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Medem AGDS-2em Installation Instructions Manual

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The AGDS-2em is a single or two channel gas detection system designed for use in boiler houses. Up to two
low voltage detectors can be connected for the detection of natural gas, LPG or carbon monoxide.
In the event of a high alarm from one of the detectors, the system will isolate a connected control valve. Low
alarm indication is also given
It is designed for use primarily in boiler house.
Before commencing installation please familiarise yourself to the equipment by reading the comprehensive
installation instructions. If in doubt then please call 01 4614300.
It is a statutory requirement that this safety system is installed and commissioned
A commissioning certificate must be issued to the end user along with instructions for the operation of the
equipment.
As the Manufacturer Medem UK or approved Medem commissioning engineer should commission this
safety system whereupon a commissioning report will be forwarded to the installing agent who should
provide a copy to the end user.
to the satisfaction of the manufacturer.
• Gas Detection (one or two detectors)
• Natural gas, LPG and carbon monoxide
• Remote emergency stops
• BMS relay (high alarm status)
• 5 year warranty

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Summary of Contents for Medem AGDS-2em

  • Page 1 The AGDS-2em is a single or two channel gas detection system designed for use in boiler houses. Up to two low voltage detectors can be connected for the detection of natural gas, LPG or carbon monoxide. In the event of a high alarm from one of the detectors, the system will isolate a connected control valve. Low alarm indication is also given It is designed for use primarily in boiler house.

  • Page 2: System Description

    The AGDS-2em system comprises of a mains powered main control panel capable of operating two sensors, either combustible or Carbon Monoxide gas or a mixture of both. The sensors are pre-calibrated by Medem (UK) Ltd such that they only require to be connected to the panel and functionally tested.

  • Page 3: Main Features

    EM Stop LED - will illuminate when any connected remote emergency stop buttons have been pressed (Check detector address and channel enable switch settings) Alert LED - will illuminate if comm’s to a detector are lost. Front Panel button connection - Emergency Stop - not available on this model, (AGDS-2em only)

  • Page 4: Basic Connections

    Basic Connections 230v Supply Gas detector Gas detector 3Amp Fused Spur Set to address 1 Set to address 2 Enable channel 1 Enable channel 2 Mains Rated (12) (12) Potential free contact, Max load 5amp’s (latching relay) EM Stop Buttons, Gas Solenoid Thermal links (Normally closed)
  • Page 5 Use terminals TB2 A & C Use terminals TB2 A & C The stop buttons supplied by Medem are of a “Push Glass, key resettable” style, when activated a yellow indicator bar will show and the unit will require resetting using the key provided.

  • Page 6: Detector Information

    Ensure that the protective cover labels (RED) are removed only after the completion of all building work and the system has been commissioned by the Medem engineer. The labels are required to be removed for the detectors to operate, but removal before the completion of works risks contaminating the sensor element.
  • Page 7 After installation a simple bump test can be performed by using an appropriate level test gas in order to check operation. Full testing and calibration checking takes place during a Medem commissioning. Detector location will vary dependant on the individual characteristics of the target gas that is being monitored for.

  • Page 8: Warranty

    Where a warranty claim is made then, where appropriate, a written order to attend site must be provided to Medem UK A cost for labour and travel to site will be prepared as a quote. The cost must be included in the order.
  • Page 9 At this point press the reset switch and the control valve will open and the system in now running. Notes. It is recommended that all systems are commissioned after installation by Medem UK. Please do not hesitate to call for advice on the...

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