Pfeiffer Vacuum UNO User manual

Rotary Vane Pumps

PD 0010 BE/C (0511)

UNO/DUO 250 A

Betriebsanleitung • Operating Instructions

Index

Modifications reserved

1. Safety Precautions .................................. 3

1.1. For Your Orientation........................................................... 3

1.2. Pictogram Definitions........................................................ 3

2. Understanding The Pumps...................... 4

2.1. Main Features..................................................................... 4

2.2. Differences Between The Pump Types.......................... 4

3. Installation ............................................... 5

3.1. Preparations For Installation............................................ 5

3.2. Pump Assembly And Location......................................... 5

3.3. Connecting The Vacuum Side.......................................... 5

3.4. Connecting The Exhaust Side.......................................... 5

3.5. Connecting To The Mains Power Supply....................... 6

3.6. Special Models................................................................... 9

4. Operations .............................................. 10

4.1. Filling Up And Checking The Operating Fluid.............. 10

4.1.2.Operating Fluid F5 ............................................................ 10

4.2. Switching The Pump ON And OFF................................. 11

4.3. Operating The Pump With Gas Ballast Valve.............. 11

4.3.1.Standard Model................................................................ 11

4.3.2 Corrosive Gas Model ....................................................... 11

4.4. Pumping Off Dry Gases................................................... 12

4.5. Pumping Off Vapours....................................................... 12

5. What To Do In Case Of Breakdown...... 12

6. Maintenance .......................................... 13

6.1. Changing The Operating Fluid........................................ 13

6.2. Cleaning The Oil Filter ..................................................... 13

6.3. Re-Setting The Silencer ................................................. 14

6.4. Cleaning The Gas Ballast Valve..................................... 15

6.5. Cleaning The Silencer..................................................... 15

6.6. Shutting Down For Longer Periods............................... 17

7. Service .................................................... 18

8. Technical Data ....................................... 19

8.1. Dimensions........................................................................ 20

9. Accessories............................................ 20

10. Spare Parts ............................................. 20

Declaration Of Contamination .................... 21

Declaration Of Conformity ........... (last page)

Page

Please note:

Current operating instructions are also available via

www.pfeiffer-vacuum.net.

Danger of damage to the pump or system.

CAUTION

☞Read and follow all the instructions in this manual.

☞Inform yourself regarding:

☞Hazards which can be caused by the pump;

☞Hazards which can arise in your system;

☞Hazards which can be caused by the medium being

pumped.

☞Avoid exposing any part of your body to vacuum.

☞Observe all safety and accident prevention regulations.

☞Check regularly that all safety requirements are being

complied with.

☞Do not carry out any unauthorised conversions or

modifications on the pump.

☞When returning the pump to us please note the shipping

instructions in Section 7.

1.1. For Your Orientation

Instructions in the text

➡Operating instructions: Here, you have to do something

Symbols Used

The following symbols are used throughout in the illustrations:

Vacuum-flange

Exhaust flange

Gas ballast

Power connection

Position-Numbers

Identical pump and accessory parts have the same position

numbers in all illustrations.

Danger of injury

from moving parts.

WARNING

Danger of personal injury.

WARNING

1. Safety Precautions

1.2. Pictogram Definitions

Important note.

☞

PLEASE NOTE

Danger of burns from touching hot parts.

WARNING

Danger of an electric shock.

WARNING

Danger of poisoning.

DANGER

2.1. Main Features

2. Understanding Pumps

2.2. Differences Between The Pump Types

Type Stage Nominal Attainable

flow rate Final Pressure

at 50 Hz (Total, without

Gasballast)

UNO 250 A one stage 267 m3/h < 5.0 •10-2 mbar

DUO 250 A two-stage 267 m3/h < 3.0 •10-3 mbar

The UNO 250 A is a single stage and the DUO 250 A is a two

stage rotary vane pump.

Special features:

– Pressurised oil lubrication

– Hydraulically controlled high vacuum safety valve

– Optional: Oil filter systems, Condensate separator,

Operational monitoring systems.

Proper Use

– Rotary Vane Vacuum Pumps may only be used to generate

vacuum.

– Installation, start-up, operating and maintenance

instructions must be observed.

– Accessories other than those named in this manual may

not be used without the agreement of Pfeiffer Vacuum.

Special Models

Helium tight model:

– Operating Fluid P3

– Leak rate < 1 •10-5 mbar l/s

– Additional radial shaft seal (total of 3) with sealing oil

chamber (oiler)

– Option: Special gas ballast valve for inert gas inlet (N2) to

prevent atmospheric air entering the system.

Korrosivgasausführung:

– Operating fluid F5

– Leak rate < 1 •10-5 mbar l/s

– Additional radial shaft seal (total of 3) with sealing oil

chamber (oiler)

– Vanes and sight glasses made from special materials.

– Option: Special gas ballast valve for inert gas inlet (N2) to

prevent atmospheric air entering the system.

Improper Use

The following are regarded as improper:

– The pumping of corrosive gases (except with corrosive

gas processes version).

– The pumping of gases which are contaminated with

particles, dust and condensate. Avoid condensation and

sublimation; take note to the vapour compatability.

– The pumping of explosive gases.

– Operating the pump in locations where there is an explosi-

on hazard.

– The Rotary Vane Vacuum Pumps may not be used for the

purpose of generating pressure.

– The pumping of liquids.

– Uses not covered above, and, in particular:

– Connection to pumps and units which is not permitted

according to their operating instructions.

– Connection to units which contain touchable and voltage

carrying parts.

Improper use will cause any rights regarding liability and

guarantees to be forfeited.

Rotary Vane Vacuum Pumps UNO 250 A, DUO 250 A

1 Vacuum flange,

2 Exhaust flange,

3 Motor,

5 Control voltage connection (for pump monitoring)

15 Casing

18 Baffle Plate

28 Support Stand

42 Operating fluid filler screw

43 Operating medium drain screw

44 Sight glass

45 Gas ballast valve, complete;

46 Screw plug

182 Pressure gauge

183 Cover for filter cleaning

205 Screw plug for adjusting the silencer

15 205 42 183 46 1 2 182 45

44 43 18 5 28 3

3.4. Connecting The Exhaust Side

Pressure can rise to dangerous levels in

exhaust lines.

Lay exhaust lines without built-in shutoff

devices. If a shut-off device is installed for

internal operating reasons or if there is a risk of

excess pressure developing in the lines, official accident

prevention regulations must be complied with.

The exhaust line diameter should not be less than 63 DN.

The line from the pump must be laid with a downward

gradient so that condensate is prevented from flowing back

into the pump. Otherwise a trap must be installed.

Auspuffleitung nicht kleiner als DN 100 von der Pumpe aus

fallend verlegen, damit kein Kondensat in die Pumpe

zurückläuft. Andernfalls Abscheider einbauen.

Der Auspuffdruck darf 1,5 bar nicht überschreiten.

Expelled gases and vapours can represent a

hazard to health and/or the environment.

For this reason the relevant regulations must

always be complied with when working with

toxic substances. Only officially approved filters

may be used for the separation of such substances. This also

applies when handling toxic or chemically unstable gases

and to gases susceptible to polymerisation or to the formation

of peroxide (see 9. Accessories).

WARNING

CAUTION

3. Installation

3.1. Preparations For Installation

Do not carry out any unauthorised conversions

or modifications on the pump.

Fill up with operating fluid before operating the

first time (included in a separate pack in the

delivery consignment). When transporting use

only the eyebolts provided for the purpose.

3.2. Pump Assembly And Location

➡Where stationary installation is involved, anchor the pump

on site.

➡Sight glass 44 on the front side must be visible and gas

ballast valve readily accessible.

When filled with operating fluid, do not tilt the

pump otherwise operating fluid could escape

via the exhaust opening.

➡When installing the pump in a closed housing, ensure

there is sufficient air circulation.

CAUTION

WARNING

3.3. Connecting The Vacuum Side

➡Keep the connection between the vacuum chamber and

pump as short as possible.

➡Remove all scaling and loose particles from welded lines

prior to assembly.

– To protect the pump, separators, filters and cooling traps

etc.(see Section 9. Accessories) can be fitted upstream of

the pump. However, the conductance value of the

accessory causes a reduction in volume flow rate.

Where rotary vane vacuum pumps are

anchored, no forces from the piping system

should be allowed to act on the pump.

Suspend, decouple or support all piping

concerned with the pump.

CAUTION

Maximum angle of inclination to each side 10Þ

Maximum erection height 2000 m N.N.

Ambient temperature maximum 40 °C and minimum 12 °C

Maximum relative humidity 85%

3.5. Connecting To The Mains Power Supply

Power connections must comply with local

regulations. Voltage and frequency information

given on the rating plate must correspond to

the mains voltage and frequency values.

When the electrical connections have been

completed, carry out the earthed conductor

test.

The pump must be disconnected from the power before

opening the terminal box.

When switching on for the first time, check the direction of

rotation:

Checking The Direction Of Rotation

Check the direction of rotation of the pump

before filling up with operating medium.

➡Remove blank flange on the exhaust flange,

– do not take off sieve strainer from vacuum flange 1 and

exhaust flange 2.

➡Switch on pump for a short time (max. 3 seconds).

Motor/motor fan must turn clockwise (see arrow P on

motor fan cover).

➡If direction of rotation is incorrect: Interchange two

phases on the connecting cable.

CAUTION

WARNING

Power section with motor to be protected

Checking The Direction Of Rotation

Three phase motors with PTC

Pumps fitted with these motors are used primarily in systems

or in closed rooms. The motors of these pumps are fitted with

three PTCs which are built into the stator windings. The

connection of a tripping unit will protect the pump against

overloading (see connection example).

Tripping unit:

PTC tripping unit with two switchover contacts at the output

manufactured by Ziehl, type MSR 220 F (see Section 9,

„Accessories“), AEG type TMA 4R or Siemens type 3 UN8 004.

F1 - F3

10 11

AC 220 ... 240 V

Us F4

UVW

A1 A2 T1 T2 Y2Y1 24 21 22 14 1211

2) 2) 1) 1) 1)

PP1008/k

T1...T3

Connection example for water cooled canned motors with Tripping unit (typ MSR 220 F, order no.: P 4768 051 FQ

USControl Voltage

S1 Pressure key „OFF“

S2 Pressure key „ON“

S3 Control switch (reset key)

K1 Motor contactor

F1 ... F4 Fuses

T1... T3 Temperature sensors

H1 Signal lamp

M Motor, 3-phase

1) Only for units with two relais

outputs

2) Only for type MSR

3) Only for order no. P 4768 051 FQ

Tripping Units Type MSR save the switch-off occuring on thermal overload and it is necessary to manually reset via the integrated key or via the

externally connected key S3 to switch back on. Switching on via the mains is automatically recognised as a reset.

Voltage see rating plate

The Three Phase Current Motor Circuit

The three phase motor winding consists of three identical

coils.

Delta Connection

The three coils are connected in series with the connection

point connected to the mains. The voltage of each coil is the

same as the mains voltage whereas the mains current is the

cube root of the coil current. Delta connections are denoted

by the symbol ∆∆.

The voltage between the mains supply lines is called mains

voltage. The mains current is the current which flows in the

supply lines.

Star Connection

The ends of the three coils are connected at the star center.

The terminal voltage is the cube root of the coil voltage; the

mains and the coil current are the same. Star connections are

denoted by the symbol Y.

A star connection three phase motor for 400 V mains voltage

has a coil voltage of 230 V.

W2 U1

V2 V1

W1 U2

L3 L2

W2 U2 V2

U1 V1 W1

L1 L2 L3

L3 L2

W2 U2 V2

U1 V1 W1

L1 L2 L3

Motor coil and connecting plate of Delta Connection Motor coil and connecting plate of Star Connection

Helium tight and corrosive gas models UNO/DUO 250 A

45 Gas ballast valve

118 Radial shaft seal

122 Armature

126 O-ring

128 O-ring

132 Support washer

133 Radial shaft seal

134 Double supporting ring

135 Spacer

136 Oiler

138 O-ring

168 O-ring

169 Locking screw for connecting the gas ballast valve

(when no valve is fitted)

45/169

122

132

133

135

126

128

118

134

136

168

138

Important: The instructions in 4.1.2. must be

observed when working with synthetic

operating medium F5.

CAUTION

Oiler 136 should always be filled to the half way

mark, maximum, (when the pump is cold); top

up as necessary. When the pump becomes

warm, the lubricant expands and can spill over

if the oiler is too full.

CAUTION

3.6. Special Models

Helium Tight Models

– Helium tight models are distinguished by their high level

tightness to the atmosphere.

– Helium tight models are operated, as standard, with opera-

ting medium P3.

– The rotor shaft is sealed with an additional radial shaft

seal. The cavity between the radial shaft seals 133 is filled

with operating medium and is supplied by the oiler 136.

– If the gas ballast valve 45 is not available, the opening

should be closed with the locking screw 169 or a special

gas ballast valve with dosing device and hose connection

for flushing gas is available (on request).

Corrosive Gas Models

– Corrosive gas models are manufactured with special

materials.

– The rotor shaft of both versions is sealed with an

additional radial shaft seal. The cavity between the radial

shaft seals 118 and 133 is filled with operating medium and

is supplied by the oiler 136.

– If the gas ballast valve 45 is not available, the opening

should be closed with the locking screw 169 or a special

gas ballast valve with dosing device and hose connection

for flushing gas is available (on request).

– Corrosive gas models are operated, as standard, with

synthetic operating medium F5.

4.1. Filling Up And Checking The Operating

Fluid

Standard version pumps are tested with opera-

ting fluid P3. Guarantees relating to attainment

of final pressures and trouble free functioning

apply only providing this operating fluid is used.

The delivery consignment contains sufficient operating fluid

for one filling (valid only for P3).

Pumps for special applications (e.g. for pumping corrosive

gases) can be operated with special operating fluids such as

F5 and other Pfeiffer Vacuum operating fluids. The use of

such operating fluids requires prior authorisation from the

manufacturer.

P3 must be disposed of in accordance with local waste dispo-

sal regulations.

➡Remove operating fluid filler screw 42.

➡Fill up with operating fluid included in the consignment

(only for P3); refer to rating plate for correct quantity.

➡Replace operating fluid filler screw 42; be careful with the

O-ring.

CAUTION

➡Check operating fluid level only when the pump is warm

and running and vacuum connection 1 and gas ballast

valve are closed.

➡The level of operating fluid must always be between the

top and the middle of the sight glass 44.

➡Topping up operating fluid is possible when the pump is

running and in final vacuum operations.

➡In non-stop operations check operating fluid daily,

otherwise whenever the pump is switched on.

4. Operations

Rotary Vane Vacuum Pumps UNO/DUO 250 A

1 Vacuum flange,

2 Exhaust flange,

3 Motor,

5 Socket for control voltage

15 Casing

28 Support stand

42 Operating fluid filler screw

43 Operating medium drain screw

44 Sight glass

45 Gas ballast valve, complete;

182 Pressure gauge

183 Cover for filter cleaning

15 42 1 2 182 45

44 43 18 5 28 3

Sight glass 44

Operating fluid

level for the first

filling and during

operation

4.1.2. Operating Fluid F5

Only the synthetic operating fluid F5 may be used for corrosi-

ve gas model pumps. The use of other operating fluid must be

cleared by the manufacturer.

When working with synthetic operating media,

the manufacturer’s directions must be

observed.

If ‘’F5’’ is heated above 250°C, toxis vapours

which can harm the airways are given off.

Do not allow ‘’F5’’ to come into contact with tobacco products

(danger of poisoning when ignited). The precautions

necessary in the handling of chemicals must be observed.

Operating fluids containing toxic or aggressive

substances require special treatment. The

instructions for handling such media must be

observed.

Never fill into pumps which contain mineral oil

residues.

If there is a noticeable loss of operating fluid,

the radial shaft seals should be checked.

If operating fluid is leaking out underneath the

casing 15 from the opening between the

support stand 28 and motor 3, the radial shaft

seal must be replaced. Please contact your local Pfeiffer-

Service (see Section 7.).

☞

PLEASE NOTE

CAUTION

DANGER

WARNING

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