Ingersoll-Rand DOOSAN HP375WCU, Operation & Maintenance Manual, Page: 13 / 73

Safety Operation & Maintenance Manual
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Compressed Air
Compressed air can be dangerous if incorrectly handled. Before doing any work on the unit,
ensure that all pressure is vented from the system and that the machine cannot be started
accidentally.
Ensure that the machine is operating at the rated pressure and that the rated pressure is
known to all relevant personnel.
All air pressure equipment installed in or connected to the machine must have safe working
pressure ratings of at least the machine safety valve setting.
If more than one compressor is connected to one common downstream plant, effective check
valves and isolation valves must be fitted and controlled by work procedures, so that one
machine cannot accidentally be pressurized or over pressurized by another.
Compressed air must not be used for a direct feed to any form of breathing apparatus or mask.
High Pressure Air can cause serious injury or death. Relieve pressure before removing filler
plugs/caps, fittings or covers.
Air pressure can remain trapped in air supply line which can result in serious injury or death.
Always carefully vent air supply line at tool or vent valve before performing any service.
The discharged air contains a very small percentage of compressor lubricating oil and care
should be taken to ensure that downstream equipment is compatible.
If the discharged air is to be ultimately released into a confined space, adequate ventilation
must be provided.
When using compressed air, always use appropriate personal protective equipment.
All pressure containing parts, especially flexible hoses and their couplings, must be regularly
inspected, be free from defects and be replaced according to the Manual instructions.
Avoid bodily contact with compressed air.
The safety valve located in the separator tank must be checked periodically for correct
operation.
Whenever the machine is stopped, air will flow back into the compressor system from devices
or systems downstream of the machine unless the service valve is closed. Install a check valve
at the machine service valve to prevent reverse flow in the vent of an unexpected shutdown
when the service valve is open.
Disconnected air hoses whip and can cause serious injury or death. Always attach a safety
flow restrictor to each hose at the source of supply or branch line in accordance with OSHA
Regulation 29CFR Section 1926.302(b).
Never allow the unit to sit stopped with pressure in the receiver-separator system.