Greenco 1RV0020 User manual

Ii lEEN[O
1RV0160 11 RV0200 11 RV0250 11 RV0300
CE
1RV0020/1RV0025/1RV0040/1RV0063/1RV0100
Operating Instruction
Rotary Vane Vacuum Pump
Manufacturer
Zhejiang Greenco Industry Co Ltd

1
Table of Contents
Preface ...................................................................................1
Technical data........................................................................2
Principle of operation ..........................................................3
Oil Circulation......................................................................3
Cooling ................................................................................3
On/Off switch.......................................................................3
Safety......................................................................................3
Intended use .......................................................................3
Safety notes ........................................................................3
Emission of Oil Mist.............................................................4
Noise ...................................................................................4
Transport................................................................................4
Transport in Packaging . .....................................................4
Transport without Packaging . .............................................4
Storage...................................................................................4
Short-term Storage ..............................................................4
Conservation .......................................................................4
Installation and Commissioning . ........................................5
Installation prerequisites......................................................5
Mounting Position and space . ........................................5
Suction Connection.........................................................5
Discharge connection......................................................5
Electrical connection/Controls ........................................6
Installation ...........................................................................6
Mounting .........................................................................6
Connecting electrically ..................................................7
Connecting Lines/Pipes ..................................................7
Filling Oil .........................................................................7
Recording of Operational Parameters.............................7
Operation Notes ..................................................................8
Application ......................................................................8
Conveying Condensable Steams ....................................8
Maintenance...........................................................................8
Maintenance Schedule .......................................................8
Daily：............................................................................8
Weekly：.........................................................................8
Monthly ...........................................................................9
Every 6 Months: ..............................................................9
Yearly ..............................................................................9
Every 500 - 2000 Operating hours ..................................9
Every 16000 Operating hours, at latest after 4 Years:.....9
Checking the oil ..................................................................9
Checking the level...........................................................9
Topping up Oil .................................................................9
Checking the Colour of the Oil ........................................9
Oil Life ...............................................................................10
Oil and Oil Filter Change ...................................................10
Draining Used Oil..........................................................10
Flushing the vacuum pump ...........................................10
Cleaning of the float valve.............................................10
Replacing the Oil Filter..................................................11
Filling in Fresh Oil. ........................................................11
Exhaust Filter ....................................................................11
Check during operation .................................................11
Assessment ..................................................................11
Change of the exhaust filters ........................................11
Overhaul...............................................................................12
Removal from Service .......................................................12
Temporary Removal from Service .....................................12
Recommissioning..............................................................12
Dismantling and Disposal..................................................12
Troubleshooting..................................................................13
Exploded drawing ...............................................................17
Spare parts...........................................................................20
Wearing parts kit . ...............................................................21
Accessories.........................................................................21
Oil. ........................................................................................22
EC Declaration of Conformity ...........................................23
Introduction
Congratulations on your purchase of the Greenco vacuum pump. As the
global leader of the vacuum pump and pressure pump technology, Greenco
is always committed to meeting the demands of customers and OEM
manufacturers, and continuously delivering vacuum and pressure solutions
geared to the industry worldwide.
These operating instructions contain information for
—product description,
—safety instructions
—transport
—storage
—installation and commissioning
—maintenance
—overhaul
—trouble shooting
—spare parts
This operating manual covers the installation and operation of vacuum
pump, involving the transport, storage, installation, commissioning,
influence on operating conditions, maintenance, troubleshooting and
overhaul of the vacuum pump.
Prior to handling the vacuum system, these operating instructions
shall be read carefully and understood. If anything remains to be
clarified please contact Greenco !
Keep these operating instructions and, if applicable, other pertinent
operating instructions available on site.



Technical data
Product description
Use
The vacuum pump is intended for：the suction of air and other dry,
non-aggressive, non-toxic and non-explosive gases.
Conveying media with a higher density than air leads to an increased
thermal and mechanical load on the vacuum pump and is permissible only
after prior consultation with Greenco.
Theallowabletemperaturerangeoftheinletgascanbereferredto
in “Oil, Ambient temperature range”
In case the vacuum pump is equipped with a gas ballast (optional), water
vapour within the gas flow can be tolerated within certain limits (see
“Installation and Commissioning, Operating Notes, Conveying
Condensable Vapours”). The conveyance of other vapours shall be agreed
upon with GREENCO.
The vacuum pump is intended for the placement in a non-potentially
explosive environment.
The vacuum pump is equipped with float valve (200) and return oil pipe.
The vacuum pump is thermally suitable for continuous operation (100%
output).
The vacuum pump is provided with oil return valve (280).
Unit 1RV0020 1RV0025 1RV0040 1RV0063 1RV0100
Pumping rate
(50HZ/60HZ) m3/h 20/24 25/30 40/48 63/76 100/120
Pressure limit mbar 2.0 0.1 0.1 0.1 0.1
Motor power
(50HZ/60HZ) kW 0.75 0.75/1.1 1.1/1.5 1.5/2.2 2.2/3.0
Motor rotation speed
(50HZ/60HZ) min-1 3000/3600 1500/1800 1500/1800 1500/1800 1500/1800
Noise
(50HZ/60HZ) dB 67/70 62/64 64/67 64/66 65/68
Max. saturated
vapor pressure mbar 40 40 40 40 40
Removal rate of
vapor l/h 0.9 0.9 1.1 1.8 2.8
Operating
temperature
(50HZ/60HZ)
℃80/85 80/85 82/90 84/92 84/93
Ambient temperature ℃See Oil for vacuum
pump
See Oil for vacuum
pump
See Oil for vacuum
pump
See Oil for vacuum
pump
See Oil for vacuum
pump
Oil quantity L 0.45 1.0 1.0 2.0 2.0
Weight kg 20 34 38 55 73
abcd
e f
gh
i
a. Motor data
b. Terminal box
c. Lifting ring
d. Gas discharge
e. Gas inlet
f. Radial fan
g. Oil filter
h. Nameplate
i. Ball valve
j. Oil fill plug
k. Oil sight glass
l. Oil drain plug
k
e
ghij
l
f

3
The vacuum pump is applicable to continuous operation (Pay attentions to
precautions of oil circulation; see Oil Circulation in Page 3; see Oil return in
Page 8).
The vacuum pump is ultimate pressure proof.
Principle of operation
The vacuum pump works on the rotating vane principle.
A circular rotor (14) is positioned centrically on the shaft of the vacuum
pump. The shaft of the vacuum pump is driven by the drive motor shaft by
means of a flexible coupling (310).
The rotor (14) rotates in an also circular, fixed cylinder (1), the centerline of
which is offset from the centreline of the rotor such that the rotor and the
inner wall of the cylinder almost touch along a line. Vanes (22), sliding in
slots in the rotor, separate the space between the rotor and the cylinder into
chambers. At any time gas is sucked in and at almost any time ejected.
Therefore the vacuum pump works almost pulsation free.
In order to avoid the suction of solids, the vacuum pump is equipped with a
mesh screen (261) in the suction connection.
In order to avoid reverse rotation after switching off, the vacuum pump is
equipped with a non-return valve (257)
NOTE: This valve shall not be used as a non-return valve or shut –off valve
to the vacuum system and is no reliable means to prevent suction of oil into
the vacuum system while the vacuum pump is shut down.
In case the vacuum pump is equipped a gas ballast (optional):
Through the gas ballast valve (440) a small amount of air is sucked into the
pump chamber and compressed together with the process gas. This
counteracts the accumulation of condensates from the process gas inside
the vacuum pump (see “Conveying Condensable Steams” in Page 8).
The gas ballast is designed with paper filter (Note: 1RV0020-1RV0040 gas
ballasts are configured with sintered metal filters).
Gas ballast version with ball valve:
The gas ballast line can be closed partially or completely by means of a ball
valve.
In order to improve the operating characteristics the outlet of the pump
chamber is equipped with a discharge valve (159).
Oil Circulation
The vacuum pump requires oil to seal the gaps, to lubricate the vanes (22)
and to carry away compression heat.
The oil reservoir is located on the pressure side of the vacuum pump (i.e.
high pressure) at the bottom of the bottom chamber of the oil separator (75).
The feed openings are located on the suction side of the vacuum pump (low
pressure).
Forced by the pressure difference between pressure side and suction side
oil is being drawn from the oil separator (75) through the oil supply lines
(210) and injected on the suction side.
Together with the sucked gas the injected oil gets conveyed through the
vacuum pump and ejected into the oil mist separator (75). Oil that separates
before the exhaust filter (120) accumulates at the bottom of the bottom
chamber of the oil separator (75).
Oil that is separated by the exhaust filter (120) accumulates at the bottom of
the upper chamber of the oil separator (75).
The flow resistance of the exhaust filters (120) causes the inside of the
exhaust filters (which is connected to be bottom chamber of the oil separator)
to be on a higher pressure level than the outside of the exhaust filters (the
upper chamber of the oil separator). Because of the higher pressure in the
bottom chamber it is not possible to let oil that drips off the exhaust filters
simply flow down to the bottom chamber.
As the vacuum pump is equipped with float valve (200) and oil return pipe at
the inlet:
The oil accumulated in the upper chamber of the oil separator flows in the
air inlet (250) through the float valve (200) and oil return pipe (195)
As the vacuum pump is equipped with oil return valve (280):
In continuous operating conditions, it is possible that the oil sucked into
pump chamber accumulates at the bottom of the upper chamber of the oil
separator, and then drains out along with the gas discharge/pressure,
resulting in oil-free pump operation; therefore, turn off the vacuum pump
and wait for at least 15 minutes for every 10 hours’ continuous operation.
Depending on different working environments, the period of continuous
operation may be even shortened (See Operation Notes in Page 8). After
the vacuum pump is turned off, the pressure difference in and out of exhaust
filter (120) is zero. The pressure in both chambers of oil separator is
balanced. Open the oil return valve (280) between two chambers to drain
the oil accumulated in the upper chamber of the oil separator by gravity into
the bottom chamber.
Cooling
The vacuum pump is cooled by：
-the ambient air around the vacuum pump, including oil mist separator (75)
-he air flow from the fan wheel (400)
-the conveyed gas
-he air flow from the fan wheels (321) on the shaft of the vacuum pump
On/Off switch
The vacuum pump comes without on/off switch. The control of the vacuum
pump is to be provided in the course of installation.
Safety
Intended use
DEFINITION: For the purpose of these instructions, “handling” the vacuum
pump means the transport, storage, installation, commissioning, influence

on operating conditions, maintenance, troubleshooting and overhaul of the
vacuum pump.
The vacuum pump is intended for industrial use. It shall be handled only by
qualified personnel.
The allowed media and operational limits according to the “Product
Description” (page 2) and the “Installation Prerequisites” (page 5) of
the vacuum pump shall be observed both by the manufacturer and the
operator.
The maintenance instructions shall be observed.
Prior to handling the vacuum pump these operating instructions shall
be read and understood. If anything remains to be clarified please
contact Greenco company!
Safety notes
The vacuum pump has been designed and manufactured with the
state-of-the-art technology and latest safety standards. Nevertheless,
residual risks may remain in case of improper installation or use. These
operating instructions inform about potential hazards where appropriate.
Safety notes are tagged with one of the keywords DANGER, WARNING and
CAUTION as follows:
Emission of Oil Mist
The oil in the process gas is separated to the greatest possible extent, but
not perfectly.
Note：The possibly sensible smell is not caused by droplets of oil, though,
but either by gaseous process components or by readily volatile and thus
gaseous components of the oil (particularly additives).
Noise
The sound pressure level in free field is tested according to EN ISO 2151.
Transport
Caution：Empty vaccum pump can contain oil left from testing, so make sure
to keep vertical while transport and storage. Do not tilt or invert the vacuum
pump.
Transport in Packaging
Packed on a pallet the vacuum pump is to be transported with a forklift.
Transport without Packaging
In case the vacuum pump is packed in the carton package lined with internal
expanding lining：
Remove the lining out of the carton.
If the vacuum pump is lined with corrugated foil in the carton：
◆Remove the corrugated foil from the carton.
If the vacuum pump is wrapped in foam plastic in the carton：
Remove the foam plastic from the carton.
If the vacuum pump is secured on the base with bolts：
Unscrew the bolts between the pump and bolts.
If the vacuum pump is secured on the base with retaining tape：
Remove the retaining tape.
●Make sure the eyebolt (391) is intact (replace the damaged ones).
●Make sure the eyebolt (391) is reliably locked.
●Attach lifting gear securely to the eyebolt (391) on the cylinder.
●Attach lifting gear to a crane hook with safety latch .
●Lift the vacuum pump with a crane hook.
In case the vacuum pump was bolted to a pallet:
◆Remove the stud bolts from the rubber feet.
CAUTION
Do not walk, work or stand under suspended loads.
CAUTION！
The non-OEM spares market offers exhaust filters that are
geometrically compatible with GREENCO vacuum pumps, but do
not feature the high retention capacity of genuine GREENCO
exhaust filters.
Increased risk of damage to health .
In order to keep the emission on the lowest possible level only
genuine Greenco exhaust filters shall be used.
CAUTION！
Residual oil is present in gas discharged from vacuum pump.
Aspiration of gas conveyed by the vacuum pump over extended
periods can be harmful.
The room into which the gas conveyed by the vacuum pump is
discharged must be sufficiently vented.
WARNING！
Disregard of this safety note may lead to accidents with fatal or
serious injuries.
DANGER！
Disregard of this safety note will always lead to accidents with
fatal or serious injuries.
CAUTION！
Disregard of this safety note may lead to accidents with minor
in
j
u
r
ies or
p
ro
p
ert
y
dama
g
e.

5
Prior to every transport make sure that the oil is drained.
Storage
Short-term Storage
Version with gas ballast device with ball-cock:
Make sure that the ball-cock of the gas ballast (440) device is closed
Storage of vacuum pump equipped with ball-cock of the gas ballast
(440) and paper filter (applicable to 1RV0063 and 1RV0100):
Seal the paper filter of gas ballast (440) with tapes:
Storage of vacuum pump equipped with ball-cock of the gas ballast
(440) and sintered metal filter (applicable to 1RV0020 and 1RV0040):
Seal the sintered metal filter of gas ballast (440) with tapes:
Make sure that the suction connection/gas inlet and the gas
discharge/ pressure connection are closed
Store the vacuum pump
— if possible in original packaging,
— indoors,
— dry,
— dust free
— vibration free
Conservation
In case of adverse ambient conditions (e.g. aggressive atmosphere,
frequent temperature changes) conserve the vacuum pump immediately. In
case of favorable ambient conditions conserve the vacuum pump if a
storage of more than 3 months is scheduled.
During the factory tests, the vacuum pump inside has been completely in
contact with oil. In case of favorable ambient conditions, it is not necessary
to the pump with conservation oil. In case of unfavorable storage conditions,
the vacuum pump draining with conservation oil is advised. If anything
remains to be clarified please contact your Greenco representative!
Storage of vacuum pump with gas ballast (440) of ball-cock:
Make sure that the ball-cock of the gas ballast device (440) is closed
Storage of vacuum pump with gas ballast (440) of ball-cock and paper filter:
Seal the paper filter of gas ballast (440) with tapes;
Storage of vacuum pump with gas ballast (440) of ball-cock and sintered
metal filter;
Seal the sintered metal filter of gas ballast (440) with tapes;
Make sure all openings are sealed; seal all the openings not
protected with PTEF tape, washer or O-rings.
Fill in conservation oil in small quantities by the suction connection,
observe the oil type and the given quantity in the tables below:
Oil Type
Corex HLP-D 68, P/N 0831 512 575
(or a conservation oil from same quality)
NOTE: VCI stands for “Volatile Corrosion Inhibitor”. VCI-products (film,
paper, cardboard, foam) evaporate a substance that condenses in
molecular thickness on the packed good and by its electro-chemical
properties effectively suppresses corrosion on metallic surfaces. However,
VCI-products may attack the surfaces of plastics and elastomers. Seek
advice from your local packaging dealer! GREENCO uses CORTEC VCI
126 R film for the overseas packaging of large equipment.
Wrap the vacuum pump in VCI film.
Store the vacuum pump.
if possible in original packing
indoors
dry
dust free
vibration free
Commissioning after conservation
Make sure that the gasket, plug or adhesive tape are removed from the
ports.
Commission the vacuum pump as described in the chapter “Installation
and Commissioning” (Page 5).
Installation and Commissioning
Installation prerequisites
Make sure that the assembly of the vacuum pump is carried out in line
with the essential safety requirements.
Mounting Position and space
Make sure that the environment of the vacuum pump is not potentially
explosive.
Make sure that the following ambient conditions will be complied
with：
—Ambient temperature: see “Oil”
If the vacuum pump is installed in a environment of low temperature:
—Ambient pressure: atmospheric pressure
Fit the vacuum pump either with an oil sump heater (on request) or
fit the vacuum pump with a temperature switch and control the vacuum
pump in such a way that it will start automatically when the oil sump
CAUTION
Tilting a vacuum pump that is already filled with oil can cause large
quantities of oil to ingress into the cylinder.
Starting the vacuum pump with excessive quantities of oil in the
cylinder will immediately break the vanes and ruin the vacuum
pump.
Once the vacuum pump is filled with oil it shall not be lifted
anymore.
CAUTION
In case of non-compliance with the installation prerequisites,
particularly in case of insufficient cooling:
Risk of damage or destruction of the vacuum pump and adjoining
plant components!
Risk of injury!
The installation
p
rere
q
uisites must be com
p
lied with.

temperature rise above the allowable temperature.
Make sure that the environmental conditions comply with the
protection class of the drive motor (according to the nameplate).
Make sure that the base for placement/mounting base is even.
To warrant a sufficient cooling, make sure there is a clearance of
minimum 50cm between the pump and nearby wall.
Make sure that no temperature sensitive parts (plastics, wood,
cardboard, paper, electronics) will touch the surface of the vacuum
pump.
Make sure that the installation space or location is vented so that a
sufficient cooling of the vacuum pump is warranted.
Make sure that the vacuum pump will not be touched inadvertently
during operation, provide a guard if appropriate
Make sure that the oil sight glass (83) will remain easily accessible if
the oil change is meant to be performed on location:
Make sure that the oil drain port (95), the oil filter (100) and the oil fill
port (88) will remain easily accessible.
Make sure that enough space will remain for the replacement of the
exhaust filter(s) (120).
Suction Connection
In case the inlet gas can contain dust or other foreign solid particles:
Make sure that a suitable filter (5 micron or less) is installed upstream
the vacuum pump.
Make sure that the suction pipeline fits to the suction connection/gas
inlet (260) of the vaccum pump.
Make sure that the gas will be sucked through a vacuum-tight flexible
hose or a pipe.
In case of using a pipe：
Make sure that the pipe will cause no stress on the vacuum pump's
connection, if necessary use bellows.
In case of very long suction lines it is prudent to use pipes of large line
sizes in order to avoid a loss of efficiency. Seek advice from your
Geenco representative.
If two or more vacuum pumps work on the same suction line, if the volume
of the vacuum system is large enough to suck back oil or if the vacuum shall
be maintained after switching off the vacuum pump：
Provide a manual or automatic operated valve ( =non-return valve)
in the suction line.
(the non-return valve that is installed inside the suction connection is not
meant to be used for this purpose!)
If the vacuum pump is planned to be used for the suction of gas that
contains limited quantities of condensable vapor：
Provide a shut-off valve, a drip-leg and a drain valve in the suction
line, so that condensates can be drained from the suction line.
Make sure that the suction line does not contain foreign objects, e.g.
welding scales.
Discharge connection
It is required that the gas should be discharged without any obstruction; do
not close or plug the discharge pipes or use the vacuum pump for
compressing air.
The following guidelines for the discharge line do not apply, if the aspirated
air is discharged to the environment right at the vacuum pump.
Make sure that the discharge line fits to the gas discharge connection
(155) of the vacuum pump.
In case of using a pipe：
Make sure that the pipe will cause no stress on the discharge
connection, if necessary use bellows.
Make sure that the line size of the discharge line over the entire
length is at least as large as the gas discharge connection (153) of
the vacuum pump.
In case of very long discharge pipelines it is prudent to use larger line sizes
in order to avoid a loss of efficiency and an overload of the vacuum pump.
Seek advice from your Greenco representative.
Keep the back pressure at the discharge port (155) below 1.3 bar (absolute
pressure) (Check it by starting the vacuum pump when appropriate).
Make sure that the discharge line either slopes away from the
vacuum pump or provide a liquid separator or a drip leg with a drain
cock, so that no liquids can back up into the vacuum pump.
WARNING
Discharge lines made from non-conducting material can build up
static charge.
Static discharge can cause explosion of potentially existing oil
mist.
The discharge line must be made of conducting material or
p
rovisions must be made a
g
ainst static dischar
g
e.
CAUTION
The discharged air contains small quantities of vacuum oil.
Staying in vacuum oil contaminated air bears a risk of damage to
health.
If air is discharged into rooms where persons stay, sufficient
ventilation must be provided for.
CAUTION
Intruding foreign objects or liquids can destroy the vacuum
pump.
CAUTION
During operation the surface of the vacuum pump may reach
temperatures of more than 70℃.
Risk of burns!

7
Electrical connection/Controls
Make sure that the stipulations acc. to the EMC-Directive
2004/108/EC, Standard 2006/95/EC for LV applications as well as the
EN-standards, electrical and occupational safety directives and the
local or national regulations, respectively, are complied with.
Make sure that the voltage and frequency of power supply is
compatible with the data on the nameplate of the drive motor (400).
Make sure that an overload protection according to EN 60204-1 is
provided for the drive motor.
Make sure that the drive of the vacuum pump will not be affected by
electric or electromagnetic disturbance from the mains; if necessary
seek advice from the GREENCO service.
In case of mobile installation：
Provide the electrical connection with grommets that serve as
strain-relief.
Installation
Mounting
Make sure that the “Installation Prerequisites” (Page 5) are complied
with.
Set down or mount the vacuum pump at its location
Connecting electrically
Electrically connect the drive motor (400).
Connect the protective earth conductor
Diagrams of electrical connection:
Delta connection (Low voltage):
Star connection (High voltage):
Star connection, multi-voltage motor (High voltage):
Star connection, multi-voltage motor (High voltage):
Setting vacuum pump with three-phase motor
Determine the intended direction of rotation with the arrow (431).
“Bump” the drive motor (400).
Watch the fan wheel of the drive motor (400) and determine the
direction of rotation just before the fan wheel stops.
If the rotation of the fan wheel must be changed:
Switch any two of the drive motor wires in the terminal box.
Connecting Lines/Pipes
In case the suction line is equipped with a shut-off valve:
Connect the suction line.
Connect the discharge line.
Installation without discharge line:
Make sure that the gas discharge (155) is open.
Make sure that all provided covers, guards, hoods etc. are mounted.
Make sure that cooling air inlets and outlets are not covered or
CAUTION
Operation in the wrong direction of rotation can destroy the
vacuum pump in short time.
Prior to starting-up it must be made sure that the vacuum pump is
operated in the proper direction.
CAUTION
The connection schemes given below are typical. Depending on
the specific order or for certain markets deviating connection
schemes may apply.
Risk of damage to the drive motor!
The inside of the terminal box shall be checked for drive motor
connection instructions/schemes.
WARNING
Risk of electrical shock, risk of damage to equipment .
Electrical installation work must only be executed by qualified
personnel that knows and observes the following regulations:
- IEC 364 or CENELECH HD 384 or DIN VDE 0100，respectively,
- IEC-Report 664 or DIN VDE 0110，
-BGV A2 (VBG 4) or corresponding national accident prevention
regulation .

obstructed and that the cooling air flow is not affected adversely in
any other way.
Filling Oil
In case the vacuum pump was treated with conservation oil:
Drain the remainders of conservation oil and top up oil.
The vacuum pump is delivered without oil (oil specification see “Oil” in page
22).
●  According to the description in Oil (Page 22), at least 2L oil shall be kept
in the oil tank (Note: 0.45L oil in 1RV0020, 1L in 1RV0025 and
1RV0040).
NOTE: The amount given in these operating instructions is a guide. The oil
sight glass (83) indicates the actual amount to be filled in.
Remove the oil fill plug (88)
Filling about 2L oil according to the values set in the table “Oil” (Note:
0.45L oil in 1RV0020, 1L in 1RV0025 and 1RV0040).
Make sure that the level is between the MIN and the MAX-markings
of the oil sight glass (83)
Make sure that the sealing ring (89) is inserted into the oil fill plug (88)
and undamaged, replace if necessary
Firmly reinsert the oil fill plug (88) together with the sealing ring (89)
NOTE: Starting the vacuum pump with cold oil is made easier when at this
very moment the suction line is neither closed nor covered with a rubber
mat.
Switch on the vacuum pump.
In case the suction line is equipped with a shut-off valve:
Close the shut-off valve
In case the suction line is not equipped with a shut-off valve：
Cover the suction connection with a rubber mat (260).
Let the vacuum pump run for a few minutes.
Shut down the vacuum pump and wait a few minutes.
Make sure that the level is between the MIN and the MAX-markings
of the oil sight glass (83)
In case the level has fallen below the MIN-marking of the oil sight
glass:
Top-up oil
In case the suction line is equipped with a shut-off valve:
Open the shut-off valve
In case the suction line is not equipped with a shut-off valve:
Remove the rubber mat, and connect the suction connection
Recording of Operational Parameters
As soon as the vacuum pump is operated under normal operating
conditions:
Measure the drive motor current and record it as reference for future
maintenance and troubleshooting work.
Version with exhaust filter pressure gauge：
Read the scale of the exhaust filter pressure gauge and record it as
reference for future maintenance and troubleshooting work (Check
during operation in Page 11).
Operation Notes
Application
The vacuum pump is designed for the suction of air and other dry,
non-aggressive, non-toxic and non-explosive gases
Conveying media with a higher density than air leads to an increased
thermal and mechanical load on the vacuum pump and is permissible only
after prior consultation with Greenco company.
Max. allowed temperature of the inlet gas, see “Oil, Ambient temperature
range”
In case the vacuum pump is equipped with a gas ballast (optional) water
vapor within the gas flow can be tolerated within certain limits (see
“Installation and Commissioning, Operating Notes, Conveying Condensable
vapors” in Page 8). The conveyance of other vapors shall be agreed upon
with GREENCO.
The vacuum pump is made for the intended use in potentially non-explosive
areas.
If the vacuum pump is equipped with ball-lock valve (200) and oil return
pipe:
CAUTION
The vacuum pump is designed for operation under the conditions
described below.
In case of disregard risk of damage or destruction of the vacuum
pump!
Risk of Injury!
The vacuum pump must be operated under the conditions
described below.
CAUTION
Filling oil through the gas inlet (260) will result in breakage of the
vanes (22) and destruction of the vacuum pump.
Oil may be filled through the oil fill port only (88).
CAUTION
During operation the oil separator is filled with hot, pressurised
oil mist.
Risk of injury from hot oil mist with open oil fill port .
Risk of injury if a loosely inserted oil fill plug (88) is ejected .
Remove the oil fill plug (88) only if the vacuum pump is stopped.
The vacuum pump must only be operated with the oil fill plug (88)
firmly inserted.
CAUTION
The vacuum pump is shipped without oil.
Operation without oil will ruin the vacuum pump in short time.
Prior to commissioning it must be made positively sure that oil is
filled in.

9
The vacuum pump is suitable for continuous operation.
If the vacuum pump is equipped with oil return valve (280):
The vacuum pump is suitable for continuous operation. (Follow the relevant
matters concerned in oil circulation; oil circulation in Page 3; oil return in
Page 8).
The vacuum pump is ultimate pressure proof.
Make sure that all provided covers, guards, hoods etc. are mounted
Make sure that protective devices will not be disabled.
Make sure that cooling air inlets and outlets are not covered or
obstructed and that the cooling air flow is not affected adversely in
any other way
Make sure that the “Installation Prerequisites” (see “Installation
Prerequisites and Commissioning” in Page 5) are complied with and
will remain complied with, particularly that a sufficient cooling will be
ensured
Oil return
It is only applicable to vacuum pumps equipped with oil return valves (280).
When the pump is operating, the oil builds up at the bottom of the upper
chamber of oil separator (75), and is unable to flow into the bottom chamber
of oil separator (75). (See Oil circulation in Page 3 for details).
After 10 hour’s continuous run, the pressure difference arises between the
inlet and discharge; turn off the vacuum pump and wait for 15 minutes to
allow the oil to flow from the upper chamber of oil separator (75) into the
bottom chamber.
Note: It is the right time to check the oil temperature, oil level and color.
Conveying Condensable Steams
Version with gas ballast device with ball-cock:
Make sure that the ballast valve is open and will remain open during
operation.
Close the shut-off valve in the suction line.
Operate the vacuum pump with the shut-off valve in the suction line
closed for approx. half an hour, so that the operating temperature will
rise to approx. 75 .℃
At process start:
Open the shut-off valve in the suction line.
At process end:
Close the shut-off valve in the suction line.
Operate the vacuum pump for approx. half an hour.
Maintenance
Prior to action that requires touching of the vacuum pump, let the vacuum
pump cool down.
In case of oil draining, let the vacuum pump cool down for no more
than 20 minutes.
Prior to disconnecting connections make sure that the connected pipes/lines
are vented to atmospheric pressure.
Maintenance Schedule
NOTE: The maintenance intervals depend very much on the specific
operating conditions. The intervals given below shall be considered as
starting values which should be shortened or extended as appropriate.
Particularly heavy duty operation, such like high dust loads in the
environment or in the process gas, other contaminant or ingress of process
material, can make it necessary to shorten the maintenance intervals
significantly.
Daily:
Check the level and the color of the oil (see “Checking the Oil” in
Page 9).
Weekly:
Check the vacuum pump for oil leaks; in case of leaks have the
CAUTION
During operation the surface of the vacuum pump may reach
temperatures of more than 70℃.
Risk of burns!
WARNING
In case the vacuum pump conveyed gas that was contaminated
with foreign materials which are dangerous to health, harmful
material can reside in filters.
Danger to health during inspection, cleaning or replacement of
filters .
Danger to the environment .
Personal protective equipment must be worn during the handling
of contaminated filters.
Contaminated filters are special waste and must be disposed of
separately in compliance with applicable regulations
CAUTION
The discharged air contains small quantities of vacuum oil.
Staying in vacuum oil contaminated air bears a risk of damage to
health.
If air is discharged into rooms where persons stay, sufficient
ventilation must be
p
rovided for.
CAUTION
During operation the surface of the vacuum pump may reach
temperatures of more than 70℃.
Risk of burns!
The vacuum pump shall be protected against contact during
operation.
CAUTION
The residual condensable substances can dilute the vacuum pump
oil, thus compromising the lubricating performance, or even
jamming the rotor.
Take appropriate measure to completely remove the condensable
substances out of vacuum pump.
In order to use the vacuum pump for the conveyance of
condensable vapours, the vacuum pump must be equipped with
shut-off valve in the suction line and with a gas ballast valve.

vacuum pump repaired (GREENCO service).
Monthly:
Make sure that the vacuum pump is shut down and locked against
inadvertent start up.
Check the function of the exhaust filters (120) (see “Exhaust Filters” in
Page 11).
In case an inlet air filter is installed:
Check the inlet air filter (261), or replace the filter when necessary.
In case of operation in a dusty environment:
Follow the requirements in Every 6 Months in page 9.
Every 6 Months:
Make sure that the vacuum pump is shut down and locked
against inadvertent start up.
Make sure that the housing is free from dust and dirt, clean if necessary.
Clean the fan cowlings, fan wheels, ventilation protection screen and
cooling fins.
Yearly:
Make sure that the vacuum pump is shut down and locked against
inadvertent start up.
Replace the exhaust filters (120) (see “Exhaust filters” in page 11).
In case an inlet filter is installed：
◆Replace the inlet air filter cartridge
Check the inlet air filter (261), or clean the filter when necessary.
In case a gas ballast (440) with sintered metal filter is installed:
◆Clean with compressed air or replace the sintered metal filter.
In case a gas ballast (440) with paper filter is installed:
◆Replace the paper filter cartridge.
Every 500 - 2000 Operating hours: （see “Oil Life” in page
9）
●Change the oil, replace the oil filter(s) (100) and clean the float valve
(194) (see “Oil and Oil Filter Change” in page 10).
If the vacuum pump is equipped with float valve (200) and oil return pipe:
Check the float valve (2000) (See Check float valve in page 10).
Checking the oil
Checking the level
Make sure that the oil has collected at the bottom of the oil separator
(75)
Read the level on the sight glass (83)
In case the level has dropped underneath the MIN-marking:
◆Top up oil (see “Topping up Oil” in page 9)
In case the level exceeds the MAX-marking:
◆Check the dilution with condensates. Replace the vacuum pump oil
and check process;
◆Replace gas ballast when necessary (carried out by GREENCO), and
follow the requirements in Conveying Condensable Steams in page 8.
If the gas ballast is used appropriately, the oil level exceeds MAX
marking:
Clean with compressed air or replace the sintered metal filter (applicable to
1RV0020-1RV0040).
Replace filter cartridge (1RV0063 and 1RV0100).
Topping up Oil
NOTE: Under normal conditions there should be no need to top up oil during
the recommended oil change intervals. A significant level drop indicates a
malfunction (see “Troubleshooting” in page 13).
NOTE: During operation the exhaust filter gets saturated with oil. It is
therefore normal that the oil level will drop slightly after replacement of the
exhaust filter.
Make sure that the vacuum pump is shut down and locked
against inadvertent start up. Remove the oil fill plug (88).
Top up oil until the level reaches the middle of the oil sight glass (83).
Add the special oil of Greenco and make sure that the level is in the
middle of the oil sight glass (83).
Make sure that the sealing seat (89) on the oil fill plug (88) is
undamaged, if necessary replace the oil fill plug.
Firmly reinsert the oil fill plug (88) with its sealing seat (89).
Checking the Colour of the Oil
NOTE: The oil should be light, either transparent, a little foamy or a little
tarnished. A milky discolouration that does not vanish after sedation of the
oil indicates contamination with foreign material. Oil that is either
contaminated with foreign material or burnt must be changed (see “Oil
Change” in page 10).
If the gas ballast is installed and applied properly, the oil is still contaminated
by water or other condensed matters:
◆Replace filter cartridge.
◆Clean with compressed air or replace sintered metal filter.
Oil Life
The oil life depends very much on the operating conditions. A clean and dry
air stream and operating temperatures below 100 are ideal. Under these℃
conditions the oil and the oil filter (100) shall be changed every 500-2000
operating hours or after half a year.
Under very unfavourable operating conditions the oil life can be less than
500 operating hours. Extremely short life times indicate malfunctions (see
“Troubleshooting” in page 13) or unsuitable operating conditions, though.
Choose synthetic oil over mineral oil for a longer oil life. Contact Greenco to
select the suitable oil for your process.
CAUTION
During operation the oil separator is filled with hot, pressurised
oil mist.
Risk of injury from hot oil mist with open oil inlet plug .
Remove the oil inlet port (88) only the vacuum pump is stopped.
The vacuum pump must only be operated with the oil fill plug (8
8
firmly inserted.
CAUTION
Filling oil through the suction connection/gas inlet (260) will
result in breakage of the vanes (22) and destruction of the
vacuum pump.
Oil may be filled through the oil fill port only (88).

11
If there is no experience available with regard to the oil life under the
prevailing operation conditions, it is recommended to have an oil analysis
carried out every 500 operating hours and establish the change interval
accordingly.
Oil and Oil Filter Change
Draining Used Oil
NOTE: After switching off the vacuum pump at normal operating
temperature wait no more than 20 minutes to ensure the hot oil is drained.
Make sure that the vacuum pump is shut down and locked against
inadvertent start up.
Make sure that the vacuum pump is vented to atmospheric pressure.
Put a drain tray underneath the oil drain port (95)
Remove the oil drain plug (95), drain the oil
When the oil stream dwindles:
Close the oil drain plug (95).
Switch the vacuum pump on for a few seconds.
Make sure that the vacuum pump is shut down and locked against
inadvertent start up.
Remove the oil drain plug (95) again to drain up the residual oil.
Make sure that the sealing seat (96) on the oil drain plug (95) is
undamaged, if necessary replace the sealing seat.
Firmly reinsert the oil drain plug (95) on the sealing seat (96).
Dispose of the used oil in compliance with applicable regulations.
Flushing the vacuum pump
Make sure that all the used oil is drained.
Make sure that the used oil filter (100) is still in place.
Create respectively 2 litres of flushing agent (0.45 litres for 1RV0020;
1L for 1RV0025 and 1RV0040) from 50 percent oil and 50 percent
paraffin or diesel fuel/fuel oil.
Make sure that the oil drain plug (95) is reinserted correctly.
Remove the oil fill plug (88).
Fill in the flushing agent.
Firmly reinsert the oil fill plug (88).
Close the suction line.
Run the vacuum pump for at least half an hour.
Drain the flushing agent and dispose of it in compliance with
applicable regulations.
NOTE: Due to the use of paraffin and even more in case of using Diesel
fuel/fuel oil, unpleasant odour can occur after recommissioning. If this is a
problem, Diesel fuel/fuel oil should be avoided and the vacuum pump be run
at idle in a suitable place until the unpleasant odour vanishes.
Cleaning of the float valve
(Applicable only to the the vacuum pump with float valve and oil return pipe)
Note: Make sure the float valve (200) works normally, and the vacuum
pump generates limit pressure; the prevent the oil from spilling out from
discharge port (155).
Make sure that the vacuum pump is shut down and locked against
inadvertent start up.
Before removing the pipes, make sure the pipe is connected to open
air.
When necessary, remove the exhaust pipe.
Take off the exhaust cover (155）.
Drain up the oil in the cavity of float valve with suction pipe or used oil
collector.
Loosen the screws (341) and remove the fan cover (340).
Note: When removing oil return pipe (195), a small amount of oil will be left
there; mop it off; be careful not to damage the sealing parts of joints.
Remove the joints between oil return pipe (195) and oil separator (75);
slightly bend the oil return pipe.
Unscrew the two screws on float valve (200); take out the float valve
from oil separator (75).
Check if the float valve (200) is clean or damaged; if necessary, clean it
with compressed air.
Make sure the flanges of float valve (200) are installed with sealing rings
in good condition; if necessary, replace the sealing ring.
Install the float valve (200) in the right position of oil separator (75), and
fix the float valve with two screws and locking washer.
Connect the oil return pipe (195) and oil separator (75) with screws and
sealing washers.
Tighten the screws (341) to secure the fan cover (340).
If the exhaust filter (120) needs no replacement:
Make sure the sealing ring (141) of exhaust cover (155) is clean and
intact; if necessary, replace the sealing ring (141).
Refit the exhaust cover (155) with sealing ring (141) with hex screws
(146); fasten the washers on the oil separator (75).
When necessary, connect the exhaust pipe.
WARNING
Degraded oil can choke pipes and coolers.
Risk of damage to the vacuum pump due to insufficient
lubrication .
Risk of explosion due to overheating .
If there is a suspicion that deposits have gathered inside the
vacuum pump the vacuum pump shall be flushed.
WARNING
In case the vacuum pump conveyed gas that was contaminated
with harmful foreign material the oil will be contaminated with
harmful material.
Danger to health during the changing of contaminated oil.
Danger to the environment .
Personal protective equipment must be worn during the changing
of contaminated oil.
Contaminated oil is special waste and must be disposed of
se
p
aratel
y
in com
p
liance with a
pp
licable re
g
ulations.

Replacing the Oil Filter
Make sure that the entire used oil is drained.
Remove the oil filter (100)
Apply a drop of fresh oil on the sealing ring of the new oil filter (100).
Mount the new oil filter (100) and tighten it by hand.
Dispose of the used oil filter in line with relevant regulations.
Filling in Fresh Oil
Keep oil acc. to the table “Oil” ready.
NOTE: The amount given in these operating instructions is a guide.
The oil sight glass (83) indicates the actual amount to be filled in.
Make sure that the oil outlet plug (95) is firmly inserted.
Remove the oil fill plug (88).
Fill in Greenco oil.
Make sure that the level is between the MIN and the MAX-markings
of the oil sight glass (83).
Make sure that the sealing ring (89) is inserted into the oil inlet plug
(88) and undamaged, replace if necessary.
Firmly reinsert the oil inlet plug (88) together with the sealing ring
(89).
Exhaust Filter
Check during operation
Greenco recommends the use of a filter pressure gauge (available as
accessory, see “Accessories” in page 21). Without filter pressure gauge the
filter resistance shall be assessed on the basis of the drive motor current
drawn.
Version with filter pressure gauge:
Remove the gas inlet pipe from the inlet joint (260).
Make sure the pump is running.
Check that the indication of the filter pressure gauge is in the green
range.
Reinstall the inlet pipe to the inlet (260).
Version without exhaust filter pressure gauge:
Make sure the vacuum pump is running
Check that the indication of the filter pressure gauge is in the usual
range.
Version with oil return valve (280):
NOTE: The discharge air will also contain oil if the vacuum pump is
operated without interruption for a too long period (see “Operation Notes” in
page 8).
●Check that the discharge air is free from oil
Assessment
If the indication of the filter pressure gauge is in the red field or the drive
motor draws too much current and/or the pump flow rate has dropped, then
the exhaust filters (120) are clogged and must be replaced.
NOTE: Exhaust filters cannot be cleaned successfully. Clogged exhaust
filters must be replaced with new ones.
If the filter pressure gauge indicates a lower pressure than usual, or
the drive motor draws less current than usual, the exhaust filters (120) can
be clogged and must be replaced.
If the discharge air contains oil, the exhaust filters (120) can be clogged or
broken through and, if applicable, must be replaced.
Change of the exhaust filters
Removing the exhaust filters
Make sure that the vacuum pump is shut down and locked against
inadvertent start up.
Prior to disconnecting pipes/lines make sure that the connected
pipes/lines are vented to atmospheric pressure.
Remove the discharge line, if necessary.
Remove the discharge cover (155) from the oil separator (75).
Release the spring elements (125) by unscrewing the screws (126),
but do not remove them.
Press down the filter spring (125) in the slot with special tools and
rotate.
Remove the exhaust filter spring (125) from the oil separator (75).
Take the exhaust filter (120) out of the oil separator (75).
 CAUTION
Be ware that the spring (125) of filter may pop out when dismantling
or installing exhaust filter.
Risk of eye injury .
Wear goggles when dismantling or installing spring (125) of
exhaust filter.
WARNIGN
In case the vacuum pump conveyed gas that was contaminated
with foreign materials which are dangerous to health, harmful
material can reside in filters.
Danger to health during inspection, cleaning or replacement of
filters .
Danger to the environment .
Personal protective equipment must be worn during the handling
of contaminated filters.
Contaminated filters are special waste and must be disposed of
separately in compliance with applicable regulations.
CAUTION
Filling oil through the suction connection/gas inlet (260) will
result in breakage of the vanes (22) and destruction of the
vacuum pump.
Oil may be filled through the oil fill port only (88).

13
Inserting the Exhaust Filters
Insert the new exhaust filters (120) with the new o-rings.
Be sure to fit the exhaust filters (120) and ensure it is installed in the
correct position of oil separator (75).
Make sure the top end of the bolt in the center of exhaust filter spring
(125) projects about 2-5 threads.
With special tools, mount the exhaust filter spring (125), fitting the end
in the socket on the oil separator (75); tighten the screws in the slots
of exhaust filters (120).
Fasten the screws on the exhaust filter spring (125), and make the
nuts touch the steel strip on the spring.
Make sure the sealing seat (141) of discharge cover (155) is clean
and intact; replace the damaged one.
Mount the discharge cover (155) with sealing seat (141), hex bolts
(146) and locking washers on the oil separator (75).
When necessary, connect the discharge pipeline
NOTE: During operation the exhaust filters get saturated with oil. It is
therefore normal that the oil level will drop slightly after replacement of the
exhaust filters.
Overhaul
Removal from Service
Temporary Removal from Service
Prior to disconnecting pipes/lines make sure that all pipes/lines are
vented to atmospheric pressure.
Recommissioning

After longer periods of standstill:
Make sure that the vacuum pump is shut down and locked against
inadvertent start up.
Remove the cover around the fan of the drive motor (400).
Slowly rotate the fan wheel by hand several revolutions in the intended
direction of rotation [see stuck on or cast arrow (431).
Mount the cover around the fan wheel of the drive motor (400).
If deposits could have gathered in the vacuum pump:
Flush the vacuum pump (see “Maintenance” in page 8)
Observe the chapter “Installation and Commissioning” (page 5)
Dismantling and Disposal

WARNING
In case the vacuum pump conveyed gas that was contaminated
with harmful foreign material the operating fluid and the exhaust
filter(s) will be contaminated with harmful material.
Harmful material can reside in pores, gaps and internal spaces of
the vacuum pump.
Danger to health during dismantling of the vacuum pump.
Danger to the environment.
During dismantling of the vacuum pump personal protective
equipment must be worn.
The vacuum pump must be decontaminated prior to disposal.
Prior to shipping, the vacuum pump must imperatively be
decontaminated.
Handle the oil, oil filter and exhaust filter separately according to
applicableregulations.
CAUTION
Vanes (22) can stick after a long period of standstill.
Risk of vane breakage if the vacuum pump is started with the
drive motor .
After longer periods of standstill the vacuum pump shall be
turned by hand.
WARNING
In case the vacuum pump conveyed gas that was contaminated
with foreign materials which are dangerous to health, harmful
material can reside in oil and condensates.
Contaminating matters may reside in air bores, gaps and internal
parts of vacuum pump.
Danger to health during dismantling of the vacuum pump.
Danger to the environment.
Prior to shipping, the vacuum pump must imperatively be
decontaminated and the degree of contamination must be
documented in a declaration of decontamination (“Declaration of
Decontamination”).
CAUTION
In order to achieve best efficiency and a long life the vacuum
pump was assembled and adjusted with precisely defined
tolerances.
This adjustment will be lost during dismantling of the vacuum
pump.
It is therefore strictly recommended that any dismantling of the
vacuum pump that is beyond of what is described in this manual
shall be done by the Greenco service.
CAUTION
The non-OEM spares market offers exhaust filters that are
geometrically compatible with Greenco-vacuum pumps, but do not
feature the high retention capacity of genuine Greenco-exhaust
filters and deteriorate the service life and the efficiency of the
vacuum pump due to their increased back pressure.
Increased risk of damage to health .
Adverse effect on efficiency and service life .
In order to keep the emission on the lowest possible level and to
preserve efficiency and service life only genuine Greenco-exhaust
filters shall be used.

Remove the exhaust filter (120) (see “Exhaust Filter” in page 11).
Drain the oil.
Remove the oil filter (100).
Make sure that materials and components to be treated as special
waste have been separated from the vacuum pump.
Make sure that the vacuum pump is not contaminated with harmful
foreign material.
As declared in this manual, the latest technology is adopted, so the
used material of vacuum pump is non-hazardous.
Dispose of the used oil in compliance with applicable regulations.
Dispose of special waste in compliance with applicable regulations.
Dispose of the vacuum pump as scrap metal.
Troubleshooting
WARNING
Risk of electrical shock, risk of damage to equipment.
Electrical installation work must only be executed by qualified personnel that knows and observes the following regulations: -IEC 364 or CENELEC
HD 384 or DIN VDE 0100, respectively,
-IEC-Report 664 or DIN VDE 0110,
-BGV A2 (VBG 4) or equivalent national accident prevention regulation.
CAUTION
During operation the surface of the vacuum pump may reach temperatures of more than 70 .℃
Risk of burns!
Let the vacuum pump cool down prior to a required contact or wear heat protection gloves.
CAUTION
Used oil, used exhaust filters and used oil filters are special waste
and must be disposed of in compliance with applicable
regulations.
CAUTION
Be ware that the spring (125) of filter may pop out when
dismantling or installing exhaust filter.
Risk of eye injury.
Wear goggles when dismantling or installing spring (125) of
exhaust filter.

15
Fault Possible Cause Remedy
The vacuum pump does not reach the
usual pressure
The drive motor draws a too high current
(compare with initial value after
commissioning)
Evacuation of the system takes too long
The vacuum system or suction line is not leak-tight Check the hose or pipe connections for possible leak
If installed with vacuum release valve/regulating
system, vacuum release valve/regulating system is
faulty or damaged
Adjust, repair or replace parts
Contaminated oil (the most common cause) Drain the oil
(see “Maintenance” in page 8)
No or not enough oil in the reservoir Top up oil
(see “Maintenance”in page 8)
The exhaust filters (120) are partly clogged Replace the exhaust filters (120)
(see “Maintenance”in page 8)
The oil filter(100) is partly clogged
(the oil flows through the bypass only, the oil does
not get filtered any more)
Replace the oil filter (100)
(see “Maintenance”in page 8)
Mesh screen (261) on the suction connection (260)
is partly clogged
Clean the mesh screen (261)
If cleaning is required too frequently install a filter
upstream
In case an inlet filter is installed on the suction
connection (260):
The filter on the suction connection (260) is partly
clogged
Clean or replace the inlet filter, respectively
Partial clogging in the suction, discharge or
pressure line Remove the clogging
Long suction, discharge or pressure line with too
small diameter Use larger diameter
The valve disk of the inlet non-return valve is stuck
in closed or partially open position
Disassemble the inlet valve, clean the mesh screen (261)
and the valve (257) as required and reassemble
The oil tubing is defective or leaking
The oil return pipe (195) is broken
Tighten the connections
Replace the connections and/or the tubing (replace with
identically dimensioned parts only)
Version with float valve (200) and oil return pipe:
float ball of float valve (200) stuck at the outlet
Roll the float valve (200); replace it when necessary
(Check float valve in page 10)
A shaft seal is leaking Replace the shaft sealing ring (Greenco service)
The exhaust valve (159) is not properly
seated or stuck in partially open position
Disassemble and reassemble the exhaust valve(159)
(Greenco service)
A vane(22) is blocked in the rotor or otherwise
damaged
Free the vanes (22) or replace with new ones (Greenco
service)
The radial clearance between the rotor (14) and the
cylinder (1) is no longer adequate Readjust the vacuum pump (Greenco service)
Internal parts worn or damaged
Repair the vacuum pump (Greenco service)
The gas conveyed by the vacuum pump
smells displeasing
Process components evaporating under vacuum
readily volatile and thus gaseous components of
the oil, particularly right after an oil change.
Check the process, if applicable
Use a different type of oil, if applicable
Oil (Maintenance in page 8)
Oil not changed for a long time Replace oil, including cleaning and replacing oil filter
(Maintenance in page 8)
Clogged exhaust filter (120) and oil turning black
Flush pump
Replace oil filter (100)
Replace exhaust filter (120)
Fill in fresh oil (Maintenance in page 8)
If the service life of oil is short, use oil of desirable

16
thermal insulation (Oil in page 22) or replace cooling
system
Foreign matters in the pump, damaged vane (22) or
bearing Repair the vacuum pump (Greenco service)
The vacuum pump runs very noisily
Defective bearings Repair the vacuum pump (Greenco service)
Worn coupling element (310) Replace the coupling element (310)
Stuck vanes (22)
Repair the vacuum pump (Greenco service)
Use only approved oils (see “Oil” in page 22) and change
more frequently
The vacuum pump runs very hot
(the oil sump temperature shall not exceed
100 ℃)
Insufficient air ventilation
Make sure that the cooling of the vacuum pump is not
impeded by dust/dirt
Clean the fan cowlings, fan wheels, ventilation screens
and cooling fins
Install the vacuum pump in a narrow space only if
sufficient ventilation is ensured
On a vacuum pump with oil-cooler:
Clean the intermediate spaces of the finned tube
Ambient temperature too high Observe the permitted ambient temperatures
Temperature of the inlet gas too high Observe the permitted temperatures for the inlet gas
The exhaust filter(l20) is partially clogged Replace the exhaust filters (120)
The oil filter (100) is partially clogged
(the oil flows through the bypass only, the oil does
not get filtered any more)
Replace the oil filter (100)
(see “Maintenance” in page 8)
Not enough oil in the reservoir Top up oil
Oil burnt from overheating
Flush the vacuum pump
Replace the oil filter (100)
Replace the exhaust filters (120)
Fill in new oil
(see “Maintenance” in page 8)
In case the oil life is too short: use oil with better heat
resistance (see “Oil” in page 22)or retrofit cooling
Mains frequency or voltage outside tolerance range Provide a more stable power supply
The mesh screen or filter clogged.
The suction connection, discharge or pressure pipe
clogged
Remove the clogging
Long suction, discharge or pressure line with- too
small diameter
Use larger diameter
The vacuum pump fumes at the exhaust
side or expels oil droplets through the
outlet
The oil level drops
The exhaust filters (120) are not properly seated Check the proper position of the exhaust filters (120)
(see “Maintenance” in page 8)
The O-rings from the exhaust filters are missing or
damaged
Add or replace the O-rings
(see “Maintenance”in page 8)
The exhaust filters (120) show cracks Replace the exhaust filters (120
(see “Maintenance”in page 8)
The exhaust filters (120) are clogged with fo- reign
matter
NOTE: The saturation of the exhaust filters- with oil
is no fault and does not impair the function of the
exhaust filters! Oil dropping down from the exhaust
filters is returned to the oil circulation.
Replace the exhaust filters (120)
(see “Maintenance” in page 8)
Version with oil return valve (280): if pump
continuously run
Note: oil separator shows no fault; oil returns to oil
Periodically turn off vacuum pump and check the oil
return valve (280)

17
separator and no gaseous matter generates.
The vacuum pump does not start
The drive motor (400) is not supplied with the
correct voltage or is overloaded Supply the drive motor (400) with the correct voltage
The drive motor starter overload protection is too
small or trip level is too low
Compare the trip level of the drive motor starter overload
protection with the data on the nameplate
Correct if necessary
In case of high ambient temperature:
Set the trip level of the drive motor starter overload
protection 5 percent above the nominal drive motor
current
One of the fuses has blown Check the fuses
Version with AC drive motor: capacitor damaged Repair motor (Greenco service)
The connection cable is too small or too long
causing a voltage drop at the vacuum pump Use sufficiently dimensioned cable
The vacuum pump or the drive motor is blocked
Make sure the drive motor is disconnected from the
power supply
Remove the fan cover
Try to turn the fan by hand
If the unit vacuum pump/drive motor is still frozen,remove
the drive motor and check the drive motor and the
vacuum pump separately
If the vacuum pump is blocked:
Repair the vacuum pump (Greenco service)
The drive motor (400) is defective Replace the drive motor (Greenco service)
The vacuum pump is blocked
Solid foreign matter has entered the vacuum pump
Repair the vacuum pump (Greenco service)
Make sure the suction line is equipped with a mesh
screen
If necessary additionally provide a filter
Corrosion in the vacuum pump from remaining
condensate
Repair the vacuum pump (Greenco service)
Check the process
Observe the chapter “Installation and Commissioning,
Operating Notes, Conveying Condensable vapors” in
page 8
The vacuum pump runs in the wrong direction in the
case that it is equipped withi three-phase motor
Repair the vacuum pump (Greenco service)
When connecting the vacuum pump make sure the
vacuum pump will run in the correct direction (see
“Installation” in page 6)
After shutting down the vacuum pump the vacuum
system exerted under pressure onto the pump
chamber which sucked back excessive oil from the
oil separator into the pump chamber
When the vacuum pump was restarted too much oil
was enclosed between the vanes (22) Oil could not
be compressed and thus broke a vane (22)
Repair the vacuum pump (Greenco service)
Make sure the vacuum system will not exert
underpressure onto the shut-down vacuum pump, if
necessary provide an additional shut-off valve or
non-return valve
Condensate ran into the pump chamber
When the vacuum pump was restarted too much
condensate was enclosed between the vanes (22)
Condensate could not be compressed and thus
broke a vane (22)
Repair the vacuum pump (Greenco service)
Make sure no condensate will enter the vacuum pump, if
necessary provide a drip leg and a drain cock
Drain condensate regularly
The vacuum pump starts, but labours or
runs noisily or rattles
The drive motor draws a too high current
(compare with initial value after
commissioning)
Connection(s) in the drive motor terminal box are
defective
Not all drive motor coils are properly connected
The drive motor operates on two phases only
Check the proper connection of the wires against the
connection diagram
Tighten or replace loose connections
The vacuum pump runs in the wrong direction Verification and rectification see “Installation and

18
Commissioning” in page 5，correct if necessary
Standstill over several weeks or months Let the vacuum pump run warm with inlet closed
Oil viscosity is too high for the ambient temperature
Use synthetic oil, if necessary use oil of the next lower
viscosity class (CAUTION: operation with too low
viscosity can cause chatter marks inside the cylinder)
Warm up the oil with a heating prior to starting up the
vacuum pump or, make sure that the vacuum pump runs
in intervals in order not to let it get too cold.
Improper oil quantity, unsuitable oil type
Use the proper quantity of one of the recommended oils
(see “Oil” in page 22,
Oil change see “Maintenance”)
Over ten hours, the oil accumulates in the upper
chamber of oil separator (75); it can spill out along
with the gas discharged when it reaches a certain
amount
If it is intact, and help the oil flow from the upper chamber
of oil separator (75) to the bottom chamber after the
pump is shut down (Oil circulation in page 3)
For the pump equipped with oil return valve (280):
oil return valve stop working or clogged (correct
operation mode: oil flows into the oil return valve,
and it closes; the vacuum generates and it opens.
Note: do not suck the oil return valve with mouth0
Clean or replace oil return valve (280)
For the vacuum pump equipped with float valve
(200) and oil return pipe: float valve (200) stuck at
opening
Roll the float valve (200) or replace it when necessary
(Checking float valve in page 10)
Oil return pipe (195) clogged or damaged
Clean the clogged oil return pipe (195); replace the
damaged oil return pipe (195); and fill in oil (request
service from Greenco when necessary)
The oil is black Oil change intervals are too long
The oil was overheated
Flush the vacuum pump
Replace the oil filter(100)
Replace the exhaust filters (120)
Fill in new oil
(see “Maintenance” in page 8)
In case the oil life is too short: use oil with better heat
resistance (see “Oil” in page 22) or retrofit cooling
The oil is watery and coloured white
The vacuum pump aspirated water or significant
amounts of humidity
For the vacuum pumps equipped with gas ballast:
clogged filter cartridge
Flush the vacuum pump
Replace the oil filter(100)
Replace the exhaust filters (120)
Flush the vacuum pump
(see “Maintenance”in page 8)
Modify the operational mode
(see “Installation and Commissioning, Operating Notes,
Conveying Condensable vapors”in page 8)
For the pump equipped with gas ballast (440): replace
filter
The oil is resinous and/or sticky Improper oil type, perhaps in confusion
Flush the vacuum pump
Replace the oil filter(100)
Replace the exhaust filters (120)
Fill in new oil
(see “Maintenance”in page 8)
Make sure the proper oil is used for the application
The oil foams Mixing of incompatible oils
Flush the vacuum pump
Replace the oil filter(100)
Replace the exhaust filters (120)
Fill in new oil
(see “Maintenance” in page 8)
Make sure the proper oil is used for the application

19
1RV0020 Exploded drawing
Exploded drawing