BOC E2M28 User manual

A373–10–880 Issue K Original
Instruction Manual
E2M28 and E2M30 Rotary Vacuum Pumps
Description Item Number
E2M28, 100/200 V, 50 Hz or 100-105/200-210 V, 60 Hz, single-phase A373-15-904
E2M28, 115/230 V, 60 Hz, single-phase A373-15-981
E2M28, 200-240 V, 50 Hz, or 230-240 V, 60 Hz, single-phase A373-15-903
E2M28, 200-220/380-415 V, 50 Hz, or 200-230/460 V, 60 Hz, three-phase A373-10-940
E2M28, 200-240 V, 50 Hz, or 230-240 V, 60 Hz, single-phase (Amphenol) A373-16-903
E2M28, 110/200-240 V, 50 Hz, or 115-120/200-230 V, 60 Hz, single-phase A373-17-984
E2M28-FF, 220/240 V, 50 Hz, or 230/240 V, 60 Hz, single-phase A373-25-903
E2M28-FF, 200-220/380-415 V, 50 Hz, or 200-230/460 V, 60 Hz, three-phase A373-21-940
E2M30, 100/200 V, 50 Hz or 100-105/200-210 V, 60 Hz, single-phase A374-15-904
E2M30, 115/230 V, 60 Hz, single-phase A374-15-981
E2M30, 200-240 V, 50 Hz, or 230-240 V, 60 Hz, single-phase A374-15-903
E2M30, 200-220/380-415 V, 50 Hz, or 200-230/460 V, 60 Hz, three-phase A374-10-940

Declaration
ofConformity
W€, BOC
Edwards,
ManorRoyal,
Crawley,
WestSussexRH102LW,UK
declare
underoursole
responsibilitythatthe
product(s)
E2M28and
E2M30Rotary
VacuumPumps
A373-10-940 A373-15-981 A374-t0-940 A373-15-903
A373-2r-940 A374-15-903 A373-15-904 A373-25-903
A374-15-904 A373-16-903 A374-15-981 4373-L7-9U
towhichthisdeclaration
relates
isin
conformity
withthefollowingstandard(s)
orother
normativedocument(s)
ENISO12100-2:
2003 SafetyofMachinery
- Basic
Concepts,
General
Principles
forDesign.
EN61010-1:
2001 SafetyRequirements
forElectricalEquipment
forMeasurement,
Control,
andLaboratory
Use.x
EN1012-2:1997 Compressors
and
VacuumPumps
- SafetyRequirements,
Part?:
Vacuum
Pumps.
IEC34Parts1,5,8i, 11x:1991 Central
Requirements
forRotating
Electrical
Machines.
C22.2
No77:t998
# Motors
withInherent
Overheating
Protection.
C22.2
No100:1992
# Motors
andGenerators.
C22.2No1010.1:
t992
# Safety
Requirements
forElectrical
EquipmentforMeasurementControl
and
LaboratoryUse,
Part1:General
Requirements.
UL61010A:
2002# Electrical
Equipment
forLaboratoryUse,
Part1:General
Requirements.
UL1004:
1994# Electric
Motors.
EN13463-1:2001 Non
Electrical
EquipmentforPotentiallyExplosive
Atmospheres.
t 3-phase
pumps
only.
x l-phase
pumps
only. The
pumps
comply
withEN61010-1
wheninstalled
inaccordance
withthe
instruction
manualsupplied
withthe
pumps.
# l-phase
pumps
only. Canadian
Standards
AuthorityandUnderwriters
Laboratory.
followingthe
provisions
of
731023/EEC Low
Voltage
Directive.
89/336iEEC Electromagnetic
Compatibility
Directive.
98137/EC Machinery
Safety
Directive.
g4lglEc Equipment
foruse
inPotentially
Explosive
Atmospheres
(ATEX
Directive)
(Category
3GD)
Internal
AtmospheresOnly.
3 Dgc.engvr ?oo\t e\ontbilFl^
Dateand
Place
This
product
hasbeen
manufactured
underaquality
sysfem
registeredtolSO9001
JD.U"A-:
Dr,
J,
D.Watson,Directorof
Technology,
VacuumEquipmentand
ExhaustManagement
Product
Divisions
^AW BOC EDWARDS
<
u
-
@
I
o
c
4

E2M28 and E2M30 Rotary Vacuum Pumps
PAGE
i
Issue K iJul 05
CONTENTS
Section Page
1INTRODUCTION 1
1.1 Scope and definitions 1
1.2 ATEX directive implications 2
1.3 Description 4
1.4 Gas-ballast 4
2TECHNICALDATA 5
2.1 Operating and storage conditions 5
2.2 Performance 5
2.3 Mechanical data 6
2.4 Lubrication data 6
2.5 Electrical data 6
3 INSTALLATION 11
3.1 Safety 11
3.2 System design 12
3.3 Unpack and inspect 12
3.4 Locate the pump 13
3.5 Fill the pump with oil 13
3.6 Electrical installation: single-phase motors 14
3.6.1 Introduction 14
3.6.2 Standard single-phase motors 15
3.6.3 Amphenol version single-phase motors 15
3.6.4 110/200-240 V 50 Hz or 115-120/200-230 V 60 Hz single-phase motors 15
3.7 Electrical installation: three-phase motors 19
3.7.1 Connect the electrical supply to the motor 19
3.7.2 Check the direction of rotation 20
3.8 Connect the pump inlet 20
3.9 Connect the pump outlet 22
3.10 Gas-ballast inlet connection 22
3.11 Leak test the system 22
4OPERATION 23
4.1 ATEX directive implications 23
4.1.1 Introduction 23
4.1.2 Flammable/pyrophoric materials 23
4.1.3 Gas purges 24
4.2 Gas-ballast control 24
4.3 Start-up 25
4.4 To achieve ultimate vacuum 25
4.5 To pump condensable vapours 26
4.6 To decontaminate the oil 26
4.7 Unattended operation 26
4.8 Shut-down 27
Ipsitech 8207(D)–05

E2M28 and E2M30 Rotary Vacuum Pumps
PAGE
ii
Issue K ii Jul 05
Section Page
5 MAINTENANCE 29
5.1 Safety information 29
5.2 Maintenance plan 29
5.3 Check the oil-level 30
5.4 Replace the oil 30
5.5 Inspect and clean the inlet-filter 31
5.6 Clean the gas-ballast filter 32
5.7 Clean the motor fan-cover and enclosure 33
5.8 Clean and overhaul the pump 33
5.9 Fit new blades 33
5.10 Test the motor condition 33
5.11 Fault finding 33
5.11.1 Introduction 33
5.11.2 The pump has failed to start 33
5.11.3 The pump fail to achieve specified performance (failure to reach ultimate vacuum) 34
5.11.4 The pump is noisy 34
5.11.5 The pump surface temperature is above 100 oC34
5.11.6 The vacuum is not maintained after the pump is switched off 35
5.11.7 The pumping speed is poor 35
5.11.8 There is an external oil leak 35
6 STORAGE AND DISPOSAL 37
6.1 Storage 37
6.2 Disposal 37
7 SERVICE, SPARES AND ACCESSORIES 39
7.1 Introduction 39
7.2 Service 39
7.3 Spares 39
7.4 Accessories 40
7.4.1 Introduction 40
7.4.2 Inlet Catchpot 40
7.4.3 Inlet Dust Filter 40
7.4.4 Inlet Desiccant Trap 40
7.4.5 Inlet Chemical Trap 40
7.4.6 Outlet Mist Filter 40
7.4.7 Solenoid Operated Pipeline Valve 42
7.4.8 Foreline Trap 42
7.4.9 Vibration Isolators 42
7.4.10 Oil Drain Extension 42
7.4.11 Pump Inlet Adaptor 42
7.4.12 Flexible Bellows 42
7.4.13 Pump Outlet Adaptor 42
7.4.14 Gas Ballast Banjo/Elbow Assembly 42
7.4.15 Gas Ballast Valve 42
RETURN OF BOC EDWARDS EQUIPMENT

E2M28 and E2M30 Rotary Vacuum Pumps
PAGE
iii
Issue K iii Jul 05
ILLUSTRATIONS
Figure Page
1 The E2M28/E2M30 pump 3
2 Dimensions (mm): key 8
3 Electrical supply connection: single-phase motors: 220-240 V 50 Hz and
230-240 V 60 Hz 16
4 Electrical supply connection: single-phase motors: 100 V 50 Hz, 100-105 V 60 Hz
and 115 V 60 Hz 16
5 Electrical supply connection, single-phase motors: 200 V 50 Hz, 200-210 V 60 H
and 230 V 60 Hz 17
6 Electrical supply connection, single-phase motors with Amphenol connector:
220-240 V 50 Hz and 230-240 V 60 Hz 17
7 Motor voltage selection: single-phase motors, 110/200-240 V 50 Hz and
115-120/200-240 V 60 Hz 18
8 Electrical supply connection, three-phase motors: 200-220 V 50 Hz and
200-230 V 60 Hz 21
9 Electrical supply connection, three-phase motors: 380-415 V 50 Hz and 460 V 60 Hz 21
10 Remove/replace the inlet filter 31
11 Remove/replace the gas-ballast filter 32
12 Accessories 41
TABLES
Table Page
1 Operating and storage conditions 5
2Performancedata 5
3 Mechanical data 6
4 Lubrication data 6
5 Electrical data: three-phase motors 7
6 Electrical data: single-phase motors 7
7 Checklist of items 12
8 Motor connection details 14
9 Maintenance plan 30
10 Spares Item Numbers 39
11 Accessory Item Numbers 40
Associated publications
Publication title Publication Number
Vacuum pump and vacuum system safety P300-20-000
Vibration isolators A248-01-880
EMF3, EMF10 and EMF20 oil mist filters A462-26-880

E2M28 and E2M30 Rotary Vacuum Pumps
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Issue K iv Jul 05
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E2M28 and E2M30 Rotary Vacuum Pumps
INTRODUCTION
PAGE
1
Issue K 1Jul 05
1INTRODUCTION
1.1 Scope and definitions
This manual provides installation, operation and maintenance instructions for the BOC Edwards E2M28
and E2M30 rotary vacuum pumps. You must use the pump as specified in this manual.
Read this manual before you install and operate the 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.
The units used throughout this manual conform to the SI international system of units of measurement.
The following warning labels are on the pump:
Warning – refer to accompanying documentation.
Warning – risk of electric shock.
Warning – hot surfaces.
WARNING
Warnings are given where failure to observe the instruction could result in injury or death
to people.
CAUTION
Cautions are given where failure to observe the instruction could result in damage to the equipment,
associated equipment and process.
Warning - do not block the pump outlet.

E2M28 and E2M30 Rotary Vacuum Pumps
INTRODUCTION
PAGE
2
Issue K 2Jul 05
1.2 ATEX directive implications
• This equipment is designed to meet the requirements of Group II Category 3 equipment in
accordance with Directive 94/9/EC of the European Parliament and the Council of 23rd March 1994
on the approximation of the laws of the Member States concerning equipment and protective
systems intended for use in potentially explosive atmospheres. (The ATEX Directive)
The ATEX Category 3 applies in respect of potential ignition sources internal to the equipment. An
ATEX Category has not been assigned in respect of potential ignition sources on the outside of the
equipment as the equipment has not been designed for use where there is an external potentially
explosive atmosphere.
There is no potential source of ignition within the pump during normal operation but there may be
potential sources of ignition under conditions of predictable and rare malfunction as defined in the
Directive. Accordingly, although the pump is designed to pump flammable materials and mixtures,
operating procedures should ensure that under all normal and reasonably predictable conditions,
these materials and mixtures are not within explosive limits. Category 3 is considered appropriate
for the avoidance of ignition in the case of a rare malfunction which allows flammable materials or
mixtures to pass through the pump while within their explosive limits.
• When flammable or pyrophoric materials are present within the equipment you must:
• Not allow air to enter the equipment.
• Ensure that the system is leak tight.
• Use an inert gas purge (for example, a nitrogen purge) to dilute any flammable gases or
vapours entering the pump inlet, and/or use an inert gas purge to reduce the concentration
of flammable gases or vapours in the pump and in the exhaust pipeline to less than one quarter
of the gases' published lower explosive limits (LEL).
• For further information, please contact BOC Edwards: refer to the Addresses page at the end of
this manual for details of your nearest BOC Edwards company.

E2M28 and E2M30 Rotary Vacuum Pumps
INTRODUCTION
PAGE
3
Issue K 3Jul 05
Figure 1 – The E2M28/E2M30 pump
1. Oil filler
2. Outlet nozzle
3. Gas-ballast control
4. Gas-ballast inlet
5. Centring-ring and ‘O’ ring (supplied)
6. Inlet-port (adaptor flange)
7. Cable-gland/Amphenol connector position
8. Motor terminal box
9. On/Off switch
10. Baseplate
11. Oil drain-plug (gravity drain)
12. Oil sight-glass
13. Pump identification label
Notes: A pump with a single-phase motor is shown in this figure.
The motor shown in this figure is not representative of the motor used on the E2M28
(Amphenol) pump with Item Number A373-17-984. On this pump, items 7 and 9 are
transposed, with Item 7 being an IEC60320 16-20 Amp socket.

E2M28 and E2M30 Rotary Vacuum Pumps
INTRODUCTION
PAGE
4
Issue K 4Jul 05
1.3 Description
The BOC Edwards E2M28 and E2M30 pumps are shown in Figure 1. Refer to Figure 1 for item numbers
in brackets in the following descriptions.
The E2M28 and E2M30 pumps are two-stage, direct drive, sliding vane pumps. The pump is oil-sealed and
designed for reliable, long-term operation in both laboratory and industrial environments. The pump is
a free-standing unit. The drive is provided through a flexible coupling by a single-phase or three-phase
(four pole) motor.
The motors are totally enclosed and are cooled by the motor-cooling fan which directs air along the
motor fins.
The single-phase motors have a thermal overload device. When the motor is too hot, the thermal
overload device switches off the pump. The thermal overload device has an automatic reset; when the
motor cools down, the device resets and the motor will restart. The single phase motors have an on/off
switch.
An oil pressure system lubricates the pump shaft bearing surfaces and rotor sealing faces. The pump has
an oil distribution valve which prevents discharge of oil to the pump interior (suckback) after the pump
stops. The pumping chambers are air-tight, so this arrangement prevents air suckback unless the gas-
ballast valve is open. For protection in this case, refer to Section 1.4.
You can inspect the level and condition of oil in the oil box reservoir through the oil sight-glass (12). An
oil filler-plug (1) is fitted to the top of the oil box. The pump has an oil drain-plug (11) to allow gravity
oil drain.
The pump has an inlet-port (6), outlet nozzle (2) and gas-ballast control (3). The pump is mounted on an
aluminium alloy baseplate (10) on rubber pads. Details of suitable vibration isolators and other
recommended accessories are given in Section 7.4.
1.4 Gas-ballast
To pump high vapour loads, gas-ballast is delivered into the pump to prevent condensation of the vapour
carried by the pumped gases.
Air (or another gas) can be introduced into the low vacuum stage through the gas-ballast control. The
gas-ballast control is a multi-turn valve which you can adjust, as required, between closed and fully open.