While Operating The Air Compressor; When Stopping The Air Compressor - Hitachi NEXT Series Instruction Manual

Oil-free rotary screw air compressor
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3.5.3 While Operating the Air Compressor

AUTO
MONITOR
MENU
+/−
UP/ 
DOWN
SET
MONITOR

3.5.4 When Stopping the Air Compressor

DIS. PRESS:      100 psi
INTSTG. P:         22psi
OIL PRESS:        22psi
CLT PRESS:           **psi
3. OPERATING PROCEDURE [Daily Operation of Air Compressor]
RUNNING CONTROL
RUNNING MODE
REMOTE
POWER
ALARM
LOAD
[× 10h]
RESET
AUTO START
FUNC
SHUTDOWN
REMOTE
SELECT/WIDE
START
STOP
STR
1
2
UNLOAD STOP
RUNNING CONTROL
RUNNING MODE
REMOTE
POWER
ALARM
LOAD
RESET
AUTO START
FUNC
SHUTDOWN
REMOTE
SELECT/WIDE
START
STOP
STR
UNLOAD STOP
[Rear View]
① Check the LCD for operating pressures and
temperatures, and verify that:
-
Interstage pressure (INTSTG P), oil pressure (OIL PRES),
1st stage discharge air temperature (DIS. TEMP 1), 2nd
stage discharge air temperature (DIS. TEMP 2), oil
temperature (OIL TEMP) and 2nd stage suction
temperature (2ND SUCT. T) stays within the normal range.(
 6.1.3)
② Verify that the intercooler/aftercooler condensate
drain is discharged intermittently when the air
compressor is loading.
③ When the air compressor is unloading, condensate
drain is discharged one (1) second a five (5)
minutes.
① Press the UNLOAD STOP button to stop the air
compressor.
  T he air compressor unloads for 5 minutes and stops.
(In the case of an emergency, pr ess the
EMERGENCY STOP button.)
② Check the pressure after the air compressor stops
running.
-
Both oil pressure and interstage pressure shall be 0 psi
( The pressures may be 1 psi depending on operation
conditions.)
③ Check the sight glass on the control line filter to
confirm that drain is properly discharged. (Fixed-
speed type)
④ Close the valve on the discharge side.
Water-Cooled
⑤ Close the cooling water stop valve. Open the
petcock and cooling water drain valve to drain the
cooling water from the air compressor. Be careful
not to damage the parts, such as coolers and casing,
by cooling water freezing.
33

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