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Hitachi SRL Series Instruction Manual

Oilfree scroll compressor
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Instruction Manual
SRL-Series
HITACHI OILFREE SCROLL COMPRESSOR
Model  : SRL-7.5M6LL/SRL-7.5M6ML
Thank you for the recent purchase of a HITACHI Oilfree Scroll Air Compressor.
Please read this instruction manual carefully for installation, maintenance and
inspection guidelines of the HITACHI Scroll Air Compressor. After reading this
instruction manual, please keep it on hand for future reference.
SRL-7.5M6LH/SRL-7.5M6MH
SRL-11M6LL/SRL-11M6ML
SRL-11M6LH/SRL-11M6MH
SRL-16.5M6LL/SRL-16.5M6ML
SRL-16.5M6LH/SRL-16.5M6MH
Pressure Units Clarification
Pressure is indicated in units of
"psig" in this Instruction Manual.
Please review the table below
for the conversion of "psig"
units to "MPa" units.
Unit of pressure
psig
122
measurement
MPa
0.84
Conversion - 1 psig = 0.00689 MPa
CM1E029-00
Jul. 2011
145
1.0

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Table of Contents
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  Summary of Contents for Hitachi SRL Series

  • Page 1 0.84 Conversion - 1 psig = 0.00689 MPa Thank you for the recent purchase of a HITACHI Oilfree Scroll Air Compressor. Please read this instruction manual carefully for installation, maintenance and inspection guidelines of the HITACHI Scroll Air Compressor. After reading this instruction manual, please keep it on hand for future reference.
  • Page 2 ● If any description in the instruction manual in unclear, please contact the local Hitachi distributor. ● Sections of this instruction manual may be subject to change without notice. ● If service is required and/or an alarm occurs, please contact the local Hitachi distributor with the following information: ○...
  • Page 3 Using the air compressor to compress any gas other than air may lead to damage of the air compressor. ● SRL air compressors are not designed, intended or approved for breathing air applications. Hitachi does not approve specialized equipment for breathing air applications and assumes no responsiblity or liability for compressors used for breathing air services.
  • Page 4 For more details, contact the local Hitachi distributor. 【122PSIG Model】 ● Contact the local Hitachi distributor for the completion of the overhaul required every 20,000 hours or every 8 years of standard use. The overhaul has to be completed in this period, or earlier depending on the operating environment.
  • Page 5: Table Of Contents

    Safety Precautions (continued) CAUTION ● If the air compressor has not run in over one (1) month, carry out the long term storage operation prior to restarting the air compressor (See page 28). Failure to adhere to this precaution may cause abnormal wear to the air compressor components, damage to the air compressor and/or accidents.
  • Page 6: Daily Operating Components

    Daily Operating Components Air Compressor Exterior SRL-7.5M6LL/ML/LH/MH SRL-11M6LL/ML/LH/MH Control Panel Air Exhaust Compressed Air Emergency Stop Discharge Pipe Switch Power Cable Inlet Locks for door enclosure with Keys Air Intake Front Door ● Intake air and cooling air is supplied to the air ●...
  • Page 7 Daily Operating Components(continued) Air Compressor Interior SRL-7.5M6LL/ML/LH/MH SRL-11M6LL/ML/LH/MH Air Release Valve Secondary Cooler Safety Relief Valve Ventilating Fan Primary Cooler V-Belt Check Valve Main Power Supply Terminal Block Rubber Hose Electric Main Motor Scroll Head Power Supply Panel Intake Air Filter Electromagnetic ●...
  • Page 8: Installation

    Installation 1 Product Confirmation 1. Check the air compressor nameplate to verify that Model Nameplate the proper model air compressor was delivered. 2. Verify that there has been no damage to the air ● Review the model number, serial number, compressor during transportation.
  • Page 9: Installing The Air Compressor

    If the suction and exhaust openings cannot be provided, do not modify the air compressor without consulting the local Hitachi distributor. 4. The allotted space located to the right and to the rear of the air compressor must be maintained to perform maintenance.
  • Page 10 Installation(continued) 【Please see the table to the below for Reference】 ■ Generated Heat & Required Ventilating Capacity Table The required ventilating capacity value is the required capacity to keep the temperature rise in the room within 9° F (5℃ ) when only one Oilfree Scroll Air Compressor is operating. SRL-7.5M6LL SRL-11M6LL SRL-16.5M6LL...
  • Page 11: Piping The Air Compressor

    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.
  • Page 12: Wiring The Air Compressor

    Installation(continued) 5 Wiring the Air Compressor Connecting the Main Power Earth Leakage (Ground) Circuit Breaker 1. Carry out the electrical work according the local and national electric codes and standards. 2. Connect the power supply for the main motor through an earth leakage (ground) circuit breaker between the main power and the Oilfree Scroll Air Compressor.
  • Page 13 Installation(continued) 3. Make sure to ground the air compressor. Ground Terminal 4. For AC208/230V models, the air compressor ships wired for AC230V, to operate the air compressor at Reconnect Do not AC208V, reconnect the wiring of the transformer the wiring reconnect primary to the 208V terminal.
  • Page 14 Installation(continued) Remote Input and Output Signals The following input and output signals terminal block is equipped in the power supply control panel. # Input Signals Output Signals ① ② ③ ④ ⑤ ⑥ # Use shielded wires as input signal wires. Terminal Content How to use...
  • Page 15 Installation(continued) Terminal Content How to use Description This signal is outputted when the ④ Operation Signal operation is ON. This signal is outputted when the The output is a non-voltage signal. The load connected ⑤ Error Signal errors occur and the air compressor should be 250VAC/30VDC, 5A or less and should use an cannot be restarted.
  • Page 16: Operation

    Operation 1 Control Panel Descriptions ● If an error during start up occurs, please contact the local Hitachi distributor. Control Panel Digital Display (Yellow) Maintenance Alarm Light (Red) Compressor Operation Light (Green) Indicates: Lights up during compressor operation. Lights up to inform operating...
  • Page 17 Operation (continued) 【Screen Shift Switch Operation】 The total operation time of the unit and each compressor head is indicated. Press the switch and the display will change as indicated in the diagram below. The total operation time of the unit or each compressor head will only be displayed for 3 seconds, and then the discharge pressure will be displayed.
  • Page 18: Prior To Operation

    Operation (continued) 2 Prior to Operation ● This section details the operation, activation and control methods of the SRL air compressor. It is possible to select the operation control mode of the air compressor, change the control pressure settings and set the automatic recovery from power failure. It is recommended that the selection of the appropriate settings be selected based on the conditions in which the compressor will be used.
  • Page 19 Operation (continued) 2. Changing the Pressure Settings The control pressure can be changed with the Pressure Setting switches shown below on the control panel. An energy saving operation can be performed to 122PSIG Model 145PSIG Model lower wasted energy by lowering the maximum (stop) Maximum (Stop) pressure.
  • Page 20 Operation (continued) ■ Changeable Pressure Ranges 122 PSIG Model Pressure Maximum (Stop) Recovery (Start) Pressure Pressure Unit Description Pressure (psig) Pressure (psig) Bandwidth (psig) Interval of Change Standard Pressure Changeable 122 - 92 110 - 80 Pressure Range 145 PSIG Model Pressure Maximum (Stop) Recovery (Start)
  • Page 21 Operation (continued) Once Standard [STOP] Maximum Pressure (122psig/145psig) T h e m a x i m u m ( S t o p ) P r e s s u r e setting has been c h a n g e d o n t h e control panel of the air compressor.
  • Page 22 Operation (continued) Automatic recovery from power failure does not function under default setting. It is possible to set automatic recovery from power failure by operation on the control panel. Digital Display Start Switch Stop Switch Operate the switches on the control panel as shown below in order to automatically recover from power failure.
  • Page 23: Start Up

    Operation(continued) 3 Start Up (Please contact the local Hitachi distributor for start up.) ① Close the front door and fully open the ⑥ Slightly pull the spindle of the safety relief valve discharge stop valve. when the air compressor is near maximum pressure.
  • Page 24: Daily Operation

    Operation(continued) 4 Daily Operation ■ Start ① Completely open the stop valve on the air receiver. ② Verify that the earth leakage (ground) circuit breaker is ON. ③ Turn ON the main power supply. ④ Select appropriate operation control mode of the air compressor. ⑤...
  • Page 25: Maintenance And Inspection

    Maintenance and Inspection ■ Daily inspections of the SRL air compressor are imperative to long safe operation. Review the total operating hours on the control panel of the air compressor with the operation time schedule shown on the table below and carry out the inspection at the proper time intervals. ■...
  • Page 26 ※ Carry out the maintenance and inspections based on the recommended total operating hours and/or calendar time in the maintenance schedule, whichever occurs first. ※ It is recommended to request maintenance and inspection from the local Hitachi distributor for any items in the shaded area (...
  • Page 27         122PSIG model : 19,000 - 19,500 hours         145PSIG model : 9,000 - 9,500 hours CAUTION ● Be sure to perform all maintenance and overhauls according to the maintenance schedule. Contact the local Hitachi distributor, in order to reset the warning.
  • Page 28 Operation (continued)
  • Page 29 ● Check Valve Inspection To inspect the check valve, stop the air compressor. If the air compressor reverse rotates for 3 seconds or longer when it stops, the check valve is leaking and should be replaced. Contact the local Hitachi distributor for replacement.
  • Page 30 Maintenance and Inspection (continued) ● Inspection of the Ventilating Fan Ventilation Exhaust of the Air Compressor Verify that there is a discharge from the air exhaust port of the air compressor to confirm that the ventilating fans operate properly. 500 Hours and/or 2 Months Maintenance and Inspection Procedures WARNING ●...
  • Page 31 5,000 Hours and/or 2 years Maintenance and Inspection Proceedures ● Rubber Hose Replacement Replace the rubber hose every 5,000 hours or 2 years. Contact the local Hitachi distributor for replacement. 10,000 Hours and/or 4 Years Maintenance and Inspection Procedures ・・・・ 122PSIG Model 5,000 Hours and/or 2 Years Maintenance and Inspection Procedures ・・・・・...
  • Page 32 20,000 Hours and/or 8 Years Maintenance and Inspection Procedures ・・・・ 122PSIG Model 10,000 Hours and/or 4 Years Maintenance and Inspection Procedures ・・・・ 145PSIG Model It is recommended to call the local Hitachi distributor for these maintenance and inspection items, including the replacement of the scroll head (see page 21 and/or 22).
  • Page 33: Troubleshooting

    Replace the printed circuit board (Please contact the local Printed circuit board failure Hitachi distributor). Motor breaker trips ("E.CO." is Please contact the local Hitachi distributor to eliminate the indicated on digital display) probable cause and reset the thermal relay. Scroll head and/or electric motor...
  • Page 34 F and reset the air compressor. If the error re- A.THI alarm occurs and the ambient temperature is below 104 ° F, contact the local Hitachi distributor. This alarm is displayed when the total operating Maintenance alarm hours exceeds 2,500 hours. Carry out inspection and maintenance of the air compressor.
  • Page 35 Reset the air compressor and if the error re-occurs, contact the local Hitachi L o w e r s c r o l l h e a d ̲...
  • Page 36 ̲ ̲ All scroll heads maintenance E.nT. shutdown (7.5/11M6) ̲ ̲ All scroll heads maintenance ̲ E.nT. shutdown (16.5M6) NOTE; For other error indications, please contact the local Hitachi distributor.
  • Page 37: Parts List

    Electric Motor (IE3 3HP) 760195 Electric Motor (IE3 7.5HP) 760197 760210 Printed Circuit Board 760211 Pressure Sensor 740374 Temperature Sensor 743274 Orifice Fitting 756504 Note: Contact the local Hitachi distributor for any parts not mentioned on the list provided above.
  • Page 38: Wiring Diagram

    Wiring Diagram SRL-7.5M6LL/ML/LH/MH, SRL-11M6LL/ML/LH/MH...
  • Page 39 Wiring Diagram (continued) SRL-16.5M6LL/ML/LH/MH...
  • Page 40: Standard Specifications

    Standard Specifications Model SRL-7.5M6LL SRL-11M6LL SRL-16.5M6LL Output HP(kW) 10 (7.7) 15 (11) 22 (16.5) Maximum Rated Pressure PSIG (MPa) 122 (0.84) Factory Pressure Settings PSIG (MPa) ON : 110 (0.76) - OFF : 122 (0.84) Operating Ambient Temperature Range ° F (℃ ) 32 -...
  • Page 41: Aftermarket Ordering Procedure

    Using the air compressor to compress any gas other than air may lead to damage of the air compressor. ● SRL air compressors are not designed, intended or approved for breathing air applications. Hitachi does not approve specialized equipment for breathing air applications and assumes no responsibility or liability for compressors used for breathing air services.
  • Page 42 Log Book...
  • Page 43 Log Book...
  • Page 44 Maintenance and Inspection Logbook Table Maintenance and inspection results Next Maintenance service Inspection Inspection Initials of date of completion Intake air Check Rubber Ventilating date and service employee Other (MM/DD/YYYY) filter valve hose schedule date Hitachi Industrial Equipment Systems Co., Ltd.