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INSTALLATION <br />ROOTS- blowers & exhausters are treated after factory <br />assembly to protect against normal atmospheric <br />corrosion. The maximum period of internal protection <br />is considered to be one year under average conditions, <br />if shipping plugs & seals are not removed. Protection <br />against chemical or salt water atmosphere is not <br />provided. Avoid opening the unit until ready to start <br />installation, as corrosion protection will be quickly lost <br />due to evaporation. <br />If there is to be an extended period between installa- <br />tion and start up, the following steps should be taken <br />to ensure corrosion protection. <br />❑ Coat internals of cylinder, gearbox and drive end <br />bearing reservoir with Nox-Rust VCI-10 or <br />equivalent. Repeat once a year or as conditions <br />may require. Nox-Rust VCI-10 is petroleum <br />soluble and does not have to be removed before <br />lubricating. It may be obtained from Daubert <br />Chemical Co., 2000 Spring Rd., Oak Brook, III. <br />60521. <br />❑ Paint shaft extension, inlet and discharge flanges, <br />and all other exposed surfaces with Nox-Rust <br />X-110 or equivalent. <br />❑ Seal inlet, discharge, and vent openings. It is not <br />recommended that the unit be set in place, piped <br />to the system, and allowed to remain idle for <br />extended periods. If any part is left open to the <br />atmosphere, the Nox-Rust VCI-10 vapor will <br />escape and lose its effectiveness. <br />❑ Protect units from excessive vibration <br />during storage. <br />I❑ Rotate shaft three or four revolutions every <br />two weeks. <br />❑ Prior to start up, remove flange covers on both <br />inlet and discharge and inspect internals to insure <br />absence of rust. Check all internal clearances. <br />Also, at this time, remove gearbox and drive end <br />bearing cover and inspect gear teeth and bearings <br />for rust. <br />Because of the completely enclosed unit design, <br />location of the installation is generally not a critical <br />matter. A clean, dry and protected indoor location is <br />preferred. However, an outdoor location will normally <br />give satisfactory service. Important requirements are <br />that the correct grade of lubricating oil be provided for <br />expected operating temperatures, and that the unit be <br />located so that routine checking and servicing can be <br />performed conveniently. Proper care in locating driver <br />and accessory equipment must also be considered. <br />Supervision of the installation by a ROOTS Service <br />Engineer is not usually required for these units. <br />Workmen with experience in installing light to <br />medium weight machinery should be able to produce <br />satisfactory results. Handling of the equipment needs <br />to be accomplished with care, and in compliance with <br />safe practices. Unit mounting must be solid, without <br />strain or twist, and air piping must be clean, accurately <br />aligned and properly connected. <br />Bare -shaft Units: Two methods are used to handle <br />a unit without base. One is to use lifting lugs bolted <br />into the top of the unit headplates. Test them first for <br />tightness and fractures by tapping with a hammer. <br />In lifting, keep the direction of cable pull on these <br />bolts as nearly vertical as possible. If lifting lugs are <br />not available, lifting slings may be passed under the <br />cylinder adjacent to the headplates. Either method <br />prevents strain on the extended drive shaft. <br />Packaged Units: When the unit is furnished mounted <br />on a baseplate, with or without a driver, use of lifting <br />slings passing under the base flanges is required. <br />Arrange these slings so that no strains are placed on <br />the unit casing or mounting feet, or on any mounted <br />accessory equipment. DO NOT use the lifting lugs in <br />the top of the unit headplates. <br />Before starting the installation, remove plugs, covers <br />or seals from unit inlet and discharge connections <br />and inspect the interior completely for foreign material. <br />If cleaning is required, finish by washing the cylinder, <br />headplates and impeller thoroughly with a petroleum <br />solvent. Turn the drive shaft by hand to make sure <br />that the impellers turn freely at all points. Anti -rust <br />compound on the connection flanges and drive <br />shaft extension may also be removed at this time <br />with the same solvent. Cover the flanges until ready <br />to connect piping. <br />Mounting <br />Care will pay dividends when arranging the unit <br />mounting. This is especially true when the unit is <br />a "bare -shaft" unit furnished without a baseplate. <br />The convenient procedure may be to mount such a <br />unit directly on a floor or small concrete pad, but <br />this generally produces the least satisfactory results. <br />It definitely causes the most problems in leveling and <br />alignment and may result in a "Soft Foot' condition. <br />Correct soft foot before operation to avoid unnecessary <br />loading on the casing and bearings. Direct use of building <br />structural framing members is not recommended. <br />For blowers without a base, it is recommended that a <br />well anchored and carefully leveled steel or cast iron <br />mounting plate be provided. The plate should be at <br />©2002 Dresser, Inc. all rights reserved. <br />ROOTS, RAM, URAI and WHISPAIR are trademarks of Dresser, Inc. <br />Dresser Design and I IniversAl RAI Ara renislered trademarks of llrassar Inc <br />