AGS Merlin 1000S User manual

Installation & Operation Manual Merlin 1000S
1000S IOM Rev: 07 01-20 1
Merlin 1000S
Gas Utility Isolation Controller

Installation & Operation Manual
Please read this manual carefully and retain for future use.
The Merlin 1000S gas pressure proving and detection system is designed specifically for use in
educational establishments and laboratories. The system is designed to give full control over
incoming gas supply with the lockable main key-switch and touch sensors.

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Contents
INSTALLATION ...........................................................................................3
Planning........................................................................................................................... 3
Fixing - Mounting............................................................................................................ 3
Typical Installation Arrangement ............................................................................... 4
Terminal Connections................................................................................................... 4
Switch Settings................................................................................................................ 7
Specification .................................................................................................................. 9
OPERATION ..............................................................................................10
First Power Up ............................................................................................................... 10
Emergency Shut Off Button ....................................................................................... 10
LED Indicators............................................................................................................... 10
Servicing & General Maintenance .......................................................................... 12
Bump Testing ................................................................................................................ 12
IMPORTANT WARNING STATEMENTS ...................................................13
Manufacturer’s Warranty........................................................................................... 13
Installation Details........................................................................................................ 16

Installation & Operation Manual Merlin 1000S
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INSTALLATION
Planning
The Merlin 1000S gas pressure proving and detection system is designed specifically for use in
educational establishments and laboratories.
This panel is to be used to carry out a gas proving test on the pipe work in order to highlight if
there is a gas appliance open or a gas leak in a laboratory or similar environment.
The Merlin 1000S is designed to give the teacher full control over the incoming gas supply with
the lockable main key-switch and touch sensors.
The Merlin 1000S can work in conjunction with carbon dioxide, natural gas, carbon monoxide
and LPG sensors. The Merlin 1000S also has a built in “timeout” facility which will automatically
shut off the gas solenoid valve at the end of a specific time period, this time period can be
adjusted to 2, 5, 8 hours or can be overridden if required.
Placing the panel at eye level allows for optimum monitoring of LED Indicators.
Fixing - Mounting
Unpack all the parts!
1. Carefully remove the front cover from the unit by unscrewing the four bolts located at each
corner. To do this –use the socket wrench provided.
2. Mark the four screw holes located on the back of the enclosure to the wall. Ensure the wall
surface is flat to prevent base distortion.
3. After executing the mounting and the connections –replace the front cover and insert the
security caps over the four bolts.
A flush mount kit is available, comprising of a mounting bracket and decorative surround strip.
Contact your supplier for more information.
Please refer to your detector manual for important information regarding coverage,
location and positioning including areas and conditions to avoid.
Be careful when creating access for cables –Damage to boards will void any warranty.
Carefully remove the circuit board before drilling cable entry holes.

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Typical Installation Arrangement
Terminal Connections
1. POWER / LINE IN
110-120V AC Power should be supplied to the [POWER / LINE IN] terminal and fused at 3A.
On connecting the mains supply to the panel the power LED indicator will light up –this is
located on the front cover (American Gas Safety Logo).
2. GAS SOLENOID VALVE OUTPUT
100-120V AC electrical power supplied from the [VALVE OUT] connector using a 3 core cable
can be connected to a gas solenoid valve which can shut the gas supply on alarm status.
Pressure sensors should be screwed to the downstream port of the valve.
Refer to your valve manual for more information and wiring!

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3. BMS OUTPUT
Connections are available on the board for Building Management Systems.
[NO Normally Open] [COM Common] [NC Normally Closed]
These are volt free connections.
This is a relay that changes state in alarm or when the gas is on/off and can be used in
conjunction with the 12V DC output and other external relays that affect other devices and
controls such as purge fans and audible alarms etc.
See section; Switch Settings - for BMS options
4. PRESSURE SENSOR
The pressure sensor is wired to the [PRESSURE SENSOR] connector and screwed into the
downstream port of the gas solenoid valve.
Connect the pressure sensor as shown:
Red [+] Black [-] Blue [IN]
The sensor will monitor the gas supply pressure and if pressure drops below 0.17psi –
the gas valve will close as this could mean a gas leak is present.
The pressure sensor operating pressure is: 0 –1.45psi.
5. EM REMOTE
Connections for remote emergency shut-off or stop buttons is detailed on the circuit board as
[EM REMOTE]. This is linked out as a factory setting.
Remote emergency shut-off buttons should be volt free and wired to the Merlin 1000S using a
plenum security cable, white, 18/2 (18AWG 2 conductor), stranded, CMP or similar.
6. GAS DETECTOR
Connections can be made for a Merlin gas detector (LPG, NG, CO or Hydrogen).
If no detector is being used leave the factory fitted link in.
A wiring example is shown.
Refer to your gas detector manual for further information.
Screw the pressure sensor into the downstream port of your gas solenoid valve.

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7. FAN SWITCHES
This terminal switches when the key is turned on and off.
This can be connected to a fan switch (supplied separately) which can provide power to fans
when the control panel is switched on.
8. CO2 MONITOR
This terminal can be used to connect a Merlin CO2monitor to shut off the system in the event of
a high concentration of CO2.
If no CO2 monitor is connected, the panel will ‘beep’ upon power up and the CO2 LED will
flash 3 times to indicate that this terminal has been disabled.
An external power supply is required.
Refer to your CO2monitor manual for further information.
9. 12V DC
This is a power output for external auxiliary devices when there is power at the panel and can
be used to create a relay switch with the BMS relay output.
Max output: 50mA

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Switch Settings
There are various dip-switches on the front circuit board that can be adjusted to configure your
system as per the following.
Auto Reset
There is a switch located on the circuit board labelled [AUTO RESET].
OFF
When power is restored after the power cut/ loss, the panel has to be
restarted manually. (Default)
ON
This will instruct the system to restart automatically when power is
restored after power cut/loss.
Building Management System Integration
There is a dip-switch located on the circuit board labelled [BMS SEL].
The panel can be integrated with a BMS to make or break a circuit when the gas is either on or
off, (valve open or valve closed). This will tell the BMS whether or not power is being
sent to the solenoid valve.
OFF
Signals the BMS when gas is on or gas is off. (Default)
ON
Signals the BMS on a fault, i.e. high gas levels detected, emergency
shut-off activated, etc.
Fan Switch Integration
There is the facility to connect a Fan Switch.
A fan switch (Merlin FS1 or FS2 - sold separately) provides the facility to turn on fan(s) when the
1000S panel is switched on and removes power to fan(s) when the switched off.
There is a switch located on the circuit board labelled [EM SEL].
OFF
Instructs the system to shut down fan(s) and gas supply upon
activation of emergency shut off button(s). (Default)
ON
Instructs the system to leave the fans on and shut off the gas supply
only upon activation of emergency shut off button(s).
Note: This option is not available if a Fan Switch is not installed.

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Gas Fill Time and Prove Time
FILL TIME: Amount of time the gas valve opens to fill the gas line on power up or reset.
PROVE TIME: Amount of time the system tests the gas line for leaks on power up or reset.
There are two switches located on the circuit board labelled [FILL TIME] and [PROVE TIME].
FILL TIME
PROVE TIME
OFF
5 Seconds (Default)
OFF
30 Seconds (Default)
ON
10 Seconds
ON
50 Seconds
Once the settings have been changed - remove power for 10 seconds.
Fire Panel Integration
The Merlin 1000S 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 shut off buttons being installed, wire this directly to the
terminal marked [EM REMOTE].
Auto Shut-Down - Timeout Period
The system has an auto-shut down feature after a selected time.
There are two switches located on the circuit board labelled [TIME1] & [TIME2].
These can be configured to select the required timeout/ shut-down period.
TIME 1
TIME 2
Timeout Period
OFF
OFF
2 Hours (Default)
ON
OFF
4 Hours
OFF
ON
8 Hours
ON
ON
Disabled
Note: Upon timeout the gas supply will be turned off unless other utilities are configured.

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Specification
Model:
1000S
Visual Indication
LED
Mains Electrical Power Input
100-120VAC
Gas Solenoid Valve Output
100-120VAC
Current Consumption
12W max or 50mA @ 120VAC
Internal Fuse
3.15A
Operating Temperature
32 –104°F 0-95%RH Non-Condensing
Audible Alarm Buzzer dB
65 dB (300mm distance in quiet conditions)
Pressure Sensor Operating Pressure
0 -1.45psi
Internet connection
N/A
Housing Material
Polylac PA-765
Flame Rating
UL 94
Approvals
CE, RoHS
O/All Dimensions (H x W x D) mm / inch
7.08 x 10 x 3.03”

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OPERATION
First Power Up
On connecting mains power, an LED on the front of the panel (AGS Logo) will illuminate red.
Turn the key switch to on position.
Turn the key switch to the off position to turn the panel off.
Emergency Shut Off Button
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 on the circuit board.
The emergency shut off button(s) will cut off the gas supply and electrics only when activated.
To reinstate the system, the emergency shut off button(s) will need to be reset and the panel
restarted.
LED Indicators
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.
ON = 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.
ON = proving the gas line, do NOT operate any appliances.