AGS Merlin 1000Si Guide

Merlin 1000Si Gas Utility Controller User & Installation Manual
Rev: 02 Date: 08-01-18 1
Gas Safety Products
Merlin 1000Si Gas Utility Controller
Installation, operating and maintenance

Merlin 1000Si Gas Utility Controller User & Installation Manual
Rev: 02 Date: 08-01-18 2
Table of contents
1General information ............................................................................3
2Installation ...........................................................................................3
2.1 Panel Mounting............................................................................................... 3
2.2 Power Supply.................................................................................................. 3
2.3 Gas solenoid valve.......................................................................................... 3
2.4 BMS Connections. .......................................................................................... 3
2.5 Timeout Facility............................................................................................... 3
2.6 Remote emergency shut off buttons............................................................... 3
2.7 Gas Detector................................................................................................... 3
2.8 FS 123............................................................................................................. 3
2.9 CO2 Monitor.................................................................................................... 3
2.10 12v DC............................................................................................................ 3
2.11 Internal Buzzer................................................................................................ 3
3Operation Instructions........................................................................4
3.1 How to turn the system on and off.................................................................. 4
3.2 Explanation of LED status............................................................................... 4
3.2.1 Power LED...................................................................................................... 4
3.2.2 Gas on LED..................................................................................................... 4
3.2.3 Timeout LED................................................................................................... 4
3.2.4 EM Stop LED .................................................................................................. 4
3.2.5 Gas Detected LED.......................................................................................... 4
3.2.6 CO2 High ........................................................................................................ 4
3.3 Using the emergency shut off......................................................................... 5
3.4 BMS integration .............................................................................................. 5
3.5 Fire alarm integration...................................................................................... 5
3.6 Fan switch integration..................................................................................... 5
3.7 Auto reset........................................................................................................ 5
1000Si Wiring Diagram...............................................................................6

Merlin 1000Si Gas Utility Controller User & Installation Manual
Rev: 02 Date: 08-01-18 3
1 General information
The Merlin 1000Si is a gas isolation & gas detection utility controller.
The Merlin 1000Si can receive connections from remote emergency shut-off buttons, gas detectors and
a CO2 monitor. It can also be integrated with a BMS and fire alarm.
It is recommended that the user reads this guide before using the system. Please do NOT attempt to
operate the unit until the contents of this document have been read and are thoroughly understood.
2 Installation
2.1 Panel Mounting The control panel is designed for surface mounting using 4 mounting screws.
Removing the cover on the panel gives access to the circuit board. The PCB should be removed before
drilling entry holes into the case.
2.2 Power Supply A 100-240VAC electrical supply should be supplied to the panel. This should be
externally fused at 3 Amps using a fused spur and should be connected to the terminals marked ”LNE
Power IN”
2.3 Gas solenoid valve The gas solenoid valve should be powered using the terminals on the
Merlin 1000Si marked “LNE to VALVE”.
2.4 BMS Connections Terminal connections are available on the circuit board for connections to
Building Management systems etc. Detailed on the circuit board as “BMS OUT N/C, COM and N/O”
these are volt free connections.
2.5 Timeout Facility The Merlin 1000Si has a built-in Auto-shut down feature and it will turn itself off
after predefined time. Auto-shut down timeout is selectable. There are two dip-switches located on the
inside facia of the Merlin 1000Si labelled “Time1” and “Time2”. They are factory set in the ‘off’ position
for a 2 hour timeout. On installation, they can be switched to the ‘on’ position to select required timeout.
Time1 Off, Time2 Off –2 hours
Time1 On, Time2 Off –4 hours
Time1 Off, Time2 On –8 hours
Time1 On, Time2 On –no timeout (auto-shut down disabled)
On Auto-shut down gas supply will be turned off.
2.6 Remote emergency shut off buttons The terminal for remote emergency shut-off buttons is
detailed on the circuit board as “EM Remote”. These connections are linked out as a factory setting.
Remote emergency shut-off buttons should be volt free and wired to the Merlin 1000Si using two-core
cable.
2.7 Gas Detector The terminals detailed on the circuit board as “Gas Detector”. These connections
are “+,-“ and ” ” these can be wired to a Merlin Natural gas, Carbon monoxide or LPG detector. If no
detector is being used leave the link in between the “ ”. Other detector types are available.
2.8 FS 123 This terminal switches when the key is turned on and off. This can be linked to a fan
switch (panel supplied separately) which can provide power to the fans when the control panel
is switched on.
2.9 CO2 Monitor This terminal can be wired to CO2 monitor to shut off the system in the event of
High CO2 levels. If no CO2 monitor is supplied leave the terminal link in.
2.10 12v DC This is a permanent 12v DC output when there is power at the panel.
2.11 Internal Buzzer Operates at 65dB measured 30cm from closed panel.
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.

Merlin 1000Si Gas Utility Controller User & Installation Manual
Rev: 02 Date: 08-01-18 4
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 AGS 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 1000Si, 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 gas valve will open and the green ‘Gas On’ LED will illuminate.
GREEN = Gas On
OFF = Gas Off
AMBER = Fault detected.
3.2.3 Timeout LED
Under normal working conditions this LED is off. This LED will illuminate AMBER when auto-shut down
has occurred.
OFF = OK
AMBER = auto-shut down
3.2.4 EM Stop LED
If an emergency shut off button (either remote or on the panel) is pressed, the LED will illuminate
AMBER and the gas will be turned off. The EM Stop button must be re-set before restarting the system.
OFF = OK
AMBER = EM Stop button pressed
3.2.5 Gas Detected 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.
3.2.6 CO2 High
Under normal working conditions this LED is off. If the concentration of CO2 in the air is at alarm
level (relevant detector required), the LED will show RED and the Gas valve will turn off.
OFF = OK
RED = the concentration of CO2 is at alarm level.

Merlin 1000Si Gas Utility Controller User & Installation Manual
Rev: 02 Date: 08-01-18 5
3.3 Using the 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 BMS Integration
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 Integration
The Merlin 1000Si 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 is no remote emergency stop buttons installed wire this directly to the terminal marked ‘EM
REMOTE’.
3.6 Fan Switch Integration
There is the facility to connect a Fan Switch (FS1 or FS2 sold separately).
The Fan Switch provides the facility to turn on the fan(s) when the key switch on the Merlin 1000Si is in
the on position and turn the power off to the fan(s) when the key switch on the Merlin 1000Si is in the off
position.
There is a dip-switch located inside the facia of the Merlin 1000Si labelled EM Selection. This is factory
set in the ‘off’ position which instructs the system to shut down the fan(s) and gas supply on activation of
the emergency shut off button(s). On installation, this can be switched to the ‘on’ position if required.
This will instruct the system to leave the fans on and only shut off the gas supply on activation of the
emergency shut off button(s). Note: This option is not available if Fan Switch is not installed.
3.7 Auto Reset
The Merlin 1000Si has a built-in auto reset feature. There is a dip-switch located on the inside facia of
the Merlin 1000Si labelled “Auto Reset”. This is factory set in the ‘off’ position. When the power is
restored after the power cut, the panel has to be restarted manually. On installation, this can be
switched to the ‘on’ position if required. This will instruct the system to restart automatically when power
is restored after the power cut.

Merlin 1000Si Gas Utility Controller User & Installation Manual
Rev: 02 Date: 08-01-18 6
1000Si Wiring Diagram
1. Mains Input 100-240VAC Single Phase.
2. Gas Solenoid Valve Power Output, 100-240VAC, Max 3A.
3. Electric Contactor, this is disabled on this system.
4. Water Valve, this is disabled on this system.
5. Supply Fan PD Switches terminal, this is disabled on this system.
6. Extract Fan PD Switches terminal, this is disabled on this system.
7. BMS output contacts. Normally Closed, Common and Normally Open. Max.1A @ 100-240VAC.
8. Gas pressure transducer, this is disabled on this system.
9. Remote EM Stop buttons and Fire Alarm input wired in series (purchased separately). VOLT
FREE INPUT
10. Methane, CO or LPG Detector, power supply and volt free input (purchased separately).
11. Fan Switch output (purchased separately). For wiring instruction see Fan Switch user manual.
12. CO2 Monitor (purchased separately). VOLT FREE INPUT
13. Permanent 12VDC output when there is power at the panel. 50mA max
Please note, Mains wires and low voltage wires should
not be run in the same conduit as per the
LOW VOLTAGE DIRECTIVE
1
2
L
N
E
Gas Valve
EM
Stop
CO2
Monitor
Gas
Detector
5 6 7 8 9 10 11 12 13
3
4
L
N
E

Merlin 1000Si Gas Utility Controller User & Installation Manual
Rev: 02 Date: 08-01-18 7
INFORMATION ON WASTE DISPOSAL FOR CONSUMERS OF ELECTRICAL & ELECTRONIC EQUIPMENT
When this product has reached the end of its life it must be treated as Waste Electrical & Electronics Equipment (WEEE). Any
WEEE marked products must not be mixed with general household waste, but kept separate for the treatment, recovery and
recycling of the materials used. Please contact your supplier or local authority for details of recycling schemes in your area.
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