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Technology for Vacuum Systems
Instructions for use
MZ 2C VARIO
MD 4C VARIO
PC 2002 VARIO
PC 2003 VARIO
PC 2004 VARIO
Chemistry pumping units with speed control
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully the validity of this document with respect to his product. manual-no.: 999034 / 22/04/2008
page 2 of 51
Dear customer,
Your VACUUBRAND diaphragm pump shall support you at your work for a long time without any trouble and with full load output.Thanks to our large practical experience we attained much information how you could add to an efficient application and to personal safety. Please read these instructions for use prior to the initial start-up of your pump.
VACUUBRAND diaphragm pumps are the result of many years of experience in construction and practical operation of these pumps combined with the latest results in material and manufacturing technology.
Our quality maxim is the ”zero fault principle”:
Every delivered diaphragm pump is tested extensively including an endurance run of 18 hours. Due to this endurance run, also faults, which occur rarely, are reported an can be corrected. Every single diaphragm pump is tested on achievement of the specification after the endurance run.
Every VACUUBRAND pump leaving our factory achieves the specification.We feel obliged to this high quality standard.
We are aware that the vacuum pump should not draw a part of the real work and we hope to contribute with our products to an effective and trouble-free realisation of your work.
Yours
VACUUBRAND GMBH + CO KG
After sales service: Contact your local dealer or call +49 9342 808-193.
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully the validity of this document with respect to his product. manual-no.: 999034 / 22/04/2008
page 3 of 51 |
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Contents |
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Safety information! .................................................................................................... |
4 |
Technical data............................................................................................................ |
8 |
Notes on operation.................................................................................................. |
15 |
General view modes ................................................................................................ |
19 |
Working with the controller ..................................................................................... |
20 |
General view mode ”vacuum control” ................................................................... |
23 |
Mode vacuum control ............................................................................................. |
24 |
Mode continuous pumping .................................................................................... |
28 |
General view mode VACUU•LAN............................................................................ |
30 |
Mode VACUU•LAN .................................................................................................. |
31 |
Accessories ............................................................................................................. |
33 |
Troubleshooting ...................................................................................................... |
34 |
Readjustment .......................................................................................................... |
36 |
How to determine the best distillation conditions ................................................ |
37 |
Interface parameters ............................................................................................... |
38 |
Read commands ..................................................................................................... |
39 |
Write commands...................................................................................................... |
40 |
Replacing diaphragms and valves ........................................................................ |
41 |
Cleaning and assembling components ................................................................. |
47 |
Calibration in the factory......................................................................................... |
47 |
Notes on return to the factory ................................................................................ |
48 |
Health and safety clearance form .......................................................................... |
49 |
Attention! Important notes! |
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Not permitted! Misuse may cause damage.
Caution! Hot surface!
Isolate equipment from mains.
Note.
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully the validity of this document with respect to his product. manual-no.: 999034 / 22/04/2008
page 4 of 51
Safety information!
Remove all packing material, remove the product from its packing-box, remove the protective covers from the inlet and outlet ports and keep, inspect the equipment.
If the equipment is damaged, notify the supplier and the carrier in writing within three days; state the item number of the product together with the order number and the supplier’s invoice number. Retain all packing material for inspection.
Do not use the equipment if it is damaged.
If the equipment is not used immediately, replace the protective covers. Store the equipment in suitable conditions.
Read and comply with this manual before installing or operating the equipment.
Transport the pump at the provided handles.
Use the equipment for the intended use only (for generation and measurement of vacuum).
Prevent any part of the human body from coming in contact with the vacuum.
Comply with notes on correct vacuum and electrical connections, see section ”Use and operation”.
Make sure that the individual components are only connected, combined and operated according to their design and as indicated in the instructions for use.
Comply with national safety regulations and safety requirements concerning the use of vacuum and electrical equipment.
The mains switch for the controller and the pump is at the rear side of the controller.
After switching off the pump, wait 60 sec. minimum until next switching on.
Due to the high leakage current (up to 3.5 mA), a too low rated fault-current circuit breaker may be activated, especially if several pumps are operated parallelly.
Attention: Make sure that a protective conductor connection is established before the equipment is connected to mains supply!
The pumping units MZ 2C VARIO, MD 4C VARIO, PC 2002 VARIO, PC 2003 VARIO and PC 2004 VARIO are devices with double-pole cutoff and a symmetric capacitive circuit.
If the leakage current is obtained by measuring the equivalent leakage current (according to VDE 0701, September 2000, section 5.7), the measured value may be divided by a factor of 2 in case the device is equipped with a double-pole cutoff and a symmetric capacitive circuit.
The shock currents according to EN 61010 are below the limit of 3,5 mA.
Equipment must be connected only to a suitable fused and protected electrical supply and a suitable earth point. Failure to connect the motor to ground may result in deadly electrical shock.
The supply cable may be fitted with a moulded European IEC plug or a plug suitable for your local electrical supply. If the plug has been removed or has to be removed, the cable will contain wires colour coded as follows: green or green and yellow: earth; blue or white: neutral; brown or black: live.
Check that mains voltage and current conform with the equipment (see rating plate).
If the equipment is brought from cold environment into a room for operation, allow the equipment to warm up (pay attention to water condensation on cold surfaces).
Make sure ventilation is adequate if pump is installed in a housing or if ambient temperature is elevated.
Comply with all relevant safety requirements (regulations and guidelines) and adopt suitable safety measures.
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully the validity of this document with respect to his product. manual-no.: 999034 / 22/04/2008
page 5 of 51
Provide a firm level platform for the equipment and check that the system to be evacuated is mechanically stable and that all fittings are secure.
Attention: Flexible elements tend to shrink when evacuated.
Due to the high compression ratio of the pumps, pressure at the outlet port might be generated being higher than the max. permitted pressure compatible with the mechanical stability of the system.
Comply with maximum permitted pressures and pressure differences, see section ”Technical data”. Do not operate the pump with overpressure at the inlet.
Do not permit any uncontrolled pressurizing (e. g. make sure that the exhaust pipeline cannot become blocked). If you have an exhaust-isolation valve, make sure that you cannot operate the equipment with the valve closed. Risk of bursting!
Ensure that the system design does not allow the exhaust pipeline to become blocked.
Max. permitted pressure at the pressure transducer: 2 bar (absolute).
Ensure that the system design does not allow the coolant outlet pipeline to become blocked.
Secure coolant hoses at the hose nozzles (e.g. with hose clip) to prevent their accidental slipping.
Check liquid level in both catchpots regularly and drain condensate in time.
Check the overpressure safety relief device at the exhaust waste vapour condenser in appropriate intervals.
Avoid overpressure of more than 0.2 bar in case inert gas is connected.
The diameter of the inlet and outlet pipeline should be at the least as large as the diameter of the pump connection pipelines.
To the best of our knowledge the equipment is in compliance with the requirements of the applicable EC-directives and harmonized standards (see “Declaration of conformity”) with regard to design, type and model, especially directive IEC 1010.This directive gives in detail conditions, under which the equipment can be operated safely (see also IP degree of protection).
Adopt suitable measures in case of differences, e. g. using the equipment outdoors, installation in altitudes of more than 1000 m above mean sea level, conductive pollution or dewiness.
Pay attention to symbol ”hot surfaces” on the equipment.
Adopt suitable measures to prevent any danger arising from the formation of hot surfaces or electric sparks.
The pumps are not suitable to pump dangerous or explosive gases or explosive or flammable mixtures. Ensure that the materials of the wetted parts are compatible with the pumped substances, see section “Technical data”.
Adopt suitable measures to prevent the release of dangerous, explosive, corrosive or polluting fluids.
Use inert gas for gas ballast or venting if necessary.
The user must take suitable precautions to prevent any formation of explosive mixtures in the expansion chamber. In case of a diaphragm crack, mechanically generated sparks, hot surfaces or static electricity may ignite these mixtures.
Take adequate precautions to protect people from the effects of dangerous substances (chemicals, thermal decomposition products of fluoroelastomers), wear appropriate safety-clothing and safety glasses.
Comply with applicable regulations when disposing of chemicals.Take into consideration that chemicals may be polluted.
In case of overload the motor is shut down by a thermal cutout in the winding.
Manual reset is necessary. Switch off the pump or isolate the equipment from mains. Wait approx. five minutes before restarting the pump.
Avoid high heat supply (e. g. due to hot process gases).
Ensure sufficient air admittance if pump is installed in a housing.
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully the validity of this document with respect to his product. manual-no.: 999034 / 22/04/2008
page 6 of 51
Attention: In case of supply voltage below 100V, the lock of the cutout might be restricted and the pump might restart on its own after sufficient cooling down.Take suitable precautions, if an automatic restart of the pump may lead to a critical dangerous situation.
Due to the residual leak rate of the equipment, there may be an exchange of gas, albeit extremely slight, between the environment and the vacuum system.
Adopt suitable measures to prevent contamination of the pumped substances or the environment.
Pumping at high inlet pressure may lead to overpressure at the gas ballast valve.
Pumped gases or condensate might be pushed out in case the valve is open.
If an inert gas supply is connected, ensure that the inlet pipeline is not contaminated.
The controller is equipped with a short circuit proof transformer with an integrated overload protection (no fuses).
Failure of the pump (e. g. by power failure) or connected components, parts of the supply (e. g. coolant) or change of parameters (e. g. increase of pressure in the coolant system) must not lead to a critical dangerous situation under any circumstances.
Electronic equipment is never 100% fail-safe. This may lead to an indefinite status of the equipment. Provide protective measures against disfunction and failure.
Operating the pump with high or low frequency, stand still of the pump or operating the venting valve must not lead to a critical dangerous situation under any circumstances.
Ensure that in case of failure the pump and the vacuum system always will turn into a safe status.
In case of diaphragm cracks or leaks in the manifold pumped substances might be released into the environment or into the pump housing.To reduce the risk of leaks, ask for a diaphragm pump with additional safety diaphragm.
Comply especially with notes on operation and use and maintenance.
Use only genuine spare parts and accessories.
Otherwise safety and performance of the equipment as well as the electromagnetic compatibility of the equipment might be reduced.
Possibly the CE mark becomes void if not using genuine spare parts.
Ensure that maintenance is done only by suitable trained and supervised technicians. Ensure that the maintenance technician is familiar with the safety procedures which relate to the product processed by the vacuum system and that the equipment, if necessary, is appropriately decontaminated before starting maintenance.
Comply with local and national safety regulations.
Wear parts have to be replaced regularly. In case of normal wear the lifetime of the diaphragms and valves is > 10000 operating hours. Bearings have a typical durability of 40000 h.
Isolate equipment from mains and wait two minutes before starting maintenance to allow the capacitors to discharge.
Before starting maintenance, wait two minutes after isolating the equipment from mains to allow the capacitors to discharge.
Ensure that the pump cannot be operated accidentally. Never operate the pump if covers or other parts of the pump are disassembled. Never operate a defective or damaged pump.
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully the validity of this document with respect to his product. manual-no.: 999034 / 22/04/2008
page 7 of 51
Attention: The pump might be contaminated with process chemicals which have been pumped during operation. Ensure that the pump is decontaminated before maintenance and take adequate precautions to protect people from the effects of dangerous substances if contamination has occurred.
Before starting maintenance vent the pump, isolate the pump and other components from the vacuum system. Allow sufficient cooling of the pump. Drain condensate, if applicable. Separate the pump from the coolant circuit.
Repair of the gauge head VSK 5 is not possible.
In order to comply with law (occupational, health and safety regulations, safety at work law and regulations for environmental protection) vacuum pumps, components and measuring instruments returned to the manufacturer can be repaired only when certain procedures (see section ”Notes on return to the factory”) are followed.
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully the validity of this document with respect to his product. manual-no.: 999034 / 22/04/2008
page 8 of 51
Technical data
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MZ 2C |
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MD 4C |
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Type |
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VARIO / |
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VARIO / |
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PC 2003 |
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PC 2002 |
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PC 2004 |
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VARIO |
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VARIO |
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VARIO |
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Maximum pumping speed* |
m3/h |
2.5** |
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3.8** |
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2.5** |
(ISO 21360) |
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Ultimate vacuum* (absolute) |
mbar |
9 |
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2 |
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0.6 |
Ultimate vacuum* (absolute) |
mbar |
15 |
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4 / 9 |
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2 |
with gas ballast |
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Max. permissible outlet pressure |
bar |
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1,1 |
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(absolute) |
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Max.permissible pressure at gas |
bar |
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1,2 |
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ballast connection (absolute) |
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Permissible ambient temperature |
°C |
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-10 to +60 / +10 to +40 |
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storage / operation |
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Permissible relative atmospheric |
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moisture during operation |
% |
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30 to 85 |
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(no condensation) |
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Nominal power |
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100-120 V~ 50/60 Hz |
kW |
0.33 |
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0.575 |
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0.575 |
230 V~ 50/60 Hz |
kW |
0.33 |
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0.575 |
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0.575 |
No-load speed |
min-1 |
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30 - 2400 |
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Maximum current |
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100-120 V~ 50/60 Hz |
A |
2.7 |
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4.2 |
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4.2 |
230 V~ 50/60 Hz |
A |
1.5 |
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2.5 |
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2.5 |
Typical operational current*** |
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(at ultimate vacuum) |
A |
1.0 |
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1.1 |
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1.1 |
100-120 V~ 50/60 Hz |
A |
0.6 |
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0.7 |
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0.7 |
230 V~ 50/60 Hz |
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Maximum permissible range of |
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100-120 V~ +5%/-10% 50/60 Hz |
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supply voltage |
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230 V~ +/-10% 50/60 Hz |
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Attention: Observe |
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specifications of rating plate! |
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Motor protection |
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thermal cutout |
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Degree of protection IEC 529 |
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IP 20 |
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Inlet |
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hose nozzle NW 10 |
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Outlet |
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hose nozzle NW 10 |
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Cooling water connection |
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hose nozzle NW 6 |
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(Pumping unit) |
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Dimensions L x W x H |
mm |
345 x 241 x 235 / |
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345 x 241 x 235 / |
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385 x 265 x 530 |
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mm |
385 x 265 x 530 |
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385 x 275 x 530 |
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Weight approx. |
kg |
16.8 / 21,4 |
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19.7 / 24.2 |
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24.1 |
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*Technical data according to EN 61010-1 and EN 1012-2 .The pump achieves its ultimate pumping speed and ultimate vacuum only at operating temperature (after approx.15 min.).
**Pumping speed of diaphragm pump
***Typical current draw in mode ”Continuous pumping” and frequency ”HI”.
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully the validity of this document with respect to his product. manual-no.: 999034 / 22/04/2008
page 9 of 51 |
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Controller |
CVC 2000II |
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Pressure transducer |
external, capacitive absolute pressure |
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transducer made of aluminiumoxide ceramic |
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Electronic scale conversion (selectable) |
mbar, Torr or hPa |
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Measurement range |
1 mbar - 1100 mbar (1 Torr - 825 Torr) |
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Max. pressure control range* |
1 mbar - 1060 mbar (1 Torr - 795 Torr) |
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Operation frequency range of the motor |
1.0 - 60.0 Hz at steps of 0.5 Hz |
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and additional "HI" (max. 80 Hz) |
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Uncertainty (with transducer carefully |
<+/-1 mbar (1 Torr) +/-1 digit |
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calibrated and at constant temperature) |
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Temperature coefficient |
<+/- 0.07 mbar/K (0.05 Torr/K) |
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Degree of protection pressure transducer |
IP 54 |
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according to IEC 529 |
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Max. permitted pressure at the pressure |
1.5 bar (1125 Torr) |
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transducer (absolute) |
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Max. permitted temperature of gaseous media |
for short periods up to 80°C |
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Serial interface |
RS 232 C |
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*The actual vacuum control range in your special application might be reduced due to ultimate vacuum of the pump, quantity of gas occurring etc.
Components |
Wetted parts |
Pumping unit |
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Outlet |
ETFE/ECTFE / PET |
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Inlet (MZ 2C/MD 4C/PC 2002 VARIO) |
ETFE / ECTFE |
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Inlet (PC 2003/2004 VARIO) |
PP |
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Hose |
PTFE |
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Fitting |
ETFE / ECTFE |
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O-rings at the catchpot |
FPM |
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Overpressure safety relief device |
silicon rubber / PTFE foil |
Catchpot cover plate |
PP |
Exhaust waste vapour condenser, collecting flask |
borosilicate glass |
Pump |
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Housing cover insert |
PTFE carbon reinforced |
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Head cover |
ETFE carbon fibre reinforced |
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Diaphragm clamping disc |
ETFE carbon fibre reinforced |
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Valve |
FFKM |
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Diaphragm |
PTFE |
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O-ring |
FPM |
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VSK 5 |
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Seal |
chemically resistant fluoroelastomer |
Pressure transducer housing |
PTFE duroplastic reinforced |
Pressure transducer |
Aluminuimoxide ceramic |
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We reserve the right for technical modification without prior notice!
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully the validity of this document with respect to his product. manual-no.: 999034 / 22/04/2008
page 10 of 51
Gas inlet temperatures:
Operating condition |
Inlet pressure |
Permitted range of gas |
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temperatures at inlet |
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Continuous operation |
> 100 mbar (high gas load) |
+10°C to +40°C |
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Continuous operation |
< 100 mbar (low gas load) |
0°C to +60°C |
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Short-time operation (< 5 minutes) |
< 100 mbar (low gas load) |
-10°C to +80°C |
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Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully the validity of this document with respect to his product. manual-no.: 999034 / 22/04/2008
MZ 2C VARIO
gas ballast valve
inlet
pump MZ 2C
with frequency converter
MD 4C VARIO
gas ballast
pump MD 4C with frequency
page 11 of 51
rating plate
outlet
trip line and power supply of the frequency converter
controller CVC 2000II |
pressure transducer VSK 5 |
rating plate
supply of converter
Controller CVC 2000II
pressure transducer VSK 5
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully the validity of this document with respect to his product. manual-no.: 999034 / 22/04/2008
page 12 of 51
PC 2002 VARIO
Kühlmittelrückführung (Schlauchwelle 6 mm)
Kühlmittelzuleitung (Schlauchwelle 6 mm)
exhaust waste vapour condenser with cover
overpressure safety relief device at the exhaust waste vapour condenser
round bottom flask 
to collect condensate
PC 2003 VARIO / 2004 VARIO
coolant outlet (hose nozzle 6 mm)
coolant inlet
(hose nozzle 6 mm) 
exhaust waste vapour condenser 
with cover
overpressure safety relief device at the exhaust waste vapour condenser
round bottom flask to collect condensate
Controller CVC 2000II
pump MZ 2C VARIO with frequency converter
inlet (vacuum connection)
pressure transducer VSK 5
Controller CVC 2000II
pump MD 4C VARIO or MV 2C VARIO with frequency converter
inlet (vacuum connection)
pressure transducer VSK 5
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully the validity of this document with respect to his product. manual-no.: 999034 / 22/04/2008
page 13 of 51
Description
The controller can be adapted to the specific application by choosing another mode than ”Vacuum control” (factory-set), see section ”General view modes”.
The status of the controller respectively of the connected accessories is displayed by corresponding symbols on the LCD. After switching on the version of the software is displayed, than the mode as well as the symbols “coolant valve” and “venting valve”, if the valves are preselected.
General view display
modes mode vacuum control or |
time |
pump symbol |
coolant valve |
continuous pumping |
counter |
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venting valve |
automatic mode |
mode VACUU•LAN |
warning (in combination with |
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other symbols) |
remote operation |
process control
active
Pressure reading
selectable pressure units
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully the validity of this document with respect to his product. manual-no.: 999034 / 22/04/2008
page 14 of 51
Keys
•setting frequency
•setting time for switch-off (only VACUU•LAN)
•switching (toggling) in setups
•”key ▲” or ”key ▼”
•operating venting valve (only if valve is connected and preselected)
• pressure setting (only vacuum control) |
• start or stop of process control or |
• adapting process pressure |
• confirmation of selected values or mode |
• ”key p▲” or ”key p▼” |
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•switch on/off automatic mode (only vacuum control)
•special function (in combination with another key)
Rear side CVC 2000II
female connector to connect the gauge head VSK 5
connection power supply frequency
converter serial interface RS 232 C
mains switch
connection mains 
cable
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female connector to connect a coolant |
female connector to connect |
valve and/or a venting valve |
trip line frequency converter |
thread M8 for stand rod |
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(included) |
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully the validity of this document with respect to his product. manual-no.: 999034 / 22/04/2008
page 15 of 51
Notes on operation
Installing in a vacuum system:
Avoid throttling losses by using connecting pipes with large diameter and keep them as short as possible.
Reduce the transmission of vibration and prevent loading due to rigid pipelines. Insert elastic hoses or flexible elements as couplings between the pump and rigid pipes. Attention: Flexible elements tend to shrink when evacuated.
Use a suitable valve to isolate the pump from the vacuum system to allow the pump to warm up before condensable vapours are pumped or to clean the pump before it is switched off.
Connect the exhaust to a suitable treatment plant to prevent the discharge of dangerous gases and vapours to the surrounding atmosphere. Use a catchpot to prevent the drainage of contaminated condensate back into the pump.
Prior to use:
Max. ambient temperature: 40 °C
Make sure ventilation is adequate if pump is installed in a housing or if ambient temperature is elevated. Keep a distance of min. 20 cm between fans and ambient parts.
If pump is installed in altitudes of more than 1000 m above mean sea level check compatibility with applicable safety requirements, e. g. IEC 60034 (motor may overheat due to insufficient cooling).
When assembling, ensure vacuum-tightness. After assembly, check the complete system for leaks.
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PC 2002 VARIO / PC 2003 VARIO / PC 2004 VARIO: |
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with separator at the inlet and exhaust waste vapour condenser at the outlet: |
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Round bottom flasks: |
overpressure |
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The catchpot at the inlet prevents droplets and particles from |
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safety relief |
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device |
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entering the pump. |
catchpot |
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Lifetimes of diaphragms and valves are enhanced. |
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Improves vacuum in case of condensation. |
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at outlet |
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Both round bottom flasks are coated with a protective layer to |
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catchpot |
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prevent disintegration in case of breakage or implosion. |
at inlet |
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Assemble the catchpots at the inlet and at the outlet using |
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joint clips. |
outlet |
Exhaust waste vapour condenser: |
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Assemble hose nozzles for coolant inlet and coolant outlet |
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(gas!; hose nozzle 10 mm) |
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pipelines at the exhaust waste vapour condenser. |
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coolant outlet |
The exhaust waste vapour condenser enables an efficient |
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condensation of the pumped vapours at the outlet. |
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(hose nozzle 6 mm) |
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No backflow of condensates. |
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coolant inlet |
Controlled recovery of condensates. |
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Next to 100% solvent recovery. |
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(hose nozzle 6 mm) |
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The isolation cover protects against glass splinters in case of breaking, acts as thermal isolation to avoid condensation of humidity and is intended to absorb shocks.
Attach the pipelines of the coolant circuit to the respective hose nozzles (see image) at the waste vapour condenser. Check hose connections prior to starting operation of the cooling system.
Secure coolant hoses at the hose nozzles (e.g. with hose clip) to prevent their accidental slipping.
Ensure that the coolant outlet pipeline is always free and that it cannot get blocked.
The gas outlet (hose nozzle 10 mm) must not be blocked.The exhaust pipeline has always to be free and pressureless to enable an unhindered discharge of gases.
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully the validity of this document with respect to his product. manual-no.: 999034 / 22/04/2008
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Connect the exhaust to a suitable treatment plant to prevent the discharge of dangerous gases and vapours to the surrounding atmosphere.
Connecting the pressure gauge:
female connector to connect gauge head
VSK 5
gauge head VSK 5
Connect the cable of the gauge head to the female connector at the rear side of the vacuum controller.
Connect the gauge head to the vacuum system by using a small flange connection or a hose connection.
The device is adjusted together with the gauge head at the factory. If the gauge head is replaced a readjustment is recommended.
Connect cable from the frequency converter of the pump to the controller (rear side): trip line and power supply of the frequency converter.
Max. permitted pressure at the pressure transducer: 1.5 bar (absolute).
The display flashes at a pressure higher than 1100 mbar.
Comply with max. permitted pressure.
Inside a vacuum system where evaporation occurs, e. g. rotary evaporator, the vacuum is not uniform, e. g. a condenser acts as pump or the vacuum in the pipeline is lower than in the system.Therefore carefully choose position where to connect the gauge head.
Condensate and deposits in the pressure transducer affect the measuring result.
In case of deposits, aggressive or condensable media, install a gas washing bottle before the pressure transducer if necessary.
In order to avoid malfunction it is important to position the pressure transducer in the vacuum line so as to avoid flow of condensate towards the pressure transducer.
Clean pressure transducer if necessary, see section “maintenance“.
Preselections at the controller, see section “Modes“.
Use and operation of the controller see section “How to operate the controller”.
Setting of interface parameters, see section “Interface“.
Before operation MZ 2C VARIO / MD 4C VARIO:
Connect cable from the frequency converter of the pump to the controller (rear side): trip line and power supply of the frequency converter.
During operation:
Do not start pump if pressure difference between inlet and outlet port exceeds max. 1 bar. Attempts to start pump at higher difference may cause blockade and damage of the motor.
Check compatibility with max. permitted pressure at outlet and max. pressure difference between inlet and outlet ports.
Due to the high compression ratio of the pumps, pressure at the outlet port might be generated being higher than the max. permitted pressure compatible with the mechanical stability of the system.
The pump achieves its pumping speed, ultimate total vacuum and vapour pumping rate only at operating temperature (after approx. 15 minutes).
Prevent internal condensation, transfer of liquids or dust.The diaphragm and valves will be damaged, if liquids are pumped in significant amounts.
Let the pump run with gas ballast to reduce condensation of pumped substances (water vapour, solvents, ....) in the pump.
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully the validity of this document with respect to his product. manual-no.: 999034 / 22/04/2008
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