6
13/12/2017
Gas Detection
Gas Detectors
IMPORTANT - Gas Detectors should not be installed until all building, construction or painting work etc.. Is completed, as these
works can effect the sensitivity and longevity of the detectors.
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.
The system is capable of operating a mix of up to 16 detectors (additional power pack may be required) of different types.
The detector types are:
•
Carbon Monoxide.
•
Combustible gases (Methane, Propane).
Detector location will vary dependant on the individual characteristics of the target gas that is being monitored for. See the gas
detectors own instructions for more guidance.
All current wiring regulations must be followed with reference to running low and mains voltage cables together.
The maximum cable length between a detector and the control panel should not exceed 100 metres, if the distance between
the main panel and the detectors is greater than 20metres a 1mm screened cable must be used on the +VE, 0v terminals
Gas detectors, require a four core screened Belden type security cable or 600v rated BMS cable (max cable length of
100meters.)
Remote emergency stops and thermal links require a two core screened cable.
Warranty will be void if Fire Protection Cable or cable over 1mm dia. is used on the SELV side
AGDS-2em
Detector Information
+VE supply & Comm’s
From either the main panel
Address Selector
The selector must be set to either 1 or 2.
Detector 1 (
6&7
) = use address 1
Detector 2 (
8&9
) = use address 2
You must then enable detector
monitoring for 1 & 2 using dip switch (
12
)
Connection and addressing
Status LED
