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.

Installation & Operation Manual Merlin 1000S 
 
 1000S IOM Rev: 07 01-20 2 
 
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

1000S IOM Rev: 07 01-20 3

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)

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)

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)

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)

10 Seconds

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

2 Hours (Default)

OFF

4 Hours

OFF

8 Hours

Disabled

Note: Upon timeout the gas supply will be turned off unless other utilities are configured.

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1000S IOM Rev: 07 01-20 9

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”

Installation & Operation Manual Merlin 1000S

1000S IOM Rev: 07 01-20 10

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.

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