FHF ExResistTel IP2/IP154, Руководство по эксплуатации

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Manual ResistTel IP2 / IP152 Page 37
ExResistTel IP2 / IP154
Such unfavourable ambient conditions are:
o
Humidity of air too high (>75% rel., condensing)
o
Moisture and dust (pay attention to the degree of protection)
o
Flammable gases, vapours and solvents not covered by the type of
protection for the telephone.
o
Too high ambient temperatures (> +60°C).
o
Too low ambient temperatures (< -40°C).
•
During operation of the telephone the temperature must not exceed nor fall
below the prescribed range of ambient temperatures. It is not allowed to
operate the telephone with an additional cover.
•
Make sure the wiring is voltage-free upon connecting or disconnecting the
wires in the terminal room.
•
If electrical connections must be carried through in the hazardous area, the
enclosure must be opened and closed as follows:
o
Remove voltage from the device.
o
Loosen the fastening screws from the keypad insert.
o
Remove the keypad insert and unfasten the keypad cable.
o
Make the connections while the telephone is open.
o
When the work is done, plug the keypad back on, and place the keypad
insert back on the lower part of the telephone.
Make sure the seal is correctly positioned and in perfect working order. Then
tighten the fastening screws in a diagonal pattern.
•
Only blind plugs and cable glands as prescribed by the manufacturer may be
used.
Should these points not be observed, the explosion protection of the telephone
cannot be guaranteed. The telephone then poses a potential threat to the user’s life
and can cause the ignition of an explosive atmosphere.