Edwards Microvac 149-HS, Microvac 212-J, Microvac 412-J, Microvac 149-H Instruction Manual

S149-01-880

Issue F Original

Instruction Manual

149-H/149-HS/212-J/412-J Microvac® Pumps

Description Item Number

149H Microvac Rotary Piston Pump 230/460 V, 3 Ø, 60 Hz with 230/460 V Coil 900-149-011 149H Microvac Rotary Piston Pump 400 V, 3 Ø, 60 Hz with 380 V Coil 900149011501 149H Microvac Rotary Piston Pump 400 V, 3 Ø , 60 Hz with 415 V Coil 900149011502 149H Microvac Rotary Piston Pump 400 V, 3 Ø, 60 Hz with 380 V Coil with Water Miser 900149011503 149H Microvac Rotary Piston Pump 400 V, 3 Ø, 60 Hz with 415 V Coil with Water Miser 900149011504 149HS Microvac Rotary Piston Pump 230/460 V, 3 Ø, 60 Hz with 230/460 V Coil 930-149-011 212J Microvac Rotary Piston Pump 230/460 V, 3 Ø, 60 Hz with 230/460 V Coil 900-212-014 212J Microvac Rotary Piston Pump 400 V, 3 Ø, 60 Hz with 380 V Coil 900212014501 212J Microvac Rotary Piston Pump 400 V, 3 Ø, 60 Hz with 415 V Coil 900212014502 212J Microvac Rotary Piston Pump 400 V, 3 Ø, 60 Hz with 380 V Coil with Water Miser 900212014503 212J Microvac Rotary Piston Pump 400 V, 3 Ø, 60 Hz with 415 V Coil with Water Miser 900212014504 412J Microvac Rotary Piston Pump 230/460 V, 3 Ø, 60 Hz with 230/460 V Coil 900-412-014 412J Microvac Rotary Piston Pump 400 V, 3 Ø, 50 Hz with 380 V Coil 900412014501 412J Microvac Rotary Piston Pump 400 V, 3 Ø, 50 Hz with 415 V Coil 900412014502 412J Microvac Rotary Piston Pump 400 V, 3 Ø, 50 Hz with 380 V Coil with Water Miser 900412014503 412J Microvac Rotary Piston Pump 40 0V, 3 Ø, 50 Hz with 415 V Coil with Water Miser 900412014504

This product has been manufactured under a quality system registered to ISO9001

Declaration of Conformity

We, Edwards, Manor Royal, Crawley, West Sussex, RH10 9LW, UK

declare under our sole responsibility, as manufacturer and person within the EU authorised to assemble the technical file, that the product(s)

900 YYYYYY 50 Z Pump Model Voltage/TCV Option

YYYYYY Z 149011 = 149-H Pump 1 = 400 V, 3 Ph, 50 Hz/380 V, 3 Ph, 50 Hz 212014 = 212-J Pump 2 = 400 V, 3 Ph, 50 Hz/415 V, 3 Ph, 50 Hz 412014 = 412-J Pump 3 = 400 V, 3 Ph, 50 Hz/380 V, 3 Ph, 50 Hz with TCV 4 = 400 V, 3 Ph, 50 Hz/415 V, 3 Ph, 50 Hz with TCV

930 14901150 Z Pump Model Voltage/TCV Option

Z 149-HR Pump 1 = 400 V, 3 Ph, 50 Hz/380 V, 3 Ph, 50 Hz 2 = 400 V, 3 Ph, 50 Hz/415 V, 3 Ph, 50 Hz 3 = 400 V, 3 Ph, 50 Hz/380 V, 3 Ph, 50 Hz with TCV 4 = 400 V, 3 Ph, 50 Hz/415 V, 3 Ph, 50 Hz with TCV

to which this declaration relates is in conformity with the following standard(s) or other normative document(s)

EN1012-2:1996, A1: 2009 Compressors and Vacuum Pumps. Safety Requirements. Vacuum Pumps EN60034-1: 2004 Rotating electrical machines. Rating and performance

and fulfils all the relevant provisions of 2006/42/EC Machinery Directive

2006/95/EC Low Voltage Directive 2004/108/EC Electromagnetic Compatibility (EMC) Directive

Note: This declaration covers all product serial numbers from the date this Declaration was

signed onwards.

Peter Meares, Technical Support Manager – Industrial & Chemical

Date and Place

P200-04-280 Issue A

9 December 2009

Contents

S149-01-880 Issue F

Contents

Section Page

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

1.1 Scope ...................................................................................................................... 1

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

1.3 Description ................................................................................................................ 2

1.3.1 Gas ballast ................................................................................................................ 2

1.3.2 Water system ............................................................................................................. 2

1.3.3 Electrical system .........................................................................................................6

1.3.4 Lubricants ................................................................................................................. 6

1.3.5 Guards ..................................................................................................................... 6

1.3.6 Vacuum access ports .................................................................................................... 6

1.3.7 Oil temperature sensor/heater access ports (412-J pump only) ................................................. 6

1.3.8 Oil drain port (412-J pump only) ...................................................................................... 6

2 Technical data ....................................................................................7

2.1 Operating and storage conditions ..................................................................................... 7

2.2 Pump specifications ..................................................................................................... 7

2.3 Materials in contact with process gases .............................................................................. 8

2.4 Electrical data ............................................................................................................ 8

3 Installation .................................................... ................................... 13

3.1 Safety ..................................................................................................................... 13

3.2 System design considerations .........................................................................................14

3.3 Unpack and inspect .....................................................................................................14

3.4 Locate the pump ........................................................................................................14

3.5 Inlet piping ...............................................................................................................15

3.5.1 Vacuum access port locations ........................................................................................16

3.6 Exhaust piping ...........................................................................................................17

3.7 Electrical connections ..................................................................................................18

3.8 Cooling ...................................................................................................................20

3.9 Pump lubrication ........................................................................................................20

3.9.1 Initial oil fill .............................................................................................................21

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

4.1 Pre-start check ..........................................................................................................23

4.2 Pump start ...............................................................................................................23

4.3 Gas ballast operation ...................................................................................................24

4.4 Pump stop ................................................................................................................25

4.5 Operating notes .........................................................................................................25

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

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

5.2 Leak detection ..........................................................................................................27

5.3 Maintenance plan .......................................................................................................28

5.4 Oil change ................................................................................................................29

5.5 Oil level check ..........................................................................................................29

5.6 Valve deck maintenance ...............................................................................................29

5.7 Belt maintenance .......................................................................................................30

5.8 Drive belt tension .......................................................................................................30

5.9 Gas ballast check valve replacement ................................................................................30

5.10 Fitment or replacement of the motor (412J models only) .......................................................31

dcs/8822/11/11

S149-01-880 Issue F

Edwards and the Edwards logo are trademarks of Edwards Limited.

Contents

5.11 Fault finding .............................................................................................................32

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

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

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

7 Spares and accessories ......................................................................... 37

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

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

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

7.4 Accessories ...............................................................................................................37

8 PFPE-prepared Microvac pumps .............................................................. 39

8.1 Summary .................................................................................................................39

8.2 Installation ............................................................................................................... 39

8.3 Operation ................................................................................................................39

8.4 Maintenance ............................................................................................................. 39

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

Illustrations

Figure Page

1 Theory of operation ..................................................................................................... 2

2 149-H/149-HS pump general arrangement ........................................................................... 3

3 212-J pump general arrangement ..................................................................................... 4

4 412-J pump general arrangement ..................................................................................... 5

5 149-H/149-HS pump dimensions ....................................................................................... 8

6 212-J pump dimensions .................................................................................................9

7 412-J pump dimensions ................................................................................................10

8 Pump speed curves .....................................................................................................11

9 Inlet piping configurations ............................................................................................16

10 Exhaust piping ...........................................................................................................18

11 Electrical schematic .................................................................................................... 19

12 Gas ballast setting ......................................................................................................24

13 Typical vacuum system piping ........................................................................................28

14 Collar bolt positions and motor frame sizes ........................................................................31

Contents

S149-01-880 Issue F

Tables

Table Page

1 General data .............................................................................................................. 7

2 Pump technical specifications ......................................................................................... 7

3 Motor specifications, IEC motors (CE pumps) ....................................................................... 9

4 Motor specifications, NEMA motors ..................................................................................10

5 Maintenance plan .......................................................................................................28

6 Belt tension ..............................................................................................................30

7 Motors the can be fitted to 412J pump models ....................................................................31

8 Fault finding guide ......................................................................................................32

Associated publications

Publication title Publication number

Vacuum pump and vacuum system safety P300-20-000

Trademark credits

Fomblin® is a registered trademark of Ausimont SpA.

This page has been intentionally left blank.

S149-01-880 Issue F

Edwards and the Edwards logo are trademarks of Edwards Limited.

Introduction

S149-01-880 Issue F

1Introduction

1.1 Scope

This manual provides installation, operation and maintenance instructions for Model 149-H, 149-HS, 212-J and 412-J Microvac pumps (referenced as ‘Microvac pump’ throughout the remainder of the manual). The Microvac pump must be used as specified in this manual. Read this manual before installing and operating the pump.

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

CAUTION

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

The units used throughout this manual conform to SI international system of measurement followed by imperial units in parenthesis; SI (imperial).

The following warning symbols are on the pump:

WARNING

Warnings are given where failure to observe the instruction could result in injury or death to people.

Warning - refer to accompanying documentation.

Warning - risk of electric shock.

Warning - hot surfaces. Warning - risk of explosion

Warning - use protective equipment Warning - moving parts

S149-01-880 Issue F

Edwards and the Edwards logo are trademarks of Edwards Limited.

Introduction

1.2 ATEX directive implications

The Microvac pump is not designed to meet European ATEX requirements.

1.3 Description

The Microvac pumps are self-contained, rotary, oil sealed piston type units. An eccentric mounted on the drive shaft drives the piston. Two free-oscillating floating hinge bars in the pump housing guide the piston slide. The piston assembly rotates clockwise when facing the drive end. Air enters the pump through the intake and passes through the piston slide as the piston performs its in take stroke. As the piston nears the top center position the intake port is closed, separating the system from the pump (see Figure 1). The air is entrapped on the front side of the piston as it begins the next stroke. As the piston continues to rotate, the entrapped air is compressed and discharged through the exhaust valves and out the reservoir exhaust outlet. The exhaust valves are a corrosion-resistant, heavy duty, poppet type.

Figure 1 - Theory of operation

When the pump is in operation, lubrication of the internal parts is completely automatic. Oil is forced by atmospheric pressure from the reservoir thro ugh int er nal oil pa ssa ge s to the shaft bearings. The oil is then fed into the pump to provide the necessary piston-to-cylinder oil seal. The oil in the pumping chamber is forced out throu gh the exha ust valves with the compressed air and returns to the reservoir. A solenoid valve prevents oil from flooding the pump in the event of a power failure or when the pump is shutdown without vacuum being broken.

The pump general arrangements are provided in Figures 2 through 4.

1.3.1 Gas ballast

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

Air can be introduced to the low vacuum stage. Alternatively, an inert gas such as nitrogen can be supplied through a suitable external valve.

1.3.2 Water system

A cooling water supply rated at 30 °C (85 °F) and 3.8 LPM (1 GPM) for the 149-H/149-HS, 5.7 LPM (1.5 GPM) for the 212-J, and 7.6 LPM (2 GPM) for the 412-J maximum is required for efficient pump performance. Internal pump water pressure should not exceed 35 psig (Refer to Section 3.8 for information).

WARNING

Cooling lines must be installed as to not create a trip hazard which can result in injury to personnel.

Introduction

S149-01-880 Issue F

Figure 2 - 149-H/149-HS pump general arrangement

1. Check valve

2. Ball valve, gas ballast

3. Oil level sight glass

4. System lift eye-bolt

5. Water outlet conne ction

6. Water inlet connection

7. 1/4 inch vacuum access port

8. Motor lift eye-bolt

9. Motor

10.Oil fill port

11.Vacuum inlet connection

12.1/2 inch vacuum access port

13.Oil drain valve

14.Oil flow indicator

15.Vacuum exhaust connection

16.Belt guard

17.Solenoid valve

S149-01-880 Issue F

Edwards and the Edwards logo are trademarks of Edwards Limited.

Introduction

Figure 3 - 212-J pump general arrangement

1. Oil flow indicator

2. Solenoid valve

3. Vacuum exhaust connection

4. Water inlet connection

5. Gas ballast purge connection

6. Gas ballast adjustment

7. 1/4 inch vacuum access port

8. Belt guard

9. Motor lift eye-bolt

10.Vacuum inlet connection

11.1/2 inch vacuum access port

12.Water outlet connection

13.Oil level sight glass

14.Oil fill port

15.Motor

16.System lift eye-bolt

17.Reservoir cover

18.Oil drain valve

Introduction

S149-01-880 Issue F

Figure 4 - 412-J pump general arrangement

1. Oil level sight glass

2. System lift eye-bolt

3. Motor lift eye-bolt

4. Reservoir cover

5. Oil flow indicator

6. 1/2 inch vacuum access port

7. Oil drain port, dead end

8. Vacuum exhaust connection

9. Motor

10.Oil fill port/pressure relief

11.Water outlet connection

12.Solenoid valve

13.Oil temperature sensor port

14.Oil temperature heater port

15.Oil drain valve

16.Water inlet connection

17.Gas ballast purge connection

18.Gas ballast adjustment

19.1/4 inch vacuum access port

20.Belt guard

21.Vacuum inlet connection

S149-01-880 Issue F

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Introduction

1.3.3 Electrical system

The main power supply is 400 VAC/3 Ph/ 50 Hz and should be wire d through a suitable fused motor starter. Power for the oil solenoid is taken from any two motor leads. Check both motor and solenoid na meplates to insure prop er voltage (Refer to Section 3.7 for information).

1.3.4 Lubricants

Refer to Section 2 for recommended pump fluids.

1.3.5 Guards

The motor pulley, pump pulley, belts and flywheel are enclosed by guards to prevent accidental contact with these parts. The pump should never be operated with guards removed.

1.3.6 Vacuum access ports

CAUTION

When connecting a gauge to one of the ports, it is necessary to provide a 90° elbow and a minimum of 305 mm (12 inches) of vertical pipe to the gauge sensor to reduce the chance of contaminating the gauge with pump lubricants.

The pump is provided with 1/4 inch and 1/2 inch NPT vacuum access ports. These ports are provided for customer convenience. The ports can be used for gauges to monitor the pump performance or access for introducing purge gases to the pump.

1.3.7 Oil temperature sensor/heater access ports (412-J pump only)

Oil temperature sensor/heater ports have been added to the 412-J pump to provide a means to monitor and heat the pump oil. The sensor monitors the oil temperature in the pump and can be used a s an indicator for service. The heater can be used to heat the oil if it is below minimum starting temperature to reduce the amount of condensables in the oil (Refer to Figure 4 Items 13 and 14).

1.3.8 Oil drain port (412-J pump only)

A 1/4 inch oil drain access port has been added to provide a means of removing oil that pools above the valve decks (Refer to Figure 4 Item 7).

WARNING

Electrical lines must be installed as to not create a trip hazard which can result in injury to personnel.

Technical data

S149-01-880 Issue F

2Technical data

2.1 Operating and storage conditions

2.2 Pump specifications

Technical specifications for Microvac pumps are provided in Table 2. Pump dimensions are shown in Figures 6, 7 and 8.

Table 1 - General data

General items Reference data

Ambient temperature range (operation) 12 to 40 °C (54 to 104 °F) Normal surface temperature of the pump body at ultimate vacuum

(operation), ambient temperature of 20 °C (68 °F)

50 to 70 °C (122 to 158 °F)

Maximum humidity (operation) 90 % RH Ambient temperature range (storage) -30 to 70 °C (-22 to 158 °F)

Table 2 - Pump technical specifications

Specification Unit 149-H 149-HS 212-J 412-J

Ultimate vacuum microns Hg < 25 < 25 < 25 < 25 Displacement cfm 80 100 150 300

3h-1

135 170 255 510

Pump speed rpm 490 612 500 490

Vacuum inlet inch 2 ANSI 2 ANSI 3 ANSI 4 ANSI Vacuum exhaust inch 1-1/2 NPT 1-1/2 NPT 2 NPT/FLG 3 NPT/FLG

Pipe connections

Water inlet inch 1/2 NPT 1/2 NPT 1/2 NPT 1/2 NPT

mm 13 13 13 13

Water outlet inch 1/2 NPT 1/2 NPT 1/2 NPT 1/2 NPT

mm 13 13 13 13

Oil capacity gal 2-1/2 2-1/2 4 12

liters 10 10 15 46

Weight

Net lb 686 686 950 1875

kg 311 311 431 850

Shipping lb 800 800 1075 1975

kg 363 363 488 896

Height inch 39-3/4 39-3/4 46 55

mm 1009 1009 1171 1395

Floor space inch 23-1/2 x 20-1/8 23-1/2 x 20-1/8 26-1/4 x 24 40-1/4 x 25-5/8

mm 597 x 511 597 x 511 667 x 610 1022 x 651

Cooling water consumption (maximum)

gpm 1 1 1.5 2

lpm 3.8 3.8 5.7 7.6

S149-01-880 Issue F

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Technical data

2.3 Materials in contact with process gases

The following material will come in contact with process gases. A safety review should be performed considering the effect of process gases on the following materials: Aluminum; Buna N; Brass; Cast Iron; Ductile Iron; Fluoroelastomer; Steel; Stainless Steel; Hydrocarbon Oil, and; Atmosphere.

2.4 Electrical data

The motor specifications are provided in Table 2 and Table 3. Motor speed curves are provided in Figure 6. Items ending with 501 or 503 utilize a 380 VAC, 50 Hz solenoid. Items ending with 502 or 504 utilize a 415 VAC, 5 0 Hz

solenoid.

Figure 5 - 149-H/149-HS pump dimensions

Inlet cooling water temperature (maximum)

°F 85 85 85 85 °C 30 30 30 30

Table 2 - Pump technical specifications (continued)

Specification Unit 149-H 149-HS 212-J 412-J

Technical data

S149-01-880 Issue F

Figure 6 - 212-J pump dimensions

Note: Refer to motor rating nameplate for weight, efficiency, motor speed, and full load amperage values.

Table 3 - Motor specifications, IEC motors (CE pumps)

Specification

900149011501

/2/3/4

930149011501

/2/3/4

900212014501

/2/3/4

900412014501

/2/3/4

Enclosure IP55 IP55 IP55 IP55 Ambient temperature 40 °C (104 °F) 40 °C (104 °F) 40 °C (104 °F) 40 °C (104 °F) Frame DF100L DF112M DF132S DF160M Insulation class F3F3F3F3 Electrical supply 200/400 200/400 200/400 200/400 Service factor 1.15 1.15 1.15 1.15 Duty Continuous Continuous Continuous Continuous Mounting B3/B5 B3 B3 B3 Phase/frequency 3/50 Hz 3/50 Hz 3/50 Hz 3/50 Hz kW 2.2 4.0 5.5 11.0

1111 m m (43-3/4")

79 mm

(3-1/8")

667 mm

(26-1/4")

333 mm

(13-1/8")

333 mm

(13-1/8")

139 mm

(5-1/2")

141 mm

(5-15/16")

695 mm

(27-3/8")

413 mm

(16-1/4")

349 mm

(13-3/4")

581 mm

22-7/8"()

11 1 mm7

(46")

507

(19-15/16 )mm"

S149-01-880 Issue F

Edwards and the Edwards logo are trademarks of Edwards Limited.

Technical data

Figure 7 - 412-J pump dimensions

Table 4 - Motor specifications, NEMA motors

Specification 900-149-011 930-149-011 900-212-014 900-412-014

Enclosure TEFC TEFC TEFC TEFC Ambient temperature 40 °C (104 °F) 40 °C (104 °F) 40 °C (104 °F) 40 °C (104 °F) Frame 182T 184T 213T 215T Insulation class F4 F4 F F Electrical supply 230/460 230/460 230/460 230/460 Service factor 1.15 1.15 1.15 1.15 Duty Continuous Continuous Continuous Continuous Mounting F1F1F1F1

Technical data

S149-01-880 Issue F

Note: Refer to motor rating nameplate for weight, efficiency, motor speed, and full load amperage values.

Figure 8 - Pump speed curves

Phase/frequency 3/60 Hz 3/60 Hz 3/60 Hz 3/60 Hz HP 3.0 5.0 7.5 10.0

Table 4 - Motor specifications, NEMA motors (continued)

Specification 900-149-011 930-149-011 900-212-014 900-412-014

S149-01-880 Issue F

Edwards and the Edwards logo are trademarks of Edwards Limited.

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Installation

S149-01-880 Issue F

3 Installation

3.1 Safety

Ensure that the Microvac pump is suitable for the application. Refer to the Edwards guidelines on vacuum pump and vacuum system safety (see the associated publications at the end of the Contents list at the front of this manual).

Installation of the Microvac pump must be performed by a suitably trained and supervised technician. Obey the safety instructions listed below when the pump is installed, especially when connecting the pump into an existing system. Details of specific safety precautions are provided at the appropriate point in the instructions.

z Wear appropriate safety clothing when there is potential for contact with contaminated components. z Vent and purge the vacuum system before installation work is started. z Ensure that the installation technician is familiar with the safety procedures which relate to the pump oil

and other products handled by the pumping system. Take suitable precautions to avoid the inhalation of oil mist and excessive skin contact with pump oil, as prolonged exposure can be harmful.

z Disconnect the other components in the pumping system from the electrical supply to prevent accidental

operation.

WARNING

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

WARNING

We do not recommend that you use the Microvac pumps to pump hazardous substances.

WARNING

Ensure that the exhaust pipeline cannot become blocked. If an exhaust isolation valve has been installed, ensure that the pump cannot be operated with the valve closed.

WARNING

The Microvac pumps are only approved for use on applications using air, nitrogen and other inert gases.

Do not pump oxygen, hydrogen, chemically active, corrosive or flammable gases or gas mixtures, the presence of which can result in an explosion.

Refer to the Mechanical Pump and Pumping System Safety Chemical and Industrial Vacuum Systems Safety Manual (supplied with the pump), Edwards Publication Number P400-40-100 for recommendations.

Consult Edwards for specific applications assistance prior to operating the pump for hazardous applications.

S149-01-880 Issue F

Edwards and the Edwards logo are trademarks of Edwards Limited.

Installation

3.2 System design considerations

Consider the following points when designing the pumping system:

z Use a suitable valve to isolate the pump from the vacuum system if there is a need for the pump to warm up

before pumping condensable vapors, or to provide additional system protection when the pump is switched off.

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

seize.

z If the pump is used in a high ambient temperature and has a high gas throughput, the temperature of the

pump body may exceed 70 °C (158 °F) and must be fitted with suitable guards to prevent contact with hot surfaces.

z Ensure that the exhaust pipeline cannot become blocked. If an exhaust isolation valve has been installed,

ensure that the pump cannot be operated with the valve closed.

z Provide for a purge of inert gas when the pumping system is shutdown to dilute dangerous gases to safe

concentrations.

3.3 Unpack and inspect

Remove all packing materials, remove the pump from its packing box, remove the protective covers from the inlet and exhaust ports and inspect the pump. If the pump is damaged, notify the supplier and carrier in writing within three days; state the item number of the pump together with the order number and supplier's invoice number. Retain all packing materials for inspecti on. Do not use the pump if damaged.

If the pump is not used immediately, replace the protective covers. Store the pump in suitable conditions as described in Section 6 of this manual.

3.4 Locate the pump

Locate the pump close to the equipment being evacuated so that the vacuum, water and exhaust connections can be conveniently made without creating a hazard to personnel safety. Provide adequate space around the pump for servicing and maintenance.

Mount the pump on a rigid foundation, such as a concrete floor, and level with shims or by grouting. Mount the pump to the foundation ensuring not to put strain or twist in the pump housing. See Figures 6, 7 and 8 for foundation mounting dimensions. The pump should be mounted to the floor using the four (4) pre-drilled mounting holes in the pump base.

Remove the protective caps/covers from the inlet and exhaust flanges just prior to installing piping. If the pump is to be used in temperatures below freezing, drain the water jacket to prevent cracking the housing; blow out the water jacket. If the unit will be stored for a period of time before commissioning, follow the same procedure.

WARNING

When positioning the pump use suitable lifting equipment t o p revent injury to personnel. Ensure that the system is not lifted by the motor eye-bolt, as the motor eye-bolt is not intended to lift the suspended weight of the system. Injury to personnel and/or damage to equipment can result. Refer to Section 2 for pump mass information.

WARNING

Use suitable lifting equipment to move the pump. Refer to Section 2 for pump mass information.

Installation

S149-01-880 Issue F

3.5 Inlet piping

CAUTION

Ensure the system to be evacuated and connecting lines are clean and free of weld splatter, dirt or grit. Foreign debris entering the pump can cause failure and possibly damage the internal parts. Adequate traps, filters or screens should be permanently installed if the potential for particles greater than 0.25 mm (10 microns) are anticipated on entering the pump. Oil purification is required if a significant amount of particles greater then

0.25 mm (10 microns) are pumped. The inlet pressure must not exceed 1.013 bar (760 Torr).

All pipe lines should be as short as possible and be no smaller than the inlet to the pump. If long lines can not be avoided, increase the pipe diameter by 50 % or more over the pump inlet diameter. Conductance of long lines must be checked and the line sized large enough, or pumping speed of the system will be negatively impacted. When connecting the pump to the system, provide a vertical pipe at least 610 mm (24.0 inch) long between the pump and the system if the pump inlet is located below the system inlet. If the pump is located above or level with the system inlet, provide an inverted “U” pipe to serve as a trap for system dirt and prevent migration of pump oil toward the system inlet. Ensure all vacuum piping connections are tight. If an inline filter is being used, install according to

Figure 9. It is advisable to install a flexible connection between pump inlet and vacuum piping to reduce vibration

(See Figure 10). A full-opening high vacuum valve is recommended to facilitate start-up and for checking the pump blank off pressure.

WARNING

Inlet vacuum piping should be adequately supported. Ensure the piping is secured and will not cause a trip hazard.

S149-01-880 Issue F

Edwards and the Edwards logo are trademarks of Edwards Limited.

Installation

Figure 9 - Inlet piping configurations

3.5.1 Vacuum access port locations

Vacuum access ports are conveniently located on the pu mp and provide 6.4 mm (1/4 inch) or 12.7 mm (1/2 inch) access (Refer to Figure 2 items 7 and 11, Figure 3 items 7 and 12, and Figure 4 items 6 and 19). The pipe plugs can be replaced with a small vacuum ball valve to which a gauge can be connected. If a McLeod gauge is used, a synthetic, thick-wall, smooth-bore tubing such as Tygon should be used for a flexible conn ection. The gauge shou ld be loca ted approximately 610 mm (24.0 inch) above the port to prevent oil from entering the gauge.

1. Microvac pump

2. Close/long radius elbow

3. Flexible connector

4. In-line filter

5. V acuum break valve

6. System

Installation

S149-01-880 Issue F

3.6 Exhaust piping

CAUTION

Do not place a valve in the exhaust line. If a valve must be installed in the line, a relief valve must also be inserted between the reservoir and the valve. The relief valve should be equal in size to the line, and set to open at 138 mbar (2 psig).

The pumps emit tiny oil droplets into the exhaust of the pump. Edwards recommends the use of exhaust filters to prevent these droplets from accumulating in the exhaust piping of the system or where the piping terminates. The oil and condensables will coalesce inside the piping and return to the pump reservoir or be collected inside the filter housing.

For all 149-H/149-HS and those 212-J and 412-J pumps that do not use an exhaust filter, it is recommended that the exhaust be piped horizontally a short distance and tied into a vertical exhaust pipe. The lower vertical exhaust pipe must be at least 305 mm (12 inch) long and terminated with a plug or drain cock to allow removal of moisture and/ or contaminated oil before it can sufficiently accumulate and drain back into the pump oil reservoir (See Figure 10).

For 212-J and 412-J pumps with an exhaust filter, the vertical collection pipe is not required. These filters collect the coalesced oil and condensables inside the filter housing. The housing must be drained of fluids using the drain cocks. Failure to drain the oil from exhaust filters will result in decreased pump performance and significantly increased back pressure.

The exhaust pipe should be no smaller than the pump exhaust outlet and sized as short as possible. Pump exhaust will contain a small amount of oil and should be handled in a manner consistent with applicable federal and local regulations. If exhausted outside the building, point the end of the exhaust pipe downward to prevent the entrance of rain water.

Oil mist separators are available from Edwards which can eliminate oil fog in the majority of applications. The separator will not remove noxious or toxic gases and must be run to a suitable trap. Consult Edwards for recommendations.

WARNING

Do not block the exhaust of the pump. If this happens, damage to the equipment and injury to personnel can result.

WARNING

Vacuum piping should be adequately supported. Ensure the piping is secured and will not cause a trip hazard.

WARNING

The pump exhaust pressure must not exceed 483 mbar (7 psig). If this happens, damage to equipment and injury to personnel can result.

WARNING

Remove the plastic plug from the exhaust port prior to operating the pump. The pump must not be operated unless it is installed in an appropriate vacuum system.

WARNING

Exhaust filters fitted to 212-J and 412-J pumps must be drained to prevent hazardous back pressure from developing. Increased back pressure can result in damage to the pump and injury to people.

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Installation

Figure 10 - Exhaust piping

3.7 Electrical connections

CAUTION

Ensure proper voltage, starters and overloads are supplied to the motor, and proper voltage supplied to the solenoid coil. The pump and/or solenoid may fail to operate if voltage is less than 90 % of rated.

The pump electrical schematic is shown in Figure 11. Install a motor starter with safety device within easy reach of the operator. Connect the solenoid valve(s). Connect the motor so that the pump shaft rotates clockwise when viewed from the drive end. See Section 4.1 for

pre-start check procedures.

WARNING

Install electrical cables while ensuring not to create a trip hazard that could result in injury to personnel.

WARNING

Installation of the electrical connections should be performed by a competent technician familiar with vacuum systems, pumps and controls. The system should be wired as to not create a hazard due to power loss or re-initializing the pump after a power loss. If a power loss occurs, the system should have a manual reset for controls before restart.

1. Microvac pump

2. Vent pipe

3. Drain cock

Installation

S149-01-880 Issue F

Figure 11 - Electrical schematic

LLeg FFuse MMotor contactor M Aux In-line filter OL Overload CV Solenoid valve

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Installation

3.8 Cooling

CAUTION

Do not start the pump if the oil temperature is below 13 °C (55 °F).

The Microvac pump is water cooled and must be connected to a water supply. The 1/2 inch NPT water inlet connection is located in the pump housing on the drive side near the bottom (Refer to

Figure 2 item 4, Figure 3 item 6, and Figure 4 item 16).

Insert a valve in the water inlet line to regulate water flow so that the temperature of the oil in the reservoir is 6071°C (140-160°F). Oil temperature kits are available that automatically control the water flow to maintain the proper oil temperature (Contact Edwards for additional information). If the pump is located outside a building and subjected to freezing temperatures, the pump water jacket should be drained or filled with anti-freeze.

The 1/2 inch NPT water outlet is located in the pump housing (Refer to Figure 2 item 12, Figure 3 item 5, and Figure 4 item 11).

The water outlet should be connected to an open drain to permit the operator to check the flow and temperature of the outlet water periodically. There should not be a valve or back pressu re in the d ra in lin e. I n some cas es, co olin g water must be discharged to a pressure drain. In such cases , discharge pressure must not exceed 2.41 bar (35 psig) and no block valve should be placed in discharge line unless a 2.41 bar (35 psig) relief valve is provided to protect pump from high inlet pressure.

Note: If condensables are present in the pr ocess gas and gas ballast is operating, the cooling water supp ly should

be adjusted to raise the operating temperature to the level for gas ballast (Refer to Section 4).

3.9 Pump lubrication

The performance of this pump depends largely on the type of oil used. An initial charge of oil is included with each pump. This standard oil is V-Lube F which is recommended for general operating conditions in a relatively clean environment. V-Lube F is a multi-grade petroleum oil fortified for oxidation protection, containing detergent dispersants with excellent flow characteristics at low temperature.

If the pump is to be operated at vacuum levels that cause the oil temp erature to exceed 71 °C (160 °F) for extended periods of time, a heavier grade oil should be used. Stokes V-Lube G is available for oil temperatures up to 94 °C (200 °F).

Special operating conditions may require the use of special oils. Consult Edwards for specific recommendations when other than regular petroleum oils are being used.

WARNING

The temperature of the external pump surfaces can exceed 70 °C (160 °F) and cause injury to personnel. Hot surfaces can be found where the pump lubricant is located.

Installation

S149-01-880 Issue F

3.9.1 Initial oil fill

CAUTION

Starting the Microvac pump when the oil temperature is below 13 °C (55 °F) can result in excessive wear and galling damage to the moving parts.

The Microvac pump is shipped with an initial charge of oil; 10 liters (2.5 gallons) for the 149-H/149-HS, 15 liters (4.0 gallons) for the 212-J; and, 45 liters (12 gallons) for the 412-J. Before connecting the suction manifold, slowly rotate the pump through two (2) revolutions. This will distribute the oil throughout the pump interior.

WARNING

The oil fill plug on the top of the pump serves a dual purpose. It is an oil fill port and an overpressure device that opens at between 8 and 14 psig. This device is to protect the pump from oil box over-pressure and possible side cover fracture. The 412J pumps are fitted with two oil fill plugs, ensure at least one of these is free from obstruction i.e. not connected to anything.

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Operation

S149-01-880 Issue F

4 Operation

4.1 Pre-start check

CAUTION

If the paddle wheel does not rotate, stop the pump immediately. Check the operation of the solenoid. If the solenoid is operating correctly, check the oil lines for blockage.

Note: Momentarily jog the pump for at least two revolutions.

Jog the motor momentarily while observing pump rotation. If the pump does not rotate in a clockwise direction, interchange any two of the three-phase leads.

Ensure the oil solenoid valve operates properly by checking the oil flow indicator. The paddle wheel should rotate after system pressure is below 600 mm Hg (6 inch Hg at inlet). Solenoid operation is also apparent as it will create a magnetic field and become warm.

The oil solenoid valve is normally closed and must be energized when the pump starts. The pressure differential between the oil reservoir (atmospheric press ure) and the pump cavity (vacuum) forces th e

oil to the bearings and into the pump cavity. The oil lubricates the moving parts and al so creates an oil seal. Oil starts to flow at 800 mbar (600 Torr). At 533 mbar (400 Torr) the flow is approximately 50 %. From 133 mbar (100

Torr) to blank-off, flow is 100 %.

Note: 533 mbar (400 Torr) must be reached within 10 minutes or a force-feed lubrication system is required to

provide adequate oil flow to the pump cavity.

4.2 Pump start

CAUTION

Do not start the pump if the oil temperature is below 13 °C (55 °F).

Note: New belts usually lose some tension during initial operation and should be re-checked during the first few

days of operation. Always tension the belts according to the specifications of the belt manufacturer. Excessive tension can induce unnecessary loading on the blower bearings, while extrem e over-tensioning may cause the shaft to break as a result of fatigue.

1. Turn on the cooling water supply.

2. Ensure the equipment being evacuated is properly cleaned and all vacuum breaks are closed.

3. Depress the START button and check the solenoid valve for proper operation.

4. Open the pump inlet valve.

WARNING

Solenoid may become hot during operation.

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Operation

4.3 Gas ballast operation

CAUTION

When opening gas ballast valve, do not open past third marking on valve stem (See Figure 12).

Open the gas ballast valve for maximum efficiency. Adjust the ballast by turning the valve for desired rate. Full gas ballast will cause pump temperature to rise and is normal. For maximum effe ct of gas ballast, pump should operate at approximately 71 °C (160 °F). The operating temperature can be raised by throttling the cooling water. Consult Edwards for available oil temperature control kits.

If pumping water vapor in excessive quantities, the oil may become contaminated. The oil can be puri fied by running the pump with full gas ballast while the pump is is olated from the system. When excessive contaminants are present, indicated by high oil level, or thinning, formation of varnish, etc., the oil should be replaced.

Note: For dirty applications where condensable contaminants (asphalt, pitch, epoxies, etc.) other than water

vapor are present, the pump should be operated near 71 °C (160 °F).

Switch on inert gas purge to remove air from the pump and exhaust pipeline before the process starts.

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

(publication number P300-20-000), available from Edwards or the supplier.

z The gas ballast check valve should be inspected every six months for wear or a broken spring when operating

on an eight (8) hour a day basis; 3 months for twenty-four (24) hour a day operation.

z The gas ballast valve should be closed when the pump is stopped. If the valve is open, gas will be drawn into

the pump through the check valve and the vacuum manifold will be pressurized with atmospheric air. If desired, a solenoid valve attached to the gas ballast inlet and electrically connected to the motor leads can be used to turn off the gas ballast automatically on pump shutdown. Contact Edwards for additional information.

Figure 12 - Gas ballast setting

z When a pressurized gas is used to ballast the pump, the pressure must be reduced to 2 psi maximum. The use

of higher pressures may damage the pump.

z Opening the gas ballast slightly will quiet discharge valve noise when the pump is blanked off, but will

prevent reaching the lowest ultimate pressure.

Operation

S149-01-880 Issue F

z To maintai n a low blank-off noise level on a continuous basis, the valve se al washer can be removed from the

valve stem. This will provide a small amount of ballast at all times even when the valve is fully closed. It will also break vacuum when the pump is stopped. If the vacuum break is not permissible, solenoid valves may be installed. With the washer removed and with the gas ballast valve close d, blank-off pressure will be approximately 200 microns. The seal washer can be reinstalled when b allast on a continuous basis is no longer required. Care should be taken not to damage the seal washer if reinstallation is anticipated.

4.4 Pump stop

z Close the inlet valve to system. z Stop the motor and break vacuum unless system dictates otherwise.

Note: The oil solenoid valve closes automatically when the pump is stopped or a power failure occurs. This will

prevent the pump and vacuum system from being flooded with oil.

4.5 Operating notes

If large amounts of air pass t hrough the pump, it may become warm and, under severe conditions, hot. This is not an indication of malfunction. The pump is designed for high vacuum work and should not be operated at pressures greater than 533 mbar (400 Torr) for more than 10 minutes or at intermediate vacuums for periods which cause oil temperature to exceed 93 °C (200 °F).

For optimum pump operation, the oil temperature in the oil reservoir shou ld be 60-71 °C (140-160 °F) with the pump operating on the system or process. Oil temperature can be measured by in sert ing a the rmome ter in t he fill ho le or by contact pyrometer on oil block n ear the solenoid. If the pump is to be operated with oil temperature in excess of 71 °C (160 °F), the use of a heavier viscosity oil is recommended (Refer to Section 3.9).

When starting the pump or handling large amounts of air, oil vapor in the form of smoke will be released from the exhaust. This is not an indication of trouble. The volume of smoke will decrease as the pressure in the system decreases.

Note: Edwards offers a closed type oil mist separator that will eliminate exhaust oil smog but still requires

exhausting to outside. Contact a Edwards representative for information.

If the pump has been shut down for an extended period of time, it will be necessary to turn the pump over at least two (2) revolutions by momentarily jogging before starting to insure the free movement of parts.

Low oil temperature can cause overloading when starting the pump and possibly prevent the pump from sealing. Microvac pumps should not be started when the oil temperature is below 13 °C (55 °F). Optimum operating oil temperature after starting is between 60-71 °C (140-160 °F). Opening the gas ballast valve will help to warm the oil. A water miser (Refer to Section 7.4) is recommended to automatically control the oil temperature. Contact a Edwards representative for information.

WARNING

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Maintenance

S149-01-880 Issue F

5Maintenance

5.1 Safety information

z Ensure that maintenance is performed by a suitably trained and supervised technician. Obey local and

national safety requirements.

z Ensure that the maintenance technician is familiar with the safety procedures which relate to the pump oil

and the products processed by the pumping system.

z Check that all the required parts are available and of the correct type before work is started. z Isolate the pump and other components from the electrical supply so that they cannot be operated

accidentally.

z Allow the pump to cool (so that it is a safe temperature for skin contact) before maintenance work is

started.

z Do not reuse O-rings and seals if damaged. z After maintenance is complete, recheck the direction of pump rotation if the electrical supply has been

disconnected.

z The pump and pump oil will be contaminated with the process chemicals that have been pumped during

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

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

pump has been heated to 310 °C (590 °F) and above. Fluorinated materials are safe in normal use but can decompose into very dangerous substances (which may include hydrofluoric acid) if heated to 310 °C (590 °F) and above. The pump may have overheated if it was misused or if it was in a fire. Health and Safety Data sheets for fluorinated materials used in the pump are available on request: contact Edwards or the supplier.

z If necessary, maintain the motor as specified in the manufacturers information supplied with the motor.

5.2 Leak detection

A leak test should be performed if ultimate vacuum cannot be achieved. A proper leak test will isolate sections of the piping until the leak-source is found. The standard vacuum piping is shown in Figure 13. The use of a leak detector will speed the process for detecting leaks. Contact a Edwards representative for information.

WARNING

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

S149-01-880 Issue F

Edwards and the Edwards logo are trademarks of Edwards Limited.

Maintenance

5.3 Maintenance plan

A typical maintenance plan for the Microvac pump is provided in Table 5.

Figure 13 - Typical vacuum system piping

Table 5 - Maintenance plan

Operation Frequency

Inspect oil level Daily Check operating temperature 60-71 °C (140-160 °F) Daily Replace oil Application dependent Inspect valve decks 6 months Inspect pulleys and belts 6 months Inspect gas ballast valve 6 months Inspect bearing condition 12 months Clean the motor and drive 12 months Inspect taper lock bushings on pulleys After break in and 12 months

1. Vacuum chamber

2. Roughing valve

3. Roughing line

4. Air inlet valve

5. Gauge port

6. Mechanical fore pump

7. Optional foreline valve connection location

8. Optional hold pump connection location

9. Gauge port

10.Vapour pump

11.Valve

12.Alternate chamber gauge port location

Maintenance

S149-01-880 Issue F

5.4 Oil change

z Lockout all energy sources connected to the pump and vent to atmosphere. z Review the process contaminants and select proper personal protective equipment (PPE) to protect against

media contact.

z Using the drain valve, drain the oil into a suitable container for disposal. Use on ly Edwards recommend ed oils

when refilling the pump. Refer to Section 2 for fluid type and quantities. Fill the pump until the sight glass reaches the 3/4 mark.

z Check the pump and system for potential hazardous conditions. Restore energy sources.

5.5 Oil level check

z Check oil level daily. The oil level should be at center of sight glass when the pump is off or in lower half

while pump is operating at high vacuum. The level will change depending on inlet pressure. In most cases, oil is added after operating the pump for a short period of time.

z To avoid the loss of oil out the fill hole, do not add oil to the pump when in operation.

Note: When pumping gases that contain water vapor, it may be necessary to remove the water that condenses in

the pump reservoir sump. Stop the pump and wait at least 1/2 hour for the oil and water to separate. Open the oil drain valve and drain water; clos e the valve whe n oil flow starts. The interval is p rocess depend ent and varies with the amount of water vapor and oil temperature. Operating the pump with the oil temperature near 71 °C (160 °F) will minimize formation of water but not eliminate it.

Water entrapped in the oil will decrease ultimate vacuum and increase pumpdown times. The pre se nce of wa te r i n the oil is evident by a milky appearance of the oil when running.

5.6 Valve deck maintenance

z Lockout all energy sources connected to the pump. z Drain the oil as described in Section 5.4. z Remove the reservoir cover, oil baffle, and each valve deck while being very careful not to drop any

hardware inside the pump.

z Replace worn valve deck or valve deck parts. Reinstall valve decks with new gaskets. Reinstall oil baffle with

new gasket.

z Reinstall oil reservoir cover. z Refill the oil as described in Section 5.4. z Check the pump and system for potential hazardous conditions. Restore energy sources.

WARNING

Oil will be hot if pump was just operating. Allow sufficient time for the pump to cool prior to changing oil.

WARNING

S149-01-880 Issue F

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Maintenance

5.7 Belt maintenance

z Lockout all energy sources connected to the pump and vent to atmosphere. z Remove the belt guard cover. z Test the belt tension with proper tester.

Note: New belts usually lose some tension during initial operation and should be re-checked during the first few

days of operation. Always tension the belts according to the specifications of the belt manufacturer. excessive tension can induce unnecessary loading on the pump and motor bearings, while extreme overtensioning may cause the shaft to break as a result of fatigue.

z Replace worn pulleys. z Replace all belts at one time when any one requires changing. Check tension frequently during the first few

days of operation. Never apply belt dressing. If customer supplied belt or pulleys are used, follow the manufacturer's recommended installation procedures.

z Reinstall belt guard cover. z Check the pump and system for potential hazardous conditions. Restore energy sources.

5.8 Drive belt tension

Remove the belt guard. At approximately the center of the span between drive and driven pulleys, apply force to the belt and ensure the resulting deflection provided in Table 6.

If necessary, adjust the tension by raising or lowering the nuts on the motor support jack screws. Tighten the jackscrew nuts securely after adjustment is complete.

Note: Maintenance of proper belt tension is important. Excessive over-tightening of the belts is harmful to the

shaft bearings, while under-tightening will allow the belts to slip.

5.9 Gas ballast check valve replacement

z Replace the gas ballast valve(s) every two (2) years, if gas ballast is used on a regular basis. z Lockout all energy sources connected to the pump. z Remove the stem valve. z Use an O-ring pick or suitable tool to pull out the gas ballast check valve. Replace the valve if the spring is

damaged or broken.

z Reinstall the stem valve. z Check the pump and system for potential hazardous conditions. Restore energy sources.

Table 6 - Belt tension

Pump Force Deflection

NPoundsmmInches

149-H/149-HS 13.3 - 22.2 3 - 5 11.0 7/16 212-J 13.3 - 22.2 3 - 5 11.0 7/16 412-J 22.2 - 31.2 5 - 7 13.0 1/2

Maintenance

S149-01-880 Issue F

5.10 Fitment or replacement of the motor (412J models only)

The following motors can be fitted to 412J Pump Modules with the Universal Motor Mounting Platform attached.

Note: This is valid for pump modules with a serial number above 076227658.

Figure 14 - Collar bolt positions and motor frame sizes

WARNING

A new safety review may be required following fitment of any motor. Particular attention should be made to the effectiveness of the drive guard to restrict finger access to the motor shaft and all other rotating parts.

Table 7 - Motors the can be fitted to 412J pump models

Motor Frame

Size

Line

frequency

Motor Pulley

Collar Bolt

Position

Platform

Nominal

Inclination

Drive Belt Size

Standard Pump

Article Codes

IEC D160M 50 Hz 6 inch A -0.5 º B105 (L=2720) 900412014501

60 Hz 5 inch B -4.1 º B105 (L=2720)

NEMA 215T 50 Hz 6 inch C -7.7 º B105 (L=2720)

60 Hz 5 inch C -3.0 º B105 (L=2720) 900-412-014

NEMA 254T 60 Hz 5 inch B -4.0 º B105 (L=2720)

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Maintenance

5.11 Fault finding

A list of fault conditions and possible causes is provided in Table 8. If unable to rectify the fault using the table, call your nearest Edwards Service Center for help.

Table 8 - Fault finding guide

Symptom Probable Cause Recommended Solution

Unsatisfactory V acuum at Pump Inlet Contaminated or insufficient oil. Check oil level; utilize gas ballast.

Drain and wipe out reservoir and valve chamber. Refill with proper oil.

Solenoid oil valve not operating properly or inoperative.

Check and if necessary, clean and/or replace solenoid valve or coil.

Intake flange or cover bolts are loose.

Tighten flange and side cover bolts at regular intervals.

Oil manifold or integral oil distribution leaking.

Tighten plugs and manifold screws.

Oil level sight glass leaking. Carefully tighten screws. Exhaust valve not sealing. Disassemble, clean and check all

parts thoroughly. Replace any damaged or worn parts.

Pump seizes or knocks excessively; internal parts severely worn or broken.

Disassemble piston assembly. Replace broken or worn parts.

Leakage in vacuum system. Check system as described in

Section 4.

Excessive Pump Noise Pump knocking abnormally. Knocking is normal at blank-off. Excessive Pump Noise Check oil level and oil solenoid valve

for proper operation.

Broken parts or foreign material in

the pump.

Disassemble and remove foreign

material in the pump.

Replace broken parts as required.

Pump seizure resulting from insufficient lubrication or presence of foreign material.

Check solenoid valve for proper

operation.

Disassemble and remove foreign

material. Ensure oil lines are not

clogged.

Smooth minor scoring with #500

emery cloth and wash thoroughly

then oil before installing. Note: a

certain amount of scoring to the

piston, cylinder and other parts

usually will not seriously affect the

vacuum obtainable so long as scoring

is not in a continuous gouge around

the circumference of the piston

surface.

Maintenance

S149-01-880 Issue F

Motor stops or will not start. Thermal overload units in motor

starter fail.

Check Capacity of thermal overload

units by comparing ampere rating on

motor nameplate with overload

table inside starter box. If necessary ,

use one (1) size larger than

standard.

Possible internal seizure. Disassemble and correct.

Pump does not turn when motor starts.

V-belts too loose. Tighten V-belts (see Section 5.8).

Cylinder flooded with excessive oil due to defective solenoid valve (Valve stuck in open position from previous shutdown, or foreign material in valve seat).

Turn pump over by hand to remove

excess oil. Disassemble valve, clean

and replace any worn parts. Check

solenoid.

Oil viscosity too high or oil temperature too low.

Change to lighter grade oil or warm

oil before filling pump (espec ially

with low ambient temperatures).

Pump should not be started when oil

temperature is less then 13 °C

(55 °F) (When using V-lube F).

Turn pump over by hand before

starting.

Pulley(s) not keyed to shaft. Ensure keys are in place and

pulley(s) properly tightened. Pump turns in reverse direction

when motor is turned off.

Gas ballast valve in open position on pump shut down.

Close gas ballast valve prior to pump

shut down. Atmospheric air prevents

reversing direction of pump piston

on pump shutdown. Oil will also be

prevented from back-streaming into

inlet piping.

Table 8 - Fault finding guide (continued)

Symptom Probable Cause Recommended Solution

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Storage and disposal

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6 Storage and disposal

6.1 Storage

CAUTION

Observe the storage temperature limits stated in Section 2. Storage below -30 °C (-22 °F) will permanently damage the pump seals.

Use the following procedure to store the pump:

z Purge the vacuum system and the pump with dry nitrogen and disconnect the pump from the vacuum system. z Shut down the pump as described in Section 4. z Disconnect the pump from the electrical supply. z Disassemble, clean and reassemble the pump. If the pump is to be stored for long periods, loosen the drive

belts and change the oil.

z Place and secure protective covers on the inlet and exhaust ports. z Store the pump in cool, dry conditions until it is required for use. When required, prepare and install the

pump as described in Section 3. If the pump will be subjected to temperatures below freezing, drain or add anti-freeze to the water jacket. If the pump will be stored for more than a year, the pump must be cle aned and overhauled before re-installation.

6.2 Disposal

Dispose of the pump or any components removed from it safely in accordance with local and national safety and environmental requirements.

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

Do not incinerate fluoroelastomer seals and O-rings.

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Spares and accessories

S149-01-880 Issue F

7 Spares and accessories

7.1 Introduction

Edwards products, spares and accessories are available from Edwards companies i n Belgium, Brazil, Canada, France, Germany, Hong Kong, Italy, Japan, Korea, Switzerland, United Kingdom, USA, and a worldwide network of distributors. The majority of these centers employ Service Engineers who have undergone comprehensive Edwards training courses.

Order spare parts and accessories from the nearest Edwards company or distributor. When ordering, provide the following information:

z Model and Item Number of equipment. z Serial number. z Item number and description of part.

7.2 Service

Edwards products are supported by a worldwide network of Edwards Service Centers. Each Service Center 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.

The local Service Center can also provide Edwards engineers to support on-site maintenance, service or repair of your equipment.

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

7.3 Spares

Refer to the Parts manual.

7.4 Accessories

The following is a list of accessories that can be purchased by cont acting Edwards.

Table 9 - Accessories

Accessories Item number

Oil mist separator (212-J) 900-291-J24 Oil mist separator (412-J) 900-291-J25 Water miser 900-412-124 Portable oil purifier Application dependant

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PFPE-prepared Microvac pumps

S149-01-880 Issue F

8 PFPE-prepared Microvac pumps

8.1 Summary

PFPE-prepared Microvac pumps are supplied prepared for use with Edwards PFPE mechanical pump oils, such as Fomblin YVAC 06/6 or Krytox 1506.

PFPE-prepared Microvac pumps are suitable for pumping high concentrations of oxygen. Edwards recommends referencing publication P300-20-000 (Vacuum Pump and Vacuum System Safety) before

installing and using a PFPE-prepared Microvac pump.

8.2 Installation

CAUTION

Never use hydrocarbon lubricants in a PFPE-prepared pump.

When filling the Microvac pump with oil (as described in Section 3), a suitable Edwards PFPE oil must be used. Hydrocarbon oil cannot be used.

8.3 Operation

Operation of a PFPE-prepared Microvac pump is as specified in Section 4, but take note of the warning above.

8.4 Maintenance

Take additional care if the pump (hence the PFPE oil) is suspected of overheating. Do not touch or inhale the thermal breakdown products of PFPE oil which may be present if the pump has been heated

to 260 °C (500 °F) and above. PFPE oils are safe in normal use but can decompose into very dangerous substances if heated to 260 °C (500 °F) and above. The pump may ha ve overheated if it w as mi sus ed, if it malfunctioned, or if it was in a fire. Material Safety Data Sheets for PFPE oils used in the pump are available on request: contact the supplier or Edwards.

Fomblin oil has different properties from other pu mp oils, therefore: If filling the PFPE-prepared Microvac pump wit h Fomblin oil, Edwards recommends to check for oil leaks, particularly

around the shaft seals. If an oil leak is detected, contact the supplier or Edwards for advice.

WARNING

PFPE-prepared Microvac pumps are suitable for pumping high concentrations of oxygen, but Edwards recommends that PFPE-prepared Microvac pumps not be used for the pumping of hazardous materials.

WARNING

Obey the safety instructions given below and take note of appropriate precautions. If not, injury to people can occur.

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Edwards Microvac 149-HS, Microvac 212-J, Microvac 412-J, Microvac 149-H Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual