SFA ZPS 2.3 Manual De Instalación página 22

EN
4.5 UTILISATION OF THE INTERNAL SENSOR
An internal sensor, a pressure sensor 0 to 10 kPa is used (0 to 1 mWs, 0 to 100 mbar). Other measurement ranges can be real-
ised on demand. On the lower side wall, a hose screw connection 6/8 mm is located which is intended for the connection of the
immersion pipe. The sensor used is designed as a differential pressure converter, so that barometric variations are eliminated.
The menu item "internal converter – adjustment" serves for the accurate adjustment of the zero point.
NOTICE
 In order to equalise possible air leaks inside the pneumatic level measuring device, the pilot tube has to be fully
emerged from the water after completion of the pumping process. For this purpose, the adjustment of a follow-up
time of the according duration is necessary.
 The hose of the pneumatic device must always have a continuous positive slope from the pilot tube to
the control unit. Alternatively, the small-size compressor set for the air bubbler level measurement system can be
used.
4.6 SIGNAL CONTACTS
The 4 potential-free signal contacts are located in the upper circuit board (left).
The 4 signal contacts are free programmable: the contacts 1 and 2 are opened in case of power failure and the contacts 3 and
4 are closed in case of power failure.
If the power supply of the control is okay, then the signal contacts are closed in case of a fault or signal.
5. COMMISSIONING OF THE CONTROL SYSTEM
After the complete connection of the pump cables, the mains power supply and the level sensor, the parameters can be set
after the mains voltage has been applied. Only trained personnel are allowed to set those parameters.
Now the plant can be commissioned by pressing the key
have to be checked, and, if necessary, corrected.
Checking of the control system without pumps
In order to be able to check the control system without a pump, the following standard settings are required:
• Connect the control system to a single-phase network (connection of N and L1),
• Set motor current limitations for both pumps to 0.0 A,
• Switch off rotary field,
• Bridge thermal contacts TH2 and TH4,
• Disable thermic error for pump 1 and pump 2.
If the respective level sensors are connected, all program functions can be checked without having to connect the pumps.
6. OPERATION
The electronic pump control is equipped with a key lock. To unlock, please press and hold WAHL/QUIT
(Selection) for 3 seconds. There will be an indication in the display. Approximately 1 minute after the last
actuation of any key the keyboard will be locked again.
The automatic key lock after 1 minute can be deactivated in the menu, e.g. to aid with maintenance
works. The keylock is enabled with the service mode switched-off only.
6.1 OPERATOR CONTROL PANEL
①
LCD display
(2 lines with 16
characters)
AUTO
. During the conduction of several test runs, the set switch points
③
Signal-LED indicating when the pump is
operating :
- green: pump is on
- red: fault
22
②
Short travel key
switches