GDS GasVac LG-1, Руководство по эксплуатации

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17
INSTALLATION
The enclosure should be securely mounted to a substantial wall at chest height using the brackets
provided, its position should be such as to provide a clear field of vision of any alarm indications.
To position the enclosure a supporting tressel of the required height should be positioned to enable
two men to lift the enclosure on to the tressel following which the enclosure mounting brackets
should be located and attached to the enclosure and wall by either large screws or expansion bolts.
Equipment weight – 30kg – standard system.
Switch on the power. If the system is fitted with cabinet internal leak detector (auto shutdown device)
the system has to be manually started by pressing the push switch located on the internal power
supply unit). To prevent possible back pressure affecting the sensor readings vent tubes 2 x 4mm ID
should be kept as short as possible and have no reduction in total size.
The control unit is designed for installation in a safe area only. Positioning of the instruments
should be chosen with regard to the following points:
• Away from sources of local heat with room for adequate ventilation
• Within easy reach and audible distance of operating personnel
• Convenient to a separately fused power supply
• Incoming cables and outgoing alarm annunciation
MAINS OPERATED UNITS
• The equipment should be supplied from a 2A fused/switched spur.
• The spur unit should be identified and positioned locally to the equipment.
• To prevent lateral cable movement the mains cable within the enclosure should be restrained
using a clamp.
• Earth leads within the enclosure should be a minimum of 300mm longer than the mains Live
and Neutral cores
Field cables which are terminated within the control unit enclosure should be kept as short as
possible and not allowed to cross over electronic components or the ribbon cable.
The instrumentation should be subjected to a minimum of vibration and shock.
Ascertain the voltage rating of the power supply to which the instrument will be connected.
For further information relating to the installation and maintenance of gas alarm systems refer to
the IEC60079 series guidance documents.