AGS Merlin 1000S Technical Document

Merlin 1000S Gas Utility Controller User & Installation Manual
Rev: 05 Date: 29-10-18 1
Gas Safety Products
Merlin 1000S Gas Utility Controller
Installation, Operation and Maintenance
Read these instructions carefully before operating or servicing

Merlin 1000S Gas Utility Controller User & Installation Manual
Rev: 05 Date: 29-10-18 2
Table of contents
1GENERAL INFORMATION ...................................................................................3
2INSTALLATION & CONNECTION......................................................................3
2.1 Panel Mounting.............................................................................................................3
2.2 1000S Circuit Board Terminals......................................................................................3
2.3 POWER [1]......................................................................................................................4
2.4 GAS VALVE [2]...............................................................................................................4
2.5 BMS OUT [3] ...................................................................................................................4
2.6 PRESSURE SENSOR [4]....................................................................................................4
2.7 EM REMOTE [5] ..............................................................................................................4
2.8 GAS DETECTOR [6] ........................................................................................................4
2.9 FS 1/2/3/4 [7] .................................................................................................................5
2.10 CO2 MONITOR [8].........................................................................................................5
2.11 12VDC [9].......................................................................................................................5
2.12 INTERNAL BUZZER ...........................................................................................................5
2.13 PANEL TIMEOUT FACILITY ..............................................................................................5
3OPERATION ........................................................................................................5
3.1 SYSTEM ON & OFF .........................................................................................................5
3.2 LED STATUS .....................................................................................................................6
POWER ...............................................................................................................................6
GAS ON..............................................................................................................................6
TESTING...............................................................................................................................6
TEST FAIL .............................................................................................................................6
PRESSURE LOW...................................................................................................................6
TIMEOUT..............................................................................................................................6
EM STOP .............................................................................................................................6
GAS DETECTED ..................................................................................................................7
CO2 HIGH ..........................................................................................................................7
3.3 EMERGENCY SHUT OFF .................................................................................................7
3.4 BMS INTERGRATION.......................................................................................................7
3.5 FIRE ALARM INTERGRATION..........................................................................................7
3.6 FAN SWITCH INTERGRATION.........................................................................................8
3.7 GAS FILL & PROVE TIME ................................................................................................8
3.8 AUTO RESET ....................................................................................................................8
1000S WIRING ............................................................................................................................9

Merlin 1000S Gas Utility Controller User & Installation Manual
Rev: 05 Date: 29-10-18 3
1GENERAL INFORMATION
The Merlin 1000S is a gas shut off & gas detection utility controller.
The system comprises of a control panel and a gas pressure sensor. The Merlin 1000S 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.
2INSTALLATION & 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 1000S Circuit Board Terminals

Merlin 1000S Gas Utility Controller User & Installation Manual
Rev: 05 Date: 29-10-18 4
2.3 POWER [1]
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]
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]
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 PRESSURE SENSOR [4]
The terminals marked [PRESSURE SENSOR] [+ - IN] are wired to the gas pressure transducer
which is screwed into the downstream port on the gas solenoid valve (see transducer
datasheet for more information.).
Operating Pressure = 0.17psi min - 1.45psi max
2.7 EM REMOTE [5]
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.
2.8 GAS DETECTOR [6]
These terminals are marked [+ -] and [ ] and should be volt free dry contact connections.
These can be wired to various Merlin gas detectors.
If no detector is being used, leave the terminal link in place.
For more information / multiple detector wiring, consult the gas detector manual.

Merlin 1000S Gas Utility Controller User & Installation Manual
Rev: 05 Date: 29-10-18 5
2.9 FS 1/2/3/4 [7]
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.
2.10 CO2 MONITOR [8]
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 [ ].
For more information, consult the CO2 Monitor manual.
2.11 12VDC [9]
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.
2.12 INTERNAL BUZZER
Operates at 65dB measured 30cm from closed panel.
2.13 PANEL TIMEOUT FACILITY
The Merlin 1000S 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 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)
3OPERATION
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.

Merlin 1000S Gas Utility Controller User & Installation Manual
Rev: 05 Date: 29-10-18 6
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 1000S, a loose wire/ribbon connection or the fuse may not be intact.
GAS ON
When the key switch is turned on, the Merlin 1000S will check the installation for gas leaks.
If gas proving is successful, the gas valve will open and the GAS ON LED will illuminate.
GREEN = Gas On
OFF = Gas Off
TESTING
This LED will illuminate GREEN for approximately 30 seconds when the panel is checking the
integrity of the gas installation upon start up.
GREEN = proving the gas line, do NOT operate any appliances.
TEST FAIL
Under normal working conditions this LED is off.
When the panel detects a gas leak on start-up, the LED will illuminate and the gas valve will
remain closed.
OFF = OK
AMBER = Gas proving failed
PRESSURE LOW
Under normal working conditions the LED is off.
The LED will illuminate when the pressure of gas supply drops below 0.17psi for 10 seconds and
the gas valve will close.
OFF = OK
AMBER = Gas supply pressure low.
TIMEOUT
Under normal working conditions this LED is off. This LED will illuminate upon auto-shut down
OFF = OK
AMBER = auto-shut down
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

Merlin 1000S Gas Utility Controller User & Installation Manual
Rev: 05 Date: 29-10-18 7
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 BMS INTERGRATION
The Merlin 1000S 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 1000S 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 1000S 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 1000S 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.
If there are no remote emergency stop buttons installed, wire this directly to the terminal
marked [EM REMOTE].

Merlin 1000S Gas Utility Controller User & Installation Manual
Rev: 05 Date: 29-10-18 8
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 1000S 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 GAS FILL & PROVE TIME
Gas fill and prove times are adjustable.
There are two dip-switches located on the inside facia of the Merlin 1000S labelled [FILL TIME]
and [PROVE TIME].
They are factory set in the OFF position.
Fill and prove time can be changed by switching the relevant dip switch as follows;
[FILL TIME] Switch:
Off –5 seconds
On –10 seconds
[PROVE TIME] Switch:
Off –30 seconds
On –50 seconds
Once selected - please remove power from the fuse spur for 10 seconds.
3.8 AUTO RESET
The Merlin 1000S has a built-in auto reset feature. There is a dip-switch located on the inside
facia of the Merlin 1000S 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 1000S Gas Utility Controller User & Installation Manual
Rev: 05 Date: 29-10-18 9
1000S WIRING
1) [POWER] Mains Input 110-120VAC Single Phase.
2) [GAS VALVE] Gas Solenoid Valve Power Output, 110-120VAC, Max 3A.
3) [BMS OUT] Building Management System output contacts.
Normally Closed, Common and Normally Open. Max.1A @ 110-120VAC.
4) [PRESSURE SENSOR] Gas pressure transducer, power supply and returned signal (supplied).
5) [EM REMOTE] Remote EM Stop buttons and Fire Alarm input wired in series VOLT FREE
(Purchased separately).
6) [GAS DETECTOR] Methane, CO or LPG Detector, power supply and VOLT FREE
(Purchased separately).
7) [FS1/2/3/4] Fan Switch output (purchased separately).
For wiring instruction see Fan Switch user manual.
8) [CO2 MONITOR] CO2 Monitor (purchased separately). VOLT FREE
9) [12VDC] Permanent 12VDC output when there is power at the panel. 50mA max
Panel Net Weight: 1161g
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 1000S Gas Utility Controller User & Installation Manual
Rev: 05 Date: 29-10-18 10
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
Tel: [phone]
Fax: [phone]
[e-mail]
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