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Installation
December 2020
3. Seal the terminal compartment with two O-rings to prevent water ingress.
4. Connect cable shield to instrument earth in the control room only unless extra radio
22
WARNING
Ensure cable entry is via suitable hazardous area approved and ingress
protection certified cable glands (customer supplied) or conduit.
The ATEX/IECEx approved GDU-Incus has two positions for M20 cable glands,
while the FM approved detector has one position for ¾-in. national pipe thread
(NPT) conduit.
Fit cable glands and conduit in accordance with manufacturers' instructions for
assembly to a certified flame-proof enclosure.
Seal all unused cable entries with a flame-proof certified plugging device.
Ensure all cable gland and plugging devices are ingress protected to the same
standard as the enclosure to maintain certification and are suitable for the size
of the cable used.
If the detector is to be installed in an ATEX Zone 1 Hazardous Area, use an Exd
barrier seal.
Seal all FM approved detectors (US and Canada) within 18 in. (457.2 mm) of
enclosure entry using a suitably rated conduit seal.
NOTICE
The terminal cover label specifies thread size for cable entry. See
information.
Before closing, Emerson recommends visually inspecting the detector to ensure the
O-rings are in place and undamaged. Also check the flame paths of the terminal
cover and main enclosure for signs of damage. See
path positions.
frequency interference (RFI) protection is required and all local and site grounding
regulations are met, in which case, terminate the shield to local ground via one of
the internal earth points shown in
Figure 2-9
Figure
2-10.
Reference Manual
00809-0100-3003
Marking
for further
for O-ring and flame
GDU-Incus
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