and decrease the contrast of
the display.
9.1.3.10 Setting the operating parameters
When the control panel is connected to the mains, it
automatically sets the ON start time to 16 seconds and
the OFF start time to 11 seconds for the commissioning
test according to the EN 12845 standard. This condition is
kept for 12 hours. After that, the time set by the user takes
effect.
The DPC 300 control panel offers the possibility to customise the
operating parameters.
The procedure to select and customize the various parameters is
described below:
1. Set the key selector to position 0.
When pressing the P button, the green LED next to the button
lights up.
2. Browse the menu to select the desired parameter using the
UP and DOWN buttons.
When the ENTER button is pressed, the green programming
LED flashes.
3. Set the desired value of the selected parameter using the
UP and DOWN buttons.
4. Press the ENTER button to confirm the value.
5. Press the P button to exit programming.
6. At the end of programming, switch off the control panel and
then switch it back on using the general main switch.
The control panel of the diesel pump is supplied calibrated and
tested at the factory and does not need any calibration.
Modifying the calibration parameters of the control
panel may jeopardise proper operation of the
pump set. Recalibration must be carried out only by
qualified persons.
Recalibrating some parameters as described below may be useful
only in the case of special requirements related to service
operations.
Related information
9.1.3.8 Automatic stop function for diesel pump
27
Advertisement
Table of Contents
