Eaton Crouse-Hinds MEDC SM87BG Manuel Technique page 6

Call points SM87BG/PB
English
3.0 Operation
The operating voltage of the unit is stated on the unit label.
SM87BG General arrangement
SM87BG units - operation
The unit is operated by breaking the glass element in the
front of the cover using the hammer attached to the unit.
If a lift flap has been specified, this will need to be raised
first to gain access to the glass element.
SM87BG unit - resetting procedure
a. To replace the glass, a kit containing O-rings and glass
is provided.
b. Unscrew and remove the circular bezel on the front of
the unit.
c. Remove the original O-rings and glass and ensure the
grooves in the bezel and cover are clean.
d. Fit the larger O-ring into the groove on the cover.
e. Fit the smaller O-ring into the groove on the underside
of the bezel:-
I. Offer the O-ring up to the groove.
II. Place thumbs of both hands side by side onto
the O-ring.
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Call points sM87BG/pB TM146 January 2023 www.eaton.com
III. Press the O-ring down into the groove circumference
maintaining even pressure, forcing the O-ring into the
groove.
IV. The O-ring should be fully seated in the groove and
not fall out when fitting the bezel to the cover.
V. Centralise the new glass element on the cover
f. Place the new glass element into position on the
cover and assemble the bezel over the top of the glass
element.
g. Ensure the glass element stays central on the cover
by holding down the glass with thumb through the
hole in the centre of the bezel.
h. Carefully use the glass element to depress the
plunger until the glass is in full contact with the cover
O-ring. Ensure there is an even gap around the glass.
Without allowing the glass element to move, screw
down the bezel until the bottom of the bezel is
tightened against the cover.