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of the Electrical Installation Code (version 6). The possible explosive areas of dust atmospheres of
the call point application are in accordance with the requirements of GOST IEC 60079-10-2-2013.
6.3.
Before mounting the call point, its visual inspection is necessary. Please check if the
casing is intact, and also check availability of the following: sealing elements of the cable glands
and the cover, explosion proofness marking and the warning ‘Unplug before opening’.
6.4.
No dents, mechanical damage and corrosion are allowed on explosion-proof surfaces of
units and parts to be disassembled.
6.5.
Power supply to the call point must be arranged in strict compliance with the effective
Manual for installation of the equipment of power supply and lighting circuits in explosive areas
VSN 332-74 and with this Operation Manual.
6.6.
In explosive areas, use of cables with polyethylene insulation or sheath is not allowed.
6.7.
Installation works must be carried out when power supply lines are disconnected. The
electrical connection diagram must comply with the Figures of Annex B.
6.8.
The call point body must be grounded by means of a copper wire with min. 1.5 mm
diameter. The grounding wire must have a reliable contact with the body and the grounding circuit.
6.9.
Sealing of cable in the input device socket must be performed with extreme care, since
explosion proofness of the input device depends on that.
6.10.
In case one input device only is used in the call point, vacant input device must be
plugged securely by means of the plug (Figure 2e, Annex A).
6.11.
Anti-corrosion heat resistant grease as per GOST 9433-80 must be restored on explosion-
proof surfaces of the cover and the body.
6.12.
The call point must be sealed after installation.
7.
SAFETY PROVISIONS
7.1.
Compliance with the safety rules is mandatory for safe operation and use of the call
points.
7.2.
Any works related to installation, inspection, maintenance and operation of the call points
must be only permitted to persons that have undergone the professional and safety trainings,
certification by the certifying board and have been acquainted with this operation manual.
7.3.
Any works related to maintenance of the call point in explosive area that involve opening
of its cover must be carried out after powering down the device.
7.4.
The call points are safe for the personnel during installation, repairs and routine work
both in good condition and in case of any possible malfunctions.
7.5.
Electric shock hazard protection of the call point corresponds to Class III as per GOST
12.2.007.0-75.
7.6.
Operators are responsible for work safety.
8.
PROCEDURE OF INSTALLATION AND OPERATION
8.1.
After receiving the call point, prepare the place of its operation, open the package, check
the scope of supply according to clause 3 of the technical certificate and the packing list. If the call
point was subjected to negative temperatures before opening the package, keep it at room
temperature for minimum four hours.
8.2.
Carry out visual inspection of the call point; make sure there are no visible mechanical
damages, and the explosion marking is available.
8.3.
Check the call point’s functionality, in order to do that:
a)
Establish the check circuit in accordance with Annex B in order to check the addressable
call point functionality. If necessary, connect the actuating relays R1 and R2 of the call point.
Exchange check software, for example, Lectus Modbus OPC/DDE server (v. 3.9 and above) or
Modbus Poll (v.5.0.1 and above), must be installed on the PC.
b)
Apply voltage to the call point.
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