Medem (UK) Limited
Project House, 19 Dallimore Road,
Roundthorn Industrial Estate,
Manchester, M23 9NX
Tel:: +44 (0) 161 233 0600
Fax::+44 (0) 161 233 0601
Website: www.medem.co.uk
e-mail:[email protected]
Cert No. 10213
AGDS-MC Operating and Maintenance
Operation
With the system switch in the off position; the green power LED should be lit and the LCD displaying
the message “Multi Gas Detection System” all other LED’s should be off.
Normal operating procedure for gas (when power is first applied)
Turn system switch to the on position.
The gas valve will open, the LCD will display the message “Gas On” and ‘Gas On’ LED will
light.
Maintenance and testing
To test all features the system.
With the system switch off; the green power LED should be lit; turn the system switch to
on
:
The LCD will display ‘Gas On’, the ‘Gas On’ LED will light and the gas valve open, gas should now be
available for use.
Verify all gas detectors are being correctly identified by the AGDS-MC;
Remove the AGDS-MC’s terminal cover and locate the “Display Detectors” buttons (see installation
instructions).
Press and hold the button to display on the LCD screen all “learnt” detectors, ensure all detectors
“type” and “ID” are being correctly identified.
With the gas available for use, apply a small amount of the target gas to each detector:
The AGDS-MC will indicate a low level alarm at 5% LEL for combustible gases, 80ppm for CO, and
a high level alarm at 10% LEL for combustible gases, 100ppm for CO.
The detector LED will turn from ‘Green’ (powered) to ‘Red’ (alarm).
With the AGDS-MC in an alarm state;
The LCD will display the message Low Alarm or High Alarm.
The alert LED will light, the tone will sound and the Gas On LED will go out.
The Gas valve will close
There should be a manual operational test on any installed Emergency stop buttons,
which when operated will isolate the gas supply and remain isolated until a manual reset is
completed.
A yearly test and inspection of the solenoid valve and let by test should be carried out by a qualified
technician i.e. Gas safe registered engineer.
The detectors are designed to have very low drift so recalibration on site is not required but should
be replaced every 5 years in a clean environment but consideration should be given to
replacement after 3 years if contamination is a possibility.
A functionality test should be carried out
every 6-12 months.
If at any time there is an alert or the sounder sounds follow these instructions, further
information can be found both in the installation instructions and by contacting Medem
(UK) Ltd.
