Merlin CT1650+ User Guide
Rev: 05 05-19 6
3.3 BMS Integration
The Merlin CT1650+ 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.
This can be adjusted using the switch [BMS SEL] located on the PCB board of
the front fascia to switch the BMS on gas detection or emergency stop.
3.4 Fire Alarm Integration
The Merlin CT1650+ can be integrated with a fire alarm to close the gas supply
automatically in the event of a fire.
The volt free fire alarm signal can be wired in series with any remote emergency shut off
buttons. If there are no remote emergency stop buttons installed wire this directly to the
terminal marked [EM REM STOP].
3.5 Mute Button
Under normal working conditions the panel will activate the sounder alarm in the event of a
fault being present. To mute the sounder alarms press the button on the front panel.
3.6 How to setup the current monitors
Setting the minimum & maximum fan current.
Turn Fan 1 (F1) switch to ON position.
The LCD screen will show Fan 1 current.
! - means Fan1 has not yet been calibrated.
Set Fan 1 minimum operating current.
Press and hold the F1 LOW button.
LCD screen will display: F1 LOW SAVED.
Set Fan 1 maximum operating current.
Press and hold the F1 HIGH button.
LCD screen will display: F1 HIGH SAVED.
Please repeat steps to set min & max current of Fan 2.
IF YOU ARE ONLY INTERLOCKING WITH ONE FAN, PLEASE LEAVE THE REMAINING [F] SWITCH
TO THE ‘1’ or ‘OFF’ POSITION TO PREVENT NUISANCE TRIPPING.
If the measured current falls below or rises above 10% of the permitted current, the LCD display
will show a ‘LOW!‘ or ‘HIGH!’ message next to the relevant fan and the gas solenoid valve
connected will be isolated. To adjust this threshold –see following section.
To erase the calibration data press and hold the relevant [RESET] button until ‘!’ appears.
