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Howden Roots 412 HPT Installation, Operation & Maintenance Manual

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Roots
412 HPT Blower
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Installation Operation & Maintenance Manual

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Summary of Contents for Howden Roots 412 HPT

  • Page 1 Roots 412 HPT Blower ® Installation Operation & Maintenance Manual...

  • Page 2: Table Of Contents

    NOTE: Information in this manual is correct as of the date of publication. Howden reserves the right to make design or • Provide for adequate safeguards against accidents material changes without notice, and without obligation to make to persons working on or near the equipment similar changes on equipment of prior manufacture.

  • Page 3: Safety Precautions

    • Operating Limitations Temperature A Howden Roots blower must be operated within certain Blowers are approved only for installations where following temperature limits can be maintained in service. approved limiting conditions to enable continued satisfactory performance. Warranty is contingent on such operation.

  • Page 4: Installation

    Installation • Rotate shaft three to four revolutions every two weeks. Howden Roots blowers arrive without lubrication in the sump, • Prior to start up, remove flange covers on both inlet & discharge flanges and covers on vent opening and see lubrication section for details.

  • Page 5: Installation

    Bottom inlet, top discharge is standard orientation with CCW should be rated for the internal pressures being subjected rotation on input drive shaft. Blower can be mounted either during full operation. on roadside or curbside of truck chassis. Exact installation Insure that inlet and discharge piping are clear, clean and instructions cannot be given because of the variety of truck air tight.

  • Page 6: Operation

    Operation See Table 1, for maximum pressure limits when operating below maximum speed or above sea level conditions. Before operating blower under power for first time, recheck See Table 2, for unit internal clearances. the unit and the installation thoroughly to reduce the likelihood of avoidable troubles.
  • Page 7 Table 1, Maximum Allowable Operating Conditions Temperature rise Pressure Rise Vacuum Model Speed mbar ''Hg mbar 2000 22 (continuous) 1517 (continuous) 18 (continuous) 609 (continuous) 2000 25 (intermitten) 1725 (intermitten) 19 (intermitten) 643 (intermittent) NOTE: Limited to minimum 1600 RPM operation at 22 PSI continuous pressure, or 18'' Hg continuous vacuum at sea level conditions.

  • Page 8: Troubleshooting

    Troubleshooting Checklist Trouble Item Possible Cause Remedy No flow Speed too low Check by tachometer and compare with published performance. Wrong rotation Compare actual rotation with Figure 1, change driver if wrong. Obstruction in piping Check piping, valves, silencer to assure open flow path. Low capacity Speed too low See item 1, if belt drive, check for slippage and re-adjust...

  • Page 9: Inspection & Maintenance

    Inspection & Maintenance Oil seals should be considered expendable items, to be A good program of consistent inspection and maintenance is the most reliable method of minimizing repairs to a blower. replaced whenever drainage from the headplate vent cavity becomes excessive or when the blower is disassembled for A simple record of services and dates will help keep this work on a regular schedule.

  • Page 10: Parts List

    Item Part Number Description RC-204836023 GEAR HSG, BLIND END RC-204844023 IMP, DRIVE RC-204742020 SLEEVE, SFT 12283001 PISTON RING RC-204844S23 IMP, DRIVEN RC-204743020 SHIM, BRG 10009028 BEARING, DOUBLE ROW ANGULAR CONTACT 13309027 SEAL, CW 13309028 SEAL, CCW RC-204263021 CLAMP PLATE 13034016 SOCKET HEAD SCREW, M6-1x12 RC-204744020 SPACER, TIMING GEAR...

  • Page 11: Figures

    ISRB-2009, Rev. 02_17.
  • Page 12 ISRB-2009, Rev. 02_17.
  • Page 13 ISRB-2009, Rev. 02_17.
  • Page 14 ISRB-2009, Rev. 02_17.

  • Page 15: Outline Drawing

    ISRB-2009, Rev. 02_17.
  • Page 16 Howden Roots 900 W. Mount St. Connersville Indiana 47331 Tel: +1 765 827 9200 Web: www.howden.com ©Howden Group Limited. All rights reserved. 2017. ISRB-2009, Rev. 02_17. Howden and the flying H logo are registered trade marks belonging to Howden Group Limited.

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