Hitachi NEXT Series Service Manual
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Hitachi NEXT Series Service Manual

Oil-free screw compressor
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Confidential
HITACHI
OIL-FREE SCREW COMPRESSOR
NEXT series
Mechanical SERVICE MANUAL
Air-Cooled
DSP-45AT6N
DSP-55AT6N
DSP-75AT6N
DSP-55VATN
DSP-75VATN
Water-Cooled
DSP-45WT6N
DSP-55WT6N
DSP-75WT6N
DSP-55VWTN
DSP-75VWTN
"Instructions for the use of this manual"
Use this Service Manual in conjunction with Instruction Manual.
DSP–017
Table of Contents
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Summary of Contents for Hitachi NEXT Series

  • Page 1 Confidential HITACHI OIL-FREE SCREW COMPRESSOR NEXT series Mechanical SERVICE MANUAL Air-Cooled DSP-45AT6N DSP-55AT6N DSP-75AT6N DSP-55VATN DSP-75VATN Water-Cooled DSP-45WT6N DSP-55WT6N DSP-75WT6N DSP-55VWTN DSP-75VWTN “Instructions for the use of this manual” Use this Service Manual in conjunction with Instruction Manual. DSP–017...

  • Page 2: Table Of Contents

    Contents 1. GENERAL DESCRIPTION Appearance [Air-Cooled] …………………………………………………………………………………… 1 Components [Air-Cooled]  ………………………………………………………………………………… 2 Appearance [Water-Cooled]  ……………………………………………………………………………… 3 Components [Water-Cooled]  ……………………………………………………………………………… 4 2. FLOW DIAGRAM Flow Diagram [Air-Cooled] ………………………………………………………………………… Flow Diagram [Water-Cooled]  …………………………………………………………………… Capacity Control System Standard  … ……………………………………………………………… 3. MAINTENANCE Standard Maintenance Schedule  ……………………………………………………………………… 13 Maintenance Schedule for Oil Mist Remover ...

  • Page 3: General Description

    1. GENERAL DESCRIPTION 1.1 Appearance Air-Cooled [Front View] Enclosure E n c l o s u r e p a n e l s lower the sound level Air Exhaust Air Exhaust of the air compressor (Air Compressor Package) package. This panel discharges the hot air generated in the air compressor.

  • Page 4: Components [Air-Cooled]

    1.2 Components Air-Cooled [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 Oil mist remover (OMR)

  • Page 5: Appearance Water-Cooled

    1.3 Appearance Water-Cooled [Front View] Enclosure Air Exhaust E n c l o s u r e p a n e l s Air Exhaust (Air Compressor Package) lower the sound level of the air compressor This panel discharges package. the hot air generated in the air compressor.

  • Page 6: Components [Water-Cooled]

    1.4 Components Water-Cooled [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) Oil cooler...

  • Page 7: Flow Diagram

    2. FLOW DIAGRAM 2.1 Flow Diagram Air-Cooled 2.1.1 Fix speed type 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 Oil drain...
  • Page 8 2.1.2 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 Aftercooler condensate drain Cooling air flow Compressed air flow Lubricating oil flow...

  • Page 9: Flow Diagram [Water-Cooled]

    2.2 Flow Diagram Water-Cooled 2.2.1 Fix speed type 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 Aftercooler condensate drain...
  • Page 10 2.2.2 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 Drain discharge Cooling air flow Compressed air flow Lubricating oil flow...
  • Page 11 Cooling Water Flow Intercooler Aftercooler 2nd-stage airend Oil cooler 1st-stage airend Motorized water isolation Water relief pet cock valve (WIVM) Cooling Cooling water water outlet inlet Cooling water outlet Compressed air flow Cooling water flow...

  • Page 12: Capacity Control System Standard

    2.3 Capacity Control System Standard Air-Cooled Water-Cooled 2.3.1 Fix speed type (Load-Unload Operation) The unloading process occurs when the compressed opens and exhausts the internal compressed air to air demand decreases and the discharge pressure rises atmosphere. as high as cut-out pressure. The pressure sensor (PS) The loading process occurs when the compressed air detects the high pressure and energizes the 3-way demand increases and the discharge pressure dropped...
  • Page 13 2.3.2 Fix speed type (AUTO Operation) Air-Cooled Water-Cooled 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 14 2.3.3 Capacity Control System Air-Cooled Water-Cooled Air intake Purging Air Flow and Action of Blowoff Solenoid Valve Blowoff solenoid Blowoff solenoid Operation phase Air Intake filter 1st-stage blowoff solenoid valve (2) valve (1) valve (2) Starting Fully opened Fully closed Loading Fully closed Fully closed...

  • Page 15: Maintenance

    3. MAINTENANCE 3.1 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 16 Category Part or Item Action Type Remarks 1-year 3-year Check / Clean Fixed / V Clean as required. Orifi ce- Aftercooler condensate ▲ Orifi ce and check valve- Intercooler condensate Check / Clean Fixed / V Clean as required. ▲ Check / Clean Fixed / V Aftercooler/ Intercooler/ Oil cooler...
  • Page 17 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 18 Part or Item Action Category Type Remarks Check / Clean Fixed / V Clean as required. (Air-cooled 125psi (0.86)MPa type) Hi-Precooler ▲ Check / Clean Fixed / V ▲ Demister - Drain separator Check Fixed Replace as required. 3-Way solenoid valve & capacity control system ▲...

  • Page 19: Maintenance Schedule For Oil Mist Remover

    3.2 Maintenance Schedule for Oil Mist Remover ① To ensure long and successful operation of the Oil ③ These maintenance inter vals are not considered Mist Remover, follow the standard maintenance warranty. schedule attached below. ④ If an inspected par t is worn, faulty or damaged, ②...

  • Page 20: How To Service The Air Compressor

    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). 4.1 Replacement of Air Intake Filter (Bi-Annually) A pressure sensor is provided on the suction throttle valve to detect the pressure differential across the air...

  • Page 21: Condensate Drain Port (Intercooler/Aftercooler) (Daily Check) Clean The Strainer Elements (Bi-Annually) & Orifices (Annually)

    4.2 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. Daily inspect intercooler/aftercooler condensate drain to verify that there is a discharge of compressed air (with condensate) when the air compressor is loaded.
  • Page 22 ■ Depressurizing the System Before cleaning the drain pipe, intercooler, Aftercooler side aftercooler, control line filter, or replacing the check Ball valve (2) Three-way change valve valve, reduce the internal pressure to 0 (zero) by opening the condensate drain. Stop the air Ⓔ...
  • Page 23 ◆ Cleaning of strainer ■ Cleaning of strainer element The strainers for both the intercooler and aftercooler shall be cleaned. ① Discharge the compressed air in the procedure in page 20. ② Loosen the plug of strainer slowly with release the Element internal pressure.
  • Page 24 ■   C leaning the strainer element during 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 25: Lubricating Oil Replacement (Annually)

    ⑭   M ake sure no oil leaks from the oil drain valve and clogging of the oil strainer and a fire. plugs. ● Be sure to use genuine Hitachi GL-68 DSP compressor. Absolutely DO NOT mix different types of lubricating oil.

  • Page 26: Cleaning Of Oil Strainer (Primary Side) (Bi-Annually)

    4.4 Cleaning of Oil Strainer (Primary Side) (Bi-Annually) ① Drain the lubricating oil in the procedure described in page 23. ② Remove the front door (1) [Ref. No. 904] and left door [Ref. No. 991]. ③ Remove the strainer cover. Then remove the oil strainer and clean it.

  • Page 27: Operation Check Of Air Relief Valve (Bi-Annually)

    4.6 Operation Check of Air Relief Valve (Bi-Annually) ① Maintain the rated maximum discharge pressure (ex. 100psi(0.70MPa)). Relief valve ring [Rear view] ②   P ull the ring connected to air relief valve. ③ Verify that the air relief valve operates properly and get a hand off of the ring.

  • Page 28: Clean Cooler (Annually)

    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 Rear panel (3) Rear panel (2) Rear panel (1) dealer or representative office for the detail.

  • Page 29: Replacement Of Check Valve (2-Yearly)

    4.9 Replacement of Check Valve (2-Yearly) Depressurizing the System Air-Cooled ① Discharge the compressed air in the procedure in Gasket (1) page 20. Gasket (2) Removing the Enclosure Panels Check valve cover (upper) Remove the enclosure panels, such as front door (1) Gasket [Ref.

  • Page 30: Main Motor Greasing

    ③ Close the front door. IMPORTANT ● Contact the local HITACHI distributor/master dealer or representative office for the grease detail. ● Greasing must be done while the main motor The bearing on the opposite side is shield type; filling operating.

  • Page 31: Maintenance Of Main Motor

    ◎ ◎ ◎ ○ 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 32: Maintenance Of Oil Mist Remover

    4.12 Maintenance of Oil Mist Remover 1. Replacement of remover element 3. Maintenance of Relief Valve (See Fig. A.) ① Remove the pipe provided at the top of the remover ①   T urn the nut at the top of the relief valve and remove if required.

  • Page 33: Maintenance Of Cooling Fan And Cooling Fan Motor

    Confidential to Customer 4.13 Maintenance of Cooling fan and cooling fan motor A picture and a drawing below indicate the structure of the cooling fan, fan motor and their fastening. Cooling fan and fan motor is fastened by the left hand screw (L-bolt). Take care so that cooling fan is not damaged when it is removed from the air compressor.

  • Page 34: The Procedure To Attach The Motor Cover [Water-Cooled]

    Confidential to Customer 4.14 The procedure to attach the motor cover Water-Cooled (1) Fixed the thermostat on the DE side of end bracket.     Treat the cable with particular caution. The temperature sensing Be sufficiently careful not to portion is brazed into the damage the temperature sensor.
  • Page 35 Confidential to Customer (3) Fix the motor cover 1 and 2 to the motor cover fixing bracket by M6 bolt and motor eyebolt. 55kW Motor Cover 2 Notch Motor Cover 1 Pull out the temperature sensor Motor eyebolt Temperature Rubber Bush Sensor 5×M6-25 Be sufficiently careful not to...

  • Page 36: Maintenance Of Oil Pump

    Confidential to Customer 4.15 Maintenance of Oil Pump 4.15.1 Removal from the Gear Case Outer Rotor Remove the oil piping from the oil pump. Then, detach Inner Rotor the oil pump from the gear case. (When detaching the Inner Key Snap Ring oil pump, be careful not to damage the gear.) Housing...
  • Page 37 Confidential to Customer 4.15.3 Cleaning and Checking ① Clean the oil pump body, inner rotor, outer rotor, ③ Attach the inner key to the pump side of the shaft. and bearing housing. Then check the sliding Then fit the inner rotor and the outer rotor in this sur faces of the components.
  • Page 38 Confidential to Customer ■ Oil Pump Model ■ Tool Air-Cooled Fix speed type 50Hz : TOP-N340FAM Fix speed type 60Hz/ Vtype : TOP-N330FAM Water-Cooled ALL : TOP-N320FA ■ Replacement Parts When re-assembling, the parts shown in Table 1 must be replaced with new ones. Fig.

  • Page 39: Maintenance Of Suction Throttle Valve

    Confidential to Customer 4.16 Maintenance of Suction Throttle Valve Unloader Body Air Intake Duct 4.16.1 Removing the Suction Throttle Blowoff Valve Assembly Air Cylinder Silencer Assembly ① Remove the air intake filter. See the air intake filter maintenance manual for details. ②...
  • Page 40 Confidential to Customer 4.16.2 Disassembling the Air Cylinder ③ Mark the matching position along the circumference ⑨ Remove the backup ring (F28), and pull out air of the air cylinder. cylinder cover 1 (504), cover 2 (505) from both sides of air cylinder tube (503).
  • Page 41 Confidential to Customer 4.16.3 Cleaning and Checking ① Clean the STV body. In particular, sand the valve ② Fit seal packing (3) (518) to piston (517). Then seat surface with sandpaper until the machining attach air cylinder piston gasket (537) to spindle surface is visible.
  • Page 42 Confidential to Customer ⑦ Attach valve plate (C) (515), spacer (542), and valve ⑩ Attach air cylinder packing (511) to the STV body, plate (A) (514) in this order to the STV body of the and then mount the air cylinder assembly. Check the air cylinder.
  • Page 43 Confidential to Customer (45kW-100psi(0.69MPa)/125psi(0.86MPa), 55kW-125psi(0.86MPa)) (515) (538) (503) (510) (530) (529) (574) (521) (F28) (516) (520) (518) (517) (505) (550) (540) (519) (521) (542) (509) (514) (522) (526) (504) (537) (541) (F27) (525) (536) (535) (522) (55kW-100psi(0.69MPa), 75kW-100psi(0.69MPa)/125psi(0.86MPa)) (574) (F28) (516) (503) (505)
  • Page 44 Confidential to Customer ■ Replacement Parts When re-assembling, the parts shown in Table 1 must be replaced with new ones. Table 1 Air cylinder replacement parts list Valve sheet of blowoff valve piston O-ring (2) 40615070 × 1 40615490 × 2 Fluorine-containing rubber Fluorine-containing rubber A : 1.97inch(50mm)

  • Page 45: Oil Pump Motor And Airend Removal

    Confidential to Customer 4.17 Oil Pump motor and Airend removal 4.17.1 Oil Pump motor removal Drain the lubricating oil from the gear case. After that, disconnect the oil piping and remove the oil pump from the gear case. (When removing the oil pump, be careful not to damage the gear.) Oil Pump 4.17.2 Airend removal...
  • Page 46 Confidential to Customer ① Be sure to remove the Cap nut (313), O-ring (311), Fitting (312) and Oil nozzle (320) from gear casing (301) before removing the airends.; Fig. 4.17.2 (1). WARNING Complete removal of the Oil nozzle (320) and associated components is necessary to prevent damage during the airends removal.

  • Page 47: Oil Casing And Gear Casing Removal

    Confidential to Customer 4.18 Oil casing and Gear casing removal 4.18.1 Oil casing removal ① Attach a eyebolt (M12), and hoist the oil casing. ② Remove the bolt, and detach the oil casing. Oil casing weight ; 73 lbs (33 kg) 4×...

  • Page 48: Main Motor Removal

    Confidential to Customer 4.19 Main motor removal Prepare the additional 2×M16 eyebolts for this procedure. 55kW Motor Weight : 864 lbs (392 kg), 4.19.1 Main motor removing for the fixed speed type. 75kW Motor Weight : 1186 lbs (538 kg) ①...
  • Page 49 Confidential to Customer 55kW Motor Waight 441lbs (200 kg), 4.19.2 Main motor removal for the Vtype. 75kW Motor Waight 507 lbs (230 kg) ① With hanging the motor by using a two motor eyebolts, remove the 8×M16-45 bolt for the gear casing and shaft seal cover, and remove the 2×M16-60 for the motor and base plate ②...

  • Page 50: Replace The Bushing

    Confidential to Customer 4.20 Replace the Bushing 4.20.1 Main motor removal (Ref. 4.19 Main motor removal) 4.20.2 Oil pump motor removing (Ref 4.17 Oil Pump motor and Airend removal) 4.20.3 Oil pump gear shaft removal Oil Pump Gear Shaft ① Remove the 6×M10 bolts. ②...
  • Page 51 Confidential to Customer Fixed speed type (A) External diameter : φ13.8654〜φ15.3250inch (φ352.181〜φ389.257mm) (B) Internal : φ2.36inch (φ60mm) Weight : 42.11〜50.93 [lbs] (19.1〜23.1 [kg]) Vtype (A) External diameter : φ15.0637〜φ15.7013inch (φ382.620〜φ398.813mm) (B) Internal : φ2.16inch (φ55mm) Fig. 1 Bull gear detailed dimension Weight : 49.4/53.8 [lbs] (22.4/24.4 [kg]) Caution 1.
  • Page 52 Confidential to Customer 4.20.5 Bushing replacement ■ Removal procedure ① Loosen the 10×M16 bolts and remove the shaft seal cover from the main motor. ② Remove the 4×M8 flat head bolt. For the Vtype, remove the M6 set screw. ③ Remove the bushing, O-ring (inside) and collar together by using the general pulley remover.
  • Page 53 Confidential to Customer 4.20.6 Attach the bull gear ① Attach the key. Bull gear Gear retaining plate ② Apply the anti seizing paste between the motor shaft and the bull gear. Anti seizing paste shall be the molybdenum disulfide basis. ③...

  • Page 54: Pinion Gear Replacement Procedure

    Confidential to Customer 4.21 Pinion Gear Replacement Procedure 4.21.1 Removing the Air End Remove the air end. see p. 43 “4.17 Oil Pump motor and Airend  removal” 4.17.2 Airend removal) 4.21.2 Pulling Out the Pinion Gear Attach the pinion gear pull-out tool. When attaching Max Oil Pressure the tool, ensuring that the O-ring is not stuck.
  • Page 55 Confidential to Customer ■ Tool (1) Dimensions of the removing tool dimension • 1st-stage side Part code No : 59031290 1. Thermal refining required (quenching at 850°C to 950°C(1562℉ to 1742℉), Material : SCM415H (mm) tempering at 550°C to 650°C(1022℉ to 1202℉)) Hardness: HRC 32 to 40 PS1/4, 15 deep 2.

  • Page 56: Battery Replacement (6-Yearly)

    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 57: Inspection Of Thermistor And Pressure Sensor

    Confidential to Customer 4.23 Inspection of Thermistor and Pressure Sensor If the thermistor or pressure sensor shows any sign of failure during operation, replace the part in accordance with the part name listed below. Table 1 Thermistor/pressure sensor part name list Code Sensor type Remarks...
  • Page 58 Confidential to Customer ■ Sensor position for air-cooled type [Fixed speed type] ■ Connection position on the PCB side LCD PCB side CPU PCB side (See the back side of instrument panel.) (control panel side) CN10 CN16 (From TH2) (From PS2) CN13 CN11 (From TH3)

  • Page 59: Parts List

    5. 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 60 Motor Assembly [Fixed speed type] 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 392 Cover, visco seal...
  • Page 61 Suction [Fixed speed type] 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 510 Rod Metal...
  • Page 62 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) 645 Duct Panel (5)
  • Page 63 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 623 Intercooler Assembly...
  • Page 64 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 65 Control Panel [Fixed speed type] 707 G14 45/55/75 kW (Air coold only) (Water cooled only) ※D12 Water cooled cooled G05 (Water cooled only) E48 (Air cooled only) Ref. Description 700 Control Panel 701 Electromagnetic Contactor (42) 702 Electromagnetic Contactor (6) 704 Electromagnetic Contactor, Fan Motor 705 Fuse (1A) 706 Fuse (1.25A)
  • Page 66 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 E10 DCBL Controller...
  • Page 67 Control Panel Air-Cooled    75 kW Ref. Description 700 Control Panel 701 Electromagnetic Contactor (52) 704 Electromagnetic Contactor, Fan Motor 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...
  • Page 68 Control Panel    Water-Cooled 75 kW Ref. Description 700 Control Panel 701 Electromagnetic Contactor (52) 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 69 Air Pipe Air-Cooled 125 psi (0.86 MPa) type 100 psi (0.69 MPa) type Ref. Description 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) 025 Air Piping (4) 026 Air Piping (5) 027 Air Piping (6) 028 Air Piping (7)
  • Page 70 Air Pipe Water-Cooled Ref. Description 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) 027 Air Piping (5)
  • Page 71 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 F68 Support (1), condensate piping Air-Cooled...
  • Page 72 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 880 Oil Strainer...
  • Page 73 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 D35 O-Ring...
  • Page 74 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. Description 900 Blowoff Silencer 901 Seat, blowoff silencer 902 Cover, blowoff silencer B38 Plate, blowoff piping...
  • Page 75 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) Adapter...
  • Page 76 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 A95 Adapter, control air piping...
  • Page 77 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 78 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 A95 Adapter, control air piping...
  • Page 79 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 80 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 81 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 82 Enclosure (1) Water-Cooled 925 926 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 83 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 E60 Duct (2), Starter Box...
  • Page 84 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 85 DSP Service Manual 2014.10 Hitachi Industrial Equipment Systems Co.,Ltd. Printed in Japan...

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