Where x = 0 or 2 depending on TMS system
Where y = 0, 1, 3 or 4 depending on gas module type
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.
Part 2 - Vacuum Pumps.
EN61010-1: 2010 Safety Requirements for Electrical Equipment for Measurement,
EN 61326-1: 2013 Electrical equipment for measurement, control and laboratory
EN50581: 2012 Technical Documentation for the Assessment of Electrical and Electronic
CAN/CSA-C22.2 Safety requirements for electrical equipment for measurement,
No.61010-1-12 Control and laboratory use – Part 1: General requirements
UL61010-1, 2
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
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.
14.05.2015, Burgess Hill
Where z = 0, 1, 4 or 5 depending on installation options
Control and Laboratory Use. Part 1 - General Requirements.
Use - EMC requirements. (Industrial Location Immunity - Class A Emissions)
Products with respect to the Restriction of Hazardous Substances
nd
Edition Safety requirements for electrical equipment for measurement, Control and
Malcolm Gray, Technical Manage
laboratory use – Part 1: General requirements
Dry Pumps
Date and Place
J
This product has been manufactured under a quality management system certified to ISO9001:2008
P200-03-980 Issue
Page 4
P200-05-100
Issue B
Product Information for China
The Chinese regulatory requirement on the Control of Pollution Caused by Electronic Information Products No.
39 (also known as ‘China RoHS’) mandates that manufacturers of certain categories of electronic products sold
in China after 1st March 2007 –
• Mark the product and packaging
• Define the Product’s Environment Protection Use Period (EPUP)
• Provide a Materials Content Declaration.
Product Labels
Product Product Label Meaning
Indicates toxic or hazardous substance contained in at least one
All GXS models
2020
of the homogeneous materials used for this part is above the
limit requirement in SJ/T11363-2006.
Environmental Protection Use Period is 20 years.
Packaging Information
Pallet Overshipper Protection Pieces Support Braces
This is the period in years during which the toxic or hazardous substances or elements contained in this product
will not leak or mutate under normal operating conditions so that the use of such electronic information
products will not result in any severe environmental pollution, any bodily injury or damage to any assets.
The Environmental Protection Use Period is 20 years for this product.
For the purposes of EPUP, normal operating conditions are considered to be use in accordance with the
product’s instruction manual.
Materials Content Declaration for GXS
Toxic or Hazardous Substances and Elements
Lead
(Pb)
Part name
Motor (mechanical
booster)
Motor (pump) O O O O O O
Pump & booster O O O O O O
Electronics and
Controls
Cooling system O O O O O O
Purge system O O O O O O
O: Indicates that this toxic or hazardous substance contained in all of the homogeneous materials for this
part is below the limit requirement in SJ/T11363-2006.
X: Indicates that this toxic or hazardous substance contained in at least one of the homogeneous materials
used for this part is above the limit requirement in SJ/T11363-2006.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 11
M588-00-880 Issue E
Associated publications
Publication titlePublication Number
Vacuum pump and vacuum systems - safety manualP400-40-100
Pumping flammable gases - applications noteP411-00-090
SIM protocol - instruction manualP411-00-200
MicroTIM - instruction manualD373-60-880
GXS 100 centres customer parts manualM588-40-845
GXS 150 centres customer parts manualM598-40-845
Trademark credits
Han® is a registered trademark of Harting Electric GmbH
EtherCon® is a registered trademark of Neutrik® AG
Fomblin® is a registered trademark of Solvay Solexis SpA
Krytox® is a registered trademark of DuPont (E.I. du Pont de Nemours and Company)
Loctite® is a registered trademark of Henkel Corporation
Natural Blue® is a registered trademark of Henkel Corporation
Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 13
M588-00-880 Issue E
CAUTION
WARNING
1Introduction
1.1Scope and definitions
This manual provides installation, operation and maintenance instructions for the Edwards GXS dry pumping systems.
The dry pumping system must be used as specified in this manual otherwis e the protection provided by the equipment
may be impaired.
Read this manual before installing and operating the dry pumping system. Important safe ty information is highlighted
as WARNING and CAUTION instructions; these instructions must be obeyed. The use of WARNINGS and CAUTIONS is
defined below.
- he
Warnings are given where failure to observe the instruction could result in injury or death to
people.
Cautions are given where failure to observe the instruction could result in damage to the equipment, associated
equipment and/or process.
Introduction
The units throughout this manual conform to the SI international system of units of measurement.
The following warning labels are on the pump:
Warning - Refer to accompanying documentation.
Warning - Risk of electric shock.Warning - Heavy object.
Warning - Use protective equipment.RF Earth (ground).
The following warnings only appear in this manual:
Warning - Risk of explosion.Warning - Pressurised.
Safety data sheets for chemicals supplied by Edwards can be obtained by contacting Edwards or on
www.edwardsvacuum.com.
1.2Applications
GXS dry pumping systems are suitable for a wide range of industrial applications. Edwards has a dedica ted team of
applications engineers who can help to determine the best dry pumping system for an application.
Warranties may be invalidated if the dry pumping system is used on an unsuitable application. If in doubt, contact
Edwards.
1.3Description
The GXS dry pumping systems range has been developed to meet the demanding requirements for process pumping
solutions in industrial applications. The range sets new standards for harsh process capability, reliability and
reduced cost of ownership in low footprint packages.
There are various different ways to control the dry pumping system and monitor status. The user can manually press
controls on the front panel and monitor LEDs on the front and rear of the dry pumping system. The Edwards Pump
Display Terminal (PDT) gives further functionality for set up and status monitoring. Alternatively the dry pumping
system can be controlled using a distributed control system by connecting to the parallel interface by the MCM
MicroTIM. There are also several serial interface options, including Ethernet connection.
A high flow purge / solvent flush kit is available as an option to clean the dry pumping system on ap plications where
large quantities of dust and sticky deposits are encountered. The cleaning process is run while the dry pumping
system is in Green Mode/Standby mode and is carried out without the need to remove the pump enclosure. A PDT is
required to initiate the cleaning process, it controls a set sequence called DP Clean.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 15
M588-00-880 Issue E
1.4Priority of control
The dry pumping system can be controlled by a number of modules: the front control panel (refer to Figure 1), a
Pump Display Terminal (PDT) or by the customer’s system through the MCM MicroTIM or one of the ser ial interf aces.
Only one of these can have control of the dry pumping system at any one time. That is, once one of these has control
of the dry pumping system, control requests from the others are denied. Control must be released by one module
before control can be taken by a different module.
There are LEDs to indicate control:
The LED on the front control panel illuminates when control is taken by the front panel, refer to Figure 1,
item 6.
The LED on the rear of the pump illuminates when control is taken by the MicroTIM, refer to Figure 3, item 9.
The local control LED on the PDT illuminates when control is taken by that particular PDT, refer to
Appendix A2.
The PDT display also indicates which system is in control.
1.5Active utility control / standby
Introduction
The Active Utility Control (Green Mode) function may reduce speed, power and purge gas consumption of the dry
pumping system while on standby. The dry pumping system can be put into Green Mode / standby mode using the
front control panel, the PDT or through the MCM MicroTIM. Refer to Section 4.3 for more information.
Degree of protectionHazardous electrical sub systemIP21D (IEC60529)
LubricationOil typePFPE Drynert 25/6 (recommended)
2.2Performance data
Pump
Unitsm
GXS 160160< 1 x 10
GXS 160/17501160< 1 x 10
GXS 250250< 1 x 10
GXS 250/26001900< 1 x 10
GXS450450< 1 x 10
GXS450/26002200< 1 x 10
GXS450/42003026< 1 x 10
GXS750740< 1 x 10
GXS750/26002300< 1 x 10
GXS750/42003450< 1 x 10
SealsPTFE and fluoroelastomer
Gas systemStainless steel, aluminium, brass, PTFE and
fluoroelastomer
®
25/6 (alternative)
®
1525 (alternative)
Maximum continuous inlet pressure
-2
-3
-2
-3
-2
-3
-3
-2
-3
-3
1000
1000
1000
1000
1000*
1000*
1000*
1000*
1000*
1000*
Table 3 - Performance data
T ypical peak pumping
speed
3
/hmbarmbar
Fomblin
Krytox
Characteristics
Ultimate (shaft seal
purge only)
*Speed may be limited.
2.3Loading data
Refer to installation drawings in Appendix A1 for centre of gravity positions for dry pumping systems. The loading
data in Table 4 is for dry pumping systems with optional levelling feet and castors. Refer to Figure 4 for foot
positions.
36 - 100psi gauge
Purge gas supply qualityISO 8573
Purge gas inlet connection1/4 inch tube fitting
Table 6 - Gas module types and flows
µm
Gas module
type
Light Duty
(All GXS
systems)
Medium Duty
(GXS160 &
GXS250
systems)
Medium Duty
(GXS450 &
GXS750
systems)
*
By default the dry pumping system is supplied with the additional gas ballast switched off. This additional
gas ballast can be enabled in software using the op tional PDT.
†
GXS dry pumping systems in a standard configuration must run with a seal purge. If the application requires
removal of seal purge, consult an Edwards application specialist.
*The minimum geometric wire gauge for Han® K 4/4 is 6mm2 and minimum AWG size is 8 AWG.
†The minimum geometric wire gauge for Han® 100A module is 10mm2 and minimum AWG size is 6 AWG.
Supply voltage 3-phaseeither 200 - 230 or 380 - 460 (see rating plate)V a.c.
Frequency50/60 Hz
Wiring configuration3 wire plus Earth (ground)
Branch circuit protection requirementCurrent rating, refer to Table 7Fuse class gG (IEC 60269), UL class T, class J or class RK5,
Bussmann type JJS or equivalent I
to 600 V
Voltage tolerance range+/- 10%
Installation categoryII (IEC 60664-1)
Input supply voltage unbalance Should not exceed 2% wh en assessed over any one mi nute
period
Short circuit current rating (when
installed with class T or class J fuses)
Second protective Earth (ground)
conductor
Maximum permitted overcurrent
protection for systems with the Han
4 mains connector
for 200 - 230 V systems60A
for 380 - 460 V systems35A
Typical earth leakage
for 200 - 230 V systems:
- For GXS750/2600 & GXS750/4200
- For all other GXS systems
for 380 - 460 V systems:
- For GXS750/2600 & GXS750/4200
- For all other GXS systems
*
If you use overcurrent protection above the ratings in Table 7 for systems with the Han® K 4/4, the
minimum cable sizes no longer apply and you must ensure that the pump cable size is appropriately rated
and in accordance with local legislation and electrical regulations. Ensure that cable size is compatible with
the mains connector, refer to Table 9.
†
Typical earth leakage values measured at steady-state conditions. Note that higher leakage currents may
occur:
i) Under transient conditions such as power on or pump acceleration.
ii) With abnormal supply configurations such as a missing or earthed phase or unbalanced supply voltages.
Contact Edwards for more information about configuration requirements for earth leakage reduction.
*
†
®
200kA
Must be fitted with cross-sectional area at least equal to
Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 25
Table 9 - Electrical connections
M588-00-880 Issue E
Technical data
Description
Mains connectionRefer to Table 7 for the mains connector fitted
Refer to installation section for wiring
diagram
PDT interfaceXLR type 5-way plug24 V d.c. 0.2 A
Pin 10 V
Pin 224 V
Pin 3Transmit data
Pin 4Receive data
Pin 5 Not used
System interfaceXLR type 5-way plug24 V d.c. 0.75 A
Pin 10 V
Pin 224 V
Pin 3Transmit data
Pin 4Receive data
Pin 5 Not used
transistor (open collector)
Inlet isolation valve position sense
Pin 7 - ‘Closed’, Pin 8 - ‘Open’
Power Supplies
Pin 12 - Accessory 24 V supply24 V d.c. 0.75 A
Pin 13 - Accessory 24 V su pply
Pin 5 - 0 V supply common
*
The system interface, the EMS interface and the accessory interface have a combined current rating
of 0.75 A.
†
This supply will be disconnected in the event of an emergency stop.
†
Mating connector description / external
supply rating
30 V a.c. 1 A, 60 V d.c., 0.5 A
Internal supply rating
24 V d.c. 0.2 A
*
Table 10 - Wire assembly according to VDE 0295
Wire size (mm²)Fine stranded wires VDE 0295 class 5
684 x 0.30
1080 x 0.40
16128 x 0.40
25200 x 0.40
35280 x 0.40
50400 x 0.40
Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 27
M588-00-880 Issue E
Table 11 - Water cooling system data (continued)
DescriptionRatingUnits
Minimum required pressure
differential across supply and return
Supply temperature range5 - 40
Water typeTreated or non-corrosive industrial
Maximum particle size0.2mm
Acidity7.0 to 10.5pH
Hardness<250ppm of CaCO3 (<250 mg of CaCO3 per
Total dissolved solids (TDS)<1500mg/l
Total suspended solids (TSS)<10mg/l
Specific conductivity2000μS/cm
Materials in contact with
cooling water
Water inlet connection3/8 inch BSP male (GXS160/250)
Water outlet connection3/8 inch BSP male (GXS160/250)
*
Maximum coolant temperatures may need to be reduced if Glycol or other coolants are used dependent on the
dilution and type.
Refer to Tables 12 to 16bar
*
Stainless steel, Nitrile, PTFE, brass
polyamide and fluoroelastomer
1/2 inch BSP male (GSXS450/750/
2600/4200)
1/2 inch BSP male (GSXS450/750/
2600/4200)
,
°C
2
litre)
Technical data
Table 12 - Water consumption data (GXS160/250/1750/2600)
All GXS dry pumping systems have a valved cooling system which will cause coolant flow rate to vary in
response to pump load conditions. Table 12 states the "minimum flow rate required" under worst case pump
load conditions, when all valves are open. Flow rates need t o be increased and/or coolant temperature s
reduced if Glycol or other coolants are used dependent on the dilution and type.
†The differential pressure values given are the mi nimum differential pressures required across the wa ter
supply / return at the point of connection to the pump to achieve the desired flow when the solenoid
valves are open.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Water Temperature (°C)
20 SLM
1.3 bar dP
20 SLM
1.3 bar dP
15 SLM
0.75 bar dP
15 SLM
0.75 bar dP
15 SLM
0.75 bar dP
15 SLM
0.75 bar dP
Page 29
2.7DP clean high flow purge / solvent flush option
Table 17 - High flow purge / solvent flush data
FeatureSpecificationRating
Pneumatic valve gas supplyNitrogen or clean dry air2.5 - 6.9 barg
(36 - 100 psig)
Pneumatic valve inlet connection3/8 inch compression fitting
High flow purge gasAir , nitrogen or other inert gas which
is compatible with process
High flow purge air filter½ inch NPT male
Available as a spare, refer to
Section 7.4
DP clean solvent flush fluid inlet
connection
DP clean solvent suction pipe
connection
3/8 inch BSP male
3/8 inch BSP female
Typically 170 slm (for GXS160 &
GXS250 systems) and 185 slm (for
GXS450 & GXS750 systems) at
atmospheric pressure at purge inlet
connection
M588-00-880 Issue E
Technical data
Notes: 1. The high flow purge /solvent flush kit is available as an option.
2. The DP clean solvent suction pipe is supplied with the pump but not fitted.
2.8External evacuation system
Pumpdown performance on dry pumping systems fitted with mechanical boosters can be further enhanced by the use
of an External Evacuation System (EES) kit. The EES kit will only provide a performance improvement on pumpdown
cycles lasting less than 30s to pressures below 0.1mbar. The EES kit must only be used on clean applications.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 31
M588-00-880 Issue E
WARNING
WARNING
WARNING
3Installation
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.
The dry pumping system should not be operated with the enclosure panels removed.
The dry pumping system contains electrolytic capacitors which may emit dangerous fumes under
certain fault conditions. Ensure the dry pumping system is installed in a well-ventilated area.
Potential hazards on the dry pumping system include electricity, hot surfaces, process chemicals, lubricating oil,
purge gas and water under pressure.
Installation
Detailed safety information is given in Section 4 and Edwards Safety Manual Publication Number P400-40-100 Vacuum
Pump and Vacuum Systems.
A suitably trained and supervised technician must install the dry pumping syst em. Users can be trained by
Edwards to conduct the tasks described in this manual, contact your local service centre or Edwards for more
information.
Do not remove the temporary cover or blanking plate from the dry pumping system inlet and exhaust until
ready to connect the dry pumping system to the vacuum or exhaust extraction system. Do not operate the
dry pumping system unless the inlet and exhaust are connected to the vacuum and exhaust extraction
system.
Vent and purge the process system (if the dry pumping system is to replace an existing pumping system)
for 15 minutes before starting installation work. Refer to Section 5.
Disconnect the other components in the process system from the electrical supply so that they cannot be
operated accidentally.
Electrical, purge gas and water supplies are all potentially hazardous energy sources. Before carrying out any
maintenance the supply of these sources should be locked and tagged out.
Any unintended overflows or spills of oil or water must be removed immediately to avoid risk of slips.
Obey all national and local rules and safety regulations when installing the dry pumping system. Consult
Edwards Safety Manual Publication Number P400-40-100 Vacuum Pump and Vacuum Systems before pumping
hazardous materials. This publication is available on request: contact your supplier or Edwards.
Route and secure cables, hoses and pipework during installation to avoid possible risk of trips.
Before locating the dry pumping system, ensure that the installation area is clean and free from debris and
contamination (such as oil).
In order for the dry pumping system to perform to specification, appropriate facilities must be provided as detailed
in this manual.
Suitable lifting equipment must be used to move the dry pumping system. It is too heavy to lift by
hand.
Move the dry pumping system to its operating position using any of the following methods:
Use a forklift or pallet truck to lift the dry pumping system.
Do not exceed the topple angle when moving the dry pumping system. When using a forklift or
pallet truck, adjust the forks to lift around the centre of gravity.
When using a forklift or pallet truck to lift the dry pumping system, be sure to insert the forks under the base
rail on the side of the dry pumping system otherwise the exhaust may be damaged. The base rail has cut-outs
for forklift access.
Refer to the installation drawings in Appendix A1 for topple angle and centre of gravity information.
Lift the dry pumping system by the eyebolts.
Ensure that the maximum angle between paired slings used to lift the dry pumping system is 45°.
Each dry pumping system is provided with four lifting eyebolts to enable lifting, Figure 2 item 4.
Ensure that all the lifting eyebolts are used when lifting the dry pumping system. Once the dry pumping system has
been moved to its location, remove the lifting eyebolts and replace with the lifting eyebolt covers supplied with the
dry pumping system.
3.1.1Dry pumping systems with optional castors
Dry pumping systems fitted with castors should only be wheeled short distances over flat surfaces.
If the floor surface is uneven or has obstacles the dry pumping system should be lifted with suitable
lifting equipment.
GXS dry pumping systems are supplied with an option of skids or castors. For dry pumpin g systems fitted with casto rs
it is important to note that the castors are intended only to aid manoeuvre of the dry pumping system into its final
operating position. Dry pumping systems should be moved near to their final operating positions using either a forklift
or pallet truck or lifted via the eyebolts as described above.
Note that the force required to push a dry pumping system on its castors varies greatly depending on the surface
finish and cleanliness of the floor and any slopes or inclines. The forces quoted in Section 2.1 were measured on a
flat and level concrete floor and are not necessarily representative of all industrial locations.
It is the user's responsibility to carry out a risk assessment of their own location and take appropriate measures to
ensure that the dry pumping system is manoeuvred safely and in accordance with local and national manual handling
guidelines.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 33
M588-00-880 Issue E
WARNING
3.1.2Levelling the pump
The GXS dry pumping system must be located on a firm, level surface to ensure that it works correctly and is not
damaged. The pump must be level to a maximum of 3 degrees in any direction, measured at the pump inlet. It can
be located directly on the floor or on a frame. Ensure that access is possible to the emergency stop button (refer to
Figure 1, item 1). Guidance for access areas (general and service) is given in the installation drawings.
Pumps with skids are provided with four floor mounting plates, Figure 2, item 2. If necessary, fit shims
(which must be supplied) to ensure that the dry pumping system is level.
Pumps with castors are provided with f our levellin g feet, Figure 3, item 21. Once the dry pumping system has
been pushed into position, adjust the levelling feet to make sure that the dry pump ing system is level a nd is
not supported by the castors. Refer to the installation drawings in Appendix A1 for suggested jacking height.
3.1.3Securing the pump
To secure the pump in place to prevent inadvertent movement (for example during an earthquake), take note of the
following:
Dry pumping systems with castors are supplied with 4 off seismic restraints as detailed in the installation
drawings.
Dry pumping systems with skids are provided with 4 off mounting holes in the floor mounting plates as
detailed in the installation drawings.
Installation
All dry pumping systems can be secured by fitting bolts o r studs (not supplied) th rough the mo unting holes in
either the mounting plates or seismic restraints. Use M16 (5/8 inch) bolts with shakeproof washers or other
suitable anchor bolts of the same size.
Ensure that bolt size and spacing is adequate for the loads anticipated and the strength of the floor or frame.
T o locate the pump directly on the floor, use a concrete foundation with a mass of at least 1.5 times the mass
of the pump. Ensure the length and width of the foundation extend at least 100 mm (4 inches) beyond the
dimensions of the pump.
If vibration transmission is a concern, vibration isolators (not supplied) should be fitted betwee n the
mounting plates or seismic restraints and the bolt or stud.
3.2Lubrication
The dry pumping systems are given a charge of oil before leaving the factory.
3.3Connect the dry pumping system to the vacuum / exhaust
system
Pipe the exhaust to a suitable treatment plant to prevent the discharge of dangerous gases or
vapours to the surrounding atmosphere.
Do not operate the dry pumping system with the exhaust pipeline blocked. If the exhaust pipeline
is blocked, the dry pumping system can generate exhaust pipeline pressures of up to 10 bar
(10 x 10
in the exhaust pipeline for less than 0.5 seconds if the inlet is instantaneously exposed to
atmospheric pressure when the pump is running and the exhaust is blocked.
Dry pumping systems have a maximum continuous exhaust line pressure limit. Operation above the limit may
damage the pumping mechanism.
GXS medium duty dry pumping systems have an exhaust pressure sensor which will initiate warnings and alarms
when the pump is operated for at least 20 seconds above the limits given in Table 24. The pump will continue
to run with a warning present, however an alarm will cause the pump to stop.
GXS light duty dry pumping systems do not have an exhaust pressure sensor. The maximum continuous exhaust
line pressure of these dry pumping systems should not exceed 0.4 barg.
For all pumps, it is the user's responsibility to provide an exhaust system with sufficient conductance to ensure
the exhaust pressure limit is not normally exceeded.
5
Pa). Note that a pressure spike up to a maximum 15 bar (15 x 105 Pa) can be generated
Use a catchpot to prevent the drainage of condensate back into the dry pumping system. Condensate that drains
back into the dry pumping system could damage the pump.
Do not reuse any O-ring or O-ring assembly and do not allow debris to get into the dry pumping system during
installation.
When connecting the dry pumping system to the vacuum system, take note of the following:
To get the best pumping speed, ensure that the pipeline which connects the vacuum system to the dry
pumping system is the minimum length possible and has an internal diameter not less than the system inlet
port.
Ensure that all components in the vacuum pipeline have a maximum pressure rat ing which is greater than the
highest pressure that can be generated in the dry pumping system.
Incorporate flexible pipelines in the vacuum pipeline to reduce the transmission of vibration and to prevent
loading of coupling joints. Edwards recommend using Edwards braided flexible pipelines. The pipelines
should be rated for 110 °C.
Adequately support vacuum/exhaust pipelines to prevent the transmission of stress to pipeline coupling
joints.
Incorporate a pressure gauge in the inlet pipeline to determine that the dry pumping system operates
correctly.
The dry pumping system inlet must be ab le to b e isolated from the atmosphere and from the vacuum system
if pumping or producing corrosive chemicals.
The outlet of the exhaust pipe can have a check valve fitted which prevents the suck-back of exhaust
vapours after the dry pumping system is shut down. The check valve also provides additional attenua tion of
the pulses in exhaust pressure.
For all GXS750 dry pumping systems there is a limit to the length of NW50 pipeline that can be used between
the pump exhaust connection and the facility exhaust. For GXS750 dry pumpi ng systems with a check valve,
the length of pipeline is limited to 1 metre. For GXS750 dry pumping systems without a check valve the
length is limited to 3 metres. If these lengths are exceeded, the GXS750 pump will trip out due to high
exhaust pressure. If the distance to the facility exhaust is greater than these limits, consider using an
adaptor on the pump exhaust and a larger diameter pipeline.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 35
M588-00-880 Issue E
Use Edwards half claw clamps:
For pumps running on dusty processes Edwards recommend that the exhaust line is clea ned regularly as part
of routine maintenance. Accumulation of dust in the exhaust line can reduce conductance and therefore
increase exhaust pressure which ma y damage the pump. The frequency of exhaust line cleaning depends on
the process. On very dusty applications, use a low-impedance inlet filter to reduce maintenance
requirements.
1. Referring to Figure 5, remove the temporary cover or blanking plate from the inlet of the dry pumping system.
Take care not to drop screws, tools and so forth into the pump inlet. Retain the nuts, bolts, washers and
blanking plate for future use. Retain the temporary cover for future use on non-contaminated pumps only. The
inlet O-ring is supplied with the pump, it is fitted underneath the inlet flange cover.
2. Use the O-ring supplied and suitable nuts, bolts and washers (not supplied) to connect the inlet flange
(Figure 2, item 5) to the vacuum system. The inlet flange is not designed for use with a trapped O-ring or
centering ring. Use Edwards half claw clamps when connecting an ISO style foreline flange to the dry pumping
system inlet. Refer to Figure 5.
3. Use the trapped O-ring and clamp supplied to connect the exhaust outlet (Figure 2, item 3 or Figure 3 item 20)
Ensure that the purge gas supply conforms to the requirements given in the technical data section. Failure to
do so may cause the gas pipelines to become blocked or the dry pumping system to be damaged.
Refer to Figure 3, item 18 for location of the purge gas connection. Nitrogen and clean dry air are suitable purge
gases for GXS dry pumping systems. To use a different purge gas, please contact Edwards.
Check visually that the rotameter is not damaged when installing the dry pumping system.
Note:Refer to Section 2.4 for purge gas supply requirements.
3.4.1Flammable / pyrophoric materials
Obey the instructions and take note of any precautions given below to ensure that pumped gases
do not enter their flammable ranges.
When flammable or pyrophoric materials are present within the pump there may be additional risks that the user is
responsible for assessing and managing as part of the entire process system installation. Th e severity of the risks and
the necessary control measures will depend largely on whether the process system exhaust is in the flammable
region, if this is part of normal operation, or if it might only occur under rare conditions. The additional risks arise
because all dry pumps must be considered a potential source of ignition due to the heat of compression, or possibly
friction. If ignition occurs then the following may happen:
High pressures could occur within the pump and may not be contained.
A flame front could travel back up the foreline.
A flame front could travel downstream from the exhaust of the pump.
Industry best practice suggests that the following measures will reduce the risks of pu mping flammable mi xtures and
pyrophoric materials, but it is the responsibility of the user to carry out a risk assessment and take appropriate
measures:
Do not allow air to enter the equipment.
Ensure that the dry pumping system is leak tight.
Ensure that gases in the pump do not enter the flammable range. This may be achieved by diluting gases in
the pump by supplying sufficient inert gas purge. For example, dilution with nitrogen to below one quarter
Lower Explosive Limit (LEL) or, if that is not practical, to below 60% Limiting Oxidant Concentration (LOC).
The gas module supplied with the pump is not intended to perform a safety function. Users may need to
consider adding appropriate measures to monitor the flow of purge gas, for example external sensors. Dry
pumping systems that are fitted with the light duty gas module must not be used on applications pumping
flammable or pyrophoric materials.
For further information please refer to Publication Number P400-40-100, Applications Note 'Pumping Flammable
Gases' P411-00-090 or contact Edwards.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 37
M588-00-880 Issue E
WARNING
3.4.2Gas purges
If inert gas purges to dilute dangerous gases to a safe level are to be used, ensure that the pump
is shut down if an inert gas supply fails.
Switch on the inert gas purge to remove air from the pump and the exhaust pipeline before the process starts. Switch
off the purge flow at the end of the process only after the remaining flammable gases or vapours have b een purged
from the exhaust pipeline.
If liquids that produce flammable vapours could be present in the pump foreline, then the inert gas purge to the dry
pumping system should be left on all the time this liquid is present. Flammable liquids could be present in the foreline
as a result of condensation or may be carried over from the process.
When calculating the flow rate of inert gas required for dilution, consider the maximum flow rate for the fla mmable
gases/vapours that could occur. For example, if a mass flow controller is being used to supply flammable gases to
the process, assume a flow rate for flammable gases that could arise if the mass flow controller is fully open.
Continually measure the inert gas flow rate; if the flow rate falls below that required, then the flow of flammable
gases or vapours to the pump must be stopped.
Installation
3.5Leak test the dry pumping system
Figure 6 - Interspool connections on pump/booster combination systems
IDPart identification
1¼ inch BSP inlet port (available on dry pumping systems with light duty gas module only)
23/8 inch BSP port
3Interspool
43/8 inch BSP port
Leak test the dry pumping system after installation and seal any leaks found to prevent leakage of
dangerous substances out of the dry pumping system and leakage of air into the dry pumping
system.
The pump and booster combination syst ems have an interspool which has several ports that can be used for leak
checking purposes. Remove the right hand side panel and refer to Figure 6.
Note:For further information on leak testing, contact the supplier or Edwards for advice.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 39
3.6Electrical supply
CAUTION
CAUTION
CAUTION
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
Ensure that the electrical installation of the dry pumping system conforms with all local and
national safety requirements. It must be connected to a suitably fused and protected electrical
supply and a suitable Earth (ground) point.
This equipment is suitable for Installation Category II as defined in IEC 60664-1. The dry pumping
system must be connected to an isolator that disconnects all current carrying conductors and can
be locked out in the off position (LOTO). The isolator must be in close proximit y to the equipmen t,
within easy reach of the operator and identified as the disconnect device for the equipment.
Isolate the electrical supply before disconnecting the electrical supply cable from the dry pumping
system.
M588-00-880 Issue E
Installation
Ensure that the dry pumping system and the electrical supply cable are suitably protected against
Earth (ground) faults and that the Earth (ground) conductor of the electrical supply cable is longer
than the phase conductors in the connector. A second protective Earth (ground) conductor (with
a cross-sectional area at least equal to phase conductor size up to 16 mm
protective Earth (ground) stud, Figure 3 item 15.
All connections to the interface control must be double insulated or have equivalent protection.
Do not connect voltages greater than 30 V a.c. or 60 V d.c. to the control/interface connections as
the interface control will not provide protection against electric shock.
The power wiring to the dry pumping system must be properly protected.
All dry pumping systems are supplied already configured for an electrical supply. The dry pumping system cannot
be reconfigured between the low voltage (200 V to 230 V) and high voltage (380 V to 460 V) ranges.
This is an industrial (Class A) product as defined by EN61326. To ensure compliance with European
Electromagnetic Compatibility (EMC) requirements for EMC emissions, please note that it is not intended for use
in domestic buildings, or in properties directly connected to an electrical supply network which also supplies
domestic buildings.
2
) must be fitted to the
Do not connect voltages greater than specified in Table 9 to the control/interface connections as it may cause
damage to the interface control.
To use the dry pumping system with a power supply in a different voltage range to that specified on the rating plate,
contact Edwards.
The dry pumping system is protected from motor overloads and short circuits by solid state electronics. The power
wiring between the dry pumping system and the electrical installation must be protected. When selecting input fuses,
refer to Section 2.5. Pump rating information can be found on the label on the rear of the pump.
To connect the electrical supply to the dry pumping system through an ELCB (or RCD depending on territory) it must
be suitable for protection of equipment with a d.c. component in the fault current, for short duration switch-on
surges and for high leakage current (for example, type B, according to EN50178).
The secondary protective Earth (ground) is required in case of failure of the primary earth and because pump filters
can cause high earth leakage currents, refer to Table 8.
3.6.1Mains supply cable connection
The Harting connector is not approved for connection and disconnection under load.
Three different types of electrical supply connector are used on GXS dry pumping systems. A kit of parts containing
the correct mating half connector is supplied with each dry pumping system. Refer to Section 2.5 for details of the
connector types and the dry pumping systems to which they are fitted. Information for wiring each of these different
connectors is given in Figures 7, 8 and 9.
Referring to either Figure 7, 8 or 9 for the appropriate electrical connector for the dry pumping system, use the
following instructions to make the electrical supply cable:
1. Refer to Section 2.5 for cable sizes and type to determine the most appropriate cable for the dry pumping
system.
Note:The kit of parts for dry pumping systems with the Harting Han® 100A and Han® 200A axial screw modules
may contain a choice of inserts suitable for different wire sizes as detailed in Table 9. Ensure that the
correct insert for the size of wire that is to be used is selected.
2. Screw the cable gland onto the hood.
Note:The connector kit for the Han® K 4/4 contains a choice of 5 different rubber inserts that are suitable for
cables with various outside diameters. Select the most suitable rubber insert for the size of cable that is
to be used.
3. Pass the cable through the cable gland and hood. Cab les mu st be bare-ended without ferrules to ensure correct
clamping in the connector block.
4. Before starting the assembly, use the hex (Allen) key specified in the appropriate figure to ensure that all the
axial cones of the connector insert(s) are screwed fully downward to completely open the contact chambers.
5. Carefully remove the cable insulation to the exact dimension specified in the appropriate figure. Do not twist
the cable strands.
6. Referring to the appropriate figure to identify the connections, insert each wire completely into the contact
chamber until the copper strands reach the bottom. Keep the cable in position while applying the recommended
tightening torque.
7. Fit the earth (ground) wire to the Protective Earth connection as shown in the appropriate figure.
Note:The Protective Earth connection on the Han® 100A and Han® 200A connectors is on the hinged frame. It
may be necessary to use one of the cable shoes (supplied) to fit the earth (ground) wire. Choose the most
appropriate shoe for the size of cable that is to be used.
8. Screw the connector insert into the hood (using the hinged frame for the Han® 100A and Han® 200A axial screw
Edwards and the Edwards logo are trademarks of Edwards Limited.
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M588-00-880 Issue E
9. If required, fit the coding pins to the connector block as shown in the appropriate figure.
Note:Harting (the manufacturer of the connector) states that after initial assembly, the recommended
tightening torque must only be reapplied once in order to avoid damage to the individual cable strands.
10.The dry pumping system has an electrical connector locking mechanism - there are two different types fitted
depending on pump variant.
For the locking mechanism for all GXS160, GXS250 and GXS450 dry pumping systems, refer to Figure 10.
This locking mechanism requires use of a suitable screwdriver to release. Referring to Figure 10, the dry pumping
system is supplied with a protective cover (item 5) fitted and the locking mechanism (item 1) may be applied. The
protective cover is held in place by two locking levers. Follow these instructions to fit the electrical supply cable:
Slacken off the locking screw (item 3) by a few turns to loosen the locking mechanism if necessary.
Move the locking mechanism (item 1) to the left as far as possible, then lift it up so that it rotates around the
pivot screw (item 2) and clears the left hand lever (item 4).
Push back both levers (item 4) to release the protective cover.
Remove the protective cover and fit the electrical supply cable.
Pull both levers back towards the user to lock the electrical supply cable connector in place.
Push the locking mechanism down as far as possible and then push to the right so that it prevents the left
hand lever from actuating.
Installation
Tighten the locking screw (item 3) to firmly hold the locking mechanism in place.
Connect the other end of the electrical supply cable to the electrical supply through a suitable isolator.
For the locking mechanism for all GXS750 dry pumping systems, refer to Figure 11.
This locking mechanism is held in place by two M5 locking nuts and requires use of a suitable spanner to release.
Referring to Figure 11, the dry pumping system is supplied with a protective cover (item 1) fitted and the locking
mechanism (item 3) may be applied. The protective cover is held in place by two locking levers (item 2). Follow these
instructions to fit the electrical supply cable:
Slacken off the two locking nuts (item 4) by a few turns to loosen the locking mechanism.
Move the locking mechanism (item 3) to the right as far as possible so that it clears the right hand lever
(item 2).
Push back both levers (item 2) to release the protective cover.
Remove the protective cover and fit your electrical supply cable.
Pull both levers back towards you to lock your electrical supply cable connector in place.
Push the locking mechanism as far as possible to the left so that it prevents the right hand lever from
actuating.
Tighten the locking nuts (item 4) to firmly hold the locking mechanism in place.
Connect the other end of the electrical supply cable to the electrical supply through a suitable isolator.
If further information is required about connecting the electrical supply, contact Edwards for advice.
A. Low volt pin configuration
B. High volt pin configuration
C. Mounting screw
D. Coding pin
E. Protective earth
F. Insert stranded wire
G. 2.5 mm hex (Allen) key
1. Pin 1 - Phase 1
2. Pin 2 - Phase 2
3. Pin 3 - Phase 3
4. Pin 4 - Not connected
Torque se ttings for connector pins
Cable size (mm
2
)
Max torque setting
(Nm)
62
103
164
Installation
Figure 7 - The Harting Han® K 4/4 cable-mounted connector
Edwards and the Edwards logo are trademarks of Edwards Limited.
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M588-00-880 Issue E
1. Electrical connector locking mechanism
2. Pivot screw
3. Locking screw
4. Lever (2 off)
5. Protective cover
1. Protective cover
2. Lever (2 off)
3. Electrical connector locking mechanism
4. Locking nuts
Figure 10 - Electrical connector locking mechanism for GXS160, GXS250 & GXS450 systems
Installation
Figure 11 - Electrical connector locking mechanism for GXS750 systems
3.7Connect an additional RF earth (ground) (optional)
If the dry pumping system will be operated in an area subject to high Radio Frequency (RF) emissions, in accordance
with good RF installation practice, Edwards recommend:
Use a star washer to connect the end of the Earth (ground) cable (Figure 2, item 6) connected to the dry
pumping system inlet to one of the bolts that are used to secure the inlet flange.
Connect an additional Earth (ground) cable to the RF Earth (ground) stud (Figure 3, item 19). A suitable low-
impedance cable must be used (for example, use braided cable).
Note:If not connecting to own control equipment, the external EMS link plug supplied to the EMS connection on
the rear of the dry pumping system (Figure 3, item 22) must be fitted. Failure to do so will result in not
being able to operate the dry pumping system.
If required, customer’s own control equipment can be connected to the dry pumping system to shut it down in an
emergency using the EMS connection (Figure 3, item 22). The emergency stop control must be compliant with IEC
60947-5-1. (This should be a red self latching mushroom push button on a yellow background).
3.9Connect and set up cooling water
Do not turn on the cooling water supply until after completion of the electrical installation of the
dry pumping system or condensation may form inside the enclosure and there may be a risk of
electric shock.
Remove both the outer dust caps and inner plastic plugs from the water inlet and outlet fittings before
connecting the cooling water hoses.
Do not apply excessive torque to the water fittings when connecting the water supply to the dry pumping system
as this may cause damage to the manifold. Use a suitable spanner to prevent the bulkhead fittings on the dry
pumping system from turning whilst tightening up the connectors.
Fit the inlet strainer (supplied) into the supply side of the cooling water system to prevent damage to the cooling
system within the dry pumping system.
Notes: 1. For optimum water cooling, ensure that the cooling water supply meets the specification given in
Section 2.6. Ensure water supplies are connected in parallel. Refer to Figure 3, items 17 and 13.
2. For minimum water consumption, regulate the cooling water flow to the dry pumping system.
The dry pumping system is supplied with blue plastic dust caps fitted over the outside of the water inlet and outlet
fittings and with red plastic plugs fitted inside these water fittings. Ensure that both sets of plastic plugs are removed
before connecting the cooling water hoses, refer to Figure 12. Retain the plastic plugs for future use.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 47
Figure 12 - Remove the plastic plugs from the water fittings
A. Remove outer (blue) caps and inner (red) plastic plugs
M588-00-880 Issue E
Installation
Fit the inlet strainer and then use the following procedure to connect the cooling water supply and ensure that the
dry pumping system is receiving the correct water flow rate. Before starting, ensure that the electrical power supply
to the dry pumping system is switched off:
1. Use BSP pipe fittings (not supplied) to fit to the cooling water supply and return hoses.
2. Connect the water return hose to the cooling water outlet (Figure 3, item 17). Fit a water flow meter into the
water supply line close to the pump and then connect the water supply hose to the cooling water inlet (Figure 3,
item 13)
3. Turn on the cooling water supply.
4. Switch on the electrical power to the dry pumping system. All the water valves in the pump cooling system will
automatically open for a period of around 10 seconds.
5. Adjust the water flow rate so that it meets the requirements given in Table 12. Note that the water valves will
all close again after 10 seconds and the flow rate displayed by the water flow meter will decrease - this is
normal. If necessary, cycle the power to the pump to re-open the valves for a further 10 seconds to continue
setting the water flow rate.
6. Once the water flow rate has been set the water flow meter may be removed.
7. Inspect the water hoses, pipelines and connections and check that there are no leaks.
Turn off the water supply while completing the remainder of the installation procedures.
. Take care not to turn the bulkhead fittings on the pump when tightening up the connectors.
When fitting accessories inside the GXS enclosure, ensure that the pump is switched off and lock
and tag out the electrical supply before removing the enclosure panels.
The surfaces of the dry pump, booster and spools are very hot when the GXS dry pumping system
is running. Allow these surfaces to cool to safe temperatures before installing accessories inside
the GXS enclosure. Be sure to route and secure accessory cables as shown in their individual
installation manuals to prevent cables from resting on hot surfaces.
The power to the dry pumping system must be switched off when the MCM MicroTIM or active accessory module
is installed or removed. If it is not, these modules may be damaged. Refer to the appropriate accessory manual
for more information.
Refer to the individual accessories manuals for information about installation.
Refer to Appendix A2.14 for instructions on how to set up the MCM MicroTIM using the PDT.
3.11Commission the dry pumping system
During some application cycles it is possible that the dry pumping system may exceed OSHA
1910.95 Occupational Noise Exposure Limits, the EU noise directive 2003/10/EC or other regio nal
noise limits dependent upon the process, duty cycle, installation or environment in which the dry
pumping system is being operated. A sound pressure survey must be conducted after installation
and, if necessary, controls implemented to ensure that the relevant limits are not exceeded during
operation and that adequate precautions are taken to prevent personnel from exposure to high
noise levels during operation.
1. Switch on the external electrical supply and check that the power LEDs (Figure 1, item 7 and Figure 3, item 4) go
on. If the LEDs do not go on, contact Edwards.
2. Switch on the cooling water and purge gas supplies.
3. Ensure that the exhaust extraction system is not blocked (for example, that valves in the exhaust extraction
system are open).
4. Ensure that all openings to atmospheric pressure in the foreline vacuum system are closed.
5. Press and hold the local control button (Figure 1, item 5) and check that the green local control LED
(Figure 1, item 6) comes on and then remains continuously illuminated.
6. Press START button (Figure 1, item 3).
7. If the dry pumping system starts and continues to operate, continue at Step 8. If a warning or alarm condition is
indicated:
Shut down the dry pumping syst em: refer to Section 4.4.
Contact Edwards.
Edwards and the Edwards logo are trademarks of Edwards Limited.
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M588-00-880 Issue E
WARNING
WARNING
8. Look at the pressure gauge in the inlet pipeline:
If the pressure is increasing, immediately shut down the dry pumping system and contact Edwards.
If the pressure is decreasing continue at Step 9.
9. Visually check the purge gas rotameter on the rear of the pump to ensure purge gas is being delivered to the
pump. Continue to check the rotameter on a regular basis as the dry pumping system is used.
10.After the dry pumping system is commissioned:
To continue to operate the dry pumping system, refer to Section 4.1.
Otherwise, shut down the dry pumping system, refer to Section 4.4.
3.12Install additional safety equipment
If the control system needs to know the total flow rate of purge gas to the dry pumping system for
safety reasons, install suitable measurement equipment in the purge gas supply pipeline.
Installation
If the gas purges are used to dilute dangerous gases to a safe level, ensure that the dry pumping
system shuts down if the purge gas supply to the dry p umping system fails.
If the total flow rate of purge gas to the dry pumping system is required to be known for safety reasons, suitable
measurement equipment should be fitted in the purge gas supply pipeline. If fitting a rotameter, ensure that it is
suitable for use with the purge gas and that it is correctly calibrated. The rotameter supplied with the pump is not
intended to perform a safety function, it is not calibrated and must be used for indication only.
Ensure that the installation is configured so that it remains safe if there is a failure of the purge gas supply to the
dry pumping system.
If an alarm condition is detected the dry pumping system will shut down automatically. Ensure that the installation
remains safe if the dry pumping system shuts down automat ically.
3.13Purge gas set up
There are two types of gas module used on GXS dry pumping systems, refer to Section 2.4. The gas module
configuration may be adjusted to suit p rocess demands. Contact Edwards service personnel for instruction on how to
access the gas valves menu (by the PDT) and for process-specific recommendations.
For dry pumping systems using the medium duty gas module, there is an adjustable needle valve fitted to the purge
pipe which enables the adjustment of the level of gas ballast to suit the application.
Use the following procedure to adjust the gas ballast:
1. Remove the left hand side panel of the dry p umping system.
2. Identify the adjustable needle valve on the purge pipe (contact Edwards for guidance).
3. Adjust the needle valve until the required flow is met. Note that the rotameter on the rear of the pump
measures total purge gas flow to the dry pumping system, including shaft seal and exhaust purge as well as gas
ballast. The total purge flow is indicated by the position of the centre of the ball in the rotameter. Refer to
For GXS450 and GXS750 dry pumping system s with the me dium duty gas module there is an additional electronical lycontrolled gas ballast available for harsh applications. By default, these dry pumping systems are supplied with this
additional gas ballast switched off but it can be enabled using the PDT.
Use the following procedure to enable the additional gas ballast:
1. Press the SETUP button on the PDT to enter the SETUP menu.
2. Scroll using the UP/DOWN keys and select the FIT ACCESSORY menu.
3. An access code is needed to enter the FIT ACCESSORY menu - enter 538 when prompted.
4. From the FIT ACCESSORY menu, scroll down to GAS BALLAST and then select ENTER.
5. Scroll down to 'Fitted' and press ENTER to select.
6. The additional gas ballast is now enabled.
3.14High flow purge and solvent flush set up
By default the DP clean high flow purge and solvent flush assembly draws atmospheric air into the
GXS dry pumping system. If air is not compatible with the user’s process then nitrogen or another
inert gas may be used. It is the responsibility of the user to assess whether the DP clean purge gas
is compatible with the process.
Edwards only recommends use of water and diluted Loctite® 7840 or Loctite® Natural Blue®
when performing a solvent flush procedure. It is the responsibility of the user to assess whether
Loctite
Loctite® MSDS and technical data sheet. In particular the manufacturer states that Loctite® 7840
and Loctite
systems and should not be selected as a sealant for chlorine or other strong oxidizing materials.
For queries about solvent compatibility, contact Edwards applications speciali sts.
Hot steam and liquid will exit the pump during the solvent flush procedure. Ensure that the
exhaust is piped away safely and that any solvents are disposed of in accordance with local and
national safety and environmental requirements.
If an inert gas is used in place of atmospheric air for the DP clean purge gas, ensure it is regulated to atmospheric
pressure otherwise the DP clean process may not work properly and may cause damage to the pump.
The high flow purge and solvent flush procedures are performed by a single assembly wh ich is sup plied as an option
fitted in the factory. The actuating valve is operated pneumatically. Ensure the pneumatic gas supply meets the
specification given in Section 2.7.
Use a 3/8 inch compression fitting (not supplied) to connect the pneumatic supply to the dry pumping system. For
pump and booster combinations, the pneumatic inlet connection is on the rear pump panel, refer to Figure 3 item 10.
For pump-only systems, refer to Figure 13, item 4.
®
7840/Natural Blue® is compatible with the application - for more information refer to the
®
Natural Blue® are not recommended for use in pure oxygen and/or oxygen rich
The pneumatic regulator is pre-set to 50 ± 5 psig in the factory and does not need to be adjusted. The pneumatic
regulator is shown in Figure 13, item 5 for pump-only systems. For pump and booster combination systems, the
regulator is contained within the pump enclosure.
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M588-00-880 Issue E
1. Air filter
2. DP clean solvent flush fluid connection
3. Inlet spool
4. Pneumatic valve inlet connection
5. Pneumatic regulator
6. Optional connection to pneumatic valve sensor
7. Pneumatic valve
8. Pneumatic valve electrical connection
To use an inert gas in place of atmospheric air as the DP clean purge gas, first remove the air filter and in its place
connect up the inert gas supply. For pump and booster combinations, the air filter is on the rear pump panel, refer
to Figure 3, item 12. For pump-only systems, refer to Figure 13, item 1. Refer to Section 2.7 for information about
fittings and typical purge gas flows.
A solvent suction pipe is provided with the pump. When only performing a high flow purge procedure the solvent
suction pipe will not be needed. When performing a solvent flush, fit the solvent suction pipe only when ready to
perform the DP clean procedure. For pump and booster combinations, the solvent flush fluid connection is on the
rear pump panel, refer to Figure 3 item 11. For pump-only systems, refer to Figure 13, item 2.
A PDT is required to operate the DP clean high flow purge and solvent flush.
Figure 13 - DP clean assembly for pump only systems
3.15Connecting the GXS dry pumping system for serial
communications
3.15.1Serial port connection
GXS dry pumping systems have two 5-way XLR sockets that can be used to connect the pump for serial
communications. The user can connect by the PDT connector on th e front of the pump, Figure 1 item 11 and by the
system interface on the rear of the pump, Figure 3 item 5.
An adaptor cable, Edwards part number D373-70-754, is available as an accessory. The cable is 2 m long with
a 5-way XLR plug on one end and a 9-way D connector socket on the other, allowing connection from the GXS dry
pumping system to a standard COM port on a computer. Should the user prefer to make their own adaptor cable,
refer to Table 9 for the pin-out of the XLR connectors.
Note:Some personal computers no longer come equipped with a standard 9 way D connector COM port. In this
case a USB to RS232 adaptor can be obtained.
For information about using SIM protocol with a serial port, refer to Appendix A2.13.
3.15.2Ethernet connection
Connect the Ethernet cable to the pump by the Ethernet connection on the rear of the pump, refer to Figure 3 item 3.
Refer to Appendix A2.12 for information on how to set up and use the Ethernet port.
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Page 53
4Operation
CAUTION
CAUTION
WARNING
WARNING
WARNING
WARNING
Do not operate the dry pumping system with the lifting eyebolts still fitted or with any enclosure
panels removed or damaged and do not touch any parts of the pump(s) when the dry pumping
system is on. Surfaces of the pump(s) are very hot and can cause injury to people.
Do not operate the dry pumping system with any enclosures removed or damaged as there may be
a risk of an electric shock.
4.1Start up
Ensure that it is safe to start the dry pumping system. Failure to do so (and, for example,
maintenance is being performed on components downstream of the dry pumping system), could
cause injury to people.
M588-00-880 Issue E
Operation
After the power is applied, all mains circuits will be energised.
The dry pumping system is designed to ride through transient power interruptions and to automatically restart
once the power is restored.
Do not operate the pump if the pipeline is restricted or blocked as the pump will not operate correctly and may
be damaged.
1. Switch on the cooling water and purge gas supply.
2. Switch on the electrical supply.
3. Check that the exhaust extraction system is not restricted and that any valves in the exhaust extraction system
are open.
The pump can be started using either the MCM MicroTIM, the PDT, or the front panel control or by commands sent
using the serial interfaces. Refer to Section 1.4 for information about taking control of the dry pumping system.
If the dry pumping system is to be operated by the user’s own control equipment by the MCM MicroTIM, ensu re th at
no other devices have control of the dry pumping system. If another device does ha ve control it must first be released
before the pump can be started by the MCM MicroTIM.
Use the control equipment to set the pump start/stop signal to the interface connector and check that the
running LEDs are illuminated.
The MCM MicroTIM takes control. The message ‘MTIM IN CONTROL ’ will be displayed on the PDT if connected.
The green Tool Control LED (Figure 3, item 9) on the rear panel will illuminate.
4.1.2PDT operation
If the dry pumping system is to be operated using the PDT:
Connect the PDT to the required PDT connection, front (Figure 1, item 11) or rear (Figure 3, item 5).
Control must be taken with the PDT - press Control button. The message ‘PDT1 IN CONTROL’ will be
displayed if the front connection is used and the message 'PDT2 IN CONT ROL' will be displayed if the rear
connection is used.
Press START button (refer to Appendix A2 for more information).
Press ENTER.
The dry pumping system will start and the Running LED on the pump and the Pump On LED on the PDT will
flash whilst the pump is coming on and warming up. These LEDs will stop flashing and remain illuminated
continuously once the pump is on-process.
4.1.3Front panel control operation
To operate the dry pumping system using the front panel controls (refer to Figure 1):
Press and hold the local control button (Figure 1, item 5). The green local control LED (Figure 1, item 6) will
illuminate continuously when control is taken. The message ‘Keys in Control’ will be displayed on the PDT if
connected.
Press and hold the start button (Figure 1, item 3) until the pump starts. The running LED (Figure 1, item 2)
and Green Mode LED (Figure 1, item 10) will both flash whilst the pump is coming on and warming up. Once
the pump has warmed up and is ready for process, the running LED will remain illuminated continuously and
the Green Mode LED will go off.
4.1.4Start, warm-up and on-process sequences
GXS dry pumping systems are shipped with a number of pre-programmed sequences. Many of the parameters are
configurable. Parameters can be configured using a PDT, refer to Appendix A2. The PDT is available as an accessory,
refer to Section 7.3.
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M588-00-880 Issue E
Table 18 - Start, warm-up and on-process sequences
SequenceDescription
Start pumpShaft Seal Purge (SSP) valve opened.
Pump runs.
Warm-upPump runs at 110 Hz until it reaches working temperature and then goes on-process
[default auto on-process].
On-processInlet isolation valve opened (if fitted).
Pump speed from standby (Green Mode) to full speed may be ramped by
configurable increments instead of going straight to full speed.
Pump will not go on-process if there are active warnings.
Pump may be configured to ignore warnings and go straight onto process.
Gas ballast is opened (if fitted, medium duty pumps only).
4.2Status indicators
The GXS dry pumping system has a number of LEDs that indica te pump status. The status LEDs are found on the front
panel controls, refer to Figure 1 and also on the rear panel, refer to Figure 3.
It is not possible to fully determine pump status by referring to only one status LED. By looking at both the runnin g
LED and Green Mode/Standby LED together the user can work out pump status. Refer to Table 20.
Table 20 - Pump status
Pump running LEDGreen Mode/Standby LEDPump status
OffOffPump stopped
FlashingFlashingPump is warming up
FlashingIlluminated continuouslyPump is in Green Mode/Standby
mode
Illuminated continuouslyOffPump is on-process
FlashingOffPump is shutting down
4.3Green Mode/Standby mode
Green Mode is used to reduce the power and purge gas consumption of the pump when off process. All GXS dry
pumping systems can support up to 9 different Green Mode configurations but, by default, only one Green Mode is
enabled. To enable alternative Green Mode configurations please contact your local Edwards service representative.
To enable GREEN MODE/Standby mode when the pump is running and warmed up, press and hold the start button
(Figure 1, item 3) for 5 seconds. The pump GREEN MODE LED (Figure 1, item 10) will illuminate continuously. The
pump Running LED(Figure 1, item 2) will flash.
To disable GREEN MODE/Standby mode, and therefore enable on-process mode, press and hold the start button
(Figure 1, item 3) for 5 seconds. If the pump has warmed up, the pump GREEN MODE LED (Figure 1, item 10) will go
out and the pump Running LED (Figure 1, item 2) will illuminate continuously. If the pump has not warmed up, both
the GREEN MODE LED and the pump running LED will flash until the pump is fully warm. The GREEN MODE LED will
then go out and the running LED will illuminate continuously to indicate that the pump is now on-process.
Table 21 - Green Mode/Standby sequence
SequenceDescription
GREEN MODE/StandbyInlet isolation valve closed (if fitted).
Pump runs at standby (GREEN MODE) speed.
Gas ballast valve closed (medium duty pumps only).
If pump temperature drops below working temperature then it will start to warm up
again.
Pump ready line will be off if pump is not warmed up.
The GXS dry pumping system can also be set into GREEN MODE/Standby mode using the following methods:
PDT, by the commands menu, refer to Appendix A2.4.4.
MCM MicroTIM, refer to the MicroTIM manual D373-60-880.
By commands sent over the serial interface using the SIM protocol, refer to the SIM Manual P411-00-200, or
Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 57
M588-00-880 Issue E
CAUTION
CAUTION
WARNING
WARNING
4.4Manual shut down
If the dry pumping system is shut down and not isolated from the electrical supply, do not
disconnect the Pump Display Terminal or release control from the Pum p Display Terminal or front
panel. This may result in the dry pumping system being started by another Module.
Do not remove the inlet connections until the pump has been allowed to stop rotating and the
power has been isolated. The pump can take up to three minutes to completely stop.
If the pump is stopped without the gas purge cycle on processes that have condensable or solid by-products then
the pump may not restart.
For applications pumping liquids or condensable gases: if the pump is switched off straight after process then
liquids may remain trapped in the pump. These liquids can corrode the pump mechanism whilst the dry pumping
system is switched off for extended periods and may prevent the pump from starting again. For these
applications Edwards recommend carrying out a Smart Stop with Stop Time set to the maximum 3600 seconds.
Once the pump has stopped, seal the inlet and exhaust to prevent migration of liquid/condensable back into the
pump mechanism.
Operation
The GXS dry pumping system has two manual shut down modes: Fast and Auto.
In Fast shut down mode, no gas purges are introduced and the pump stops quickly. This method of shut down is not
recommended.
In Auto shut down mode, a purge gas cycle is introduced and the pump shuts down gradually over a time period. This
is the recommended shut down mode and is the default mode on the dry pumping system.
Smart Stop is an additional sequence that allows the user to define the time period for the gra dual shut down and to
configure a setpoint temperature. If Smart Stop is enabled, the pump will perform a Smart Stop when the user selects
Auto shut down.
Refer to Table 22 for stop sequences.
Table 22 - Stop sequences
SequenceDescription
Stop with inlet purgeInlet purge gas valve opened (medium duty pumps only).
Inlet isolation valve closed (if fitted).
Pump runs for 15 minutes before stopping.
All gas purge valves closed before pump stops.
Smart StopInlet purge gas valve opened (medium duty pumps only).
Inlet isolation valve closed (if fitted).
Pump speed is ramped down over configurable shut down time.
All purge gas valves closed before pump stops.
Pump stops after configurable shut down time or after a con figurable time period
after the pump temperature is below a configurable setpoint.
The pump can be shut down using either the MCM MicroTIM, the PDT or the front panel controls. Note that only the
item in control can stop the pump (refer to Section 1.4).
Note:The EMS button will alwa ys stop the pump. It does not matter which item has co ntrol. Refer to Section 4.7.
If the pump is not going to be required for some time, switch off the electrical supply and the cooling water supply.
Seal the pump inlet and exhaust to prevent any moisture in the atmosphere from corroding the pumping me chanism.
4.4.1MicroTIM operation
Use the control equipment to reset the pump start/stop signal to the interface connector. The Running LEDs will then
go off and the pump running status output signal will open. An Auto shut down cycle is always performed when the
pump is stopped using the MCM MicroTIM.
4.4.2PDT operation
Press the stop button on the PDT (refer to Appendix A2 for more information). Choose whether to select Auto
or Fast shut down mode.
4.4.3Front panel control operation
Press and hold the stop button (Figure 1, item 4) for 5 seconds to stop the pump in Auto shut down mode
(recommended). Repeat within 10 seconds to stop the pump in Fast shut down mode. The running LED (Figure 1,
item 2) flashes whilst the pump is slowing down and will then turn off when the pump has shut down.
4.5Automatic shut down
Normally, if an alarm condition exists, the control system will shut down the dry pumping system. When the dry
pumping system shuts down, all the purge gas valves close and the pump stops. For dry pumping systems containing
a dry pump and booster combination, some a larms wi ll cause only the booster to stop, and not the full dry pumping
system.
Table 23 - Alarm actions
Alarm descriptionAlarm stops dry pump
EMS or system configuration faultYesYes
Exhaust pressure
Booster stator temperature
Dry pump stator temperatureYesYes
Booster status
Dry pump statusYesYes
*
Not applicable to systems with light duty gas module.
†
Not applicable to systems which do not contain a booster.
GXS160 and GXS160/1750150 °C160 °C
GXS250 and GXS250/2600150 °C165 °C
All GXS450 dry pumping
systems
All GXS750 dry pumping
systems
MB Stator temperature120 °C130 °C
*
Not available on dry pumping systems with the light duty gas module.
*
0.3 barg (4.4 psig)0.4 barg (5.8 psig)
170 °C180 °C
180 °C190 °C
Operation
Refer to Section 4.5 for information about alarms and automatic shut down conditions.
If the dry pumping system has an unplanned shut down, ensure that the cause of the shut down is identified and
rectified before restarting. If in doubt, contact Edwards.
Note: The high temperature alarms on Edwards dry pumping systems are dry pumping system protection trips and
should be considered as an abnormal running condition. If a dry pumping system has tripped due to any high
temperature alarm it should be investigated and the reason for the alarm established. Once the fault has
been remedied the dry pumping system should be left for a minimum of 30 minutes before attempting to
restart.
4.7Emergency stop
Note:The emergency stop switch is not a n electrical isolator.
To shut down the dry pumping system in an emergency, press the emergency stop switch (Figure 1, item 1).
Alternatively, the emergency stop controls can be operated in the user’s own control system if the emergency stop
circuit has been connected to the dry pumping system as described i n Section 3.8.
When emergency stop is selected:
The dry pump and the booster pump are switched off.
The solenoid valve(s) in the gas module close, to switch off the supply of purge gas to the pump.
The solenoid valve(s) in the temperature control manifold(s) de-energise with loss of temperature control.
The PDT will display ‘ALARM 1.01/STOP ACTIVATED’ (if connected) or it may display ‘ALARM 186.01/ DP INV
0040 0000 / EMS’.
The running LED will go off.
The alarm LED illuminates.
4.8Restart the pump after an emergency stop or automatic shut
down
Note:If the dry pumping system has automatically shut down because of high pump power, check that the pump
is free to rotate before restarting the dry pumping system: contact Edwards.
If the emergency stop switch on the front panel has been used to shut down the dry pumping system, the emergency
stop switch must be reset before the dry pumping system ca n be restarted. Turn the emergency stop switch to reset
it, then restart the dry pumping system as described in Section 4.1.
If the dry pumping system has been automatically shut dow n because of an alarm condition, the alarm condition must
be rectified before the dry pumping system can be restarted. If the alarm was caused by high pump temperatures,
refer to Section 4.6. Restart the dry pumping system as described in Section 4.1.
4.9Dry pump clean
The high flow purge and solvent flush kit is available as a factory-fit option to clean the pump mechanism on
applications where large quantities of dust and sticky deposits are encountered. The cleaning process is run while
the pump is in Green Mode/Standby mo de and is carried out without the need to remove the pump enclosure. A PDT
is required to initiate the DP clean process. Refer to Table 25 for details.
Table 25 - DP clean sequence
SequenceDescription
Dry pump clean
The DP clean high flow purge and solvent flush procedures can be run as often as required.
Only operates when the pump is running in Green Mode/Standby mode.
Purge gas or solvent fluid is admitted into the pump for a configurable time period
(default 20 minutes).
Pump speed during dry pump clean is configurable (default 80 Hz).
Gas purges may be configured to be on during the clean cycle and/or for a period
after the DP clean valve has closed (default off).
Pump is not able to go on-process until cycle has completed.
If dry pump clean is stopped by the user then the purge cycle is completed.
DP clean may be configured to start automatically when the pump goes off process.
4.9.1High flow purge
Use the following procedure to prepare for the high flow purge:
1. Set up the GXS dry pumping system ready for the high flow purge procedure as described in Section 3.14.
2. Put the pump into Green Mode/Standby mode (refer to Section 4.3).
3. Using the PDT, press the Setup button to enter the setup menu and then select the Command menu. An access
code is needed to enter the Command menu - enter 202 when prompted.
4. Scroll down to the DP clean menu and then press ENTER to select.
5. Select ‘DP clean on’ to start the high flow purge procedure.
The DP clean sequence will run automatically without requiring any operator intervention. Once the DP clean time
has elapsed, the dry pumping system will return back to Green Mode/Standby mode settings. The pump can then be
put back on-process.
To stop the high flow purge process whilst it is running, enter the DP clean menu again using the PDT and select ‘DP
Clean off’.
The DP clean procedure can be configured to suit the user’s application, refer to Appendix A2.9.
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Page 61
4.9.2Solvent flush
WARNING
WARNING
WARNING
Use of suitable protective gloves and eye protection is recommended when carrying out the
solvent flush procedure. Personal protective equipment should be checked and used as specified
by its supplier. Refer to the Loctite
Take care when handling solvents and water. Any overflows or spills should be cleaned up to avoid
risk of slips.
Hot steam and liquid will exit the pump during the solvent flush procedure. Ensure that the
exhaust is piped away safely and that any solvents are disposed of in accordance with local and
national safety and environmental requirements.
M588-00-880 Issue E
®
7840 or Loctite® Natural Blue® MSDS for more information.
Operation
Use the following procedure to perform the solvent flush procedure:
1. Set up the GXS dry pumping system ready for the solvent flush procedure as described in Section 3.14 and take
note of the safety warnings regarding process compatibility.
2. Fit the solvent suction pipe supplied. For pump and booster combinatio n systems, the solvent flush fluid
connection is on the rear panel, refer to Figure 3, item 11. For pump-only systems, refer to Figure 13, item 2.
®
3. Make up 5 litres of solvent solution using 1 litre of Loctite
Keep this ready in a suitable container.
4. Measure out another 2.5 litres of water into a separate container.
5. Put the pump into Green Mode/Standby mode (refer to Section 4.3).
6. Put the free end of the solvent suction pipe right down to the bottom of the container holding the 5 litres of
solvent solution.
7. Using the PDT, press the Setup button to enter the setup menu and then select the Command menu. An access
code is needed to enter the Command menu - enter 202 when prompted.
8. Scroll down to the DP Clean menu and then press ENTER to select.
9. Select ‘DP Clean On’ to start the solvent flush procedure. The solvent solution will then gradually be drawn into
the pump.
10.Depending on pump size it typically takes around 4-7 minutes to draw through the 5 litres of solvent solution
(larger pumps draw the liquid through more quickly than smaller pumps). Once the full 5 litres of solvent
solution have been drawn throug h, pu t t he f ree end of the sol ven t su cti on pip e ri g ht d own to the bo tt om of th e
container holding the 2.5 litres of water. The water will flush through any solvent solution remaining in the
pump mechanism.
7840 or Loctite® Natural Blue® with 4 litres of water .
11.The pump typically takes another 2 - 4 minutes to draw through the water. Once all the water has been drawn
into the pump, the DP clean process continues with a purge cycle, drawing air or purge gas into the pump to dr y
out the mechanism for the rest of the clean time.
Notes: 1. If monitoring the state of the solvent that exits the pump to determine whether the pump is clean take
special care because solvent solution initially exits the pump as steam and then as hot liquid with typical
temperature of 75 °C.
2. The exhausted liquid will never run clear. Exhau sted liquid fro m a ‘cl ean ’ p ump has a sim ilar visco sity
to water (not thick and viscous) and is a light rust colour when seen exiting the exhaust.
3. Depending on the application, the solvent flush process may need to be repeated, contact Edwards for
advice.
4. If the pump takes an abnormally long time to draw in fluids, there may be a problem with the high flow
purge and solvent flush kit. A blocked o rifice o r leaks in t he solvent suction pipe or pneumatic gas line
are the most likely causes. Investigate the problem and rectify before continuing to use the solvent flush
procedure. If in doubt, contact Edwards.
Once the DP clean time has elapsed, the dry pumping system will return back to Green Mode/Standby mode settings.
The pump can then be put back on-process.
To stop the solvent flush process whilst it is running, enter the DP Clean menu again using the PDT and select ‘DP
Clean off’. The pneumatic valve will shut, stopping the flow of solvent into the pump. If DP Clean has been configured
to run an inlet purge cycle after the clean cycle, sending a ‘DP Clean off’ command will initiate the purge cycle. To
stop the purge cycle as well, the PDT must be used to select 'DP Clean off' for a second time.
The DP clean procedure can be configured to suit the user’s application, refer to Appendix A2.9.
4.10Pump speed control and PID
For some applications it is important to be able to adjust the speed of the pump whilst it is on-process, either to a
set speed or to control the speed continuously to maintain a process pressure. The GXS dry pumping system has
capability to run both the dry pump and booster at various speeds whilst on-process and it is possible to configure
these speeds by a number of different methods. Refer to Appendix A2.10 for more information about how to set up
speed control options.
The GXS dry pumping system has a built-in Proportional-Integral-Derivative (PID) controller. When the PID function
is enabled and the pump is on-process, the PID controller continually adjusts the speed of the pump so that a userdetermined pressure is maintained at the chosen pressure sensor.
For more information about enabling and setting up the PID controller, refer to Appendix A2.11.
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Page 63
5Maintenance
WARNING
WARNING
WARNING
WARNING
WARNING
Only personnel specially trained to perform electrical maintenance should attempt
troubleshooting inside electrical enclosures. These enclosures contain hazardous voltages and are
not operator areas.
Leak test the dry pumping system after maintenance and seal any leaks found to prevent leakage
of dangerous substances out of and leakage of air into the dry pumping system.
5.1Safety and maintenance frequency
Obey the safety instructions given below and take the appropriate precautions. Failure to do so
can cause injury to people and damage to equipment.
M588-00-880 Issue E
Maintenance
Electrical, purge gas and water supplies are all potentially hazardous energy sources. Before
carrying out any maintenance the supply of these sources should be locked and tagged out.
Personal protective equipment should be checked and used as specified by its supplier. Hazardous
chemicals that have been pumped are located within the pumps and piping. Use of suitable
protective gloves and clothing along with a respirator is recommended if contact with substances
is anticipated. Particular caution should be exercised when working with fluorinated materials
which may have been exposed to temperatures greater than 260 °C. Refer to Edwards Safety Data
Sheets for detailed information.
Ensure that the maintenance technician is familiar with the safety procedures which relate to the products
pumped.
Allow the pumps to cool to a safe temperature before fitting lifting eye bolts or starting maintenance work.
Vent and purge the dry pumping system before starting any maintenance work.
Isolate the dry pumping system and other components in the process system from the electrical supply so
that they cannot be operated accidentally. Note that the emergency stop switch on the dry pumping system
is not an electrical isolator.
Wait for at least four minutes after switching off the electrical supply before touching any electrical
component on the dry pumping system.
Route and secure cables, hoses and pipelines during maintenance to avoid possible risk of trips or
entrapment.
The enclosure panels should only be removed when the dry pumping system has been switched off and
allowed to cool sufficiently (as an indication the dry pumping system should be left for one hour with cooling
water still connected with flow characteristics as defined in Section 2).
Wear the appropriate safe ty clothing when coming into contact with contaminated components. Dismantle
and clean contaminated components inside a fume cupboard.
Re-check the pump rotation direction if the electrical supply has been disconnected.
O-ring replacement intervals vary depending on the application.
Dispose of components, grease and oil safely.
Take care to protect sealing faces from damage .
Do not touch or inhale the thermal breakdown products of fluorinated materials which may be present if the
dry pumping system has been overheated to 260 °C and above. These breakdown products are very
dangerous. Fluorinated materials in the dry pumping sy stem include oils , greases and sea ls. The dry pumping
system may have overheated if it was misused, if it malfunctioned or if it was in a fire. Edwards Safety Data
Sheets for fluorinated materials used in the pump are available on request.
The dry pumping system requires little operator maintenance between overhauls. Pump protection sensors fitted to
the dry pumping system do not require routine maintenance. The maintenance operations that can be carried out
are described in the following sections. The frequency of maintenance operations depends on the process. Adjust the
frequency of maintenance operations according to user experience.
When maintaining the dry pumping system, use replacement parts, seals and fittings supplied by Edwards, refer to
Section 7. Ensure that the purge gas and cooling water supplies are connected in parallel and that they meet the
specifications given in Section 2. Contact Edwards for more information.
Note:If the pump is controlled by the MCM MicroTIM then all the configuration options for accessories and set
sequences are stored in the MCM MicroTIM and not in the pump. This means that if a replacement pump is
swapped in it will be unnecessary to configure these options again if using the same MCM MicroTIM.
5.2Relocate the dry pumping system for maintenance
The substances that accumul ate in the exhaust pipe, elbow and check valve can be dangerous. Do
not allow these substances to come into contact with skin or eyes. Do not inhale vapours from
these substances. Fit blanking caps to the inlet and outlet flanges when moving the exhaust pipe,
elbow or check valve around the workplace.
The majority of synthetic oils/grease can cause inflammation of the skin (dermatitis). Safety
precautions must be taken to prevent prolonged skin contact with these substances. Use of
suitable protective gloves and clothing along with a respirator is recommended if contact with the
substance is anticipated. System process gases and residue can be highly toxic. Take all necess ary
precautions when handling components that have, or could have, come into contact with them,
including O-rings, lubricants and all exhaust accessories.
Suitable lifting equipment must be used to move the dry pumping system. It is too heavy to lift by
hand.
Remove bulky accessories such as inlet filters, si lencers and knock out pots before moving the dry
pumping system because they can make the dry pumping system unstable. Do not exceed the
topple angle of 10 ° when moving the pump.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 65
M588-00-880 Issue E
CAUTION
WARNING
Drain the cooling water from the dry pumping system if transporting or storing it in conditions where the cooling
water could freeze. Failure to do so could result in the cooling water freezing in the dry pumping system and
damage occurring to the pump(s) and/or the cooling water pipelines.
To remove the dry pumping system from its operating location and move it to another location to carry out
maintenance, use the following procedure:
1. Purge the dry pumping system and shut down as described in Section 4 and allow the dry pumping system to cool
down.
2. Isolate the power and then disconnect the mating half from the electrical supply connector, then isolate the
water and the gas purge supply.
3. Disconnect the purge gas supply , taking care as any trapped gas under pressure is released. Disconnect the
cooling water supply followed by the cooling water return.
4. Disconnect the inlet and outlet from the va cuum and exh aust systems, remove bulky accessories such as filters,
silencers and knock out pots and then fit blanking caps.
5. If necessary disconnect any other accessories from the dry pumping system.
6. For dry pumping systems with castors, adjust the levelling feet so that the dry pumping system rests on the
castors.
Maintenance
7. Move the dry pumping system to the location where maintenance will be carried out.
After maintenance is complete, re-install the dry pumping system as described in Section 3.
5.3Draining the cooling water
Use of suitable protective gloves and eye protection is recommended when carrying out this
procedure. Personal protective equipment should be checked and used as specified by its supplier.
1. Relocate the dry pumping system for maintenance as stated in Section 5.2.
2. Connect a regulated clean dry air supply (5 barg or 73 psig) to the cooling water supply connection (Figure 3,
item 14). Do not turn on the air supply yet.
3. Connect a drain hose to the cooling water return connection (Figure 3, item 17). Position the open end of the
drain hose in a suitable collection container.
4. Turn on the clean dry air supply.
5. Monitor the drain hose outlet until no further cooling water is purged.
6. Fit the external EMS link plug (supplied) to the EMS connection on the rear of the dry pumping system (Figure 3,
item 22). Failure to do so will result in not being able to purge the water system effectively.
7. Connect the dry pumping system to a suitable mains electrical supply. The control system will now open each
temperature control valve, purging the cooling water from all flow paths. After two minutes, remove the
electrical supply. Wait for 10 seconds and then re-connect the electrical supply and repeat the entire process.
Continue repeating until no further cooling water is purged from the dry pumping system.
8. The cooling water drain procedure is now complete. Disconnect the air supply, electrical supply and the drain
hoses. Dispose of the drained cooling water appropriately.
5.4General maintenance
Do not use cleaning materials based on strong alkalis, aggressive or chlorinated solvents. Do not use cleaning
materials containing abrasives.
The following maintenance can be carried out on the dry pumping system between overhauls, contact Edwards for
details and training:
Check the oil level, see Section 5.4.1.
Inspect the connections, pipelines, cables and fittings, see Section 5.4.2.
Inspect and clean exhaust pipe, elbow and check valve.
5.4.1Checking the oil levels and refilling
Use of suitable protective gloves and eye protection is recommended when carrying out this
procedure. Personal protective equipment should be checked and used as specified by its supplier.
Ensure that the oil levels in the dry pump and the mechanical booster pump (where applicable) are correct. If
a pump oil level is incorrect, pump performance may be affected and the pump may be damaged.
The dry pump and booster (if fitted) each have two sight glasses. One is located on the end cover, refer to Figure 14,
and the other is located on th e gearbox, re fer to Figure 15. Note that the GXS750 dry pumping system has a gearbox
with a sight glass at each end and so Figure 15 applies to both ends. One is accessible from the left hand side of the
dry pumping system and the other is accessible from the right hand side.
GXS 450, 450/2600, 450/4200, 750, 750/2600 and 750/4200 dry pumping systems are provided with slots in the side
panels to enable the oil levels to be checked without removal of the side panels. To check oil levels on these systems:
1. Switch off the dry pumping system and allow it to stand for at least 5 minutes.
2. Check that the oil level is in line with the MAX indicator. If the oil level is below the maximum it must be topped
up.
All other GXS pumps require the dry pumping system side panels to be removed in order to check the oil level. To
check oil levels on these systems:
1. Switch off the dry pumping system and allow it to stand for at least 5 minutes.
2. Remove the side panels.
3. Check that the oil level is in line with the MAX indicator. If the oil level is below the maximum it must be topped
up.
Figure 15 - Location of oil sight glass and fill plug on gearbox
5.4.2Inspect the connections, pipelines, cables and fittings
pending on the application, inspection and cleaning of the exhaust pipe and any e lbows or check valves fitted may
be needed. Contact Edwards for details and training. If the dry pumping system is not relocated for maintenance,
ensure all supplies are locked out and tagged out before starting the following procedure.
1. Remove the enclosure side and top panels.
2. Check that all the connections are secure; tighten any loose co nnections. Inspect all cables, pipelines, hoses and
connections and check that they are not corroded or damaged and do not leak; repair or replace any pipelines,
hoses and connections that are corroded or damaged, or which leak.
3. Refit the enclosure side and top panels.
5.5Overhaul
Do not attempt to overhaul the pump without Edwards training and tooling.
Edwards provides a full range of overhaul opti ons worldwide. Edwards can provide training, tooling and spares to
enable users to overhaul their pumping systems. Contact Edwards for more information.
Edwards and the Edwards logo are trademarks of Edwards Limited.
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M588-00-880 Issue E
WARNING
WARNING
6Transportation, storage and disposal
6.1Transportation
Do not drain the oil from the pump(s) whether dangerous substances have been pumped or not.
Blanking plates must be fitted to seal all vacuum inlet and outlet ports (to prevent possible oil
leakage). Ensure that the dry pumping system is correctly labelled, if in doubt contact Edwards.
Follow the procedure laid out in Section 6.2 and then read form HS1 and fill out form HS2, which can be found at the
back of this manual.
6.2Storage
Drain the cooling water from the dry pumping system. If transporting or storing it in conditions where the cooling
water could freeze, refer t o Section 5.3. Failure to observe the instructions could result in the cooling water freezing
in the dry pumping system and damage to the pump(s) and/or the cooling water pipelines.
Transportation, storage and disposal
Store the dry pumping system as follows:
1. Follow the procedure set out in Section 5.2.
2. Store the dry pumping system in clean dry conditions until required.
3. When required for use, prepare and install the dry pumping system as described in Section 3 of this manual.
6.3Disposal
Dispose of the dry pumping system and any components safely and in accordance with all local and
national safety and environmental requirements.
This equipment may contain a lithium manganese dioxide battery which, under California law,
requires notification for the presence of perchlorate: Perchlorate Material - special handling may
apply, refer to www.dtsc.ca.gov/hazardouswaste/perchlorate/
Edwards products are supported by a world-wide network of Edwards Service Centres. Each Service Centre offers a
wide range of options including disposal. Refer to Section 7.2 for more information.
Pump system materials suitable for recycling include cast SG iron, steel, PTFE, stainless steel, brass, aluminium, zinc
alloy, nickel, mild steel, ABS, polyamide.
Take particular care with the following:
Fluoroelastomers which may have decomposed as the result of being subjected to high temperatures.
Components which have been contaminated with dangerous process substances.
Lithium battery.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Page 71
M588-00-880 Issue E
WARNING
7Service, spares and accessories
7.1Introduction
When returning the dry pumping system to an Edwards Service Centre or other Edwards company,
the requirements of Section 7 and of the Return of Edwards Equipment Procedure (refer to forms
HS1 and HS2 at the rear of this manual) must be complied with.
Note:The oil must not be drained from the dry pumping system. It must be clearly stated that the pump is full
of oil when completing the HS2 form.
Edwards products, spares and accessories are available from Edwards companies and distributors world-wide. These
centres employ Service Engineers who have undergone comprehensive Edwards training courses. Order spare parts
and accessories from the nearest Edwards company or distributor. When ordering, please state for each part
required:
1. Model and Item Number of the equipment.
2. Serial Number (if any).
Service, spares and accessories
3. Item Number and description of the part.
7.2Service
Edwards products are supported by a world-wide network of Edwards Service Centres and distributors. Each Service
Centre offers a wide range of options including: equipment decontamination; service exchange; repair; rebuild and
testing to factory specifications. Equipment that has been serviced, repaired or rebuilt is returned with a full
warranty. The local Service Centre can also provide Edwards engineers to support on-site maintenance, service or
repair of the equipment. For more information about service options, contact the nearest Service Centre or other
Edwards company.
Edwards can provide training, tooling and spares to enable users to overhaul their dry pumping systems.
Remove pump accessories before returning the dry pumping system for service.