MEDC SM87BG Technische Anleitung Seite 4

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.
3.0 OPERATION
The operating voltage of the unit is stated on the unit label.
SM87PB units - operation
SM87GB units - operation
The unit is operated by lifting the flap on the front of the cover, then depressing the steel actuator underneath.
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.
Depending on the unit type ordered, the actuator will either remain in its depressed position (latching versions)
or return to its original position (momentary versions).
SM87BG unit - resetting procedure
SM87PB units - 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.
On units with a latching mechanism, once operated, the actuator remains in its depressed position. To reset
c. Remove the original O-rings and glass and ensure the grooves in the bezel and cover are clean.
the call point, lift the flap on the front of the cover and insert the key (provided with the unit) into the slot in the
d. Fit the larger O-ring into the groove on the cover.
front face of the actuator. The key should be turned slightly to locate it in the actuator and pulled back to the
e. Fit the smaller O-ring into the groove on the underside of the bezel:-
initial position. The key can then be removed and the flap lowered.
i. Offer the O-ring up to the groove.
ii. Place thumbs of both hands side by side onto the O-ring
iii. Press the O-ring down into the groove circumference maintaining even pressure, forcing the O-ring
4.0 MAIntEnAncE
into the groove.
During the working life of the unit, it should require little or no maintenance. However, if abnormal or unusual
iv. The O-ring should be fully seated in the groove and not fall out when fitting the bezel to the cover.
environmental conditions occur due to plant damage or accident etc., then visual inspection is recommended.
v. Centralise the new glass element on the cover
If the unit requires cleaning, then only clean exterior with a damp cloth to avoid electro-static charge build up.
f. Place the new glass element into position on the cover and assemble the bezel over the top of the glass
If a unit fault should occur, then the unit can be repaired by MEDC. All parts of the unit are replaceable.
element.
If you acquired a significant quantity of units, then it is recommended that spares are also made available.
g. Ensure the glass element stays central on the cover by holding down the glass with thumb through the
Please discuss your requirements with the Technical Sales Engineers at MEDC.
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.
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SM87PB GEnErAL ArrAnGEMEnt
SM87BG GENERAL ARRANGEMENT
© Cooper MEDC 2010