Heidolph ROTAVAC valve control Mode D'emploi page 44

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Before connecting your item with the local power supply, make sure the item
has been designed for your local voltage; refer to data plate on item.
Connect your item with a grounded outlet only.
Turn power switch to OFF when item is out of use, or before disconnecting
from mains.
Refer to "hot surface" sticker on the pump.
Do not touch hot surfaces.
Repair work is limited to skilled personnel so authorized by Heidolph.
Your item needs a proper stand !
Make sure no part of your body is exposed to vacuum pressure.
Avoid uncontrolled overpressure. Hazard of bursting ! Keep exhaust pipes
clear of obstructions.
Due to non-compensated leak rate, a minor amount of gas exchange between
ambient and vacuum system may occur. Preclude contamination of
substances involved and environmental pollution.
At high intake pressures, due to high pump compression ratio, overpressure
may occur at the gas ballast valve. Valve being open, gas or condensate may
escape.
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