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Det-Tronics R8471H Instructions Manual

Combustible gas controller
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Instructions
95-8475
Combustible Gas Controller
R8471H
1.1
5/07
95-8475

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Summary of Contents for Det-Tronics R8471H

  • Page 1 Instructions 95-8475 Combustible Gas Controller R8471H 5/07 95-8475...

  • Page 2: Table Of Contents

    Controller Front Panel ... . 12 CHARACTERISTICS Figure 10 R8471H Controller Flow Chart ..14 FACEPLATE DESCRIPTION ....12 Figure 11 Controller Dimensions in Inches OUTPUTS .

  • Page 3: Section I - Installation And Startup

    INSTRUCTIONS Combustible Gas Controller R8471H IMPORTANT Be sure to read and understand the entire instruction manual before installing, operating or servicing the gas detection equipment. WARNING Do not open the PointWatch junction box with power applied unless it is verified that no combustible gases or vapors are present.

  • Page 4: General Wiring Requirements

    Figure 3 shows the terminal configuration for the resistance. R8471H Controller. CONDUIT SEALS, DRAINS, AND BREATHERS Terminals 1 and 2 – 4 to 20 ma dc output. When installing the PointWatch in hazardous areas...
  • Page 5 CONTROLLER POSITIONS FOR DIM. (A) DIM. (B) DIM. (C) DIM. (D) DIM. (E) WEIGHT FLAME INCH INCH INCH INCH INCH 19.00 482.6 18.30 464.8 17.36 440.9 4.00 101.6 6.97 177.1 15.06 382.6 14.36 364.7 13.42 340.9 11.13 282.6 10.43 264.9 9.49 241.1 9.16...

  • Page 6: Figure

    18 to 32 vdc power OC = OPEN COLLECTOR OUTPUT (BASE MODEL ONLY) B1390 source. Figure 3—Terminal Configuration for R8471H Combustible Gas Controller Terminal 5 – Connect to the negative (-) side Programming” section of this of the dc power source.

  • Page 7: Typical Application

    (-) side of the power TYPICAL APPLICATION source for remote reset. Refer to Figure 7 for an illustration of an R8471H Terminals 9 and 10 – High Alarm Output. Controller wired to a PointWatch IR gas detector.

  • Page 8: R8471H Controller Wired To A Pointwatch Detector

    6. CABLE SHIELD WIRE IS TO BE CONNECTED TO TERMINAL NO. 3 AT R8471 BACKPLATE, WHICH IS THE CONTROLLER EARTH GROUND CONNECTION. Figure 7—R8471H Controller Wired to a PointWatch Detector Normally Open/Closed Relays pins. For normally open operation, place the plug on the NO and center pins.

  • Page 9: Installation Checklist

    SW1-1 CLOSED = LATCHING OPEN = NON-LATCHING SW1-2 CLOSED = NORMALLY ENERGIZED OPEN = NORMALLY DE-ENERGIZED INT = NON-ISOLATED EXT = ISOLATED HIGH ALARM AUXILIARY ALARM NORMALLY OPEN/CLOSED RELAY LOW ALARM CONTACTS FAULT A1392 Figure 8—Programming Jumper Plugs and Switches of system installation are complete and have been Normally Energized/De-Energized Relays performed correctly.

  • Page 10: Startup Procedure

    2. At the end of the two second interval, the Low SETPOINT ADJUSTMENT LED goes out, the High LED begins to blink, and The R8471H Controller has independent Low, High, the digital display shows the high alarm setpoint. and Auxiliary alarm setpoints, with corresponding outputs.

  • Page 11: Setpoint Adjustment Procedure

    50% LFL when a non-volatile memory and are retained in the PointWatch detector is used with the R8471H. event of a power loss. However, if power is interrupted while performing the Setpoint 5.

  • Page 12: Calibrating Pointwatch

    Table 2—System Status Codes STATUS CONDITION Initialization failure. (Subcodes are as follows.) EPROM sumcheck failure. Sensor failure during startup - current too high or too low. Watchdog timer failure. RAM failure. Internal 5 volt power supply failure during startup. External 24 volt power supply failure during startup. Controller type invalid.

  • Page 13: Calibrating The Controller

    CALIBRATING THE CONTROLLER 6. When the microprocessor has completed the Span adjustments (30 seconds minimum), the The R8471H Controller can be calibrated using either digital display stops flashing. of two methods: 7. Remove the calibration gas. When the gas level...

  • Page 14: Section Ii - Description And Operating Characteristics

    5. When no adjustments have been made for 7 seconds, the controller generates the current output level for the calibrate mode. This is DIGITAL DISPLAY ➀ indicated by a flashing CAL LED. Press the appropriate button to obtain the desired current ➂...

  • Page 15: Outputs

    5 seconds. The gas concentration at the sensor will be displayed during the remaining The R8471H Controller is available in a Base version time. If more than one fault should occur, the and a Premium version. The differences between the highest priority fault will be displayed.

  • Page 16: Reset

    PUSHED WITH ADJUST SET? CURRENT CALIBRATE A1957 Figure 10—R8471H Controller Flow Chart — All LEDs are off. In the Normal operating mode and a high alarm condition occurring: — Alarm outputs are in their normal state (energized or de-energized as programmed).

  • Page 17: Other Operating Modes

    When the Reset button is held for 0.5 second: OPERATING RANGE— 0 to 100% LFL. If an alarm or fault condition exists — the LEDs turn off and the outputs return to their normal condition SOLID STATE OUTPUTS (Base model only)— (forced reset).

  • Page 18: Section Iii - System Maintenance

    Remove power before removing the device from approved gas sensing device capable of generating a 4 to 20 ma input. FMA approval of the R8471H the mounting cage or plugging in the Combustible Gas Controller, however, does not replacement unit.

  • Page 19: Troubleshooting Guide

    Table 3—Troubleshooting Guide Problem Possible Cause No faceplate indicators 1. Wiring to external power source. illuminated. 2. Input power failure. FAULT LED on, digital 1. Power-up time delay (up to 5 minutes). display blank. 2. If condition continues after 5 minutes, repeat power-up. If problem con- tinues, replace controller.

  • Page 20: Device Repair And Return

    When ordering please specify: For assistance in ordering a system to meet the needs of a specific application, please contact: R8471H Combustible Gas Controller Specify base or premium model, 3U or 4U height. Detector Electronics Corporation 6901 West 110th Street...
  • Page 21 • Combustible Gas Performance verified for 0 to 100% LFL methane-in-air atmospheres per FM 6310/6320. NOTES: • The Model R8471H Combustible Gas Controller must be connected to an FM Approved stand alone 4-20 mA combustible gas detection transmitter. The transmitter must be calibrated according to the manufacturer’s instructions and the controller must be calibrated using the procedure described in this manual.
  • Page 22 • Combustible Gas Performance verified for 0 to 100% LFL methane-in-air atmospheres per CSA C22.2 #152. NOTES: • The Model R8471H Combustible Gas Controller must be connected to a CSA Certified stand alone 4-20 mA combustible gas detection transmitter. The transmitter must be calibrated according to the manufacturer’s instructions and the controller must be calibrated using the procedure described in this manual.
  • Page 23 APPENDIX C – CE MARK 95-8475...

  • Page 24: Fault Record Sheet

    Fault Record Sheet Detector Date Time System Status Operator Comments Affected 95-8475...

  • Page 25: Recommended Test Form

    Recommended Test Form Detector Detector Date Date Date Number Location Installed Checked Calibrated Remarks 95-8475...
  • Page 26 Safety System Det-Tronics, the DET-TRONICS logo, Eagle Quantum Premier, and Eclipse are registered trademarks or trademarks of Detector Electronics Corporation in the United States, other countries, or both. Other company, product, or service names may be trademarks or service marks of others.

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