Copyright © BEP Marine Limited, All rights reserved
INST-600-GD-V5
29/11/07
Page 7
11 Sensor Installation
The sensor is supplied with a 5-meter cable.
For LPG and Petrol fumes, which are heavier than air, mount the sensor in a low dry position
where the gas is likely to collect. The sensor must be mounted clear of bilge water.
NOTE: If the sensor gets wet then the sensor becomes inoperable and must be replaced.
For CNG, which is lighter than air, mount the sensor just below ceiling height but not above
cooking or heating appliances.
Fasten the sensor with the supplied screws.
Route the sensor cable through to the control head and connect as per the wiring diagram.
12 Operation
On applying power to the unit, the control head goes through a test cycle. This will take approximately
45 seconds. During this period the sensor heads are being cleaned and tested, at this time there will
be a slow beep from the audible alarm and all the lights will flash amber. Towards the end of this
period the pulse of the beeper and lights will increase, if the unit senses that the environment is clear
then the control head will go into safe mode. The beeper will turn off and the sensor lights will change
to green.
With the control head in safe mode the gas valve can be turned on and off. When on, the valve light
will show red (600-GDL only). Should the control head go into alarm mode the gas valve will be
automatically turned off (600-GDL only). A red light will indicate which sensor has detected gas and
the alarm will beep quickly.
1. Sensor #1 indicator
2. Sensor #2 indicator
3. Solenoid valve on/off indicator*
4. Solenoid valve on/off switch*
5. Test/alarm mute switch
* Refers to 600-GDL features only
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