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DOLPHIN LM/LT Liquid Ring Vacuum Pumps LM 0100 A, LM 0180 A, LM 0270 A, LM 0530 A, LM 0800 A, LT 0130 A, LT 0170 A, LT 0220 A, LT 0320 A, LT 0430 A, LT 0510 A, LT 0630 A, LT 0750 A Instruction Manual 0870206545 | -0003_en-US | Original instructions 8/18/2022...
Table of Contents Table of Contents Safety..................................Product Description ............................. Operating Principle ............................. Intended Use ............................... Start Controls ............................... Variants................................. 2.4.1 LM Series ..............................2.4.2 LT Series ..............................2.4.3 VL System ............................... Transport ................................Storage .................................. Short Term (Up to 3 Months) ..........................Medium Term (3 Months to 6 Months)......................
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.
ATEX supplement for additional safety information on operation in hazardous zones. Conveying of other media leads to an increased thermal and/or mechanical load on the machine and is permissible only after a consultation with Busch. The machine is intended for the placement in a non-potentially explosive environment unless a "Ex(outside)"...
2 | Product Description The machine is suitable for continuous operation. Permitted environmental conditions, see Technical Data [➔ 30]. Start Controls The machine comes without start controls. The control of the machine is to be provided in the course of installation. Variants 2.4.1 LM Series...
Transport | 3 Transport WARNING Suspended load. Risk of severe injury! ● Do not walk, stand or work under suspended loads. ● To find out the weight of the machine, refer to the chapter Technical Data [➔ 30] or the name- plate (NP).
● Drain the operating liquid from the machine and the system before storage. ● Or add an anti-freeze solution. After testing, all Busch DOLPHIN vacuum pumps are vented and drained. Pumps containing ferrous materials are preserved using a combined VPI (Vapor Phase Inhibitor) and Contact Inhibitor Oil (Va- porol™...
● Make sure that the coupling is correctly aligned, see Fitting the Coupling [➔ 14]. If the machine is installed at an altitude greater than 1000 meters above sea level: ● Contact your Busch representative, the motor should be derated or the ambient temperature limited.
● Make sure that the line size of the connection lines over the entire length is at least as large as the connections of the machine. In case of long connection lines it is advisable to use larger line sizes in order to avoid a loss of effi- ciency. Seek advice from your Busch representative. 5.2.1 Suction Connection NOTICE Ingress of foreign objects.
Installation | 5 5.2.3 Operating Liquid Connection The machine cannot be operated without an operating liquid system. The following diagrams show examples of typical installations. The actual scope of delivery is always contractually agreed upon. If the machine is equipped with a VL System (see reference on the nameplate): ●...
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5 | Installation 5.2.3.1 Once-Through Operation / No recovery Description Process inlet (IN) Gas discharge (OUT) Operating liquid inlet (OPI) Continuous flow liquid system does not recover the operating liquid which flows out with the dis- charge gases. 5.2.3.2 Partial Recovery (Open Circuit) Description Process inlet (IN) Gas discharge (OUT)
Max. allowable kinematic viscosity Consider the motor power for any- thing other than water - consult Busch. Max. allowable particle size 0.1* * For all operating systems make sure that no particles with a diameter larger than 0.1mm will intrude the machine, neither via the process gas nor via the operating liquid.
5 | Installation The table below lists the recommended maximum levels of soluble compounds for use with ma- chine in cast iron construction. Calcium carbonate mg/l (ppm) < 300** PH value 6.5 … 9.5 Chloride mg/l (ppm) < 700 Sulphates mg/l (ppm) <...
Installation | 5 Bolt Setting By design, two of the bolt heads on the non-drive end bearing cap do not sit flush with the outer surface. This is normal for this machine type and the bolt heads are covered with plastic caps. CAUTION Bolt heads with plastic caps.
● Make sure that the motor of the machine will not be affected by electric or electro- magnetic dis- turbance from the mains, if necessary seek advice from Busch. ● Make sure that the EMC of the machine is compliant with the requirements of your supply net- work system, if necessary provide further interference suppression (EMC of the machine, see EU Declaration of Conformity [➔ 35] or UK Declaration of Conformity [➔ 36]).
● If the machine is equipped with a power connector, install a residual current protective device to protect persons in case of isolation default. ● Busch recommends installing a type B residual protective device suitable for the electrical in- stallation.
6 | Electrical Connection Wiring Diagram Three-Phase Motor NOTICE Incorrect direction of rotation. Risk of damage to the machine! ● Operation in the wrong direction of rotation can destroy the machine in a short time! Prior to start-up, ensure that the machine is operated in the right direction. NOTICE Incorrect direction of rotation.
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Electrical Connection | 6 Delta connection (low voltage): Star connection (high voltage): Double star connection, multi-voltage motor Star connection, multi-voltage motor with 9 with 9 pins (low voltage): pins (high voltage): Double star connection, multi-voltage motor Star connection, multi-voltage motor with 12 with 12 pins (low voltage): pins (high voltage): Delta connection, multi-voltage motor with 12...
7 | Commissioning Commissioning CAUTION During operation the surface of the machine may reach temperatures of more than 70°C. Risk of burns! ● Avoid contact with the machine during and directly after operation. NOTICE The machine is running without operating liquid system. Will ruin the machine in short time! ●...
Commissioning | 7 Preventing Cavitation NOTICE Cavitation. Risk of damage to the machine! If you hear crackling noise: ● Control the pressure. At very low pressures and sufficiently high temperatures the operating liquid can locally transfer in- to the vapor phase, creating bubbles within the operating liquid. As the pressure rises towards the outlet slot the bubbles collapse.
8 | Maintenance Maintenance DANGER Live wires. Risk of electrical shock. ● Electrical installation work must only be executed by qualified personnel. WARNING Machines contaminated with hazardous material. Risk of poisoning! Risk of infection! If the machine is contaminated with hazardous material: ●...
If an inlet screen is installed: ● Check it and clean if necessary. Every 5 years ● Have a major overhaul (contact Busch). * For DOLPHIN LM 0800 A, LT 0630-0750 A only. Smaller DOLPHIN LM/LT use bearings which are greased for life.
● Decontaminate the machine as much as possible and state the contamination status in a ‘Dec- laration of Contamination’. Busch will only accept machines that come with a completely filled in and legally binding signed ‘Declaration of Contamination’ (form downloadable from www.buschvacuum.com).
Decommissioning | 10 Decommissioning DANGER Live wires. Risk of electrical shock. ● Electrical installation work must only be executed by qualified personnel. CAUTION Hot surface. Risk of burns! ● Prior to any action requiring touching the machine, let the machine cool down first. ●...
Use of non-Busch genuine spare parts. Risk of premature failure! Loss of efficiency! ● The exclusive use of Busch genuine spare parts and consumables is recommended for the correct functioning of the machine and to validate the warranty. Spare parts kit Description Part no.
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2x o-ring (PTFE/Viton) 1x flat seal washer (PTFE) ® 2x mechanical seal (Chemraz 1x locknut M45 3x oil seal If other parts are required: ● Contact your Busch representative. Instruction Manual DOLPHIN LM 0100-0800 A, LT 0130-0750 A_EN_en 27 | 40...
Solid foreign matter has en- ● Remove the solid foreign tered the machine. matter or repair the ma- chine (contact Busch). ● Install an inlet screen if nec- essary. Ice in the machine, the operat- ● Carefully warm up the ma- ing liquid has frozen.
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● Check the direction of rota- direction. tion, see Wiring Diagram Three-Phase Motor [➔ 18]. Defective bearings. ● Repair the machine (contact Busch). The vacuum pump cavitates ● Consult the chapter Prevent- (periodic formation and col- ing Cavitation [➔ 21]. lapsing of steam bubbles in the ●...
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