Hitachi NEXT Series Manuale utente

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.

INSTRUCTION MANUAL

DSP-90A6N DSP-110A6N

DSP-90VA6N DSP-110VA6N

●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.

HITACHI Oil-Free Rotary Screw Air Compressor

Air-Cooled

DSP-90W6N DSP-110W6N

DSP-90VW6N DSP-110VW6N

Water-Cooled

GRAPHIC DESCRIPTIONS:

WARNING

：Indicates warnings. If handled

improperly, death or severe injury

could result.

CAUTION

：Indicates cautions. If handled

improperly, injury and/or physical

damage could result.

Air-Cooled

：Indicates air-cooled type.

：Indicates water-cooled type.

：Indicates variable speed type.

Water-Cooled

IMPORTANT

：Indicates information that needs

attention, other than WARNING and

CAUTION.

：Indicates a reference page.

How to Use This Instruction Manual

■Model Code

●This Instruction Manual covers the standard models of the Hitachi DSP air compressor.

●This Instruction Manual intended to assist daily operators and maintenance personnel

in the installation, operation, control and service of the air compressor.

●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 INSTRUTION MANUAL near the air compressor to make it available at any

time, and refer to it as the need arises.

●If there are any questions or comments, please contact the local Hitachi distributor/

master dealer or representative office.

●Fill your compressor’s model name, Serial Number, etc. in Section 13 of this

Instruction Manual. Such information may be helpful when ordering parts, periodic

maintenance, and overhaul.

●For improvement of the product, contents in this manual are subject to change without notice. Please be forewarned.

DSP-90VA6N

Dry or Oil-Free Rotary

Screw Air Compressor

Packaged

NEXTseries

Frequency (5: 50 Hz, 6: 60 Hz)

Cooling Method (A: air-cooled ,

W: water-cooled)

V: V type

without V: fixed-speed type

Nominal Output (kW)

WARNING

Never remove a protective device from the air compressor or

modify the air compressor.

It is imperative to install an earth leakage (ground) circuit breaker

on the power cable. This prevents a ground fault accident.

DSP 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 respon-

sibility or liability for compressors used for breathing air services.

Contents

1. SAFETY PRECAUTIONS  ………………………………………………………………………………………… 2

GENERAL DESCRIPTION

2.1 Appearance……………………………………………………………………… 6

2.2 Components …………………………………………………………………… 8

2.3 Daily Operating Components  ……………………………………………… 10

OPERATING PROCEDURE

3.1 Instrument Panel ……………………………………………………………… 12

3.2 Start/Stop Operation  ………………………………………………………… 14

3.3 How to Use the Liquid Crystal Display (LCD)……………………………… 15

3.4 How to Use the Digital Monitor  …………………………………………… 25

3.5 Daily Operation of Air Compressor ………………………………………… 32

3.6 Daily Operation of Oil Mist Remover ……………………………………… 34

3.7 Adjusting Procedure…………………………………………………………… 35

4. TROUBLESHOOTING 4.1 Protective Device……………………………………………………………… 36

 4.2 Troubleshooting of Air Compressor………………………………………… 38

4.3 Troubleshooting of Oil Mist Remover……………………………………… 39

INSTALLING AND PIPING

5.1 Unpacking the Air Compressor ……………………………………………… 40

THE DSP5.2 Conveying the Air Compressor ……………………………………………… 40

5.3 Installing the Air Compressor  ……………………………………………… 41

5.4 Piping the Air Compressor …………………………………………………… 42

5.5 Ventilation of Air Compressor Room ……………………………………… 45

6. STARTUP OPERATION 6.1 Startup Operation of the Air Compressor ………………………………… 47

6.2 Initial Setting of OMR Regulator …………………………………………… 50

7. WIRING 7.1 Power Supply Equipment …………………………………………………… 51

7.2 MIV and WIVM Wiring ………………………………………………………… 51

7.3 Connecting the Power Cable ………………………………………………… 52

7.4 Wiring Diagram………………………………………………………………… 54

7.5 Control Panel /LCD monitor Specifications  ……………………………… 54

STANDARD COMPONENTS

8.1 Standard Components………………………………………………………… 60



AND SUBSYSTEMS

8.2 Air/Oil/Water Flow……………………………………………………………… 61

8.3 Cooling Water  ………………………………………………………………… 66

8.4 Capacity Control System……………………………………………………… 67

8.5 Oil Mist Remover System …………………………………………………… 73

9. MAINTENANCE 9.1 Periodical maintenance of Air compressor………………………………… 74

9.2 Standard Maintenance Schedule …………………………………………… 75

9.3 Maintenance Schedule for Oil Mist Remover……………………………… 79

9.4 How to Service the Air Compressor………………………………………… 80

10. CAUTIONS FOR A LONG TERM OPERATION SUSPENSION…………………………………………… 94

11. PARTS LIST  ………………………………………………………………………………………… 95

12. RELOCATION AND12.1 Relocation…………………………………………………………………… 119

DISPOSAL 12.2 Disposal……………………………………………………………………… 119

13. WARRANTY AND 13.1 Warranty……………………………………………………………………… 120





AFTER-SALES SERVICE

13.2 After-Sales Service ………………………………………………………… 120

14. OPERATION RECORD LOGBOOK…………………………………………………………………………… 121

15. STANDARD SPECIFICATIONS………………………………………………………………………………… 122

1. SAFETY PRECAUTIONS

013B0816

012B1240012B1240

Rotating Parts!

●Keep hands and rods, etc. away from

the rotating parts (Cooling fans, etc.)

●Use caution at all times, when air com-

pressor is powered. The air compres-

sor may be capable of restarting with-

out hitting the START button.

●When the air compressor is operating,

do not remove or open the enclosure

panels and doors.

●

Before servicing the air compressor,

stop it, disconnect the power, espe-

cially when accessing any rotating parts.

WARNING

Hot Surface!

●Do not directly touch any component

inside the air compressor enclosure

when the air compressor is operating

or immediately after it has stopped,

as the components are extremely hot

and can cause severe injury.

●Before servicing the air compressor,

stop it, disconnect the power, then

wait for the air compressor to cool

down.

Heated!!

Air End

Discharge Air pipe

Hot Surface!

●Do not directly touch any component

inside the air compressor enclosure

when the air compressor is operating

or immediately after it has stopped,

as the components are extremely hot

and can cause severe injury.

●Before servicing the air compressor,

stop it, disconnect the power, then

wait for the air compressor to cool

down.

Air End

Discharge Air Pipe

Hot Surface!

Aftercooler

Intercooler

WARNING

Heated!!

WARNING

Heated!!

●Do not directly touch any component

inside the air compressor enclosure

when the air compressor is operating

or immediately after it has stopped,

as the components are extremely hot

and can cause severe injury.

●Before servicing the air compressor,

stop it, disconnect the power, then

wait for the air compressor to cool

down.

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.

DSP-90/110A6N

90/110VA6N

Air-Cooled

1. SAFETY PRECAUTIONS

013B0816

012B1240012B1240

Do Not Breathe Air!

Discharge air can contain Carbon Monoxide and

other contaminants. Breathing the air can cause

severe injury or death.

High Pressure Air!

●

High pressure air can cause severe injury or death.

Be careful when air compressor is operating.

Pressurized air can blow out of air relief valves and

etc. at incredibly high velocities.

●When using compressed air to clean equipment,

use extreme caution and/or wear eye protection.

●Before servicing the air compressor, stop it,

disconnect the power, and relieve pressure before

removing filter, plug, fitting or cover.

Rotating Parts!

●Keep hands and rods, etc. away from the rotating

parts (Cooling fans, etc.)

●Use caution at all times, when air compressor is

powered. The air compressor may be capable of

restarting without hitting the START button.

●When the air compressor is operating, do not

remove or open the enclosure panels and doors.

●Before servicing the air compressor, stop it, dis-

connect the power, especially when accessing

any rotating parts.

Electric Shock Hazard!

●

Before servicing or wiring the air compressor,

disconnect the power. This will prevent anyone

from turning on the power and causing an electric

shock that could lead to severe injury or death.

●

Do not allow any unlicensed person to wire the air

compressor. Always use a licensed electrician.

●Ground the air compressor.

Electric Shock Hazard!

●Before servicing or wiring the

air compressor, disconnect

the power. This will prevent

anyone from turning on the

power and causing an elec-

tric shock that could lead to

severe injury or death.

●Do not allow any unlicensed

person to wire the air compres-

sor. Always use a licensed

electrician.

●Ground the air compressor.

WARNING

WARNING WARNING

WARNING

Hot Surface!

●Do not directly touch the air end, discharge air

pipe,and coolers when the air compressor is

operating and immediately after it has stopped,

because these parts are heated then.

●

Before servicing the air compressor (especially

when accessing to the heated parts), stop it, discon-

nect the power, and wait until it is cooled down.

WARNING

1. SAFETY PRECAUTIONS

013B0816

012B1240012B1240

Hot Surface!

WARNING

Heated!!

Air End

Discharge Air pipe

Hot Surface!

WARNING

Air End

Discharge Air Pipe

Heated!!

Aftercooler

Intercooler

Heated!!

Hot Surface!

WARNING

Rotating Parts!

●Keep hands and rods, etc. away from

the rotating parts (Cooling fans, etc.)

●Use caution at all times, when air com-

pressor is powered. The air compres-

sor may be capable of restarting with-

out hitting the START button.

●When the air compressor is operating,

do not remove or open the enclosure

panels and doors.

●

Before servicing the air compressor,

stop it, disconnect the power, espe-

cially when accessing any rotating parts.

●Do not directly touch any component

inside the air compressor enclosure

when the air compressor is operating

or immediately after it has stopped,

as the components are extremely hot

and can cause severe injury.

●Before servicing the air compressor,

stop it, disconnect the power, then

wait for the air compressor to cool

down.

●Do not directly touch any component

inside the air compressor enclosure

when the air compressor is operating

or immediately after it has stopped,

as the components are extremely hot

and can cause severe injury.

●Before servicing the air compressor,

stop it, disconnect the power, then

wait for the air compressor to cool

down.

●Do not directly touch any component

inside the air compressor enclosure

when the air compressor is operating

or immediately after it has stopped,

as the components are extremely hot

and can cause severe injury.

●Before servicing the air compressor,

stop it, disconnect the power, then

wait for the air compressor to cool

down.

Water-Cooled

DSP-90/110W6N

90/110VW6N

1. SAFETY PRECAUTIONS

013B0816

012B1240012B1240

Electric Shock Hazard!

WARNING

●Before servicing or wiring the

air compressor, disconnect

the power. This will prevent

anyone from turning on the

power and causing an elec-

tric shock that could lead to

severe injury or death.

●Do not allow any unlicensed

person to wire the air compres-

sor. Always use a licensed

electrician.

●Ground the air compressor.

Do Not Breathe Air!

Discharge air can contain Carbon Monoxide and

other contaminants. Breathing the air can cause

severe injury or death.

High Pressure Air!

●

High pressure air can cause severe injury or death.

Be careful when air compressor is operating.

Pressurized air can blow out of air relief valves and

etc. at incredibly high velocities.

●When using compressed air to clean equipment,

use extreme caution and/or wear eye protection.

●Before servicing the air compressor, stop it,

disconnect the power, and relieve pressure before

removing filter, plug, fitting or cover.

Rotating Parts!

●Keep hands and rods, etc. away from the rotating

parts (Cooling fans, etc.)

●Use caution at all times, when air compressor is

powered. The air compressor may be capable of

restarting without hitting the START button.

●When the air compressor is operating, do not

remove or open the enclosure panels and doors.

●Before servicing the air compressor, stop it, dis-

connect the power, especially when accessing

any rotating parts.

Electric Shock Hazard!

●

Before servicing or wiring the air compressor,

disconnect the power. This will prevent anyone

from turning on the power and causing an electric

shock that could lead to severe injury or death.

●

Do not allow any unlicensed person to wire the air

compressor. Always use a licensed electrician.

●Ground the air compressor.

WARNING WARNING

WARNING

Hot Surface!

●Do not directly touch the air end, discharge air

pipe,and coolers when the air compressor is

operating and immediately after it has stopped,

because these parts are heated then.

●

Before servicing the air compressor (especially

when accessing to the heated parts), stop it, discon-

nect the power, and wait until it is cooled down.

WARNING

2.1 Appearance

Air-Cooled

DSP-90/110A6N

90/110VA6N

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.

[Front View]

[Rear View]

2. GENERAL DESCRIPTION

Enclosure

Oil Filling Port

Air Intake

(Inlet to the Air End)

Oil Level Gauge

OMR

Sling Fitting

Instrument Panel

Left Door

Plate of Operating /

Servicing Instructions

Air Exhaust

(Air Compressor Package)

Compressed Air Discharge

Power Supply Port

Air Intake

(Air Compressor Package)

Air Exhaust

Air Intake

Enclosure panels

lower the sound level

of the air compressor

package.

Use the port to fill the

gear case with oil.

This indicates the

quantity of the oil in

the gear case. Check

the oil level before

starting the DSP and

when operating it.

Use the sling fitting

when moving and

installing the DSP air

compressor.

3.1

Read carefully the

plate before operating

and servicing the DSP.

8.5 for the details

This panel discharges

the hot air generated

in the air compressor.

Check the specifica-

tions, power supply

and voltage before

connecting the power

supply.

Air Exhaust

Air Intake

Air Intake Air Intake

Air Intake

(Air for inverter)

Air Intake

(Air for coolers)

Model designation,

manufacturing number

and specification are

printed.

Compressor Name plate

Open the left door only

when servicing the

DSP air compressor.

Keep it closed when

operating the DSP air

compressor.

Water-Cooled

DSP-90/110W6N

90/110VW6N

[Front View]

[Rear View]

2. GENERAL DESCRIPTION [Appearance]

Enclosure

Oil Filling Port

Air Intake

(Inlet to the Air End)

Oil Level Gauge

OMR

Sling Fitting

Instrument Panel

Left Door

Plate of Operating /

Servicing Instructions

Air Exhaust

(Air Compressor Package)

Compressed Air Discharge

Power Supply Port

Air Intake

(Air Compressor Package)

Air Exhaust Air Intake

Enclosure panels

lower the sound level

of the air compressor

package.

Use the port to fill the

gear case with oil.

This indicates the

quantity of the oil in

the gear case. Check

the oil level before

starting the DSP and

when operating it.

Use the sling fitting

when moving and

installing the DSP air

compressor.

3.1

Read carefully the

plate before operating

and servicing the DSP.

Open the left door

only when servicing

the DSP air compres-

sor. Keep it closed

when operating the

DSP air compressor.

8.5 for the details

This panel discharges

the hot air generated

in the air compressor.

Check the specifica-

tions, power supply

and voltage before

connecting the power

supply.

Air Exhaust

Air Intake

Air Intake Air Intake

Air Intake

(Air for inverter)

Air Intake

(Air for Package)

2.2 Components

Cooling fan

Check valve

Intercooler

Aftercooler

Oil filter

Oil cooler

Air intake filter

1st-stage air end

2nd-stage air end

Main motor

Oil mist remover

Discharge pipe (Compressed

Air Discharge)

Oil level gauge

Common base

Control panel

Air relief valve Enclosure

Instrument panel

Hi-precooler

Air-Cooled

DSP-90/110A6N

90/110VA6N

2. GENERAL DESCRIPTION [Components]

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