S&S Northern MERLIN GDP4 Installation Operation & Maintenance
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S&S Northern MERLIN GDP4 Installation Operation & Maintenance

Safe area gas detector controller
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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 boiler houses. The GDP4 is used with up to twelve (12) gas detectors in a single cable
run for monitoring and detecting gas in zones considered safe including CO, LPG and NG.
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.
Rev: 11 03-21
MERLIN GDP4
Safe Area Gas Detector Controller
Installation, Operation & Maintenance
Please read this manual carefully and retain for future use.
Merlin GDP4
1

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  • Page 1 Installation & Operation Manual Merlin GDP4 MERLIN GDP4 Safe Area Gas Detector Controller   Installation, Operation & Maintenance 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 boiler houses.

  • Page 2: Table Of Contents

    Installation & Operation Manual Merlin GDP4 Contents Important Warning Statements ................... 3 Installation ..........................4 Typical Application, Location & Positioning ..................4 Access & Mounting ..........................4 Internal Board Overview ........................5 Board Connections Overview ......................5 Wiring your Detector ......................... 6 BMS Switch ............................

  • Page 3: Important Warning Statements

    Installation & Operation Manual Merlin GDP4 Important Warning Statements Please take the time to thoroughly read these instructions which should be retained for future reference. Detectors are shipped pre-calibrated and configured. The expected lifetime of a gas sensor is 3-10 years upon initial power up dependant on your target gas and environmental factors.

  • Page 4: Installation

    Typical Application, Location & Positioning The Merlin GDP4 is a multi-safe zone gas detection panel which can be used in many applications such as factories, car parks, shopping centres and most commonly - boiler houses. It can be used with up to 12 Merlin gas detectors (3 detectors per zone terminal) for monitoring and detecting gas including carbon monoxide, liquid petroleum gas and methane.

  • Page 5: Internal Board Overview

    Installation & Operation Manual Merlin GDP4 Internal Board Overview 100-240VAC Mains power Input 100-240VAC Gas Solenoid Valve Output. 24VDC Gas detector power supply (Zone 1) 24VDC Gas detector power supply (zone 2) 24VDC Gas detector power supply (zone 3) 24VDC Gas detector power supply (zone 4)

  • Page 6: Wiring Your Detector

    Installation & Operation Manual Merlin GDP4 Wiring your Detector Power is supplied to a detector via the GDP terminal [+ / -] and using the panel [GAS DETECTION ZONE] terminal. If you are using a GDP panel you will need to use the detector [C/L] terminal as an alarm relay.

  • Page 7: Factory Set Condition

    Installation & Operation Manual Merlin GDP4 Factory Set Condition SWITCH CONDITION AUTO RESET ZONE 1 ZONE 2 ZONE 3 ZONE 4 Trouble Shooting Fault. Possible Cause/Correction. Incorrect wiring Detector not responding. Zone switches not properly configured Incorrect Wiring Panel not responding.

  • Page 8: Mute & Reset Buttons

    Installation & Operation Manual Merlin GDP4 Mute & Reset Buttons MUTE The mute button is located on the front fascia of the GDP4 and is used to mute the sounder inside the board when in alarm. The internal buzzer operates at approximately >60db measured 30cm (1ft) from a closed panel. The mute button is used to mute the sounder inside the board when in alarm.
  • Page 9 Installation & Operation Manual Merlin GDP4 How often? Regular bump tests are important to make sure the detector is able to detect a release of gas as early as possible and usually takes seconds (gas type dependant i.e. CO sensors will take over a minute) and is often completed alongside a scheduled fire alarm test, however the frequency should be determined following an appropriate risk assessment by the end user.

  • Page 10: End Of Operational Life (Eol)

    Installation & Operation Manual Merlin GDP4 End of Operational Life (EOL) The typical life of a gas detector depends on its application and intended target gas, in addition, the operational life can be prolonged if the system and equipment is installed and maintained in accordance the instructions stated within this manual.
  • Page 11 Installation & Operation Manual Merlin GDP4 Page intentionally left blank Rev: 11 03-21...
  • Page 12 Installation & Operation Manual Merlin GDP4 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 be commissioned by a competent/trained engineer to ensure correct installation and operation.

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