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SERIES 3000 MKIII TECHNICAL MANUAL
6. Electrical connections
Prior to installation refer to the transmitter control drawing 3000G3303 and remote sensor control
drawing 3000E3157 shown in section 21.
Series 3000 MkIII is designed for intrinsically safe installation and use in Zone 0 or 1 or 2 or 20 or 21 or 22
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hazardous areas in Europe, and hazardous locations Class I, Divisions 1 & 2, Groups A, B, C & D; Class II,
Divisions 1 & 2, Groups E, F & G application in North America.
Installation must be in accordance with the recognized standards of the appropriate authority in the
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country concerned.
Use copper wiring only.
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Access to the interior of the detector, when carrying out any work, must only be conducted by trained
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personnel.
Before carrying out any work ensure local regulations and site procedures are followed. Appropriate
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standards must be followed to maintain the overall certification of the detector.
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For intrinsically safe installation, to maintain intrinsic safety, the transmitter wiring must be routed through
a galvanic isolator or zener diode barrier which meets the entity parameters indicated in the control
drawing 3000G3303. The selected barrier shall be approved with intrinsically safe circuits for the
hazardous location class and group as appropriate for the application. The cable capacitance plus the
transmitter capacitance (Ci) must be less than or equal to the Ca (or Co) on the barrier. The cable
inductance plus the transmitter inductance (Li) must be less than or equal to the La (or Lo) on the barrier.
The barrier must be located in the non-hazardous area.
All intrinsically safe wiring shall be kept separate from non-intrinsically safe wiring. Terminate barrier earth
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ground to the ground bus of the power distribution panel (controller). Resistance to ground must not be
greater than 1.0 ohm.
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Electrical apparatus connected to an intrinsically safe system must not use or generate more than 250V
(Vrms) with respect to earth ground.
Installation must be in accordance with the barrier manufacturer's instructions and with article 504/505 in
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the national electric code, ANSI/NFPA 70 and/or Canadian electrical code section 18.
To reduce risk of ignition of hazardous atmospheres, conduit runs must have a seal fitting connected
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within 18 inches of the enclosure.
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To reduce the risk of ignition of hazardous atmosphere, de-classify the area or disconnect the equipment
from the supply circuit before opening the detector enclosure. Keep assembly tightly closed during
operation.
Never attempt to open a junction box / enclosure in potentially hazardous atmospheres.
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The detector must be earthed / grounded for electrical safety and to limit the effects of radio frequency
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interference. An earth / ground point is provided inside and outside the unit. The internal grounding shall
be used as the primary equipment ground. The external terminal is only a supplemental bonding
connection where local authorities permit or require such a connection.
Take care when handling sensors as they may contain corrosive solutions.
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Do not tamper or in any way disassemble the sensor.
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Do not expose to temperatures outside the recommended range.
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Do not expose sensor to organic solvents or flammable liquids.
At the end of their working life, sensors must be disposed of in an environmentally safe manner. Disposal
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should be according to local waste management requirements and environmental legislation.
Alternatively, sensors may be securely packaged and returned to Honeywell Analytics clearly marked for
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environmental disposal.
WARNINGS
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MAN0917_Issue 6_08/2015
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