Leak alarm type LWG 2000
part no. 15 073 57 c
5 / 16
Activity
Qualification
storing, transporting, unpacking OPERATION
trained personnel
ASSEMBLY, MAINTENANCE
START-UP, SHUT-DOWN , REPLACEMENT,
RESTART, RESTORATION, DISPOSAL,
qualified personnel, customer service
ELECTRICAL INSTALLATION
qualified electrician
TROUBLESHOOTING
qualified personnel, customer service
qualified electrician, trained personnel
FUNCTION DESCRIPTION
The probe is fitted with a PTC thermistor, which is installed at the lowest point of the
containment facility to be monitored.
In correct operation, the PTC thermistor is surrounded by air and is heated constantly with a
probe heating circuit. When the temperature changes, the PTC thermistor changes its
electrical resistance as soon as liquid comes into contact with the PTC thermistor as the result
of a leak. This causes the display unit to trigger an alarm.
The alarm is reset only when the leak is eliminated. The display unit switches back to
monitoring mode:
•
green LED "Betrieb [Operation]"
•
The device that is connected via the potential-free relay contact can be restarted.
DESIGN
Green LED "Betrieb [Operation]"
Switch "Alarmton [Buzzer]"
Seal
Red LED "Alarm"
Button "Prüfen [Test]"
Probe
Connection cable
The display unit is intended to be attached to a wall and contains the power supply, the
display and operating elements and all the components to evaluate the signal from the
connected probe.
The alarm on the display unit is:
•
displayed optically via the red LED "Alarm" and
•
acoustically via a buzzer.
The display unit also has a potential-free relay contact to connect an external power supply,
e.g. a burner pump, motor, warning light, acoustic signal generator or accessories from the
safety system type F-Stop
®
GWG-LWG.
