Edwards Eh500 User manual

A301-51-880

Issue T Original

Instruction Manual

EH Mechanical Booster Pumps

Description Item Number

EH250 2.2kW Safe Area Pumps A301-51-945, A301-52-946

EH250 1.5kW Safe Area Pumps A301-51-935, A301-53-935, A301-52-936, A301-54-936

EH500 1.5kW Safe Area Pumps A302-73-935, A302-74-936

EH500IND 2.2kW Safe Area Pumps A302-71-945, A302-72-946

EH1200 3kW Safe Area Pumps A305-92-935, A305-93-936

EH1200IND 3kW Safe Area Pumps A305-90-935, A305-91-936

EH1200C 3 kW Flame Proof Pump A305-56-982

EH1200 T3/T160/T4 3kW Flame Proof Pump A305-57-900

EH2600 7.5kW Safe Area Pumps A307-51-935, A307-53-935, A307-52-936, A307-54-936

EH2600IND 11kW Safe Area Pumps A307-75-946, A307-76-982

EH2600C 11kW Flame Proof Pump A307-56-982

EH2600 T160/T4 11kW Flame Proof Pump A307-79-900

EH2600T3 11kW Flame Proof Pump A307-41-935

EH4200 7.5kW Safe Area Pumps A309-51-935, A309-53-935, A309-52-936

EH4200IND 11kW Safe Area Pumps A309-75-946, A309-76-982

EH4200C 11kW Flame Proof Pump A309-56-982

EH4200 T160/T4 11kW Flame Proof Pump A309-79-900

EH4200T3 11kW Flame Proof Pump A309-41-935

Edwards and the Edwards logo are trademarks of Edwards Limited.

Contents

A301-51-880 Issue T

Contents

Section Page

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

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

1.2 Description ................................................................................................................ 1

1.2.1 Overview .................................................................................................................. 1

1.2.2 General construction .................................................................................................... 5

1.2.3 Principle of operation ................................................................................................... 5

1.2.4 Hydrokinetic drive ....................................................................................................... 5

1.3 Chemical and ATEX compliant EH pumps ............................................................................ 5

1.3.1 Flameproof motors ...................................................................................................... 5

1.3.2 ATEX directive (94/9/EC): Europe only .............................................................................. 6

1.3.3 Temperature classification ............................................................................................. 6

1.3.4 Hydrokinetic drive/gearbox purge .................................................................................... 7

1.3.5 After-cooler ............................................................................................................... 7

1.3.6 Normal operation ........................................................................................................ 7

1.3.7 Abnormal operation ..................................................................................................... 8

1.3.8 Electrostatic charges .................................................................................................... 8

2 Technical Data ... ........................... ......................... .............. ............... 9

2.1 Operating and storage conditions ..................................................................................... 9

2.2 Critical backing pressure ............................................................................................... 9

2.3 Performance .............................................................................................................12

2.4 Mechanical data ......................................................................................................... 12

2.5 Electrical data ........................ ........................... .............................. ......................... . 13

2.6 Lubrication data ......... ........................... ........................... ........................... .............. 14

2.7 Hydrokinetic drive/ge arbox nitrogen supply (EH1200C, EH1200 T3/T160/T4X, EH2600C, EH2600 T3X,

EH2600 T160/T4X, EH4200C, EH4200 T3X, EH4200 T160/T 4X only) 14

2.8 Cooling-water data ............................. ........................................................................14

2.9 Noise and vibration data ... ........................... ......................... ........................... ............. 15

2.10 Connections ..............................................................................................................15

2.11 Materials of construction of components expos ed to pumped gases ...........................................16

2.12 Item Num bers ........................... ........................... ............................ ........................ . 16

3 Installation ....................................................................................... 25

3.1 Safety ..................................................................................................................... 25

3.2 System requirements ....................... ............................ ............................. ................... 25

3.3 Unpack and inspect ..................................................................................................... 26

3.4 Fill the pump with oil .................................................................................................. 27

3.4.1 Hydrokinetic drive/gearbox ........ .......................... ............................ ........................ ..... 27

3.4.2 Shaft-seal reservoir ..................................................................................................... 27

3.4.3 Gear-cover (all EH1200, E H2600 and EH4200 mo del pumps only) ............................................... 28

3.5 Cooling-water connections (all EH1200, EH2600 and EH4200 model pumps only) ............................ 29

3.6 Electrical connections .................................................................................................. 29

3.6.1 Electrical s upply c onfiguration .... ........................... ........................... ........................ ..... 29

3.6.2 Motor connections ...................................................................................................... 30

3.6.3 Connect the motor thermistors (chemical and ATEX co mpliant EH pumps only) ............................. 31

3.7 Check th e direction of pu mp rota tion ........... ........................... ........................... .............. 38

3.8 Connect the hydrokinetic drive/gearbox purge nitrogen supply

(chemical and ATEX compliant EH pumps only) 39

3.9 Connect the pump-inlet and outlet .................................................................................. 40

3.10 External evacuation of hydrokinetic drive/gearbox (optional) .................................................. 41

APT 11/07

A301-51-880 Issue T

Edwards and the Edwards logo are trademarks of Edwards Limited.

Contents

4 Operation ........................................................................................ 43

4.1 Operational safety ......................................................................................................43

4.2 Start-up procedure ..................................................................................................... 43

4.2.1 Pre-start checks ......................................................................................................... 43

4.2.2 Start-up ................................................................................................................. . 44

4.3 Shut-down ................................................................................................................ 44

5 Maintenance ..................................................................................... 45

5.1 Safety information ...................................................................................................... 45

5.2 Maintenance plan ............... ........................ ............................... ........................ ......... 46

5.3 Check th e oil-levels ..... ........................... ............................ ........................... ............. 46

5.4 Inspect the pump connections ............... ......................... ........................... ..................... 46

5.5 Change t he pump oil ........... ........................... ............................ ........................... ...... 47

5.6 Lubricate the rear-bearing (All EH250 and EH500 model pumps only) ......................................... 48

5.7 Overhaul the pump .....................................................................................................49

6 Storage and Disposal ........................................................................... 51

6.1 Storage .... ............................ .............................. ............................ ......................... 5 1

6.2 Disposal ................................ ............................... .................................. .................. 51

7 Service and Spares .............................................................................. 53

7.1 Introduction .............................................................................................................53

7.2 Service .................................................................................................................... 53

7.3 Spares ..................................................................................................................... 5 3

Illustrations

Figure Page

1 All EH250 and EH500 pump variants .................................................................................. 3

2 All EH1200, EH2600 and EH4200 pump variants ..................................................................... 4

3 EH250/EH250IND dimensions (mm)* ................................................................................. 17

4 EH500/EH500IND dimensions (mm)* ................................................................................. 18

5 EH1200/EH1200IND dimensions ( mm) .............................. ............................ ..................... 19

6 EH1200C/EH1200 T3/T160/T4 dimensions (mm) .................................................................. 20

7 EH2600/EH2600IND dimensions ( mm) ........................... .............................. ...................... 2 1

8 EH2600C/EH2600 T3/EH2600 T160/T4 dimensions (mm) . .......................... ..................... ......... 22

9 EH4200/EH4200IND dimensions ( mm) ........................... .............................. ...................... 2 3

10 EH4200C/EH4200 T3/EH4200 T160/T4 dimensions (mm) . .......................... ..................... ......... 24

11 Sight glasses ............................................................................................................. 28

12 Example control circuit ........................ ........................... ........................... .................. 32

13 Electrical supply configuration A ..................................................................................... 34

14 Electrical supply configuration B ..................................................................................... 34

15 Electrical supply configuration C ..................................................................................... 35

16 Electrical supply configuration D ..................................................................................... 35

17 Electrical supply configuration E ..................................................................................... 36

18 Electrical supply configuration F ..................................................................................... 36

19 Electrical supply configuration G ..................................................................................... 37

20 Electrical supply configuration H .....................................................................................37

21 Electrical supply configuration I ......................................................................................38

22 Flange loa ding lim its .................... ........................... ........................... ......................... 4 2

23 Lubricate the rear bearing (EH250, EH500 and EH500IND pumps only) ........................................ 49

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Contents

A301-51-880 Issue T

Tables

Table Page

1 Operating and storage conditions ..................................................................................... 9

2 Temperature classifications ............................................................................................ 9

3 Pressure ratio figures .................................................................................................. 10

4 DPS dry pump and EH mechanical boos ter pump combinations for T3 ............................ ............. 10

5 DPS dry pump and EH mechanical boos ter pump combin ations for T160 ......................................10

6 CPH dry pump and EH mechanical booster pump c ombinations for T160 ...................................... 11

7 CPH dry pump and EH mechanical booster pump combinations for T3 ........................................ 11

8 Performance data .... ............................. ......................... ........................... .................. 12

9 Mechanical data ......................................................................................................... 12

10 Electrical d ata ................................... ............................ ........................... ................. 13

11 Lubrication data ......... ........................... ............................ ........................... ............. 14

12 Hydrokenetic drive/gearbox purge nitrogen supply data ................. ........................... ............. 14

13 Cooling water supply data: EH pumps in non-ATEX systems ........................ ........................ ..... 14

14 Cooling-water supply data: EH pumps in ATEX systems ..........................................................15

15 Noise and vibration data ... ........................ ............................ ........................... ............. 15

16 Connections ..................................... .........................................................................15

17 Materials of construction ..............................................................................................16

18 Item nu mbers ............................. ........................... ........................... ........................ . 16

19 Motor cable-gland hole sizes .......................................................................................... 31

20 Electrical s upply c onnection configurations ........ .............................. ......................... ......... 33

21 Maintenance plan ............ .......................... ......................... ........................... ............. 45

22 Spare item numbers ................. ........................... ............................... ......................... 5 3

23 EH250 and EH500 spare parts ......................................................................................... 53

24 EH1200 spare parts .....................................................................................................54

25 EH2600 and EH4200 spare parts ...................................................................................... 54

Associated publications

Publication title Publication number

Vacuum pump and vacuum s ystem safety - chemical and industrial vacuum systems P400-40-100

ATEX Instruction Manual P600-60-200

This page has been intentionally left blank.

A301-51-880 Issue T

Page iv © Edwards Limited 2007. All righ ts reserved.

Edwards and the Edwards logo are trademarks of Edwards Limited.

Introduction

A301-51-880 Issue T

1 Introduction

1.1 Scope and definitions

This manual provides installation, operation and maintenance instructions for the following Edwards EH mechanical

booster pumps:

zSafe area EH me chanical booste r pumps:

EH250, EH250IND EH500, EH500IND, EH1200, EH1200IND, EH2600, EH2600IND, EH4200 and EH4200IND

zChemical EH mechanical booster pumps:

EH1200C, EH2600C, EH4200C

ATEX compliant EH mechanical booster pumps:

EH1200T3/T160/T4X, EH 2600T160/T4X, EH42000T3X, EH4200T160/T 4X

Where appropriate, the titles EH mechanical boos ter pump, safe area EH mechanical booster pump, ATEX compliant

EH mechanical booster pumps and chemical EH mechanical booster pump are abbreviated to EH pump, safe area EH

pump, ATEX compliant EH pump and chemical EH pump respectively in the remainder of this manual.

You must use your EH pump as specified in this manua l.

Read this manual before you install and operate your EH pump. Important safety information is highlighted as

WARNING and CAUTION instructions; you must obey these instructions. The use of WARNINGS and CAUTIONS is defined

below.

CAUTION

Cautions are given where failure to observe the instruction could result in damage to the equipment, as sociated

equipment and process.

The units used throughout this manual conform to the SI international system of units of measurement.

1.2 Description

1.2.1 Overview

The EH pumps are compact and have high pumping speeds. You must use the EH pump with a suitable backing pump.

The EH pumps can operate with a maximum continuous inlet pressure of 1000 mBar. You can achieve lower system

pressures by the u se of two or more EH pumps in series.

On all EH pumps, the hydrokinetic drive/gearbox is connected to the pump outlet by a pressure equalisation

passageway, and forms an integral part of the vacuum system. The connecting passageway has a filter which removes

debris and so prevents contamination of th e lubricating oil and bearings. For an even cleaner system, you can

evacuate the end-cover/gear co ver by connection of the evacuation port (Figure 1, item 5 or Figure 2, item 6) to the

pump-inlet or to an external vacuum pump.

The hydrocarbon safe area, ATEX compliant and chemical EH pumps use hydrocarbon oils, such as Edwards Ultragrade

20. Versions of the safe area EH pumps for us e with PFPE (perfluoropolyether) oils are also available for vacuum

systems in which oxygen or other reactive or corrosive gases are pumped. The EH pumps must not be used to pump

peroxides.

WARNING

Warnings are given where failure to observe the instruction coul d result in injury or death to

people.

A301-51-880 Issue T

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Introduction

All of the EH2600 and EH4200 model pumps have an after-cooler in the pump-outlet, to reduce the exhaust gas and

rotor temperature.

The safe area EH pumps are safe to handle non-flammable gases and vapours within the normal operating parameters

of the pumps, as defined in this manual.

The chemical, and ATEX compliant EH pumps, when used with suitable backing pumps, are designed to pump

flammable gases within the T (temperature) classification defined in th e pump description (see Section 1.3.3).

Note: All 60 Hz booster pumps are given a T3 temperature rating.

In order to comply with temperature classification requirements, a chemical, and ATEX compliant EH pump must be

connected to a backing pump that provides a backing pressure lower than the critical backing pressure and the

pressure ratio of the combination is lower than th e maximum stated in Table 3 or be used in a pumping system

recommended by Edwards: r efer to Section 1.3.3 and 2.2.

All of the EH pumps have ISO inlet-flange and outlet-flange connections.

Edwards and the Edwards logo are trademarks of Edwards Limited.

Introduction

A301-51-880 Issue T

Figure 1 - All EH250 and EH500 pump variants

1. Terminal-box

2. Shaft-seal reservoir vented oil filler-plug

3. Hydrokinetic drive/gearbox oil filler-plug

4. Inlet-flange

5. External evacuation point

6. End-cover

7. Rotors

8. Stator housing

9. Hydrokinetic drive/gearbox oil drain-plug (under the pump)

10. Direction of rotation sight-glass

11. Oil-level sight-glass (hyd rokinetic drive/gear box)

12. Oil-level sight-glass (shaf t-seal r eservoir)

A301-51-880 Issue T

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Introduction

Figure 2 - All EH1200, EH2600 and EH4200 pump variants

1. Terminal-box

2. Shaft-seal reservoir vented oil filler-plug

3. Cooling-water connection

4. Hydrokinetic drive/gearbox oil filler-plug *

5. Inlet-flange

6. External evacuation point

7. Gear-cover oil filler-plug

8. Cooling-water connection

9. Oil-level sight-glass (gear-cover)

10. Gear-cover oil drain-plug (under the pu mp)

11. Rotors

12. Stator housing

13. Hydrokinetic drive/gearbox oil drai n-plug

(under the pump)

14. Direction of rotation sight-glass †

15. Oil-level sight-glass (hydro kinetic drive/

gearbox)

16. Oil-level sight-glass (shaf t-seal re servoir)

17. Motor fa n cover

† EH1200 pumps only.

* Safe area EH pumps only. On the chemical,

and ATEX compliant EH pumps, this is a

combined hydrokinetic drive/gearbox oil

filler-plug and purge connector.

A. All EH2600 and EH4200 pumps

B. All EH1200 pumps

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Introduction

A301-51-880 Issue T

1.2.2 General construction

The EH pumps are positive displacement Roots vacuum pumps. The pump mechanism is driven by a three-phase

electric motor through a hydrokinetic drive (see Section 1.2.4).

The safe area EH pumps are all fitted with safe area motors. Th e chemical, and ATEX compliant EH pumps are all

fitted with flameproof motors (see Section 1.3.1). All of the motors are air-cooled.

The pump shafts and rotors are made of cast SG iron. The internal and external shaft-seals are made of

polytetrafluoroethylene (PTFE) or fluoro-elastomer.

The pump-bearings, gears and seals are lubricated by oil fed from reservoir s in the hydrokinetic drive/gearbox. A

series of seals stops the oil from reaching the vacuum side of the EH pump. The hydrokinetic drive/gearbox is

evacuated. You can inspect the oil-levels through sight-glasses which are fitted to the hydrokinetic drive/gearbox.

Oil-filler, oil-drainage and external e vacuation connections are provided on the hydrokinetic drive/gearbox.

The timing gears on all of the EH1200, EH2600 and EH4200 model pumps are lubricated by oil inside the gear-cover.

An oil-filler connection is provide d and you can inspect the oil-level through a sight-glass fitted to the gear-cove r.

1.2.3 Principle of operation

The EH pump is shown in Figure 1 and 2. The motor-shaft drive s one of the rotors through the hydrokinetic drive. The

1:1 gears inside the hydrokinetic drive/gearbox drive the second rotor in the opposite direction inside the stator

housing. A small, accurate ly gauged, clearance is maintained between the rotors and between each rotor and the

stator wall. This clearance allows the EH pump to operate at high speed without mechanical wear and without the

need for lubrication inside the swept volume.

1.2.4 Hydrokinetic drive

The hydrokinetic drive consists of a fluid-coupling which co nnects the electric-motor shaft to the rotor. This system

is configured so that when the gas-load is high, the rota tional speed of the rotors is reduced. As the gas-load

decreases, the rotors a ccelerate to full speed. This allows continuous operation of the EH pum p over the vacuum

range without the risk of overloading the motor and removes the need for bypass-valves and associated pipelines.

The fluid-coupling is v iscosity sensitive. The two versions of the EH pump (for hydrocarbon an d PFPE oils) have fluid-

coupling drives which are specifically designed for the type of oil used in the pump.

1.3 Chemical and ATEX compliant EH pumps

1.3.1 Flameproof motors

All of the EH1200C, EH1200 T3/T160/T4X, EH2600C, EH2600T3X, EH2600 T16 0/T4X, EH4200C, EH4200 T3X and

EH4200 T160/T4X:

zPumps suitable for 50 Hz operation are fitted with a flameproof motor approved to EEx d, Gas Group IIA, IIB,

Temperature Class T4.

zPumps suitable for 60 Hz ope ration are fitted with a flameproof motor approved to CSA, Division 1 area, Gas

Class I Group C & D, and Dust Class II Group F & G, Temperature Class T3C.

zIf you want to operate your pump in a IIC external environment you have to fit a IIC motor to your EH

mechanical booster.

A301-51-880 Issue T

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Introduction

1.3.2 ATEX directive (94/9/EC): Europe only

ATEX compliant EH pumps with an internal T3X or T160/T4X temperature classification (see Section 1.3.3) may be

used in an ATEX-compliant vacuum system only if the pumps are configured and used in accordance with the

requirements of this manual. For ATEX compliant systems using an EH booster pump in combination with a DPS dry

pump also the requireme nts of the ATEX instruction manual (see 'A ssociated publications' at the end of the Contents

list) must be met.

Note: An 'X' suffix to the EH booster ATEX classification indicates that there are special conditions for safe use of

the booster. For EH mechanical boos ters that have not been sold as part of a Edwards approved ATEX system

please give special attention to Secti on 2.2 and Table 2and 3.

ATEX compliant systems supplied by Edwards will be certified in accordance with the ATEX directive, and will be

identified by an A TEX system rating label.

If you want to fit an ATEX compliant EH pump with a T3X or T16 0/T4X temperature classification into your own ATEX

compliant vacuum system, you must install and operate the EH pu mp in accordance with the requirements of th is

instruction manual. Please pay special attention to Section 1.3.3 about the temperature classification of your EH

pump, Section 1.3.4 about the hydrokinetic gearbox purge, Sec tion 1.3.6 about the requirements of constructional

safety, Section 1.3.7 abnormal use, Section 2.2 about the critical backing pressure and the pressure ratio between

your EH mechanical booster pump and your backing pump and Section 2.8 about the minimum cooling water flow.

You must also carry out your own Safety Risk Assessment as part of your system certification in order to ensure that

your system is safe. If necessary, contact Edwards for certification advice.

ATEX compliant EH pumps with an inte rnal T3X or T160/T4X temperature classification are suitable for operation in

ATEX compliant systems rated as follows:

The notations used in th ese ratings are as follows:

Refer to Section 2 of this manual for the necessary EH pump operating conditions, and, if your booster is part of a

Edwards vacuum system, to the ATEX Instruction manual and to your system instruction manual for specific de tails

of the system.

Note: If the system rating has an "X" suffix, this indicates that there are special conditions for the safe use of your

system: refer to the ATEX Instruction M anual and to your system manual for details.

1.3.3 Temperature classification

The temperature classifications applied to the chemical and ATEX compliant EH pumps relate to the auto-ignition

temperature of flammable materials that can be pumped:

zThe EH1200, EH2600, EH4200 , ATEX compliant and chemical EH pumps that h ave a T3 classification are

suitable for pumping flammable materials that have an auto-ignition temperature greater than 200 oC.

II 2 G c IIB T3 or II 2 G c IIB T160/T4

specifies that the ATEX compliant EH pump can be used in a potentially explosive

atmosphere.

II Equipment group II

2G Equipment category 2 (gas)

cconstructional safety

IIB Suitable to pump gas group IIB

T3/T160/T4 Gas auto-ignition temperature: see Section 1.3.3 .

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Introduction

A301-51-880 Issue T

zThe EH1200, EH2600 and EH4200 ATEX compliant EH pumps that have a T160 temperature classification are

suitable for pumping flammable materials that have an auto-ignition temperature greater than 160 oC.

zThe EH1200, EH2600 and EH 4200 ATEX compliant pumps that have a T4 classification are suitable for

pumping flammable materials that have an auto-ignition temperature greater than 135 oC.

Refer to Section 2 of this manual for the necessary EH pump operating conditions, to the ATEX Instruction Manual,

and to your system manual for specific details of the system in which the EH pump is fitted.

1.3.4 Hydrokinetic drive/gearbox purge

A pipeline connector is provided on the oil filler of the hydrokinetic drive/gearbox of all of the chemical and ATEX

compliant EH pumps. You can connect a suitable pu rge gas supply to this connector, to provide for purge of the

hydrokinetic drive with nitrogen at positive pressure. This will purge the shaft-seals, and prevent the entry of

corrosive or toxic vapours into the hydrokinetic dr ive and gear-cov er.

A fixed restrictor in the con nector ensures that the correct amount of nitrogen is allowed to flow into the

hydrokinetic drive/gearbox.

1.3.5 After-cooler

On the EH2600C, EH2600T3X, EH2600T160/T4X, EH4200C, EH4200T3X, EH4200T160/T4X che mical and ATEX

compliant EH pumps, the nickel-plated after-cooler is resistant to corrosive vapours wh ich may condense on it during

pump operation (depending on the application).

1.3.6 Normal operation

The ATEX compliant EH pumps rely on the pump’s constructional safety for the safe pumping of flammable materials.

In normal operation, as defined by this manual, the ATEX compliant EH pumps are safe for the pumping of flammable

materials where there is no risk that the build-up of process deposits could reduce the operating clearances of the

pump mechanism, and so cause a potential ignition hazard.

Where there is no such risk, the ATEX compliant EH pumps c an be used to pump flamma ble materials from gas group

IIA, IIB and IIC within the normal parameter defined in this manual.

WARNING

When using the EH ATEX compliant boo ster in either a Edwards ATEX compliant system or in your

own certified ATEX vacuum pumping system you must ensure that the gearbox purge is conn ected

to your booster and the Nitrogen supply is guaranteed. Please refer to Section 2.7 for operating

conditions.

WARNING

The ATEX compliant EH pumps rely on the principle of constructional safety to pump flammable

gases and vapours safely. Process deposits (which could form due to condensation of process

vapours) do not normally occur in booster pumps. However, to conform with constructional safety

requirements, it is your responsibility to ensure that process deposits do not occur in the ATEX

compliant EH pump (see below).

WARNING

The ATEX compliant EH pumps rely on the principle of constructional safety to pump flammable

gases and vapours safely. Yo u must protect the ATEX compliant EH pump from the ingress o f

particles that could cause an ignition of flammable gas or vapour in the pump. If particle s could

enter the ATEX compliant EH pump during s ystem commissioning, you must fit a suitable inlet filter

or screen, which you should then remove before process operation (refer to Section 3.9).

A301-51-880 Issue T

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Introduction

1.3.7 Abnormal operation

zPumping gases with temperatures greater than the sy stem temperature classification (see Section 1.3.3).

zPumping hydrocarbon oxides.

zPumping pyrophoric gase s.

zPumping gases that tend to self-decompose, or that are chemically unstable.

zPumping peroxides or oxygen enriched atmospheres with ATEX certified pumps. For non-ATEX applications

PFPE versions of the pumps can be offered for oxygen enriched atmospheres and peroxides.

zUse of the chemical and ATEX compliant EH pump with materials which have auto-ignition temperatures

below the defined temperature rating of the chemical EH pump.

zPumping of, or us e of the ATEX compliant EH pump in the presence of, explos ive dust atmospheres.

zUse of the ATEX compliant EH pump in ambient co nditions other than those specified in Section 2.1.

1.3.8 Electrostatic charges

Pure gas doesn't create electrostatic charges. There is a da nger of electros tatic charges when the gas pumped

contains droplets or particles.

Always ensure that the pump is earthed so there is no danger of igniting flammable gases due to electrostatic

discharges.

WARNING

Misuse of the chemical and ATEX compliant EH pump as described below is strictly prohibited:

Edwards and the Edwards logo are trademarks of Edwards Limited.

Technical Data

A301-51-880 Issue T

2 Technical Data

2.1 Operating and storage conditions

Notes: 1. For operation between -20 ºC and 5 ºC, we recommend that the EH pump is operated continuously

except when shut-down is necessary for maintenance purposes. Note also the cooling-water

requirements given in Section 2.8.

2. Because of the flexibility of the hydrokinetic drives, there is a wide range of backing pumps which are

suitable for use with the EH Mechanical Booster pumps. However, note the res trictions for chemical and

ATEX compliant EH pump critic al backing pressure given in Section 2.2. If necessary, contact Edwards

for advice.

2.2 Critical backing pressure

If this critical backing pressure is exceeded, the pump rotors have to do additional compressive wor k against the

backing pressure, which can cause the rotor temperatu re to exceed the temperature classification limit s, as there is

no flow of cooling gas through the pump. The critical backin g pressure at zero flow is equivalent to the ultimate

pressure of the backing pump, when an isolation valve upstream of the ATEX compliant EH pump is closed.

The critical backing pres sure at zero flow for your EH booste r pump depends on the temperatur e classification (please

refer to Section 1.3.3 Temperature Classification) of the me chanical booster pump. The follo wing critical backing

pressures apply for different temperature classifications for standalone boosters which haven’t been sold as part of

an approved Edwards ATEX system:

If you want to use the EH booste r outside the critical backing pressure specified above, please contact Edwards for

advice.

Table 1 - Operating and storage conditio ns

Ambient operating temperature range

Ambient storage temperature range

Maximum ambient operating humidity

-20 to 40 ºC

-20 to 80 ºC

90% RH

Protection degree (as defined by IEC 529) IP44

Recommended backing pumps See Note above

WARNING

For ATEX compliant E H pumps, which have been sold to you on their own and not as part of an

approved Edwards ATEX system (which are fitted with flameproof motors), the o utlet pressure of

the ATEX compliant EH pump must not exceed the critical backing pressure at zero flow, as

specified below. If this critical pressure is exceeded, internal temperatures in the ATE X compliant

EH pump may exceed the temperature c lassification (refer to Section 1.3.3) and render it invalid.

This can result in an internal ignition of the pumped gases/vapours.

If you fit an isolation valve betwe en the ATEX compliant EH pump and the backing pump, you m ust

interlock the operation of the valve with the operation of the ATEX compliant EH pump, so that

closure of the valve results in shut-dow n of the ATEX compliant EH pump.

Table 2 - Temperature classifications

Temperature Classification Critical backing pressure [mbar]

T3 40

T160 30

T4 20

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Technical Data

In addition, the pres sure ratio between the EH mechanical booster pump and the backing pump has to be kept within

certain limits to ensure that the temperature limits are not exceeded.

The following general pressure ratio figures apply in relation to the temperature class of your vacuum pumping

system:

If you want to use your booster outside these limits, please contact Edwards for advice.

The following tabl es show possible combinat ions of Edwards EH mechan ical booster p ump with Edwards DPS Ch emical

Dry pump.These systems are Edwards approved ATEX systems.

Please note that the following tables refer to 50 Hz operation on ly.

For Edwards EH mechanical booster/ DPS dry pump combinations depending on temperature class of the system:

✔Do not require extra protection

* Consult Edwards for advice

✔Do not require extra protection

* Consult Edwards for advice

Table 3 - Pressure ratio figures

Pressure ratio at duty point Temperature class of vacuum system

3:1 T3

2.5: 1 T160

2:1 T4

Table 4 - DPS dry pump and EH mechanical booster pump combinations for T3

Booster Pump Dry Pump

DPS 80 DPS 160 DPS 250 DPS400

EH250 T3 ✔ ✔ ✔ ✔

EH500 T3 ✔ ✔ ✔ ✔

EH1200 T3 ✔ ✔ ✔ ✔

EH2600 T3 * * ✔ ✔

EH4200 T3 * * * ✔

Table 5 - DPS dry pump and EH mechanical booster pump com binations for T160

Booster Pump Dry Pump

DPS 80 DPS 160 DPS 250 DPS400

EH250 T160 ✔ ✔ ✔ ✔

EH500 T160 ✔ ✔ ✔ ✔

EH1200 T160 ✔ ✔ ✔ ✔

EH 2600 T160 * * ✔ ✔

EH 4200 T160 * * * ✔

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Technical Data

A301-51-880 Issue T

For EH mechanical booster/CPH dry pump combination depending on the temperature class of the system:

✔Do not require extra protection

* Consult Edwards for advice

✔Do not require extra protection

* Consult Edwards for advice

Table 6 - CPH dry pump and EH mechanical booster pump combination s for T160

Booster Pump

Dry Pump

CPH 250 CPH 400

50 Hz 60 Hz 50 Hz 60 Hz

EH1200 T160 ✔*✔*

EH2600 T160 ✔*✔*

EH4200 T160 * * ✔*

Table 7 - CPH dry pump and EH mechanical booster pum p combinations for T3

Booster Pump

Dry Pump

CPH 250 CPH 400

50 Hz 60 Hz 50 Hz 60 Hz

EH1200 T3 ✔✔✔✔

EH2600 T3 ✔✔✔✔

EH4200 T3 * * ✔ ✔

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Technical Data

2.3 Performance

2.4 Mechanical data

Table 8 - Performance data

Rotational speed:

50 Hz electrical supply

60 Hz electrical supply

0 to 2900 r min-1

0 to 3500 r min-1

Maximum outlet pressure (see Section 1 .2.4) 1000 mbar absolute, 1 x 10 5Pa

Pressure differential across EH pump (dete rmined by the h ydrokinetic drive):

Pump 50 Hz electrical supply 60 Hz electrical supply

EH250/EH250IND 0 to 180 mbar 0 to 1.8 x 104Pa 0 to 150 mbar 0 to 1.5 x 104Pa

EH500/EH500IND 0 to 110 mbar 0 to 1.1 x 104Pa 0 to 90 mbar 0 to 9 x 103Pa

EH1200/EH1200IND 0 to 90 mbar 0 to 0.9 x 104Pa 0 to 75 mbar

0 to 7.5 x 10

EH1200C - - 0 to 75 mbar

0 to 7.5 x 10

EH1200 T3/T160/T4X 0 to 76 mbar 0 to 7.6 x 103Pa - -

EH2600 0 to 80 mbar 0 to 8 x 103Pa 0 to 67 mbar 0 to 6.7 x 103Pa

EH2600IND 0 to 120 mbar 0 to 1.2 x 104Pa 0 to 67 mbar 0 to 6.7 x 103Pa

EH2600C - - 0 to 67 mbar 0 to 6.7 x 103Pa

EH2600 T3X 0 to 114 mbar 0 to 1.14 x 104Pa - -

EH2600 T160/T4X 0 to 75 mbar 0 to 7.5 x 10 3Pa - -

EH4200 0 to 60 mbar 0 to 6 x 103Pa 0 to 50 mbar 0 to 5 x 103Pa

EH4200IND 0 to 70 mbar 0 to 7 x 103Pa 0 to 50 mbar 0 to 5 x 103Pa

EH4200C - - 0 to 50 mbar 0 to 5 x 103Pa

EH4200 T3X 0 to 64 mbar 0 to 6.4 x 103Pa - -

EH4200 T160/T4X 0 to 52 mbar 0 to 5.2 x 10 3Pa - -

Table 9 - Mechanical data

Dimensions See Figure 3 to 10

Mass: EH250

EH250IND

EH500

EH500IND

61 kg

66 kg

69 kg

74 kg

EH1200

EH1200IND

EH1200C

EH1200 T3/T160/T4X

149 kg

170 kg

EH2600

EH2600IND

EH2600C

EH2600 T3X

EH2600 T160/T4X

308 kg

345 kg

415 kg

EH4200IND

EH4200C

EH4200 T3X

EH4200 T160/T4X

380 kg

425 kg

495 kg

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Technical Data

A301-51-880 Issue T

2.5 Electrical data

Note: The motors of EH 250, EH500 and EH500IND pumps are supplied c onfigured for ‘low voltage’ operation (230 V

and lower), the motors of all other pumps are supplied configured for ‘high voltage’ operation (380 V and

higher): refer to Section 3.6.

Table 10 - Electrical data

Electrical supply vo ltage

Number of phases

Voltage tolerance:

50 Hz electrical supply

60 Hz electrical supply

Full load current ratings

220/240/380/415 V, 50 Hz or 208/230/460 V, 60 Hz

± 10%

-2.5%, +5%

See below and refer to motor rating plate

Pump(s) 220 V

50 Hz

240 V

50 Hz

380 V

50 Hz

415 V

50 Hz

208 V

60 Hz

230 V

60 Hz

460 V

60 Hz

EH250

EH500

Full load (A)

Rating (kW)

6.3

1.5

5.8

1.5

3.7

1.5

3.4

1.5

6.1

1.5

5.5

1.5

2.8

1.5

EH250IND

EH500IND

Full load (A)

Rating (kW)

7.8

2.2

7.4

2.2

4.5

2.2

4.3

2.2

9.7

2.2

8.8

2.2

4.4

2.2

EH1200

EH1200IND

Full load (A)

Rating (kW)

11.1

3.0

10.2

3.0

6.4

3.0

5.9

3.0

11.9

3.0

10.7

3.0

5.4

3.0

EH1200C Full load (A)

Rating (kW)

5.0

3.0

EH1200 T3/T160/

T4X

Full load (A)

Rating (kW)

10.4

3.0

9.9

3.0

6.0

3.0

5.7

3.0

EH2600 Full load (A)

Rating (kW)

19.8

7.5

18.2

7.5

11.5

7.5

10.5

7.5

20.9

7.5

18.9

7.5

9.5

7.5

EH2600IND Full load (A)

Rating (kW)

21.5

11.0

20.7

11.0

34.8

11.0

17.4

11.0

EH2600C Full load (A)

Rating (kW)

36.3

11.0

18.1

11.0

EH2600 T3X

EH2600 T160/T4X

Full load (A)

Rating (kW)

20.8

11.0

19.5

11.0

EH4200 Full load (A)

Rating (kW)

19.8

7.5

18.2

17.5

11.5

7.5

10.5

7.5

20.9

7.5

18.9

7.5

9.5

7.5

EH4200IND Full load (A)

Rating (kW)

21.5

11.0

20.7

11.0

34.8

11.0

17.4

11.0

EH4200C Full load (A)

Rating (kW)

36.3

11.0

18.1

11.0

EH4200 T3X

EH4200 T160/T4X

Full load (A)

Rating (kW)

20.8

11.0

19.5

11.0

A301-51-880 Issue T

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Technical Data

2.6 Lubrication data

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

2.7 Hydrokinetic drive/gearbox nitrogen supply (EH1200C, EH1200

T3/T160/T4X, EH2600C, EH2600 T3X, EH2600 T160/T4X,

EH4200C, EH4200 T3X, EH4200 T160/T4X only)

2.8 Cooling-water data

Notes: 1. If any EH1200, EH2600 or EH4200 model pump is used in an ATEX system, the EH pump must be operated

with cooling-water. This is safety criti cal, and your system must incorporate a flow-switch (connected

to the cooling-water outlet) which monitors the flow rate of the cooling-water through the EH pump;

the flow-switch must be connected to your control system, which must be confi gured to shut down the

EH pump when the cooling-water flow through the EH pump is too low (see Table 14 for the minimum

cooling-water flo w rates). Refer to the ATEX instruction manual for fur ther details.

2. If any EH1200 model pump is not part of an ATEX sys tem, you can operate the EH pump con tinuously

without cooling-water if the inlet pressure is kept below 5 mbar (5 x 102Pa) and the pumpdown time is

no longer than 10 minutes.

Table 11 - Lubrication data

Recommended oil type

Hydrocarbon pumps

PFPE pumps

Ultragrade 20

Fomblin YVAC 16/6

Recommended grease type *

*For use with all EH250 and EH500 pumps

Fomblin AR555

Oil capacity: All EH250 All EH500 All EH1200

Gear-cover - - 1.25

Hydrokinetic drive/gearbox 1.5 1.5 2.4

Shaft-seal reservoir 0.125 0.125 0.125

All EH2600 All EH4200

Gear-cover 3.5 3.5

Hydrokinetic drive/gearbox 6.5 6.5

Shaft-seal reservoir 0.15 0.15

Table 12 - Hydrokenetic drive/gearbox purge nitrogen supply data

Regulated pressure 0.3 to 0.5 bar gauge, 3 x 104to 5 x 104Pa

Table 13 - Cooling water supply data: EH pum ps in non-ATEX systems

Recommended cooling-water flow

(with inlet temperature of 20 ºC)

EH1200 pumps

EH2600 pumps

EH4200 pumps

3 l min-1

6 l min-1

Recommended cooling-water supply pressure 2 to 6 bar gauge, 3 to 7 bar absolute,

3 x 105to 7 x 105Pa

Permissible temperature range 5 to 35 ºC

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Technical Data

A301-51-880 Issue T

2.9 Noise and vibration data

2.10 Connections

Table 14 - Cooling-water supply data: EH pumps in ATEX systems

Minimum cooling-water flow

(with inlet temperature of 20 ºC)

EH1200 T3/T160/T4X

EH2600 T3/EH2600 T160/T4X

EH4200 T3/EH4200 T160/T4X

2 l min-1

4 l min-1

Recommended cooling-wate r supply pressure 2 to 6 bar gauge, 3 to 7 bar absolute,

3 x 105to 7 x 105Pa

Permissible temperature range 5 to 35 ºC

Table 15 - Noise and vibration data

Vibration level < 1.8 mm s-1 r.m.s. in the range 10 to 1000 H z

Continuous A-weighted sound pressure level

measured at 1 metre from the EH pump:

EH250 EH500 EH1200 EH2600 EH4200

72 dB(A) 72 dB(A) 77 dB(A) 83 dB(A) 83 dB(A)

Table 16 - Connections

Cooling-water connections:

Inlet

Outlet

3/8inch BSP male

Hydrokinetic drive/gearbox purge connection *

Vacuum connections:

*Chemical and ATEX compliant pumps only.

1/4inch compression fitting

EH250 EH500 EH1200 EH2600 EH4200

Inlet ISO 63 ISO100 ISO160 ISO160 ISO250

Outlet ISO40 ISO63 ISO100 ISO 100 ISO100

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Technical Data

2.11 Materials of construction of components exposed to pumped

gases

2.12 Item Numbers

Table 17 - Materials of construction

Stator and headplates

Rotors

Hydrokinetic drive/gearbox cover

Housing ‘O’ rings

Hydrokinetic drive/gearbox shaft-seals

Internal pump shaft-seals

Hydrokinetic drive/gears cooling coils *

After-cooler and swept volume †

Headplate jointing c ompound

*All EH1200, EH2600 and EH4200 models.

†All EH2600 and EH4200 models.

Grey cast iron , grade 250 (BS1452)

SG iron, grade 420/12 (BS2789)

Aluminium LM25TF (BS1490)

Viton

PTFE (polytetrafluoroethylene)

Copper/brass

Nickel plated copper/brass

Loctite 518

Table 18 - Item numbers

Pump(s) Type*

*SA = Safe area, FP = Flameproof

220-240 V/380-415 V

3-phase, 50 Hz

208-230 V/460 V

3-phase, 60 Hz

Hydrocarbon PFPE Hydrocarbon PFPE

EH250

EH250IND

A301-51-945

A301-53-935

A301-52-946

A301-54-936

EH500

EH500IND

A302-71-945

A302-73-935

A302-72-946

A302-74-936

EH1200

EH1200IND

EH1200C

EH1200 T3/T160/T4X

A305-90-935

A305-57-900

A305-92-935

A305-91-936

A305-56-982 †

†460 V only

A305-93-936

EH2600

EH2600IND

EH2600C

EH2600 T3X

EH2600 T160/T4X

A307-75-946 ‡

A307-41-935 ‡

A307-79-900 ‡

‡380-415 V only

A307-53-935

A307-76-982 **

A307-56-982 **

** 230/460 V only

A307-54-936

EH4200

EH4200IND

EH4200C

EH4200 T3X

EH4200 T160/T4X

A309-75-946 ‡

A309-41-935 ‡

A309-79-900 ‡

A309-76-982 **

A309-56-982 **

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Technical Data

A301-51-880 Issue T

Figure 3 - EH250/EH250IND dimensions (mm)*

* The dimensions given in Figure 3 assume that Leroy is u sed for both the 1.5 and 2.2 KW motors.

1. Lifting-bolt

2. External evacuation port

EH250 EH250IND

A682 709

B270 270

C183 190

A301-51-880 Issue T

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Technical Data

Figure 4 - EH500/EH500IND dimensions (mm)*

* The dimensions given in Figure 4 assume that Leroy is u sed for both the 1.5 and 2.2 KW motors.

1. Lifting-bolts

2. External evacuation port

EH500 EH500IND

A770 797

B234 252

C183 190

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Technical Data

A301-51-880 Issue T

Figure 5 - EH1200/EH1200IND dimensions (mm)

1. Lifting-bolts

A301-51-880 Issue T

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Technical Data

Figure 6 - EH1200C/EH1200 T3/T160/T4 dimensions (mm)

1. Lifting-bolts

EH1200C 250

EH1200 T3/T160/T4 208

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Technical Data

A301-51-880 Issue T

Figure 7 - EH2600/EH2600IND dimensions (mm)

1. Lifting-bolts

EH2600 EH2600IND

A1200 1248

B120 220

C470 523

D260 311

E200 240

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Technical Data

Figure 8 - EH2600C/EH2600 T3/EH2600 T160/T4 dimensions (mm )

1. Lifting-bolts

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Technical Data

A301-51-880 Issue T

Figure 9 - EH4200/EH4200IND dimensions (mm)

1. Lifting-bolts

EH4200 EH4200IND

A1380 1428

B120 220

C470 523

D260 311

E200 240

A301-51-880 Issue T

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Technical Data

Figure 10 - EH4200C/EH4200 T3/EH4200 T160/T4 dimensions (mm )

1. Lifting-bolts

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Installation

A301-51-880 Issue T

3 Installation

3.1 Safety

zA suitably trained and supervised technician must install your EH pump.

zEnsure that the installation technician is fam iliar with the safety procedures which relate to the products

pumped. Wear the appropriate safety-clothing when yo u come into contact with contaminated components.

Dismantle and clean contaminated componen ts inside a fume-cupboard.

Consult Edwards publication P400-40-100

(Vacuum pump and vacuum system safety - chemical and industrial

systems) before you install and use the EH pump to process haza rdous or flammable materials.

zVent and purge the pumping system before you start install ation work.

zCheck that all the required components are available and of the correct type before you start work.

zEnsure that debris does not get into the EH pump when you install it.

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

operated accidentally.

zDo not reuse ‘O’ rings and Co-Seals.

zEnsure that the cooling-air flow through the pump-motor cooling-fa n cannot be obstructed.

zEnsure that all el ectrical cables, nitrogen pipeline s and cooling-water pipelines are safely positioned,

secured and routed, so that th ey do not present a trip hazard.

zProvide adequate access to all pump servicing points and oil-level sight-glasses.

zLeak-test the system after installation work is complete and seal any leaks found to prevent leakage of

hazardous substances out of the system and leakage of air into the system.

3.2 System requirements

Consider the following points when you design your pumping system:

zYou must use a suitable backing pump: refer to Section 2.1 and 2.2.

zThe EH pump mus t be mounted on a firm, level surface.

zVacuum pipelines must be adequately supported to stop the transmission of stress to pipeline joints.

zIf necessary, incorporate flexible pipelines in your system pipelines to reduce the transm ission of vibration

and to prevent loading of th e coupling joints. If yo u use flexible pipelines, you must ensure that you use

flexible pipelines which have a maximum pressure rating which is greater than the highest pressure that can

be generated in your system.

zYou must limit the temperature of the inlet gas to be no greater than the temperature classification of the

system (if applicable).

zEnsure that your design incorporates all appropriate safety precautions if toxic, inflammable or explosive

gases or particulates will be pumped.

WARNING

Obey the safety in structions listed below and take note of appropriate precautions. If you do not,

you can cause injury to people and damage to equipment.

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Installation

zYou must be able to purge with an inert gas when you shut down the pumping system to dilute dangerous

gases to safe concentrations. Cons ult Edwards or your supplier if you are in doubt.

If the EH pump is to be fitted in a new system, ensure that all preliminary pipelines have been installed and that a

suitable base for the EH pump has been prepared before you start installation.

Check that the following services and fac ilities are available for connection to the EH pump:

zCooling-water supply and return

zHydrokinetic drive/gearbox purge nitrogen supply (chemical and ATEX compliant EH pumps only)

zElectrical supply

zExhaust-extraction system

zInlet-screen (if required, to preven t the ingress of debris during commissioning): refer to Section 1.3.6

3.3 Unpack and inspect

Use the following procedure to unpack and inspect the EH pump:

1. Place the pallet in a convenient position with a fork lift truck or a pallet truck.

2. Remove all packing materials.

3. Use suitable lifting-gear to remove the EH pump from its pa llet:

zOn all pumps, attach the lifting-ge ar to the centre pair of lifting-bolts (Figure 1 to 10, item 1) on the EH

pump.

zAll of the EH2600 mode l pumps and EH4200C, EH4200 T3X and EH4200 T160/T4X pumps have centres of ma ss

which are offset towards the motor. On these pumps, you must fit an additional support strap to the motor

(behind the lifting-bolt) to support the pump, and prevent it from tilting when you lift it.

Do not try to lift the EH pump by hand (see Section 2.4 for the mass of your EH pump).

4. Remove all protective covers and inspect the EH pump. If the EH pump is damaged, notify your supplie r and the

carrier in writing within three days; state the Item Number of the EH pump together with your order number and

your supplier’s invoice number. Retain all packing materials for inspection. Do not us e the EH pump if it is

damaged.

5. If the EH pump is not to be used immediately, refit the protective c overs. Store the EH pu mp in suitable

conditions as described in Section 6.1.

WARNING

Use suitable lifting equipment to move the EH pump, in accordance with the method described

below. If you do not, you can injure yourself or damage the EH pump. Refer to Section 2.4 for the

mass of the EH pump.

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Installation

A301-51-880 Issue T

3.4 Fill the pump with oil

3.4.1 Hydrokinetic drive/gearbox

We recommend that the hydrokinetic drive/gearbox oil-level is mainta ined at the recommended oil-level shown in

Figure 11, item 5; if the oil-level is above or below the recommended oil-level, th e performance of the EH pump may

be affected.

Do not allow the oil-level to fall below the bottom of the refle ctor plate (Figure 11, item 4) or the EH pump may be

damaged.

1. Remove the hydrokinetic drive/gearbox oil filler-plug ( Figure 1, item 3).

2. Refer to Figure 11. Fill the hydrokinetic drive/gearbox with the rec ommended type of oil until th e oil-level

reaches the recommended oil-level (5) at the top of the reflector plate (4) in the oil-level sight-glass (3).

3. Refit the hydrokinetic drive/gearbox oil filler-plug.

3.4.2 Shaft-seal reservoir

We recommend that you fill the shaft-seal reservoir so that the oil-level is at the recommended oil-level, shown in

Figure 11, item 2.

You can operate the EH pump as long as the oil-level is above the bottom of the reflector plate. Do not allow the

shaft-seal oil-level to fall below the bottom of the reflector plate or the EH pump may be damaged. Yo u must use

the same oil you u sed to fill the hydrokinetic drive/gearbox.

1. Remove the shaft-seal reservoir vented oil filler-plug (Figure 1 and 2, item 2).

2. Refer to Figure 11. Fill the shaft-seal reservoir with oil until the oil-level is at the recommended oil-level (2) at

the top of the reflector plate (6).

3. Refit the vented oil filler-plug.

WARNING

Changing the oil in an EH pump from h ydrocarbon to PFPE (Fomblin) could potentially cause a

safety hazard. Fomblin EH pumps are generally used in hazardous applications which may involve

the pumping of gase s with high conce ntrations of oxygen. If hydrocarbon oil comes into contact

with gases with an oxygen concentration greater than 25%, an explosion can occur.

Therefore, if you want to convert an EH pump that has been used with hydrocarbon oil to use PFPE

(Fomblin) oil, you cannot s imply flush the EH pump with new PFPE oil. You m ust return the EH

pump to a Edwards Se rvice Centre for overhaul and cleaning by qualified Edwards service

engineers. The change in oil type requires a complete strip down of the EH pump, and thorough

cleaning of all parts, so that all traces of hydrocarbon oi l are removed.

WARNING

Ensure that the correct grade of oil is used and that the oil-levels in the EH pump are corre ct. If

an incorrect oil is used or if an oil-level is incorrect, EH pump performance may be affected and

the EH pump may be damaged, which will compromise its constructional safety.

WARNING

Ensure that the correct vented filler-plug is refitted in the shaft-seal reservoir. If you use a non-

vented plug, the reservoir will be pressurised and the oil sight-glass may fracture.

A301-51-880 Issue T

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Installation

Figure 11 - Sight glasses

3.4.3 Gear-cover (all EH1200, EH2600 and EH4200 model pumps only)

Use the following procedure to fill the gear-cover on all EH1200, EH2600 and EH4200 pumps.

You must fill the gear-cover with the same oil you used to fill the hydrokinetic drive/gearbox and shaft-seal reservoir.

1. Remove the oil filler-plug on the top of the gear-cover (Figure 2 , item 7).

2. Fill the gear-cover with oil until the oil-level is at the middle of the reflector plate in the gear-c over oil-level

sight-glass (Figure 2, item 9).

3. Refit the oil filler-plug.

1. Shaft-seal reservoir sight-glass

2. Shaft seal reservoir recommended oil-level

3. Hydrokenetic drive/gearbox sight-glass

4. Hydrokenetic drive/gearbox r eflector plate

5. Hydrokenetic drive/gearbox recommended

oil-level

6. Shaft-seal refle ctor plate

7. Direction of rotation sight-glass* (the arrow

shows the correct direction)

* Not fitted to EH2600/2600IND/2600C/2600

T3/2600 T160 and EH4200/4200IND/4200C/

4200 T3/4200 T160 pumps

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Installation

A301-51-880 Issue T

3.5 Cooling-water connections (all EH1200, EH2600 and EH4200

model pumps only)

Note: Refer to Section 2.8 for the cooling-water requirements. Note that there are minimum flow rate and flow-

switch requirements specified for ATEX compliant EH pumps operated in ATEX certified systems.

Connect the cooling-water supply and return lines to the 3/8inch BSP connectors. O ne connector is on the rear of

the hydrokinetic drive/gearbox, the other connector is on the underside of the ge ar-cover. You can connect the

supply and return lines to either of the connectors; the direction of cooling-water flow is not important.

Refer to Section 2.8 for the minimum cooling-water flow rate required. If the danger of the condensation of gase s in

the booster is not process critical, always connect the supply line to the gearbox cover first.

3.6 Electrical connections

3.6.1 Electrical supply configuration

The motors of the EH250, EH500 and EH500IND pumps are supplied configured for ‘low-voltage’ operation (240 V and

lower).

The motors of all other EH pumps are supplied configured for ‘high-voltage’ operation (380 V and higher). The one

exception to this is the Leroy 11 kW, 50 Hz motor, wh ich is configured for ‘low voltage’ as this is 380-415 V.

Refer to the wiring ins tructions provided with the pump motor. Configure your electrical con nections according to

the manufacturers in structions. If in doubt refer t o Table 20.

Refer to Table 20 before you connect the electrical supply to the pump motor (as described in Section 3.6.2).

Table 20 defines which figure you must refer to for the electrical connections for your pump/electrical supply.

WARNING

Ensure that the electrical installation of the EH pump conforms with your local and national safety

requirements. It must be connected to a suitably rated (refer to Section 2.5) fused and protected

electrical supply and a suitable earth (ground) point.

WARNING

If a chemical or ATEX compliant E H pump is used in a potentially explosive atmosphere or is used

to pump a potentially explosive atmosphere, the pump must be pow ered by an electrical supply at

the rated frequency of the pump motor. If it is not, you may invalidate any ATEX certification of

the pump, and the motor may overheat which could create an ignition hazard.

If you want to use a variable speed drive to operate the pump motor, contact Edwards for advice.

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Installation

3.6.2 Motor connections

CAUTION

The motor must be c orrectly configured and you mu st make the correct electrical conn ections for your electrical

supply. If you do not, you can damage the m otor.

Connect the supply through a contactor which has overload-protection or use a controller which incorporates a

contactor.

You must use a contactor which has a manual reset con trol. If you do not, the EH pump could automatically restart

after an electrical overload or an electrical supply failure.

You must use a suitable multi-wire cable and a suitable cable -gland (see Step 4 below) to connect your electrical

supply to the pump motor.

Connect the motor to the electrical supply as described in the following procedure.

1. Remove the motor terminal-box cover (Figure 1 and 2, item 1).

2. Check your electrical supply voltage and frequency. If necessary, configure the motor (that is, the terminal wires

and any links) to operate with your supply voltage: refer to the wiring instructions supplied with the pump

motor, or if in doubt the appropriate Figure specified in Table 20.

3. Remove the plug from the cable-entry hole that you will use for the electrical supply cable. Choose the most

suitable hole for your application.

4. Fit a suitable cable-gland to the cable-entry hole. The cable-gland (and adaptor, if fitted) must provide a

protective seal to IP44 (or higher), as defined by IEC 529. Refer to Table 19 for the cable-gland hole sizes.

5. Pass the electrical supply cable through the cable-gland.

WARNING

On all chemical and ATEX compliant EH pumps, you must use a suitable flameproof cable-gland to

connect the electrical supply cable to the pump-motor terminal-box. If you do not, the installation

may invalidate the certification of the system if the pump is used in an ATE X system.

WARNING

You must provide sui table strain relief on the electrical supply cable. If you do not, the cable (or

wires in the cable) may become disconnected from the pump and there may a risk of injury or

death by electric sho ck.

WARNING

Connect the electrical supply to the motor through a contactor which has a manual reset control.

WARNING

Connect the electrical supply to the motor s o that it is automatically switched off if the backing

pump stops. If you do not, the EH pump may overheat if it continues to operate when the backing

pump is stopped.

WARNING

You must be able to isolate an d lock out the electrical supply from the EH pump.

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Installation

A301-51-880 Issue T

6. Connect the wires of the cable to the appropriate terminals, as shown in the wiring instructions supplied with

the pump motor, o r if in doubt the appropriate Figure specified in Table 20.

7. Tighten the cable-gland.

8. If you have a chemical or ATEX compliant EH pu mp, continue at Section 3.6.3 to connect the motor thermistors,

otherwise refit the terminal-box cover to the motor.

3.6.3 Connect the motor thermistors (chemical and ATEX compliant EH pumps only)

The flameproof motors on all chemical and ATEX c ompliant EH pumps incorporate thermistors.

You must connect the thermistor terminals in the motor to a suitable control circuit, to shut down the EH pump

system if the motor temperature is too h igh. An example c ontrol circuit is shown in Figure 12.

You must use a suitable two-wire cable and a suitable cable-gland (see Step 2) to connect the thermistors cable (from

your control circuit) to the thermistor terminals in the motor.

Use the following procedure to connect the thermistor terminals to the control cir cuit.

1. Remove the plug from the cable-entry hole that you will use for the thermistors cable. (If there is more than one

cable-entry hole, choose the most suitable hole for your application.)

2. Fit a suitable cable-gland to the cable-entry hole. The cable-gland (and adaptor, if fitted) must provide a

protective seal to IP44 (or higher), as defined by IEC 529. Refer to Table 19 for the cable-gland hole sizes.

3. Pass the thermistors cable through the cable-gland.

4. Connect the two wires of the cable to the appropriate terminals, as shown in Figure 13 to 21 (refer to Table 20).

5. Tighten the cable-gland.

6. Refit the terminal-box cove r to the motor.

7. Connect the thermistor wires to your control circuit.

Table 19 - Motor cable-gland hole sizes

Pump type Motor frame size *

*As shown on the motor label.

Electrical supply cable-

gland hole size (ISO)

Thermistors cable-gland

hole size (ISO)

Safe area EH pumps 90, 100 20 -

132 25 -

160 32 -

Chemical EH pumps and ATEX

compliant

100 20 20

160 32 20

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Installation

Figure 12 - Example control circuit

1. Electrical supply isolator

2. +ve control side

3. Thermistor relay

4. Stop switch

5. Start switch

6. Fault indicator lamp

7. Pump contactor

8. 0 V control side

9. Pump motor

10. Contactor

11. Circuit breaker

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Installation

A301-51-880 Issue T

Table 20 - Electrical supply c onnection configurations

Motor

supplier

Motor Item

Number

Motor voltage (V)

(connection)

Motor

power *

Frequency

(Hz) Configuration Refer to

Figure

Leroy

A071-12-004 460 1.5 kW 60 A 13

A071-13-076 2.2 kW

A071-12-004 208-230 1.5 kW 60 B 14

A071-13-076 2.2 kW

Brook

A071-12-003

380-415

1.5 kW

50 C 15

A071-14-001 3 kW

A071-12-024 1.5 kW

A071-14-020 3 kW

Leroy A071-13-075 2.2 kW

A071-14-006 3 kW

Brook

A071-12-003

220-240

1.5 kW

50 D 16

A071-14-001 3 kW

A071-12-024 1.5 kW

A071-14-020 3 kW

Leroy A071-13-075 2.2 kW

A071-14-006 3 kW

WEG A071-18-017 380-415 (delta) 11 kW 50 D 16

Leroy A071-18-015 380-415 (delta) 11 kW 50 D 16

Brook

A071-18-021 380-415

(direct delta start)

11 kW 50 D 16

A071-18-015 11 kW

A071-12-004 460

(star)

1.5 kW 60 E 17

A071-12-025 1.5 kW

A071-12-004 208-230

(double star)

1.5 kW 60 F 18

A071-12-025 1.5 kW

A071-14-012 460 4 h.p. 60 G 19

WEG A071-18-019 460 (delta) 11 kW 60 E 17

A071-18-019 230 (double delta) 11 kW 60 H 20

Brook

A071-14-002

460

(delta)

4 h.p.

60 E 17

A071-14-021 4 h.p.

A071-18-016 15 h.p.

A071-18-022 15 h.p.

A071-17-002 10 h.p.

A071-17-029 10 h.p.

A071-14-002

208-230

(double delta)

4 h.p.

60 I 21

A071-14-021 4 h.p.

A071-17-002 10 h.p.

A071-17-029 10 h.p.

A071-18-016 230

(double delta)

15 h.p. 60 I 21

A071-18-022 15 h.p.

*As shown on the label on the motor.

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Installation

Figure 13 - Electric al supply configuration A

Figure 14 - Electrical supply configuration B

Note: The thermistor terminals may

be annotated "T1" and "T2"

instead of "P1" and "P2".

1. Thermistors cable

2. Cable-gland

3. Terminal/wire markings

4. Cable-gland

5. Electrical supply cable

6. To control circuit

Note: The thermisto r terminals may

be annotated "T1" and "T2"

instead of "P1" and "P2".

1. Thermistors cable

2. Cable-gland

3. Links

4. Terminal/wire markings

5. Cable-gland

6. Electrical supply cable

7. To control circuit

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Installation

A301-51-880 Issue T

Figure 15 - Electrical supply configuration C

Figure 16 - Electrical supply configuration D

Note: The therm istor terminals may

be annotated "T1" a nd "T2"

instead of "P1" and "P2".

1. Thermistors cable

2. Cable-gland

3. Links

4. Terminal/wire markings

5. Cable-gland

6. Electrical supply cable

7. To control circuit

1. Thermistors cable

2. Cable-gland

3. Links

4. Terminal/wire markings

5. Cable-gland

Note: The thermisto r terminals may

be annotated "T1" and "T2"

instead of "P1" and "P2".

6. Electrical supply cable

7. To control circuit

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Installation

Figure 17 - Electrical supply configuration E

Figure 18 - Electrical supply configuration F

1. Thermistors cable

2. Cable-gland

3. Terminal/wire markings

4. Cable-gland

5. Electrical supply cable

6. To control circuit

Note: The thermisto r terminals may

be annotated "T1" and "T2"

instead of "P1" and "P2".

Winding wires may be

numbered without letters.

1. Thermistors cable

2. Cable-gland

3. Links

4. Terminal/wire markings

5. Cable-gland

6. Electrical su pply cable

7. To control circuit

Note: The thermistor terminals may

be annotated "T1" and "T2"

instead of "P1" and "P2".

Winding wires may be

numbered without letters.

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Installation

A301-51-880 Issue T

Figure 19 - Electrical supply configuration G

Figure 20 - Electric al supply configuration H

1. Thermisto rs cable

2. Cable-gland

3. Terminal/wire markings

4. Cable-gland

5. Electrical supply cable

6. To control circuit

1. Thermistors cable

2. Cable-gland

3. Links

4. Terminal/wire markings

5. Cable-gland

6. Electrical supply cable

7. To control circuit

Note: The thermistor terminals may

be annotated "T1" and "T2"

instead of "P1" and "P 2".

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Installation

Figure 21 - Electrical supply configuration I

3.7 Check the direction of pump rotation

It is possible for the three-phase electrical supply to the motor to be phased incorrectly. If the supply is phased

incorrectly, the rotors will rotate in the reverse direction or remain stationary. Check the direction of rotation as

described below.

1. Check that the EH pump is connected to the vacuum system or that the inlet is blanked off.

2. Connect the backing pump and switch the backing pump on.

3. On all of the EH2600 and EH4200 model pumps, the correct direction of rotation is indicated by an arrow on the

motor fan cover (Figure 2, item 17). To determine the direction of rotation: watch the motor fan inside the fan

cover, switch on the EH pump for two or three seconds, then switch the EH pump off.

On all of the EH250, EH500 and EH1200 model pumps, you can use the method above to determine the direction

of rotation. Alternatively, the direction of rotation is also indicated by an arrow next to the direction of rotation

sight-glass (Figure 1, item 10 and Figure 2, item 14): watch the motor-coupling in the sight-glass (Figure 11,

item 7), switch on the EH pump for two or three seconds, then switch the EH pump off.

4. Check that the direction of rotation of the coupling noted in Step 3 was the same as that indicated by the

rotation arrow on the motor or on the direction of rotation sight-glass. If the direction of rotation was correct,

continue at Section 3.8.

WARNING

Blank the inlet or connect the EH pump to the vacuum system before you check the direction of

pump rotation. If you do not, there is danger of objects being trapped in the rotating rotors.

1. Thermistors cable

2. Cable-gland

3. Links

4. Terminal/wire markings

5. Cable-gland

6. Electrical supply cable

7. To control circuit

Note: The thermisto r terminals may

be annotated "T1" and "T2"

instead of "P1" and "P2".

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Installation

A301-51-880 Issue T

5. If the direction of rotation of the coupling was incorrect:

zSwitch off the backing pump and vent the system; iso late the EH pump from the electrical supply; reverse

any two of the phase-wires in the motor terminal-box.

zRepeat the check from Step 2 to ensure that the direction of rotation is now correct.

3.8 Connect the hydrokinetic drive/gearbox purge nitrogen supply

(chemical and ATEX compliant EH pumps only)

Use a rigid metal (such as stainless steel) pipeline with a n outside diameter of 1/4inch for your nitrogen supply.

We recommend that y ou install an automatically oper ated isolation-valve in your nitrogen s upply pipeline, configured

so that:

zThe hydrokinetic drive/gearbox purge nitrogen supply is on whenever the chemical or ATEX compliant EH

pump is on.

zThe hydrokinetic drive /gearbox purge nitro gen supply is off whenever the chemic al or ATEX compliant EH

pump is off.

If your system incorporates an isolation valve between the chemical or ATEX compliant EH pump and the backing

pump, you must configure your system so that the purge nitrogen supply is switched off whenever the isolation valve

is closed. If you do not, and the purge supply is left on when the isolation valve is closed, the system upstream of the

isolation valve will become pressurise d.

Refer to Figure 2 and use the following procedure to connect your purge nitrogen supply:

1. Remove the 1/4inch blanking plug from the hydrokinetic drive/gearbox oil filler-plug and purge connector

(Figure 2 item 4).

2. Fit a suitable 1/4inch compression fitting

connector to the purge connector.

3. Fit your nitrogen supply pipeline into the compression fitting a nd tighten to s ecure the connection.

WARNING

Your nitrogen supply pressure must comply with the re quirements of Section 2.7. If it does not,

the purge pipelines may become over-pressurised and may e xplode.

WARNING

If your system incorporates an isolation valve between the chemical EH pump and your backing

pump, ensure that the purge nitrogen supply is switched off when the isolation valve is closed.

WARNING

If your booster pump is part of an ATEX system you have to connect the gearbox purge and

guarantee the Nitrogen supply.

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Installation

3.9 Connect the pump-inlet and outlet

You must connect the inlet of the EH pump to your vacuum system, and conne ct the outlet of the EH pump to your

backing pump and exhaust-extraction/abatemen t systems, as required.

Pump-inlet and outlet connections are made with standard ISO flanges, Edwards tr apped ‘O’ rings and (on th e EH250

pumps only) a Edwards Co-Seal.

All of the EH2600 and EH4200 model pumps have two alternative outlet pos itions: on the u nderside of the EH pump,

and at the side of the EH pump.

As supplied, these EH pumps are configured to use the outlet at the side of the EH pump and the flange on the

underside of the EH pump is blanked off. If you do not wish to use the side ou tlet, remove the blanking-plate and ‘O’

ring from the outlet on the underside of the EH pump and refit the blanking-plate with a new ‘O’ ring over the side

outlet-flange.

Take note of the following when you connect your EH pump to the vacuum system.

zMove the EH pump to the required location and ensure that it is level and secure.

zFor optimum pumping speeds, ensure that the pipeline connected to the pump-inlet is as short as possible

and has a bore size not less than the inlet port diameter.

zUse a flexible connection in the pipeline from the vacuum system to the EH pump to reduce vibration and

stress in the system pipelines (see Section 3.2).

zOn very dusty applications, use a low-impedance inlet-filter to minimise abra sion in the EH pump.

WARNING

Do not exceed the load limits on the pump-inlet and outlet flanges as specified in Figure 22. If you

do, there will be a risk of leakage of process gases from the EH pump, or of damage to the EH pump.

WARNING

The ATEX compliant EH pumps rely on constructional safety for safe operation. If you wi ll use the

ATEX compliant EH pump i n a process in which dust or particles could enter and damage the ATEX

compliant EH pump, you must fit a suitable inlet filter.

WARNING

If particles, debris or loose components could enter the EH pump during commissioning, you must

fit a suitable inlet filter which you can remove before operating the EH pump on proce ss duties.

WARNING

If you fit an isolation valve between a chemical or ATE X compliant EH pump and the backing pump,

you must interlock the operation of the valve with the operation of the chem ical or ATEX compliant

EH pump, so that closure of the valve results in shut-down of the chemic al or ATEX compli ant EH

pump.

WARNING

If you will pump flammable gases, ensure that you r backing pump and exhaust-extraction/

abatement systems comply with the critical backing pressure re quirements of Section 2.2. If you

do not, there will be a risk of explosion during operation.

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Installation

A301-51-880 Issue T

3.10 External evacuation of hydrokinetic drive/gearbox (optional)

The hydrokinetic drive/gearbox may be evacuated using an external pump. A description of the c onnections required

is beyond the scope of this manual.

Contact your supplier or your nearest Edwards company for advice if you wish to use this facility.

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Installation

Figure 22 - Flange loading limits

1. Pump-inlet

2. Pump-outlet

F Force

M Moment

R Resultant

X Load orientation

Y Load orientation

Z Load orientation

Maximum force Pump-inlet Pump-outlet

±1000 N

±2000 N

±2400 N

±224 lbf

±449 lbf

±539 lbf

±750 N

±1500 N

±1800 N

±168 lbf

±337 lbf

±404 lbf

Maximum moment Pump-inlet Pump-outlet

±500 N m

±870 N m

±112 lbf ft

±195 lbf ft

300 N m

520 N m

± 67 lbf ft

±116 lbf ft

Note: EH250 pump shown. The flange

loading limits apply to all EH pumps.

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Operation

A301-51-880 Issue T

4 Operation

4.1 Operational safety

Ensure that the cooling-air flow around the EH pump and pump-motor is not restricted. (Refer to the ambient

temperature specification in Section 2.1). Take all necessary precautions to avoid accidental contact with the EH

pump.

4.2 Start-up procedure

4.2.1 Pre-start checks

1. Check that the EH pump oil-levels are correct (see Section 3.4).

2. If the EH pump is part of an ATEX system, ensure th at the gearbox purge is connected and the Nitrogen supply is

on.

3. Check that the EH pump is correctly installe d, especially after initial installation and maintenance.

WARNING

Ensure that the cooling-air flow around the EH pump and pum p motor is not restricted. If the air

flow is restricted, the pump and/or motor will get hotter than normal during pump operation:

zThis may result in reduced reliability or the risk of an explosion.

zIf the EH pump is part of an ATEX system, the high operating temperature may cause the motor

thermistors to shut down the system as required by the ATEX safety interlock circuit (refer to

Section 7 of the ATEX Instruction manual).

WARNING

During operation, parts of the EH pump can become very hot. Ensure that you do not touch the EH

pump.

WARNING

Do not operate the EH pump with the inlet or outlet open to atmosphere. If you do, your fingers

of other parts of your body may get trapped and you may be injured by the rotating pump

mechanism.

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Operation

4.2.2 Start-up

Start-up the EH pump as described in the procedure below. This procedure assumes that the EH pump and the vacuum

system are at atmospheric pressure.

1. On all of the EH1200, EH2600 and EH4200 model pumps only:

zSwitch on the cooling-water supply and check that there is an ade quate flow of cooling-water at the correct

pressure (see S ection 2.8).

zIf the EH pump is part of an ATEX system, ensure that the water flow rate is adequate, and that the flow-

switch indicates this.

zCheck the water connections for leaks.

Refer to Section 2.8 for the cooling-water requireme nts.

2. Close all valves to atmospheric pressure and ensure that all other openin gs are closed.

3. Switch on the backing pump and open the backing valve (if fitted).

4. Switch on the EH pump.

5. Allow the EH pump to run for approximately fifteen minutes to achieve normal operating tem perature.

6. Slowly open the pump-inlet isolation-valve (if fitted).

4.3 Shut-down

CAUTION

If the pump is to be shut down for a long period or is due to be shipped on, refer to Section 6.1 for the storage

instructions.

1. Close the pump-inlet isolation-valve (if fitted).

2. Leave the pump operating for sufficient time such that the pump is thoroughly purged of any hazardous

substances.

3. Switch off th e EH pump.

4. Open the backing pump air-admittance valve (if fitted) and switch off the backing pump.

5. On all of the EH1200, EH2600 and EH4200 model pumps only: turn off the cooling-water su pply.

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Maintenance

A301-51-880 Issue T

5 Maintenance

5.1 Safety information

zA suitably trained and supervised technician must maintain the EH pump.

zDismantle the EH pump in a clean workshop environment, with the correct tools and safety fac ilities

available.

zEnsure that the maintenance technician is familiar with the safety procedures which relate to the products

pumped. Wear the appropriate safety-clothing when yo u come into contact with contaminated components.

Dismantle and clean contaminated componen ts inside a fume-cupboard.

zAllow the EH pump to cool for at least three hours before you start maintenance work.

zVent and purge the pumping system with nitrogen before you start maintenance work.

zCheck that all the required parts are available and of the correct type before starting work.

zIsolate the EH pump and other components from the electrical supply so that they cannot be operated

accidentally.

zRe-check the EH pump rotation direction if the electrical supply has been disconnected.

zDo not reuse ‘O’ rings and Co-Seals.

zDispose of components and waste oil safely (see Section 6.2).

zTake care to protect sealing-faces from damage.

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

EH pump has been overheated to 260 ºC and above. These breakdown products are very dangero us.

Fluorinated materials in the EH pump may include oils, greas es and seals. The EH 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 EH pump are available on request: contact your su pplier or Edwards.

zLeak-test your system after installation and mainten ance to prevent leakage of dangerous substances out of

the system and leakage of air into the system.

The EH pump will be contaminated with the process chemicals that have been pumped. Ensure that you take

adequate precautions to protect people from the effects of dangerous substances if contamination has occurred.

WARNING

Obey the safety instructio ns given below and take no te of appropriate precautions. If you do not,

you can cause injury to people and damage to equipment.

Table 21 - Maintenance plan

Operation Frequency Refer to Section

Check the oil-levels Daily *or Weekly †

*Flammable materials pumped.

†Non-flammable mater ials pumped.

5.3

Inspect the pump conne ctions Monthly 5.4

Change the pump oil 12 monthly 5.5

Lubricate the rear bearing 12 monthly 5.6

Overhaul the pump 6 yearly 5.7

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Maintenance

5.2 Maintenance plan

Table 21 details the maintenance operations necessary to maintain EH pumps in normal use. Instruction s for each

operation are given in the section shown.

More frequent mainten ance may be required if the EH pump is used to pump co rrosive or abrasive gases and vapours.

If necessary, adjust the maintenance plan according to your experienc e.

5.3 Check the oil-levels

Note: If there is a loss of oil from the shaft-seal reservoir, the shaft-seal may have failed. Contact your supplier

or a Edwards Service Centre for advice.

Use the following procedure to check the oil-levels in the sight-glasses. Refer to F igure 1 and 2for the location of

the filler-plugs and sight-glasses. During normal operation, the hydrokinetic drive/gearbox sight-glass ( Figure 11,

item 3) may appear empty or show a froth because the oil is in circulation around the coupling.

1. Shut down the EH pump, vent it to atmospheric pressure and allow it to cool.

2. Refer to Figure 11. Check the shaft-seal oil-level. If the oil-level is below the bottom of the reflector plate (6),

refer to Section 3.4 and refill the shaft-seal reservoir.

3. Check the hydrokinetic drive/gearbox oil-level. If the oil-level is below the top of the reflector plate, refer to

Section 3.4 and refill th e hydrokinetic dr ive/gearbox oil r eservoir.

On all EH1200, EH2600 and EH4200 model

pumps only, check the gear-cover oil-level. If the oil-level is be low the

middle of the r eflector plate, refer to Section 3.4 and refill th e gear-cover.

5.4 Inspect the pump connections

1. Check that the cooling-water connections are secure.

2. Inspect the c ooling-water pipelines and connections for corrosion, leaks and damage.

3. Check that the electrical connections are secure.

4. Check the electrical supply cables for damage.

5. Inspect all the vacuu m pipelines for corrosion and damage. Check that all the vacuum co nnections are secure.

6. On chemical and ATEX compliant EH pumps only:

zInspect the hydrokinetic drive/gearbox purge nitrogen supply pipeline for corrosion and damage.

zCheck that the pipeline connection to the hydrokinetic drive/gearbox is secure.

WARNING

Constructional safety ensures that ATEX compliant EH pumps can safely pump flammable gases.

To ensure that the con structional safety of the ATEX compliant EH pump is not compromised, you

must maintain the ATEX compliant EH p ump in accordance with th e schedule given in Table 21 and

using the procedures described in Section 5.3 to 5.7 in this manual. If you do not, there may be a

risk of explosion and, if the pump is part of an ATEX certified system, the ATEX certification may

be invalidated.

WARNING

Ensure that the correct grade of oil is used and that the oil-levels in the pump are corre ct. If an

incorrect oil is used or if an oil-level is incorrect, EH pump performance may be affected and the

EH pump may be damaged, which will compromise its constructional safety.

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Maintenance

A301-51-880 Issue T

5.5 Change the pump oil

Replace the pump oil as described below. Refe r to Figure 1 and 2for the location of the oil-filler and drain-plugs.

1. Switch off the EH pump, v ent it to atmos pheric pressure and allow it to cool.

2. Remove the hydrokinetic drive/gearbox oil filler-plug.

3. Remove the hydrokinetic drive/gearbox oil drain-plug from the underside of the hydrokinetic drive /gearbox and

allow the oil to drain into a suitable container.

4. Remove the shaft-seal vented oil filler-plug. Use a suitable pump to suck the oil ou t of the shaft-seal reservoir.

5. Refit the hydrokinetic drive/gearbox oil drain-plug.

6. Refer to Section 3.4 and fill the hydr okinetic drive/gearbox and shaft-se al reservoir with oil.

7. Refit the hydrokinetic drive/gearbox oil filler-plug and the sh aft-seal reservoir oil filler-plug.

On all EH1200, EH2600 and EH4200

model pumps on ly:

zRemove the oil filler-plug on the gear-cover.

zRemove the oil drain-plug from the underside of the gear-cover and all ow the oil to drain into a suitable

container.

zRefit the oil drain-plug and refer to Section 3.4 to refill the gear-cover with oil.

zRefit the oil filler-plug.

WARNING

Changing the oil in an EH pump from h ydrocarbon to PFPE (Fomblin) could potentially cause a

safety hazard. Fomblin EH pumps are generally used in hazardous applications which may involve

the pumping of gase s with high conce ntrations of oxygen. If hydrocarbon oil comes into contact

with gases with an oxygen concentration greater than 25%, an explosion can occur.

Therefore, if you want to convert an E H pump that has been use d with hydrocarbon oil to use PFPE

(Fomblin) oil, you cannot s imply flush the EH pump with new PFPE oil. You m ust return the EH

pump to a Edwards Se rvice Centre for overhaul and cleaning by qualified Edwards service

engineers. The change in oil type requires a complete strip down of the EH pump, and thorough

cleaning of all parts, so that all traces of hydrocarbon oi l are removed.

WARNING

Ensure that the correct grade of oil is used and that the oil-levels in the pump are correct. If an

incorrect oil is used or if an oil-level is incorrect, EH pump performance may be affected and the

EH pump may be damaged, which will compromise its constructional safety.

A301-51-880 Issue T

Edwards and the Edwards logo are trademarks of Edwards Limited.

Maintenance

5.6 Lubricate the rear-bearing (All EH250 and EH500 model pumps

only)

Use the following proc edure to replace the grease in the r ear-bearing. Refer to Sect ion 2 .6 for the correct type/grade

of grease.

1. Switch off the EH pump and isolate it from the electrical supply. Vent the EH pump to atmospheric pressure.

2. Refer to Figure 23. Remove the four plastic cover-caps (8) from the bearing end-cover (6).

3. Undo and remove the socket-head screws (7 ) located under the four plastic cover-caps.

4. Remove the end-cover (6) and ‘O’ ring (5). Dispos e of the ‘O’ ring safely.

5. Note the exact location of the shims (4) and spacers (3) inside the end-cov er (6). Clean off all visible grease from

the end-cover taking care not to misplace or damage the shims a nd spacers.

6. Use a soft, clean, lint free cloth or a plastic or wooden spatula to remove all visible grease from both bearings

(2).

7. Fill the visible side of each bearing (2) with clean grease, then lightly force the grease into the bearing.

8. Refill the visible side of each bearing (2) with clean grease.

9. Apply a light wipe of high-vacuum grease to the new ‘O’ ring (5) and fit into the groove in the end cove r (6).

10. Check that the shims (4) and spacers (3) are correctly located in the end-cover (6).

11. Refit the end-cover (6) and secure it with the four socket-head screws (7). Tighten the screws evenly and refit

the plastic cover-caps (8).

12. Leak test the sy stem an d seal any leaks found.

WARNING

When you remove the end-cover, take note of the exact locations of the spacers and shims

(Figure 23, items 3 and 4) inside the end-cover. You must refit the se items correctly in order to

ensure that the rotor clearance settings remain correct. Altering the rotor clearance settings may

compromise the constructional safety of the pump and, if the pump is part of an ATEX system, may

invalidate the sys tem certification.

Edwards and the Edwards logo are trademarks of Edwards Limited.

Maintenance

A301-51-880 Issue T

5.7 Overhaul the pump

The EH pump can only be overhauled by Edwards service engineers: contact your supplier or Edwards for advice.

Figure 23 - Lubricate the rear bearing (E H250, EH500 and EH500IND pumps only)

1. Pump-body

2. Bearing

3. Spacer

4. Shims

5. ‘O’ ring

6. End-cover

7. Socket-head screw

8. Cover-cap

A301-51-880 Issue T

Edwards and the Edwards logo are trademarks of Edwards Limited.

This page has been intentionally left blank.

Edwards and the Edwards logo are trademarks of Edwards Limited.

Storage and Disposal

A301-51-880 Issue T

6 Storage and Disposal

6.1 Storage

CAUTION

Observe the storage temperature limits stated in Sectio n 2.1. Storag e below -30 ºC w ill permanently damage t he

EH pump seals and lubricants.

CAUTION

Ensure that the water lines are emptied if the pump will be stored below 0 °C. If you do not, the water in the

lines will freeze and may cause the pipes to burst. If the pump is to be shipped by air, the temperature in the

hold can drop to -50 °C. In such cases it is important that the lines are completely emptied o f water.

Use the procedure below to store the EH pump.

1. Shut-down the EH pump as described in Section 4.3.

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

3. Clean the EH pump and change the oil as describe d in Section 5.5.

4. Place protective covers over the inlet and ou tlet-flanges.

5. Store the EH pump in cool, dry conditions until required for use. When required, prepare and ins tall the EH

pump as described in Section 3.

6.2 Disposal

Dispose of the EH pump and any components safely in accordance with all local and national safety and environmental

requirements.

Take particular care with components and waste oil which have be en contaminated with dangerous pr ocess

substances.

A301-51-880 Issue T

Edwards and the Edwards logo are trademarks of Edwards Limited.

This page has been intentionally left blank.

Edwards and the Edwards logo are trademarks of Edwards Limited.

Service and Spares

A301-51-880 Issue T

7 Service and Spares

7.1 Introduction

Edwards products and spares are available from Edwards companies in Belgium, Brazil, Canada, China, France,

Germany, Israel, Italy, Japan, Korea, Singapore, Switzerland, United Kingdom, U.S.A, and a world-wide network of

distributors. The majority of these c entres employ Service Engineers who have undergone comprehensive Edwards

training courses.

Order spare parts from your nearest Edwards company or distributor. When yo u order, please state for each part

required:

zModel and Item Number of your equipment

zSerial number (if any)

zItem Number and description of part.

7.2 Service

Edwards products ar e 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.

Your local Service Centre can also provide Edwards engineers to support on-site maintenance, service or repair of

your equipment.

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

7.3 Spares

The spare parts listed in Table 22 are available for the EH pump.

The spare parts listed in Table 23 are available for the EH250 and EH500 pumps.

Table 22 - Spare item numbers

Spare Item Number

AR555 Fomblin grease (100 g tube)

End-cover ‘O’ ring

Ultragrade 20 oil (1 l)

Ultragrade 20 oil (4 l)

Krytox 1514 fluid (1 kg)

Krytox 1514 fluid (5 kg)

H113-50-013

H021-22-091

H110-24-015

H110-24-013

H113-08-018

H113-08-020

Table 23 - EH250 and EH500 spare parts

Spare Item Number

Clean and overhaul kit

Module kit

Shim kit

EH250 inlet mesh assembly 3.3 mm ISO63

EH250 inlet mesh assembly 3.5 mm ISO63 stainless steel

EH500 inlet mesh a ssembly 3.3 mm ISO100

EH500 inlet mesh assembly 3.5 mm ISO100 stainless stee l

A301-51-815

A301-51-820

A301-51-825

C105-21-085

A600-41-029

C105-23-085

A600-41-569

A301-51-880 Issue T

Edwards and the Edwards logo are trademarks of Edwards Limited.

Service and Spares

The spare parts listed in Table 24 are available for the EH1200 pumps.

The spare parts listed in Table 25 are available for the EH1200 pumps.

Table 24 - EH1200 spare parts

Spare Item Numbe r

Clean and overhaul kit

Module kit

Shim kit

EH1200 inlet mesh ass embly 3.3 mm ISO160

EH1200 inelt mesh assembly 3.5 mm ISO160 stainless steel

A305-51-815

A305-51-820

A305-51-825

C105-24-085

A600-41-570

Table 25 - EH2600 and EH4200 spare parts

Spare Item Number

Clean and overhaul kit

Module kit

Shim kit

EH2600 inlet mesh assembly 3.3 mm ISO160

EH2600 inelt mesh assembly 3.5 m m ISO160 stainless steel

EH4200 inlet mesh assembly 3.5 m m ISO250 stainless steel

A307-51-815

A307-51-820

A307-51-825

C105-24-085

A600-41-570

A600-41-571

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