Hitachi NEXT Series Instruction Manual
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Hitachi NEXT Series Instruction Manual

Oil-free rotary screw air compressor
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INSTRUCTION MANUAL
HITACHI Oil-Free Rotary Screw Air Compressor
Air-cooled
DSP-45AT6N
DSP-55AT6N
DSP-75AT6N
DSP-55VATN
DSP-75VATN
[Without dryer type]
Water-cooled
DSP-45WT6N
DSP-55WT6N
DSP-75WT6N
DSP-55VWTN
DSP-75VWTN
[Without dryer type]
Prior to operation of this air compressor, ensure that all
operators read and understand this INSTRUCTION MANUAL
completely, thereby operating it safely and properly.
Place the INSTRUCTION MANUAL near the air compressor to
make it available at any time, and refer to it as the need arises.
● This INSTRUCTION MANUAL explains in detail
the important items that require attention;
observed as the following:
● Always observe instructions of WARNING,
CAUTION and IMPORTANT, as they indicate
considerable risks to safety.
GRAPHIC DESCRIPTIONS:
WARNING
: Indicates warnings. If handled improp-
erly, death or severe injury could
result.
CAUTION
: Indicates cautions. If handled improp-
erly, injury and/or physical damage
could result.
: Indicates air-cooled type.
Air-Cooled
Water-Cooled
: Indicates water-cooled type.
: Indicates variable speed type.
: Indicates information that needs attention,
IMPORTANT
other than WARNING and CAUTION.
: Indicates a reference page.
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Frequently Asked Questions (10)

  • What should I do if my Hitachi NEXT Series Air Compressor is not working?

    If your Hitachi NEXT Series Air Compressor is not working, first investigate the cause and take proper corrective action by referring to the LCD monitor indication and the manual. After taking corrective action, press the RESET button to clear the shutdown indication. If the problem persists or you have questions, contact your local HITACHI distributor/master dealer or representative office.


    For more information, see page 38 of the manual.
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  • How do I use the Hitachi NEXT Series Air Compressor?

    To use the Hitachi NEXT Series Air Compressor, familiarize yourself with the name, location and function of each component of the DSP air compressor, as detailed in the general description. Pay attention to the Plate of Operating/Servicing Instructions on the instrument panel and read it carefully before operation and servicing. The LCD monitor displays operation data, settings, and alarm information. You can navigate through various displays using the MONITOR button and adjust settings using the SET button and +/- UP/DOWN buttons.

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  • How do I drain condensation from the Hitachi NEXT Series Air Compressor tank?

    To drain condensation from the Hitachi NEXT Series Air Compressor, verify that air containing condensate is discharged intermittently from the intercooler and aftercooler drain ports. The amount of condensate produced is higher with increased temperature and humidity. For water-cooled units, when stopping the compressor, open the water relief pet cock and the water drain valve at the water drain port to remove cooling water from the system. Ensure complete drainage during winter to prevent freezing in the cooling water pipes.

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  • How do I start the Hitachi NEXT Series Air Compressor?

    To start the Hitachi NEXT Series Air Compressor, first ensure the discharge stop valve is fully open. Then, press the START button. The compressor will switch to full load operation within 15 seconds for fixed speed types and approximately 10 seconds for V-type models. After starting, verify that the oil pressure rises to 18 psi (0.12 MPa) or greater within ten seconds. If the pressure does not rise, press the STOP button and clean the oil strainer, or regulate the oil pressure using the oil relief valve. Also, check the LCD monitor for a gradual rise in discharge air pressure, ensuring it remains below the rated maximum pressure.

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  • What type of oil should I use for the Hitachi NEXT Series Air Compressor?

    You should use genuine Hitachi GL-68 DSP Compressor Oil.

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  • What is the oil capacity of the Hitachi NEXT Series Air Compressor?
    The oil quantity for the Hitachi NEXT Series Air Compressor is 6.6 gallons (25 liters) when not filled.
    For more information, see page 141 of the manual.
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  • How often should I perform maintenance on the Hitachi NEXT Series Air Compressor?

    Maintenance on the Hitachi NEXT Series Air Compressor should be performed according to a schedule. Daily maintenance includes filling out the OPERATION RECORD LOGBOOK, draining condensate, and observing other daily operating instructions. Bi-annual maintenance (every 3 months) involves checking LCD indications and oil level, and draining aftercooler/intercooler condensate. Bi-annual schedule (for 8,000 hours/year or less operation) includes replacing air intake filter, checking oil filter pressure, cleaning control line filter, strainers, coolers, and checking valves. Annual and 3-year schedules involve lubricating oil replacement, tightening joints/bolts/nuts, and checking electrical parts. 2-year schedule involves replacing control line filter elements, blowoff solenoid valves, and check valves. 6-year schedule involves overhauling the airend and replacing various components like main motor bearings, control line filters, and PC board assemblies.

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  • What is the maximum air pressure output of the Hitachi NEXT Series Air Compressor?

    The maximum air pressure output, or discharge pressure, for the Hitachi NEXT Series Air Compressor models DSP-45AT6N, DSP-55AT6N, DSP-75AT6N, DSP-55VATN, and DSP-75VATN is 100 psi (0.69 MPa) or 125 psi (0.86 MPa), depending on the model.

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  • How do I reset the Hitachi NEXT Series Air Compressor?

    To reset the Hitachi NEXT Series Air Compressor, press the RESET button. This button is used to reset SHUTDOWN and ALARM screens. For emergency stops, after pressing the EMERGENCY STOP button, you can restart the compressor by turning the switch knob clockwise and pressing the RESET button. If a shutdown or alarm occurs, take the proper corrective action and then press the RESET button to clear the indication.

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  • How can I reduce the noise level of the Hitachi NEXT Series Air Compressor?

    To reduce the noise level of the Hitachi NEXT Series Air Compressor, ensure enclosure panels are properly in place, as they lower the sound level of the air compressor package. When installing, avoid placing the air compressor near a wall, as this may cause the operating noise to resonate and increase noise levels. For air-cooled units, the low noise cooling fan cools the cooler and exhausts hot air, contributing to noise reduction during operation.

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Summary of Contents for Hitachi NEXT Series

  • Page 1 INSTRUCTION MANUAL HITACHI Oil-Free Rotary Screw Air Compressor Air-cooled DSP-45AT6N DSP-55AT6N DSP-75AT6N DSP-55VATN DSP-75VATN [Without dryer type] ● This INSTRUCTION MANUAL explains in detail the important items that require attention; observed as the following: Water-cooled ● Always observe instructions of WARNING,...
  • Page 2 How to Use This Instruction Manual ●   T his Instruction Manual covers the standard models of HITACHI DSP air compressor. ● This Instruction Manual is intended to assist daily operators and maintenance personnel in the installation, operation, control and service of the air compressor.

  • Page 3: Table Of Contents

    Contents 1. SAFETY PRECAUTIONS  ………………………………………………………………………………………… 2   2. GENERAL DESCRIPTION   2.1 Appearance    … ………………………………………………………………………  6 Components ………………………………………………………………………… 8   Daily Operating Components  …………………………………………………… 10   3. OPERATION PROCEDURE Instrument Panel  …………………………………………………………………… 12 Start/Stop Operation  ……………………………………………………………… 14 How to Use the Liquid Crystal Display (LCD) …………………………………… 15 How to Use the Digital Monitor ...

  • Page 4: Safety Precautions

    1. SAFETY PRECAUTIONS To ensure safe and proper operation of the air compressor, it is indispensable to carefully read and understand the following warnings and instructions detailed below. These warnings and instructions are attached to the air compressor as shown in the figure below.
  • Page 5 Do not move electronic devices such as magnetic cards, watch or measuring equipment closer to the magnetized motor rotors. For disassembly, contact the close Hitachi authorized distributors. WARNING WARNING Do Not Breathe Air! High Pressure Air! High pressure air can cause severe injury or death.
  • Page 6 1. SAFETY PRECAUTIONS DSP-45/55/75WTN Water-Cooled DSP-55/75VWTN WARNING WARNING Rotating Parts! Hot Surface! Keep hands and rods, etc. away from the rotating parts ● Do not directly touch any component ● (Cooling fans, etc.) inside the air compressor enclosure Use caution at all times, when air compressor is ●...
  • Page 7 Do not move electronic devices such as magnetic cards, watch or measuring equipment closer to the magnetized motor rotors. For disassembly, contact the close Hitachi authorized distributors. WARNING WARNING Do Not Breathe Air! High Pressure Air! High pressure air can cause severe injury or death.

  • Page 8: General Description

    2. GENERAL DESCRIPTION 2.1 Appearance This section illustrates and describes the major components of the DSP air compressor. Be familiar with the name, location and function of each component before using the DSP air compressor. DSP-45/55/75ATN Air-Cooled DSP-55/75VATN Enclosure [Front View] E n c l o s u r e p a n e l s lower the sound level Air Exhaust...
  • Page 9 2. GENERAL DESCRIPTION [Appearance] DSP-45/55/75WTN Water-Cooled DSP-55/75VWTN [Front View] Enclosure Air Exhaust Air Exhaust E n c l o s u r e p a n e l s (Air Compressor Package) lower the sound level of the air compressor This panel discharges package.

  • Page 10: Components

    2. GENERAL DESCRIPTION [Components] 2.2 Components DSP-45/55/75ATN Air-Cooled DSP-55/75VATN [Front View] Discharge pipe (Compressed air discharge) Oil cooler Aftercooler Enclosure Intercooler Instrument panel Control panel Check valve 2nd-stage Airend Common base 1st-stage Airend Oil filter Air intake filter Oil level gauge [Rear View] Air relief valve Cooling fan...
  • Page 11 2. GENERAL DESCRIPTION [Components] DSP-45/55/75WTN Water-Cooled DSP-55/75VWTN [Front View] Discharge pipe (Compressed air discharge) Cooling fan Aftercooler Enclosure Instrument panel Intercooler Control panel 2nd-stage Airend Check valve 1st-stage Airend Common Base Air intake filter Oil filter Oil level gauge [Rear View] Air relief valve Oil mist remover (OMR)

  • Page 12: Daily Operating Components

    Oil level gauge Lubricating Oil Aftercooler and Intercooler - Condensate Drain Valve ● Oil: Use genuine Hitachi GL-68 DSP Compressor ●  Verify that air containing condensate is discharged Oil. Replace the oil every 8,000h operating hour or intermittently from the intercooler and aftercooler every 2-year, whichever comes earlier.
  • Page 13 2. GENERAL DESCRIPTION [Daily Operating Components] Water-Cooled Cooling Water Control Line Filter [Fixed speed type] ① Stop the cooling water flow when the DSP has stopped running. ● Check the sight glass on the control line filter to make sure that the condensate discharged ②...

  • Page 14: Operation Procedure Instrument Panel

    3. OPERATION PROCEDURE 3.1 Instrument Panel LCD monitor MONITOR button AUTO light (yellow) RESET button ON (glowing) when an Resets SHUTDOWN Displays the operation Switches the monitor automatic operation (an and ALARM screens. data, various settings, display. AUTO operation, a 3.3.3) shutdown/alarm informa- 3.3.1)
  • Page 15 3. OPERATION PROCEDURE [Instrument Panel] RUNNING MODE Light ● POWER light (yellow): Lights up when the main power is turned on. ● REMOTE light (green): ON (glowing) when the REMOTE button is Digital Monitor EMERGENCY STOP button pressed in order to activate a remote operation. Used for basic settings as well Stops for emergency.

  • Page 16: Start/Stop Operation

    When the power is connected, the POWER light turns When the START button is pressed, the START light ON and the following Hitachi logo display appears on the turns on and the compressor starts operating. LCD. After 5 seconds, monitoring display appears; it...

  • Page 17: How To Use The Liquid Crystal Display (Lcd)

    3. OPERATION PROCEDURE [How to Use the Liquid Crystal Display (LCD)] 3.3 How to Use the Liquid Crystal Display (LCD) 3.3.1 How to Move between the Various Displays ■ Monitoring Displays ■ Menu Displays There are three monitoring displays as shown below. Follow the bottom line message on the display.
  • Page 18 3. OPERATION PROCEDURE [How to Use the Liquid Crystal Display (LCD)] 3.3.2 Monitoring Displays ■ Monitor Displays during Normal Operation Monitor Display 1 VSDA ＊ SAVE Indicates ECOMODE is activated for fixed speed type. 3.4.8) Displayed when stop is limited for AUTO operation (Standard: no symbol) Monitor Display 2 INTE : Indicates fixed speed type used the standard, 2-step...
  • Page 19 3. OPERATION PROCEDURE [How to Use the Liquid Crystal Display (LCD)] 3.3.3 Message Displays ■ Shutdown Messages ① When the shutdown occurs for the compressor, the SHUTDOWN light and shutdown contents on the LCD monitor (contents are displays on the left side and details are displayed on the right side) blink and the compressor stops running.
  • Page 20 3. OPERATION PROCEDURE [How to Use the Liquid Crystal Display (LCD)] ■ Messages of Automatic Stop Display When the air compressor stops automatically, the AUTO START light glows or blinks and RESTART display appears. After the air compressor restarts, monitoring display appears again. ●...
  • Page 21 3. OPERATION PROCEDURE [How to Use the Liquid Crystal Display (LCD)] ■ Maintenance Notice Messages  ① Periodical maintenance A maintenance date is determined by the amount of total operating hours or an elapsed calendar period, whichever comes first. When the maintenance date or time arrives, the maintenance notice message appears on the display under the heading of MESSAGE.
  • Page 22 3. OPERATION PROCEDURE [How to Use the Liquid Crystal Display (LCD)] 3.3.4 How to Move within a Menu Display and to Change a Setting  The method and procedure for altering settings is displayed using the following as an example. How to MOVE within a [FUNCTION MENU] Display ①...
  • Page 23 ⑧ Displays water failure detection conditions for water IMPORTANT cooled compressor. ⑨ Displays status of instantaneous power interruption When contacting the local Hitachi distributor, inform this (IPI) restart setting. information as a based setting status. ⑩ Displays compressor number. (Must be distinguished by number is using communication function.)
  • Page 24 3. OPERATION PROCEDURE [How to Use the Liquid Crystal Display (LCD)] Capacity control This function sets the pressures and times for capacity 8. TIME: ⑥ Can set the time to use pressure setting 2.   control. Two different combinations (P1 and P2) of When set the value properly, ②...
  • Page 25 3. OPERATION PROCEDURE [How to Use the Liquid Crystal Display (LCD)] Operation Data Display Alarm History ① Data can be recorded for a maximum of twelve (12) This display shows a maximum of 6 alarms and displays times. The 13th recorded data is automatically deleted the following information as such: type of alarm, the and the 1st recorded data is added.
  • Page 26 3.3.6. Other Settings Initial Setting 3-Language Display Switch The calendar and clock are set by Hitachi prior to The language of the display can be switched to delivery. To reset the calendar and clock, contact the Japanese, English or Chinese by the dip switch on the back of the LCD monitor board.

  • Page 27: How To Use The Digital Monitor

    3. OPERATION PROCEDURE [How to Use the Digital Monitor] 3.4 How to Use the Digital Monitor 3.4.1 How to Display Operation Status, Shutdown History, and Status of Various Settings All display contents of the digital monitor are linked with the LCD monitor. All of the following display contents can be confirmed by the LCD monitor.
  • Page 28 3. OPERATION PROCEDURE [How to Use the Digital Monitor] (2) How to Display Shutdown History Use the following procedure to display shutdown history. Press the SELECT/WIDE button 8 times. “E0.” is the ① Discharge pressure display [Latest shutdown] SELECT/WIDE displayed with the shutdown code ( 4.1) “0”...
  • Page 29 3. OPERATION PROCEDURE [How to Use the Digital Monitor] 3.4.2 How to Set Control Functions ■ Various settings (instantaneous power interruption (IPI), remote operation, dryer setting, capacity control setting, pressure setting, etc.) Switches the display from monitor mode to setting mode (F mode). RESET Displays 000th item of F mode.
  • Page 30 3. OPERATION PROCEDURE [How to Use the Digital Monitor] 7 segment Precision/ Function Item Range Default Remarks display unit Control pressure 73 〜 125 1 psi F022 setting 1 psi (MPa) (0.5 〜 0.86) (0.01 MPa) (0.86) Cut-out pressure 1 73 〜...
  • Page 31 3. OPERATION PROCEDURE [How to Use the Digital Monitor] 3.4.3 Change of Pressure Setting Use the following procedure to change the pressure setting of the capacity control system. ①  Switch the display from monitor mode to setting Pres.  mode (F mode). setting 1 ② ...
  • Page 32 (3) To change the Local or remote operation by Alter  values. external contact.     ( Contact the local HITACHI distributor/master dealer or representative office.) ① Connect the external contact wiring. ( 7.4) ② Switch the display from monitor mode to setting mode (F mode).
  • Page 33 2 is activated. Time External selection of Cut-in/Cut-out pressure combination 1 or 2 is an option. (F018-2). Contact the local HITACHI distributor/master dealer or representative office. 3.4.8 ECOMODE Function (only for Fixed speed type) (1) Setting of ECOMODE (Energy Saving Mode) ECOMODE is set OFF on factory setting.

  • Page 34: Daily Operation Of Air Compressor

    ●  If the air relief valve has blown or a protective device has shutdown the air compressor, investigate the cause of and take corrective action. If there are any questions or comments in taking these actions, contact the local HITACHI distributor/master dealer or representative office. 3.5.1 Preparing the air compressor ①...
  • Page 35 3. OPERATION PROCEDURE [Daily Operation of Air Compressor] 3.5.3 While Operating the Air Compressor ① Check the LCD monitor for operating pressures and temperatures, and verify that: RUNNING CONTROL RUNNING MODE AUTO - Interstage pressure (INTSTG P), oil pressure (OIL PRES), REMOTE MONITOR POWER ALARM...

  • Page 36: Daily Operation Of Oil Mist Remover

    3. OPERATION PROCEDURE [Daily Operation of Oil Mist Remover, Adjustment Procedure] 3.6 Daily Operation of Oil Mist Remover 3.6.1 When Setting 3.6.2 When Stopped Make sure that the vacuum indicator shows a red mark. Pressure gauge (psi) 22 to 26 Make sure that the pressure gauge reads as above.
  • Page 37 3. OPERATION PROCEDURE [Adjustment Procedure] 3.7.2 Regulating the Oil Pressure ① Use the oil relief valve to regulate the oil pressure. The illustration below is an example of water cooler. To regulate the oil pressure, open the oil relief valve cap, loosen the lock nut, and turn the regulating bolt to keep the oil pressure at the specified 18 psi to 23 psi (0.12 to 0.16 MPa).

  • Page 38: Troubleshooting Protective Device

    LCD monitor indication and this manual, and then press the RESET button to clear the shutdown indication. Depending on the type of shutdown, contact the local HITACHI distributor/ master dealer or representative office.
  • Page 39 Port 1 (65) =Main circuit communication (Vtype), Port 2 (66)=Fan inverter communication (Air-cooled type) Port 3 (67)= LCD communication, Port 4 (68)= Multiple unit control communication, Port 5 (63)= External communication (5) If the thermistor is disconnected, override operation is not available. Contact the local HITACHI distributor/master dealer or representative office.
  • Page 40 4. TROUBLESHOOTING [Protective Device] ■ How to Identify the Failure Cause of E0.13 (DCBL controller Error) and E0.57 (Fan Inverter Error) and Check the History Note : DCBL controller is equipped with Vtype. Fan inverter is equipped with air-cooled type. ①...
  • Page 41 4. TROUBLESHOOTING [Protective Device] ■ Details of instantaneous power interruption (IPI) detection This air compressor detects three types of power failure, brief IPI: less than one seconds, IPI: 1 to 5 seconds and power interruption: more than 5 seconds. Vtype detects the IPI by both PC board and DCBL controller. Therefore this is possible to detect the power failure 2 times at once.

  • Page 42: Troubleshooting Of Air Compressor

    4. TROUBLESHOOTING [Troubleshooting of Air Compressor] 4.2 Troubleshooting of Air Compressor ■ Most common problems, causes and corrective actions are described below. Phenomenon LCD indication example Cause Corrective remedies NOT start 1. Power supply switch - OFF. 1. Check the power supply switch. ＜...

  • Page 43: Troubleshooting Of Oil Mist Remover

    4. TROUBLESHOOTING [Troubleshooting of Oil Mist Remover] 4.3 Troubleshooting of Oil Mist Remover Problems and actions to be taken are as follows. ① The vacuum indicator shows a red mark The pressure gauges reads zero (0) psi. The control air is not supplied. Reset the regulator to a proper pressure.

  • Page 44: Installing And Piping The Dsp

    5. INSTALLING AND PIPING THE DSP 5.1 Unpacking the Air Compressor ■ After unpacking the crate, verify that the product is in accordance with the order, by referring to section 15. ■ Verify that the product is not damaged or deformed during transportation. Model Nameplate Standard Accessories Air-cooled...

  • Page 45: Installing The Dsp Air Compressor

    5. INSTALLING AND PIPING THE DSP [Installing the DSP Air Compressor] 5.3 Installing the DSP Air Compressor (Selection of a proper installation location is essential to a long service life for the Air Compressor.) WARNING 1. Keep flammable solvents or any other hazardous chemicals away from the air compressor. Such chemicals may be ingested into the air compressor and could cause an explosion during the compression process.

  • Page 46: Piping The Dsp Air Compressor

    If you use a solenoid valve as the automatic stop valve, consult your Hitachi ⑥ If the compressed air piping near the air compressor is distributor or local Service Station given on the rear to be elevated, keep a space of 20 inches (500 mm) cover.
  • Page 47 5. INSTALLING AND PIPING THE DSP [Piping the DSP Air Compressor] 5.4.3 How to Install Automatic 5.4.5 Air Receiver Tank Discharge Valve Pressure detecting piping Discharge Stop valve Pressure detecting piping Discharge Stop valve Motorized isolation valve Air receiver tank Motorized isolation Air receiver tank...
  • Page 48 5. INSTALLING AND PIPING THE DSP [Piping the DSP Air Compressor] 5.4.6 Drain Pipe 5.4.7 Cooling Water Piping Water-Cooled drain pit Water outlet Water inlet Cooling drain discharge valve Drain pipe ① The pipings for water inlet and outlet for coolers are required.

  • Page 49: Ventilation Of Air Compressor Room

    5. INSTALLING AND PIPING THE DSP [Ventilation of Air Compressor Room] 5.5 Ventilation of Air Compressor Room CAUTION Provide a ventilating system to the air compressor room in the event that the room temperature exceeds the allowable ambient operating temperature of 104℉  (40℃). Operating the air compressor at an ambient operating temperature above 104℉ (40℃) may cause a serious problem.
  • Page 50 5. INSTALLING AND PIPING THE DSP [Ventilation of Air Compressor Room] 5.5.2 Water-Cooled Type Water-Cooled ① For the small air compressor room installation, install CAUTION a ventilating fan and an air intake opening. The position of the ventilating fan is as high as possible When installing exhaust ducts, install a single and the position of the air intake opening is as low as duct for each compressor.

  • Page 51: Startup Operation

    4.1 and take proper action. WARNING IMPORTANT Hitachi does NOT fill the air compressor with oil. If the compressor (Air-cooled type) restart just after Before startup operation, fill the air compressor stopped, the air compressor shutdowns by fan motor overload with indication of OVERLOAD SUB in LCD with the oil.
  • Page 52 6. STARTUP OPERATION [Startup Operation of the Air Compressor] 6.1.2 Starting ② Verify that the air compressor has proper rotation. If rotation is not correct (phase reversal), change 2 of 運転管理 運転状況 RUNNING CONTROL RUNNING MODE ③④ the 3 wires of the power cable. 遠 方...
  • Page 53 6. STARTUP OPERATION [Startup Operation of the Air Compressor] Proper Pressure/Temperature Indications on LCD DSP-45/55/75ATN DSP-55/75VATN LCD Indication Unit DSP-45/55/75WTN DSP-55/75VWTN Operating State Working Pressure Loading Unloading Loading Unloading 100 psi (0.69 MPa) 100 (0.69) or less 85 - 100 (0.59 - 0.69) 103 (0.71) or less Discharge pressure psi (MPa)

  • Page 54: Initial Setting Of Omr Regulator

    6. STARTUP OPERATION [Initial Setting of OMR Regulator] 6.2 Initial Setting of OMR Regulator ① Set a control air pressure to a maximum level. ④ Make sure that the vacuum indicator does not show a Example: If a control air pressure varies between red mark.

  • Page 55: Wiring 7.1 Power Supply Equipment

    7. WIRING WARNING 1. Always use a licensed electrician. Do not allow an unlicensed person to wire the compressor. An unlicensed person may wire the air compressor wrongly, and a wrong wiring may cause an electric shock. 2. Do not remove any protective relays on the air compressor. Also, do not make a modification of the control circuit that may result in impairing the protective relay's function.

  • Page 56: Connecting The Power Cable

    Hitachi. wiring. Refer to “Wiring Diagram” on 7.4. The type and sizing not supplied by Hitachi is the responsiblitiy of the customer. ② Ground resistance requirements are required when NOTE: Use the earth leakage circuit breaker that is connected the power cable and grounding cable.
  • Page 57 (5) If radios, TV sets, or any other electronics devices are located around the air compressor, install the HITACHI noise filters as specified in the right table on the primary side of the air compressor.

  • Page 58: Wiring Diagram

    7. WIRING [Wiring Diagram] 7.4 Wiring Diagram 1. Wiring Diagram 1 (DSP-45/55ATN, 460V)  ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ p. 58 2. Wiring Diagram 1 (DSP-75ATN, 460V) ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ p. 59 3. Wiring Diagram 1 (DSP-55VATN, 460V)  ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ p. 60 4. Wiring Diagram 1 (DSP-75VATN, 460V)  ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ p. 61 5.

  • Page 59: Control Panel/Lcd Monitor Specifications

    7. WIRING [Control panel/LCD Monitor Specifications] 7.5 Control panel/LCD Monitor Specifications Power of 460 V (60 Hz) control circuit Motor Fixed-speed compressor… - △ (three contactor) Vtype…Soft start starting method Operating (1) Unload Stop (2) Restart for IPI (3) Remote Start/Stop functions (4) Dryer prestart (5) Lead/lag (option)
  • Page 60 7. WIRING [Wiring Diagram] Air-Cooled 1. Wiring Diagram 1 (DSP-45/55ATN, 460V)
  • Page 61 7. WIRING [Wiring Diagram] Air-Cooled 2. Wiring Diagram 1 (DSP-75ATN, 460V)
  • Page 62 7. WIRING [Wiring Diagram] Air-Cooled 3. Wiring Diagram 1 (DSP-55VATN, 460V)
  • Page 63 7. WIRING [Wiring Diagram] Air-Cooled 4. Wiring Diagram 1 (DSP-75VATN, 460V)
  • Page 64 7. WIRING [Wiring Diagram] Water-Cooled 5. Wiring Diagram 1 (DSP-45/55WTN, 460V)
  • Page 65 7. WIRING [Wiring Diagram] Water-Cooled 6. Wiring Diagram 1 (DSP-75WTN, 460V)
  • Page 66 7. WIRING [Wiring Diagram] Water-Cooled 7. Wiring Diagram 1 (DSP-55VWTN, 460V)
  • Page 67 7. WIRING [Wiring Diagram] Water-Cooled 8. Wiring Diagram 1 (DSP-75VWTN, 460V)
  • Page 68 7. WIRING [Wiring Diagram] 9. Wiring Diagram 2 (DSP-45/55/75AWTN, 55/75VAWTN, 460V)

  • Page 69: Standard Components

    8. STANDARD COMPONENTS AND SUBSYSTEMS 8.1 Standard Components ⑴ Airend ⑷ Intercooler A rotor assembly rotates while the timing gear keeps Air-Cooled a precise clearance between the male and female The air-cooled intercooler is made of aluminum. The rotors. This non-contacting, high speed rotation of intake air is compressed up to 29 psi (0.20MPa) (and the rotor assemblies compresses the intake air.

  • Page 70: Air/Oil/Water Flow

    8. STANDARD COMPONENTS AND SUBSYSTEMS [Standard Components, Air/Oil/Water Flow] 8.2 Air/Oil/ Water Flow ⑻ Air intake filter Compressed Air Flow The air intake filter is a dry type for easy cleaning or Intake air is compressed and heated by the 1st stage replacement.
  • Page 71 8. STANDARD COMPONENTS AND SUBSYSTEMS [Air/Oil/Water Flow] Flow diagram (Fixed speed type) Air-Cooled Compressed Air Flow and Oil Flow Air exhaust Air exhaust Air exhaust Compressed air discharge MOHR Intercooler condensate Air intake for drain main motor Control air for OMR 63SV Air intake for compressed air...
  • Page 72 8. STANDARD COMPONENTS AND SUBSYSTEMS [Air/Oil/Water Flow] Flow diagram Air-Cooled Compressed Air Flow and Oil Flow Air exhaust Air exhaust Air exhaust Compressed air discharge Intercooler condensate Air intake for drain main motor Control air for OMR 63SV Air intake for compressed air Oil drain Oil drain...
  • Page 73 8. STANDARD COMPONENTS AND SUBSYSTEMS [Air/Oil/Water Flow] Flow diagram (Fixed-speed compressor) Water-Cooled Compressed Air Flow and Oil Flow Air exhaust Air exhaust Compressed air discharge MOHR Intercooler condensate Air intake for drain main motor Control air for OMR 63SV Air intake for compressed air Oil drain Oil drain...
  • Page 74 8. STANDARD COMPONENTS AND SUBSYSTEMS [Air/Oil/Water Flow] Flow diagram Water-Cooled Compressed Air Flow and Oil Flow Air exhaust Air exhaust Air exhaust Compressed air discharge Intercooler condensate Air intake for drain main motor Control air for OMR 63SV Air intake for compressed air Oil drain Oil drain...
  • Page 75 8. STANDARD COMPONENTS AND SUBSYSTEMS [Air/Oil/Water Flow] Flow diagram Water-Cooled Cooling Water Flow Intercooler Aftercooler 2nd-stage airend Oil cooler 1st-stage airend Motorized water isolation valve Water relief pet cock (WIVM) Cooling water Cooling water outlet inlet Cooling water outlet Compressed air flow Cooling water flow...

  • Page 76: Cooling Water

    8. STANDARD COMPONENTS AND SUBSYSTEMS [Cooling Water] 8.3 Cooling Water a) The cooling water pipe could freeze and burst in Water-Cooled cold temperatures. 1. Cooling Water Quality b) The airend case can be overcooled and develop If a cooling tower (open-type circulatory cooling water moisture internally;...

  • Page 77: Capacity Control System

    8. STANDARD COMPONENTS AND SUBSYSTEMS [Capacity Control System] 8.4 Capacity Control System 8.4.1 Standard Load-Unload Operation The unloading process occurs when the compressed air the airend while the blowoff valve opens and exhausts demand decreases and the discharge pressure rises as the internal compressed air to atmosphere.
  • Page 78 8. STANDARD COMPONENTS AND SUBSYSTEMS [Capacity Control System] 8.4.2 AUTO Operation (Only for Fixed Speed Type) AUTO operation is the Auto start - stop function in When the load ratio is less than 30%, CPU stop the main addition to a standard on-off line, 0% or 100% capacity motor.
  • Page 79 8. STANDARD COMPONENTS AND SUBSYSTEMS [Capacity Control System] 8.4.3 Typical Change of Pressure ⑴ Standard Offline-or-Online, 0%-or-100%-Capacity, 2-Step Control Starting and Loading Unloading Loading Pressure Raising Air Receiver Pressure Air discharge pressure after aftercooler Time ⑵ Optional AUTO Operation ⑴ Stop Delay Time-Requires 15 seconds （1）...
  • Page 80 8. STANDARD COMPONENTS AND SUBSYSTEMS [Capacity Control System] 8.4.4 Capacity Control System Purging Air Flow and Action of Blowoff Solenoid Valve Air intake Blowoff solenoid Blowoff solenoid Operation phase valve (1) valve (2) Air Intake filter 1st-stage blowoff solenoid valve (2) Starting Fully opened Fully closed...
  • Page 81 8. STANDARD COMPONENTS AND SUBSYSTEMS [Capacity Control System] ① CPCS Motor Speed Control Based on the pressure signals detected by the pressure sensor, the built in circuit board’s CPU performs PID IMPORTANT operations or calculates the motor speed that meets the compressed air consumption rate, and then inputs the PID stands for Proportional, Integral, and Differential.
  • Page 82 8. STANDARD COMPONENTS AND SUBSYSTEMS [Capacity Control System] 8.4.6 PQ Wide Mode – Capacity Control Flow Settings NOTE: PQ Wide Mode is set to OFF at the time of shipment from the factory. If PQ Wide Mode is required, it needs to be set to ON on the instrument panel.

  • Page 83: Oil Mist Remover System

    8. STANDARD COMPONENTS AND SUBSYSTEMS [Oil Mist Remover System] 8.5 Oil Mist Remover System Ejector OMR Relief Valve Remover Element Uses compressed air Opens when pressure in A high-performance to generate a vacuum element to separate the gear case excessive- pressure, which main- fine oil mists.

  • Page 84: Maintenance

    If the data deviates from the benchmark in the logbook, service the air compressor or call the local HITACHI distributor/master dealer or representative office for service. Drain the condensate on a daily basis and observe other daily operating instructions.

  • Page 85: Standard Maintenance Schedule

    9. MAINTENANCE [Standard Maintenance Schedule] 9.2 Standard Maintenance Schedule Maintenance Schedule A (for 8,000 hours/year or less operation) Follow this schedule (A) if the MAINT.SCHEDULE : A appears on the LCD monitor. ○●… Replace △○… Complete service in house △▲… Clean or check ▲●…...
  • Page 86 9. MAINTENANCE [Standard Maintenance Schedule] Category Part or Item Action Type Remarks 1-year 3-year Orifice- Aftercooler condensate Check / Clean Fixed / V Clean as required. ▲ Orifice and check valve- Intercooler condensate Check / Clean Fixed / V Clean as required. ▲...
  • Page 87 9. MAINTENANCE [Standard Maintenance Schedule] Maintenance Schedule B (for 4,000 hours/year or less operation) Follow this schedule (B) if the MAINT.SCHEDULE : B appears on the LCD monitor. ○●… Replace △○… Complete service in house △▲… Clean or check ▲●… Ask your distributor to service Daily Schedule (for 4,000 hours/year or less operation) Part or Item...
  • Page 88 9. MAINTENANCE [Standard Maintenance Schedule] Part or Item Action Category Type Remarks Hi-Precooler Check / Clean Fixed / V Clean as required. (Air-cooled 125psi (0.86)MPa type) ▲ Demister - Drain separator Check / Clean Fixed / V ▲ 3-Way solenoid valve & capacity control system Check Fixed Replace as required.

  • Page 89: Maintenance Schedule For Oil Mist Remover

    9. MAINTENANCE [Maintenance Schedule for Oil Mist Remover] 9.3 Maintenance Schedule for Oil Mist Remover ① To ensure long and successful operation of the Oil ③ These maintenance intervals are not considered Mist Remover, follow the standard maintenance warranty. schedule attached below. ④...

  • Page 90: How To Service The Air Compressor

    9. MAINTENANCE [How to Service the Air Compressor] 9.4 How to Service the Air Compressor Before servicing the air compressor, stop it, disconnect the power (turn off the earth leakage (ground) circuit breaker) and verify that the compressor’s internal pressure has dropped to atmospheric pressure. The maintenance intervals shown refer to the standard Maintenance Schedule (A).
  • Page 91 9. MAINTENANCE [How to Service the Air Compressor] Depressurizing the System Before cleaning the drain pipe, intercooler, aftercooler, control line filter, or replacing the check valve, reduce Aftercooler side the internal pressure to 0 (zero) by opening the Ball valve (2) Three-way change valve condensate drain.
  • Page 92 9. MAINTENANCE [How to Service the Air Compressor] Condensate drain port (Intercooler/Aftercooler) (Daily check) Clean the strainer elements (Bi-Annually) & Orifices (Annually) ■ Check the condensate drain Moisture in the intake air, especially in hot and humid environments, is condensed inside the air compressor during compression.
  • Page 93 ◆ Disassembly of strainer element during operation operation   I f the strainer needs to be cleaned while the air Aftercooler side compressor is running, contact the local HITACHI distributor/master dealer or representative office. Ball valve (2) Three-way change valve While the air compressor is running, strainer is Ⓔ...
  • Page 94 9. MAINTENANCE [How to Service the Air Compressor] Lubricating oil Replacement (Annually) ■ Oil drain ①   S top the air compressor and disconnect the power. Remove the front door (1) and left door. ② Place oil pans under the oil drain ports ①②③. The dimension of oil pan is approximately 3 ×...
  • Page 95 9. MAINTENANCE [How to Service the Air Compressor] Cleaning of Oil Strainer (Primary Side) (Bi-Annually) ① Drain the lubricating oil in the procedure described in  . ② Remove the front door (1) [Ref. No. 904] and left door [Ref. No. 991]. ③...
  • Page 96 9. MAINTENANCE [How to Service the Air Compressor] Operation Check of Air Relief Valve (Bi-Annually) ① Maintain the rated maximum discharge pressure (ex. 100 psi (0.69 MPa). [Rear view] Air relief valve ring ②   P ull the ring connected to air relief valve. ③...
  • Page 97 ③ Generally, there are 3 kinds of dust and dirt particles.       ・ Light dust particles       ・ Heavy dust particles       ・ Greasy dust particles Contact the local HITACHI distributor/master dealer or representative office for the detail. Rear panel (3) Rear panel (2) Rear panel (1)
  • Page 98 Wire brush remove the scale from the inner surfaces of the oil cooler tube nest. Oil cooler ● Intercooler/Aftercooler If scale build up occurs often, contact the local HITACHI distributor/master dealer or representative office for scale removal.
  • Page 99 9. MAINTENANCE [How to Service the Air Compressor] Replacement of Check Valve (2-Yearly) Depressurizing the System Air-Cooled Depressurize the compressed air in the air compressor Gasket (1) as described in 9.4  . Gasket (2) Removing the Enclosure Panels Check valve cover (upper) Remove the enclosure panels, such as front door (1) [Ref.
  • Page 100 Replacement Battery replacement display on LCD monitor criteria Approx. 1 year with power off Life Approx. 6 years under ordinary service conditions ● The batteries is an exclusive part. Contact the local HITACHI distributor/master dealer or representative office.
  • Page 101 ◎ ◎ ◎ ○ Burnt motor coil NOTE 2 ◎ ◎ ◎ ○ Contact the local Hitachi distributor. ○ ○ ○ NOTES) 1. ◎ : Close relationship between the cause and type of problem. 〇 : Relationship between the cause and type of problem.
  • Page 102 Vtype utilize the main motor which has permanent magnetic rotor. DANGER Contact the local HITACHI distributor/master dealer or representative office for the repair or disassembly. Repair and disassembly work must be performed by licensed technician to avoid the electric shock, injury and/or fire.
  • Page 103 (Raremax Super by Kyodo Yushi) . ③ Close the front door. IMPORTANT ● Contact the local HITACHI distributor/master dealer or representative office for the grease detail. The bearing on the opposite side is shield type; filling of ● Greasing must be done while the main motor grease is not necessary on the opposite side.
  • Page 104 ④   D uring periodical maintenance, re-tighten the terminals, check the conductor and insulator for corrosion, and inspect/replace the cooling fan and Charge lamp smoothing capacitor. (Fan inverter) (Check that it is off.) Contact the local HITACHI distributor/master dealer or representative office for the detail.
  • Page 105 ④   D uring periodical maintenance, re-tighten the terminals, check the conductor and insulator for corrosion, and inspect/replace the cooling fan and smoothing capacitor. Contact the local HITACHI distributor/master dealer or representative office for the detail. Air-Cooled Charge lamp (fan inverter)
  • Page 106 9. MAINTENANCE [How to Service the Air Compressor] [Fixed-Speed type] Air-Cooled Cleaning of Fan Inverter Cooling Fin If dust adheres to the fan inverter cooling fin, cooling performance of the fan inverter is decreased. Also, it Fan inverter may cause shorten the life of smoothing capacitor and Cooling fan connector power devices, and may cause components failures.
  • Page 107 9. MAINTENANCE [How to Service the Air Compressor] Cleaning of Controller and Fan Inverter Cooling Fin (The fan inverters are provided only with Air-Cooled If dust adheres to the cooling fin of the controller and fan inverter, cooling performance is decreased. Also, it may cause shorten the life of smoothing capacitor and power devices, and may cause components failures.
  • Page 108 Condenser life (years) And immediately replace it if leakage or expansion is detected. [Condenser life curve: reference value] Contact the local HITACHI distributor/master dealer or representative office for the replacement.
  • Page 109 9. MAINTENANCE [How to Service the Air Compressor] Oil Mist Remover 1. Replacement of remover element 3. Maintenance of OMR Relief Valve (See Fig. A.) ① Remove the pipe provided at the top of the remover if ①   T urn the nut at the top of the OMR relief valve and required.

  • Page 110: Cautions For A Long Term Operation Suspension

    ● If the air compressor can’t be operated weekly, rust prevented action and periodical inspection is required. Contact the local HITACHI distributor/master dealer or representative office for the detail. ■ How to perform the unload stop action with...

  • Page 111: Parts List

    11. PARTS LIST Air End Assembly Ref. Description 100 1st-Stage Air End (new) 132 1st-Stage Air End Discharge Cover 133 1st-Stage Air End Jacket Cover 134 Gasket, 1st-stage air end discharge cover 135 Gasket, 1st-stage air end jacket cover 138 Knock pin, 1st-stage air end 143 Pinion Gear, 1st-stage air end 200 2nd-stage Air End (new) 232 2nd-Stage Air End Discharge Cover...
  • Page 112 11. PARTS LIST Motor Assembly [Fixed-speed compressor] Ref. Description 410 (※2) 436 (※2) 302 Bull Gear 306 Pinion Gear, oil pump 309 Bushing 438 (※2) 313 Cover, shaft seal 337 O-Ring (motor flange) 340 Key 365 O-Ring (※2) 367 Cover,Gear 387 Collar 455 (※1) 391 Shaft Seal...
  • Page 113 11. PARTS LIST Suction [Fixed-speed compressor] Ref. Description 500 Suction Throttle Valve Assembly 501 Air Cylinder Assembly 540 （ ※1） 502 Body, STV 510 （ ※1） 503 Tube, air cylinder 504 Cover (1) 505 Cover (2) 506 Piston, blowoff valve 507 Valve Sheet, blowoff valve piston 508 Plate 509 Spindle, air cylinder...
  • Page 114 11. PARTS LIST Coolers & Ventilating Fan (1) Ref. Description Air-Cooled 581 Partition (1) 582 Partition (2) 583 Partition (3) 584 Plate Washer 585 Maintenance Cover (3) 586 Maintenance Cover (4) 608 Aftercooler 623 Intercooler 628 Duct Panel (1) 639 Oil cooler 642 Duct Panel (2) 643 Duct Panel (3) 644 Duct Panel (4)
  • Page 115 11. PARTS LIST Coolers & Ventilating Fan (1) Ref. Description Water-Cooled 601 Shell, aftercooler 602 Tube Nest, aftercooler 605 Gasket, aftercooler tube nest 608 Aftercooler Assembly 610 Oil cooler Assembly 611 Tube Nest, oil cooler 612 Cover, oil cooler water chamber 613 Gasket, oil cooler water chamber cover 614 Cover, oil cooler 615 Gasket, oil cooler cover...
  • Page 116 11. PARTS LIST Oil Pump Ref. Description 300 Consumable Parts Kit, oil pump 327 Oil Pump Assembly 328 Bearing 329 Oil Seal 342 Oil Pump body 343 Housing, oil pump bearing 345 Key 356 Key 362 Snap Ring 363 O-Ring 378 Bush Bearing Instrument Panel Ref.
  • Page 117 11. PARTS LIST Control Panel [Fixed-speed compressor] 707 G14 45/55/75 kW (Water cooled only) ※D12 Water cooled cooled G05 (Water cooled only) Ref. Description 700 Control Panel 701 Electromagnetic Contactor (42) 702 Electromagnetic Contactor (6) 704 Electromagnetic Contactor, Fan Motor E48 (Air cooled only) 705 Fuse (1A) 706 Fuse (1.25A)
  • Page 118 11. PARTS LIST Control Panel 55 kW E48 G04 G13 E09 G16 (Air cooled only) Air-coold Water-coold G07 E46 704 G18 (Water-coold only) E48 (Air cooled only) G05 G04 (Water cooled only) Ref. Description E04 Controller Fan (1), DCBL Controller E06 Power Printed Circuit Board E07 Smoothing Condenser E09 Line Noise Filter...
  • Page 119 11. PARTS LIST Control Panel Air-Cooled    75 kW Ref. Description 700 Control Panel 705 Fuse (1A) 706 Fuse (1.25A) 707 Fuse (1.6A) 708 Current Transformer 745 PC Board 753 DC Reactor (1) B44 Door, Control Box D06 Terminal Block (2) D10 Surge Absober D12 Cooling Fan D73 Reversed Phase Relay...
  • Page 120 11. PARTS LIST Control Panel Water-Cooled    75 kW Ref. Description 700 Control Panel 704 Electromagnetic Contactor, Fan Motor 706 Fuse (1.25A) 707 Fuse (1.6A) 708 Current Transformer 730 Condenser 745 PC Board 753 DC Reactor (1) B44 Door, Control Box D06 Terminal Block (2) D10 Surge Absober D12 Cooling Fan...
  • Page 121 11. PARTS LIST Air Pipe Ref. Description Air-Cooled 004 O-Ring, condensate water separator seat 006 Cover, Condensate Separator 021 Demister 022 Air Piping (1) 023 Air Piping (2) 024 Air Piping (3) 125 psi (0.86 MPa) type 025 Air Piping (4) 026 Air Piping (5) 027 Air Piping (6) 028 Air Piping (7)
  • Page 122 11. PARTS LIST Air Pipe Ref. Description Water-Cooled 001 Aftercooler Header (2) 002 O-Ring, aftercooler 003 Gasket (3) 004 O-Ring, Condensate Separator 006 Cover, Condensate Separator 010 Gasket, cooler Header 021 Demister 022 Air Piping (1) 023 Air Piping (2) 024 Intercooler Header (2) 025 Air Piping (3) 026 Air Piping (4)
  • Page 123 11. PARTS LIST Drain Pipe Ref. Description 006 Strainer Assy 007 Gasket, strainer 043 Check Valve 047 Strainer Element 052 Orifice, condensate piping (AC) 876 2 way Valve (1) B35 Support (3), condensate piping B36 Support (4), condensate piping F48 Vibration Isolation Rubber F67 3 way Switching Valve Air-Cooled Water-Cooled...
  • Page 124 11. PARTS LIST Oil Piping (2) Ref. Description Air-Cooled 369 O-Ring, strainer cover 396 Strainer Cover 770 Oil Piping (OP suction) 771 Oil Piping (OP discharge) 772 Oil Piping (1) 773 Oil Drain Piping (1) 774 Oil Drain Piping (2) 775 Oil Piping (2) 776 Oil Piping (3) 828 Orifice...
  • Page 125 11. PARTS LIST Oil Piping (2) Ref. Description Water-Cooled 369 O-Ring, strainer cover 396 Strainer Cover 770 Oil Piping (OP suction) 771 Oil Piping (OP discharge) 773 Oil Drain Piping (1) 774 Oil Drain Piping (2) 828 Orifice 880 Oil Strainer 882 Oil Filter Element 888 Oil Temperature Sensor 996 Filter Wrench A...
  • Page 126 11. PARTS LIST Blowoff Piping Ref. Description Air-Cooled 900 Blowoff Silencer [Fixed speed type] 901 Seat, blowoff silencer 902 Cover, blowoff silencer B38 Plate, blowoff piping E33 Support, blowoff piping (1) E34 Support, blowoff piping (2) E94 Blowoff Air Piping Ref.
  • Page 127 11. PARTS LIST Blowoff Piping Ref. Description Water-Cooled Blowoff Silencer Seat, blowoff silencer [Fixed speed type] Cover, blowoff silencer Tee Fitting Blowoff Cooler Blowoff Air Piping (1) Blowoff Air Piping (2) Ref. Description Blowoff Silencer Seat, blowoff silencer Cover, blowoff silencer Tee Fitting Blowoff Solenoid Valve (1) Blowoff Solenoid Valve (2)
  • Page 128 11. PARTS LIST Control Air Pipe Ref. Description [Fixed speed type] Air-Cooled 019 Check Valve 085 O-ring, control line filter 799 Element, control line filter 849 Support, pressure sensor 892 Support plate, solenoid valve 896 3-Way Solenoid Valve 897 Control Line Filter 898 Pressure Differential Indicator 899 Solenoid Valve Manifold A92 Seat, sensor...
  • Page 129 11. PARTS LIST Control Air Pipe Ref. Description Air-Cooled   849 Support, pressure sensor 898 Pressure Differential Indicator A92 Seat, sensor D26 Pressure Sensor (discharge air) D79 Filter Nipple D99 Pressure Sensor (interstage) E40 Seat (1), pressure detecting pipe H63 Seat (2), pressure detecting pipe H83 Pressure Sensor (oil)
  • Page 130 11. PARTS LIST Control Air Pipe Ref. Description [Fixed speed type] Water-Cooled 019 Check Valve 085 O-ring, control line filter 799 Element, control line filter 849 Support, pressure sensor 892 Support plate, solenoid valve 896 3-Way Solenoid Valve 897 Control Line Filter 898 Pressure Differential Indicator 899 Solenoid Valve Manifold A92 Seat, sensor...
  • Page 131 11. PARTS LIST Control Air Pipe Ref. Description   Water-Cooled 849 Support, pressure sensor 898 Pressure Differential Indicator A92 Seat, sensor D26 Pressure Sensor (discharge air) D79 Filter Nipple D99 Pressure Sensor (interstage) E40 Seat (1), pressure detecting pipe H63 Seat (2), pressure detecting pipe H83 Pressure Sensor (oil)
  • Page 132 11. PARTS LIST Enclosure (1) Air-Cooled 925 H71 Ref. Description 904 Front Door (1) 905 Front Door (2) 906 Front Panel 908 Right Panel 910 Left Panel 911 Rear Panel (1) 912 Rear Panel (2) 913 Rear Panel (3) 914 Top Panel (1) 915 Top Panel (2) 925 cover(1), piping 926 cover(2), piping...
  • Page 133 11. PARTS LIST Enclosure (2) Ref. Description Air-Cooled 917 Duct, air intake 921 Cover, air intake filter duct 922 Air Intake Filter 932 Wing Nut 933 Stud Bolt 937 Bolt with assistant 975 Duct, motor 982 Support, Frame (3) H88 Protective Cover H95 Support, Frame (1) H96 Support, Frame (2)
  • Page 134 11. PARTS LIST Enclosure (1) 925 926 H71 Water-Cooled Ref. Description 904 Front Door (1) 905 Front Door (2) 906 Front Panel 908 Right Panel 910 Left Panel 911 Rear Panel (1) 912 Rear Panel (2) 913 Rear Panel (3) 914 Top Panel (1) 915 Top Panel (2) 925 cover(1), piping...
  • Page 135 11. PARTS LIST Enclosure (2) Ref. Description Water-Cooled 917 Duct, air intake 921 Cover, air intake filter duct 922 Air Intake Filter 932 Wing Nut 933 Stud Bolt 937 Bolt with assistant 975 Cover (1), motor duct 976 Duct, motor (1) 977 Duct, motor (2) 978 Cover (2), motor duct E59 Duct (1), Starter Box...
  • Page 136 11. PARTS LIST Oil Mist Remover Ref. Description D37 Element D38 O-Ring D39 Solenoid Valve D40 Pressure Gauge D41 Ejector D42 Vacuum Indicator D43 Valve Sheet D44 Valve Spring D45 Air Filter/Air Pressure Regulator D46 Diaphragm, air pressure regulator D48 Element, air filter D49 Float Trap D78 Packing E62 O-Ring, air pressure regulator...

  • Page 137: Warranty And After-Sales Service

    12. WARRANTY AND AFTER-SALES SERVICE 12.1 Limited Warranty For information regarding warranty, refer to the HITACHI DSP-Series Warranty Policy. 12.2 After-Sales and Service If you have a problem when using the product, read the section 4. “TROUBLESHOOTING,” carefully and examine the problem by yourself.

  • Page 138: Relocation And Disposal

    13.1 Relocation To relocate the product, please contact the local HITACHI distributor/master dealer or representative office. Note in particular that you need to replace the parts to relocate the compressor from a 50 Hz area to a 60 Hz area, or vice versa.

  • Page 139: Operation Record Logbook

    14. OPERATION RECORD LOGBOOK...
  • Page 140 14. OPERATION RECORD LOGBOOK...

  • Page 141: Standard Specifications

    (4) Pressures are indicated as the gauge pressure. (5) Install the air compressor indoors and avoid flammable and corrosive environment, moisture and dust. (6) Hitachi may make improvements and/or changes in the appearance and/or specifications described in this publication at anytime without notice.
  • Page 142 (4) Pressures are indicated as the gauge pressure. (5) Install the air compressor indoors and avoid flammable and corrosive environment, moisture and dust. (6) Hitachi may make improvements and/or changes in the appearance and/or specifications described in this publication at anytime without notice.
  • Page 143 15. STANDARD SPECIFICATIONS Air-Cooled Water-Cooled ■ Controller Specifications DSP-55VATN DSP-75VATN Model DSP-55VWTN DSP-75VWTN Specs Main Motor Main Motor Power HP (kW) 75 (55) 100 (75) Controller Capacity 400 V Rated Output Current Class Rated Input Current Air-Cooled ■ Fan Inverter Specification DSP-45ATN DSP-75ATN Model...
  • Page 144 Hitachi Industrial Equipment Systems Co.,Ltd. DSA-590 2014.1 Printed in Japan...

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