Use And Programming; Combo Operating Mode - Pentax IPFC 109 Manual De Instrucciones

4. valve
5. valve
6. pressure sensor
The expansion tank, in water systems equipped with EPIC,
compensates leaks (or minimum water consumption) and
maintains the pressure when the pump is stopped, prevent-
ing excessively frequent start/stop cycles.
It is essential to choose the correct volume and pre-charge
pressure of the expansion tank. Excessively low volumes do
not allow effective compensation of minimum water con-
sumptions or leaks when the pump is stopped. On the other
hand, excessively high volumes complicate the control of
the pressure made by EPIC, besides involving an economic
and space waste.
Place an expansion tank with a volume equal to 10% of the
maximum flow rate required, considered in litres/minute.
E.g.: if the maximum flow rate required is 60 litres/min, use
a 6-litre expansion tank.
The pre-charge pressure of the expansion tank must be
equal to 80% of the operating pressure.
E.g.: if the pressure set in EPIC, to which the system must
be kept independently from water consumption, is 4 bar, the
pre-charge pressure of the expansion tank must be about
3.2 bar.

9. Use and programming

The red STANDBY LED switches on when the device is
powered.
Then, the green SET LED starts blinking to indicate that the
device is ready to start in a constant pressure control mode.
STARTING THE PUMP Press PLAY to start the pump.
The green PLAY LED blinks with variable frequency: the
closer the measured pressure is to the set pressure and the
higher the frequency.
STOPPING THE PUMP
Press STOP to stop the pump. The green PLAY LED
switches off.
MODIFICATION OF THE PRESSURE
Have a pressure gauge placed close to the pressure sen-
sor. Open a tap with low flow to help the setting.
8
To modify the pressure:
· Start the pump.
· If the SET LED blinks, hold key + down until the SET LED
remains on.
· Then press keys + or - to modify the pressure value.
MANUAL START UP OF THE PUMP WITH FIXED FRE-
QUENCY If the pressure sensor is disconnected or failed,
the corresponding alarm is triggered (see alarm list). The
pump can be started manually with fixed speed by holding
the PLAY key down for at least 5 seconds.
The pump starts at a minimum frequency of 20 Hz. Press
keys + or - to vary the frequency. If the SET LED is off, hold
key + or - down until the SET LED switches on.
EXTERNAL FREQUENCY OPERATION The pump fre-
quency (speed) can be varied with analogue input AN2 (0-
10VDC).
Make sure the pressure sensor is not connected to ana-
logue input AN1.

10. COMBO operating mode

To allow two EPIC devices to communicate with each other
within a unit, connect the RS485 serial ports with a bipolar
cable with minimum 0.35 mm
Every EPIC must be equipped with its pressure sensor in
COMBO operating mode.
We recommend equipping every device with independent
circuit breaker and residual current protection in order to
guarantee the operation of the unit in the event one unit
fails.
We recommend following the procedure below upon the first
start up:
1. Connect the two devices via serial with power supply
disconnected.
2. Power one of the two devices.
3. Wait at least 30 seconds and then power the second
device.
2
section.