Installation & Operation Manual Merlin 2000S
2000S
IOM
Rev: 10 07-20
8
OPERATION
First Power Up
On connecting mains power, an LED on the front of the panel (S&S Logo) will illuminate red.
1.
Turn off all appliances
2.
Turn the Fans On.
3.
Turn the key switch to ON position. See LED indicators.
To turn the system off, turn the key switch to OFF position.
Emergency Shut Off Button
The emergency shut off button is located on the front of the panel.
There is also a facility for remote shut off buttons to be wired in series on the circuit board.
The emergency shut off button(s) will cut off the gas supply when activated.
To reinstate the system, the emergency shut off button(s) will need to be reset and the panel
restarted.
LED Indicators
Gas On
When the fans are running and the key switch is turned on, the Merlin 2000S will open the gas
valve and the Gas-On LED will illuminate.
ON = Gas On / OFF = Gas Off
Testing
This LED will illuminate for approximately 30 seconds when the panel is checking the integrity of
the gas installation upon start up.
ON = proving the gas line, do NOT operate any appliances during the testing period.
Test Fail
Under normal working conditions this LED is off.
When the panel detects a gas leak on start- up, the LED will illuminate and the gas valve will
remain closed.
OFF = OK / ON = gas proving test failed
Pressure Low
Under normal working conditions the LED is off.
The LED will illuminate when the incoming gas pressure drops below 12mbar for 10 seconds and
the gas valve will close.
OFF = OK / ON = gas supply pressure low.
Supply Fans
Under normal working the LED will illuminate.
If a supply fan fault is detected, the LED will flash.
ON = OK / *FLASHING = One of the supply fans is not running.
*IF SUPPLY AND/OR EXTRACT FANS LED FLASHES FOR MORE THAN 20 SECONDS, THE GAS WILL SHUT OFF.
