Installation & Operation Manual Merlin GDP2
Rev: 09 01-20
9
OPERATION
First Power Up
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
When the system is connected to the mains power supply, the Power LED will illuminate RED.
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 being 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.
OFF = OK
AMBER = EM Stop button pressed
Heat Detector
Under normal working conditions this LED is off. If the fusible link melts at 72 Degrees Celsius or
higher, the LED will show AMBER and the Gas valve will turn off.
Fire Alarm
If the fire alarm panel has been activated, the LED will illuminate Amber and the gas will be
turned off. The Fire alarm panel must be re-set before restarting the system.
Off = OK
AMBER = Fire alarm activated.
Zones 1-2
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 if connected.
