BUSCH DOLPHIN VL 0100 A Configuration guide

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Instruction Manual Supplement
DOLPHIN VL Systems
Liquid Ring Vacuum Pumps
VL 0100 A, VL 0130 A, VL 0170 A, VL 0180 A, VL 0220 A, VL 0270 A
VL 0320 A, VL 0430 A, VL 0510 A, VL 0530 A, VL 0630 A, VL 0750 A, VL 0800 A
0870233816/-_en / Original instructions / Modifications reserved 08/01/2021
Busch GVT Ltd.
Unit A, Westmere Drive
Crewe, Cheshire CW1 6ZD
United Kingdom

Table of Contents
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Table of Contents
1 Safety .......................................................................................................................................3
2 Product Description ..................................................................................................................4
2.1 Operating Principle .......................................................................................................... 6
2.1.1 Once-Through Operation...................................................................................... 7
2.1.2 Partial Recovery (Open Circuit).............................................................................. 7
2.1.3 Total Recovery (Closed Circuit).............................................................................. 7
2.2 VL System Description...................................................................................................... 7
2.3 Start Controls ................................................................................................................... 8
2.4 Control Concept............................................................................................................... 8
2.4.1 Once Through Operation ...................................................................................... 8
2.4.2 Partial Recovery (Open Circuit).............................................................................. 8
2.4.3 Total Recovery (Closed Circuit).............................................................................. 9
3 Transport ..................................................................................................................................10
4 Storage .....................................................................................................................................10
5 Installation................................................................................................................................10
5.1 Installation Conditions...................................................................................................... 10
5.2 Connecting Lines / Pipes .................................................................................................. 11
5.2.1 Operating Liquid Connection ................................................................................11
5.3 Electrical Connection ........................................................................................................ 14
5.3.1 Wiring Diagram Three-Phase Motor......................................................................14
5.4 Electrical Connection of the Monitoring Devices............................................................... 15
5.4.1 Wiring Diagram Solenoid Valve ............................................................................. 15
5.4.2 Wiring Diagram Temperature Transmitter.............................................................. 15
5.4.3 Wiring Diagram Level Switches ............................................................................. 15
6 Commissioning.........................................................................................................................16
6.1 Preventing Cavitation....................................................................................................... 16
7 Maintenance.............................................................................................................................17
7.1 Maintenance Schedule ..................................................................................................... 17
8 Overhaul...................................................................................................................................18
9 Decommissioning.....................................................................................................................18
9.1 Dismantling and Disposal ................................................................................................. 18
10 Spare Parts................................................................................................................................19
11 Troubleshooting .......................................................................................................................20
12 Technical Data..........................................................................................................................23
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
Once through system
IN
OUT OPV
OPO
ACV
BF OPI
STOPC PRV
CG
SV LRP NRV
Partial recovery system
IN
OUT
OPO
ACV
BF
SV LRP NRV
OPD TSA OPC TI
ST PG OPV
LIIVOPI

Product Description | 2
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Total recovery system
IN
OUT TI
LS
ACV
OPO BF
NRV
SV LRP
CLO OPD CLI OPCPHE
ST PG OPV
OPI IV LI
ACV Anti-cavitation valve BF Base frame
CG Compound pressure gauge CLI Cooling liquid inlet
CLO Cooling liquid outlet IN Suction connection
IV Fresh liquid isolation valve LI Level indicator
LRP Liquid ring vacuum pump LS Level switch
OPC Operating liquid control valve OPD Operating liquid drain
OPI Operating liquid inlet OPO Operating liquid outlet / overflow
OPV Operating liquid solenoid isolation valve OUT Discharge connection
PG Pressure gauge PRV Pressure reducing valve
PHE Plate heat exchanger NRV Non return valve (suction)
ST Y-strainer / operating liquid filter SV Separator vessel
TI Temperature indicator TSA Temperature transmitter (PT100)
NOTICE
Drainage of the operating liquid.
• Dispose in compliance with applicable regulations.

2 | Product Description
6 / 32 0870233816_VL_Systems_-_IMS_en
NOTE
Illustrations
In this instruction manual the illustrations may differ from the machine appearance.
NOTE
Technical term.
In this instruction manual, we consider that the term ‘machine’ refers to the
‘VL System’.
NOTE
Instruction manual supplement.
This document is a supplement to the Dolphin LM and LT liquid ring vacuum pump in-
struction manual whose content remains valid.

Product Description | 2
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2.1 Operating Principle
2.1.1 Once-Through Operation
Process inlet
Operating liquid inlet
Gas discharge
Continuous flow liquid system does not recover the operating liquid which flows out of
the separator drain having been separated from the discharge gases which vent separ-
ately.
2.1.2 Partial Recovery (Open Circuit)
Process inlet
Operating liquid inlet
Gas discharge
50% of operating liquid recovered
Partial recirculation liquid system reduces the consumption of fresh liquid by recovering
and recirculating 50% of the operating liquid. Fresh operation liquid is added to the sys-
tem via the separator makeup connection to maintain constant operating liquid tempera-
ture to the vacuum pump.
2.1.3 Total Recovery (Closed Circuit)
Process inlet
Topping-up
operating liquid Heat exchanger
Cooling water inlet and outlet
Gas discharge
Total recirculation liquid system recovers all of the operating liquid which is cooled by a
heat exchanger.

2 | Product Description
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2.2 VL System Description
The VL system description is written on the system’s nameplate. It is defined as in the
following example:
VL 0320 A T K O ZE M X
Design status of vacuum pump
Size of the vacuum pump
VL = Compact liquid ring vacuum system
M = single stage (LM) vacuum pump
T = two stage (LT) vacuum pump
Motor reference
K = Cast iron construction / 316 stainless steel
M = 316 stainless steel throughout
X = System suitable for non-hazardous area
E = ATEX system
P = Chemical seals (PTFE/FFKM seals and elastomers)
M = Standard seals (Viton)
O = Once through liquid system
P = Partial recirculation liquid system
T = Total recirculation liquid system (plate heat exchanger)
S = Total recirculation liquid system (shell and tube exchanger)
2.3 Start Controls
The machine comes without start controls. The control of the machine is to be provided
in the course of installation.
2.4 Control Concept
2.4.1 Once Through Operation
Operating liquid is continuously supplied to the system whilst it is operating via the inlet
pipe. The process gas and operating liquid are discharged from the vacuum pump to-
gether into the separator vessel (SV) where they are separated. The gas leaves through
the discharge connection and the operating liquid through the operating liquid outlet
connection at the bottom of the separator.
At the operating liquid inlet the Y-strainer (ST) prevents particles greater than 0.1 mm
entering the vacuum pump.
The pressure reducing valve (PRV) reduces the operating liquid supply pressure to 1
bar(g) maximum. The solenoid valve (OPV) is linked in to the site control (provided by
others) to open and close with the start and stopping of the vacuum pump to prevent
flooding the vacuum pump when stopped.
Operating liquid control valve (OPC) allows the operating liquid flow rate to be regu-
lated for optimum performance of the system, with pressure gauge (PG) indicating the
operating liquid pressure at the vacuum pump inlet.
The suction non-return valve (NRV) prevents operating liquid from flowing back into the
process when the system stops under vacuum.

Product Description | 2
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2.4.2 Partial Recovery (Open Circuit)
Approximately 50% of the operating liquid is recirculated within the system whilst addi-
tional liquid is added via the fresh liquid line to maintain the liquid temperature. The pro-
cess gas and operating liquid are discharged from the vacuum pump together into the
separator vessel (SV) where they are separated. The gas leaves through the discharge
connection, whilst the operating liquid level is maintained as excess liquid drains from the
separator overflow connection (OPO). The level indicator (LI) provides visual indicator of
the liquid level in the system.
Through the site control system (by others) the operating liquid temperature is mon-
itored by PT100 temperature transmitter (TSA) opening and closing the solenoid valve
(OPV) to allow fresh cooler liquid into the system. Recommended temperature variation
around the set point for switching is 3°C.
At the operating liquid inlet the Y-strainer (ST) prevents particles greater than 0.1 mm
entering the vacuum pump.
The manual fresh liquid isolation valve (IV) allows the system liquid inlet to be isolated
whilst the strainer is cleaned.
Operating liquid control valve (OPC) allows the operating liquid flow rate to be regu-
lated for optimum performance of the system.
Suction non return valve (NRV) prevents operating liquid from flowing back into the pro-
cess when the system stops under vacuum.
2.4.3 Total Recovery (Closed Circuit)
All the operating fluid is recirculated within the system allowing liquid other than water
to be used as the operating liquid. Constant liquid temperature in the system is main-
tained by a heat exchanger with a separate cooling liquid supply. The process gas and
operating liquid are discharged from the vacuum pump together into the separator ves-
sel (SV), where they are separated. The gas leaves through the discharge connection
whilst high operating liquid level (condensing suction load) is prevented by excess liquid
draining from the separator overflow connection (OPO).
Through the site control system (by others) the operating liquid level is increased by the
solenoid valve (OPV) opening with low level signal from the low level switch. Valve
closes on signal from the high level switch. The level indicator (LI) provide visual indica-
tion of the liquid level in the system. At the operating liquid inlet the strainer (ST) pre-
vents particles greater than 0.1 mm entering the vacuum pump.
The manual fresh liquid isolation valve (IV) allows the system liquid inlet to be isolated
whilst the Y-strainer is cleaned.
Operating liquid control valve (OPC) allows the operating liquid flow rate to be regu-
lated for optimum performance of the system.
Suction non return valve (NRV) prevents operating liquid from flowing back into the pro-
cess when the system stops under vacuum.

3 | Transport
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3 Transport
WARNING
Suspended load.
Risk of severe injury!
• Do not walk, stand or work under suspended loads.
WARNING
Lifting the VL system incorrectly.
Risk of severe injury!
Risk of damage to the machine!
• Do not lift the entire system by the vacuum pump and the motor.
• Check the machine for transport damage.
The machine weight is marked on the nameplate.
• When disassembling the system lift each component separately.
• Make sure to comply with the suitable lifting method which is described in each in-
struction manual of the separate machine.
Different lifting variants are possible.
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.
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.
If there is Ex(o) sign written on the nameplate:
• Please refer to the ATEX supplement for additional safety information.
• Make sure that the ambient conditions comply with the Technical Data [►23].

Installation | 5
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• 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 all provided covers, guards, hoods, etc. are mounted.
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 very 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.
NOTICE
Ingress of foreign objects.
Risk of damage to the machine!
If the inlet gas contains foreign solid particles:
• Install a suitable inlet screen (smaller than 0.1 mm mesh size) upstream of the ma-
chine.
CAUTION
Restriction of the separator vent.
Will cause back pressure and possible separator failure.
•
The separator vent piping should not be restricted as separator vessel is not pressure rated.
• Make sure that the discharged gas will flow without obstruction. Do not shut off or
throttle the discharge line or use it as a pressurised air source.
5.2.1 Operating Liquid Connection
Dolphin VL 0100-0800 A Once through

5 | Installation
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IN
OPO
OPI
OUT
Dolphin VL 0100-0800 A Partial recovery
IN
OPO
OPI
OUT
OPD
Dolphin VL 0100-0800 A Total recovery - Plate heat exchanger

Installation | 5
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IN
OPO OPI
OUT
OPD CLI
CLO
Dolphin VL 0100-0800 A Total recovery - Shell and tube heat exchanger
IN
OPI OPD1
OUT
CLO1 OPO
CLI1
Connection size:
Machine type IN OUT OPO OPI OPD CLO CLI OPD1 CLI1 CLO
1
VL 0100 - 0270 A G1 1/2 R2 R1 ½ G1/2 G1/2 G1/2 G1/
2
G1/2 G1 G1
VL 0320 - 0530 A G2 R3 R2 G1/2 G3/4 G3/4 G3/
4
G1 G1 G1
VL 0630 – 0800 A G2 1/2 R4 R2 G1/2 G3/4 G3/4 G3/
4
G1 G1 G1
• Make sure that the cooling liquid complies with the requirements, see Technical Data
[►23].

5 | Installation
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5.3 Electrical Connection
DANGER
Live wires.
Risk of electrical shock.
• Electrical installation work must only be executed by qualified personnel.
• Make sure that the power supply for the motor is compatible with the data on the
nameplate of the motor.
• The electrical installation must comply with applicable national and international
standards.
• Provide a lockable disconnect switch on the power line so that the machine is com-
pletely secured during maintenance tasks.
• Provide an overload protection according to EN 60204-1 for the motor.
• Make sure that the motor of the machine will not be affected by electric or electro-
magnetic disturbance from the mains; if necessary seek advice from Busch.
• Connect the protective earth conductor.
• Electrically connect the motor.
NOTICE
The motor frequency is too low.
Loss of efficiency, not enough power to create the sealing liquid ring.
• The motor speed must always be higher than the minimum speeds shown in the
Technical Data [►23].
5.3.1 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.
Risk of damage to the vacuum system!
• Operating the vacuum system with the rotation in the wrong direction can result in
the operating liquid flowing back to the vacuum system. Prior to start-up, check for
correct direction of rotation.
If the rotation of the motor must be changed:
• Switch any two of the motor phase wires.

Installation | 5
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5.4 Electrical Connection of the Monitoring Devices
NOTE
The accessories below are considered as standard.
If other specific components should be used, refer to the instruction manual of the ac-
cessory in question.
5.4.1 Wiring Diagram Solenoid Valve
Part no.: VZS/0.50/DW/M/V1
Supplier reference : Model CLO3EB13T
Pilot Diaphragm
Electrical data :
Ui = 24 VDC ; Pi = 5.5 W ; IP 65
Contact: Normally closed
IN OUT
In : IN
Out : OUT
Coil de-energised : IN and OUT close
Coil energized : IN to OUT
5.4.2 Wiring Diagram Temperature Transmitter
Part no.: TS/2754
Supplier reference : H&B Sensors
PRT Probe 3 wire Class B
Electrical data :
4 … 20 mA > -50 … + 250 °C
3 WIRE PT100 CLASS B
TO BS EN 60751
5.4.3 Wiring Diagram Level Switches
Part no.: 0652700664
Supplier reference : Kobold: NBK-RM
Bi-Stable change over
Electrical data :
Maximum switching capacity: 60 W /
VA;
230 VAC/DC; 0.8 A
IP67; integral 3m cable provided
Brown
black
blue
Black / Blue Black / Brown
Float above
(low switch)
Open Electrical
conductive
Float below
(high switch)
Electrical
conductive
Open

6 | Commissioning
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6 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!
• Prior to commissioning, the operating and cooling liquid system must be connected
and open.
• Make sure that the installation conditions (see Installation Conditions [►10]) are met.
Before operating the machine:
• Fill with operating liquid by opening the solenoid valve until the level is at the va-
cuum pump shaft centre – overflow on separator. Ensure operating liquid control
valve is open during this process.
• Check the operation of all automatic valves before start up.
• Switch on the machine.
• Make sure that the maximum permissible number of starts does not exceed the re-
commendation from the motor manufacturer.
After a few seconds of operation:
• Turn on/activate the operating (and cooling) liquid system device.
• Make sure that the operating conditions comply with the Technical Data [►23].
As soon as the machine is operated under normal operating conditions:
• Measure the motor current and record it as reference for future maintenance and
troubleshooting work.
6.1 Preventing Cavitation
NOTICE
Cavitation.
Risk of damage to the machine!
If you hear crackling noise:
• Control the pressure.
The machine is fitted with anti-cavitation line and valve (ACV). When cavitation is ob-
served, open the valve to bleed gas into the vacuum pump to reduce cavitation.

Maintenance | 7
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7 Maintenance
WARNING
Machines contaminated with hazardous material.
Risk of poisoning!
Risk of infection!
If the machine is contaminated with hazardous material:
• Wear appropriate personal protective equipment.
CAUTION
Hot surface.
Risk of burns!
• Prior to any action requiring touching the machine, let the machine cool down first.
• Shut down the machine and lock against inadvertent start up.
• Turn off the operating liquid system.
• Vent the connected lines to atmospheric pressure.
If necessary:
• Drain the operating liquid
• Disconnect all connections
7.1 Maintenance Schedule
The maintenance intervals depend very much on the individual operating conditions. The
intervals given below are desired to be considered as starting values which should be
shortened or extended as appropriate. Particularly harsh applications or heavy duty oper-
ation, such as high dust loads in the environment or in the process gas, other contamina-
tion or ingress of process material, can make it necessary to shorten the maintenance in-
tervals significantly.
Interval Maintenance work
Monthly • Check the machine for liquid leaks - in case of leaks
have the machine repaired (contact Busch).
• Check gauges are functioning – replace if damaged.
Yearly • Clean Y-strainer.
• Clean inlet screen if installed.
• Drain and clean level indicator.
• Flush and clean heat exchanger.
• Check function of electrical control devices.

8 | Overhaul
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8 Overhaul
WARNING
Machines contaminated with hazardous material.
Risk of poisoning!
Risk of infection!
If the machine is contaminated with hazardous material:
• Wear appropriate personal protective equipment.
NOTICE
Improper assembly.
Risk of premature failure!
Loss of efficiency!
• It is highly recommended that any dismantling of the machine that goes beyond any-
thing that is described in this manual should be done through Busch.
In case of the machine having conveyed gas that was contaminated with foreign materi-
als which are dangerous to health:
• Decontaminate the machine as much as possible and state the contamination
status in a ‘Declaration 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).
9 Decommissioning
• Shut down the machine and lock against inadvertent start up.
• Vent the connected lines to atmospheric pressure.
• Disconnect all connections.
If the machine is going to be stored:
• See Storage.
9.1 Dismantling and Disposal
• Separate special waste from the machine.
• Dispose of special waste in compliance with applicable regulations.
• Dispose of the machine as scrap metal.

Spare Parts | 10
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10 Spare Parts
NOTICE
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 Description Part no.
Coupling spare for:
VL 0100 A
VL 0130 A
VL 0170 A
VL 0180 A
VL 0220 A
VL 0270 A
VL 0320 A
VL 0430 A
VL 0510 A
VL 0530 A
Intended for standard IEC motor installations
1x coupling flexible insert
867.0/HRC110
Coupling spare for:
VL 0630 A
VL 0750 A
VL 0800 A
Intended for standard IEC motor installations
1x coupling flexible insert
867.0/HRC150
Heat exchanger for:
VL 0100 A
VL 0130 A
VL 0170 A
VL 0180 A
VL 0220 A
VL 0270 A
Intended for all applications
1x plate type heat exchanger – stainless steel,
braised plates
HX/2706
Heat exchanger for:
VL 0320 A
VL 0430 A
VL 0510 A
VL 0530 A
VL 0630 A
VL 0750 A
VL 0800 A
Intended for all applications
1x plate type heat exchanger – stainless steel,
braised plates
HX/2708
Heat exchanger
service kit for:
VL 0100 A
VL 0130 A
VL 0170 A
VL 0180 A
VL 0220 A
VL 0270 A
Intended for shell and tube heat exchanger
2x End cover seals
0990 700 563
Heat exchanger
service kit for:
VL 0320 A
VL 0430 A
VL 0510 A
VL 0530 A
VL 0630 A
VL 0750 A
VL 0800 A
Intended for shell and tube heat exchanger
2x End cover seals
0990 700 564
If other parts are required:
• Contact your Busch representative for the detailed spare parts list.

11 | Troubleshooting
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11 Troubleshooting
Problem Possible Cause Remedy
The machine does not start. The motor is not supplied
with the correct voltage.
• Check the power supply.
Corrosion between the rotor
and the housing.
• Eliminate by use of anti-
corrosion liquid.
• Repair the machine (con-
tact Busch).
Solid foreign matter has
entered the machine.
• Remove the solid foreign
matter or repair the ma-
chine (contact Busch).
• Install an inlet screen if
necessary.
Ice in the machine, the oper-
ating liquid has frozen.
• Carefully warm up the
machine.
• Defrost the operating li-
quid.
The motor is defective. • Replace the motor.
The machine runs very nois-
ily or rattles.
The operating liquid level is
too high.
• Adjust the regulating
valves to drain the pump
down to center line.
Density or viscosity of the
operating liquid too high.
• Check Operating Liquid
Settings.
• Provide a different oper-
ating liquid or a stronger
drive motor.
The machine runs in the
wrong direction.
• Check the direction of ro-
tation, see Wiring Dia-
gram Three-Phase Motor
[►14].
Defective bearings. • Repair the machine (con-
tact Busch).
The vacuum pump cavitates
(periodic formation and col-
lapsing of steam bubbles in
the operating liquid).
• Consult the chapter Pre-
venting Cavitation.
• Adjust cooling liquid flow
rate to reduce the tem-
perature of the operation
liquid.
Worn coupling element. • Check the coupling and
repair it if necessary.