Edwards xds35i User manual

Scroll Pumps
XDS35i, XDS35iC, XDS35iE and
XDS35iCE
INSTRUCTION MANUAL
A73001880_M Original instrucons
edwardsvacuum.com
DESCRIPTION ELECTRICAL SUPPLY ITEM NUMBER
XDS35i Scroll Pump (set to high
volts)
100-120 V, 200-230 V, 50/60 Hz - Set to 200 - 230 V A730YY983
XDS35i Scroll Pump (set to low volts) 100-120 V, 200-230 V, 50/60 Hz - Set to 100 - 120 V A730YY986
XDS35i Scroll Pump 100-120 V, 200-230 V, 50/60 Hz - Set to 200 - 230 V A7300983
XDS35iC Scroll Pump Chemical 100-120 V, 200-230 V, 50/60 Hz - Set to 200 - 230 V A73006938
XDS35i Scroll Pump (No Gas Ballast) 100-120 V, 200-230 V, 50/60 Hz - Set to 200 - 230 V A73005983
XDS35iE Scroll Pump Enhanced 100-120 V, 200-230 V, 50/60 Hz - Set to 200 - 230 V A73003983
XDS35iCE Scroll Pump Enhanced
Chemical
100-120 V, 200-230 V, 50/60 Hz - Set to 200 - 230 V A730983
XDS35iE Scroll Pump Enhanced (No
Gas Ballast)
100-120 V, 200-230 V, 50/60 Hz - Set to 200 - 230 V A73007983

Copyright noce
©Edwards Limited 2020. All rights reserved.
Trademark credit
Edwards and the Edwards logo are trademarks of Edwards Limited, Innovaon Drive,
Burgess Hill, West Sussex RH15 9TW.
Associated publicaons
Publicaon tle Publicaon number
Vacuum Pump and Vacuum System Safety P40040100
Tip Seal Replacement Kit Manual A73001840
By‑pass Valves Exchange Manual A73001860
Disclaimer
The content of this manual may change from me to me without noce. We accept no
liability for any errors that may appear in this manual nor do we make any expressed or
implied warranes regarding the content. As far as praccal we have ensured that the
products have been designed and constructed to be safe and without risks when
properly installed and used in accordance with their operang instrucons.
We accept no liability for loss of prot, loss of market or any other indirect or
consequenal loss whatsoever.
Product warranty and limit of liability are dealt with in our standard terms and
condions of sale or negoated contract under which this document is supplied.
You must use this product as described in this manual. Read the manual before you
install, operate, or maintain the product.
Page 2

CE Declaration of Conformity
P20001400N
The following product
XDS35i scroll pump, set to High volts
100-120 V, 200-230 V, 1 ph, 50/60 Hz
A730-YY-983
XDS35i scroll pump, set to Low volts
100-120 V, 200-230 V, 1 ph, 50/60 Hz
A730-YY-986
XDS35i scroll pump, no gas ballast
100-120 V, 200-230 V, 1 ph, 50/60 Hz
A730-05-983
XDS35iC scroll pump
100-120 V, 200-230 V, 1 ph, 50/60 Hz
A730-06-983
XDS35iE scroll pump, enhanced
100-120 V, 200-230 V, 1 ph, 50/60 Hz
A730-03-983
XDS35iE scroll pump, enhanced, no gas ballast
100-120 V, 200-230 V, 1 ph, 50/60 Hz
A730-07-983
XDS35iCE scroll pump, enhanced
100-120 V, 200-230 V, 1 ph, 50/60 Hz
A730-08-983
XDS46i scroll pump
100-120 V, 200-230 V, 1 ph, 50/60 Hz
A731-01-983
XDS46iC scroll pump
100-120 V, 200-230 V, 1 ph, 50/60 Hz
A731-06-983
II Internal 3 G Ex h IIB T4 Gc
YY = 00 to 99
XDS100B scroll pump Note: no ATEX rating
100-120 V, 200-230 V, 1 ph, 50/60Hz
A732-01-983
Is in conformity with the relevant requirements of European CE legislation:
2006/42/EC
Machinery directive
2014/34/EU
ATEX directive on use in potentially explosive atmospheres
2014/30/EU
Electromagnetic compatibility (EMC) directive
2011/65/EU
Restriction of certain hazardous substances (RoHS) directive
as amended by Delegated Directive (EU) 2015/863
Based on the relevant requirements of harmonised standards:
EN 1012-2:1996 +A1:2009
Compressors and vacuum pumps. Safety requirements. Vacuum pumps
EN ISO 80079-36:2016
Explosive atmospheres – Part 36: Non-electrical equipment for explosive atmospheres.
Basic method and requirements
EN ISO 80079-37:2016
Explosive atmospheres - Part 37: Non-electrical equipment for explosive atmospheres --
Non-electrical type of protection constructional safety ''c'', control of ignition sources ''b'',
liquid immersion ''k''
EN 61326-1:2013
Electrical equipment for measurement, control and laboratory use. EMC requirements.
General requirements
Class A Emissions, Industrial Immunity
Documentation Officer:
Jelena Havelkova, Spielberk Office Centre, Holandska 10, Brno, 63900 Czech Republic,

: [phone],

: [email protected]
This declaration, based on the requirements of the listed Directives and EN ISO/IEC 17050-1, covers all product
serial numbers from this date on: 29th October 2019
Petr Smerek – Engineering Manager
Scientific Vacuum Division
Lutin
Ian Keech – General Manager
Product Company
Lutin
Edwards Ltd
Innovation Drive
Burgess Hill
West Sussex
RH15 9TW
UK

This product has been manufactured under a quality management system certified to ISO 9001:2015
Additional Legislation and Compliance Information
EU EMC Directive: Class A/B Industrial equipment
Caution: This equipment is not intended for use in residential environments and may not provide adequate protection to
radio reception in such environments.
EU RoHS Directive: Material Exemption Information
This product is compliant with the following Annex III Exemptions:
•6(b) Lead as an alloying element in aluminium containing up to 0.4% by weight
•6(c) Copper alloy containing up to 4% lead by weight
EU REACH Regulation Compliance
This product is a complex article which is not designed for intentional substance release. To the best of our knowledge
the materials used comply with the requirements of REACH. The product manual provides information and instruction to
ensure the safe storage, use, maintenance and disposal of the product including any substance based requirements.
Article 33.1 Declaration
This product does contain Candidate List Substances of Very High Concern above 0.1%ww by article as clarified under the
2015 European Court of Justice ruling in case C-106/14.
•Lead (Pb) added to the Candidate List June 2018
As indicated by the applied RoHS exemption(s) above this substance is present in aluminium and brass components.
ADDITIONAL INFORMATION
The products listed are also in scope for and comply with the requirements of the following:
2012/19/EU
Directive on waste electrical and electronic equipment (WEEE)
Product is certified to
CSA-C22.2 No.61010-1-12
Safety requirements for electrical equipment for measurement, control and
laboratory use – Part 1: General requirements
Product conforms to
UL61010-1 3
rd
Edition
Safety requirements for electrical equipment for measurement, control and
laboratory use – Part 1: General requirements
材料成分声明
China Material Content Declaration
有害物质
Hazardous Substances
部件名称
Part name
铅
Lead
(Pb)
汞
Mercury
(Hg)
镉
Cadmium
(Cd)
六价铬
Hexavalent
Chromium
(Cr VI)
多溴联苯
Polybrominated
biphenyls
(PBB)
多溴二苯醚
Polybrominated
diphenyl ethers
(PBDE)
铸铝及铝合金制品
Aluminium alloys
X O O O O O
铜管管件
Brass pipe fitting
X O O O O O
铜接头
Brass connectors
X O O O O O
O: 表示该有害物质在该部件的所有均质材料中的含量低于 GB/T 26572 标准规定的限量要求。
O: Indicates that the hazardous substance contained in all of the homogeneous materials for this part is below the limit
requirement in GB/T 26572.
X: 表示该有害物质在该部件的至少一种均质材料中的含量超出 GB/T26572 标准规定的限量要求。
X: Indicates that the hazardous substance contained in at least one of the homogeneous materials used for this part is
above the limit requirement of GB/T26572.

Contents
1. Safety and compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.1 Denion of Warnings and Cauons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2 Safety symbols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2. Introducon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 Scope of this manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 ATEX direcve implicaon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Descripon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4 Gas ballast control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.5 Construcon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3. Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1 Operang and storage condions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2 Performance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2.1 Performance characteriscs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.3 Mechanical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.4 Electrical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.4.1 Electrical cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4. Installaon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.1 Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.2 System design consideraons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.3 Unpack and inspect. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.4 Locate the pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.4.1 Mechanical xing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.5 Electrical installaon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.5.1 Check and congure the pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.5.2 Connect the pump to the electrical supply. . . . . . . . . . . . . . . . . . . . . 20
4.6 Inlet and outlet connecons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.7 Leak test the system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5. Operaon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.1 Use of gas ballast control (if ed). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.1.1 Gas ballast control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.2 Start up procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.3 To achieve ulmate vacuum (if gas ballast ed). . . . . . . . . . . . . . . . . . . . . . 23
5.4 To pump condensable vapours (if gas ballast ed). . . . . . . . . . . . . . . . . . . . 23
5.5 Implicaon of ATEX direcve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.5.1 Flammable/pyrophoric materials. . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.5.2 Gas purges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Page 3

5.6 Remote operaon using 15-way D connector. . . . . . . . . . . . . . . . . . . . . . . . . 24
5.7 Shut down. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6. Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.1 Safety informaon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.2 Maintenance plan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.3 Inspect and clean the inlet strainer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.4 Inspect and clean the gas ballast control (if ed). . . . . . . . . . . . . . . . . . . . . 28
6.5 Clean the external fan cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.6 Replace the p seals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.7 Test the motor condion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7. Fault nding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.1 The pump has failed to start or has stopped. . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.2 The pump has failed to achieve the required performance. . . . . . . . . . . . . . 31
7.3 The pump is noisy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.4 The pump surface temperature is high. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7.5 The pumping speed is poor or if pump down me is too long. . . . . . . . . . . . 32
8. Storage and disposal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8.1 Storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8.2 Disposal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
9. Service and spares. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9.1 Introducon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9.2 Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9.2.1 Electrical cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9.2.2 Silencer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9.2.3 Gas ballast adaptor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9.2.4 Solenoid operated pipeline valves. . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9.3 Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
9.3.1 Return the equipment or components for service . . . . . . . . . . . . . . 35
9.4 Service kits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
9.4.1 Tip seal and exhaust service kit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
9.4.2 Bypass valve kit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
9.4.3 Gas ballast kit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Page 4

List of Figures
Figure 1: General view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 2: Performance characteriscs of XDS35i. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 3: Performance characteriscs of XDS35iE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 4: Installaon drawing (dimensions in mm). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 5: Logic interface schemac. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 6: Inlet strainer assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 7: Gas ballast control assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Page 5

1. Safety and compliance
1.1 Denion of Warnings and Cauons
NOTICE:
This manual meets our obligaon to provide you with informaon. For safe operaon
from the start, read these instrucons carefully before you install or commission the
equipment.
Read all the safety instrucons in this secon and the rest of this manual carefully
and make sure that you obey these instrucons. The equipment must only be
operated and maintained by trained personnel in the proper condion and as
described in this instrucon manual.
Obey local and state requirements and regulaons. If you have any quesons about
safety, operaon or maintenance of the device, please contact our nearest subsidiary.
Important safety informaon is highlighted as warning and cauon instrucons. Obey
these instrucons.
WARNING:
If you do not obey a warning, there is a risk of injury or death. Dierent symbols are
used according to the type of hazard.
CAUTION:
If you do not obey a cauon, there is a risk of minor injury, damage to equipment,
related equipment or process.
NOTICE:
Informaon about properes or instrucons for an acon which, if ignored, will
cause damage to the pump or the system.
We reserve the right to change the design and the stated data. The illustraons are not
binding.
Keep the instrucons for future use.
1.2 Safety symbols
The safety symbols on the products shows the areas where care and aenon is
necessary.
The safety symbols that follow are used on the product or in the product
documentaon.
Page 6
A73001880_M - Safety and compliance

Warning/Cauon
A safety instrucon which must be followed.
Warning - Heavy object
Idenes a possible hazard from a heavy object.
Warning - Dangerous voltage
Idenes possible hazards from dangerous voltages.
Warning - Hot surfaces
Idenes a potenal hazard from a hot surface.
Warning - Use protecve equipment
Use appropriate protecve equipment.
Page 7
A73001880_M - Safety and compliance

2. Introducon
2.1 Scope of this manual
This manual provides installaon, operaon and maintenance instrucons for the
XDS35i, XDS35iC, XDS35iE, and XDS35iCE scroll pumps. The pump must be used as
specied in this manual. Read this manual before installing and operang the pump.
2.2 ATEX direcve implicaon
This equipment is designed to meet the requirements of Group II Category 3 equipment
in accordance with Direcve 2014/34/EU of the European Parliament and the Council of
29th March 2014 on the approximaon of the laws of the Member States concerning
equipment and protecve systems intended for use in potenally explosive
atmospheres. (The ATEX Direcve)
The ATEX Category 3 applies in respect of potenal ignion sources internal to the
equipment. An ATEX Category has not been assigned in respect of potenal ignion
sources on the outside of the equipment as the equipment has not been designed for
use where there is an external potenally explosive atmosphere.
There is no potenal source of ignion within the pump during normal operaon but
there may be potenal sources of ignion under condions of foreseeable and rare
malfuncon as dened in the Direcve. Accordingly, although the pump is designed to
pump ammable materials and mixtures, operang procedures should ensure that
under all normal and reasonably foreseeable condions, these materials and mixtures
are not within explosive limits. Category 3 is considered appropriate for the avoidance of
ignion in the case of a rare malfuncon which allows ammable materials or mixtures
to pass through the pump whilst within their explosive limits.
Page 8
A73001880_M - Introducon

Figure 1 General view
1. NW40 inlet port 2. Gas ballast control (not ed on No Gas
Ballast variant)
3. Cooling fan 4. NW25 exhaust port
5. Fan connector 6. Rubber feet
7. Electric connector 8. Voltage changeover switch cover
9. Run/Standby switch 10. 15‑way connector
11. Hour counter 12. Liing eye
1. NW40 inlet port 2. Gas ballast control (not ed on No Gas
Ballast variant)
3. Cooling fan 4. NW25 exhaust port
5. Fan connector 6. Rubber feet
7. Electric connector 8. Voltage changeover switch cover
9. Run/Standby switch 10. 15‑way connector
11. Hour counter 12. Liing eye
2.3 Descripon
Refer to Figure: General view on page 9 for item numbers in brackets in the following
descripons.
The XDS pump is a compact, reliable vacuum pump which is suitable for use on vapour
handling processes. It may be used for some pumping applicaons involving corrosive
substances and parculates, for informaon on pumping ammable gases, please refer
to Implicaon of ATEX direcve on page 23 and contact us for any further assistance.
The body of the pump includes a xed scroll and an orbing scroll. The orbing scroll is
controlled by the electric motor through an eccentric cam on the motor drive sha. The
movement of the orbing scroll, meshed with the xed scroll, forms successive crescent
shaped volumes in the pump. Gas that enters the pump through the inlet is compressed
by the movement of the orbing scroll and swept towards the centre of the xed scroll.
The compressed gas enters the exhaust port near the centre of the staonary scroll and
is exhausted from the pump through the outlet.
The XDS is a dry vacuum pump, as all the bearings, with their hydrocarbon lubricant, are
isolated from the vacuum space.
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A73001880_M - Introducon

The pump has an NW40 (item 1) inlet and inlet strainer.
The pump mechanism is driven directly by a three‑phase electric motor. The motor is
controlled by a drive, which manages the supply of current to the motor in accordance
with operang condions and allows the pump to be connected to a single phase
supply. The voltage changeover switch beneath the voltage changeover switch cover
(item 8) must be set to the correct posion in accordance with the power supply being
used, refer to Connect the pump to the electrical supply on page 20.
The pump is designed to run from atmospheric pressure however, if the inlet pressure
exceeds 100 mbar for an extended period, the inverter may reduce the motor speed.
The pump will speed up again aer the pressure is reduced. Maximum rated connuous
operang pressure at 40 °C ambient is 40 mbar.
The enhanced pump versions (XDS35iE and 35iCE) are equipped with patented
technology which prevents over‑compression within the scroll mechanism at high
operaonal pressure and large throughput applicaons. Twin by‑pass valves release
suciently compressed gas directly to the pump exhaust, increasing pump eciency,
lowering power consumpon and enhancing pumping speed. Valve operaon occurs at
inlet pressures greater than 300 mbar, meaning the pump is tailored towards
applicaons which dwell at higher pressure. The eliminaon of over‑compression at high
operaonal pressure, reduces power consumpon and diminishes bearing loads,
extending bearing life. Consequently, the enhanced versions are capable of operaon
without limitaons to both the size of vacuum chamber, or the frequency of pump down
on cyclic dues.
Note:
The pump modicaons within the enhanced version have a small adverse eect on the
ulmate vacuum achieved however, the pump has a larger tolerance to operang
altude and ambient temperature.
The pump is air‑cooled by a fan (item 3) mounted at the opposite end to the motor. The
fan will connue to run for one minute aer the pump is switched o. The pump
incorporates a thermal protecon device that will stop the motor in the event of thermal
overload, for example, high ambient temperature. The pump will restart aer cooling
down.
2.4 Gas ballast control
To pump high vapour loads, gas ballast can be delivered into the pump to prevent
condensaon of the vapour carried by the pumped gases.
Air can be introduced to the low vacuum stages through the gas ballast control (item 2)
(not ed on the No Gas Ballast variant). Alternavely, an inert gas such as nitrogen can
be supplied through a suitable external valve and by using the appropriate adaptor,
available as an accessory, refer to Gas ballast adaptor on page 34.
The gas ballast control has three posions:
▪Closed (posion '0')
▪Low ow (posion 'I')
▪High ow (posion 'II')
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A73001880_M - Introducon

2.5 Construcon
The pump scrolls are made of anodised aluminium. The motor housing is aluminium. All
surfaces of the pump which are exposed to the pumped gases are free from copper, zinc
and cadmium.
Other materials of construcon include uorocarbon elastomer, nitrile, chemically
resistant polymers, nickel, stainless steel and a PTFE composite material.
Page 11
A73001880_M - Introducon

3. Technical data
WARNING:
If the pump is operated outside the specic limits, the pump housing may become
hot.
3.1 Operang and storage condions
Table 1
Operang and storage condions
Ambient temperature range (operaon) + 10 °C to + 40 °C
Maximum surface temperature of pump body
under normal operang condions and
maximum ambient temperature
+ 40 °C to + 65 °C
Maximum humidity (operaon) 90% RH
Ambient temperature range (storage) - 30 °C to + 70 °C
Polluon Polluon degree 2
Installaon Installaon category II
Altude restricon UL/CSA approved maximum 2000 m
(3000 m for E variant self cered)
Area of use Indoor use
3.2 Performance
Table 2
General characteriscs
Maximum pumping speed 35 m3/h
Maximum permied connuous inlet pressure 40 mbar
(1000 mbar for E variant)*
Maximum permied connuous exhaust
pressure 0.2 bar (g)
Maximum permied gas ballast inlet pressure 0.5 bar (g)
Maximum chamber volume to pump down from
atmospheric pressure 100 litres†
Maximum chamber volume for cyclic
duty‑maximum 6 cycles per hour 50 litres†
Maximum inial pressure rise with no gas
ballast ow 5 mbar l
Suck‑back protecon By exhaust valve
Leak ghtness < 1 x 10-6 mbar l s-1
Maximum displacement 44 m3/hr
Page 12
A73001880_M - Technical data

Sound pressure, measured at ulmate vacuum
1 metre from the end of the pump to ISO 3744
and ISO 4871
57 dB (A)
Vibraon: measured at the inlet port (ISO 3744) Class 1C...< 4.5 mm s-1 (rms radial)
*Use at higher inlet pressure speeds up the p seal wear.
†Enhanced version is not limited for maximum chamber volume or number of cycles per
hour.
3.2.1 Performance characteriscs
The posion of the gas ballast control denes the performance characteriscs of the
pump.
Note:
Does not apply to No Gas Ballast variants
Table 3
Performance characteriscs
Gas ballast control
posion
XDS35i Ulmate
total pressure
(mbar)
XDS35iE Ulmate
total pressure
(mbar)
Gas ballast ow
(l min-1)
0 < 0.01 < 0.03 -
1 < 0.02 < 0.04 3
2 < 10.0 < 10.0 12
Figure 2 Performance characteriscs of XDS35i
Note:
XDS35i can operate with high peak power for 90 seconds before acvaon of a thermal
protecon algorithm which reduces rotaonal and pumping speed.
Page 13
A73001880_M - Technical data

Figure 3 Performance characteriscs of XDS35iE
The power consumpon of the enhanced version at high inlet pressure can be lowered
by a further 100 W more with the installaon of a second exhaust silencer by an
NW25 T‑piece.
Table 4 Typical pump down mes of XDS35iE
Chamber size [m3]Pump down me [minutes]
1 14.5
3 43.3
10 144.3
30 432.7
The XDS35iE is suitable for regular, rapid pumping of small chambers or for evacuaon of
large volumes with no maximum chamber limit.
3.3 Mechanical data
Table 5 General mechanical data
Overall dimensions (L x W x H) 476 x 333 x 396 mm
Maximum lt angle 10 degrees
Nominal rotaonal speed 1750 rpm
Mass 48 kg
Inlet connecon NW40
Outlet connecon NW25
Degree of protecon (IEC60529) IP44
3.4 Electrical data
Pumps are supplied set to 200 ‑ 230 V.
Page 14
A73001880_M - Technical data

Table 6 Electrical data
Supply (V) Phase Frequency (Hz) Current (A)
200 ‑ 230 Single 50 - 60 6.6
100 ‑ 120 Single 50 - 60 10.6
Table 7 Recommended regional supply protecon
Area Voltage Rang
UK 230 V 13 A
Europe 230 V 16 A
US 120 V 15 A
Japan 100 V 15 A
3.4.1 Electrical cables
Recommended cordsets and fuses for regional requirements.
Table 8
Recommended cordsets
Descripon Rang Coupler type Item number
Cord set
assembly, UK
Cable Style = H05VV‑F, 3 x 1.5 mm2,
300 V, 70 °C, maximum length of
2.5 metres Straight entry A50505003
Plug Type = BS1363 UK plug
Appliance coupler = IEC60320 style
C19 Right angled
entry A50505006
Fuse Type = BS1362 13 amp fuse, to
an IEC60320 style
Cord set
assembly, Europe
Cable Style = H05VV‑F, 3 x 1.5 mm2,
300 V, 70 °C, maximum length of
2.5 metres Straight entry A50506003
Plug Type = European Schuko VDE
approved, 16 A 250 V rated with
dual earthing contact
Appliance coupler = IEC60320
style C19
Right angled
entry A50506006
Cord set
assembly,
USA/Canada
(200 ‑ 230 V)
Cable style = SJT, 3 x 14 AWG, 300 V,
90 °C, VW‑1 maximum length of
3 metres
N/A
Plug Type = NEMA, 6‑15P plug
Appliance coupler = IEC
60320 style C19
Page 15
A73001880_M - Technical data

4. Installaon
4.1 Safety
WARNING:
Obey the safety instrucons in this secon and take note of appropriate precauons.
Failure to observe these instrucons may result in injury to people and damage to
equipment.
WARNING:
Do not expose any part of the human body to vacuum as it can cause injury.
WARNING:
The pump is not recommended for pumping explosive gases or hazardous
substances.
WARNING:
Use suitable liing equipment to move the pump. The mass is approximately 48 kg.
WARNING:
Take care when moving the pump into posion. The pump's weight makes it dicult
to slide and movement should only be aempted by two people.
▪ A suitably trained and supervised technician must install the pump.
▪ Ensure that the installaon technician is familiar with the safety procedures that
relate to the products processed by the pump.
▪ Wear the appropriate safety clothing when coming into contact with contaminated
components.
▪Dismantle and clean contaminated components inside a fume cupboard.
▪Vent and purge the vacuum system before starng installaon work.
▪Disconnect other components in the pump from the electrical supply so that they
cannot be operated accidentally.
▪Refer to the Vacuum Pump and Vacuum System Safety manual (publicaon
number P40040100) before installing and using the pump to process hazardous or
ammable materials.
▪Safely route any electrical cables and pipes to prevent a trip hazard.
▪Check all required components are available and are of the correct type before
starng work.
▪Do not reuse O‑rings or seals.
Page 16
A73001880_M - Installaon

▪ Leak test the system aer installaon is complete and seal any leaks found to
prevent leakage of hazardous substances out of the system and leakage of air into
the system.
▪ Mechanical liing equipment should be aached to the liing eye on the pump.
▪ Loose slings should not be used to li the pump.
4.2 System design consideraons
WARNING:
Ensure the exhaust pipeline cannot become blocked. If an exhaust isolaon valve is
ed, ensure the pump cannot be operated with the valve closed.
Consider the following points when designing the pumping system:
We recommend the use of a foreline vacuum isolaon valve to allow the pump to warm
up before pumping condensible vapours or if the vacuum needs to be maintained when
the pump is not running.
Avoid high levels of heat input into the pump from the process gases, otherwise the
pump may overheat and cause the thermal overload device to open.
If the pump is used in a high ambient temperature with high gas throughput, the pump
body temperature may approach 65 °C. We recommend the use of addional guarding
to prevent contact with hot surfaces under these condions.
Dilute ammable mixtures to safe concentraons by providing an inert gas diluon
purge. Contact our applicaons team for further advice on diluon requirements if
required.
Page 17
A73001880_M - Installaon

Figure 4 Installaon drawing (dimensions in mm)
Page 18
A73001880_M - Installaon