ADS Intrinsically-Safe TRITON+, Installation, Operation And Maintenance Manual

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Monitor Installation 7-7
Mounting the Monitor to the Manhole
Rim
Mounting a monitor to the manhole rim has certain advantages.
Removing and reinstalling are easier. The rim may be more
structurally sound than deteriorated rungs. However, the manhole
lid must clear the mounting hardware while it is removed or
replaced.
Mount the monitor bracket/flange (ADS p/n I40-0009) to the
manhole rim in the following way:
1. Determine the appropriate location to mount the monitor
handle to the inside of the iron manhole rim. Consider the
following when selecting the proper location:

Select a location that will allow you to remove the monitor
easily during service visits using the mounting bracket
(extension handle).

Select a location that provides only a minimal potential for
the monitor to experience surcharge conditions.

Select a location that will prevent the manhole lid from
potentially damaging the monitor during removal or when
rotating in the opening.

Select a location that will allow personnel to enter/exit the
manhole without removing monitor.
2. Hold the keyhole at the top end of the bracket against the lower
inner rim of the manhole, and mark the location for the
stainless steal stud through the keyhole in the bracket. Make
sure there will be enough room to lift the bracket up and over
the stud when installed.
3. Drill a hole(s) into the manhole rim 1 inch (2.5 cm) deep using
a carbide-tipped 5/16-inch drill bit or one that matches the size
of the anchor bolt to be inserted.