Instruction Manual R 5 Oxygen Oil-Lubricated Rotary Vane Vacuum Pumps RA 0165 D, RA 0205 D, RA 0255 D, RA 0305 D Ateliers Busch S.A. Zone industrielle, 2906 Chevenez Switzerland 0870201428/-0003_en / Original instructions / Modifications reserved

Safety Prior to handling the machine, this instruction manual should be read and understood. If anything needs to be clarified, please contact your Busch representative. Read this manual carefully before use and keep for future reference. This instruction manual remains valid as long as the customer does not change anything on the product. The machine is intended for industrial use. It must be handled only by technically trained personnel. Always wear appropriate personal protective equipment in accordance with the local regulations. The machine has been designed and manufactured according to...

Suction connection Discharge connection Oil fill plug Oil sight glass Oil drain plug Eye bolt Gas ballast valve Air-oil heat exchanger Lead seal Demister MTB Motor terminal box DA Directional arrow EF Exhaust filter NP Nameplate OF Oil filter AF Axial fan OS Oil separator AOS Additional oil separator IF Inlet filter ± NOTE Technical term. In this instruction manual, we consider that the term 'machine' refers to the 'vacuum pump'.

The machine works on the rotary vane principle. The oil seals the gaps, lubricates the vanes and takes away compression heat. The oil filter cleans the circulating oil. Exhaust filters separate the oil from the discharged gas. 2.2 Application The machine is intended for the suction of air and other dry, non-aggressive, non-toxic and non-explosive gases. The oxygen version is especially designed for conveying gases with an increased oxygen content (volume content greater than 21% and up to 100%). Conveying of other media leads to an increased thermal and/or mechanical load on the machine and is...

2.4.2 Inlet Filter The inlet filter protects the machine against dust and other solids in the process gas. The inlet filter is available with a cartridge. The clamped design makes it easy to adjust the position to the installation and the o-ring sealing guaranties the tightness. 2.4.3 Additional Oil Separator It allows to trap and recover at the machine exhaust the smallest oil particles. The recovered oil is automatically re-injected in the machine. It is recommended to use it when the machine working pressure is higher than 100 hPa (mbar). 2.4.4 Water-oil Heat Exchanger In case of unfavourable...

A WARNING Suspended load. Risk of severe injury! • Do not walk, stand or work under suspended loads. In case the machine is already filled with oil. Tilting a machine that is already filled with oil can cause large quantities of oil to ingress into the cylinder. Starting the machine with excessive quantities of oil in the cylinder will immediately break the vanes and ruin the machine! • Drain the oil prior to every transport or always horizontally transport the machine. • Make sure that the eyebolt (EB) is in faultless condition, fully screwed in and tightened by hand. Machine weight: see the...

Storage • Seal all apertures with adhesive tape or reuse provided caps. Version with water-oil heat exchanger: • Make sure that the cooling water has been completely removed, see Decommissioning [► 27]. If the machine is to be stored for more than 3 months: • Wrap the machine in a corrosion inhibiting film. • Store the machine indoors, dry, dust free and if possible in original packaging preferably at temperatures between 5 ... 55 °C. Installation WARNING Lack of oxygen regulation knowledge. Risk of fire! • Installation, commissioning and maintenance must only be carried out by qualified personnel...

• Make sure that the environment of the machine is not potentially explosive. • Make sure that the ambient conditions comply with the Technical Data [► 31]. • Make sure that the environmental conditions comply with the protection class of the motor and the electrical instruments. • Make sure that the installation space or location is vented such that sufficient cooling of the machine is provided. • Make sure that cooling air inlets and outlets are not covered or obstructed and that the cooling air flow is not affected adversely in any other way. • Make sure that the oil sight glass (OSG) remains...

5.2.1 Suction Connection A WARNING Unprotected suction connection. Risk of severe injury! • Do not put hand or fingers in the suction connection. Ingress of foreign objects or liquids. Risk of damage to the machine! If the inlet gas contains dust or other foreign solid particles: • Install a suitable filter (5 micron or less) upstream from the machine. Connection size: - G2 Depending on the specific order, other connection dimensions may apply. If the machine is used as part of a vacuum system: • Busch recommends the installation of an isolation valve in order to prevent the oil from flowing...

CWI Cooling water inlet PS Pressure switch CWO Cooling water outlet WBV Water bypass valve WHE Water-oil heat exchanger WF Water filter TV Thermostatic valve The thermostatic valve (TV) is used to control the water flow in order to keep a stable machine temperature. The pressure switch (PS) is used to monitor the presence of water at the cooling system of the machine. When the pressure switch detects a pressure lower than 2 bar, the machine must be stopped. The water bypass valve (WBV) is used at the first machine start-up. At that moment it should be open (approx. 90 seconds) to prime the water...

• To reduce the maintenance effort and ensure a long product lifetime we recommend the following cooling water quality: Filling Oil A WARNING Fill the machine with wrong oil type. Risk of fire! i NOTE Water hardness unit conversion. 1 mg/l (ppm) = 0.056 °dh (german degree) = 0.07 °e (english degree) = 0.1 °fH (french degree) 5.3 • Only use oil approved by Busch and suitable for oxygen application, see Oil [► 32]. At delivery, the machine is already filled with specific oil "Busch YLC 250 B" which is suitable for oxygen application. A lead seal is applied on the oil fill plug (OFP) and the oil...