Merlin 1000BH Gas Proving/Gas Detection System
Product Data Sheet
S&S Northern Ltd
4
Note: all low voltage connections should be made using a screened cable. To
avoid electrical interference this should not be in the same conduit as mains
cable as per the low voltage directive.
3
Operation Instructions
3.1
How to turn the system on and off
1. Turn the key switch to on position.
2. To turn the system off, turn the key switch to off position.
3.2
Explanation of LED status
3.2.1
Power LED
When the system is connected to the mains supply, the Red LED of the S&S Logo located in
the bottom right corner of the panel will illuminate. When no power is present, this LED will not
light up.
RED = OK
OFF = No power to 1000BH, a loose ribbon connection or the fuse may not be intact.
3.2.2
Gas on LED
When the key switch is turned on, the Merlin 1000BH will check the installation for gas leaks. If
gas proving is successful, the gas valve will
open and the green ‘Gas On’ LED will illuminate.
GREEN = Gas On
OFF = Gas Off
3.2.3
Testing LED
This LED will illuminate GREEN for approximately 30 seconds when the panel is checking the
integrity of the gas installation upon start up. GREEN = proving the gas line, do NOT operate
any appliances
3.2.4
Test Fail LED
Under normal working conditions this LED is off. When the panel detects a gas leak on start-
up, the LED will illuminate AMBER. Gas valve will remain closed.
OFF = OK
AMBER = gas proving failed
3.2.5
Pressure Low LED
Under normal working conditions the LED is off. The LED will illuminate AMBER when
pressure of the gas supply drops below 12mBar for 10 secs. The gas valve will close.
OFF = OK
AMBER = gas supply pressure low.
3.2.6
Gas Detector 1/ Gas Detector 2 LED
Under normal working conditions this LED is off. If the external Merlin detector connected
detects gas this will show RED and the Gas valve will turn off.
OFF = OK
RED = Gas detected.
3.2.7
Heat Detector LED
Under normal working conditions this LED is off. If the temperature of the boilers reaches 72
Degrees Celsius or higher (Heat detector required), the LED will show AMBER and the Gas
valve will turn off.
OFF = OK
AMBER = High temperature detected (72 Degrees Celsius or higher)
