MEDC SM87PB - Manual (Page 2)

1. INTRODUCTION
These fire alarm call point units have been designed for use in harsh environmen-
tal conditions.
2. INSTALLATION
General
When installing and operating explosion-protected electrical equipment, require-
ments for selection, installation and operation should be referred to eg. IEC
60079-14 worldwide and the ‘National Electrical Code’ in North America.
Additional national and/or local requirements may apply.
Ensure that all nuts, bolts and fixings are secure.
Ensure that only the correct UL listed stopping plugs are used to blank off unused
gland entry points and that the NEMA/IP rating of the unit is maintained.
The SM87PBL is mounted via 4 x Ø 0.354” (9mm) fixing holes in the base.
The fixing holes have been designed to accept an M8 caphead screw or bolt.
MEDC recommend the use of stainless steel screws.
Cable Termination
Unscrew and remove the 4 off screws holding the cover assembly to the base.
Keep in a safe, accessible location.
Twist the cover assembly gently clockwise and anti-clockwise, whilst pulling it
away from the base. Remove to gain access to the interior of the base.
Cable termination should be in accordance with specifications applying to the
application. MEDC recommend that all cables and cores should be fully
identified.
Ensure that only correct UL Listed cable glands are used and that the assembly is
shrouded and correctly earthed.
All cable glands should be of an equivalent NEMA/IP rating to that of the call
point and integrated with the unit such that this rating is maintained.
The internal earth terminal (where fitted), must be used for the equipment ground-
ing connection and the external terminal is for a supplementary bonding connec-
tion where local codes or authorities permit or require such a connection.
Once termination is complete, carefully push the cover assembly back onto the
base, avoiding damage to the mating surfaces. Replace the 4
off screws into the
holes in the cover assembly and tighten evenly, to ensure maintenance of the
required gap between the cover & base.
11/14 © MEDC 2014