AGS Merlin 1000Si Guide

Merlin 1000Si Gas Utility Controller User & Installation Manual
Rev: 04 Date: 22-10-18 1
Gas Safety Products
Merlin 1000Si Gas Utility Controller
Installation, operating and maintenance
Read these instructions carefully before operating or servicing

Merlin 1000Si Gas Utility Controller User & Installation Manual
Rev: 04 Date: 22-10-18 2
Table of contents
1GENERAL INFORMATION ...................................................................................3
2INSTALLATION & CONNECTION.........................................................................3
2.1Panel Mounting.............................................................................................................3
2.2 1000Si Circuit Board Terminals .....................................................................................3
2.3 POWER [1]......................................................................................................................4
2.4 GAS VALVE [2]...............................................................................................................4
2.5 BMS OUT [3] ...................................................................................................................4
2.6 EM REMOTE [4] ..............................................................................................................4
2.7 GAS DETECTOR [5] ........................................................................................................4
2.8 FS1/2/3/4 [6] ..................................................................................................................4
2.9 CO2 MONITOR [7].........................................................................................................4
2.10 12VDC [8].......................................................................................................................4
2.11 INTERNAL BUZZER ...........................................................................................................5
2.12 PANEL TIMEOUT FACILITY ..............................................................................................5
3OPERATION ........................................................................................................5
3.1 SYSTEM ON & OFF .........................................................................................................5
3.2 LED STATUS .....................................................................................................................5
POWER ...............................................................................................................................5
GAS ON..............................................................................................................................5
TIMEOUT..............................................................................................................................5
EM STOP .............................................................................................................................6
GAS DETECTED ..................................................................................................................6
CO2 HIGH ..........................................................................................................................6
3.3 EMERGENCY SHUT OFF .................................................................................................6
3.4 BUILDING MANAGEMENT SYSTEM INTERGRATION .....................................................6
3.5 FIRE ALARM INTERGRATION..........................................................................................6
3.6 FAN SWITCH INTERGRATION.........................................................................................7
3.7 AUTO-RESET....................................................................................................................7
1000Si WIRING...........................................................................................................8

Merlin 1000Si Gas Utility Controller User & Installation Manual
Rev: 04 Date: 22-10-18 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 & CONNECTION
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.
A flush mount kit is available, comprising of a mounting bracket and decorative surround strip.
Contact your supplier for more information.
2.2 1000Si Circuit Board Terminals

Merlin 1000Si Gas Utility Controller User & Installation Manual
Rev: 04 Date: 22-10-18 4
2.3 POWER [1]
Mains Power Supply
A 110-120VAC Single Phase electrical supply should be supplied to the panel.
This should be externally fused at 3 Amps using a fused or circuit breaker.
2.4 GAS VALVE [2]
Gas Solenoid Valve Power Output
This outlet provides a 110-120VAC 3 amp signal to the solenoid valve. Please consult the
solenoid valve installation instructions for further information.
2.5 BMS OUT [3]
Building Management System Connections
Terminal connections are available on the circuit board for connections to Building
Management systems. [NC –Normally Closed] [COM - Common] [NO –Normally Open].
These are volt free dry contact connections.
This is a relay that changes state in alarm or when gas is on/off and can be used in conjunction
with the 12VDC output and other external relays that affect other devices and controls such as
purge fans, audible alarms etc.
2.6 EM REMOTE [4]
Remote Emergency Shut Off Buttons
These connections are linked out as a factory setting.
Remote emergency shut-off buttons should be volt free and wired to the Merlin panel using a
Plenum Security Cable. White, 18/2 (18AWG 2 Conductor), stranded, CMP or similar.
2.7 GAS DETECTOR [5]
Gas Detectors
These terminals are [+ -] and [ ] and should be volt free dry contact connections.
These can be wired to various Merlin gas detectors.
For multiple detector wiring consult the gas detector manual.
2.8 FS1/2/3/4 [6]
Fan Switch Output
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 fans when the control panel is
switched on.
2.9 CO2 MONITOR [7]
CO2Monitor
This terminal can be wired to CO2monitor to shut off the system in the event of High CO2 levels.
If no CO2monitor is supplied leave the terminal link in [ ].
2.10 12VDC [8]
12V DC Output
This is a permanent 12v DC output when there is power at the panel and can be used to
create a relay switch with the BMS relay output. Please contact your supplier for further
information.

Merlin 1000Si Gas Utility Controller User & Installation Manual
Rev: 04 Date: 22-10-18 5
2.11 INTERNAL BUZZER
Operates at 65dB measured 30cm from closed panel.
2.12 PANEL TIMEOUT FACILITY
The Merlin 1000Si has a built-in Auto-shut down feature and it will turn itself off after a
predefined time. Auto-shut down timeout is selectable.
There are two Dip-Switches located on the inside facia of the system labelled [Time1] and
[Time2]. The gas supply will be cut off at desired time-out.
To select required timeout –configure Dip Switches as follows;
2 HOURS (FACTORY SET)
Time1 Off / Time2 Off
4 HOURS
Time1 On / Time2 Off
8 HOURS
Time1 Off / Time2 On
NO TIMEOUT
Time1 On / Time2 On (auto-shut down disabled)
3 OPERATION
3.1 SYSTEM ON & OFF
1) Turn off all open appliances.
2) Turn the key switch to on position.
3) To turn the system off, turn the key switch to off position.
3.2 LED STATUS
POWER
When the system is connected to 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 wire/ribbon connection or the fuse may not be intact.
GAS ON
When the key switch is turned on, the gas valve will open and the GAS ON LED will illuminate.
GREEN = Gas On
OFF = Gas Off
TIMEOUT
Under normal working conditions this LED is off. This LED will illuminate upon auto-shut down
OFF = OK
AMBER = auto-shut down

Merlin 1000Si Gas Utility Controller User & Installation Manual
Rev: 04 Date: 22-10-18 6
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 CO2in the air is at alarm level (relevant detector required), the LED
will illuminate and the gas valve will shut off.
OFF = OK
RED = the concentration of CO2is at alarm level.
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.

Merlin 1000Si Gas Utility Controller User & Installation Manual
Rev: 04 Date: 22-10-18 7
If there are no remote emergency stop buttons installed, wire this directly to the terminal
marked [EM REMOTE].
3.6 FAN SWITCH INTERGRATION
There is the facility to connect a Fan Switch (FS1 or FS2 sold separately).
The Fan Switch provides the facility to turn the fan(s) ON when the Merlin panel is on and turn
the fans OFF when the panel is switched off
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, this will instruct the system to leave
the fans on and only shut off the gas supply on activation of an Emergency shut off button.
Note: This option is not available if a 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, this means, if you experience a power cut, the panel has
to be restarted manually.
This can be switched to the ‘ON’ position and will instruct the system to restart automatically
when power is restored following a power cut or similar situation.

Merlin 1000Si Gas Utility Controller User & Installation Manual
Rev: 04 Date: 22-10-18 8
1000Si WIRING
1) [LNE POWER] Input 110-120VAC Single Phase.
2) [LNE GAS VALVE] Output 110-120VAC, Max 3A.
3) [BMS OUT] Max.1A @ 110-120VAC.
4) [EM REMOTE] Remote EM Stop buttons and Fire Alarm input wired in series (sold separately).
5) [GAS DETECTOR] Methane, CO or LPG Detector power supply (detector sold separately).
See detector manual for more information
6) [FS1/2/3/4] Fan Switch output (sold separately).
7) [CO2 MONITOR] CO2 Monitor (sold separately).
8) [12VDC] Permanent 12VDC output when there is power at the panel. 50mA Max
Panel Net Weight: 1153g
Panel Dimensions: (W) 10” x (L) 7” x (D) 2.4”
PLEASE NOTE:
MAINS AND LOW WIRING SHOULD NOT RUN IN THE SAME CONDUIT AS PER THE LOW VOLTAGE DIRECTIVE

Merlin 1000Si Gas Utility Controller User & Installation Manual
Rev: 04 Date: 22-10-18 9
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.
CONTACT US:
AGS Head Office
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Fax: [phone]
[e-mail]
American Gas Safety is the owner of this document and reserves all rights of modification without prior notice.