MEDC HD1 Range User Manual

Page 2

02/05

1.0 INTRODUCTION

The HD1 heat Detector has been designed for use in ﬂammable atmospheres and

harsh environmental conditions. The Glass Reinforced Polyester is suitable for use

offshore or onshore, where light weight combined with corrosion resistance and

strength is required.

2.0 INSTALLATION

The Heat Detector is mounted via 4 x Ø

” (7mm) ﬁxing holes in feet on the base

of the unit.
The ﬁxing holes have been designed to accept a ¼” (M6) caphead screw or bolt.
MEDC recommend the use of stainless steel fasteners.
The Heat Detector will operate in any attitude

2.1 Removing the Cover

Unscrew the 4 x M5 cover ﬁxing screws and lift the cover clear of the enclosure.
See 2.2 Cable Termination.
After cable termination has been completed the cover can be replaced and secured

to the enclosure.

2.2 Cable Termination

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 the correct certiﬁed glands are used and that the assembly is

shrouded and correctly earthed.
All cable glands should be of an equivalent IP rating to that of the Heat Detector.
In order to maintain the IP rating, the glands should be sealed to the Heat Detector

using a sealing washer or sealing compound.
The internal earth terminal must be used for the equipment grounding connection.

2.3 General

When installing and operating explosion-proof electrical equipment, the relevant

national regulations for installation and operation (e.g. EN60079-14 and IEE Edition

Wiring Regulations) must be observed.
Ensure that all nuts, bolts and ﬁxings are secure.
Ensure that only the correct certiﬁed stopping plugs are used to blank off unused

gland entry points. We recommend the use of ‘HYLOMAR PL32 COMPOUND’ on

the threads of the stopping plugs in order to maintain the IP or NEMA rating of the

unit.