MGS Series Controller Manual
6709-9000 Rev 1 13
Sensors must be located within the appropriate wire lengths from the
central control unit (if used).
In all cases the sensor supplied is designed for maximum sensitivity to a
particular gas. However, in certain circumstances false alarms may be
caused by the occasional presence of sufficiently high concentrations of
other gaseous impurities. Examples of situations where such
abnormalities may arise include the following:
• Plant room maintenance activity involving solvent or paint fumes
or refrigerant leaks.
• Accidental gas migration in fruit ripening/storage facilities
(bananas - ethylene, apples - carbon dioxide).
• Heavy localized exhaust fumes (carbon monoxide, dioxide,
propane) from engine-driven forklifts in confined spaces or close
to sensors.
Bacharach recommends setting the alarm delay to minimize false
alarms. See Section 4.7 for more information.
2.3. Mounting Dimensions
The controllers contain a single teardrop cutout at the top center of the
enclosure. Two smaller holes are located in the bottom corners of the
enclosure. Refer to the mounting dimension figures that follow.
Each enclosure base provides a ½” standoff from the mounting surface
to allow use of a power line knockout in back of enclosure base. Power
wiring may also enter the enclosure via one of the input holes on the
bottom of the enclosure.
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