2 MCU INSTALLATION
The MCU Control Units and FGD Gas Detectors are fully tested prior to delivery. However, after
installation we strongly recommend that full system testing and commissioning be carried out.
Status Scientific Controls Service personnel are best equipped to perform the relevant tests and
commissioning and will be able to offer advice regarding installation faults.
WARNING
Installation should be made in accordance with either British Standard BS EN60079-
14 (which supersedes BS5345) “Electrical Apparatus for Explosive Gas
Atmospheres”, or in accordance with the relevant National or Local regulations.
CAUTION
The MCU Control Units and associated modules contain no user serviceable parts. Refer all
module servicing to qualified service personnel.
2.1 Siting the MCU
THE MCU CONTROL UNIT MUST BE SITED IN A NON-HAZARDOUS LOCATION WHERE
THERE IS NO RISK OF THE PRESENCE OF POTENTIALLY EXPLOSIVE GAS.
Either a 110V-120V or a 220V-240V AC supply can be used to power the control unit;
alternatively a 24V DC supply can be used.
The site of installation should be chosen with regard to the following:
• This equipment should not be located near to known sources of heat.
• Operating personnel should be within convenient reach of the equipment and within
audible distance of alarms.
• Maximum loop lengths of cable runs and cable inductance to resistance ratios must not
exceed limits shown in the relevant loop diagrams (refer to section 3.2).
• Avoid mounting this equipment near potential sources of electrical interference e.g.
motors, switch gear, radio transmitters etc.
Mounting details for the MCU enclosures are located within the Appendix (section 8).
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