Honeywell Enraf 854 ATG Installation Manual Download Page 13 | Manualshive

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Honeywell Enraf 854 ATG Installation Manual Download Page 13

Electrical installation

Installation guide 854 ATG

Page 13

Grounding

The 854 ATG housing should be properly grounded to the ground reference (generally the tank).
This is a safety grounding requirement. Grounding can be performed by copper strips across the
flanges (refer to section Grounding at mechanical installation), or by a ground wire.
With last mentioned method, use one of the external ground terminals of the 854 ATG.

Note:

Grounding shall be performed in accordance with local regulations.

Caution

Safety depends on proper grounding. Check the resistance of the ground connection

directly after installation. The measured ground resistance shall be below the maximum

prescribed by local grounding requirements.

Warning

When measuring the ground resistance, use a suitable explosion-proof tester.

Lay-out terminal compartment

The terminal compartment on top of the 854 ATG is divided into a non-intrinsically safe and an
intrinsically safe part. Cable entries are

:@

NPT.

Figure 7

Location of 854 terminal compartment

The non-intrinsically safe cabling may only enter at the two right hand side cable entries (figure 7).

Warning

Only open the terminal compartment cover (top cover) when the power is switched off.

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Summary of Contents for Enraf 854 ATG

Page 1: ... Installation guide 854 Advanced Technology Gauge July 2008 Part no 4416 225 Rev 6 Enraf B V P O Box 812 2600 AV Delft Netherlands Tel 31 15 2701 100 Fax 31 15 2701 111 E mail enraf nl honeywell com Website http www honeywellenraf com ...

Page 2: ...ts The mechanical and electrical installation shall only be carried out by trained personnel with knowledge of the requirements for installation of explosion proof equipment in hazardous areas The information in this installation guide is the copyright property of Enraf B V Netherlands Enraf B V disclaims any responsibility for personal injury or damage to equipment caused by Deviation from any of...

Page 3: ...tions for the 854 ATG are ambient temperature 40 to 65 C 40 to 149 F operating pressure max 6 bar for medium pressure and chemical version max 40 bar max 25 bar in acc to PED for high pressure version relative humidity 0 100 ingress protection IP65 NEMA 4 suitable for outdoor installation The drum compartment which is in contact with the tank atmosphere is separated from electronic compartment A m...

Page 4: ...g tools and explosion proof testers Make sure no dangerous quantities of combustible gas mixtures are present in the working area Never start working before the work permit has been signed by all parties Pay attention to the kind of product in the tank If any danger for health wear a gas mask and take all necessary precautions Safety conventions AWarnings ACautions and ANotes are used throughout t...

Page 5: ... system Caution The box in which the 854 arrives also contains the measuring drum This is a precision measuring device and shall only be installed by a qualified commissioning engineer Accurate measurement requires an undamaged and clean drum Figure 1 Motor un locking Special tools Screw driver for Hex Allen key screws M4 length min 22 mm Part No 2998 506 Tommy bar Part No 2998 026 ...

Page 6: ...face flange Select gasket that is suitable for flange type maximum pressure and product to be stored Mount instrument flange horizontally Warning Verify that tank or drum compartment is depressurized before opening the tank or drum compartment cover of 854 ATG The 854 ATG can be adapted to various process connection flanges via adapters calibration chambers as specified in Appendix B Verify that m...

Page 7: ...n one of the following two ways Figure 2 Orientation of the gauge on a tank top view On a stilling well or guide pole the orientation of the gauge may be chosen freely Note The weight of the 854 ATG for medium pressure version is 16 kg 35 lbs chemical version is 21 kg 46 lbs high pressure version is 26 kg 57 lbs ...

Page 8: ...3 4 x 3 1 4 M20 x 80 6 300 lbs 12 3 4 x 4 M20 x 100 Bolt dimensions acc to DIN 2527 ANSI B16 5 are given in the table Mounting a pressure gauge set 1 Connect T piece horizontally to drum house 2 Check whether manometer is suitable for the maximum pressure in the tank 3 Mount manometer and vent valve figure 3 4 Close vent valve 5 Gently open valve between tank and drum compartment and check for lea...

Page 9: ...opper strip under one of the flange bolts for each flange Place shark rings between flange and strip figure 4 Figure 4 Example of flange ground Note Also in case of tanks with cathodic protection the 854 ATG must be grounded to the tank Cathodic protection can be maintained by isolating the cable screen armouring or conduit ...

Page 10: ...n the power Figure 5 Blocking sealing facilities Caution Before opening the electronic and terminal compartment cover remove the optional blocking devices which locks the covers A for electronic compartment cover and terminal compartment cover B for drum compartment cover Caution Do not damage the thread of the covers and instrument and keep the thread free of dirt After opening grease it lightly ...

Page 11: ...quency 50 to 60 Hz 10 Imax 2 A Install an explosion proof mains switch in the Figure 6 Voltage selector mains supply cable to each 854 ATG Specify which switch you need to operate the 854 ATG Note For 240 V supply voltage set the voltage selector to 230 V Supply voltage may then vary from 10 to 20 To change voltage setting proceed as follows 1 Check the local mains voltage 2 Open electronic compar...

Page 12: ...tion label of the 854 ATG to determine which type of cable glands is required Note Mount the glands according to the supplier s instructions Conduit If the 854 ATG is installed in a hazardous area threaded rigid metal conduit or threaded steel intermediate metal conduit shall be used Note If the 854 ATG is installed in a hazardous area stopper boxes must be applied within 18 inches 0 45 m from the...

Page 13: ... Safety depends on proper grounding Check the resistance of the ground connection directly after installation The measured ground resistance shall be below the maximum prescribed by local grounding requirements Warning When measuring the ground resistance use a suitable explosion proof tester Lay out terminal compartment The terminal compartment on top of the 854 ATG is divided into a non intrinsi...

Page 14: ...e one cable Mind the isolation voltage of the cores in the cable refer to the International Standard IEC 61010 1 Note If a quad cable is used and all four cores are twisted together use two opposite cores for Honeywell Enraf field bus lines and the two others for mains Relay output Option The relay output contacts are potential free Contact rating Umax 50 Vac or 75 Vdc Imax 3 A non inductive CSA o...

Page 15: ... required The power rating of the external resistor depends on the value of the resistor We recommend 1 W kΩ Figure 9 Selecting the external loop resistor Optional RS communication connections For the cable connections of the mains and the alarm contacts refer to previous section Caution Keep the RS 232C RS 485 lines as short as possible RS 232C Cable requirements maximum length 15 metres 50 ft tw...

Page 16: ... cable gland at both ends of the cable Device Cable requirements Spot temperature element Shielded Rmax 12 Ω line Average temp element Twisted pair and shielded Rmax 25 Ω line combined water probe Wiring between the 854 ATG and 762 VITO must be protected with EMC shielded conduit Same conditions for connection to 862 MIR Pressure transmitters Twisted pair and shielded Rmax 25 Ω line only pressure ...

Page 17: ... Fieldbus Requires external supply 9 24 Vdc Nominal current 11 mA Maximum current startup 16 70 mA Water bottom probe Twisted pair and shielded Rmax 25 Ω line no VITO water sensor only with HART 7 protocol Note If also pressure transmitters are connected use a junction box for parallel connection of the pressure transmitters and water bottom probe Figure 11 Intrinsically safe option connections ...

Page 18: ...Appendix Page 18 Installation guide 854 ATG Appendix A Dimensions 854 ATG medium pressure and chemical version ...

Page 19: ...Appendix Installation guide 854 ATG Page 19 Dimensions 854 ATG high pressure version ...

Page 20: ...Appendix Page 20 Installation guide 854 ATG Appendix B Available adapters calibration chambers ...

Page 21: ...ircuit for 977 TSI Max values U 21 V I 395 mA P 1 41 W Max permissible ext inductance 0 8 mH Max permissible ext capacitance 1 27 µF HCU option board EEx ia IIB Spot temperature input circuit Max values U 23 1 V I 221 mA P 0 19 W Max permissible ext inductance 3 5 mH Max permissible ext capacitance 980 nF HART input 1 circuit for 762 VITO Interface Max values U 23 1 V I 90 mA P 0 52 W Max permissi...

Page 22: ...terface 764 765 or 766 VITO temperature and or water sensor Installation guide 977 Tank Side Indicator Instruction manual XPU 2 option RS 232C RS 485 Instruction manual Temperature Water bottom and Analog output options Instruction manual HIMS HTG and vapour pressure P3 measurement Instruction manual Foundation Fieldbus Interface Instruction manual 847 PET Installation info 003 Installation of Pre...

Page 23: ...Notes Installation guide 854 ATG Page 23 ...

Page 24: ...1 100 E mail enraf nl honeywell com Webiste www honeywellenraf com PO Box 812 2600 AV Delft The Netherlands We at Honeywell Enraf are committed to excellence Information in this publication is subject to change without notice Enraf is a registered trade mark Enraf B V Netherlands ...

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