Installation & Operation Manual Merlin GDP4
Rev: 11 03-21
7
Factory Set Condition
SWITCH
CONDITION
BMS
OFF
AUTO RESET
OFF
ZONE 1
OFF
ZONE 2
OFF
ZONE 3
OFF
ZONE 4
OFF
Trouble Shooting
Fault.
Possible Cause/Correction.
Detector not responding.
o
Incorrect wiring
o
Zone switches not properly configured
Panel not responding.
o
Incorrect Wiring
o
No Power
o
Auto-Reset not properly configured
Operation
Initial Power-Up (Commissioning)
On connecting mains power, press reset to start the testing sequence. The system will close the solenoid valve
when an emergency stop has been pressed, gas has been detected or any alarm signal has been triggered.
When the system is connected to the mains power supply, the Power LED will illuminate RED.
LED Indicator Status
Power
Power LED will illuminate RED when power is supplied. When no power is present, this LED will not light up.
Gas On
On start up the Gas on LED will flash for one minute to check for gas detected. If no gas detected or any other faults
the gas valve will open and the Gas On LED will illuminate.
GREEN = Gas On OFF = Gas Off
If the test is unsuccessful, the relevant zone LED light will illuminate to indicate a fault.
EM Stop
If an emergency shut off button (either remote or on the panel) is pressed, the LED will illuminate AMBER and the
gas will be turned off. The EM Stop button must be re-set before restarting the system.
Heat Detector
If the fusible link melts at >72° C, the LED will illuminate AMBER and the gas valve will de-energise.
Fire Alarm
On a fire alarm, the LED illuminates AMBER and gas supply isolated. The alarm must be reset before restarting the
system. Off = OK AMBER = Fire alarm activated.
Zones 1-2-3-4
Under normal working conditions this LED is GREEN. If the gas detector connected reaches the low level alarm this
will show AMBER. If the gas detector connected reaches high level alarm this will show RED and the gas solenoid
valve will close.
