AGS Merlin GDP2X User manual

Installation & Operation Manual Merlin GDP2X
AGSGDP2X - IOM Iss: 3 03-20 1
Merlin Gas Detection Panel: GDP2-X

Installation & Operation Manual
Please read this manual carefully and retain for future use.
American Gas Safety provide a range of detection panels which can be used in many applications such
as factories, car parks, shopping malls and most commonly for this model - boiler houses.
The GDP2X can be used with up to eight Merlin gas detectors (sold separately) for monitoring and
detecting gas including carbon monoxide, liquid petroleum gas and methane.

Installation & Operation Manual Merlin GDP2X
AGSGDP2X - IOM Iss: 3 03-20 2
CONTENTS
INSTALLATION..............................................................................................3
Planning ............................................................................................................................. 3
Quick Installation Arrangement .................................................................................... 3
Fixing ................................................................................................................................... 4
Board Overview - Main ................................................................................................... 4
Wiring the GDP2X ............................................................................................................. 5
Settings Switch .................................................................................................................. 8
Settings Menu ................................................................................................................... 9
Settings Options Explained ............................................................................................. 9
Factory Set Condition ..................................................................................................... 9
Trouble Shooting............................................................................................................... 9
Specification ................................................................................................................... 10
OPERATION.................................................................................................11
First Power Up .................................................................................................................. 11
Main Screen .................................................................................................................... 11
Zone Screens................................................................................................................... 11
Alarm Messages ............................................................................................................. 12
Alarm Message List ........................................................................................................ 12
Servicing & General Maintenance............................................................................. 13
Bump Testing ................................................................................................................... 14
IMPORTANT WARNING STATEMENTS......................................................15
Manufacturer’s Warranty ............................................................................................. 15
Installation Details .......................................................................................................... 16

Installation & Operation Manual Merlin GDP2X
AGSGDP2X - IOM Iss: 3 03-20 3
INSTALLATION
Planning
The Merlin GDP2X is a two zone gas detection panel which can be used in many applications
such as factories, car parks, shopping malls and most commonly - boiler houses.
It can be used with up to eight Merlin gas detectors (model X) for monitoring and detecting gas
including carbon monoxide, liquid petroleum gas and methane.
The GDP2X system can be integrated with, but not limited to, a BMS (building management
system) a fire panel, external alarms and remote emergency shut-off buttons.
Locations for detectors will vary based on the intended application and target gas, they should
be located near identified sources of a potential gas leaks/ pockets where hazardous gas could
quickly accumulate and areas of identified consequential risk.
The composition of the target gas and its density relative to air are used as the basis for any
recommended height of sensors.
Generally, the installation height of a sensor for a heavy gas (such as propane) would be close
to the lowest point in the area, and for a light gas (such as methane) would be close to the
highest point in the area.
Any recommended heights may vary based on air flow and temperature conditions in addition
to the proposed application and location –this is particularly apparent with oxygen depletion
sensors, and the target gas that they are used for.
Quick Installation Arrangement
Placing the GDP2X at eye level allows for optimum monitoring of the display screen.
Please refer to your detector manual for important information regarding coverage, location
and positioning including areas and conditions to avoid.
For applications where gas monitoring may exceed 100 yards from one control panel –
Contact your supplier.

Installation & Operation Manual Merlin GDP2X
AGSGDP2X - IOM Iss: 3 03-20 4
Fixing
Unpack all the parts!
1. Carefully remove the front cover and board 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.
Board Overview - Main
Be careful when creating access for cables –Damage to boards will void any warranty.
To avoid electrical shock you must
always isolate the mains supply before
opening the GDP2X panel cover/s.

Installation & Operation Manual Merlin GDP2X
AGSGDP2X - IOM Iss: 3 03-20 5
Wiring the GDP2X
MAINS POWER CONNECTION
100-120V AC mains power should be supplied to the [POWER/LINE IN] connector using a 3 core
cable 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 (red dot on the AGS Logo).
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.
Refer to your valve manual for more information and wiring!
GAS DETECTORS
A 12-24V power and data supply to gas detectors are wired to [DETECTOR CHAIN] connectors.
Always power down the panel when
wiring external circuits to prevent
damage to electronics.
Mains supply must be connected by a
competent person and according to
any regulations.

Installation & Operation Manual Merlin GDP2X
AGSGDP2X - IOM Iss: 3 03-20 6
12-24V power and data supply from your GDP2X [DETECTOR CHAIN] to [DETECTOR X CHAIN] can
be wired in any configuration. i.e. [IN/IN] [OUT/OUT] [IN/OUT] [OUT/IN] etc.
MULTIPLE DETECTOR CHAIN SYSTEM - TYPICAL EXAMPLES
DETECTOR –ID SETUP.
When wiring multiple model ‘X’ detectors to
the GDP2X range it is important to identify
each detector and in which monitoring zone
the detector is located - for the GDP2X system
to receive and display data.
ID switches are fitted to detector circuit boards.
The diagram opposite shows how to configure
switches for each detector and is also printed
onto the detector circuit boards for quick
reference.
Refer to your detector manual.

Installation & Operation Manual Merlin GDP2X
AGSGDP2X - IOM Iss: 3 03-20 7
DETECTOR CHAIN TERMINATION
Example 1.
Example 2.
FIRE PANEL
The terminal for fire alarms is detailed on the circuit board as [FIRE PANEL].
HEAT SENSOR
The terminal for heat sensors/ thermal
links is detailed as [HEAT SENSOR].
EM STOP
Connections for remote emergency
shut-off or stop buttons is detailed on
the circuit board as [EM STOP].
These terminals are volt free and fitted
with links to represent a closed circuit.
DETECTOR Chain Termination Resistor Switch
Signal communication issues may occur where the bus length is too long or high baud rates
are used. In this instance –terminating at each end of the chain may help the quality of the
data signal. To do this - turn on the [CHAIN TERMINATION RESISTOR] switches shown below.

Installation & Operation Manual Merlin GDP2X
AGSGDP2X - IOM Iss: 3 03-20 8
BMS OUTPUT
Connections are available on the board
for Building Management Systems.
[NO] [COM] [NC]
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 24V DC output and other external relays that affect other devices and
controls such as purge fans and audible alarms etc.
SOUNDER-STROBE
There are connections for an external
sounder alarm/ strobe lighting to
activate on alarm.
Refer to your sounder/ strobe manual for
wiring.
Settings Switch
On the front fascia circuit board you’ll find a SETTINGS dip-switch –when switched to ON, the
screen will display the settings menu –you can now configure your GDP2X.
To view, change and save settings, you must provide
mains power to [POWER/LINE IN].
When changes have been made –turn the
SETTINGS switch OFF and the system will
automatically restart.

Installation & Operation Manual Merlin GDP2X
AGSGDP2X - IOM Iss: 3 03-20 9
Settings Menu
The GDP2X has a touch screen which allows the engineer/ user to configure the system.
Adjust the screen brightness. Change/Select option
Press or slide the cursor up and down. Press the blue option box or press and hold.
When changes have been made –turn the SETTINGS switch OFF and the system will restart.
Settings Options Explained
FUNCTION
OPTIONS
Explanation
BMS relay ON/OFF for-
- Gas
- Error
Gas changes relay state with gas valve status only.
Error changes relay state upon all alarm messages.
Auto Start-
- ON
- OFF
In the event of a power loss - the GDP2X will restart
automatically when power is restored, or not.
Factory Set Condition
BMS relay ON/OFF for-
- Gas
Auto Start-
- OFF
Trouble Shooting
Fault.
Possible Cause/Correction.
Detector not responding.
oIncorrect wiring.
oID switches not properly configured.
oTermination switches not set up correctly.
Service message
oDetector requires service –contact supplier.
End of Life message
oDetector requires replacement –contact supplier.

Installation & Operation Manual Merlin GDP2X
AGSGDP2X - IOM Iss: 3 03-20 10
Specification
Product:
Gas Detection Panel
Model:
GDP2X
Display
2.8” Touch Screen TFT
Power Input Voltage
100-120V AC
Gas Valve Output Voltage
100-120V AC
BMS Output:
3A
Current Consumption
20W max (full load)
Internal Fuse
3.15A
Operating Temperature
32 –122°F 30-85%RH Non-Condensing
Audible Alarm Buzzer dB
65 dB (300mm distance in quiet conditions)
Housing Material
Polylac PA-765
Flame Rating
UL 94
Approvals
CE, RoHS
O/All Dimensions (H x W x D) mm / inch
5.51 x 7.48 x 2.44”