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Merlin 1000Si

Gas Utility Controller



EM STOP

If an emergency shut off button (either remote or on the panel) is pressed, the LED will

illuminate and the gas will be shut off. The EM Stop button must be re-set before restarting the

system.

OFF = OK

AMBER = EM Stop button pressed



GAS DETECTED

Under normal working conditions this LED is off.

If the external Merlin detector connected detects gas this will illuminate and the gas valve will

shut off.

OFF = OK

RED = Gas detected.



CO2 HIGH

Under normal working conditions this LED is off.

If the concentration of CO

will illuminate and the gas valve will shut off.

OFF = OK

RED = the concentration of CO

3.3

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.

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.

3.4

BUILDING MANAGEMENT SYSTEM INTERGRATION

The Merlin 1000Si 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 power is being sent to the

solenoid.

There is a dip-switch located on the inside facia of the Merlin 1000Si labelled [BMS SELECTION].

This is factory set in the 'off' position which signals the BMS on gas on/gas off.

When switched to the 'on' position, the 1000Si will only signal the BMS on a fault, i.e. CO2 high

level detected, gas detected, EM Stop pressed, etc.

3.5

FIRE ALARM INTERGRATION

The Merlin 1000Si can be integrated with a fire alarm to shut 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.

Rev: 04 Date: 22-10-18

in the air is at alarm level (relevant detector required), the LED

is at alarm level.

User & Installation Manual