Edwards PFPE, E2M28 Instruction Manual

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Instruction Manual

E2M28 and E2M30 Rotary Vacuum Pumps

A373-10-880

Issue U

Original Instructions

Description Item Number

E2M28, 100/200 V, 50 Hz or 100-105/200-210 V, 60 Hz, single-phase A373-15-904 E2M28, 115/230 V, 60 Hz, single-phase A373-15-981 E2M28, 200-240 V, 50 Hz, or 230-240 V, 60 Hz, single-phase A373-15-903 E2M28, 380/400 V, 50 Hz, or 230/460 V, 60 Hz, three-phase A373-33-940 E2M28, 200 V 50/60 Hz, or 380 V, 60 Hz, three-phase A373-33-934 E2M28, 200-240 V, 50 Hz, or 230-240 V, 60 Hz, single-phase (Amphenol) A373-16-903 E2M28, 110/200-240 V, 50 Hz, or 115-120/200-230 V, 60 Hz, single-phase A373-17-984 E2M28-FF, 110/220-240 V, 50 Hz, or 115/200-230 V, 60 Hz, single-phase, (Fomblin) filled A373-25-984 E2M28-FF, 220/240 V, 50 Hz, or 230/240 V, 60 Hz, single-phase A373-25-903 E2M28-FF, 380/400 V, 50 Hz, or 230/460 V, 60 Hz, three-phase A373-43-940 E2M28-FF, 200 V, 50/60 Hz, or 380 V, 60 Hz, three-phase A373-43-934 E2M30, 100/200 V, 50 Hz or 100-105/200-210 V, 60 Hz, single-phase A374-15-904 E2M30, 115/230 V, 60 Hz, single-phase A374-15-981 E2M30, 200-240 V, 50 Hz, or 230-240 V, 60 Hz, single-phase A374-15-903

This product has been manufactured under a quality management system certified to ISO 9001:2015.

P200-00-620 Issue K

2006/42/EC

Machinery directive

2014/35/EU

Low voltage directive (LVD) as applicable to electrical sub-assemblies

2011/65/EU

Restriction of certain hazardous substances (RoHS) directive

EN 1012-2:1996 +A1:2009

Compressors and vacuum pumps. Safety requirements. Vacuum pumps

EN 60034-1:2010

Rotating electrical machines. Rating and performance

EN 61010-1:2010 *

Safety requirements for electrical equipment for measurement, control and laboratory use. General requirements

CSA-C22.2 No.77-2014#

Motors with inherent overheating protection

CSA-C22.2 No.100-2014#

Motors and generators

CSA-C22.2 No.61010-1-12

Safety requirements for electrical equipment for measurement, control and laboratory use – Part 1: General requirements

UL61010-1 3rd Edition

Safety requirements for electrical equipment for measurement, control and laboratory use – Part 1: General requirements

Mr Ian Keech

Date and Place

Declaration of Conformity

Edwards Ltd, Innovation Drive, Burgess Hill, West Sussex, RH15 9TW, UK

The following product

AXXX – YY – ZZZ

Pump type Variant Motor description X YY ZZZ 373 = E2M28 10 to 99 903 = 220 V, 0.75 kW 374 = E2M30 904 = 100/200 V 930 = 220 V, 0.75 kW 934 = 200 V, 50/60 Hz, 380 V, 60 Hz, 3 phase 940 = 380/400 V, 50 Hz, 230/460 V, 60 Hz, 3 phase 981 = 115/230 V, 60 Hz 984 = 110/200-240 V, 0.75 kW – switched to High volt 986 = 110/200-240 V, 0.75 kW – switched to Low volt

Is in conformity with the relevant requirements of European CE legislation:

Based on the relevant requirements of harmonised standards:

*1-phase pumps only The pumps comply with EN 61010-1 when installed in accordance with the instruction manual supplied

with the pumps.

The product also complies with the following:

#1-phase pumps only Canadian Standards Authority and Underwriters Laboratory

This covers all product serial numbers from the date of this declaration onwards.

19.03.2018, Burgess Hill

Vice President Engineering, High Vacuum Division

This declaration is based on the requirements of EN ISO 17050-1 and the relevant directives.

A373-10-880 Issue U

Section Page

1 Introduction .......................................................................................1

1.1 Scope and definitions ................................................................................................... 1

1.2 ATEX directive implications ............................................................................................ 2

1.3 Description ................................................................................................................ 4

1.4 Gas-ballast ................................................................................................................ 4

2 Technical data ....................................................................................5

2.1 Operating and storage conditions ..................................................................................... 5

2.2 Performance .............................................................................................................. 5

2.3 Mechanical data .......................................................................................................... 6

2.4 Lubrication data ......................................................................................................... 6

2.5 Electrical data ............................................................................................................ 7

3 Installation ............................................... ................................... ..... 11

3.1 Safety ..................................................................................................................... 11

3.2 System design ...........................................................................................................11

3.3 Unpack and inspect .....................................................................................................12

3.4 Locate the pump ........................................................................................................12

3.5 Fill the pump with oil ..................................................................................................13

3.6 Electrical installation: single-phase motors ........................................................................13

3.6.1 Introduction .............................................................................................................13

3.6.2 Standard single-phase motors ........................................................................................14

3.6.3 Amphenol version single-phase motors ..............................................................................14

3.6.4 110/200-240 V 50 Hz or 115-120/200-230 V 60 Hz single-phase motors .......................................14

3.7 Electrical installation: three-phase motors .........................................................................19

3.7.1 Connect the electrical supply to the motor ........................................................................19

3.7.2 Check the direction of rotation ......................................................................................20

3.8 Connect the pump inlet ................................................................................................20

3.9 Connect the pump outlet ..............................................................................................21

3.10 Gas-ballast inlet connection ..........................................................................................21

3.11 Leak test the system ...................................................................................................22

Contents

4 Operation ........................................................................................ 23

4.1 ATEX directive implications ...........................................................................................23

4.1.1 Introduction .............................................................................................................23

4.1.2 Flammable/pyrophoric materials ....................................................................................23

4.1.3 Gas purges ...............................................................................................................24

4.2 Gas-ballast control .....................................................................................................24

4.3 Start-up ..................................................................................................................25

4.4 To achieve ultimate vacuum ..........................................................................................25

4.5 To pump condensable vapours ........................................................................................26

4.6 To decontaminate the oil ..............................................................................................26

4.7 Unattended operation ..................................................................................................26

4.8 Shut-down ................................................................................................................26

5 Maintenance ..................................................................................... 27

5.1 Safety information ......................................................................................................27

5.2 Maintenance plan .......................................................................................................27

5.3 Check the oil-level .....................................................................................................28

5.4 Replace the oil ..........................................................................................................28

cg/01/18

A373-10-880 Issue U

Contents

5.5 Inspect and clean the inlet-filter .....................................................................................29

5.6 Clean the gas-ballast filter ............................................................................................30

5.7 Clean the motor fan-cover and enclosure ..........................................................................30

5.8 Clean and overhaul the pump .........................................................................................30

5.9 Replace the run capacitor and test the motor .....................................................................31

5.10 Fit new blades ...........................................................................................................31

5.11 Fault finding .............................................................................................................31

5.11.1 Introduction .............................................................................................................31

5.11.2 The pump has failed to start ..........................................................................................31

5.11.3 The pump failed to achieve specified performance (failure to reach ultimate vacuum) ...................32

5.11.4 The pump is noisy .......................................................................................................32

5.11.5 The pump surface temperature is above 100°C ...................................................................32

5.11.6 The vacuum is not maintained after the pump is switched off ..................................................33

5.11.7 The pumping speed is poor ............................................................................................33

5.11.8 There is an external oil leak ..........................................................................................33

6 Storage and disposal .......... ..... ..... ..... ..... ............................................. 35

6.1 Storage ...................................................................................................................35

6.2 Disposal ...................................................................................................................35

7 Service, spares and accessories .............................................................. 37

7.1 Introduction .............................................................................................................37

7.2 Service ....................................................................................................................37

7.3 Spares .....................................................................................................................37

7.4 Capacitor selection table ..............................................................................................38

7.5 Accessories ...............................................................................................................39

7.5.1 Introduction .............................................................................................................39

7.5.2 Inlet catchpot ...........................................................................................................39

7.5.3 Inlet dust filter ..........................................................................................................39

7.5.4 Inlet desiccant trap .....................................................................................................39

7.5.5 Inlet chemical trap .....................................................................................................39

7.5.6 Outlet mist filter ........................................................................................................39

7.5.7 Solenoid operated pipeline valve ....................................................................................41

7.5.8 Foreline trap .............................................................................................................41

7.5.9 Vibration isolators ......................................................................................................41

7.5.10 Oil drain extension .....................................................................................................41

7.5.11 Pump inlet adaptor .....................................................................................................41

7.5.12 Flexible bellows .........................................................................................................41

7.5.13 Pump outlet adaptor ...................................................................................................41

7.5.14 Gas ballast banjo/elbow assembly ...................................................................................41

7.5.15 Gas ballast valve ........................................................................................................41

8 PFPE-prepared EM pumps ..................................................................... 43

8.1 Introduction .............................................................................................................43

8.2 Installation ............................................................................................................... 43

8.3 Operation ................................................................................................................43

8.4 Maintenance ............................................................................................................. 43

For return of equipment, complete the HS Forms at the end of this manual.

Edwards and the Edwards logo are trademarks of Edwards Limited.

A373-10-880 Issue U

Illustrations

Figure Page

1 The E2M28/E2M30 pump ................................................................................................ 3

2 Dimensions (mm) ........................................................................................................9

3 Electrical supply connection: single-phase motors: 220-240 V 50 Hz and 230-240 V 60 Hz .................15

4 Electrical supply connection: single-phase motors: 100 V 50 Hz, 100-105 V 60 Hz and 115 V 60 Hz ......16

5 Electrical supply connection, single-phase motors: 200 V 50 Hz, 200-210 V 60 Hz and 230 V 60 Hz ......17

6 Electrical supply connection, single-phase motors with Amphenol connector:

220-240 V 50 Hz and 230-240 V 60 Hz ...............................................................................18

7 Motor voltage selection: single-phase motors, 110/200-240 V 50 Hz and 115-120/200-240 V 60 Hz ......19

8 Remove/replace the inlet filter ......................................................................................29

9 Remove/replace the gas-ballast filter ..............................................................................30

10 Accessories ...............................................................................................................40

Tables

Contents

Table Page

1 Operating and storage conditions ..................................................................................... 5

2 Performance data ........................................................................................................5

3 Mechanical data .......................................................................................................... 6

4 Lubrication data ......................................................................................................... 6

5 Electrical data: three-phase motors .................................................................................. 7

6 Electrical data: single-phase motors .................................................................................7

7 Recommended cord sets for -984 pump variants and cable specifications ..................................... 7

8 Checklist of items .......................................................................................................12

9 Motor connection details ..............................................................................................13

10 Maintenance plan .......................................................................................................28

11 Spares item numbers ...................................................................................................37

12 Capacitor kits ............................................................................................................38

13 Capacitor kit selection table ..........................................................................................38

14 Accessory item numbers ...............................................................................................39

Associated publications

Publication title Publication number

Vacuum pump and vacuum system safety P400-40-100 Vibration isolators A248-01-880 EMF3, EMF10 and EMF20 oil mist filters A462-26-880

A373-10-880 Issue U

This page has been intentionally left blank.

Edwards and the Edwards logo are trademarks of Edwards Limited.

A373-10-880 Issue U

CAUTION

WARNING

1Introduction

1.1 Scope and definitions

This manual provides installation, operation and maintenance instructions for the Edwards E2M28 and E2M30 rotary vacuum pumps. The pump must be used as specified in this manual. Read this manual before installing and operating the pump.

Important safety information is highlighted as WARNING and CAUTION instructions that must be followed. The use of WARNINGS and CAUTIONS is defined below.

Warnings are given where failure to observe the instruction could result in injury or death to people. The actual symbol shown varies according to the hazard.

Cautions are given where failure to observe the instruction could result in damage to the equipment, associated equipment and/or process.

Introduction

The units used throughout this manual conform to the SI international system of units of measurement. The following warning labels may be present on the pump and used throughout the product documentation:

Warning - an appropriate safety instruction should be followed or a caution to a pote ntial hazard exists.

Warning - dangerous voltage. Indicates hazards arising from dangerous voltages.

Warning - hot surfaces. To indicate that the marked item can be hot and should not be touched without taking precautions.

Warning - do not block the pump outlet.

Warning - use protective equipment. Indicates that protective equipment must be used.

A373-10-880 Issue U

Introduction

1.2 ATEX directive implications

 This equipment is designed to meet the requirements of Group II Category 3 equipment in accordance with

Directive 94/9/EC of the European P arliament and the Council of 23rd March 1994 on the approximation of the laws of the Member States concerning equipment and protective systems intended for use in potentially explosive atmospheres. (The ATEX Directive).

The ATEX Category 3 applies in respect of potential ignition sources internal to the equipment. An A TEX Category has not been assigned in respect of potential ignition sources on the outside of the equipment as the equipment has not been designed for use where there is an external potentially explosive atmosphere . There is no potential source of ignition within the pump during normal operation but there may be pote nt ial sources of ignition under conditions of predictable and rare malfunction as defined in the Directive.

Accordingly, although the pump is designed to pump flammable materials and mixtures, operating procedures should ensure that under all normal and reasonably predictable conditions, these materials and mixtures are not within explosive limits. Category 3 is considered appropriate for the avoidance of ignition in the case of a rare malfunction which allows flammabl e materials or mixtures to pass through the pump while within their explosive limits.

 When flammable or pyrophoric materials are present within the equipment:

 Do not allow air to enter the equipment.  Ensure that the system is leak tight.

 For further information, please contact Edwards: refer to the Addresses page at the end of this manual for

details of the nearest Edwards company.

Edwards and the Edwards logo are trademarks of Edwards Limited.

Figure 1 - The E2M28/E2M30 pump

1. Oil filler

2. Outlet nozzle

3. Gas -ballast control

4. Gas-ballast inlet

5. Centring-ring and O-ring (supplied)

6. Inlet-port (adaptor flange)

7. Cable-gland/Amphenol connector position

8. Motor terminal box

9. On/Off switch

10.Box section skids

11.Oil drain-plug (gravity drain)

12.Oil sight-glass

13.Pump identification label

14.Oil drip tray

A373-10-880 Issue U

Introduction

Notes: 1. A pump with a single-phase motor is shown in this figure.

2. The motor shown in this figure is not representative of the motor used on th e E2M28 (A mphenol) pump with Item Number A373-17-984. On this pump, items 7 and 9 are transposed, with Item 7 being an IEC60320 16-20 Amp socket.

A373-10-880 Issue U

Introduction

1.3 Description

The Edwards E2M28 and E2M30 pumps are shown in Figure 1. Refer to Figure 1 for item numbers in brackets in the following descriptions.

The E2M28 and E2M30 pumps are two-stage, direct drive, sliding vane pumps. The pump is oil-sealed and designed for reliable, long-term operation in both laboratory and industrial environments. The pump is a free-standing unit. The drive is provided through a flexible coupling by a single-phase or three-phase (four pole) motor.

The motors are totally enclosed and are cooled by the motor-cooli ng fan wh ich directs air along the motor fins. The single-phase motors have a thermal overload device. When the motor is too hot, the thermal overload device

switches off the pump. The thermal overload device has an automatic reset; when the motor cools down, the d evice resets and the motor will restart. The single phase motors have an on/off switch.

An oil pressure system lubricates the pump shaft bearing surfaces and rotor sealing faces. The pump has an oil distribution valve which prevents discharge of oil to the pump interior (suckback) after the pump stops. The pumping chambers are air-tight, so this arrangement prevents air suckback unless the gas-ballast valve is open. For protection in this case, refer to Section 1.4.

The level and condition of oil in the oil box reservoir can be inspected through the oil sight-glass (12). An oil fillerplug (1) is fitted to the top of the oil box. The pump has an oil drain-plug (11) to allow gravity oil drain.

The pump has an inlet-port (6), outlet nozzle (2) and gas-ballast control (3). The pump is mounted on two mild steel box section skids (10) on rubber pads. Details of suitable vibration isolators and other recommended acces sories are given in Section 7.5.

1.4 Gas-ballast

To pump high vapour loads, gas-ballast is delivered into the pump to prevent condensation of the vapour carried by the pumped gases.

Air (or another gas) can be introduced into the low vacuum stage through the gas-ballast control. The gas-ballast control is a multi-turn valve which can be adjusted, as required, between closed and fully open.

Edwards and the Edwards logo are trademarks of Edwards Limited.

A373-10-880 Issue U

2Technical data

2.1 Operating and storage conditions

Note: To comply with EN 61010 and CSA standar ds, the p ump must be insta lled and u sed indo ors, and within the

operating conditions specified in Table 1 below.

Table 1 - Operating and storage conditions

Par ameter Reference Data

Ambient temperature range (operation) 13 to 40°C Ambient temperature range (storage) -30 to 70°C Normal surface temperature of the pump-body Maximum humidity (operation) 90% RH Maximum altitude (operation) 2000 m Pollution degree 2 Installation category II Noise level at 1 metre 57 dB(A) (at 50 Hz) Vibration severity

At ultimate vacuum, with ambient temperature of 20°C.

†

Measured at the inlet port to ISO 2372 (1974)

†

45 to 65°C

Class 1C

Technical data

2.2 Performance

Note: Where total pressures are shown in Table 2 below, measurements were taken using an untrapped total

pressure capacitance diaphragm gauge on a header, as specified by Pneurop standards.

Table 2 - Performance data

E2M28 E2M30

50 Hz electrical supply 32.2 m 60 Hz electrical supply 38.9 m3 h

Maximum pumping speed - Pneurop

50 Hz electrical supply 27.5 m 60 Hz electrical supply 33.0 m3 h

Motor rotational speed

50 Hz electrical supply 1440 r min 60 Hz electrical supply 1720 r min

Ultimate vacuum

without gas-ballast (partial pressure) 1 x 10

without gas-ballast (total pressure) 1 x 10-3 mbar

with full gas-ballast (partial pressure) 2 x 10

Maximum water vapour inlet pressure 30 mbar

3 h-1

-4

mbar

1 x 10-2 Pa

-1

1 x 10

-1

mbar

2 x 101 Pa

3 x 10

-1

19 cfm 23 cfm

16.2 cfm

19.4 cfm

-4

-1

torr

1440 r min 1720 r min

7 x 10-5 torr

7 x 10

1.5 x 10-1 torr

22.5 torr

A373-10-880 Issue U

Technical data

Table 2 - Performance data (continued)

E2M28 E2M30

Maximum water vapour pumping rate 0.7 kg h Maximum permitted outlet pressure (for full pump throughout) 0.5 bar gauge

1.5 bar absolute

1.5 x 105 Pa

2.3 Mechanical data

Table 3 - Mechanical data

Parameter Reference Data

Approximate pump mass 44 kg Dimensions Refer to Figure 2 Degree of protection

Single-phase motors IP44

Three-phase motors IP54 Pump inlet port NW25 (the flange can be removed from the 1 inch BSP threaded hole) Pump outlet port 15 mm external diameter nozzle (the nozzle can be removed from the 3/4 inch BSP

threaded hole)

-1

0.5 bar gauge

1.5 bar absolute

1.5 x 105 Pa

0.7 kg h

-1

2.4 Lubrication data

Note: Edwards Material Safety Data Sheets for the oils specified below are available on request.

Table 4 - Lubrication data

Hydrocarbon pumps:

Recommended oil Maximum oil capacity 1.32 litres

PFPE - prepared EM pumps:

Recommended oil Maximum oil capacity 1.32 litres

To operate the pump when the ambient temperature is outside the range specified in Section 2.1, or to optimise pump performance when processing condensable vapours, a different oil may be used.

Ultragrade 19

Krytox 1506 or Fomblin 06/6

Edwards and the Edwards logo are trademarks of Edwards Limited.

A373-10-880 Issue U

2.5 Electrical data

Refer to Table 5 and 6. For motor current information please refer to the motor rating plate. The motor start-up current is drawn for less than one second, so use time-lag fuses to prevent unnece ssary fuse failure whe n the pu mp starts. Fuses should be to EN60269 Section 2.2. If the pump is used at temperatures lower than 13°C, the start-up current will be drawn for longer; this may cause the motor thermal overload device to open.

Table 5 - Electrical data: three-phase motors

Pump Item Number Voltage (V) Frequency (Hz)

A373-33-940 380/400 and 230/460 50/60 A373-33-934 200 and 200/380 50/60 A373-43-940 380/400 and 230/460 50/60 A373-43-934 200 and 200/380 50/60 Motor output rating (continuous)

50 Hz operation 0.75 kW 60 Hz operation 0.90 kW

Table 6 - Electrical data: single-phase motors

Technical data

Pump Item Number Voltage (V) Frequency (Hz)

A373-15-903, A373-16-903, A374-15-903

A373-15-981, A374-15-981 115 60

A373-15-904, A374-15-904 100 50

A3 73 -1 7-984, A373-25-984 110 50

Motor output rating (continuous)

50 Hz operation 0.75 kW 60 Hz operation 0.90 kW

Table 7 - Recommended cord sets for -984 pump variants and cable specifications

220-240 50 230-240 60

230 60

100-105 60

200 50

200-210 60

115-120 60 200-240 50 200-230 60

Description Rating Coupler type Item number

Cord set assembly, UK Cable style = H05VV-F, 3 x 1.5 mm

70 °C, maximum length of 2.5 metres Plug type = BS1363 UK plug Appliance coupler = IEC60320 style C19 Fuse type = BS1363 10 Amp fuse, to an

IEC60320 style

, 300 V,

Straight entry

Right angled entry

A50505003

A50505006

A373-10-880 Issue U

Technical data

Table 7 - Recommended cord sets for -984 pump variants and cable specifications

Cord set assembly, Europe Cable style = H05VV-F, 3 x 1.5 mm2, 300 V,

70 °C, maximum length of 2.5 metres Plug type = European Schuko VDE approved,

16 A 250 V rated with dual earthing contact Appliance coupler = IEC60320 style C19

Cord set assembly, USA/Canada (200 - 230 V)

Cable style = SJT, 3 x 14 AWG, 300 V, 90 °C, VW-1 maximum length of 3.0 metres

Plug type = NEMA, 6-15P plug Appliance coupler = IEC60320 style C19

Straight entry

Right angled entry

A50506003

A50506006

N/A

Edwards and the Edwards logo are trademarks of Edwards Limited.

Figure 2 - Dimensions (mm)

1. Top view of pump with single-phase motor

2. Side view of pump with single-phase motor

3. Side view of pump with three-phase motor

4. Front view of pump with single-phase motor

Pump Item Number Dimension (mm)

Single-phase motors AB

A373-15-903, A373-16-903, A374-15-903 - 251 A373-15-981, A374-15-981 598 251 A373-15-904, A374-15-904 598 251 A373-17-984, A373-25-984 - 251

Three-phase motors

A373-33-940, A373-33-934, A373-43-940, A373-43-934

-229

A373-10-880 Issue U

Technical data

A373-10-880 Issue U

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Edwards and the Edwards logo are trademarks of Edwards Limited.

3 Installation

WARNING

3.1 Safety

Ensure that the installation technician is familiar with the safety procedures which relate to the pump oil and the products handled by the pumping system.

If a hydrocarbon oil is used in this pump, do not use the pump to process oxygen in concentrations greater than 25% in volume. If the oxygen concentration is greater than 25%, there is a risk of fire or explosion in the oil-box of the pump.

Do not use the E2M28 or E2M30 pump to pump hazardous substances.

A373-10-880 Issue U

Installation

Obey the safety instructions listed below and take note of appropriate precautions. If not, injury to people and damage to equipment can result.

Prevent any part of the human body from coming into contact with the vacuum.

 Wear the appropriate safe ty clothing when coming into contact with contaminated components is

anticipated. Dismantle and clean contaminated components inside a fume cupboard.

 Vent and purge the vacuum system before starting installation work.  Take suitable precautions to avoid the inhalation of oil mist and excessive skin contact with pump oil, as

prolonged exposure can be harmful.

 Disconnect the other components in the pumping system from the electrical supply so that they cannot be

operated accidentally.

 Safely route any electrical supply cables so that they cannot accidentally trip people.  Ensure that the E2M28 or E2M30 pump is suitable for the application. If there is any doubt as to the

suitability of the pump for the application, refer to the Edwards guidelines on vacuum pump and vacuum system safety (refer to the Associated Pub lication at the end of the contents list at the front of this manual) or contact Edwards for advice.

3.2 System design

Consider the following points when designing the pumping system:

 Edwards recommends the use of a foreline vacuum isolation valve to allow the pump to warm up before

pumping condensable vapours or if a vacuum needs to be maintained when the pump is not running.

 Avoid high levels of heat input to the pump from the process gases, otherwise the pump may overheat and

seize, and cause the motor thermal overload device to open.

 If using the pump in a high ambient temperature with a high gas throughput, the temperature of the pump

body may exceed 70 °C. Edwards recommends the use of additiona l guarding to prevent contact with hot surfaces under these conditions.

A373-10-880 Issue U

WARNING

Installation

 Make sure that the exhaust pipeline canno t b ecom e blo cke d. If an ou tle t-i sola ti on val ve is fi tt ed , ma ke su re

the pump cannot be operated with the valve closed.

 Provide for a purge of inert gas when shutting down the pumping system, to dilute dangerous gases to safe

concentrations. A suitable gas-ballast control valve for introduction of purge gas into the pump is available as an accessory (refer to Section 7.5.15). Contact the Edwards Application team for further advice on dilution requirements if required.

3.3 Unpack and inspect

Quantity Description Check ()

1 E2M28 or E2M30 rotary vacuum pump 

(1) Fitting pack containing the following:

1 NW25 centring-ring  1 O-ring for centring-ring  1 Receptacle connectors

Various sizes: supplied with single-phase motors except for pumps with Item Numbers A373-16-903, A373-17-984 and A373-25-984.

Table 8 - Checklist of items



1. Remove all packing materials and protective covers and check the pump. If the pump is damaged, notify the supplier and the carrier in writing within three days; state the Item Number of the pump together with the order number and the supplier's invoice number. Retain all packing materials for inspection. Do not use the pump if it is damaged.

2. Check that the packa ge contains the items listed in Table 8. If any of these items are missing, notify the supplier within 3 days.

If the pump is not to be used immediately, replace the protective covers. Store the pump in suitable conditions, as described in Section 6.1.

3.4 Locate the pump

Attach mechanical lifting equipment to the eye on the pump. Failure to use suitable lifting equipment can result in injury to people or damage to the pump. Refer to Section 2.3 for the mass of the pump.

The pump can be either free-standing on its box section skids, or be fixed by bolts through the four fixing holes in the box section skids, or be used with vibration isolators. For t he locations of the fixing holes in the box section skids, refer to Figure 2.

Provide a firm, level platform for the pump. Locate the pump so that the oil-level sight-glass is visible and the oil filler-plug, oil drain-plugs and gas -ballast control are accessible.

If the pump will be located inside an enclosure, make sure that there is adequate ventilation at both ends of the pump, so that the ambient temperature around the pump does not exceed 40°C. There must be a minimum space of 25 mm between the pump and the enclosure walls.

Edwards and the Edwards logo are trademarks of Edwards Limited.

A373-10-880 Issue U

CAUTION

WARNING

3.5 Fill the pump with oil

Fill the pump with oil as described below. Refer to Figure 1 for the item numbers in brackets.

1. Remove the oil filler-plug (1).

2. P our oil into the pump until the oil-le vel reaches the MAX mark on the bezel at the top of the oil sight-gla ss (12). If the oil-level goes above the MAX mark, remove the oil drain-plug (11) and drain the excess oil from the pump.

3. After a few minutes, recheck the oil-level. If the oil-level is now below the MAX mark, pour more oil into the pump.

4. Refit the oil filler-plug. Tighten the plug firmly by hand. Do not overtighten.

3.6 Electrical installation: single-phase motors

Ensure that the electrical installation of the pump conforms with local and national safety requirements. The pump must be connected to a suitably fused and protected electrical supply with a suitable earth point. For recommended cord sets refer to Section 2.4.

Installation

Ensure that the motor is correctly configured for the electrical supply voltage and frequency. If not, the motor can be damaged.

3.6.1 Introduction

Note: The pump will restart automatically when the electrical supply is restored after an interruption and when

the pump cools after it has overheated. If automatic pump restart is not desired, use electrical control equipment that must be reset manually.

Ensure that the electrical supply voltage corresponds with the voltage specified on the motor data pla te. Edwards recommends that connecting the electrical supply to the motor through a starter or circuit breaker that has

thermal over-current protection and can be adjusted to suit the full-load current ratings shown on the motor rating plate. The fuse ratings must be calculated by a qualified electrician. The supplier of the thermal over-current protection device may specify fuse ratings to ensure correct operation of the over-current protection device. Ensure that the fuse used is suitable for the starting currents given on the motor rating plate.

The diameter of the outer sheath of the electrical supply cable must be within the range 7 to 10.5 mm. The cable must conform in size and colour coding with local and national electrical installation regulations. The temperature rating of the cable must be 70°C or greater.

Table 9 - Motor connection details

Pump Item Number Voltage (V) Frequency (Hz)

A373-16-903 (all) 50/60 6 A373-15-903, A374-15-903 (all) 50/60 3 A373-15-981, A374-15-981 115 60 4

230 60 5

Connection details:

refer to Figure

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Installation

Table 9 - Motor connection details

Pump Item Number Voltage (V) Frequency (Hz)

A373-15-904, A374-15-904 100 50 4

100-105 60 4

200 50 5

200-210 60 5

A373-17-984, A373-25-984 (all) 50/60 7

Connection details:

refer to Figure

3.6.2 Standard single-phase motors

1. Remove the cover from the motor terminal box (Figure 1, item 8).

2. Remove the cable-gland from the inside of the terminal-box and fit the cable-gland to the cable leadthrough hole in the side of the terminal-box. Using a tool, tighten to a torque of 5 Nm.

3. Pass the electrical supply cable through the gland.

4. Remove the receptacle connectors from the fitting pack.

5. Fit a ring connector to the earth (ground) wire.

6. Select the correct size of receptacle connectors for the cable wires:

 Use the red connectors for wire sizes 0.75 to 1.5 mm  Use the blue connectors for wire sizes 1. 5 to 2.5 mm

7. Attach the appropriate connector to the live and neutral wires.

8. Connect the electrical supply cable to the appropriate terminals as shown in Figure 3 to 5. Tighten the earth (ground) terminal connection to a torque of 2.13 to 2.87 Nm.

9. Tighten the dome shaped nut on the cable-gland until the outer sheath of the cable is firmly gripped. Using a tool, tighten to a torque of 4 Nm. Do not overtighten.

10.Check that the cable connections are correct, then refit the cover on the motor terminal-box.

3.6.3 Amphenol version single-phase motors

When selecting the mating half of the amphenol connector, please ensure that it is compatible. The protective earth (ground) connection is required to make first and break last with respect to the other

connections. Connect the electrical supply cable to the appropriate pins as shown in Figure 6.

3.6.4 110/200-240 V 50 Hz or 115-120/200-230 V 60 Hz single-phase motors

The motor is designed for a single-phase electrical supply and is suitable for 50 Hz and 60 Hz operation. The motor can be manually switched between nominal supply voltages of 110-120 V and 200-240 V.

Use the following procedure to check that the voltage selector switch is correctly positioned for the electrical supply voltage:

1. Refer to Figure 7. Undo the three screws securing the terminal box cover (1) and remove the cover.

2. Check the positi on of the volta ge selector switch (6). If the switch is in the correct position, continue at Step 3. If the voltage selector switch (6) is in the wrong position, press the switch to select the alternative position.

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3. Refit the terminal box cover and secure with the three screws.

When selecting the mating half of the connector, please ensure that it is compatible (IEC60320 C19 female).

Figure 3 - Electrical supply connection: single-phase motors: 220-240 V 50 Hz and 230-240 V 60 Hz

Installation

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Wire colour codes:

BN Brown VT Violet GY Grey WH White OR Orange

Installation

Figure 4 - Electrical supply connection: single-phase motors: 100 V 50 Hz, 100-105 V 60 Hz and 115 V 60 Hz

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Wire colour codes:

BN Brown VT Violet GY Grey WH White OR Orange

Figure 5 - Electrical supply connection, single-phase motors: 200 V 50 Hz, 200-210 V 60 Hz and 230 V 60 Hz

Installation

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1. Live

2. Neutral

3. Not used Earth (ground)

Pin codes:

Installation

Figure 6 - Electrical supply connection, single-phase motors with Amphenol connector:

220-240 V 50 Hz and 230-240 V 60 Hz

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CAUTION

WARNING

A. Top view of motor B. Internal view of top of motor C. On/off switch

1. Terminal box cover

2. Electrical inlet socket

3. On/Off switch

4. Position 'I' (on)

5. Position 'O' (off)

6. Voltage selector switch

7. Position 'II' (high voltage setting 200 – 240 V)

8. Position 'I' (low voltage setting 110 – 120 V)

Figure 7 - Motor voltage selection: single-phase motors, 110/200-240 V 50 Hz and 115-120/200-240 V 60 Hz

Installation

3.7 Electrical installation: three-phase motors

3.7.1 Connect the electrical supply to the motor

Ensure that the motor is correctly configured for the electrical supply voltage and frequency. If not, the motor can be damaged.

Note: To prevent automatic restart of the pump-motor if the electrical supply is restored after an electrical

supply failure, connect the pump to the electrical supply through suitable control equipment which must be reset manually after an electrical supply failure.

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CAUTION

Edwards recommends connecting the electrical supply to the motor through a starter or circuit breaker that has thermal over-current protection and can be adjusted to suit the full-load current ratings shown on the motor rating plate. The fuse ratings must be calculated by a qualified person. The supplier of the thermal over-current protection device may specify fuse ratings to ensure correct operation of the over-current protection device. Ensure that the fuse used is suitable for the starting currents given on the motor rating plate.

The diameter of the outer sheath of the electrical cable must be in the range 10-14 mm. The cable must conform in size and colour coding with local and national electrical installation regulations. The temperature rating of the cable must be 70 °C or greater.

1. Remove the cover from the motor terminal-box.

2. Remove the cable-gland from the inside of the terminal-box and fit the cable-gland to the cable leadthrough hole in the side of the terminal-box. Using a tool, tighten to a torque of 3.75 Nm .

3. For motor wiring information refer to the wiring diagram supplied in the motor terminal box. The dual voltage motors can be configured to operate with either the high range or low range electrical supply.

4. Pass the electrical supply cable through the cable-gland and connect to the appropriate terminals. Tighten the earth (ground) terminal connection to a torque of 2.13 to 2.87 Nm.

5. Tighten the dome shaped nut on the cable gland until the outer sheath of the cable is firmly gripped. Using a tool, tighten to a torque of 2.5 Nm. Do not overtighten.

6. Ensure that the gasket seal for the terminal box cover is correctly positioned, then refit the cover to the terminal-box and secure with the screws.

3.7.2 Check the direction of rotation

This page has been intentionally left blank.

Ensure that the motor rotates in the correct direction. If it does not, the pump and the vacuum system can become pressurized when operating the pump.

1. With the pump inlet unconnected, watch the motor cooling-fan through the motor fan-cover.

2. Switch on the electrical supply to the motor for a few seconds, then switch off the electrical supply again.

3. Check that the motor cooling-fan rotates in the correct direction shown by the arrow on the motor mounting plate. If the direction of rotation is incorrect:

 Switch off the electrical supply immediately.  Isolate the pump from the electrical supply.  Remove the terminal-box cover and swap wire s L1 an d L3: refer to the wiring diagram supplied in the motor

terminal box.

 Refit the cover to the terminal-box.

3.8 Connect the pump inlet

Take note of the following information when connecting the pump to the vacuum system. Refer to Section 7.5 for details of the accessories mentioned below.

 For optimum pumping speeds, ensure that the pipeline connected to the inlet-port is as short as possible and

has an internal diameter not less than the inlet-port diameter.

 Support the vacuum pipelines to prevent loading of the coupling-joints.  If necessary, incorporate flexible bellows in the system pipelines to reduce the transmission of vibration and

to prevent loading of coupling-joints. If using flexible bellows, ensure that the bellows have a maximum

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WARNING

pressure rating that is greater than the highest pressure that can be generated in the system. Edwards recommends using Edwards flexible bellows.

 Use a suitable inlet catchpot if pumping condensable vapours or if using the pump for very dusty

applications.

 Ensure that sealing surfaces are clean and scratch-free.

Connect the vacuum system to the inlet-port (Figure 1, item 6). To make this connection:

 Connect to the NW25 flange supplied: use the NW25 centring-ring and O-ring supplied.  Remove the NW25 flange and connect to the 1 inch BSP threaded hole.  Use an NW25 to 28 mm bore tube adaptor available as an optional accessory, refer to Section 7.5.11.

3.9 Connect the pump outlet

Connect the pump outlet to a suitable treatment plant to prevent the discharge of dangerous gases and vapours to the surrounding atmosphere.

Installation

Use a catchpot to prevent the drainage of contaminated condensate back into the pump.

The exhaust system must be configured so that the maximum pressure at the pump outlet does not exceed 0.5 bar gauge (1.5 bar absolute, 1.5 x 105 Pa) at full pump throughput.

Edwards recommends fitting an oil mist filter to the pump outlet in the following circumstances:

 If using the pump with the gas-ballast control open.  If operating the pump with an inlet pressure greater than 10 mbar for extended periods.  If frequently pumping down from atmospheric pressure.

The mist filter will trap the oil exhausted from the pump: the oil can be reused if it is not contaminated. To connect the pump to outlet accessories or to the exhaust treatment plant:

 Connect 15 mm internal diameter vacuum or plastic hose to the outlet nozzle (Figure 1, item 2).  Remove the outlet nozzle and connect to the 3/4 inch BSP threaded hole.  Remove the outlet nozzle and replace it with an NW25 flange adaptor (available as an optional accessory,

refer to Section 7.5.13) and then connect to the NW25 flange.

3.10 Gas-ballast inlet connection

The position of the gas-ballast inlet is shown in Figure 1 (item 4). The gas-ballast inlet has several filters (shown in

Figure 9) to trap any dust and debris if using air as the gas-ballast supply.

If using a different gas for the gas-ballast supply, or if connecting a valve to the gas-ballast inlet:

1. Remove the filters (as described in Section 5.6).

2. Connect the gas supply or valve to the 1/4 inch BSP threaded hole.

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Installation

3.11 Leak test the system

Leak-test the system and seal any leaks found, after instal ling the pump, to prevent leakage of substances out of the system and leakage of air into the system.

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WARNING

4 Operation

Do not expose any part of the body to vacuum. Failure to follow instructions can cause injury to people.

Note: If the pump is PFPE-prepared, please refer to Section 8.

4.1 ATEX directive implications

4.1.1 Introduction

This equipment is designed to meet the requirements of Group II Category 3 equipment in accordance with Directive 94/9/EC of the European Parli ament and the Council of 23rd March 1994 on the approximation of the laws of the Member States concerning equipment and protective systems intended for use in potentially explosive atmospheres. (The ATEX Directive)

Operation

There is no potential source of ignition within the pump during normal operation but there may be potential sources of ignition under conditions of predictable and rare malfunction as defined in the Directive. Accordingly, although the pump is designed to pump flammable materials and mixtures, operating pr ocedures should ensure that under all normal and reasonably predictable conditions, these materials and mixtures are not within explosive limits. Category 3 is considered appropriate for the avoidance of ignition in the case of a rare malfunction which allows flammable materials or mixtures to pass through the pump whilst within their explosive limits.

4.1.2 Flammable/pyrophoric materials

Obey the instructions and take note of the precautions given below, to ensure that pumped gases do not enter their flammable ranges.

When flammable or pyrophoric materials are present within the equipment:

 Do not allow air to enter the equipment.  Ensure that the system is leak tight.  Use an inert gas purge (for example, a nitrogen purge) to dilute any flammable gases or vapours entering the

pump inlet, and/or use an inert gas purge to reduce the concentration of flammable gases or vapours in the pump and in the exhaust pipeline to less than one quarter of the gases' published lower explosive limits (LEL).

 Use an inert gas purge into the pump gas ballast connection to prevent the condensation of flammable

vapours within the pump mechanism and exhaust pipeline.

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WARNING

Operation

4.1.3 Gas purges

If using inert gas purges to dilute dangerous gases to a safe level, ensure that the pump will shut down if an inert gas supply fails.

Obey the instructions and take note of the precautions given below, to ensure that pumped gases do not enter their flammable ranges.

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 an y remaining flammable gases or vapours have been purged from the pump and exhaust pipeline.

If liquids that produce flammable vapours could be present in the pump foreline, then the inert gas purge to the pump 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 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 purge flow rate. If the flow rate falls below that required, stop the flow of flammable gases or vapours into the pump.

Note: Edwards recommends obtaining and reading the Vacuum Pump and Vacuum System Safety manual

(publication number P400-40-100), available from Edwards or the supplier.

4.2 Gas-ballast control

Use the gas-ballast control Figure 1, item 3) to change the flow of gas-ballast into the low vacuum stage of the pump, and to provide an additional oil-feed to the pump mechanism.

Use the gas-ballast control closed:

 To achieve ultimate vacuum.  To pump dry gases.

Turn the gas-ballast control six turns anti-clockwise to open it fully. Use the gas-ballast control open:

 To pump high concentrations of condensable vapour.  To decontaminate the oil.

When operating the pump with the gas-ballast control open, there will be an increased rate of oil loss from the pump. Ideally, a mist filter and oil return kit should be used on clean applications.

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WARNING

4.3 Start-up

Do not block the pump outlet or allow the outlet pressure to rise above 1.5 bar absolute as the oil box may fracture and may cause injury to people nearby.

If the oil is contaminated, or if the pump tempera ture is below 13 °C, or if the electrical supply voltage is more than 10% below the lowest voltage specified for the pump, the pump may operate at a reduced s peed for a few minutes. On single-phase pumps, if the pump continues to operate at reduced speed, the motor thermal overload device w ill open and stop the pump. When the motor has cooled, the thermal overload device will reset automatically and the pump will restart.

1. Check that the pump oil-level is between the MAX and MIN marks on the bezel of the oil-level sight-glass; if it is not, refer to Section 5.3.

2. Turn the gas-ballast control to the required position (refer to Section 4.2).

3. Switch on the electrical supply to the pump.

4. Check that the oil-level in the sight-glass drops slightly (by 3 to 5 mm) after start-up. This shows that the pump has primed with oil.

Operation

5. If the pump fails to prime, operate the pump with the inlet open to atmosphere for approximately 30 seconds, then isolate the inlet and check that the oil-level drops by 3 to 5 mm.

6. To achi eve ultimate vacuum, pump condensable vapours or decontaminate the pump oil, refer to the procedures in Section 4.4, 4.5 and 4.6 respectively. Otherwise, open the vacuum system isolation-valve.

4.4 To achieve ultimate vacuum

If the pump does not achieve the performance specified in Section 2.2, make sure that this is not due to the system design before contacting the supplier or Edwa rds for advice, In particular, the vapour pressure of all materials used in the vacuum system (including pump oil, refer to below) must be much lower than the specified ultimate vacuum of the pump.

Refer to Section 5.11.3 for a list of possible causes for failure to achieve the specified performance; note however that the most common causes are:

 The pressure measurement technique or gauge head is unsuitable or the gauge head is faulty.  An oil other than the recommended oil has been used, and the vapour pressure of the oil is higher than the

specified ultimate vacuum of the pump.

Use the following procedure to achieve ultimate vacuum:

1. Isolate the pump from the vacuum system.

2. Turn the gas-ballast control fully anti-clockwise (fully open) and operate the pump for at least 1 hour (or overnight) to thoroughly purge the oil of contaminants.

3. Close the gas-ballast control.

4. Open the vacuum system isolation-valve and pump down to ultimate vacuum.

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Operation

4.5 To pump condensable vapours

Use gas-ballast (open the gas-ballast control) when there is a high proportion of condensable vapours in the process gases:

1. Close the vacuum system isolation-valve.

2. Turn the gas-ballast control anti-clockwise to fully open and operate the pump for 30 minutes to warm the oil; this will help to prevent vapour condensation in the pump.

3. Open the vacuum system isolation-valve and continue to operate the pump with the gas-ballast control open.

After pumping condensable vapours, decontaminate the oil, if necessary, using the procedure in Section 4.6.

4.6 To decontaminate the oil

The oil in the pump should be clear. If the oil is cloudy or discoloured, it is contaminated with process vapours.

1. Look at the condition of the oil in the oil sight-glass (Figure 1, item 12). If the oil is cloudy or discoloured, continue with the procedure at Step 2 below.

2. Close the vacuum system isolation-valve.

3. Turn the gas-ballast control fully anti-clockwise.

4. Operate the pump until the oil is clear.

4.7 Unattended operation

The pump is designed for unattended operation under the normal operating conditions specified in Section 2.1. However, Edwards recommends checking the pump at a regular interval of not more than 14 days. Check the pump more frequently if pumping high volumes of gas or if operating the pump with the gas-ballast control open.

Single-phase motors are cooled by internal fans. These motors have a thermal overload device. When the motor is too hot, the thermal overload device switches off the pump. The thermal overload device has an automatic reset; when the motor cools down, the device resets and the motor will restart.

When checking the pump, make sure that the pump is not going through a repetitive cycle of thermal overload failures and automatic resets. If necessary, reduce the thermal load from the pumped gases to prevent overheating of the pump.

4.8 Shut-down

Note: If the gas-ballast control is open and the motor is switched off for any reason, the pump drive shaft may

rotate in the reverse direction, causing a system pressure rise. To prevent this, use a gas-ballast control valve (refer to Section 7.5.15).

Edwards recommends, as described in the procedure below , decontaminating the oil before shutting down the pump. This will prevent damage to the pump by the contaminates in the oil.

1. Refer to Section 4.6 and decontaminate the oil, as required.

2. Close the vacuum system isolation-valve (if not already closed).

3. Close gas-ballast (that is, turn the gas-ballast control clockwise).

4. Switch off the electrical supply to the pump.

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5Maintenance

CAUTION

WARNING

5.1 Safety information

Allow the pump to cool (so that it is at a safe temperature for skin contact) before starting maintenance work. Make sure the pump is switched off in case the thermal overload device restarts the pump.

Obey the safety instructions given below and take note of appropriate precautions. Failure to follow instructions can cause injury to people and damage to equipment.

Never use hydrocarbon lubricants in a PFPE-prepared pump.

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Maintenance

Note: If the pump is PFPE-prepared, refer to Section 8.

 A suitably trained and supervised technician must maintain the pump.  Ensure that the maintenance technician is familiar with the safety procedures which relate to the pump-oil

and the products processed by the pumping-system.

 Isolate the pump and other components in the pumping system from the electrical supply so that they can

not be operated accidentally.

 After maintenance is completed, recheck the pump rotation direction if the electrical supply has been

disconnected.

 Do not reuse O-rings and seals if they are damaged.  The pump and its oil will be contaminated with the process chemicals that have been pumped during

operation. Ensure that the pump is decontaminated before maintenance and that adequate precautions are taken to protect people from the effects of dangerous substances if contamination has occurred.

 Leak-test the system, after maintenance work is complete, if any vacuum or exhaust joints were

disconnected or connected. Seal any leaks found.

 Do not touch or inhale the thermal breakdown products of fluorinated materials which may be present if the

pump has been heated to 260°C and above. These breakdown products are very dangerous. Fluorinated materials in the pump may include oils, greases and seals. The pump may have overheated if it was misused, if it malfunctioned or if it was in a fire. Edwards Material Safety Data sheets for fluorinated materials used in the pump are available on request: contact the supplier or Edwards.

5.2 Maintenance plan

The plan shown in Table 10 details the routine maintenance operations necessary to maintain the pump in normal use. Instructions for each operation are given in the section shown.

More frequent maintenance may be required if the pump is used to proces s corrosive or abrasive gase s and vapours. In these circumstances, Edwards recommends that replacing the pump seals every year. If necessary, adjust the maintenance plan according to experience.

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Maintenance

When maintaining the pump, use Edwards spares and maintenance kits; these contain all of the components necessary to complete maintenance operations successfully. The Item Numbers of the spares and kits are given in

Section 7.3.

Examine the condition of any external accessories, filters or traps (if fitted) when maintaining the pump. Refer to the instructions supplied with these accessories for the necessary maintenance procedures.

Table 10 - Maintenance plan

Operation Frequency Refer to Section

Check the oil level As required; at least monthly 5.3 Replace the oil 3 to 6 months depending on

application Inspect and clean the inlet filter Every oil change 5.5 Clean or replace the gas-ballast filter Yearly 5.6 Clean the motor fan-cover and enclosure Yearly 5.7 Clean and overhaul the pump and replace

the blades as necessary Replace the run capacitor Every 4 years 5.9 Test the motor condition Every 4 years 5.9 Fit new blades Every 30000 hours of operation 5.10

3 to 4 years depending on

application

5.4

5.8

5.3 Check the oil-level

Notes: 1. If required, the oil-level can be checked while the pump is operating, however, switch off the pump and

isolate the pump and other components in the pumping system from the electrical supply before pouring oil into the pump.

2. Do not mix hydrocarbon lubricants with PFPE or vice versa. If the oil is mixed, drain and refill with clean oil as described in Section 5.4.

Refer to Figure 1 for the items in brackets.

1. Check that the oil-level in the oil sight-glass (12) is between the MAX and MIN level marks on the bezel of the oil sight-glass.

2. If the oil-level is near to or below the MIN level mark, remove the oil filler-plug (1) and pour more oil into the reservoir until the oil reaches the MAX level mark. If the oil-level goes above the MAX mark, remove the oil drain-plug (11) and drain the excess oil from the pump. Refit the oil drain-plug. Refit the oil filler-plug.

3. If the oil is contaminated, drain and refill the pump with clean oil as described in Section 5.4.

5.4 Replace the oil

Refer to Figure 1 for the items in brackets.

1. Operate the pump for approximately ten minutes to warm the oil, then switch off the pump. (This lowers the viscosity of the oil and allows the oil to be drained from the pump more easily).

2. Isolate the pump from the electrical supply and disconnect it from the vacuum system.

3. Remove the oil filler-plug (1).

4. Place a suitable block under the pump-motor to tilt the pump and place a suitable container under the oil drain-plug (gravity drain) (11). Remove the oil drain-plug and allow the oil to drain into the container.

5. If the oil is dirty or contaminated:

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1. Inlet adaptor

2. O-ring

3. Circlip

4. Inlet-filter

 Refit the oil drain-plug and pour clean oil into the pump.  Reconnect the pump to the electrical su pply and operate the pump for about 5 to 10 minutes.  Disconnect the pump from the electrical supply, remove the oil drain-plug and allow the oil to drain out of

the pump.

 Repeat this step until the oil reservoir is clean.

6. Refit the oil drain-plug, remove the block and reconnect the pump to the vacuum system.

7. Fill a suitable container with clean oil and pour the oil into the filler hole until the oil-level reaches the MAX level mark on the bezel of the oil sight-glass (12).

8. Allow a few minutes for the oil to drain into the pump. If necessary, add more oil. Refit the oil filler-plug.

5.5 Inspect and clean the inlet-filter

Refer to Figure 8.

1. Unscrew the inlet adaptor (1) and remove the O-ring (2), circlip (3) and inlet-filter (4).

2. Wash the filter in a suitable cleaning solution. Allow the filter to dry.

Maintenance

3. Refit the inlet-filter (4), circlip (3), O-ring (2) and inlet adaptor (1).

Figure 8 - Remove/replace the inlet filter

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1. Filter element

2. Wire mesh

3. Retainer circlip

Maintenance

5.6 Clean the gas-ballast filter

Note: The gas-ballast filter may have been re moved to connect a gas supply or valve to the gas-ballast inlet.

Refer to Figure 9.

1. Remove the retainer circlip (3).

2. Remove the protective wire mesh (2) and filter elements (1).

3. Wash the wire mesh and filter in a suitable cleaning solution. Allow the wire mesh and filter to dry before replacing them in the pump.

4. Refit the wire mesh (2) and filter element (1) in the adaptor plate housing and retain with the retainer circlip (3).

Figure 9 - Remove/replace the gas-ballast filter

5.7 Clean the motor fan-cover and enclosure

If the motor fan-cover and enclosure are not kept clean, the air-flow over the motor can be restricted and the pump may overheat.

1. Switch off the pump and disconnect it from the electrical supply.

2. Use a dry cloth and a brush to remove dirt and deposits from the fan-cove r and enclosure.

5.8 Clean and overhaul the pump

Clean and overhaul the pump as described in the instructions supplied with the clean and overhaul kit (refer to Section 7.3).

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WARNING

5.9 Replace the run capacitor and test the motor

Change the run capacitor as per the maintenance plan.

Replace the run capacitor as described in the instructions supplied with the capacitor kit. Refer to Table 12,

Section 7.3.

Test the earth (ground) continuity and the insulation resistance of the pump-motor, in accordance with local regulations for periodic testing of electrical equipment. Edwards recommends that:

 The earth (ground) continuity is less than 0.1 .  Insulation resistance is greater than 10 M.

If the motor fails these tests, replace the motor.

5.10 Fit new blades

Fit new blades to the pump as described in the instructions supplied with the blade kit (refer to Section 7.3).

Maintenance

5.11 Fault finding

5.11.1 Introduction

A list of fault conditions and their possible causes is provided in the following sections to assist in basic fault-fi nding. If unable to rectify a fault when using this guide, call the supplier or the nearest Edwards Service Centre for advice.

5.11.2 The pump has failed to start

 The electrical supply fuse has failed.  The motor is incorrectly wired.  The operating voltage does not match that of the motor.  The exhaust filter or exhaust line is blocked.  The oil temperature is below 13°C.  The oil is too viscous.  The oil is contaminated.  The pump is seized after long storage, or has been left to stand after pumping contaminants.  The motor is faulty.

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Maintenance

5.11.3 The pump failed to achieve specified performance (failure to reach ultimate

vacuum)

 The measuring technique or gauge is unsuitable.  There is a leak in the external vacuum system.  The gas-ballast control is open.  The oil level is too low.  The pump is filled with the wrong type of oil.  The oil is contaminated.  The pump has not primed.  The vacuum fittings are dirty.  The inlet-filter is blocked.  The pump has not warmed up.  The motor shaft rotates in the wrong direction (three phase motors only).

5.11.4 The pump is noisy

 The motor fan-cover is damaged.  The coupling and fan assembly are poorly adjusted.  The motor coupling is loose.  The motor bearings are worn.  The oil is contaminated with solid particles.  One of the pump blades is sticking.

5.11.5 The pump surface temperature is above 100°C

 The ambient temperature is too high.  The cooling-air supply is insufficient or is too hot.  The cooling-air supply is blocked.  The electrical supply voltage is too high.  The exhaust filter or exhaust line is blocked.  The oil level is too low.  The pump is filled with the wrong type of oil.  The oil is contaminated.  The process gas is too hot, or the throughput is too high.

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5.11.6 The vacuum is not maintained after the pump is switched off

 The gas-ballast control is open.  O-ring(s) are damaged or missing.  The shaft seals have deteriorated.

5.11.7 The pumping speed is poor

 The connecting pipelines are too small in diameter.  The connecting pipelines are too long.  The inlet-filter is blocked.

5.11.8 There is an external oil leak

 The oil pump shaft seal is worn or damaged.  The oil box gasket has deteriorated.  There is an oil leak from gas-ballast control.

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Maintenance

 There is an oil-leak from the drain-plug.

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CAUTION

6 Storage and disposal

6.1 Storage

Observe the storage temperature limits stated in Section 2.1. Storage below these limits will permanently damage the pump seals.

Note: If storing a new pump in conditions of high humidity, remove the pump from its cardboard packaging box;

dispose of the box (refer to Section 6.2).

Use the following procedure to store the pump:

1. Shut-down the pump as described in Section 4.8.

2. Disconnect the pump from the electrical supply.

3. Purge the vacuum system and the pump with dry nitrogen and disconnect the pump from the vacuum system.

4. Replace the oil as described in Section 5.4.

Storage and disposal

5. Place and secure protective covers over the inlet and outlet-ports.

6. Store the pump in cool, dry conditions until required for use.

Note: When required, prepare and install the pump as described in Section 3. If the pump has been stored for

more than a year, clean and overhaul the pump before installation, as described in the instructions supplied with the clean and overhaul kit.

6.2 Disposal

Dispose of the pump, the oil and any components removed from the pump safely in accordance with all local and national safety and environmental requirements.

Particular care must be taken with components and waste oil which have been contaminated with dangerous process substances.

Do not incinerate fluoroelastomer seals and O-rings.

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7 Service, spares and accessories

7.1 Introduction

Edwards products, spares and accessories are available from Edwards companies in Belgium, Brazil, China, France, Germany, Israel, Italy, Japan, Korea, Singapore, United Kingdom, U.S.A and a world-wide network of distributors. The majority of 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, state for each part required:

 Model and Item Number of the equipment  Serial number  Item Number and description of part.

7.2 Service

Edwards products are supported by a world-wide network of Edwards Service Centres. Each Service Centre offers a wide range of options including: equipment decontamination; service exchange; repair; rebuild and testing to factory specifications. Equipment which has been serviced, repaired or rebuilt is returned with a full warranty.

Service, spares and accessories

Local Service Centres can also provide Edwards engineers to support on-site maintenance, service or repair of equipment.

For more information about service options, contact the nearest Service Centre or other Edwards company.

7.3 Spares

The maintenance kits listed in Table 11 contain all of the parts needed to maintain the pump. The maintena nce kits also include instructions for the use of the kits.

Use the Clean and Overhaul Kit for routine maintenance operations. Use the Blade Kit togeth er with the Clean and Overhaul Kit when renewing the blade assembly in the rotary pump.

Table 11 - Spares item numbers

Spare Item Number

Clean and Overhaul Kit (Hydrocarbon) A373-01-131 Clean and Overhaul Kit (PFPE filled) A373-01-136 Blade Kit A373-01-135 Ultragrade 19 Oil (4 litres) H110-25-013 Fomblin Grade 06/6 Oil H113-01-016

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Service, spares and accessories

Table 12 - Capacitor kits

Motor Part Number Capacitance Colour Item Number

A07110028 20µF White A50591813 A07110032 80µF Silver A50591800 A07110033 80µF Silver A50591800 A07110036 20µF White A50591813 A07110037 20µF White A50591813 A07110039 30µF White A50591814 A07110040 80µF Silver A50591800

7.4 Capacitor selection table

The following table can be used to select the correct capacitor kit if motor and/or pump part numbers are known.

Table 13 - Capacitor kit selection table

Pump Type Pump Part Number Motor Part number Capacitor Kit

E2M28 A37315903 A07110028 A50591813

A37315904 A07110033 A50591800 A37315981 A07110032 A50591800 A37316903 A07110036 A50591813 A37317984 A07110039 A50591814 A37319903 A07110037 A50591813 A37324904 A07110040 A50591800 A37324930 A07110028 A50591813 A37325903 A07110028 A50591813 A37325984 A07110039 A50591814

E2M30 A37415903 A07110028 A50591813

A37415904 A07110033 A50591800 A37415981 A07110032 A50591800 A37435903 A07110028 A50591813 N04091000 A07110028 A50591813

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7.5 Accessories

7.5.1 Introduction

A range of accessories is available for the E2M28 and E2M30 pumps, as shown in Figure 10. The accessories are briefly described in the following sections. Refer to Table 14 for the Item Numbers of these

accessories.

Table 14 - Accessory item numbers

Accessory Item Number

ITO20K Inlet Catchpot A441-10-000 ITF20K Inlet Dust Filter A442-15-000 ITD20K Inlet Desiccant Trap A445-10-000 ITC20K Inlet Chemical Trap A444-10-000 EMF30 Outlet Mist Filter A462-33-000 PV25EK Valve: 200/240 V, 1-phase, 50/60 Hz C413-01-000 PV25EK Valve: 110/127 V, 1-phase, 50/60 Hz C413-03-000 FL20K Foreline Trap A133-05-000 Vibration Isolators (pack of four) A248-01-412 ODE 1/4 Oil Drain Extension A505-03-000 Pump Inlet Adaptor C105-20-201 Flexible Bellows C105-11-670 Pump Outlet Adaptor C105-01-414 Gas Ballast Banjo Elbow Assembly A500-06-003 Gas Ballast Valve: 110 V, 50/60 Hz A500-06-984 Gas Ballast Valve: 240 V, 50/60 Hz A500-06-930

Service, spares and accessories

7.5.2 Inlet catchpot

The Inlet Catchpot traps any liquid droplets and prevents their entry into the pump.

7.5.3 Inlet dust filter

The Inlet Dust Filter protects the pump against abrasive dust.

7.5.4 Inlet desiccant trap

Use a Desiccant Trap when pumping limited quantities of water vapour at high pumping speeds to a low vapour pressure.

7.5.5 Inlet chemical trap

The Inlet Chemical Trap protects the pump against chemically active gases.

7.5.6 Outlet mist filter

The Outlet Mist Filter separates and traps oil drop lets in the pump outlet to prevent oil mist discharge. The Mist Filter is supplied with an adaptor to connect it to the pump outlet.

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1. Inlet catchpot

2. Inlet dust filter

3. Inlet desiccant trap

4. Inlet chemical trap

5. Gas ballast valve

6. Banjo/elbow assembly

7. Solenoid operated pipeline valve

8. Foreline trap

9. Outlet mist filter

10.NW25 adaptor

11.Vibration isolators

12.Oil drain extension

Figure 10 - Accessories

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7.5.7 Solenoid operated pipeline valve

Fit the Pipeline Valve between the vacuum system and the pump inlet to provide additional system protection when the pump is switched off.

7.5.8 Foreline trap

Use a Foreline Trap on a clean pumping system to prevent back-migrati on of rotary pump oi l vapour into t he vacuum system.

7.5.9 Vibration isolators

The Vibration Isolators reduce transmission vibration and noise when the pump is floor or frame mounted and help to reduce strain when the mounting area is uneven.

7.5.10 Oil drain extension

Fit the Oil Drain Extension between the oil drain port on the pump and the oil drain-plug to make the drainage of oil from the pump easier.

Service, spares and accessories

7.5.11 Pump inlet adaptor

This is an NW25 to 28 mm bore tube adaptor, supplied with connection hardware. Attach this adaptor to the NW25 pump-inlet to connect 28 mm bore plastic or rubber tube.

7.5.12 Flexible bellows

Use Flexible Bellows to connect the pump-inlet to the vacuum system. Edwards recommends using bellows when using Vibration Isolators.

7.5.13 Pump outlet adaptor

This is a 3/4 inch BSP to NW25 adaptor. Use this adaptor when removing the hose adaptor supplied fi tted to the pump outlet to adapt the 3/4 inch BSP thread to NW25 pump inlet.

7.5.14 Gas ballast banjo/elbow assembly

Use this 3/4 inch BSP assembly when a remote ballast supply, or gas ballast valve, is fitted.

7.5.15 Gas ballast valve

Use this to control the gas-ballast remotely. The Gas Ballast Banjo/Elbow Assembly (refer to Section 7.5.14) will also be required when fitting this accessory.

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CAUTION

WARNING

8 PFPE-prepared EM pumps

8.1 Introduction

When specifying a PFPE-prepared EM pump, the pump will be supplied prepared for use with Edwards PFPE mechanical pump oils, such as Fomblin 06/6 and Krytox 1506.

PFPE-prepared EM pumps are suitable for pumping high concentrations of oxygen. Edwards recommends referring to Edwards publication P400-40-100 (Vacuum Pump and Vacuum System Safety)

before installing and using a PFPE-prepared EM pump.

8.2 Installation

Never use hydrocarbon lubricants in a PFPE-prepared pump.

Installation of a PFPE-prepared EM pump is as specified in Section 3.

PFPE-prepared EM pumps

8.3 Operation

PFPE-prepared EM pumps are suitable for pumping high concentrations of oxygen, but Edwards recommends not using a PFPE-prepared EM pump for the pumping of hazardous materials.

Operation of a PFPE-prepared EM pump is as specified in Section 4.

8.4 Maintenance

Obey the safety instructions given below and take note of appropriate precautions. failure to follow instructions can cause injury to people and damage to equipment.

 Take additional care if it is possible that the pump or the PFPE oil has overheated.  Do not touch or inhale the thermal breakdown prod ucts of PFPE oil th at may be present if the pump has been

heated to 260°C and above. PFPE oils are safe in normal use but can decompose into very dangerous substances when heated to 260°C and above. The pump may have overheated if misused, malfunctioned or if it was in a fire. Material Safety Data Sheets for PFPE oils used in the pump are available on request: contact the supplier or Edwards.

Fomblin oil has different properties from other pump oils, therefore:

 If the PFPE-prepared EM pump is filled with Fomblin oil, Edwards recommends regularly checking for oil

leaks, particularly around the shaft seals.

 If an oil leak is detected, contact the supplier or Edwards for advice.

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Edwards PFPE, E2M28 Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

Illustrations

Tables

Associated publications

1Introduction

1.1 Scope and definitions

1.2 ATEX directive implications

1.3 Description

1.4 Gas-ballast

2Technical data

2.1 Operating and storage conditions

2.2 Performance

2.3 Mechanical data

2.4 Lubrication data

2.5 Electrical data

3 Installation

3.1 Safety

3.2 System design

3.3 Unpack and inspect

3.4 Locate the pump

3.5 Fill the pump with oil

3.6 Electrical installation: single-phase motors

3.6.1 Introduction

3.6.2 Standard single-phase motors

3.6.3 Amphenol version single-phase motors

3.6.4 110/200-240 V 50 Hz or 115-120/200-230 V 60 Hz single-phase motors

3.7 Electrical installation: three-phase motors

3.7.1 Connect the electrical supply to the motor

3.7.2 Check the direction of rotation

3.8 Connect the pump inlet

3.9 Connect the pump outlet

3.10 Gas-ballast inlet connection

3.11 Leak test the system

4 Operation

4.1 ATEX directive implications

4.1.1 Introduction

4.1.2 Flammable/pyrophoric materials

4.1.3 Gas purges

4.2 Gas-ballast control

4.3 Start-up

4.4 To achieve ultimate vacuum

4.5 To pump condensable vapours

4.6 To decontaminate the oil

4.7 Unattended operation

4.8 Shut-down

5Maintenance

5.1 Safety information

5.2 Maintenance plan

5.3 Check the oil-level

5.4 Replace the oil

5.5 Inspect and clean the inlet-filter

5.6 Clean the gas-ballast filter

5.7 Clean the motor fan-cover and enclosure

5.8 Clean and overhaul the pump

5.9 Replace the run capacitor and test the motor

5.10 Fit new blades

5.11 Fault finding

5.11.1 Introduction

5.11.2 The pump has failed to start

5.11.4 The pump is noisy

5.11.5 The pump surface temperature is above 100°C

5.11.6 The vacuum is not maintained after the pump is switched off

5.11.7 The pumping speed is poor

5.11.8 There is an external oil leak

6 Storage and disposal

6.1 Storage

6.2 Disposal

7 Service, spares and accessories

7.1 Introduction

7.2 Service

7.3 Spares

7.4 Capacitor selection table

7.5 Accessories

7.5.1 Introduction

7.5.2 Inlet catchpot

7.5.3 Inlet dust filter