Pfeiffer Vacuum HENA 200 User manual

PD 0042 BEN/F (1606)
OPERATING INSTRUCTIONS EN
Translation of the original instructions
HENA 200/300
Rotary Vane Pump

Table of contents
2
Table of contents
1 About this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 Validity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Protective equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Proper use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4 Improper use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Transport and storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1 Transport. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4 Product description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.1 Product identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.2 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.3 Range of application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.1 Setting up the pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.2 Connecting the vacuum side. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.3 Connecting the exhaust side. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.4 Connecting to the mains power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.5 Filling up the operating fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.6 Operating fluid temperature monitoring (option) . . . . . . . . . . . . . . . . . . . . 17
5.7 Operating fluid level monitoring (option) . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.8 Connecting the heat exchanger (option). . . . . . . . . . . . . . . . . . . . . . . . . . 18
6 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.1 Before switching on. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.2 Switching on the pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.3 Pumping condensable vapours. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.4 Topping up the operating fluid. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.5 Switching off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.1 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.2 Changing the operating fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.3 Changing the exhaust filter in the operating fluid separator . . . . . . . . . . . 27
7.4 Cleaning the float valve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.5 Cleaning the intake filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.6 Cleaning the gas ballast valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.7 Cleaning the fan covers and radiator . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8 Decommissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.1 Shutting down for longer periods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.2 Re-starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
9 Malfunctions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
9.1 Rectifying malfunctions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
10 Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
11 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
11.1 Spare parts packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Table of contents
3
12 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
13 Technical data and dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
13.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
13.2 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
13.3 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

4
About this manual
1 About this manual
1.1 Validity
This operating manual is for customers of Pfeiffer Vacuum. It describes the functioning
of the designated product and provides the most important information for safe use of
the unit. The description follows applicable EU guidelines. All information provided in this
operating manual refers to the current state of the product's development. The documen-
tation remains valid as long as the customer does not make any changes to the product.
Up-to-date operating instructions can also be downloaded from
www.pfeiffer-vacuum.com.
Applicable docu-
ments
*also available via www.pfeiffer-vacuum.com
1.2 Conventions
Safety instructions The safety instructions in Pfeiffer Vacuum operating instructions are the result of risk
evaluations and hazard analyses and are oriented on international certification stan-
dards as specified by UL, CSA, ANSI Z-535, SEMI S1, ISO 3864 and DIN 4844. In this
document, the following hazard levels and information are considered:
Hena 200/300 Operating instructions
Declaration of Conformity Part of this document
Operating instructions for accessories (order-specifically) see section "accessories"*
DANGER
Imminent danger
Indicates an imminent hazardous situation that will result in death or serious injury.
WARNING
Possibly imminent danger
Indicates an imminent hazardous situation that can result in death or serious injury.
CAUTION
Possibly imminent danger
Indicates an imminent hazardous situation that can result in minor or moderate injury.
NOTICE
Command or note
Command to perform an action or information about properties, the disregarding of
which may result in damage to the product.

About this manual
5
Pictographs
Instructions in the
text
Work instruction: here you have to do something.
Symbols used The following symbols are used consistently throughout in all illustrations:
Plate heat exchanger connection
An oil/water heat exchanger can also be used for applications with adverse environmen-
tal conditions. This can only be fitted in the factory and is not possible retroactively.
A solenoid valve that only opens the cooling water flow when the pump is switched on,
can be fitted in the cooling water pipe to check the cooling water inflow.
Prohibition of an action to avoid any risk of accidents, the disregarding
of which may result in serious accidents
Warning of a displayed source of danger in connection with operation of
the unit or equipment
Command to perform an action or task associated with a source of dan-
ger, the disregarding of which may result in serious accidents
Important information about the product or this document
NOTICE
Damage to the pump rotor
For applications with short evacuating cycles or increased ambient temperature the ro-
tor can get blocked after switching off and restarting the motor, because of different rates
at which the pump housing and the rotor cool down.
Switch off water cooling supply as well as a separately driven fan immediately when
switching off the pump.

6
About this manual
Fig. 1: Making the cooling water connection
Vacuum flange
Exhaust flange
Gas ballast valve
Power connection
10.1 Cooling water inlet 10.2 Cooling water outlet
10.2
10.1
G

Safety
7
2Safety
2.1 Safety precautions
●Do not expose any body parts to the vacuum.
●Observe the safety and accident prevention regulations.
●Check regularly that all safety precautions are being complied with.
●Do not carry out any unauthorised modifications or conversions to the pumps.
●Depending on the operating and ambient conditions, the surface temperature of the
pumps may rise above 70 °C. Use suitable finger guards if necessary.
●When returning the pumps to us please note the instructions in the Service section.
Duty to inform
Each person involved in the installation, operation or maintenance of the vacuum pump
must read and observe the safety-related parts of these operating instructions.
The operator is obligated to make operating personnel aware of dangers originating
from the vacuum pump, the pumped medium and the entire system.
Installation and operation of accessories
Pfeiffer Vacuum pumps can be equipped with a series of adapted accessories. The in-
stallation, operation and maintenance of connected devices are described in detail in
the operating instructions of the individual components.
For information on order numbers of components, see "Accessories".
Use original accessory parts only.

8
Safety
2.2 Protective equipment
Determined situations concerning the handling of vacuum pumps require wearing of per-
sonal protective equipment. The owner, respectively the employer are obligated to pro-
vide an adequate equipment to any operating persons.
2.3 Proper use
●The vacuum pump may only be used to generate a vacuum.
●Only use the vacuum pump for applications with oxygen concentration ≤21%.
●Installation, operating and maintenance regulations must be complied with.
●Other accessories, than those described in this manual, must not be used without the
agreement of Pfeiffer Vacuum.
2.4 Improper use
Improper use will cause all claims for liability and warranties to be forfeited. Improper use
is defined as usage for purposes deviating from those mentioned above, especially:
●pumping of corrosive gases
●pumping of explosive media
●operation in potentially explosive areas
●pumping of gases containing impurities such as particles, dusts and condensate; note
the vapour compatibility levels of the pump
●pumping of substances that tend to sublime
●use of the vacuum pump to generate pressure
DANGER
Danger to health by hazardous substances during maintenance or installation
Depending on the process vacuum pumps, components or operating fluids can be con-
taminated by toxic, reactive or radioactive substances.
Wear adequate protective equipment during maintenance and repairs or in case of
reinstallation.
CAUTION
Risk of injury through hot surfaces
Vacuum pumps can become hot during operation.
Allow the pump to cool before maintenance and repairs.
If necessary wear protective gloves according to EN 420.
WARNING
Increased noise emission!
Increased noise emission can occur within a limited area surrounding the vacuum
pump.
Provide noise protection or
wear hearing protection.
NOTICE
EC conformity
The manufacturer's declaration of conformity becomes invalid if the operator modifies
the original product or installs additional components.
Following installation into a plant and before commissioning, the operator must check
the entire system for compliance with the valid EU directives and reassess it accord-
ingly.

Transport and storage
9
●pumping of liquids
●the use of operating fluids not specified by Pfeiffer Vacuum
●connection to pumps or units which are not suitable for this purpose according to their
operating instructions
●connection to units which have exposed voltage-carrying parts
●operation of the devices in areas with ionizing radiation
3 Transport and storage
3.1 Transport
Look for transportation damage when receiving the pump.
Use only a forklift to transport pump packed on pallet.
Unpack pump and undo screws on transport container.
Reuse the transport container of the vacuum pump.
– Transport or ship vacuum pumps in the original packing preferably.
Transport without
packaging
Remove the locking cap from the vacuum and exhaust flange immediately before con-
necting!
Use only the eye bolt on the top side of the pump to lift the pump.
To lift the pump without motor and if accessories are mounted, fit another strap at a
suitable position.
3.2 Storage
Check that all the openings on the pump are securely closed.
Fill up the pump with new operating fluid to the top edge of the sight glass.
Store the pump only indoors, preferably at temperatures between -10 °C and +40 °C.
– In rooms with moist or aggressive atmospheres, the pump must be airproof shrink-
wrapped in a plastic bag together with a bag of desiccant.
– After storage periods longer than two years, it is recommended to carry out main-
tenance and change the operating fluid before using the pump.
WARNING
Danger from falling and swinging loads!
When lifting the pump there is a danger of falling parts.
Make sure that there are no persons under the suspended load.
Close off and supervise the area under the pump.
CAUTION
Operating fluid overflows into the pump system if the pump is tilted!
Vane fractures when pump starts up.
Only transport pump without operating fluid.

10
Product description
4 Product description
4.1 Product identification
To correctly identify the product when communicating with Pfeiffer Vacuum, always have
the information from the rating plate available and use it:
●Pump model and model number
●Serial number
●Type and amount of operating fluid
●Date of manufacture
Please find the voltage range and motor-related data on the separately attached motor
rating plate.
Scope of delivery ●Pump with drive unit
●Locking cap for vacuum and exhaust flange
●Operating fluid (except F4 and F5)
●Operating instructions
Pump types
Pump type Pump versions
Hena 200 Standard version of pump
●Vacuum connection and outlet connection: DN 100 ISO-K
●Operating fluid return unit via float valve
●Three-phase motors with 3 PTC motor protection
●Gas ballast valve
Hena 300 Standard version of pump
●Vacuum connection and outlet connection: DN 100 ISO-K
●Operating fluid return unit via float valve
●Three-phase motors with 3 PTC motor protection
●Gas ballast valve

Product description
11
4.2 Function
The HenaLine™ series pumps are oil-sealed, single stage operating rotary vane pumps
with air cooling and circulatory lubrication. A vacuum safety valve in the intake flange
closes the intake line automatically and prevents operating fluid back-streaming when
the pump is switched off. An integrated oil mist filter cleans the pumped gas and prevents
the expulsion of operating fluid mist at the exhaust. The operating fluid, collected in the
separator, is fed back to the pump. In addition there is a filter mounted at the operating
fluid separator, which cleans the operating fluid.
Fig. 2: Hena 200/300
Oil circulation The vacuum pump requires operating fluid for sealing the gap, for lubrication and for
cooling. The operating fluid reservoir is on the pressure side of the vacuum pump on the
floor of the operating fluid separator. The pressure differential between the pressure side
and suction side automatically causes operating fluid to be sucked in over the supply
lines from the operating fluid separator and feed into the pumping system. The incoming
operating fluid, together with the incoming gas, is pumped through the vacuum pump and
exhausted into the operating fluid separator as oil mist. Operating fluid that is separated
at the exhaust filters collects in the upper part of operating fluid separator 75 and is re-
turned via operating fluid return line directly to the intake side.
Cooling The vacuum pump is cooled by heat radiation from the surface of the vacuum pump, the
air flow of the two fan impellers, and by the pumped gas.
4.3 Range of application
The vacuum pump is intended for the evacuation of air or other non-aggressive, non-poi-
sonous and non-explosive gases. Pumping media with a higher density than air results
in a higher thermal and mechanical load on the vacuum pump and the drive, and is only
permitted after prior consultation with Pfeiffer Vacuum.
1 Vacuum flange
2 Exhaust flange
75 Operating fluid separator
83 Sight glass
88 Operating fluid filler
screw (manometer)
95 Operating fluid drain screw
100 Operating fluid filter
75 1 2
88 83 95
100

12
Installation
5 Installation
5.1 Setting up the pump
Installation location Observe the following requirements when setting up the pump:
●Consider the load-bearing capacity of the installation site.
●Maximum installation altitude 1000 m (above mean sea level)
●Permissible ambient temperature: +12 ... 40 °C
●Maximum relative humidity 95%
Fill up with operating fluid before operating the first time .
– Amount and type according to rating plate
Always place the pump on a firm, even surface.
– Where stationary installation is involved, anchor the pump on site.
When installing the pump in a closed housing, ensure there is sufficient air circulation.
– Sight glass and gas ballast valve must be visible and readily accessible.
– Voltage and frequency information given on the motor rating plate must be visible.
Fig. 3: Setting up the pump
> 200 mm
> 200 mm

Installation
13
5.2 Connecting the vacuum side
Remove locking cap from the vacuum flange and insert centering ring.
The connection between the pump and the vacuum chamber should be kept as short
as possible.
– Depending on the pump type, use metallic hoses or PVC hoses with flange con-
nections.
– Separators, filters etc. may be installed upstream to protect the pump (see acces-
sories). However, please observe the loss of pumping capacity due to the conduc-
tivity of the accessories.
5.3 Connecting the exhaust side
Choose the cross-section of the exhaust line to be at least the size of the nominal
connection diameter of the vacuum pump's exhaust connection.
Piping to the pump must be suspended or supported.
– Physical forces from the piping system must not be allowed to act on vacuum
pumps.
Lay piping from the pump sloping downward so that no condensate can flow back into
the pump; otherwise fit a condensate separator.
– If an air trap is created in the system, then a device for draining condensation water
must be provided at the lowest point.
CAUTION
High pressure in the exhaust line!
Danger of damage to the seals and danger of the pump bursting.
Install the line without shut-off valves on the exhaust side.
If there is danger of a build-up of excess pressure (> 1500 mbar abs.) in the lines,
observe all official accident prevention safety regulations.
WARNING
Emission of toxic substances from the exhaust!
Danger of poisoning from emitted gases or vapours, which can be detrimental to health
and/or can pollute the environment, depending on the particular application.
Comply with the applicable regulations when working with toxic substances.
Only officially approved filter systems may be used to separate and remove these
substances.

14
Installation
5.4 Connecting to the mains power supply
Depending on the pump type, different motor versions or mains voltages are possible:
●Three phase motor (with 3 PTC) without switch and mains cable.
Three-phase motor Switching of multi-voltage motors.
The standard motor can be connected in 3 different switching configurations. Note the
voltage on the motor rating plate in each case.
Multi-voltage motor (low voltage)
Fig. 4: Double star circuit
Multi-voltage motor (medium voltage)
Fig. 5: Delta circuit
DANGER
Voltage-bearing elements
Danger to life from electric shock.
The electrical connection can be carried out only by trained and authorised electri-
cians.
Disconnect the power supply and secure it against being switched back on.
Ensure the system is adequately earthed.
NOTICE
Excess voltage!
Danger of destroying the motor.
Power connections must comply with local regulations. Voltage and frequency infor-
mation given on the motor rating plate must correspond to the mains voltage and fre-
quency values.
To protect the motor and supply cable in case of malfunction, mains fuse protection
must be implemented. Recommended: Type K slow blow circuit breaker.
WARNING
Danger of injury from moving parts!
After power failure or motor shutdown due to overheating, the motor may restart auto-
matically.
Secure the motor so that it cannot be switched on while any work is being performed
on the pump.
If necessary, dismantle the pump from the installation for inspection.
U3 U2 U4
U1
V3 V2 V4 V1
VW3 W2 W4
W1
L1
L2
L3
U3 U2 U4
U1
V3 V2 V4 V1
VW3 W2 W4
W1
L1
L2
L3

Installation
15
Multi-voltage motor (high voltage)
Fig. 6: Star circuit
Circuit for motor designs with 6-pole terminal strip
Delta circuit
The three phases are switched one behind other and the connecting points are connect-
ed to the mains. The voltage per phase is equal to the mains voltage, on the other hand,
the mains current is √3 times the phase current. The delta circuit is identified by the ∆
symbol. The voltage between the mains incoming supply lines is called mains voltage.
The mains current is the current flowing in the incoming supply lines.
Fig. 7: Delta circuit (low voltage)
Star circuit
The ends of the three phases are connected in the star point. The terminal voltage is √3
times the phase voltage, the mains current is equal to the phase current. The star circuit
is identified by the Ysymbol.
Fig. 8: Star circuit (for high voltage)
Checking the direction of rotation
The control of the direction of rotation is required for pumps with three-phase motors!
Remove the locking cap from the exhaust flange.
Switch the pump on briefly (from 2 to 3 sec.).
U3 U2 U4
U1
V3 V2 V4 V1
VW3 W2 W4
W1
L1
L2
L3
W2
U1
U2 V2
V
V1 W1
L1 L2 L3
V
L1 L2 L3
W2
U1
U2 V2
V1 W1
NOTICE
Do not start with star/delta connection.
Always start motor directly.
CAUTION
Operating fluids may leak out!
If the direction of rotation is incorrect, there is a danger that operating fluids may leak at
the vacuum flange.
Always check the direction of rotation before filling in operating fluid.

16
Installation
– Rotation must be in a clockwise direction in view of the shaft end of the motor (see
the arrow on the fan cover).
If the direction of rotation is incorrect: Swap two phase contacts at the connecting ca-
ble.
Fill up the operating fluid.
Motor protection With PTC temperature sensors (3PTC)
Pump motors equipped with PTC temperature sensors (3PTC) in the stator windings can
be connected to a PTC resistor tripping device for protection against overload. Other ap-
proved motor temperature monitoring can be used also by the operator.
Tripping devices store the shutdown event and need to be manually switched back on
again via the integrated RESET button or via the external RESET S3. Mains-ON is de-
tected as an automatic RESET.
Set up the connections so that the directional rotation indicated on the pump is main-
tained, regardless of the representations in the current flow diagram.
Fig. 9: Connection example for a three-phase AC motor with PTC resistor tripping device
USControl voltage
S1OFF button
S2ON button
S3RESET button, external
K1 Contactor
F1 ... F4 Fuses
T1... T3 PTC resistor sensor
H1 Tripping indicator
M Motor, 3-phase
1) Only for devices with two
relay outputs
2) Only for MSR type
3) Only for order no.:
P 4768 051 FQ
N
L1
M
3
L2
L3
F1 - F3
K1
10 11
AC 220 ... 240 V
Us F4
UVW
S1
S2
k1
K1
H1
S3
2)
A1 A2 T1 T2 Y2Y1 24 21 22 14 1211
2) 2) 1) 1) 1)
T1...T3
3)

Installation
17
5.5 Filling up the operating fluid
The type and amount of operating fluid should be visible on the pump's rating plate for
every rotary vane pump.
The delivery consignment for the standard pump contains sufficient operating fluid for
one filling. The use of other operating fluids requires prior authorisation from Pfeiffer Vac-
uum.
Permissible operating fluid
●P3 (standard operating fluid)
●Operating fluid for special applications on request
Filling up the operat-
ing fluid
Unscrew operating fluid filler screw 88.
Fill up with operating fluid to the middle of the sight glass.
– Filling quantity approx. 6,5 l of operating fluid.
Fig. 10: Filling up the operating fluid
Screw in operating fluid filler screw 88.
Close intake port valve (if present) or cover intake flange.
Start pump and run it for max. 5 minutes.
Switch off pump and wait until the operating fluid has collected in the separator box.
Check fill level: The correct fill level is between the markings on the sight glass.
– If the fill level drops below the "Min" marking, add operating fluid.
Open intake port valve.
5.6 Operating fluid temperature monitoring (option)
A temperature switch 488 can be installed at the operating fluid separator 75 (oil sump)
for monitoring the operating fluid temperature.
NOTICE
Use approved operating fluids only!
The use of operating fluids that have not been approved by Pfeiffer Vacuum shall result
in a limited warranty. In such cases, it is not possible to guarantee that product-specific
performance data will be achieved.
Prior consultation is required before using other application-specific operating fluids.
83 Sight glass
88 Operating fluid filler
screw
95 Operating fluid drain
screw
88
83
95
Max.
Min.

18
Installation
The pump-specific switch point of the temperature switch 488 must be set, so that an
alarm is triggered and the pump is switched off, when the operating fluid temperature ex-
ceeds 100 °C.
5.7 Operating fluid level monitoring (option)
A level switch 496, which is fixed to the operating fluid separator 75 (oil sump), is used
to monitor the operating fluid level. If the fill level falls below the "Min" mark, the opening
of the change-over contact can be used as a signal to switch off the pump.
Fig. 11: Operating fluid temperature and level monitoring
5.8 Connecting the heat exchanger (option)
Plate heat exchanger connection
An oil/water heat exchanger can also be used for applications with adverse environmen-
tal conditions. This can only be fitted in the factory and is not possible retroactively.
A solenoid valve that only opens the cooling water flow when the pump is switched on,
can be fitted in the cooling water pipe to check the cooling water inflow.
Parameter Operating fluid temperature switch
Protection category IP54
Contact Two-way contact
Set point adjustable
Switching voltage 230 V AC / V DC
Current max. 2 A AC / 0.25 A DC
488 Port for operating fluid
temperature switch
496 Port for operating fluid lev-
el switch
Parameter Operating fluid level monitoring
Protection category IP65
Contact opens if level < min.
Switching voltage max. 230 V AC / 48 V DC
Current max. 1 A
Switching power max. 26 VA / 20 W
488 496
14
2
>
12
3
NOTICE
Damage to the pump rotor
For applications with short evacuating cycles or increased ambient temperature the ro-
tor can get blocked after switching off and restarting the motor, because of different rates
at which the pump housing and the rotor cool down.
Switch off water cooling supply as well as a separately driven fan immediately when
switching off the pump.

Installation
19
Fig. 12: Making the cooling water connection
Requirements for the cooling water
The cooling water must be filtered in all cases. This keeps dirt deposits and organic sus-
pended particles that could accelerate pitting out of the cooling circuit. Complying with
the following requirements for cooling water will prevent corrosion damage:
Connecting the cool-
ing water
Connect the cooling water lines:
– Cooling water inlet (10.1).
– Cooling water outlet (10.2); must be pressure-free.
Open cooling water supply and fill the cooling system until cooling water comes out of
the outlet;
– adjust flow of 2 ... 2.5 l/min on-site.
Stop cooling water supply.
10.1 Cooling water inlet 10.2 Cooling water outlet
Requirements for the cooling water
Water filtered, mechanically pure, optically clear, no turbidity, no sediments, chem-
ically neutral
Min. oxygen content 4 mg/kg
Max. chloride content 100 mg/kg
Max. carbonate hardness for the water temperatures
15 ... 25 °C
30 ... 40 °C
10 ° dH
6° dH
Max. potassium permanganate usage
pH value
10 mg/kg
7 ... 9
Aggressive carbon dioxide and ammonia must not be detectable
Max. electrical conductivity 500 μS/cm
Max. impurity particle size 25 μm
Permitted inlet overpressure range; if the pressure is higher a pressure reducer
valve must be integrated
2000 ... 6000 hPa
Permitted cooling water temperature range 5 ... 35°C
10.2
10.1

20
Operation
6Operation
6.1 Before switching on
Check the operating fluid level in the sight glass.
Compare the voltage and frequency information on the rating plate with the mains volt-
age and frequency values.
Check that the exhaust connection allows free flow (max. permissible pressure 150
hPa absolute).
– Activate the shut-off valves in such a way that they open before or at the same time
as the pump is started.
Protect the pump sufficiently from taking in contaminants by means of suitable precau-
tions (e.g. dust filters); if necessary, check operating fluid regularly or replace at short-
er intervals.
Open cooling water supply and ensure sufficient flow; adjust if necessary.
6.2 Switching on the pump
The pump can be switched on in any pressure range between atmospheric and
ultimate pressure.
No special precautions are necessary when pumping dry gases. In order to attain the
lowest possible ultimate pressures, the gas ballast valve should be closed.
Switch on the pump with the vacuum flange closed and allow to warm up for 30 min-
utes.
Operating fluid return
via float valve
The pumps are fitted with an operating fluid return as standard. If the operating fluid col-
lected in the operating fluid separator 75 reaches a definite level, the float valve opens
and the ejected operating fluid is returned to the pump’s intake flange.
WARNING
Danger of burns from exiting hot oil mist!
During operation, the operating fluid separator is filled with hot, pressurised oil mist.
Only operate the vacuum pump with the operating fluid filler screw securely fitted.
Open the blanking plugs on the separator only when the pump is switched off.
CAUTION
Hot surface!
Danger of burns if hot parts are touched. Depending on the operating and ambient con-
ditions, the surface temperature of the pump may rise above 70 °C.
In this case, use suitable finger guards.
Type / Version Intake pressure for continu-
ous operation
Intake pressure for intermit-
tent operation
Hena 200/300
Operating fluid return via float
valve
< 800 hPa unlimited < 800 hPa unlimited
NOTICE
The operating fluid return only works properly if the working pressure is < 800 hPa.