1100-2295 Rev 1
10
MGS-408 User Manual
3.3. Suitable / Appropriate Locations
The MGS-408 Gas Detection Controller should be centrally located in the facility
(preferably outside of the mechanical room)
and should be easily accessible for visual
monitoring and servicing. This is the “split architecture design” for safety of the operator.
Dirt, grease, and oils can adversely affect the operation of the controller. The controller
should be installed out of direct sunlight in a clean, dry area that is not subject to
temperature or humidity extremes. Installation in a mechanical room is acceptable
provided reasonable environmental conditions exist. If there is a question, consider
installing the unit outside of the mechanical room in a cleaner area of the facility.
The controller can be located up to 1,000 feet
(305 m)
from the furthest gas monitor
when using RS485 communications. The available distance is less when using the
controller as the power supply for down line gas transmitters. Careful attention to
voltage drop over distance with a suitable wire gauge employed is also required.
(See
“3.6.1 MGS-408 Gas Detection Controller Network” on page 12.)
The controller provides an interface by which you can monitor, acknowledge alarms,
and observe conditions inside the mechanical room.
3.4. Mounting the Gas Detection Controller
The MGS-408 Gas Detection Controller should be installed plumb, level and securely
fastened to a rigid mounting surface. The enclosure utilizes four mounting holes
designed for #6
(or M3.5 or M4)
pan head fasteners
(included)
. Mounting holes are
located in the four corners of the enclosure, accessed by loosening the two screws
on the top of the enclosure lid and opening the front panel. Install and adjust the
screws as necessary to hold the unit securely against the mounting surface, close the
front panel and tighten the screws.
WARNING:
Copper conductors for connection to supply mains must be
made in accordance with NEC / CEC and local codes.
NOTE:
A certified AC power disconnect or circuit breaker should be mounted
near the controller and installed following applicable local and national
codes. If a switch is used instead of a circuit breaker, a properly rated
CERTIFIED fuse or current limiter is required to be installed as per local or
national codes. Markings for positions of the switch or breaker should state
(I) for on and (O) for off
.
