1.4 Vacuum and Gauge Pressure Safety
In order to avoid dangerous situations associated with vacuum and gauge
pressure, please utilize secure mounting elements, connections, lines, fittings,
and containers. Pipes/hoses must be securely connected to the inlet and
discharge connections. The inlet and discharge connections and the pipes/hoses
connected to them must not be closed, clogged, or soiled. Check regularly to
ensure that these connections and mountings are not becoming unseated. If
necessary, support pipes and hoses to ensure that there is no tension on the
connections. Failure to observe these precautions can lead to sudden
evacuation of hazardous fluids or dangerous suction that can pull hair or
clothing into the unit.
1.5 Installation/Start-up
The unit and any lines connected to it must be securely installed. In particular,
the feed pipes must be securely routed, e.g. in cable ducts, in the floor, etc.
If a separate control panel or other such interface will be used to start and stop
the unit, it should be installed in an area with an unobstructed view of the unit to
ensure that it is not switched on while being serviced.
Excess vibration can cause damage to the unit and/or unsafe conditions. Install
the unit on a solid foundation or a solid mounting surface. Check screw
glands/unions for strength and firm seating.
Cables and pipes should be installed in a recess in the floor or duct so they do
not present a tripping hazard.
To ensure sufficient cooling of the unit, ventilation screens and openings must
remain clear. Ensure that discharge air from other units cannot be pulled into the
unit.
Make sure that the inlet and pressure lines are clearly marked to avoid confusion.
Interchanged inlet and pressure lines can lead to damage to the unit and/or
serious injury.
Install a filter in the inlet pipe and replace it regularly. If particulates or debris
enter the unit, the blades of the impellers can be damaged and blades could
potentially break off, potentially creating a hazardous situation.
If re-starting the unit after it has been idle for a long period of time, measure the
insulation resistance of the motor. If values are less than 1 k ȍ per volt of nominal
voltage, the winding may be too dry.
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