ES-817 Rev. D
Copyright 2020. This document and all information herein are the property of Dresser LLC
Page 4 of 14
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Requirements for All Installations
Installation and maintenance must be performed only by qualified personnel. Area Classification,
Protection Type, Temperature Class, Gas Group, and Ingress protection must conform to the data
indicated on the label as well as within this document.
Wiring and conduit must conform to all local and national codes governing the installation. Wiring must
be rated for at least 5°C above the highest expected ambient temperature
.
(ATTENTION – LE CABLAGE D'ALIMENTATION DOIT ETRE ÉVALUÉ POUR UNE TEMPERATURE AU MOINS
5°C PLUS QUE LA TEMPERATURE AMBIANTE MAXIMALE)
SVI3 has been certified to a minimum ambient temperature of -55 °C, however, there are two
temperature models available, standard (-40 °C) and extended temperature range (-55 °C). For optimal
performance, the minimum ambient as marked on the label should be followed.
Where the protection type depends on wiring glands, the glands must be certified for the type of
protection required.
Under normal operation compressed supply gas is vented from the SVI3 to the surrounding area. If
natural gas is used as the supply gas additional precautions or specialized installations may be required.
Hazardous area consideration is the responsibility of the end-user. Area ventilation and other safety
measures may be required to maintain a safe environment.
Verify that the markings on the label are consistent with the application.
Verify that the air supply pressure cannot exceed the marking on the label.
The end-user shall permanently mark the serial plate as appropriate based on the protection type
chosen for the installation. The small circles next to the various groupings of protection types are
provided for this purpose. Once the type has been marked, it cannot be changed.
It must be ensured the thermal effect of the process temperature does not result in exceeding the SVI3
specified ambient temperature.
"X" Marking
- the SVI3 enclosure contains greater than 10% aluminum; care must be taken during
installation to avoid impacts or friction that could create an ignition source.
"X" Marking
- Potential Electrostatic Charge Hazard – For safe operation use only wet cloth when
cleaning or wiping device, and only when local conditions around the device are free of potentially
explosive atmospheres. Do not use dry cloth. Do not use solvent.
"X" Marking
- Instruments installed in dusty hazardous areas, Zones 20, 21 and 22; must be cleaned
regularly to prevent the buildup of dust layers on any surface. To avoid the risk from electrostatic
discharge, you must follow the guidance as detailed in IEC/TS 60079-32-1.
Before putting into service, all of the SVI3 covers should be securely fastened to the housing to maintain
ingress protection.
! WARNING!
Failure to adhere to the requirements listed in this document may cause loss of life and
property.
