Hitachi NEXT Series - Page 53

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6. STARTUP OPERATION [Startup Operation of the Air Compressor]
① Press the UNLOAD STOP button to stop the air
compressor. Operation stops when the air end and the
air piping have dried for 5 minutes. To stop the
compressor immediately without unloading, press the
STOP button.
② Check the LCD for pressures, and verify that:
Oil pressure, interstage air pressure, 0 psi (0 MPa) or
1 psi (0.01 MPa) depending on your operating
conditions).
③ Check the condensate drain discharge from the
control line filter by checking the sight glass on the
control line filter. (Fixed speed type)
④ Close the stop valve.
⑤ Open the water drain valve. Do not fail to drain the
cooling water specifically winter season because the
remaining water may be frozen inside and as a result
the casing and/or coolers may be burst.
RUNNINGCONTROL
運転管理
RUNNINGMODE
ALARM
警 報
運転状況
故 障
LOAD
SHUTDOWN
REMOTE
負 荷
遠 方
電 源
POWER
起動待ち
AUTOSTART
停 止
STOP
運 転
START
1
2
記 憶
遠 方
REMOTE
表示切替／
ワイドモード
STR
機 能
FUNC
リセット
RESET
SELECT/WIDE
UNLOAD STOP
①
[Rear View]
④
DIS.PRESS: ０ｐｓｉ
INTSTGP: 
０ ｐｓｉ
OILPRES: 
０ ｐｓｉ
CLTPRES:＊.＊＊ｐｓｉ
②
③
Proper Pressure/Temperature Indications on LCD
LCD Indication Unit
DSP-45/55/75ATN
DSP-45/55/75WTN
DSP-55/75VATN
DSP-55/75VWTN
Operating State Working Pressure - Loading Unloading Loading Unloading
Discharge pressure
100 psi (0.69 MPa)
psi (MPa)
100 (0.69) or less
85 - 100 (0.59 - 0.69) 103 (0.71) or less
125 psi (0.86 MPa) 125 (0.86) or less
110-125 (0.76 -0.86) 128 (0.88) or less
Interstage pressure psi (MPa)
25 - 38 (0.17 -0.26) -11 - 0 (0.08-0) 25 - 42 (0.17 -0.29) 3 - 15 (0.02 -0.1)
Oil pressure
100 psi (0.69 MPa)
psi (MPa)
＊19 - 26 (0.13 - 0.18)
＊13 - 26 (0.09 - 0.18)
(op. freq.: 110 Hz or more)
125 psi (0.86 MPa)
7 - 23 (0.05 - 0.16)
(op. freq.: 110 Hz or less)
LCD Indication Unit
DSP-45/55/75ATN
DSP-45/55/75WTN
DSP-55/75VATN
DSP-55/75VWTN
Operating State Working Pressure - Air-cooled Water-cooled Air-cooled Water-cooled
1st-Stage Discharge
Air Temperature
100 psi (0.69 MPa)
°F(°C)
426 (219) or less 408 (209)or less 426 (219) or less 408 (209 or less)
125 psi (0.86 MPa) 426 (219) or less 408 (209) or less 426 (219) or less 408 (209) or less
2nd-Stage Discharge
Air Temperature
100 psi (0.69 MPa)
°F(°C)
435 (224) or less 417 (214) or less 435 (224) or less 417 (214) or less
125 psi (0.86 MPa) 489 (254) or less 471 (244) or less 489 (254) or less 471 (244) or less
Oil temperature °F(°C) 153 (67) or less 147 (64) or less 153 (67) or less 147 (64) or less
2nd-Stage Suction
Air Temperature
°F(°C) 153 (67) or less 147 (64) or less 153 (67) or less 147 (64) or less
Note) ＊ The oil pressure may exceed 26 psi (0.18 MPa) temporarily when starting. The oil pressure may exceed 26 psi (0.18 MPa) temporarily
when PQ wide mode ON for Vtype. These are normal.
6.1.4 Stopping
Water-Cooled