Oerlikon TRIVAC NT 5 User manual

P/N
140 212
140 213
140 214
140 216
140 312
140 313
140 314
140 316
TRIVAC NT 5 / NT 10
Rotary Vane Vacuum Pumps
Operating Instructions 17200918_002_A1

Table of contents
217200918_001_A1 - 06/2008 - © Oerlikon Leybold Vacuum
Page
Important Safety Information 3
1 Description 6
1.1 Principle of Operation 7
1.2 Supplied Equipment 9
1.2.1 Notes on the Oil and How to Order 9
1.3 Technical Data 10
1.3.1 Motor Dependent Data 11
1.4 Ordering Information 13
1.5 Accessories 13
2 Transporting and Storing 14
3 Installation 15
3.1 Placement 15
3.2 Conforming Utilisation 15
3.3 Connection to the System 15
3.4 Electrical Connections 17
3.4.1 Pumps with AC motor 17
3.4.2 Pumps with Three-Phase Motor 18
4 Operation 19
4.1 Media Compatibility 19
4.2 Start-up 19
4.3 Operation 20
4.3.1 Pumping of Non-Condensable Gases and Vapours 20
4.3.2 Pumping of Condensable Gases and Vapours 20
4.3.3 Operating Temperature 20
4.4 Shutting Down/Shelving 21
5 Maintenance 22
5.1 Service at Oerlikon Leybold Vacuum 22
5.2 Maintenance Schedule (recommendation) 23
5.3 Checking the Oil Level 24
5.4 Oil Change 25
5.5 Cleaning the Inlet Screen 26
5.6 Disassembly and Assembly of the Internal Demister 27
5.7 Disassembly and Assembly of the Electric Motor 27
6 Troubleshooting 29
7 Wearing and Original Parts 31
8 Waste Disposal 31
EC Declaration of Conformity 32

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Important Safety Information
Indicates procedures that must be strictly observed to prevent hazards to
persons.
Indicates procedures that must strictly be observed to prevent damage to, or
destruction of the equipment.
The TRIVAC NT 5/10 pumps from Oerlikon Leybold Vacuum have been
designed for safe and efficient operation when used properly and in
accordance with this manual. It is the responsibility of the user to carefully
read and strictly observe all safety precautions described in this chapter
and throughout the manual. This product must be ooppeerraatteeddaannddmmaaiinnttaaii--
nneeddbbyyttrraaiinneeddppeerrssoonnnneelloonnllyyiinntthheepprrooppeerrccoonnddiittiioonnaannddaassddeessccrriibbe
eddiinn
tthheesseeOOppeerraattiinnggIInnssttrruuccttiioonnss. Consult local, state, and national agencies
regarding specific requirements and regulations. Address any further
safety, operation and/or maintenance questions to your nearest Leybold
Oerlikon Vacuum office.
Failure to observe the following precautions could result in serious per-
sonal injury:
■Before beginning with any maintenance or service work on the TRIVAC
NT, disconnect the pump from all power supplies (lockout/tagout).
■Do not operate the pump with any of the covers removed. Serious injury
may result.
■If exhaust gases must be collected or contained, do not allow the exhaust
line to become pressurised.
■Make sure that the gas flow from the exhaust port is not blocked or
restricted in any way.
■The standard version of the TRIVAC NT is not suited for operation in
explosion hazard areas.
■Before starting up for the first time, the motor circuit must be equipped
with a suitable protective motor switch. Please take note of the informati-
on in these Operating Instructions and on the electric motor (wiring dia-
gram).
■The TRIVAC NT pumps including the accessories are fundamentally not
suited for pumping of combustible and explosive gases or vapours.
Mixtures of substances may, regarding the fire and explosion risk be criti-
cal or uncritical. The operating company is under the commitment to ana-
lyse this and rate the hazard potential accordingly so as to therefrom deri-
ve the necessary safety measures which must be introduced.
■When pumping toxic, chemical, radioactive and corrosive gases as well as
pyrophorous substances, the operating company is under the obligation
to comply with the national and international safety regulations and guide-
lines. Regarding the suitability of the TRIVAC NT pumps for special appli-
cations in which such gases, respectively substances shall be pumped,
Oerlikon Leybold Vacuum should be consulted first.
Safety information
Warning
Caution
Warning

■Avoid exposing any part of the human body to the vacuum.
■Never operate the TRIVAC NT without a connected intake line or without
fitting a blank flange.
■The location at which the TRIVAC NT (including its accessories) is opera-
ted should be such that angles over 10° from the vertical are avoided.
■The location of the TRIVAC NT should be such that all controls are easily
accessible.
■Under certain ambient conditions the TRIVAC NT may attain a temperatu-
re of over 70 °C (158 °F). There then exists the danger of receiving burns.
Note the symbols on the pump pointing to the hazards, and in the case of
a hot pump wear the required protective clothing.
■All work on the pumps “at operating state temperature“ shall only be done
while wearing protective gloves. Always let the pump cool down before
any servicing and maintenance work.
■The noise level produced by the TRIVAC NT is 49 dB(A) max.
Suitable hearing protection measures must be introduced.
■Before pumping oxygen (or other highly reactive gases) at concentrations
exceeding the concentration in the atmosphere (> 21 % for oxygen) it will
be necessary to use a special pump. Such a pump will have to be modi-
fied and de-greased, and an inert special lubricant (like PFPE) must be
used.
■Before operating the TRIVAC NT check first compatibility with the pumped
media so as to avoid hazardous conditions during operation right from the
start. Observe all applicable safety standards and regulations.
■After a mains power failure the pump will run up automatically again. This
also applies in the case of an emergency shutdown. In order to prevent
the pump from running up automatically again, the pump must be integra-
ted within a control arrangement such that it can only be switched on
manually again after the mains power has returned.
■When operating the pumps at gas throughput, it is urgently recommen-
ded to connect an exhaust filter or use a suitable exhaust line. Here, the
exhaust line must slope down and away from the pump.
■When moving the TRIVAC NT always use the allowed means. A lifting eye
is provided as standard on the pump.
■The pump when filled with oil must only be moved in its vertical position.
Spilled oil involves the risk of falling.
Safety information
417200918_001_A1 - 06/2008 - © Oerlikon Leybold Vacuum
Warning

Failure to observe the following precautions could result in damage to
the pump.
■Do not allow the ingestion of small objects (screws, nuts, washers, pieces
of wire, etc.) through the inlet port. Always use the inlet screen which is
supplied with every pump.
■Do nnoottuse the pump for applications that produce abrasive or adhesive
powders or condensable vapours that can leave adhesive or high viscosi-
ty deposits. Please contact our Sales or Service offices to select a suita-
ble separator. Also please contact Leybold Sales or Service when plan-
ning to pump vapours other than water vapour.
■This pump is suited for pumping water vapour within the specified water
vapour tolerance limits.
■Avoid vapours that can condense into liquids upon compression inside
the pump, if these substances exceed the vapour tolerance of the pump.
■Before pumping vapours, the TRIVAC NT should have attained its opera-
ting temperature. The pump will have attained its operating temperature
about 30 minutes after starting the pump. During this time the pump
should be separated from the process, by a valve in the intake line, for
example.
■In the case of wet processes we recommend the installation of liquid
separators upstream and downstream of the pump as well as the use of
the gas ballast.
■The exhaust line should be laid so that it slopes down and away from the
pump so as to prevent condensate from backstreaming into the pump.
■The entry of particles and fluids must be avoided under all circumstances.
■Reactive or aggressive substances in the pump chamber may impair the
operating oil or modify it. In addition, such substances may be incompa-
tible with the materials of the pump (Viton, grey cast iron, aluminium,
steel, resins, glass etc.).
■Corrosion, deposits and cracking of oil within the pump are not allowed.
■Normal amounts of humidity within the range of the pump’s vapour tole-
rance will not significantly affect pump performance (when the gas ballast
is active).
■In the case of custom pumps (with part numbers deviating from those
stated in the EC Declaration of Conformity) please note the information
provided in the supplementary sheets.
We reserve the right to modify the design and the specified data. The illustra-
tions are not binding.
Safety information
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Caution

Description
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1 Description
The TRIVAC NT are dual stage oil sealed rotary vane vacuum pumps.
The number in the designation of the pump indicates the pumping speed of
this pump in m3· h-1.
These pumps are capable of pumping gases and vapours out of vessels and
vacuum systems down into the medium vacuum pressure range. The stan-
dard pumps are not designed to handle oxygen at concentrations exceeding
the concentration of oxygen in the atmosphere. Moreover, these pumps are
not suited for pumping of hazardous gases or extremely aggressive or corro-
sive media. If in doubt please consult Oerlikon Leybold Vacuum.
The drive motor of the TRIVAC NT is screwed directly to the bearing piece.
The shaft of the pump and the shaft of the motor are linked by a coupling
piece. The bearings in the inner pump body are force-lubricated sliding bea-
rings.
The oil sight glass for viewing the minimum/maximum oil level and the oil
drain as well as the name plate are located on the front of the pump.
The connection components, the gas ballast knob and the oil fill are located
on the top of the pump.
Fig. 1 TRIVAC of the NT series
1 Intake port
2 Oil drain
3 Oil sight glass
4 Oil fill
5 Exhaust port
6 Gas ballast valve
7 Mains power connection
1
2
7
3
4
5
6

1.1 Principle of Operation
The rotor (2/6) which is eccentrically arranged in the pump housing (pump
chamber) has two radially sliding vanes (2/7 and 2/9) which divide the pump
chamber of the pump into several chambers.
The volume of each chamber changes periodically with each turn of the rotor
so that the gas at the intake port (2/4) is sucked in. The gas enters the pump
chamber, and after the admission aperture has been sealed off by the vane,
the gas is compressed and moved on.
The compressed gas is ejected from the pump chamber through the exhaust
valve. Oil which is entrained in the gas is roughly separated by an internal
demister and at the same time any mechanical contaminations are also
removed from the oil. The gas exits the pump through the exhaust port.
Oil injected into the pump chamber serves the purpose of sealing and lubri-
cation. The knocking noise (oil slap) which normally occurs when the pump
approaches its ultimate pressure is avoided by injecting a small amount of air
into the oil so that a silencing effect is attained.
Description
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B
G
0
1
2
3
Fig. 2 Operating principle of a TRIVAC NT 5 (other TRIVAC NT types operate in a similar way)
1 Gas ballast valve
2 Gas ballast inlet
3 Tandem valve (vacuum protection)
4 Intake port
5 Oil feed (oil pump)
6 Rotor
7 Vane (HV)
8 High vacuum stage (pump chamber)
9 Vane (FV)
10 Forevacuum stage (pump chamber)
11 Non-return valve
12 Diaphragm valve
13 Exhaust valve
14 Exhaust port
2
4
5
6
8
7
3
9
10
11
12
13
14
1

By opening the gas ballast valve (2/1) it is possible to admit a controlled
quantity of air (gas ballast) into the pump chamber while the compression
process is in progress. The gas ballast will prevent the condensation of
vapours within the pump up to the extent of the vapour tolerance levels as
stated in the specifications for the pump (these data refer to water vapour).
A special lubrication system with forced lubrication of the sliding bearings has
been developed to enable operation of the pump at intake pressures up to
1000 mbar.
An oil pump supplies the oil from the oil reservoir into a high pressure oil
system which in turn supplies all bearings. From here the oil enters the pump
chamber of the vacuum pump.
The oil pump is located in bearing piece of the high vacuum stage.
Separation of oil and gas in the pump involves two stages. First an internal
demister which is arranged ahead of the exhaust valve ensures the creation
of larger droplets.
Next these are returned back to the oil reservoir via a separation panel. This
ensures a minimal loss of oil.
This and the combination with the large usable oil reservoir, results in long
intervals between the oil exchanges, even at high intake pressures.
The gas ballast valve (GB) is opened or closed by turning it (positions 0, 1, 2, 3).
Description
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Fig. 3 Diagram for the lubrication system
1 Accessory
2 Bearing
3 Non-return valve
4 Pump chamber of the TRIVAC
5 Oil reservoir
6 Oil pump

GB position Explanation
0No gas ballast, maximum ultimate pressure
1For cleaning the pump’s oil at a good
ultimate pressure and low oil consumption
2Good water vapour tolerance
without producing excessive noise
3Maximum water vapour tolerance in
accordance with the technical data (Chapter. 1.3)
When the pump is at standstill (mains power failure, or when the pump is
shut down) the pump chamber is hermetically sealed off by two safety valves
(tandem valve and gas ballast diaphragm valve) which are controlled through
the oil pressure.
This reliably avoids any inadvertent venting of the vacuum chamber and the
backstreaming of oil.
1.2 Supplied Equipment
The TRIVAC NT is supplied with the following basic equipment:
• Pump with motor
• Separately included oil filling (see Chapter 1.2.1)
• Separately included inlet screen with O-ring
• Operating Instructions
The connection ports are provided with foil protectors for protection during
shipping.
The TRIVAC NT pumps having an AC motor are supplied ready for operation,
complete with switch, built-in thermal motor overload protection, mains cord
(1.8 m long) and a mains plug which depends on the country of use.
Exempt from this is the dual voltage motor for 110 V-120 V; 208 V-240 V.
The mains cord for this voltage range must be ordered separately, see
Accessories, Chapter 1.5.
The three-phase models do not come with the accessories needed for the
electrical connection. However, these accessories are available upon request.
1.2.1 Notes on the Oil and How to Order
Mineral oil is used as standard. If any other kind of special oil is being used,
this fact will be indicated by a sticker on the oil box stating the type of special
oil used.
Not all types of oil have been released for all pumps. You must only use
the kind of oil which has been specified for the particular pump.
Description
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Caution
Settings at the
gas ballast valve
Note

1.3 Technical Data TRIVAC NT 5 TRIVAC NT 10
Nominal pumping speed* 50/60 Hz m3· h-1 6/7.3 12/14.6
Pumping speed 50/60 Hz m3· h-1 5.2/6 9.9/11,3
Ult. partial pressure without gas ballast mbar 5 · 10-4 5 · 10-4
Ult. total pressure without gas ballast** mbar 2 · 10-3 2 · 10-3
Ult. total pressure w. gas ballast (stage 2)** mbar 3 · 10-2 3 · 10-2
Water vapour tolerance
Stage 1 mbar 10 10
Stage 2 mbar 30 20
Stage 3 mbar 40 30
Water vapour capacity g · h-1 150 210
(max. at stage 3)
Oil filling, min./max. l 0.75 / 1.25 0.75 / 1.25
Noise level * acc. to DIN 45 635, dB (A) 49 49
(without gas ballast)
Permissible ambient temperature °C 12 - 50 (EURO motor) / 12 - 40 (USA/Japan motor)
Motor power 50/60 Hz W 450/550 450/550
Speed 50/60 Hz min-1 1350/1650 1350/1650
Motor protection IP 54 54
Weight with operating agent ** kg 22.1 24.2
Connections, intake and exhaust DN 25 KF 25 KF
Dimensions mm see Figure 4 see Figure 4
* acc. to DIN 28 426 T1, ** acc. to DIN 28 400 ff, with 3-ph. motor
Description
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Only provided the lubricants recommended by us will we guarantee that
the pump will attain its specified technical data.
Caution

Description
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1.3.1 Motor Dependent Data
EURO motor 220-240/230 50/60 ± 5 % 450/540 2.5/2.4 10 54 1350/1650
World motor Δ200-240/ 50 ± 5 % 550 2.8 6 54 1500
Y 346/415 1.6
World motor Δ200-266/ 60 ± 5 % 650 2.8 6 54 1800
Y 346-460 1.6
Dual voltage 110-120/ 50/60 ± 5 % 490/550 6.8/5.6 10 54 1350/1650
motor (DV motor) 208-240 3.4/2.8
Japan motor 100 50/60 ± 5 % 540/630 8.4/7.2 10 54 1350/1650
EURO motor 220-240/230 50/60 ± 5 % 450/540 2.5/2.4 10 54 1350/1650
World motor Δ200-240/ 50 ± 5 % 550 2.8 6 54 1500
Y 346/415 1.6
World motor Δ200-266/ 60 ± 5 % 650 2.8 6 54 1800
Y 346-460 1.6
Dual voltage 110-120/ 50/60 ± 5 % 490/550 6.8/5.6 10 54 1350/1650
motor (DV motor) 208-240 3.4/2.8
Japan motor 100 50/60 ± 5 % 540/630 8.4/7.2 10 54 1350/1650
*the values stated for the fuses are recommended values only!
Values for up-front fuses for short-circuit protection. Please take note of the information provided by the manufacturers of contactors and motor protection switches.
Motors for Voltage Frequency Voltage Power Nominal Fuse* Protection Nom. speed
TRIVAC NT 5 [V][Hz]tolerance consumption [W]current [A][A]IP [min-1]
Motors for Voltage Frequency Voltage Power Nominal Fuse* Protection Nom. speed
TRIVAC NT 10 [V][Hz]tolerance consumption [W]current [A][A]IP [min-1]
Fig. 4 Pumping speed curves of the TRIVAC NT 5 and NT 10
10-4 2
10-1
Saugvermögen
Druck
h
3.
m
102
101
100
8
6
4
2
864
10-3 10-2 10-1 101 100mbar 103 102
-1
NT 10
NT 5
Pumping speed
Pressure

12 17200918_001_A1 - 06/2008 - © Oerlikon Leybold Vacuum
Description
Fig. 5 Dimensional drawing
A
E
F
DN DN
JLM
G
H
B
P
R
Q
NCD
Dim. Description NT 5 NT 10
A 1~, EURO 427 446
1~, DV motor 427 446
3~, World 427 446
1~, Japan 427 446
B 1~, EURO 233 233
1~, DV motor 251 251
3~, World 214 214
1~, Japan 233 233
C 1~, EURO 156 156
1~, DV motor 156 156
3~, World 156 156
1~, Japan 156 156
D 1~, EURO 174 174
1~, DV motor 156* 156*
3~, World 156 156
1~, Japan 178 176
E 195 195
F 100 100
G9589
H 198 198
J 259 259
L 210 210
M 208 208
N 147 147
P3434
Q 108 108
R 107 107
DN 25 25
* Capacitors in the junction box
DV = Dual voltage motor
(all dimensions are in mm)

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1.4 Ordering Information
P/N
TRIVAC NT 5 with 1~ Dual voltage-Motor 140 212
TRIVAC NT 5 with 3~ World motor 140 213
TRIVAC NT 5 with 1~ Euro-Motor 140 214
TRIVAC NT 5 with 1~ Japan motor 140 216
TRIVAC NT 10 with 1~ Dual voltage motor 140 312
TRIVAC NT 10 with 3~ World motor 140 313
TRIVAC NT 10 with 1~ Euro motor 140 314
TRIVAC NT 10 with 1~ Japan motor 140 316
1.5 Accessories
P/N
Horizontal inlet 140 102
Horizontal exhaust 140 103
Exhaust filter AF 8, DN 16 KF 190 50
Exhaust filter AF 10, DN 25 KF 190 51
Replacement filter elements FE 8 (pack of five) 190 80
Replacement filter elements FE 10 (pack of five) 190 81
Drain cock for exhaust filter AF 8/10 190 95
Condensate separator AK 8, DN 16 KF 190 60
Condensate separator AK 10, DN 25 KF 190 61
Oil drain cocks (for NT 5 / NT 10) 190 90
Manual oil return through GB inlet (kit for AF 8-16) ARM 190 93
Mains cord NEMA 100 V - 120 V 50/60 Hz 20081090
EUROSCHUKO 200 V - 240 V 50/60 Hz 20081091
NEMA 200 V - 240 V 50/60 Hz 20081141
The permissible motor voltage may deviate from the cable designation.
The motor voltage released and stated on the nameplate of the motor
applies!
Mineral oil 1 l 177 01
5 l 177 02
20 l 177 03
Use only types of oil specified by Oerlikon Leybold Vacuum.
Alternative oils are stated upon request.
The necessary connection components for connecting the exhaust filter and
the condensate separator in each case are stated in the following:
1 Elbow DN 25 KF 184 37
2 Centering rings with O-ring DN 25 KF 183 27
2 Clamping rings DN 25 KF 183 42
Description
Caution
Note

14 17200918_001_A1 - 06/2008 - © Oerlikon Leybold Vacuum
Transporting and Storing
2 Transporting and Storing
Pumps which are filled with operating agents must be only transported
standing upright. Otherwise oil may escape. Avoid any other orientations
during transportation.
Check the pump for oil leaks, there exists the risk of falling on oil spills.
To lift the pumps use only the lifting eye provided and the specified lifting
facilities.
Store the pump before using it again preferably at room temperatures (20
°C). Before storing the pump, properly separate the pump from the vacuum
system, purge it with dry nitrogen and change the oil.
Seal off the inlet and discharge openings of the pump with the transport
seals provided upon delivery of the pump.
Set the gas ballast switch to the position “0”.
When intending to store the pump for a longer period of time, place it in PE
bag. Add some desicccant (silica gel) into the bag and seal off the bag.
When having shelved the pump for more than one year, perform maintenance
on the pump and an oil exchange before recommissioning the pump. We
recommend to contact our service.
Caution
Warning

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Installation
3 Installation
3.1 Placement
The standard pump is not suited for placement in areas with explosive
atmospheres. Please contact us first when planning such an application.
The TRIVAC NT can be placed freely on a flat and horizontal surface.
The rubber elements under the pump’s base prevent the pump from slipping.
If the pump is to be permanently attached, this may be done by making use
of the holes in the rubber elements and a threaded bolt or similar.
The inclination of the pump (without additional fixing means) and with pos-
sibly attached standard accessories must not exceed an angle of 10°
from the vertical axis.
The rubber elements act as vibration absorbers. For this reason they must
not be compressed by the screws.
When installing the pump you must ensure accessibility of all connections
and controls.
Select a place for the pump which ensures a sufficient air circulation for coo-
ling the pump (keep front and rear sides unobstructed).
The ambient temperature around the pump should not exceed 50 °C (in the
case of USA and Japan motors 40 °C) and not drop below 12 °C (see
Chapter 4.3.3).
If required, the crane eye may be removed.
Before operating the pump, please check the oil level first.
3.2 Conforming Utilisation
The TRIVAC NT pumps are suited of pumping gases and vapours out of ves-
sels and vacuum systems down into the medium vacuum pressure range.
The standard pumps are not designed to handle oxygen at concentrations
exceeding the concentration of oxygen in the atmosphere. Moreover, these
pumps are not suited for pumping of hazardous gases or extremely aggressi-
ve or corrosive media.
3.3 Connection to the System
Before connecting the pump, the shipping seals on the connection flanges
(6/1 and 6/2) must be removed. If residues of adhesives are present on the
connecting flanges you must remove these using a suitable solvent like alco-
hol, for example.
Warning
Retain the transport
seals
Caution
Caution

16 17200918_001_A1 - 06/2008 - © Oerlikon Leybold Vacuum
Installation
Insert the inlet screen (6/8) with the O-ring (6/9).
The intake and exhaust lines are fitted with standard small flanges. The
connection flanges must be clean and undamaged.
The intake line and the exhaust line must be connected using corrugated
pipes or vacuum hoses so that no mechanical forces can be transferred
to the pump.
The intake line must be clean. Any deposits in the intake line will tend to
degas and impair the attainable vacuum pressures.
The cross section of the intake and exhaust line must at least be of the
same diameter as that of the pump connections.
An intake line which is too small in diameter will throttle the pumping
speed.
The pressure in the oil box must not exceed 1.5 bar (absolute).
An exhaust line which is too small in diameter or which is blocked can
result in the formation of overpressures within the pump. Possible conse-
quences can be a damaged or even burst open pump. For this reason
the exhaust line must be checked from time to time to ensure that there
are no obstructions.
Fig. 6 Connections and controls
11
1
2
1 Intake port
2 Exhaust port
3 Oil drain
4 Oil sight glass
5 Name plate
6 Oil fill
7 Gas ballast valve
8 Inlet screen
9 O-ring
10 ON/OFF switch
11 Mains connection 3
4
5
6
7
8
10
9
Caution
Warning

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When pumping vapours we strongly recommend the installation of a conden-
sate separator on the suction side and also on the exhaust side.
The exhaust line must be laid so that it slopes down and away from pump
(lower than the pump) to prevent any condensate from flowing back into
the pump. If a sloping line can not be installed, a separator must be fitted.
When the oil mist is to be removed from the exhaust gas flow we recom-
mend the installation of an exhaust filter.
When pumping inert gases the pump’s gas ballast inlet can directly be
connected to the system by an adaptor (for this the gas ballast knob must be
removed).
3.4 Electrical Connection
Risk of suffering injury!
During all electrical work ensure that the power supply lines have reliably
been switched off and protected against being switched on inadvertently
(tagout/lockout). The electrical connections may only be provided by a
trained electrician in accordance with EN 50110-1, for example.
In order to prevent the pump from running up unexpectedly after a power
failure, the pump must be connected to the system controller in such a
way that the pump may only be re-started manually. This applies equally
after the pump has been switched off through an emergency switch.
The pumps are supplied with either an AC motor or a three-phase motor.
3.4.1 Pumps with AC Motor
The pump may be directly connected via its mains cable and its plug to the
mains.
In the case of 230 V mains, 6 A slow blow or 10 A fast blow fusing is requi-
red as a minimum.
A check on the direction of rotation is not required since this is fixed.
The thermal motor overload protector protects the motor in case it is overloa-
ded.
The mains voltage must comply with the voltage stated on the name plate.
When the thermal motor overload protection system has switched the
motor off, the motor will automatically cut in again when the temperature
has dropped below the maximum permissible operating temperature.
Warning
Warning
Caution
Installation

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3.4.2 Pumps with Three-Phase Motor
The TRIVAC NT pumps equipped with a three-phase motor are delivered
without the components required for their electrical connection.
You must connect the pump using an appropriately rated cable (we recom-
mend: AWG 18 for the NT5 and NT10) and a suitably rated motor protection
switch. The value set on the motor protection switch must correspond to the
current rating stated on the name plate of the motor.
Shown in Fig. 7 is the way in which the pump having a three-phase motor
(50/60 Hz) may be connected in Star or Delta fashion. Please also take note
of the information given in the junction box or on the name plate of the
motor.
After having connected the motor and each time after having made a
change to the wiring you must check the direction of rotation.
For this switch the motor on briefly and determine whether or not a suita-
ble plate (a blank flange, for example) held in front of the intake is sucked
towards the pump’s body. If this is not the case you must interchange two
of the mains phases.
Note the direction indicating arrow on the fan cowl.
Installation
Caution
Fig. 7 Wiring diagram for the TRIVAC NT with 50 Hz three-phase motor
Delta circuit Star circuit
Voltage ranges for Max. current consumption Min. current Setting for the
the three-phase at an intake pressure of consumption at motor protection
motors about 300 mbar ultimate pressure switch (motor data)
50 Hz 200 V - 240 V 2.2 A - 2.6 A 1.6 A - 2.5 A 2.8 A
60 Hz 200 V - 266 V 2.5 A - 2.3 A 1.4 A - 1.9 A 2.8 A
Y 50 Hz 346 V - 415 V 1.2 A - 1.5 A 0.9 A - 1.4 A 1.6 A
60 Hz 346 V - 460 V 1.4 A - 1.35 A 0.8 A - 1.2 A 1.6 A
3.4.2.1 Current Drawn by the Three-Phase Motors of the TRIVAC NT 5 and NT 10

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17200918_001_A1 - 06/2008 - © Oerlikon Leybold Vacuum
Operation
4 Operation
4.1 Media Compatibility
Before pumping oxygen (or other highly reactive gases) at concentrations
exceeding that of the atmosphere (> 21 % for oxygen), it is necessary to
use a special pump. This special pump must be modified and degreased
and a special lubricant (like PFPE) must be used.
When pumping toxic, chemical, radioactive and corrosive gases as well as
pyrophorous substances, the operating company is under the obligation
to comply with the national and international safety regulations and guide-
lines. Regarding the suitability of the TRIVAC NT pumps for special appli-
cations in which such gases, respectively substances shall be pumped,
Oerlikon Leybold Vacuum should be consulted first.
The pumps are not suited for pumping liquids or very dusty media.
Corresponding protection facilities need to be provided.
The pump is as standard not suited for pumping hazardous gases or
vapours.
For inquiries, call our technical sales department.
4.2 Start Up
Check the oil level each time before switching on the pump.
When starting the pump up for the first time and each time changes are
made to the electrical power supply connection, check the direction of
rotation in the case of those pumps which are equipped with a three-
phase motor (in accordance with Chapter 3.4).
The pump is started up by operating the ON/OFF switch (6/10 - does not
apply in the case of pumps with a three-phase motor). The ON/OFF switch
may be operated at all pressures.
During initial start up and after a longer period during which the pump has
not been used, the pump may not immediately attain the specified ultimate
pressure because the oil has to be degassed first.
For this you should let the pump run for about 30 minutes with the intake line
closed and the gas ballast valve (6/7) open (position 2 of the gas ballast
valve).
Avoid exposing any part of the human body to the vacuum. There is the
risk of suffering injury. Never operate the pump with an open intake port.
Vacuum connections as well as oil feed and discharge openings must not
be opened while the pump is operating.
The pressure in the oil box must not exceed 1.5 bar (absolute).
An exhaust line which is too small in diameter or which is blocked can
result in the formation of overpressures within the pump. Possible conse-
quences can be a damaged or even burst open pump. Thus the exhaust
line must be checked from time to time to ensure that there are no
obstructions.
Warning
Warning
Caution

20 17200918_001_A1 - 06/2008 - © Oerlikon Leybold Vacuum
Operation
4.3 Operation
These pumps are capable of pumping gases and vapours. Vapours can only
be pumped provided the gas ballast valve is open and provided the pump
has attained its operating temperature.
The maximum vapour tolerance is attained when the gas ballast valve (6/7) is
set to position 3.
4.3.1 Pumping of Non-Condensable Gases and Vapours
In the presence of excess quantities of permanent gases the TRIVAC NT may
be operated without gas ballast (position 0), provided the saturation vapour
pressure at the operating temperature is not exceeded during compression.
If the composition of the gases which are to be pumped is not known and if
the possibility of condensation within the pump can not be excluded, we
recommend operation of the pump with the gas ballast valve open (in accor-
dance with Chapter 4.3.2).
4.3.2 Pumping of Condensable Gases and Vapours
With the gas ballast valve open and when the pump is running at its opera-
ting temperature, pure water vapour can be pumped up to the extent stated
in the technical data for the pump (position 3 of the gas ballast valve). When
the vapour pressure increases above the permissible level, the vapour will
condense in the oil of the pump. When pumping vapours make sure that the
gas ballast valve is open and that the pump has been running for at least 30
minutes with the intake line closed and with gas ballast.
It will be possible to pump vapours up to the permissible limit only after
the pump has reached its operating temperature.
During the pumping process vapours may dissolve in the oil of the pump.
This impairs the properties of the oil and there is the risk of corrosion wit-
hin the pump. For this reason the pump must not be switched off imme-
diately after termination of the process. The pump must remain on with
the gas ballast valve open and the intake line sealed until all vapours
which were dissolved in the oil have been removed.
We strongly recommend that the TRIVAC NT pumps be left running for
about 30 minutes after termination of the process.
In the case of cyclic or repetitive processes the TRIVAC NT should not be
switched off during the breaks between the individual work phases (low ener-
gy requirement when running at ultimate pressure). The gas ballast valve
should be opened and the intake line should be sealed (through a valve, if
possible).
When all vapours have been pumped from a process (drying, for example) the
gas ballast valve can be closed to improve the attainable ultimate pressure.
4.3.3 Operating Temperature
Proper operation of the TRIVAC NT is ensured at ambient temperatures bet-
ween 12 °C and 50 °C, with the exception of the pump models for the USA
and Japan where a range of 12 °C to 40 °C applies.
Caution