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Net Safety Monitoring
F
I
IELD
NSTALLATION
WARNING:
Wiring codes and regulations may vary. Compliance with regulations
is the responsibility of the installer. Wiring must comply with
applicable regulations relating to the installation of electrical
equipment in a hazardous area. If in doubt, consult a qualified
official before wiring the system.
This equipment is only suitable for ATEX Category 2 (Zone 1)
locations.
Equipment must be installed in compliance with EN 60079-14.
The permanently connected cable need appropiate protection of the
free end of the cable. Use an ATEX certified Junction Box.
Do not open housing and expose electronics in a classified area .
(Do not open when an explosive atmosphere may be present)
Ensure area is de-classified prior to opening housing.
The parts of the bushing outside the flameproof enclosure have to be
protected from mechanical impact by means of Ex
components(e.g.Enclosure, Thread adapters, Conduit)
Wiring
For protection against line and extraneous transients, it is required to install
detector pig tail lead wires in a braided flexible conduit less than 5 feet in
length to the termination box. From the termination box to the power supply
the recommended detector cable is four conductor (or greater), shielded 18
AWG rated 300 V for distances up to 150 feet. When cable is installed in
conduit, the conduit must not be used to support wiring to any other
electrical equipment. Detectors can be located over 150 feet and up to 2000
feet, if 16 AWG shielded conductor is used. The maximum distance between
the detector and the power supply is limited by the resistance of the
connecting wiring, which is a function of the gauge of the wire being used.
MAN-0101 Rev 01 UVIRS-H2-A/H2-AR & UVIRS-H2-A-X/H2-AR-X
November 23, 2012
Refer to "Appendix C, Resistance Table (Ohms)". The unterminated wires
must be terminated in a suitable certified ATEX enclosure or fitting.
Grounding
An external ground is required. The flame detector must also be connected to
an ATEX certified junction Box to ensure adherence to safety conditions. If
the junction box is non-metallic, the external ground must be provided by
some other means.
S
EALING
Water-proof and explosion-proof conduit seals are recommended to prevent
the accumulation of moisture within the junction box. Seals should be
located as close to the device as possible and not more than 18 inches
(46 cm) away. Explosion-proof installations may require an additional seal
where conduit enters a non-hazardous area. When pouring a seal, use a fibre
dam to ensure proper formation of the seal. Seals should never be poured at
temperatures below freezing.
The jacket and shielding of the cable should be stripped back to permit the
seal to form around the individual wires. This will prevent air, gas and water
leakage through the inside of the shield and into the enclosure.
It is recommended that explosion-proof drains and conduit breathers be used.
Changes in temperature and barometric pressure can cause 'breathing' which
allows moist air to enter conduit. Joints are seldom enough to prevent
'breathing'.
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