Suitability
The units VGA and VBC are suitable for use in the industrial field i.e. the protection equipment corresponds to EN DIN 294 table 4,
for people aged 14 and above.
These models can be used for the evacuation of a closed system or for a permanent vacuum from:
50 Hz
➝
VGA: 20 to 500 mbar (abs.)
•
VGC: 2 to 200 mbar (abs.)
60 Hz
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VGA: 20 to 400 mbar (abs.)
•
VGC: 2 to 150 mbar (abs.)
When permanently operating the pumps outside these ranges, there may be oil seepage at the exhaust port. If closed systems are evacuated from
atmospheric pressure down to a suction pressure close to the ultimate vacuum, there is no problem with the oil system, providing the vacuum limit
can be achieved within a 10 minute pump down time.
Amounts of water vapour may be handled. Water, other liquids, aggressive or inflammable gases and vapours may not be handled.
For water vapour tolerance, see information I 200.
Handling of inflammable or aggressive gases and vapours is only possible with special versions, if the safety instructions XE 2 are noted.
The ambient and suction temperatures must be between 5 and 40°C. For temperatures outside this range please contact your
supplier.
The standard versions may not be used in hazardous areas.
The back pressure on the exhaust port must not 0.1 bar.
For all applications where an unplanned shut down of the vacuum pump could possibly cause harm to persons or installations,
the corresponding safety backup system must be installed.
Handling and Setting up (pictures
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Pumps that have reached operating temperature may have a surface temperature at position (Q) of more than 70° C. WARNING!
Do Not Touch.
Oil filler port (H), oil sight glass (I) and oil drain plug (K) must all be easily accessible. The cooling air entries (E) and the cooling air exits (F) must
have a minimum distance of 15 cm from any obstruction. The discharged cooling air must not be re-circulated. For maintenance purposes we
recommend a space of 0.3 m in front of the filter (D) and oil tank cover (T).
The VGA and VGC pumps can only be operated reliably if they are installed horizontally.
For installations that are higher than 1000 m above sea level there will be a loss in capacity. For further advice please contact your
supplier.
When installed on a solid base, the pumps may be installed without fixing down. If the pumps are installed on a base plate, we would recommend
fitting anti-vibration mounts. This range of vacuum pumps are almost vibration free when in operating.
Installation (pictures
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For operating and installation follow any relevant national standards that are in operation.
1. The vacuum connection at (A). The air handled can be exhausted into the atmosphere through the exhaust port (B).
Long and/or small bore pipework should be avoided as this tends to reduce the capacity of the pump.
2. The lubricating oil (recommended brands see under servicing) should be put into the pump at the oil filler port (H) of the oil tank. Fill until the
oil reaches the centre of the oil sight glass (l).
After filling, make sure the oil filler port is closed..
3. The electrical data can be found on the data plate (N). The motors correspond to DIN/VDE 0530 and have IP 54 protection and insulation class F.
The connection diagram can be found in the terminal box on the motor (unless a special plug connection is fitted). Check the electrical data of
the motor for compatibility with your available supply (voltage, frequency, permissible current etc.).
4. Connect the motor via a motor starter. It is advisable to use thermal overload motor starters to protect the motor and wiring. All cabling used
on starters should be secured with good quality cable clamps.
We recommend that motor starters should be used that are fitted with a time delayed trip resulting from running beyond the amperage setting.
When the unit is started cold, overamperage may occur for a short time.
The electrical installation may only be made by a qualified electrician under the observance of EN 60204. The main switch must
be provided by the operator.
Initial Operation (picture
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1. Initially, switch the pump on and off for a few seconds to check the direction of rotation against the direction arrow (O).
2. Run the pump for two minutes with correct rotation. Stop pump and top up the oil using the oil filler port (H) to the correct level (see sight glass (l)).
On no account open the oil filler port when the pump is operating.
3. Connect the suction pipe at (A).
4. Vacuum regulating valve (optional extra VGA):
The vacuum can be adjusted by turning the regulating valve according to the symbols, as indicated on the top of the regulating valve.
Potential risks for operating personnel
1. Noise Emission: The worst noise levels considering direction and intensity measured according to DIN 45635 part 3 (as per 3. GSGV) are shown
in the table at the back. When working permanently in the vicinity of an operating pump, we recommend wearing ear protection to avoid any
damage to hearing.
2. Oil mist in the Exhaust Stream: Even with the high efficiency oil mist eliminator, the exhausted air could still contain extremely low amounts
of oil mist which can occasionally be detected by smell. Permanent inhalation of these mists may result in health problems, therefore it is
extremely important to make sure that the installation area is well ventilated.
