Merlin GDP4
Product Data Sheet
Rev: 05 Date: 08-01-18
3
1
General information
The Merlin GDP4 is a multi-zone gas detection panel which can be used in many applications, e.g.
factories, car parks, shopping centres and the most common being a boiler house application. The
GDP4 can be used with up to 12 gas detectors wired in parallel (maximum 3 detectors per zone).
Many varieties of detectors are compatible with GDP4, e.g. Natural Gas, Carbon Monoxide, LPG and
Oxygen depletion. These detectors can be used in any combination. Also multiple thermal links can be
used, when wired in series. The GDP4 can be integrated with a BMS, fire alarm and remote emergency
shut-off buttons.
2
Installation
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.
2.2
Mains Supply
A 230VAC electrical supply should be supplied to the panel. This should be
externally fused at 3 Amps using a fused spur and should be con
nected to the terminals marked ”LNE
Power
”
2.3
Gas solenoid valve
The gas solenoid valve should be powered using the terminals on the
Merlin GDP4
marked “LNE GAS VALVE”.
2.4
Gas Detector
The terminals detailed on the circuit board as “Gas Detector Zone 1”, “Gas
Detector Zone 2”, “Gas Detector Zone 3” & “Gas Detector Zone 4”. These connections are “+,-“ and
”CL” and can be wired to a Merlin gas detector. Natural gas, Carbon monoxide or LPG. Other detector
types are available.
2.5
Remote emergency shut off buttons
The terminal for remote emergency shut-off buttons is
detailed
on the circuit board as “EM REMOTE”. These connections are linked out as a factory setting.
Remote emergency shut-off buttons should be volt free and wired to the Merlin GDP4 using two-core
cable.
2.6
Heat Detector
The terminal for heat detectors is detailed on
the circuit board as “HEAT
SENSOR”. These connections are linked out as a factory setting. Heat detectors should be volt free and
wired to the Merlin GDP4 using two-core cable.
2.7
Fire Alarm
The terminal for fire alarms is detailed on the circuit board as “FIRE PANEL”.
These connections are linked out as a factory setting. Fire alarms should be volt free and wired to
the Merlin GDP4 using two-core cable.
2.8
BMS Connections
Terminal connections are available on the circuit board for connections to
Building Management systems etc. Detailed on the ci
rcuit board as “BMS OUT N/C, COM and N/O”
these are volt free connections.
2.9
Sounder Alarm
The terminal for sounder alarms is detailed on the circuit board as
“SOUNDER/STROBE”. Sounder alarms should be wired using low voltage cable and wired to the Merlin
GDP4 using two-core cable. This terminal has a 24VDC output.
2.10
Internal Buzzer
Operates at 90dB measured 30cm from closed panel.
2.11
Mute
The button on the front fascia of the panel detailed "MUTE”, mutes the internal buzzer.
Note: all low voltage connections should be made using a screened cable. To avoid electrical
interference this should not be in the same conduit as mains cable as per the low voltage
directive.
