Medem AGDS-2em v2, Руководство по установке

Страница: 2 / 9

2
00315
System description
The AGDS-2em V2 is a gas detection system designed to monitor the atmosphere for target gases. The system comprises of a
mains powered panel capable of operating up to two Medem sensors
The sensors are pre-calibrated by Medem (UK) Ltd such that they only require to be connected to the panel and functionally
tested.
In the event of a high alarm from one of the sensors the system will isolate the gas supply by closing a connected electric control
valve. Emergency stop buttons and Thermal Links can be fitted and a fire alarm can close the gas valve when connected to the
panel.
Control Panel
Low Voltage Gas Detectors
Combustible detectors are pre calibrated at 5% LEL low alarm and 10% LEL for the high alarm.
Carbon Monoxide detectors are pre calibrated at 20ppm low alarm and 30ppm for high alarm.
Carbon Dioxide detectors are pre calibrated at 2800ppm low alarm and 5000ppm for high alarm.
Connect a detector to the “DETECTORS 1-2’ terminals (
6 ), this is a 4 wire connection (0V, +VE, MA, MB). Each detector has a rotary
address selector switch (0-F) set to address 1 or 2.
Once connected and addressed you are required to learn the sensors to the panel by pressing the ‘LEARN DETS’ (
10 ) button
Each sensor unit has an LED which shows green when power is applied.
Note: There is a warm up period after initial power up of approximately 90 seconds. During this time the green LED will flash once
per second and the output signal will be inhibited. This is to prevent spurious alarms. After the warm up period and on application
of gas, the red LED will light when a high gas alarm level is reached.
Loss of communication from a learnt detector will cause the panel ‘Detector’ to flash yellow.
Additional sensor information can be found on page 6.
When first powered or after a loss of power press and hold the reset button for 2 seconds to start the system and
open the gas valve.
AGDS-2em v2
Detector LED’s
No Detector Off
Detector Powered Green (flashing during warm up)
Low Alarm Flashing red (every second)
High Alarm Flashing red (every 1/2 second)
High Alarm & Gas isolated Permanent Red
Sensor Alert Yellow
Panel Buttons:
Emergency Stop
Mute button for the internal toner
Reset button Press and hold reset button (2’s) when power is
first applied to enable gas.
LED indications:
Power On Green
Gas On Red
Em Stop Yellow
Fire Alarm Yellow