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Piping The Air Compressor - Hitachi SRL Series Instruction Manual

Oilfree scroll compressor
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Installation(continued)

4 Piping the Air Compressor

1. Ensure that a properly sized air receiver is installed (80 gallons or more). Without a properly sized air
receiver it is possible that the air compressor can be damaged due to excessive starts and stops.
2. Use a textile reinforced, heat resistant rubber hose (hydraulic) of appropriate rating to connect the
Oilfree Scroll Air Compressor to the plant air system piping.
Safety Relief Valve
● If a stop valve is installed
in the middle of the
compressed air piping,
install a safety relief valve
between the air
compressor and the stop
valve.
Hose Fitting
● Use an appropriate
rubber hose to connect
with the equipment.
● Use a heat resistant, pressure tight rubber hose to connect the Oilfree Scroll Air Compressor to the
plant air system piping. The rubber hose will prevent damage to the plant air system piping due to
vibration.
● Use of an improper rubber hose may lead to cracks and/or leaks due to hose deterioration.
● Do not operate the air compressor when the stop valve between the air receiver and the air
compressor is closed.
● Do not install heavy objects, such as drain traps and filters, to the compressed air discharge as they
may damage the discharge line of the air compressor.
● If a remote vertical air receiver is installed, it is recommended to attach the air receiver to the ground
with foundation bolts.
■ It is necessary to install a properly sized air receiver to this compressor in order to reduce excessive
starts and stops.
■ Without a properly sized air receiver, it is possible that the main motor or electromagnetic contactor may
receive unwarranted wear due to excessive starts and stops.
● Without a properly sized air receiver, it is possible that a serious accident may occur due to the
unwarranted wear of the main motor or electromagnetic contactor.
● For the protection of the air compressor, if excessive starts and stops occur the compressor will
shut off and display : cycle error [E.CY]. This will stop the supply of compressed air.
● The error message cycle error [E.CY] is an indication that the volume of air receiver is insufficient
for proper operation. An increase in the volume of the air receiver will eliminate the cycle error [E.CY].
Vertical Air Receiver
● To avoid damage to the air
compressor due to excessive
starts and stops, a properly sized
air receiver must be installed.
WARNING
WARNING
7
Stop Valve
● Make sure to install a
stop valve between the air
compressor and the air
receiver.
Rubber Hose

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