MEDC PH1 Manuel Technique page 2

English
1. INTRODUCTION
These manual fire alarm pull stations have been designed for use in hazardous locations and harsh environmental
conditions. The GRP enclosures are suitable for use offshore or onshore where light weight combined with a high
level of corrosion resistance is required
2.0 INSTALLATION
General
When installing and operating explosion-protected equipment, requirements for selection, installation and
operation should be referred to eg. IEC / BS EN60079-14, IEE Wiring Regulations and the `National Electrical
Code' in North America. Additional national and/or local requirements may apply.
The pull station should not be mounted closer than 30mm to any solid object which does not form part of the
unit.
Ensure that all nuts, bolts and fixings are secure.
Ensure that only the correct listed or certified stopping plugs are used to blank off unused gland entry points and
that the NEMA/IP rating of the unit is maintained. We recommend the use of `HYLOMAR PL32 Compound' on
the threads of all stopping plugs and glands in order to maintain the IP rating of the unit.
The pull station is mounted via the 4 off Ø 6.5mm fixing holes. The fixing holes have been designed to accept
an M6 screw or bolt.
MEDC recommend the use of stainless steel screws.
The unit has been designed and certified to operate at any attitude
Cable Termination
CAUTION: Before removing the cover assembly, ensure that the power to the unit is isolated and gas and/or
dust atmospheres are not present.
NOTE: For standard wiring options, see following page
Unscrew the 4 off M6 screws (5.0mm A/F hexagon key) holding the cover assembly to the base. Cover screws
are retained in cover assembly for ease of installation.
Gently lift the cover assembly away from the base of the enclosure to gain access to the interior
Cable termination should be in accordance with specifications applying to the required application. MEDC
recommends that all cables and cores should be correctly identified. Please refer to the wiring diagram provided
with the product.
Ensure that only the correct listed or certified 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 pull station and integrated with the
unit such that this rating is maintained.
The internal earth terminal, where fitted, must be used for the equipment grounding connection.
Once termination is complete, carefully lower the cover assembly back onto the base, avoiding damage to the
mating surfaces. Ensure the o-ring is correctly seated in its groove during re-assembly. Evenly tighten the 4 off
cover screws (5.0mm A/F hexagon key). Ensure the required gap (0.10mm Max.) is maintained between the
cover and the base.
08/11 © Cooper MEDC 2011