Medc BG Bedienungsanleitung PDF herunterladen (Seite 3)

English

These manual ﬁre alarm call points have been designed for use in ﬂammable atmospheres 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. INSTALLATION

General

The unit should not be installed where it may be subjected to mechanical and thermal stresses or where it may

be attacked by existing or foreseeable aggressive substances.

The unit has been designed such that:

s

    

s

havedangers.

When installing and operating explosion-protected equipment, requirements 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 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.

The unit should be mounted on a vertical surface using the four ﬁxing holes in the base.

MEDC recommend the use of M5 stainless steel screws.

Cable Termination

CAUTION: Before removing the cover assembly, ensure that the power to the unit is isolated.

Unscrew the 4 off captive screws holding the lid to the base.

Lift the lid away from the base.

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 manual 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 grounding connection and the external

terminal is for a supplementary bonding connection where local codes or authorities permit or require such a

connection.

3. OPERATION

The operating voltage of the unit is stated on the unit label.

1. INTRODUCTION

It DOES NOT give rise to physical injury or other harm due to contact.

It DOES NOT produce excessive surface temperature, infrared, electromagnetic or ionising radiation.

any non-electrical

It DOES NOT

MEDC recommend the use of a sealing compound such as HYLOMAR PL32 on the threads of glands and stopping

plugs in order to maintain the IP rating of the unit.

M5 (4.0mm A/F hexagon key)

Once termination is complete, carefully replace the lid back onto the base, avoiding damage to the mating

surfaces. Ensure the retaining strap is not trapped between the mating surfaces and that the O-ring is correctly

seated in its groove. Ensure the retaining strap and wires are clear of the microswitch actuator and operating

mechanism.

Tighten

the

off

(4.0mm

A/F

hexagon

key)

screws

evenly.

Please see the reference drawing supplied with each

unit for details of wiring and any fitted internal component values.

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