Pfeiffer Vacuum COMBILINE WU 232 User manual

PW 0200 BEN/J (1605)
OPERATING INSTRUCTIONS EN
Translation of the original instructions
COMBILINE
WU/WD/WH pumping stations

Table of contents
2
Table of contents
1 About this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Validity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Protective equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3 Proper use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.4 Improper use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Transport and storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 Unpacking / repacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.2 Transport. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.3 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Product description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1 Product identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1 Installation location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.2 Preparatory work. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.3 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.1 Recommendations for the operator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.2 Before switching on. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.3 Switching on the pumping station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.4 Switching off the pumping station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.5 Operating the pumping station with a control cabinet . . . . . . . . . . . . . . . . 19
7 Malfunctions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
8 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
8.1 Maintenance intervals and responsibilities . . . . . . . . . . . . . . . . . . . . . . . . 22
8.2 Removal of components for their maintenance . . . . . . . . . . . . . . . . . . . . 22
9 Decommissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
9.1 Shutting down for longer periods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
9.2 Re-starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
9.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
10 Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
11 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
12 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
12.1 Documentation for accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

About this manual
3
1 About this manual
1.1 Validity
This operating manual is for customers of Pfeiffer Vacuum. It describes the functioning
of the designated product and provides the most important information for safe use of
the unit. The description follows applicable EU guidelines. All information provided in this
operating manual refers to the current state of the product's development. The documen-
tation remains valid as long as the customer does not make any changes to the product.
Up-to-date operating instructions can also be downloaded from
www.pfeiffer-vacuum.com.
Applicable docu-
ments
*also available via www.pfeiffer-vacuum.com
1.2 Conventions
Safety instructions The safety instructions in Pfeiffer Vacuum operating instructions are the result of risk
evaluations and hazard analyses and are oriented on international certification stan-
dards as specified by UL, CSA, ANSI Z-535, SEMI S1, ISO 3864 and DIN 4844. In this
document, the following hazard levels and information are considered:
WU-/WD-/WH-Pumpstände Operating instructions
Declaration of Conformity Part of this document
Operating instructions for accessories (order-specifically) see section "accessories"*
DANGER
Imminent danger
Indicates an imminent hazardous situation that will result in death or serious injury.
WARNING
Possibly imminent danger
Indicates an imminent hazardous situation that can result in death or serious injury.
CAUTION
Possibly imminent danger
Indicates an imminent hazardous situation that can result in minor or moderate injury.
NOTICE
Command or note
Command to perform an action or information about properties, the disregarding of
which may result in damage to the product.

4
About this manual
Pictographs
Instructions in the
text
Work instruction: here you have to do something.
Abbreviations Okta: Roots pump
HV: Vacuum safety valve (with shut-off and venting function)
STP: Dust separator
SAS: Dust separator
OME: Oil mist filter
ODK: Oil mist filter with return unit
EVB: Angle valve
VFS 010: Power failure venting unit
KS: Condensor
KAS: Condensate separator
Symbols used The following symbols are used consistently throughout in all illustrations:
Roots pump (Okta)
Rotary vane pump
Screw pump
Rotary piston pump
Prohibition of an action to avoid any risk of accidents, the disregarding
of which may result in serious accidents
Warning of a displayed source of danger in connection with operation of
the unit or equipment
Command to perform an action or task associated with a source of dan-
ger, the disregarding of which may result in serious accidents
Important information about the product or this document

Safety
5
2Safety
2.1 Safety precautions
●Do not expose any body parts to the vacuum.
●Observe the safety and accident prevention regulations.
●Check regularly that all safety precautions are being complied with.
●Do not carry out any unauthorised modifications or conversions to the pumps.
●Depending on the operating and ambient conditions, the surface temperature of the
pumps may rise above 70 °C. Use suitable finger guards if necessary.
●When returning the components to us please note the instructions in the Service sec-
tion.
●Adjust the customer's process/operation mode clearly to the capacity of the pumping
station.
●The electrical connection may only be made by an expert electrician according to VDE
0105 in accordance with the regulations of VDE 0100.
2.2 Protective equipment
Determined situations concerning the handling of vacuum pumps require wearing of per-
sonal protective equipment. The owner, respectively the employer are obligated to pro-
vide an adequate equipment to any operating persons.
Duty to inform
Each person involved in the installation, operation or maintenance of the vacuum pump
must read and observe the safety-related parts of these operating instructions.
The operator is obligated to make operating personnel aware of dangers originating
from the vacuum pump, the pumped medium and the entire system.
Installation and operation of accessories
Pfeiffer Vacuum pumps can be equipped with a series of adapted accessories. The in-
stallation, operation and maintenance of connected devices are described in detail in
the operating instructions of the individual components.
For information on order numbers of components, see "Accessories".
Use original accessory parts only.
DANGER
Danger to health by hazardous substances during maintenance or installation
Depending on the process vacuum pumps, components or operating fluids can be con-
taminated by toxic, reactive or radioactive substances.
Wear adequate protective equipment during maintenance and repairs or in case of
reinstallation.
CAUTION
Risk of injury through hot surfaces
Vacuum pumps can become hot during operation.
Allow the pump to cool before maintenance and repairs.
If necessary wear protective gloves according to EN 420.

6
Safety
2.3 Proper use
●The pumping station is intended for evacuating vacuum chambers to pressure values
in the medium vacuum range.
●Only use the pumping station for creating vacuum.
●Only use the pumping station for evacuation of dry and inert gases; other applications
only after consultation with Pfeiffer Vacuum.
●Use suitable gases (process-specific) such as sealing gas, flushing gas and cooling
gas at the inlets of the pumping station components.
●Installation, operating and maintenance regulations must be complied with.
●Other accessories, than those described in this manual, must not be used without the
agreement of Pfeiffer Vacuum.
2.4 Improper use
Improper use will cause all claims for liability and warranties to be forfeited. Improper use
is defined as usage for purposes deviating from those mentioned above, especially:
●pumping of corrosive and reactive gases; special conditions of use only after consul-
tation with Pfeiffer Vacuum
●pumping of explosive media or of oxygen at greater than atmospheric concentration
●operation of the pumping station in potentially explosive areas
●operation of the pump with open vacuum flange
●pumping of gases containing impurities such as particles, dusts and condensate; note
the vapour compatibility levels of the pump
●pumping of substances that tend to sublime
●operation of the pumping station to generate pressure
●pumping of liquids
●connection to pumps or units which are not suitable for this purpose according to their
operating instructions
●connection to units which have exposed voltage-carrying parts
●the evacuation of gases that may form adherent deposits or condensate in the suction
chamber
WARNING
Increased noise emission!
Increased noise emission can occur within a limited area surrounding the vacuum
pump.
Provide noise protection or
wear hearing protection.
NOTICE
EC conformity
The manufacturer's declaration of conformity becomes invalid if the operator modifies
the original product or installs additional components.
Following installation into a plant and before commissioning, the operator must check
the entire system for compliance with the valid EU directives and reassess it accord-
ingly.

Transport and storage
7
3 Transport and storage
3.1 Unpacking / repacking
For transport, the pumping station is fastened to a pallet in a slip-free manner, covered
with a plastic sheet and secured in wooden holders or wooden crates.
3.2 Transport
Remove the locking cap from the vacuum and exhaust flange immediately before con-
necting!
– Check the cone strainer, paying attention to the O-ring.
Lift the pumping stations using the eyebolts provided on the frame or transport them
with a fork lift truck.
– For versions without a frame and eyebolts, use transport straps for lifting.
– Do not lift pumping station by the intake flange of the Roots pump.
Fig. 1: Lifting and transporting the pumping station
Disposal of packaging materials
The packaging materials cannot be reused after unpacking.
Dispose of them according to the applicable regulations.

8
Transport and storage
3.3 Storage
The pumping station is suitable for storage. Enclosed, dry and dust-free rooms are suit-
able storage locations.
Check that all the openings on the pumps are securely closed.
Store the pumping station only indoors, preferably at temperatures between -10 °C
and +40 °C.
– For a longer period of storage, leave the pumping station in its original packaging
or cover with a plastic sheet.
– After a period of storage longer than one year, it is recommended to carry out main-
tenance and change the operating fluid and lubricants prior to commissioning.
WARNING
There is a risk of injury if the system is not transported properly.
Danger to life from falling or protruding loads if the system is not properly secured to lift-
ing devices or is not transported properly.
Use suitable lifting devices and tools.
Ensure that the weight is distributed evenly (danger of tipping!).
Test the hanging for high center of gravity.
NOTICE
Note the risk of corrosion for storage
Storage of vacuum pumps can lead to corrosion and aging of lubricants/operating
fluids and elastomer seals.
Observe the notes in the operating manuals for the individual components.
Change lubricants and operating fluids before restarting operation.

Product description
9
4 Product description
4.1 Product identification
Roots pumping stations of the CombiLine series basically consist of a Roots pump (Ok-
ta), a backing pump and process-specific accessories. Various pumps can be used as
backing pump.
To correctly identify the product when communicating with Pfeiffer Vacuum, always have
the information from the rating plate available.
●Pumping station type and article number
●Serial number
●Voltage and rated current
●Date of manufacture
●Wiring diagram
●Weight
For component-specific data, please see the separately installed rating plates for the
pumps and motors.
Supply scope ●Pumping station components mounted on frame ready for connection, with all neces-
sary connecting lines including counter flanges on the intake side and pressure side:
– Stationary pumping stations with bores in the base plate for fastening
– Mobile pumping stations with castors
●Roots pump with motor in standard version or with magnetic coupling
●Backing pump with motor
– Rotary vane pump with suitable oil mist filter or
– Screw pump e. g. HeptaDry
●Operating fluid and lubricant P3 / D1
●Optional accessories
– Control cabinet
– Measuring gauge with measuring and control unit (e.g. TPG 261/262)
●Operating manuals for pumping station and individual components
●Wiring diagram for pumping stations with control cabinet

10
Product description
Variants CombiLine-WU with single-stage rotary vane pump
These pumping stations of the CombiLine-WU consist of a single-stage HenaLine rotary
vane pump with an integrated oil mist separator and a Roots pump.
1Pressure surge protected version: flange according to DIN PN 16
Option
SAS/STP
ONF/
OME
CombiLine- WU HenaLine Hena ... Okta ... A Pumping speed at 1 hPa 50 Hz in [m3/h]
Pumping speed at 1 hPa 60 Hz in [m3/h] Motor power at 50 Hz in [kW] Motor power at 60 Hz in [kW] Nominal connection diameter, inlet, flange according to ISO-F1, DN ---
Nominal connection diameter, outlet flange according to ISO-(K)F, DN Weight in [kg] Final pressure, total, (without gas ballast) [hPa] Final pressure, total, (with gas ballast) [hPa]
WU 232 60 250 230 280 2.6 3.1 63 40 240 8 ·10-3 5 ·10-2
WU 242 100 250 240 290 3.3 3.9 63 40 250 8 ·10-3 5 ·10-2
WU 252 200 250 250 300 6.3 6.4 63 100 410 8 ·10-3 3 ·10-2
WU 392 60 500 390 470 3.3 4.0 100 40 270 8 ·10-3 5 ·10-2
WU 412 100 500 400 500 4 4.8 100 40 285 8 ·10-3 5 ·10-2
WU 452 200 500 450 540 7 7.3 100 100 440 8 ·10-3 3 ·10-2
WU 462 300 500 460 550 9 9.3 100 100 470 8 ·10-3 3 ·10-2
WU 482 400 500 480 560 12.5 16.8 100 100 700 8 ·10-3 3 ·10-2
WU 752 60 1000 750 840 4.8 5.8 160 40 395 8 ·10-3 5 ·10-2
WU 852 100 1000 850 970 5.5 6.6 160 40 415 8 ·10-3 5 ·10-2
WU 912 200 1000 900 1100 8.5 9.1 160 100 570 8 ·10-3 3 ·10-2
WU 942 300 1000 940 1140 10.5 11.1 160 100 610 8 ·10-3 3 ·10-2
WU 982 400 1000 980 1180 14 18.6 160 100 930 8 ·10-3 3 ·10-2
WU 1002 630 1000 1000 1200 18 22.1 160 100 1100 8 ·10-3 3 ·10-2
WU 1702 200 2000 1700 1990 11 12.1 160 100 690 8 ·10-3 3 ·10-2
WU 1752 300 2000 1750 2050 13 14.1 160 100 715 8 ·10-3 3 ·10-2
WU 1902 400 2000 1900 2200 16.5 21.6 160 100 1040 8 ·10-3 3 ·10-2
WU 1952 630 2000 1950 2300 20.5 25.1 160 100 1200 8 ·10-3 3 ·10-2
WU 1992 1000 2000 2000 2300 27.5 36.6 160 100 1730 5 ·10-2 5 ·10-2
WU 2002 1600 2000 2000 2400 35.5 43.6 160 2x100 2250 5 ·10-2 5 ·10-2
WU 2952 300 4000 2900 3100 18.5 20.7 250 100 1030 8 ·10-3 3 ·10-2
WU 3202 400 4000 3200 3600 22 28.2 250 100 1280 8 ·10-3 3 ·10-2
WU 3302 630 4000 3300 4000 26 31.7 250 100 1440 8 ·10-3 3 ·10-2
WU 3702 1000 4000 3700 4400 33 43.2 250 100 1970 5 ·10-2 5 ·10-2
WU 3902 1600 4000 3800 4700 41 52 250 2x100 2500 5 ·10-2 5 ·10-2
WU 3502 400 6000 3500 4700 26 28.2 250 100 1530 8 ·10-3 3 ·10-2
WU 4202 630 6000 4200 5550 30 36.5 250 100 1680 8 ·10-3 3 ·10-2
WU 5002 1000 6000 5000 5700 37 48 250 100 2250 5 ·10-2 5 ·10-2
WU 5502 1600 6000 5500 6550 45 55 250 2x100 2750 5 ·10-2 5 ·10-2

Product description
11
CombiLine-WU with UnoLine Plus single-stage rotary vane pump
The pumping stations of the CombiLine-WU consist of a single-stage UnoLinePlus rotary
vane pump and a Roots pump. The pumping stations are additionally equipped with an
OME oil mist filter, an EVB angle valve and a VFS 010 power failure venting unit.
– Ultimate pressure, total: < 2 ·10-3 hPa (without gas ballast)
– Ultimate pressure, total: < 3 ·10-2 hPa (with gas ballast)
1Pressure surge protected version: flange according to DIN PN 16
CombiLine-WD with DuoLine® two-stage rotary vane pump
The pumping stations of the CombiLine-WD consist of a two-stage DuoLine®rotary vane
pump and a Roots pump. The pumping stations are additionally equipped with an OME
oil mist filter and are mounted on a base frame.
– Ultimate pressure, total: < 5 ·10-4 hPa (without gas ballast)
– Ultimate pressure, total: < 5 ·10-4 hPa (with gas ballast)
CombiLine-WU ... UnoLine Plus Okta ... A Pumping speed at 1 hPa 50 Hz in [m3/h]
Pumping speed at 1 hPa 60 Hz Motor power at 50 Hz in [kW] Motor power at 60 Hz in [kW] Emission sound pressure level at pA < 1 hPa in dB(A)
Nominal connection diameter, inlet, flange according to ISO-F1, DN ---
Nominal connection diameter, outlet flange according to ISO-F, DN --- Weight in [kg]
WU 471 BA 251 500 470 550 12.5 14.8 80 100 63 810
WU 951 BA 251 1000 950 1150 14 16.6 80 160 63 940
WU 1001 BA 501 1000 1000 1200 18 21.6 80 160 100 1500
WU 1801 BA 251 2000 1800 2100 16.5 19.6 80 160 63 1150
WU 2001 BA 501 2000 1900 2200 20.5 24.6 80 160 100 2000
WU 3001 BA 251 4000 2900 3250 22 26.2 80 250 63 1300
WU 3501 BA 501 4000 3400 3900 26 31.2 80 250 100 1750
WU 4801 BA 501 6000 4700 5400 30 36 80 250 100 2050
Option
SAS/STP
ONF/OME
EVB
VFS 010
KS

12
Product description
1Pressure surge protected version: flange according to DIN PN 16
Please refer to the associated design drawing and the relevant pumping station rating
plate / the rating plate for the component.
CombiLine-WH with screw pump HeptaDry®
The pumping stations of the CombiLine-WH consist of a srew pump HeptaDry®and a
Roots pump Okta ... .
– Ultimate pressure, total: < 2 ·10-3 hPa (50 Hz operation)
– Ultimate pressure, total: < 5 ·10-4 hPa (60 Hz operation)
CombiLine- WD DuoLine® DUO ... Okta ... Pumping speed at 1 hPa 50 Hz in [m3/h]
Pumping speed at 1 hPa 60 Hz in [m3/h] Motor power at 50 Hz in [kW] Motor power at 60 Hz in [kW] Emission sound pressure level at pA < 1 hPa in dB(A)
Nominal connection diameter, inlet, flange according to ISO-F1, DN ---
Nominal connection diameter, outlet flange according to ISO-F, DN --- Weight in [kg]
WD 220 35 250 220 260 1.85 2.2 75 63 40 220
WD 235 65 250 230 290 2.25 2.7 75 63 40 250
WD 245 125 250 245 300 4.75 5.7 80 63 40 470
WD 380 35 500 380 390 2.6 3.1 75 100 40 240
WD 400 65 500 400 470 3.0 3.6 75 100 40 250
WD 440 125 500 440 530 5.5 6.6 80 100 63 400
WD 470 255 500 470 570 9 10.8 80 100 100 570
WD 800 65 1000 800 880 4.5 5.4 75 160 40 400
WD 900 125 1000 900 1050 7 8.4 80 160 63 530
WD 950 255 1000 950 1190 10.5 12.6 80 160 100 700
WD 1600 125 2000 1600 1850 9.5 11.4 80 160 63 760
WD 1800 255 2000 1800 2200 13 15.6 80 160 100 980
WD 3000 255 4000 3000 3600 18.5 22.2 80 250 100 1180
Option
SAS/STP
KAS
HV
OME/ODK
Option
SAS/STP

Product description
13
1 Pressure surge protected version: flange according to DIN PN 16
CombiLine-WH with rotary piston pump UniDry
The CombiLine-WH pumping stations consist of a Roots pump Okta and a rotary piston
pump UniDry plus accessories (optional).
– Ultimate pressure, total: < 5 ·10-3 hPa (UniDry 50 S/SM)
CombiLine- WH HeptaDry® Hepta ...(P) Okta ... A Pumping speed at 1 hPa 50 Hz in [m3/h]
Pumping speed at 1 hPa 60 Hz in [m3/h] Motor power at 50 Hz in [kW] Motor power at 60 Hz in [kW] Nominal connection diameter, inlet, flange according to ISO-F1, DN ---
Nominal connection diameter, outlet flange according to DN --- PN 16 Weight in [kg]
WH 250 (P) 100 250 250 310 3.75 4.9 100 40 490
WH 450 (P) 100 500 450 530 4.5 5.8 100 40 510
WH 470 (P) 200 500 470 560 7 9.3 100 50 570
WH 500 (P) 300 500 500 570 9 11 100 50 590
WH 900 (P) 100 1000 900 1000 6 7.6 160 40 640
WH 950 (P) 200 1000 950 1200 8.5 11.1 160 50 700
WH 970 (P) 300 1000 970 1200 10.5 12.8 160 50 720
WH 990 (P) 400 1000 990 1200 10.5 12.8 160 80 950
WH 1000 (P) 630 P 1000 1000 1250 18 20,6 160 80 1150
WH 1700 (P) 200 2000 1700 2150 11 14.1 160 50 810
WH 1800 (P) 300 2000 1800 2280 13 15.8 160 50 840
WH 1900 (P) 400 2000 1900 2280 13 15.8 160 80 1070
WH 2000 (P) 630 P 2000 2000 2350 20.5 23.6 160 80 1270
WH 3300 (P) 400 4000 3300 3880 18.5 22.4 160 80 1300
WH 3500 (P) 630 P 4000 3500 4050 26 30.2 250 80 1500
WH 5000 (P) 630 P 6000 5000 5800 30 35 250 80 1750
CombiLine- WH UniDry ... Okta ... A Pumping speed at 1 hPa 50 Hz in [m3/h]
Pumping speed at 1 hPa 60 Hz in [m3/h] Motor power at 50 Hz in [kW] Motor power at 60 Hz in [kW] Emission sound pressure level at pA < 1 hPa in dB(A)
Nominal connection diameter, inlet, flange according to ISO-F, DN --- Nominal connection diameter, outlet, flange according to ISO-F, DN --- Weight in [kg]
WH 240 S/SM 50 S/SM 250 240 290 3.75 4.5 75 63 40 360
WH 400 S/SM 50 S/SM 500 400 470 4.5 5.4 75 100 40 390

14
Product description
4.2 Function
The pumping stations of the CombiLine are two-stage pumping stations with a single-
stage or two-stage rotary vane pump or a dry pump as a backing pump and a Roots
pump.
The pumping stations are intended for evacuating vacuum chambers to pressure values
in the medium vacuum range.

Installation
15
5 Installation
5.1 Installation location
Observe the following requirements when setting up the pump:
●Consider the load-bearing capacity of the installation site.
●Maximum installation altitude 2000 m (above mean sea level)
●Permissible ambient temperature: +12 ... 40 °C
●Maximum relative humidity 85%
The installation location is to be chosen so that pumping station components are freely
accessible for inspection and servicing.
– Note set-up conditions for the individual components.
Always place the pumping station on a firm, even surface.
– The base frame has four holes for anchoring onto the base.
Protect pumping station against air draughts and direct atmospheric exposure.
When installing the pump in a closed housing, ensure there is sufficient air circulation.
– Sight glass and gas ballast valve must be visible and readily accessible.
– Voltage and frequency information given on the motor rating plate must be visible.
Mobile pumping stations must be located on a horizontal surface and the locking roll-
ers secured.
5.2 Preparatory work
Before installing and commissioning the system, the installation location must be
equipped.
The pumping station is delivered mounted on a base frame and ready for connection. If
parts of the pumping station are dismantled for transport reasons, they must be re-
mounted according to the design drawing.
Fill pumping station components with operating fluids and lubricants;
– Quantity and type in accordance with the rating plate.
Remove protective cover from intake and exhaust flange.
Provide process-specific and pump-specific media supply and connect.
Ensure process-specific and pump-specific media disposal.
NOTICE
Use approved operating fluids only!
The use of operating fluids that have not been approved by Pfeiffer Vacuum shall result
in a limited warranty. In such cases, it is not possible to guarantee that product-specific
performance data will be achieved.
Prior consultation is required before using other application-specific operating fluids.
Ensure media supply!
Note information on supply and disposal of relevant media to be provided such as elec-
tricity, cooling water and inert gas.
See rating plate
See technical data for individual components
CAUTION
Risk of tripping!
Risk of tripping when working in the installation area.
Place supply lines in such a way that no tripping hazards occur.

16
Installation
5.3 Connections
Connecting the vac-
uum side
The connection between the pump and the vacuum chamber should be kept as short
as possible and should have at least the nominal diameter of the pump flange. Use a
greater nominal diameter on line lengths > 5 m.
Lay the pipes in such a way that the Roots or backing pump will not be subjected to
any mechanical tension.
– Suspension components should be integrated into the piping.
– Ensure that mating flanges are in a parallel position.
Clear welded lines of any welding scales, loose parts etc. before installation.
If dust appears in the intake medium, a dust filter must be installed in addition. When ex-
tracting vapors we recommend using condensate separators on the intake side and on
the exhaust side. Please enquire for details.
Connecting the ex-
haust side
Choose the cross-section of the exhaust line to be at least the size of the nominal
connection diameter of the vacuum pump's exhaust connection.
NOTICE
Electrostatic unloading procedures
Damage of safety-relevant parts or releasing unintentional machine movements.
Carry out installation works at the pumping station only by EMC trained specialists
according to the instructions of the parts manufacturers.
WARNING
Exposed, rotating rolling pistons!
Fingers and hands can become crushed when the intake flange is open.
Keep all body parts out of operating range of the rolling pistons.
Use a wooden handle to rotate the rolling pistons during cleaning.
NOTICE
Danger of intake of solid particles!
Even in clean processes, fouling from the system must be anticipated during initial com-
missioning.
Use a suitable start-up strainer at the intake connection (see accessories).
Ensure that this strainer is only removed when the risk of solid particles entering the
pump can be excluded.
Note loss of pumping speed if necessary.
CAUTION
High pressure in the exhaust line!
Danger of damage to the seals and danger of the pump bursting.
Install the line without shut-off valves on the exhaust side.
If there is danger of a build-up of excess pressure (> 1500 hPa abs.) in the lines, ob-
serve all official accident prevention safety regulations.
If the exhaust gases are being extracted, the exhaust pressure must be at least
250 hPa greater than the pressure at the intake side.

Installation
17
Piping to the pump must be suspended or supported.
– Physical forces from the piping system must not be allowed to act on vacuum
pumps.
Lay piping from the pump sloping downward so that no condensate can flow back into
the pump; otherwise fit a condensate separator.
– If an air trap is created in the system, then a device for draining condensation water
must be provided at the lowest point.
Connecting to the
mains power supply
The pumps are shipped as standard with a three-phase motor, but without accessories
for the electrical connection. Connection according to regulations requires the use of a
suitable motor protection switch. The setting of the motor protection switch must corre-
spond to the specification on the rating plate of the pump motor in question.
Check the direction of rotation for pumps with three-phase motors in accordance with
the description in the operating manual of the individual components (see the arrow
on the housing).
The operator must provide suitable safety devices, when connecting the pumping sta-
tion, for the separation of the pumping station from the mains (e.g. main switch or
emergency-stop button), so that the pumping station can be switched off in an emer-
gency situation without any problems.
Versions with a control cabinet
Pumping stations with a control cabinet are completely wired internally. The drive motors
of the Roots and backing pumps are already wired so they rotate in the same direction.
Make electrical connections according to the wiring diagrams located in the control
cabinet when the pumping station was shipped.
Fuse
In the version with a control cabinet the phase sequence relay has a monitoring function.
If a measuring tube is connected, the associated power supply unit has an internal 100
mA microfuse.
WARNING
Emission of toxic substances from the exhaust!
Danger of poisoning from emitted gases or vapours, which can be detrimental to health
and/or can pollute the environment, depending on the particular application.
Comply with the applicable regulations when working with toxic substances.
Only officially approved filter systems may be used to separate and remove these
substances.
DANGER
Voltage-bearing elements
Danger to life from electric shock.
The electrical connection can be carried out only by trained and authorised electri-
cians.
Disconnect the power supply and secure it against being switched back on.
Ensure the system is adequately earthed.

18
Operation
6Operation
6.1 Recommendations for the operator
●The service personnel must be advised in regular training courses on the necessity
for wearing the personal protective equipment. Working without protective equipment
can lead to serious and also lasting health damages.
●The operator advises in recurring training courses the operating, maintenance, and
service personnel in the correct behaviors while handling the pumping station. He ex-
plains that damages to persons and systems can occur, if the pumping station is not
operated correctly. To this in particular belong also information concerning the residual
risks.
●Before maintenance and repairs the pumping station is shut down. The main switch,
provided by the operator, is switched off by the operational, technically responsible su-
pervisor and secured against restarting with a lock. The key is taken off and carried.
●After completion of the work and before restarting, the responsible supervisor makes
sure, that this is possible without endangerment of persons or equipment. Before
switching on a well-timed and clear warning must be given to all involved persons.
6.2 Before switching on
The instructions also apply for each time the pumping station is restarted after shutting
down for storage, maintenance or inspection.
Check operating fluid and lubricant levels of the pumps and refill if necessary.
Check sealing oil chamber on Roots pump (oiler).
Check that all lines are properly connected.
Check process-specific and pump-specific media supplies.
Verify direction of rotation of pumps as described in the operating manuals for the in-
dividual components.
Operate shut-off units in the exhaust line in such a way that they open before or at the
same time as starting the pump.
6.3 Switching on the pumping station
The pumping station can be switched on using a common switch contact for the backing
pump and the Roots pump or with separate switches in accordance to the process re-
quirements.
For pumping stations with a control cabinet, the switch-on sequence is specified by the
controller. Switch on the master switch on the control cabinet.
Switch on pumping station.
When water cooling is used: Open cooling water supply and check the flow.
Open shut-off valve in the intake line and switch the pump over to the process.
When sealing gas is used: Open the sealing gas supply and check the flow.
NOTICE
Danger of corrosion from condensation in the pumps!
The operating fluid / lubricant can become contaminated by mist during evacuation, de-
grading the properties of the oil.
Bring pumping station to operating temperature before process start.
After completion of the process, let the pumping station continue to run for about 30
minutes with the intake line closed and the gas ballast valve open.

Operation
19
6.4 Switching off the pumping station
Close shut-off valve in the intake line and separate the pump from the process.
Switch off the pumping station.
Flush pumping station with flushing gas, if necessary.
Dry the pump completely inside after flushing.
Switch off process-specific and pump-specific media supplies.
Venting.
When shutting down for longer periods, see the operating manuals of the individual
components.
6.5 Operating the pumping station with a control cabinet
To ensure a safe process, operate the pumping station as follows:
Status at standstill – Shut-off valve intake line closed, if present.
– Exhaust valve closed, if present.
– Master switch 9.10 on control panel in position "0".
Operation and
display elements
The following illustration is merely an example. The number, arrangement and assign-
ment of the keys and lights may differ from the specific version supplied.
Fig. 2: Example of versions with a control cabinet
Switching on the
pumping station
Open exhaust valve (ball valve), if present.
Turn master switch 9.10 to the "1" position.
Switch on pump stand using key 9.6 on controller.
– The switch-on sequence is specified by the controller.
– Let the pumping station warm up until it reaches operating temperature.
Open shut-off valve in the intake line (ball valve), if present.
Switching off the
pumping station
Close shut-off valve in the intake line (if present).
Switch off pumps by pressing key 9.7; let pumps continue to run if necessary.
9 Control cabinet
9.2 "Pump 1 in operation" lamp
9.3 "Pump 2 in operation" lamp
9.4 "Thermistor protection mal-
function" lamp
9.5 "Fuse tripping phase se-
quence malfunction" lamp
9.6 Pumping station "ON" key
9.7 Pumping station "OFF" key
9.8 Not assigned (option: remote/
manual key-operated switch
9.9 Lamp test
9.10 Master switch
Operating hours counter (internal)
9
9.3
9.2
9.6
9.7
9.10
9.4
9.5
9.9
9.8
Depending on the specific process, during process pauses the pumping station can be
operated continuously and flushed when the intake line is closed.

20
Operation
– The switch-off sequence is specified by the controller.
Close exhaust valve (if present).
NOTICE
Roots pump damage due to the rotors starting up!
Differences in the rate of cooling of the pump housing and rotors can cause damage to
the pump.
If the pump / pumping station is switched off and at a standstill for > 5 minutes, then
only switch it on again after ventilation and a waiting period of at least 120 minutes to
allow a balanced temperature of rotors and housing.