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Installation & Operation Manual
S&S Northern provide a range of detection panels which can be used in many applications such as factories, car
parks, shopping centres and most commonly for this model - boiler houses.
The GDPX+ can be used with up to 16 Merlin gas detectors (sold separately) for monitoring and detecting gas
including carbon monoxide, liquid petroleum gas and methane.
The information contained within this manual should be referenced for typical installation and operation only.
For specific requirements that may deviate from the information in this guide – contact your supplier.
GDPXPLUS - IOM Iss: 8 02-21
MERLIN GDPX+
Gas Detection Panel
Installation & Operation Manual
Please read this manual carefully and retain for future use.
Merlin GDPX+
1
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Table of Contents
Related Manuals for S&S Northern MERLIN GDPX+
Summary of Contents for S&S Northern MERLIN GDPX+
- Page 1 Installation & Operation Manual Merlin GDPX+ MERLIN GDPX+ Gas Detection Panel Installation & Operation Manual Please read this manual carefully and retain for future use. S&S Northern provide a range of detection panels which can be used in many applications such as factories, car parks, shopping centres and most commonly for this model - boiler houses.
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Page 2: Table Of Contents
Installation & Operation Manual Merlin GDPX+ Contents Important Warning Statements ..............3 Installation ...................... 4 Planning ......................... 4 Quick Installation Arrangement ..................4 Fixing ..........................5 Board Connections Diagram ..................5 Board Connections Overview ..................6 Wiring your Detector ...................... 8 Creating a Detector Chain ..................... -
Page 3: Important Warning Statements
Installation & Operation Manual Merlin GDPX+ Important Warning Statements Please take the time to thoroughly read this user’s guide which should be retained for future reference. It is recommended that this device be commissioned upon installation and serviced at least annually. Do not apply lighter gas or other aerosols to detectors –... -
Page 4: Installation
Installation & Operation Manual Merlin GDPX+ Installation Planning The Merlin GDPX+ is a multi-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 16 Merlin gas detectors (model TFT) for monitoring and detecting gas including carbon monoxide, liquid petroleum gas and methane. -
Page 5: Fixing
Installation & Operation Manual Merlin GDPX+ Fixing Unpack all the parts! Designed for surface mounting, it must be installed by a licensed, insured contractor. 1. Carefully remove the front cover from the unit by unscrewing the four bolts located at each corner. To do this –... -
Page 6: Board Connections Overview
Installation & Operation Manual Merlin GDPX+ Board Connections Overview POWER / LINE IN 100-240Vac 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. - Page 7 Installation & Operation Manual Merlin GDPX+ BMS MODBUS Connections for Master/Slave protocols used in Building Management Systems to communicate between devices including the GDPX+ panel are used with [BMS MODBUS] – RTU. For MODBUS communications, a shielded and twisted cable is used. Any cable with similar characteristics can be used to connect all the devices together.
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Page 8: Wiring Your Detector
Installation & Operation Manual Merlin GDPX+ Wiring your Detector 12-24VDC power and Modbus communication data cables are wired to Merlin gas detection panels – GDP2X or GDPX+. Both terminals are identified as [DETECTOR CHAIN + - D+ D-]. Up to 16 detectors can be connected, chained in parallel up to approx. -
Page 9: Detector Chain Id Switches
Installation & Operation Manual Merlin GDPX+ Reversing the [D+] and [D-] connections of any device can lead to the whole system to stop working owing to reverse polarity found on the terminals. In order to avoid this problem, it is recommended that the cable of same colour should be used to connect all [D+] terminals together and similarly cable of same colour to be used to connect all [D-] terminals together. -
Page 10: Access Configuration Settings
Installation & Operation Manual Merlin GDPX+ Access Configuration Settings 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 GDPX+. To view, change and save settings, you must provide mains power to [POWER/LINE IN]. When changes have been made –... -
Page 11: Factory Set Condition
Installation & Operation Manual Merlin GDPX+ - FAN - NG - CO External devices connected to [INPUT 2] terminal i.e. gas detectors, INPUT 2 name- - LPG emergency stops, heat sensors, fans and CO2 monitors. - CO2 - EM - HS - 15 min Time (in minutes) that the Fire Alarm Bypass (FAB) feature will be enabled FAB timeout-... -
Page 12: Specification
Installation & Operation Manual Merlin GDPX+ Specification Product: Gas Detection Panel Model: GDPX+ Display 4.3” Touch Screen TFT 100-240V AC Power Input Voltage Gas Valve Output Voltage 100-240V AC Electrical Contactor Output Voltage 100-240V AC BMS Max Output BMS Modbus protocol Current Consumption 48W max (fully loaded) Internal Fuse... -
Page 13: Operation
Installation & Operation Manual Merlin GDPX+ Operation First Power Up On connecting mains power, the GDPX+ panel will ‘warm up’ for approximately 60 seconds – during this time the screen will display an ‘initialisation’ message. If gas proving is configured in the settings menu – the screen will display the gas pressure whilst testing the gas line for leaks. -
Page 14: Diagnostic Screen
Installation & Operation Manual Merlin GDPX+ Diagnostic Screen Touching the Diagnostic screen (D) will display three characteristics of the GDPX+. Gas supply pressure monitored by the pressure sensor connected to the downstream port of the gas valve. Fire Alarm Bypass (FAB) (Enable/disable). -
Page 15: Alarm Message List
Installation & Operation Manual Merlin GDPX+ Alarm Message List EMERGENCY SHUT OFF An emergency shut-off button has been activated. Pressing MUTE on the GDPX+ will silence the audible alarm buzzer. FIRE PANEL ALARM The fire alarm panel has reached alarm status. Pressing MUTE on the GDPX+ will silence the audible alarm buzzer. -
Page 16: General Maintenance
Installation & Operation Manual Merlin GDPX+ General Maintenance Cleaning High concentrations of alcohol found in many products may damage, deteriorate or affect the gas sensing elements – such as; wine; deodorants; stain removers; thinners! Other gases and substances to avoid; Corrosives (i.e. chlorine & hydrogen chloride); Alkali metals; Basic or acidic compounds;... - Page 17 Installation & Operation Manual Merlin GDPX+ How often should I Bump Test a detector? Regular bump tests are important to make sure the detector is able to detect a release of gas as early as possible. A bump test usually takes seconds (gas type dependant) and is often completed alongside a scheduled fire alarm test, however the frequency should be determined following a risk assessment by the end user.
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Page 18: Service & Calibration
Installation & Operation Manual Merlin GDPX+ Service & Calibration Access to the interior of the detector or control panel, when carrying out any work, must only be conducted by trained personnel. Before carrying out any work ensure local regulations and site procedures are followed. Do not tamper with or in any way disassemble the detector. -
Page 19: Detector Calibration
Installation & Operation Manual Merlin GDPX+ Detector Calibration Do not conduct calibration of sensors in conditions outside any recommended ranges. Use the specified calibration gas only and a fixed flow regulator. Always use equipment in accordance with their safety datasheets. Calibration gases must be prepared and mixed to traceable international standards. -
Page 20: Failed Calibration
Installation & Operation Manual Merlin GDPX+ How do I Calibrate a Detector Access to the interior of the detector or control panel, when carrying out any work, must only be conducted by trained personnel. Before carrying out any work ensure local regulations and site procedures are followed. Do not tamper with or in any way disassemble the detector. -
Page 21: Gas Sensor Types & Reaction Times
Installation & Operation Manual Merlin GDPX+ Gas Sensor Types & Reaction Times The time for gas sensors to react to their target gas will vary dependant on the type of gas detector/gas sensing element. You should always refer to the appropriate specification for information including sensor type and alarm levels i.e. -
Page 22: Service Record
Installation & Operation Manual Merlin GDPX+ Service Record Date Device ID Pass Sign GDPXPLUS - IOM Iss: 8 02-21... - Page 23 Installation & Operation Manual Merlin GDPX+ Date Device ID Pass Sign GDPXPLUS - IOM Iss: 8 02-21...
- Page 24 Installation & Operation Manual Merlin GDPX+ Installation Details Please pass this manual to the system owner / user. Date of Installation: Installation Location: Organisation: Stamp/Signature of the installer: We recommend all Merlin gas detection equipment is commissioned by competent/trained engineers to ensure correct installation and operation.