Edwards XDS46i User manual

A731-01-880
Issue C
Original Instructions
Instruction Manual
XDS Dry Pump
Description Electrical Supply Item Number
XDS46i Scroll Pump 100-120 V, 200-230 V, 50/60 Hz, Single Phase A731-01-983
XDS46iC Scroll Pump 100-120 V, 200-230 v, 50/60 Hz, Single Phase A731-01-880

Declaration of Conformity
We, Edwards Limited,
Crawley Business Quarter,
Manor Royal,
Crawley,
West Sussex, RH10 9LW, UK
declare under our sole responsibility, as manufacturer and person within the EU authorised
to assemble the technical file, that the product(s)
XDS35i scroll pump, 100-120V, 200-230V, 50/60Hz, switched to high volts A730-YY-983
XDS35i scroll pump, 100-120V, 200-230V, 50/60Hz, switched to low volts A730-YY-986
XDS46i scroll pump, 100-120V, 200-230V, 50/60Hz, single phase A731-01-983
XDS100B scroll pump, 100-120V, 200-230V, 50/60Hz, single phase A732-01-983
where YY is represented by a two digit number between 01 and 99.
to which this declaration relates is in conformity with the following standard(s) or other
normative document(s)
EN1012-2:1996+A1:2009 Compressors and Vacuum Pumps. Safety Requirements.
VacuumPumps
EN61010-1:2010 Safety Requirements for Electrical Equipment for Measurement,
Control and Laboratory Use. General Requirements
EN61326-1:2013 Electrical equipment for measurement, control and laboratory
(Class A Emissions, Use. EMC requirements. General requirements
Industrial Immunity)
EN50581:2012 Technical Documentation for the Assessment of Electrical and
Electronic Products with respect to the Restriction of Hazardous
Substances
EN13463-1:2009 Non-electrical equipment for use in potentially explosive
atmospheres. Basic method and requirements
EN13463-5:2011 Non-electrical equipment for use in potentially explosive
atmospheres. Protection by constructional safety ‘c’
CAN/CSA-C22.2 Safety requirements for electrical equipment for measurement,
No.61010.1-04 Control and laboratory use – Part 1: General requirements
UL61010-1, 2nd Edition Safety requirements for electrical equipment for measurement,
Control and laboratory use – Part 1: General requirements
and fulfils all the relevant provisions of
2006/42/EC Machinery Directive
2014/35/EU Low Voltage Directive
2014/30/EU Electromagnetic Compatibility (EMC) Directive
2014/34/EU ATEX Directive on use in Potentially Explosive Atmospheres
II 3 G c IIB T4 Internal Atmospheres Only, Tech File ref MPTR 0271
2011/65/EU Restriction of Certain Hazardous Substances (RoHS) Directive
Note: This declaration covers all product serial numbers from the date this Declaration was
signed onwards.
10.08.2015, Burgess Hill
P200-01-400 Issue H
Mr Peter Meares
Senior Technical Support Manager, General Vacuum Date and Place
This product has been manufactured under a quality
management
system
certified to ISO
9001:2008

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Contents
A731-01-880 Issue C
Contents
Section Page
1 Introduction ........................................................................................ 1
1.1 Scope of this manual .................................................................................................... 1
1.2 ATEX directive implications............................................................................................ 2
1.3 Description................................................................................................................ 3
1.4 Gas ballast control ...................................................................................................... 3
1.5 Construction.............................................................................................................. 4
2 Technical data ..................................................................................... 5
2.1 Operating and storage conditions ..................................................................................... 5
2.2 Performance.............................................................................................................. 5
2.2.1 General.................................................................................................................... 5
2.2.2 Performance characteristics ........................................................................................... 6
2.3 Mechanical data ......................................................................................................... 7
2.3.1 General.................................................................................................................... 7
2.3.2 Vibration data............................................................................................................ 7
2.4 Electrical data........................................................................................................... 7
3 Installation ......................................................................................... 9
3.1 Safety...................................................................................................................... 9
3.2 System design considerations......................................................................................... 10
3.3 Unpack and inspect .................................................................................................... 12
3.4 Locate the pump........................................................................................................ 12
3.4.1 Mechanical fixing ....................................................................................................... 12
3.5 Electrical installation .................................................................................................. 12
3.5.1 Check and configure the pump ....................................................................................... 12
3.5.2 Connect the pump to the electrical supply......................................................................... 13
3.6 Inlet and outlet connections .......................................................................................... 13
3.7 Leak test the system ................................................................................................... 14
4 Operation ......................................................................................... 15
4.1 Use of gas ballast control ............................................................................................. 15
4.1.1 Gas ballast control ..................................................................................................... 15
4.2 Start up procedure ..................................................................................................... 15
4.3 To achieve ultimate vacuum.......................................................................................... 16
4.4 To pump condensable vapours ....................................................................................... 16
4.5 Implication of ATEX directive......................................................................................... 16
4.5.1 Flammable/pyrophoric materials .................................................................................... 16
4.5.2 Gas purges ............................................................................................................... 16
4.6 Remote operation using 15-way D connector ...................................................................... 17
4.7 Shut down................................................................................................................ 17
5 Maintenance...................................................................................... 19
5.1 Safety information...................................................................................................... 19
5.2 Maintenance plan....................................................................................................... 20
5.3 Inspect and clean the inlet strainer ................................................................................. 20
5.4 Inspect and clean the gas ballast control........................................................................... 21
5.5 Clean the external fan cover ......................................................................................... 22
5.6 Replace the tip seals................................................................................................... 22
5.7 Test the motor condition.............................................................................................. 23
5.8 Fault finding............................................................................................................. 23
dcs/7740/09/2015

A731-01-880 Issue C
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Contents
5.8.1 The pump has failed to start or has stopped....................................................................... 23
5.8.2 The pump has failed to achieve the required performance ..................................................... 23
5.8.3 The pump is noisy ...................................................................................................... 24
5.8.4 The pump surface temperature is high ............................................................................. 24
5.8.5 The pumping speed is poor or if pump down time is too long................................................... 24
6 Storage and disposal ............................................................................ 25
6.1 Storage ................................................................................................................... 25
6.2 Disposal .................................................................................................................. 25
7 Service and spares............................................................................... 27
7.1 Introduction ............................................................................................................. 27
7.2 Service ................................................................................................................... 27
7.3 Accessories .............................................................................................................. 27
7.3.1 Electrical cables ........................................................................................................ 27
7.3.2 Silencer................................................................................................................... 27
7.3.3 Gas ballast adaptor..................................................................................................... 27
7.3.4 Solenoid operated pipeline valves ................................................................................... 28
7.3.5 Tip seal and exhaust valve service kit............................................................................... 28
For return of equipment, complete the HS Forms at the end of this manual.
Illustrations
Figure Page
1 XDS46i & XDS46iC scroll pump.......................................................................................... 2
2 Performance characteristics ............................................................................................ 6
3 Installation drawing .....................................................................................................11
4 Logic interface schematic..............................................................................................18
5 Inlet strainer assembly .................................................................................................21
6 Gas ballast control assembly...........................................................................................22

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Contents
A731-01-880 Issue C
Tables
Table Page
1 Operating and storage conditions ...................................................................................... 5
2 CSA approval environmental conditions............................................................................... 5
3 General characteristics .................................................................................................. 5
4 Performance characteristics ............................................................................................ 6
5 General mechanical data................................................................................................ 7
6 Vibration data............................................................................................................. 7
7 Electrical ratings for continuous operation........................................................................... 7
8 Recommended fuses ..................................................................................................... 7
9 Pin status on the logic interface connector .........................................................................18
10 Maintenance plan........................................................................................................20
11 Electrical cables .........................................................................................................27
12 Solenoid operated pipeline valves ....................................................................................28
Associated publications
Publication title Publication number
Vacuum Pump and Vacuum System Safety P400-40-100

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A731-01-880 Issue C
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Introduction
A731-01-880 Issue C
1Introduction
1.1 Scope of this manual
This manual provides installation, operation and maintenance instructions for the Edwards XDS46i & 46iC Scroll
pump. The pump must be used as specified in this manual. Read this manual before installing and operating the
pump.
Important safety information is highlighted as WARNING and CAUTION instructions; these instructions must be
obeyed. The use of WARNINGS and CAUTIONS is defined below.
CAUTION
Cautions are given where failure to observe the instruction could result in damage to the equipment, associated
equipment and process.
The units used throughout this manual conform to the SI international system of units of measurement. Pressures are
stated as absolute pressures throughout this manual.
The following warning labels are on the pump:
WARNING
Warnings are given where failure to observe the instruction could result in injury or death to
people.
Warning – refer to accompanying documentation.
Warning – risk of electric shock.
Warning – hot surfaces.

A731-01-880 Issue C
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Introduction
1.2 ATEX directive implications
This equipment is designed to meet the requirements of Group II Category 3 equipment in accordance with the ATEX
Directive concerning equipment and protective systems intended for use in potentially explosive atmospheres.
The ATEX Category 3 applies in respect of potential ignition sources internal to the equipment. An ATEX Category has
not been assigned in respect of potential ignition sources on the outside of the equipment as the equipment has not
been designed for use where there is an external potentially explosive atmosphere.
There is no potential source of ignition within the pump during normal operation but there may be potential sources
of ignition under conditions of foreseeable and rare malfunction as defined in the ATEX Directive. Accordingly,
although the pump is designed to pump flammable materials and mixtures, operating procedures should ensure that
under all normal and reasonably foreseeable conditions, these materials and mixtures are not within explosive limits.
Category 3 is considered appropriate for the avoidance of ignition in the case of a rare malfunction which allows
flammable materials or mixtures to pass through the pump whilst within their explosive limits.
Figure 1 - XDS46i & XDS46iC scroll pump
1. NW40 inlet port
2. Gas ballast control
3. Cooling fan
4. NW25 exhaust port
5. Fan connector
6. Rubber feet
7. Electrical connector
8. Voltage changeover switch cover
9. Run/Standby switch
10. 15-way connector
11. Hour counter
12. Lifting eye

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Introduction
A731-01-880 Issue C
1.3 Description
The XDS46i pump is shown in Figure 1. Refer to Figure 1 for item numbers in brackets in the following descriptions.
The XDS pump is a compact, reliable vacuum pump which is suitable for use on vapour handling processes. The XDS
pump may be used for some pumping applications involving corrosive substances and particulates; for information on
pumping flammable gases, please refer to Section 4.5 and contact Edwards for any further assistance.
The body of the pump includes a fixed scroll and an orbiting scroll. The orbiting scroll is controlled by the electric
motor through an eccentric cam on the motor drive shaft. The movement of the orbiting scroll, meshed with the
fixed scroll, forms successive crescent shaped volumes in the pump. Gas that enters the pump through the inlet is
compressed by the movement of the orbiting scroll and swept towards the centre of the fixed scroll. The compressed
gas enters the exhaust port near the centre of the stationary scroll and is exhausted from the pump through the
outlet.
The XDS is a truly dry vacuum pump, as all the bearings, with hydrocarbon lubricant, are isolated from the vacuum
space.
The pump mechanism is driven directly by a three-phase electric motor. The motor is controlled by an inverter, which
manages the supply of current to the motor in accordance with operating conditions, 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 position in accordance with the power supply being used, refer to Section 3.5.2.
The XDS46i & 46iC is optimised for maximum pumping speed at inlet pressures between 1 mbar and 10 mbar (refer
to Figure 2). The XDS46i is not suitable for prolonged operation at inlet pressures above 40 mbar, for pumpdown of
large volumes, or for rapid cyclic duty. Such operation may cause the pump to become hot or the inverter to reduce
the motor speed. The pump will speed up again after the load is reduced. Maximum rated continuous operating
pressure at 40 °C ambient is 12 mbar.
The pump is air-cooled by a fan (item 3) mounted at the opposite end to the motor. The fan will run on for one minute
after the pump is switched off. The XDS46i & 46iC incorporates a thermal protection device that will stop the motor
in the event of thermal overload, for example, high ambient temperature. The pump will restart after it has cooled
down.
The pump is fitted with an hours counter (item 11), which indicates the total time that the pump has run.
1.4 Gas ballast control
To pump high vapour loads, gas ballast can be delivered into the pump to prevent condensation of the vapour carried
by the pumped gases.
Air can be introduced to the low vacuum stages through the gas ballast control (item 2). Alternatively, 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 Section 7.3.3.
The gas ballast control has three positions:
Closed (position '0')
Low flow (position 'I')
High flow (position 'II')

A731-01-880 Issue C
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Introduction
1.5 Construction
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 construction include fluorocarbon elastomer, nitrile, chemically resistant polymers, nickel and
stainless steel.
The tip seal is a PTFE composite material.

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Technical data
A731-01-880 Issue C
2Technicaldata
2.1 Operating and storage conditions
Note: To comply with EN61010 and CSA standards, the pump must be installed and used indoors, and within the
operating conditions specified in Table 1.
2.2 Performance
2.2.1 General
Note: If the pump is operated outside the specified limits the pump housing may become hot, the inverter may
reduce the motor speed and the tip seal wear rate will be increased.
WARNING
If the XDS46i is operated outside the specified limits, the pump housing may become hot.
Table 1 - Operating and storage conditions
Operating and storage conditions XDS46i
Ambient temperature range (operation) +10 °C to +40 °C
Maximum surface temperature of pump body under normal operating conditions
and maximum ambient temperature
+40 °C to +65 °C
Maximum humidity (operation) 90% RH
Ambient temperature range (storage) –30 °C to +70 °C
Table 2 - CSA approval environmental conditions
CSA approval environmental conditions
Pollution Pollution degree 2
Installation Installation category II
Altitude restriction Max 2000 m
Area of use Indoor use
Tab le 3 - G en e ra l c h a ra ct e r is ti c s
General XDS46i & 46iC
Nominal peak pumping speed 40 m3/h
Maximum permitted continuous inlet pressure 40 mbar
Maximum permitted continuous exhaust pressure 1.2 bar(a)
Maximum permitted inlet pressure for short duration 1.5 bar(a)
Maximum permitted gas ballast inlet pressure 1.5 bar(a)
Maximum chamber volume to pump down from atmospheric pressure 100 litres
Maximum chamber volume for cyclic duty - maximum 6 cycles per hour 50 litres
Suckback protection By exhaust valve
Maximum pressure rise when stopped, with no inlet or gas ballast flow 5 mbar
Leak tightness <1x10-6 mbar l s-1

A731-01-880 Issue C
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Technical data
2.2.2 Performance characteristics
The position of the gas ballast control defines the performance characteristics of the pump. These performance
characteristics are listed in Table 4.
Figure 2 - Performance characteristics
Note: XDS46i is not suitable for prolonged operation at inlet pressures above 40 mbar. Under such conditions, the
inverter may reduce the motor speed.
Table 4 - Performance characteristics
Pump Gas ballast
control position
Ultimate total
pressure (mbar)
Gas ballast
flow (l min–1)
XDS46i 0 <0.05 –
1<0.083
2 <10 12

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Technical data
A731-01-880 Issue C
2.3 Mechanical data
2.3.1 General
2.3.2 Vibration data
2.4 Electrical data
Note: Time-lag fuses should be used, as the initial inrush current can exceed rated values briefly when pump is
started.
Table 5 - General mechanical data
Parameter XDS46i &46iC
Overall dimensions (L x W x H) 476 x 333 x 396 mm
Maximum tilt angle 10 degrees
Nominal rotational speed 1750 rpm
Mass 48 kg
Inlet connection NW40
Outlet connection NW25
Degree of protection (IEC60529) IP44
Tab le 6 - Vi b rat io n d at a
Parameter XDS46i & 46iC
Sound pressure, measured at ultimate vacuum 1 metre from the end of the pump
to ISO 3744 and ISO 4871
55.4 ± 2.5 dB(A)
Vibration: measured at the inlet port (ISO 3744) Class 1C…< 4.5 mms–1 (rms)
Table 7 - Electrical ratings for continuous operation
Pump Supply (V) Phase Frequency (Hz) Current (A)
XDS46i & 46iC 200/230 Single 50/60 6.6
100/120 Single 50/60 10.6
Table 8 - Recommended fuses
Area Voltage Rating
UK 230 V 13 A
Europe 230 V 16 A
US 110 V 20 A
Japan 100 V 20 A

A731-01-880 Issue C
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Installation
A731-01-880 Issue C
3 Installation
3.1 Safety
A suitably trained and supervised technician must install the pump.
Ensure that the installation technician is familiar with the safety procedures that relate to the products
handled by the pumping system.
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 starting installation work.
Disconnect other components in the pumping system from the electrical supply so that they cannot be
operated accidentally.
Refer to the Vacuum Pump and Vacuum System Safety manual (publication number P400-40-100) before
installing and using the pump to process hazardous or flammable 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 starting work.
Do not reuse O-rings or seals.
Leak test the system after installation 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 lifting equipment should be attached to the lifting eye on the pump.
Loose slings should not be used to lift the XDS46i & 46iC.
WARNING
Obey the safety instructions in this section and take note of appropriate precautions. Failure to
observe these instructions 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 Edwards XDS46i pump is not recommended for pumping explosive gases or hazardous
substances.
WARNING
Use suitable lifting equipment to move the XDS46i pump. The mass of the pump is approximately
48 kg.
WARNING
Take care when moving the pump into position. The pump's weight makes it difficult to slide and
movement should be attempted using two people.

A731-01-880 Issue C
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Installation
3.2 System design considerations
Consider the following points when designing the pumping system:
Use a suitable valve to isolate the pump from the vacuum system if pump warm up is required before pumping
condensible vapours or 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.
Ensure the exhaust pipeline cannot become blocked. If an exhaust isolation valve is fitted, ensure the pump cannot
be operated with the valve closed. Refer to Section 3.6.
Dilute dangerous gases to safe concentrations by providing an inert gas purge when shutting down the pumping
system. Refer to Section 4.5.2.

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Installation
A731-01-880 Issue C
Figure 3 - Installation drawing

A731-01-880 Issue C
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Installation
3.3 Unpack and inspect
Remove all packing materials, remove the pump from its packing box, remove the protective covers from the inlet
and outlet ports and inspect the pump.
If the pump is damaged, notify the supplier and carrier in writing within three days; state the Item Number of the
pump together with the order number and supplier's invoice number. Retain all packing materials for inspection. Do
not use the pump if it is damaged.
If the pump is not to be used immediately, replace the protective covers. Store the pump in suitable conditions, as
described in Section 6.1. Refer to Section 6.2 for disposal of materials.
3.4 Locate the pump
Provide a firm, level platform for the pump. Locate the pump so that the gas ballast control and the Run/Standby
switch are accessible.
If the pump will be located inside an enclosure, ensure there is adequate ventilation at both ends of the pump, so
that the ambient temperature around the pump does not exceed 40 °C. A minimum space of 25 mm between the
pump and the enclosure walls is required.
3.4.1 Mechanical fixing
Note: Use the four holes located on each corner of the pump base to secure the pump, if required. Edwards
recommends the use of M8 bolts.
3.5 Electrical installation
3.5.1 Check and configure the pump
CAUTION
Unplug the power supply before changing the voltage. Failure to configure the pump electrical supply correctly
can result in damage to the pump.
Ensure that the voltage shown on the voltage indicator (refer to Figure 1, item 8) on the motor cover corresponds
with the electrical supply voltage. If not, change the configuration of the pump motor to match the supply voltage
using the following procedure.
1. Undo the two screws and lift off the voltage indicator moulding.
2. Rotate the voltage indicator moulding so that the correct voltage is uppermost.
3. Replace the two screws.
WARNING
Use suitable lifting equipment to move the pump. Failure to do so can cause injury to people and
damage to the equipment. Refer to Section 2.3.1 for the mass of the pump.
WARNING
If the pump is to be used on the floor of a work area, position the power lead and the exhaust and
inlet hoses with care. Ensure that personnel in the area are aware of any obstructions around the
pump.

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Installation
A731-01-880 Issue C
3.5.2 Connect the pump to the electrical supply
For recommended fuse ratings, refer to Table 8 in Section 2.4.
CAUTION
If using an overload circuit breaker it must be of a time lag type because of high start up current.
CAUTION
If using an earth leakage device, for example, an RCD, use a 30 mA rated unit at minimum to avoid tripping
during start up.
The pump will automatically restart after restoration of the power supply following power failure.
Make the electrical connections to the pump motor with an IEC60320 cable socket (C19) that satisfies local electrical
standards. To ensure CSA/UL compliance a suitable approved mains supply cord must be used; refer to Table 11 for
parts available from Edwards.
The diameter of the outer sheath of the electrical cable must be within the range 7.0 mm to 10.5 mm. The cable
must conform in size and colour coding with local and national electrical installation regulations. The temperature
rating of the cable must be 70 °C or greater.
3.6 Inlet and outlet connections
Refer to Figure 1. Before connecting the pump to the vacuum system, remove the plastic cap from the inlet and the
exhaust, and ensure that the inlet strainer is fitted to the pump inlet port. Use appropriate NW40 vacuum fittings for
connection to the system.
Take note of the following information when connecting the pump to the vacuum system.
To minimise noise and exhaust emissions, it is recommended that the pump is connected to an exhaust line
or a silencer (refer to Section 7.3.2).
For optimum pumping speeds, ensure that the pipeline connected to the pump inlet is as short as possible
and has a suitable internal diameter.
Support the vacuum pipeline to prevent loading of the coupling joints.
If the pump is operated with the exhaust line blocked, a pressure of 5.5 bar(a) may be generated in the
exhaust pipework. Connect the pump using appropriate pipework and fittings.
WARNING
Ensure that the XDS pump electrical installation conforms to local and national safety
requirements. It must be connected to a suitably fused and protected electrical supply with a
suitable earth (ground) point.
WARNING
If pumping dangerous gases or vapours, connect the exhaust to a suitable treatment plant to
prevent the discharge of dangerous gases and vapours to the surrounding atmosphere.
WARNING
If the pump is operated with the exhaust line blocked, high pressure may be generated in the
exhaust line pipework.

A731-01-880 Issue C
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Installation
If necessary, incorporate flexible bellows in the system pipelines to reduce the transmission of vibration and
prevent loading of the coupling joints. If using flexible bellows, ensure the use of bellows that have a
maximum pressure rating which is greater than the highest pressure that can be generated in the system.
The use of Edwards bellows is recommended.
Incorporate an inlet isolation valve in the pipeline between the vacuum system and pump. This will isolate
the vacuum system from the pump when it is switched off and prevent the suck-back of process gases and
debris into the vacuum system.
Ensure that the sealing surfaces are clean and scratch-free.
Edwards recommends the use of an exhaust extraction system suitable for use with all process gases being pumped.
Ensure that the exhaust extraction system cannot become blocked or obstructed when the pump is operating.
A small amount of tip seal wear product may collect in the exhaust duct of the pump. The dust may be blown out
with the initial burst of air after the pump has been vented. This is quite common and the amount of dust seen will
reduce over time.
3.7 Leak test the system
Leak test the system and seal any leaks found after installing the XDS pump.