Merlin CT1200S
User Guide
Rev: 03 05-23
5
3
Installation & Operation
3.1
System ON and OFF
➢
Turn the fans on.
➢
Turn the key switch to on position.
➢
To turn the system off, turn the key switch to off position.
3.2
Emergency Shut Off
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.
3.3
BMS Integration
The Merlin CT1200S can be integrated with a BMS to make or break a circuit on gas on/gas off,
(valve open or valve closed). This will tell the BMS whether or not the kitchen has use of the gas
supply.
3.4
Fire Alarm Integration
The Merlin CT1200S can be integrated with a fire alarm to close the gas supply automatically in
the event of a signal from the fire alarm panel.
The volt free fire alarm signal can be wired in series with any remote shut off buttons.
If there are no remote buttons installed wire this directly to the terminal marked [EM REM].
3.5
Ventilation Mode
There are two ventilation interlock operating modes.
Mode 1
- The panel is simply looking for a closed circuit from the air
pressure differential switch, once the panel has a closed signal, the gas
will come on. If the circuit is then opened the gas valve will close.
Mode 2
- The Panel needs to see a change in state of the pressure differential switch. Once the
switch has gone from open to closed, the gas will come on. If the switch is already closed
system will wait for the switch to open then close again before allowing the gas on. If the circuit
is then opened the gas valve will close.
OFF
MODE 1 (Default)
ON
MODE 2
