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Страница 2: ... 1 Connecting the Switches 8 2 2 2 AC Power Source 10 2 3 Connecting the Cooling Water 11 2 4 Checking the Direction of Rotation 11 2 5 Connecting the Intake Line 12 2 6 Connecting the Exhaust Line 12 3 Operation 13 3 1 Start up and Operation 13 3 2 Shutdown 13 3 3 Storing and Shipping 13 4 Maintenance 15 4 1 Routine Maintenance 15 5 Troubleshooting 16 Note References to illustrations consist of f...
Страница 3: ...s or vapors oxidants or pyrophoric gases Electrical Safety Warning Disconnect the pump from the main power supply before beginning any assembly or disassembly work Take measures to ensure that the pump cannot be started The electrical con nections shall be made only by a qualified and licensed electrician in accordance with local codes DRYVAC2 is a registered trademark of Leybold Mechanical Safety...
Страница 4: ...bottom sketch the cycle has been completed and the inlet and outlet slots are closed Once the rotors have passed through the neutral position the cycle starts again Design There are four pumping stages 2 2 located one above the other The stages are pinned together The gas enters the pump through the intake port is pumped through four pump stages flows through an ex haust silencer 2 1 into the exha...
Страница 5: ...A 01 415 2 02 7 97 Section 1 Description Key to Figure 2 1 Exhaust silencer 2 Pump stages 3 Electric motor Figure 2 Sectional drawing of a DRYVAC2 100B the 25 50 B models are similar Figure 3 Simplified schematic of the DRYVAC2 B ...
Страница 6: ...ted to the plant s control equipment for the purpose of controlling the pump The DRYVAC2 B is equipped with two thermal switches that monitor pump temperature The first switch warns of an abnormally high temperature while the second switch signals that the temperature is too high for contin ued pump operation A third thermal switch monitors the pump s motor tem perature and opens if the motor temp...
Страница 7: ...pm 3000 rpm 3000 rpm 60 Hz operation 3600 rpm 3600 rpm 3000 rpm Noise level with the exhaust line connected 60 dB A 64 dB A 68 dB A Cooling water requirements approx at 5 bar 60 psig water pressure and 15ºC 59ºF water temperature 70 l hr 1 18 5 gal hr 180 l hr 1 48 gal hr 180 l hr 1 48 gal hr Maximum cooling water temp 25 ºC 77 ºF 25 ºC 77 ºF 25 ºC 77 ºF Cooling water pressure 2 10 bar 14 130 psig...
Страница 8: ... shall be effective even if there is a defect in the electrical system Caution Do not connect equipment to termi nals other the ones listed in the fol lowing instructions Failure to connect the switches as described may result in major dam age to the pump and lead to a loss of warranty Connect the switches to the plant control equipment as described below Connect a control voltage of 24 V max AC o...
Страница 9: ...9 DRYVAC2 25 50 100BManual GA 01 415 2 02 7 97 Section 2 Installation Figure 6 DRYVAC2 25 50 100 B Switch Connections ...
Страница 10: ... by first removing the four screws Figure 7 on the base of the pump and then removing the front panel 2 Change the connections on the terminals Figure 8 to match the applied AC line voltage and frequency 3 Replace the front panel Connect the pump s AC line cord to its rated AC voltage and frequency through a suitable circuit breaker see the DRYVAC2 nameplate Don t turn ON the breaker until all ele...
Страница 11: ...t cooling water will damage the pump Note Special modifications may be required when using deionized DI water Consult your Leybold sales or ser vice representative for information Note If you will be using a closed loop cooling system flush out the DRYVAC2 s cooling water to remove any re sidual rust before connecting the pump to your cooling system also add a rust inhibitor to the cooling water 2...
Страница 12: ...nd installing a valve between the pump and the vacuum chamber A RUVAC WS 151 or WS 251 roots pump can be con nected directly to the intake port of a DRYVAC2 25B A RUVAC WS 251 or WS 501 can be connected directly to the intake port of a DRYVAC2 50B or 100B Connect the intake line to the intake port use bellows to eliminate tension in the line Always install the supplied dirt trap in the intake flan...
Страница 13: ...d purge it with inert gas at a pressure of 1 000 mbar 760 Torr Refer Section 3 3 if the DRYVAC2 will be disconnected from the system 3 3 Storing and Shipping Shutdown the pump as described in Section 3 2 Warning During operation the pump s tem perature can exceed 100ºC 212ºF Always allow the pump to cool down before removing it from the system or before opening its housing Place drying canisters o...
Страница 14: ...ce by Leybold If you ship a pump to Leybold be sure to indicate whether the pump is free of substances that could be hazardous to health or if it is contaminated If it is contaminated indi cate the nature of the hazard You must complete the form at the back of this manual before sending any equipment to Leybold Attach the form to the pump or enclose it with the pump This state ment detailing the c...
Страница 15: ... inexperienced personnel may affect the life and performance of the pump and may void the warranty Warning During operation the pump s tem perature can exceed 100 C 212 F Always allow the pump to cool down before removing it from the system or before opening its housing Before doing any maintenance or repair shutdown the pump as described in Section 3 2 and disconnect it from the system Caution Al...
Страница 16: ...vice 2 4 1 4 Service 3 1 1 4 Service Service 2 3 Service Possible cause Recommended corrective action Symptom Refer ences This column refers to the section in the Operating instructions that contains the applicable repair information Section 5 Troubleshooting Motor circuit breaker is off Error in power connection See Symptom 2 3 or 4 below Pump has seized causing the motor circuit breaker to open ...
Страница 17: ...et value is 6 to 9 mm 1 4 to 3 8 inch for the 100B and 12 to 15 mm 1 2 to 5 8 inch for the 25 50B Repair the oil pump Replace malfunctioning part Modify the system Clean or modify the exhaust line Change site or supply cooler air Clean the ventilation grids and cooling air chan nels Increase the distance between the vent grids and the walls Change the connections in the motor junction box to match...
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