Kentec Electronics Sigma XT+ - Maintenance

Man-1112 Sigma XT+_23 Page 45 of 52
K21083M4 and K21084M4 models have a temperature compensation
sensor held in place on the power supply chassis with adhesive tape. The
tip of the sensor must be fitted to one of the batteries with the tape
supplied for correct temperature compensation.
Battery leads are supplied wired to the power supply along with a link to connect the two batteries together.
It is most important that the polarity of the batteries is carefully observed when connecting. Wrongly
connected batteries could cause damage to the control panel.
21. Maintenance
SIGMA XT+ control panels do not require any specific maintenance but should the control panel become dirty it
can be wiped over with a barely damp cloth. Detergents or solvents should not be used to clean the panel and
care must be taken that water does not enter the enclosure.
The control panel contains sealed lead acid batteries to provide standby power in the event of mains failure.
These batteries have a life expectancy of around 4 years. It is recommended that these batteries be tested in
accordance with the battery manufacturer’s recommendations annually to determine their suitability for continued
standby applications.
Testing of the extinguishant system should only be carried out by trained personnel and must be done with
appropriate isolation measures in place to ensure that accidental discharge of the extinguishant agent is avoided.
Should the control panel become faulty the complete electronic assemblies and front plates can be replaced.
To do this, any configured options should be noted then both mains and battery power should be removed before
the work is started.
The field wiring should be carefully labelled and removed from the terminals. The power terminal block can be
unplugged from the PCB by pulling it towards you.
The faulty PCB plate assembly can now be taken out of the panel by removing the 2 screws.
Fitting the new PCB is the reverse of the procedure for removing the board.
BATTERY
TEMPERATURE
SENSOR WIRE
TEMPERATURE
SENSOR
TAPE