Howden Roots Metric Series, Installation, Operation And Maintenance Manual

Page 1: ...n com Roots Universal RAI URAI DSL URAI G Metric Series Installation Operation Maintenance Manual www howden com Installation Operation and Maintenance Manual Roots Universal RAI URAI DSL URAI G Metri...

Page 2: ...d operation See SAFETY PRECAUTIONS Install all equipment correctly Foundation design must be adequate and piping carefully done Use recommended accessories for operating protection Make sure both driv...

Page 3: ...connections or taps for instruments thermometers and pressure or vacuum gauges at or near the inlet and discharge connections of the unit These along with a tachometer will enable periodic checks of o...

Page 4: ...sults Handling of the equipment needs to be accomplished with care and in compliance with safe practices Unit mounting must be solid without strain or twist and air piping must be clean accurately ali...

Page 5: ...nit is DIRECT COUPLED to its driver the driver RPM must be selected or governed so as not to exceed the maximum speed rating of the unit Refer to Table 1 for allowable speeds of various unit sizes A f...

Page 6: ...base so that 2 3 of the total movement is available in the direction away from the unit and mount the assembly so that the face of the sheave is accurately in line with the unit sheave This position...

Page 7: ...though WHISPAIR units operate at generally lower noise levels than conventional rotary blowers Specific recommendations on silencing can be obtained from your local Howden Roots distributor Discharge...

Page 8: ...dip into the main oil sumps causing oil to splash directly on gears and into bearings and seals A drain port is provided below each bearing to prevent an excessive amount of oil in the bearings Seals...

Page 9: ...ed by half or 3000 hours oil service life Normal life expectancy of petroleum based oils is about 2000 hours with an oil temperature of about 180 F 82 C As the oil temperature increases by increments...

Page 10: ...is restarted gradually close the discharge unloading valve to apply working pressure At this point it is recommended that a pressure gauge or manometer be connected into the discharge line if not alr...

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Page 12: ...idered expendable items to be replaced whenever drainage from the headplate vent cavity becomes excessive or when the blower is disassembled for any reason Some oil seal leakage may occur since an oil...

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Page 32: ...improve our products and services and for over 160 years our world has revolved around our customers This dedication means our air and gas handling equipment adds maximum value to your operations We h...