BUSCH DOLPHIN LR 0110 A User manual

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Instruction Manual
DOLPHIN
Liquid Ring Vacuum Pumps
LR 0110 A, LR 0140 A, LR 0210 A, LR 0300 A
LR 0420 A, LR 0580 A
21/04/2021
Busch GVT Ltd.
Unit A, Westmere Drive
Crewe, Cheshire CW1 6ZD
United Kingdom
0870237638/-_en/ Original instructions / Modifications reserved

Table of Contents
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Table of Contents
1 Safety .......................................................................................................................................3
2 Product Description ..................................................................................................................4
2.1 Description of Figures 1 - 4 .............................................................................................. 6
2.2 Operating Principle .......................................................................................................... 7
2.3 Application....................................................................................................................... 8
2.4 Start Controls ................................................................................................................... 8
3 Transport ..................................................................................................................................8
4 Storage .....................................................................................................................................9
4.1 Short Term (Up to 3 Months)........................................................................................... 9
4.2 Medium Term (3 Months to 6 Months)............................................................................ 9
4.3 Long Term (Over 6 Months) ............................................................................................ 9
5 Installation................................................................................................................................10
5.1 Installation Conditions...................................................................................................... 10
5.2 Connecting Lines / Pipes .................................................................................................. 10
5.2.1 Suction Connection ...............................................................................................11
5.2.2 Discharge Connection ...........................................................................................11
5.2.3 Operating Liquid Connection ................................................................................12
5.3 Operating Liquid Settings................................................................................................. 13
5.4 Fitting the Coupling ......................................................................................................... 15
5.5 Electrical Connection ........................................................................................................ 16
5.5.1 Wiring Diagram Three-Phase Motor......................................................................16
6 Commissioning.........................................................................................................................17
6.1 Preventing Cavitation....................................................................................................... 18
7 Maintenance.............................................................................................................................19
7.1 Maintenance Schedule ..................................................................................................... 19
8 Overhaul...................................................................................................................................20
9 Decommissioning.....................................................................................................................20
9.1 Dismantling and Disposal ................................................................................................. 20
10 Spare Parts................................................................................................................................21
11 Troubleshooting .......................................................................................................................22
12 Technical Data..........................................................................................................................26
13 EU Declaration of Conformity...................................................................................................28

Safety | 1
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1 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 state-of-the-art meth-
ods. Nevertheless, residual risks may remain. This instruction manual highlights potential
hazards where appropriate. Safety notes and warning messages are tagged with one of
the keywords DANGER, WARNING, CAUTION, NOTICE and NOTE as follows:
DANGER
... indicates an imminent dangerous situation that will result in death or serious injuries if
not prevented.
WARNING
... indicates a potentially dangerous situation that could result in death or serious injuries.
CAUTION
... indicates a potentially dangerous situation that could result in minor injuries.
NOTICE
... indicates a potentially dangerous situation that could result in damage to property.
NOTE
... indicates helpful tips and recommendations, as well as information for efficient and
trouble-free operation.

2 | Product Description
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2 Product Description
NOTE
Technical term.
In this instruction manual, we consider that the term ‘machine’ refers to the ‘vacuum
pump’.
NOTE
Illustrations
In this instruction manual the illustrations may differ from the machine appearance.
OUTIN
OPO
SSI
SSIOPI
IDS
LR 0110 A to LR 0300 A

Product Description | 2
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OUTIN
AOUT OPO AOUT
AIN SSIOPI
AIN
IDS
LR 0420 A and LR 0580 A
AIN Alternative side suction connections* AOUT Alternative side discharge connections**
IDS Integral discharge separator IN Suction connection
OPI Operating liquid inlet OPO Operating liquid outlet
OUT Discharge connection SSI Shaft seal flushing inlet***
* No manifold, both connections to be used.
** For installations where gas and liquid are discharged to open gutter, both connec-
tions open.
*** Supplied only when no internal flushing.

2 | Product Description
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FIGURE 1 FIGURE 2
FIGURE 3 FIGURE 4
Gas
Discharge
Gas Discharge
Gas and
Liquid
Discharge
Gas Discharge
Liquid
Discharge
Drain Drain
Drain
Drain
Suction
SuctionSuction
Suction
Makeup
Overflow
Makeup
Overflow
IDS GV
PG
SSC
SSI
CG
OPC
OPI
ADV
OPDGPD
ICV
SV LLI HX
ADV Automatic drain valve CG Compound pressure gauge
GPD Gland packing drain GV Vacuum gauge
HX Heat exchanger ICV Inlet check valve
IDS Integral discharge separator LLI Liquid level indicator
OPC Operating liquid control OPD Operating liquid drain
OPI Operating liquid inlet PG Pressure gauge
SSC Shaft seal flushing control SSI Shaft seal flushing inlet
SV Separator vessel
2.1 Description of Figures 1 - 4
• Figure 1 shows the general standard once through arrangement with integral dis-
charge separator manifold.
• The arrangements of figure 2 (partial recirculation) and 3 (total recirculation) are for
handling combustible, corrosive and explosive gases as well as the gas which is re-
quired to be recycled. If the working liquid is recirculated in the system as shown in
figure 3, then a heat exchanger should be used for cooling the liquid.
• Figure 4 (option for LR 0420 A and LR 0580 A only) shows the arrangement where
gas and water leave from the side flange of the vacuum pump and discharge directly
into the gutter.

Product Description | 2
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NOTICE
If applying the configuration shown in figure 4.
The discharge pressure will rise and lead to an increase in shaft power.
• Make sure the cross-sectional area of the gutter is large enough.
NOTICE
If recirculation of the service liquid is not required.
Drainage of the liquid should comply with the appropriate environmental regulations.
WARNING
If handling gas that is flammable or toxic.
Risk of severe injury!
• The drained liquid should be separated twice and transferred to a safe place when ap-
plying the figure 1 arrangement. Particular care should be taken to avoid any leakage
of dangerous gases from the water drain outlet.
WARNING
If applying the configuration shown in figures 2 and 3.
The gas leakage should be controlled according to the local conditions.
2.2 Operating Principle
INLET
DISCHARGE
SIDE INLET
SIDE
DISCHARGE
The machine works on the liquid ring principle.
An eccentrically mounted impeller rotates in a housing partially filled with operating li-
quid (usually water). The impeller blades dip into the fluid, and the centrifugal force ex-
erted by their rotation forms a so-called liquid ring within the housing. The pumped me-
dium is transported in the spaces between the blades and the liquid ring. The eccentric
rotation of the impeller alters the volume of these spaces, causing gas to be drawn in,
compressed and expelled.

3 | Transport
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2.3 Application
The machine is intended for the suction of air, vapour and other gases.
For explosive gases and vapours (if a "Ex(inside)" sign is written on the nameplate),
please refer to the 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.
The machine is capable of maintaining ultimate pressure, see Technical Data [►26].
The machine is suitable for continuous operation.
Permitted environmental conditions, see Technical Data [►26].
2.4 Start Controls
The machine comes without start controls. The control of the machine is to be provided
in the course of installation.
3 Transport
WARNING
Suspended load.
Risk of severe injury!
• Do not walk, stand or work under suspended loads.
• The crane and slings must be capable of lifting the weight of the pump.
Machine weight:
see the technical data or the nameplate
Use appropriate slings
• The machine weight is marked on the nameplate.
• Generally, the lifting point should be on the baseplate on which the machine is in-
stalled.

Storage | 4
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• The lifting point of a bare shaft pump is shown above.
• Check the machine for transport damage.
4 Storage
NOTICE
Storage temperature below +5°C.
Risk of damage to the machine!
• 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.
4.1 Short Term (Up to 3 Months)
• Seal all apertures with adhesive tape or provided caps.
If possible:
• Store the machine indoors, dry, dust free and if possible in original packaging
preferably at temperatures between +5 … 55 °C.
4.2 Medium Term (3 Months to 6 Months)
• Remove the shaft coupling guard (if not supplied as a bare shaft machine).
• Rotate the machine shaft by hand weekly to prevent bearing indentation.
• Leave the shaft at approximately 90 degrees to the original position, using a tempor-
ary mark on the shaft to assist.
• Replace the coupling guard, taking care to align correctly and ensure that all fasteners
are replaced and fully tightened.
• Where shaft seal is gland packing, loosen the packing gland plate.
4.3 Long Term (Over 6 Months)
If the machine is constructed in cast iron material:
• Preserve internals by using a combined VPI (Vapour Phase Inhibitor) and Contact In-
hibitor Oil at a recommended concentration of 1 litre per m3 to prevent the machine
from corroding. Ensure all apertures are sealed after application.
• Remove the shaft coupling guard (if not supplied as a bare shaft machine).
• Rotate the machine shaft by hand weekly to prevent bearing indentation.
• Leave the shaft at approximately 90 degrees to the original position, using a tempor-
ary mark on the shaft to assist.
• Coat the exposed shaft ends and shaft coupling with wax preservative or heavy
grease.
• Replace the coupling guard, taking care to align correctly and ensure that all fasteners
are replaced and fully tightened.

5 | Installation
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5 Installation
5.1 Installation Conditions
NOTICE
Use of the machine outside of the permitted installation conditions.
Risk of premature failure!
Loss of efficiency!
• Take care that the installation conditions are fully complied with.
• Make sure that the environment of the machine is not potentially explosive.
• Make sure that the ambient conditions comply with the Technical Data [►26].
• Make sure that the environmental conditions comply with the protection class of the
motor.
• 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 of the motor fan are not covered or ob-
structed and that the cooling air flow is not affected adversely in any other way.
• Make sure that enough space remains for maintenance work.
• Make sure that the machine is placed or mounted horizontally on a flat surface.
• Make sure that the machine is connected to an operating liquid system, see Operating
Liquid Connection.
• Make sure that all provided covers, guards, hoods, etc. are mounted.
In case of a machine delivery without motor:
• Make sure that the coupling is correctly aligned, see Fitting the Coupling [►15].
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.
5.2 Connecting Lines / Pipes
• Remove all protective covers before installation.
• Make sure that the connection lines cause no stress on the machine‘s connection; if
necessary use flexible joints.
• 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 efficiency. Seek advice from your Busch representative.