6 Operation
6.1 Putting the vacuum pump into operation
Before switching on
1. Check the lubricant levels on both sight glasses.
2. Compare the voltage and frequency specifications on the motor rating plate with the available
mains voltage and frequency.
3. Make sure that the suction chamber is free from all foreign matters.
4. Check the vacuum pump for visible damage and put the vacuum pump into operation only in a
correct state.
5. Protect the vacuum pump from sucking in contamination using suitable measures (e.g. dust filter).
6. Make sure that the shut-off units on the pressure side open before starting the pump.
7. Open the cooling water flow and ensure the flow rate.
8. If necessary, vent the cooling chambers.
6.2 Switching on the vacuum pump
WARNING
Danger of poisoning due to emission of toxic process gases from the exhaust
During operation with no exhaust line, the vacuum pump allows exhaust gases and vapors to escape
freely into the air. In processes involving toxic media, there is a risk of injury and danger to life due to
poisoning.
► Observe the relevant regulations for handling toxic substances.
► Safely purge toxic process gases via an exhaust line.
► Use suitable filter equipment to separate toxic substances.
CAUTION
Danger of burns on hot surfaces
Depending on the operating and ambient conditions, the surface temperature of the vacuum pump
can increase to above 70 °C.
► Provide suitable touch protection.
CAUTION
Health hazard from increased noise emission
Remaining in the close proximity of the vacuum pump for a sustained period of time may cause hear-
ing damage.
► Ensure adequate sound insulation.
► Wear hearing protection.
NOTICE
Property damage from impermissibly high pressure in the vacuum system
Excessive pressure following the failure of the backing pump may damage the motor, pump seals,
and cooling system.
► Where possible, switch off the roots pump immediately if the backing pump fails.
Depending on the application, the roots pump can discharge directly to the atmosphere as single pump
or be operated together with a backing pump in a roots pumping station.
Procedure with independent operation of the roots pump
You can switch on the vacuum pump in every pressure range, between atmospheric pressure and ulti-
mate pressure.
1. Switch the vacuum pump on the on-site side via respective start-up switching (e.g. protective cir-
cuit).
Operation
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