There must be a source of power whose voltage is as specified +/- 10 %.
The power plug must never be disconnected day and night.
The machine must not be in an area subject to high humidity, near a water faucet, water boiler, humidifier.
The site must not be cold or subject to dust.
The machine must not be near a source of fire.
The site must not be subject to ammonium gas.
The machine must not be exposed to the rays of the sun.
As necessary, curtains must be provided.
The area must be well ventilated.
The machine must be on a level floor.
In addition, be sure that there is a source of power that can be used by the machine at all times.