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6. Maintenance of Flame-proof Equipment
For maintenance of Flame-proof Equipment, please according to the following.
Details of maintenance, please conducted in accordance with national legislation of the country to be used.
(1) Maintenance
Flame-proof equipment shall not be maintenance with its power turned on.
Always check that there is no explosive gas or vapor in that location to remove the cover (Main
body cover or Terminal Box cover) of Flame-proof enclosure with the power on.
※Button Cover and Pilot case cover are not Flame-proof enclosure.
If it cannot be checked whether an explosive gas or vapor is present or not, note the following, no
matter the power is on or not.
When adjustment, be sure never to cause mechanical sparks with tools.
Operate the button with bare hands or with conductive gloves.
Be sure to keep the metal button cover closed except when operating buttons.
(2) Repair
If the Flame-proof equipment requires repair, turn off the power and transport it to a safety (non-
hazardous) location. For the Flame-proof equipment, the gaps and path lengths of joints and mating
surfaces, and mechanical strength of enclosures are critical factors in explosion protection. And the
Flame-proof joints are not intended to be repaired. Therefore, the parts (e.g. Glass in the main body
cover and terminal box) related to the frame-proof performance is prohibited disassemble. Because
there is the fear that cannot keep Flame-proof characteristics and specifications after reassembling it.If
any damage occurs (e.g. in threads, joints or mating surfaces, connections between the base and
terminal box, locking, external wiring connection), immediately stop using and contact us.
Before starting to service the equipment, be sure to check all parts necessary for retaining the
requirements for Flame-proof equipment.
(3) Prohibition of specification changes and modifications
Do not attempt to change specifications or make modifications involving addition of or changes in
external wiring connections.
(4) Cleaning
Always clean with a wet cloth, in order to minimize the risk from electrostatic discharge, on
maintenance, repair and etc.
Regardless of the presence of explosive gases or vapors, always use a damp cloth to clean the
translucent rubber button cover.
(5) Others
【TIIS Flame-proof】
The hexagon socket head cap screw must use what was paid from our company. Such as if it is lost,
please contact us.
【IECEx, ATEX, NEPSI, KOSHA Flame-proof】
The hexagon socket head cap screw must use the stainless steel material of property class “A2-70”.
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