/ PM6
k
m
v
w
r
q
f
h
s
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.
5. Cooling water inlet at (C) and cooling water outlet at (D).
Initial Operation
1. Initially switch the pump on for a few seconds only 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 utilising the oil filler port (H) to the
correct level (see sight glass (l)). On no account open the oil filler port (H) when the pump is operating.
3. Connect suction pipes at (A
1
) and (A
2
).
4. Connect pipes for cooling water inlet at (C) and cooling water outlet at (D).
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 on 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 breathing of these mists may result in health problems, therefore it is extremely important to make sure that the
installation area is well ventilated.
Maintenance and Servicing
When maintaining these units and having such situations where personnel could be hurt by moving parts or by live electrical parts the pump must
be isolated by totally disconnecting the electrical supply. It is imperative that the unit cannot be re-started during the maintenance operation.
Do not work a pump that is at its normal operating temperature as there is a danger from hot parts or hot lubricant.
1. Air filtration
Attention! The capacity of the pump can become reduced if the air inlet filters are not maintained correctly.
Filter on the suction side: Mesh filter of the 1. vacuum connection (A
1
) and 2. vacuum connection (A
2
) must be cleaned regularly depending upon the amount of
contamination. Cleaning can be carried out by washing out or by blowing out with compressed air. Replace filters if contaminated completely.
Filter for Gas ballastl: The VVB is equipped with a gas ballast valve (U). The built in filter cartridge must be cleaned regularly depending upon the amount of contamination.
By removing the screw (s) and plastic cap (h) the filter elements can be removed for cleaning. The filter cartridge (f) can be cleaned by blowing out with compressed air..
2. Lubrication
Check the oil level regularly depending upon the operating hours. First oil change after 500 operating hours (see oil drain plug (K)). Further changes every 500 operating
hours. The oil change times should be shortened if the application is dusty. Only oils corresponding to DIN 51 506 group VC / VCL or a synthetic oil (obtainable from
Rietschle) should be used. The viscosity must correspond to ISO-VG 100 according to DIN 51 519. The recommended Rietschle Oil types are: MULTI-LUBE 100 (mineral
oil); SUPER-LUBE 100 (synthetic oil) (see oil type plate (M)). When the oil is under a high thermal load, e.g. ambient or suction temperatures over 30°C, unfavourable
cooling or operating with increased speed etc., the oil change time can be extended by using the recommended synthetic oil.
Attention! Old and used oil must be disposed of corresponding with the relevant health, safety and environmental laws.
If the oil brand is changed, the old oil must be drained completely from the oil separator housing..
3. Oil separation
Extremely blocked filter elements will result in an increased pump temperature and will cause discolouration of the lubricant.
The oil separator elements may become contaminated after a long period of operation which can result in high pump temperature and motor overload. We therefore
recommend that the the filter elements (L) be changed every 2000 operating hours. It is not possible to clean these elements.
To change filters: Remove oil separator housing cover (Y). Remove plastic fixings and exchange the elements (L). If possible re-use the o-ring for re-assembly. Re-
assembly in reverse order.
4. Coupling
The coupling rubbers (k) are wearing parts and should be checked regularly. When the coupling rubbers are worn this can be detected by a knocking sound when the
vacuum pump is started.
Attention! Defective coupling rubbers can cause extensive damage and even in some extreme cases break the rotor shaft.
To check the coupling, pull off the motor. If the coupling rubbers (k) are damaged exchange rubbers . Check the coupling bolts (r) for any wear and replace if necessary.
To replace remove fan cover (w), pull off the coupling (q) and fan (v) complete from the pumpshaft.
Appendix:
Repair on Site: For all repairs on site an electrician must disconnect the motor so that an accidental start of the unit cannot happen.
All engineers are recommended to consult the original manufacturer or one of the subsidiaries, agents or service agents. The address of the closest repair workshop
can be obtained from the manufacturer on application.
After a repair or before re-installation, follow the instructions as shown under the headings Installation and Initial Operation.
Lifting and Transport: To lift and transport the vacuum pump the eye bolts on the pump and motor must be used. If an eye bolt is missing use suitably rated strops. The
weight of the pumps are shown in the accompanying table.
Storage: VVB units must be stored in dry ambient conditions with normal humidity. If a pump needs to be stocked for a period longer than 3 months we would recommend
to using an anticorrosion oil rather than the normal lubricant.
Disposal: The fast wearing parts (as listed in the spare parts lists) should be disposed of with due regard to health and safety regulations.
Gas ballast valve G
1
/
2
1.2001
