Table of Contents
Advertisement
LED (mode)
Alarm effect
Prolonged operation
Alarm condition: the pump runs continuously for more than 8
hours.
ON 5 flashes
LED indication Manual reset
Excessive number of start-ups per hour
Alarm condition: the pump starts up more than 60 times per hour.
ON 10 flashes
LED indication Manual reset
1)
Manual reset is required after 3 unsuccessful attempts within 5
minutes.
2)
Manual reset is required after 3 unsuccessful attempts within 60
minutes.
In case more than one alarm is present simultaneously, only one
alarm is displayed, according to the priority in the above list.
To manually reset the alarms, push STOP button for 5 seconds. All
alarms are reset. In case an alarm is still present, the LED will light
up again.
9.1.1.7 Signalling outputs (potential-free contacts) for jockey
pump
For the supervision of the jockey pump, the outputs listed below are
provided:
Signalling
Description
Start of the jockey pump
Pump in
Closed contact indicates that the pump is
operation
running.
Thermal protection tripping, protection against
dry-running, power supply failure, non-automatic
General alarm
mode of operation, an excessive number of close
(cumulative)
start-ups, prolonged operation.
Closed contact indicates an alarm.
Contact type: AC1, potential-free relay contacts.
Max. voltage: 115 V.
Max. current: 2 A.
9.1.1.8 Modbus communication
The control panel is equipped with a communication interface for
Modbus RTU networks, therefore it can be integrated into a
supervision system. Through an appropriate configuration, it is
possible to remotely view all the information available in the panel,
including the status of the LEDs and all the alarms.
Refer to the dedicated instructions (part of the scope of supply) for
the Modbus configuration.
22
Factory
Reset
setting
Inactive
Active
9.1.2 Control panel for the duty electric pump
The duty electric pumps are controlled by an independent control
panel which provides easy reading of the measurement instruments
and signals from a single observation point.
The starting of the electric motors is available as standard in the
following configurations:
•
direct-on-line, DL, for powers up to 30 kW
•
star-delta, SD, for powers from 37 kW and higher.
To ensure greater safety for operators, the control pressure switch
is powered by low voltage isolated from the mains by a transformer.
D
B
Control panel for the electric pump
The panel includes the following components and functions
available in the door:
Pos.
Component
A
Ammeter
TEST-0-AUT operating mode selector with a
B
removable key in AUT position
C
Main switch, padlockable
EPC 300 control unit with buttons and warning
D
lights
A
C
Advertisement
Table of Contents
