2.
If the unit is not installed with a detector, the anode of zone loop should be connected to
terminal "2" and cathode to terminal "3" as shown in Fig. 3.
VI Testing
Warning: Power up only after all devices are well connected.
1.
Test should be made to the unit after installation and at least once half a year after put
into operation.
2.
Before testing, notify the proper authorities that the system is undergoing maintenance
and will temporarily be out of service. Disable the zone or system undergoing
maintenance to avoid unwanted alarms.
3.
Remove a detector at any position of the tested zone loop, the system should alarm
fault.
4.
When the fault is not cleared, make any one of other detectors or manual call points
alarm fire, the system should also alarm fire.
5.
Carry out "clear" operation on the controller, the fault and fire should be cleared.
6.
After testing, resume the unit. Notify the proper authorities the system is back in
operation.
7.
If a unit fails in testing, check its connection and test again. If it still fails, return for
repair.
VII Troubleshooting
1.
The system alarms fault after power up:
Check power supply to the zone loop.
2.
The system alarms unwanted fire alarm after power up:
Check polarity of power supply to the zone loop reverse or not.
VIII Cautions
1.
Polarity of zone loop should not be reversed.
2.
When the detector is removed, make sure the diode be in sequence in the circuit.
Global System Technology PLC London EC1R 3AU England
http://www.gstplc.com
Email [email protected]
Global System Technology PLC
The Intelligent Solution
O-
O+
Output end of
multi-wire
fire alarm
controller or
intelligent
zone monitor
unit
Conventional Detector
Conventional Detector
Active End of Line Unit
Diode
Diode
O-
O+
Diode
Diode
Conventional Detector
Conventional Detector
Active End of Line Terminal
Output end of
multi-wire
fire alarm
controller or
intelligent
zone monitor
unit
Fig. 2 System composition when the unit used as detector base
Fig.3 System composition when the unit not used as a detector base
