Hanshin Machinery GRH 3 series User manual

User’s Manual of Compressor

The user s manual is prepared, based on GRH3-100A.
Read this manual carefully before installing and operating the compressor
and use it properly.
In addition, after reading this manual, keep it close to the compressor for
future reference such as repair, maintenance or trouble.
DANGER
Be sure to check airend rotating direction
when operating the compressor for the
first time after installation.
If it rotates in the opposite direction, the
airend can be damaged.
Be sure to check the
rotating direction !

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Thank you for purchasing Hanshin Compressor. Hanshin Screw Compressor is the product
developed by our long history, abundant experience and accumulated technology.
The screw compressor has been verified for the performance by examined design and
appropriate reliability test and is conveniently programmed to be optimally operated when the
control-related data are automatically calculated and changed if a user simply changes the
operation pressure by Micom s control almost close to AI.
The function guarantees that the compressor operates optimally, so the company assures of high
performance, highly evaluated from users.
Every machine and controller may show 100% of the performance as long as it is
clearlyunderstood and well maintained. Please read this manual carefully before use.
GRH3 star-delta User’s Manual
Preface

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Contents
About how to use the manual
1. About Safety
2. Names of Parts
3. Electric Wiring
4. Installation and Piping
5. Operations
6. Troubleshooting
7. Maintenance
8. Control System
9. Specifications
10. Maintenance Checklist
11. Operation Log
12. Quality Warranty
13.
Outside Drawing by Models
1-1 General Cautions
1-2 About Marks and Symbols
1-3 Check Caution/Warning Label
1-4 Safety Rules
1-5
Installation Place and Cautions for Installation
1-6 Cautions for Electric Wiring
1-7 Cautions for Operation
1-8 Cautions for Stoppage
1-9 Cautions for Maintenance
2-1 GRH3-20A, 25A, 30A, 35A, 50A
2-2 GRH3-75A, 100A
3-1 Wiring
3-2 Power Facilities
4-1 Identification of the product specifications
4-2 Cautions for Transportation
4-3 Cautions for Installation
4-4 Cautions for Piping
5-1 Micom Controller
5-2 Operation Control
5-3 Initial Operation & Routine Operation
5-4 Schedule Operation
5-5 Remote operation
5-6 Remote Monitoring System[Micom]
5-7 Remote Monitoring System[Computer]
5-8 Micom Display Configuration & Operations
5-9 Operation Data Setup and Check
6-1 Protective Devices and LCD Message List
6-2 Trouble Causes and Measures
7-1 Regular Maintenance
7-2 Maintenance Method
8-1 Compressor Configuration Layout
8-2 Control Circuit
8-3 Operation Flow Chart
8-4
Arrangement Diagram and Spec. of Control Parts
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GRH3 star-delta User’s Manual

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About how to use the manual
The screw compressor is intended to be used domestically (the Republic of Korea).
The manual describes the routine operation, repair and maintenance of the manual as well as the
installation, general management and periodic maintenance of it.
Before installing the compressor, carefully read this manual, fully understand it and follow the description.
Also, keep this manual handy for future reference.
If you find any doubtful content in the manual, please contact your dealer or the company s A/S service
center(TEL.[phone]).
Type Explanation
The informative plate as model, serial number, operation pressure and voltage is attached on the left side of
the compressor. Please fill it for your regular maintenance and parts order.
GRH3 - 100 A
Output (HP)
Air cooling : A / Water cooling type : W
MODEL
SERIAL NO
WORK PRESSURE
VOLTAGE
MANUFACTURING
Do not directly inhale compressor air nor use it for machines designed for the
respiratory organs.
Direct inhalation may cause dangerous unexpected accidents such as dyspne
Warning
GRH3 star-delta User’s Manual

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About how to use the manual 1. About Safety
1. About Safety
For the safety purpose, read the cautions and warnings specified in the manual carefully and fully
understand them for proper use. The chapter especially highlights the safety items.
1-1 General Cautions
The installation, operation, preservation, repair and other works of the product should be executed by a
competent engineer.
If a user adds a control circuit to the product or attempt to modify or alter the product without permission,
it may cause physical injuries or damages on the product due to the malfunction of the protective devices,
which may not be covered by the warranty. At the moment, the product may be repaired by our pay
service.
Do not use the compressed air of the compressor for direct inhalation or air supply source of the
respiratory organs. It may cause dangerously physical injuries.
[Warning] or [Caution] in the manual contains important information that should be always followed.
1-2 About Marks and Symbols
The important items to be noted for the safe use and trouble avoidance are marked as below, so every
operator should understand and keep them.
Marks
Warning
The mark is displayed when there is any possibility of death, serious injuries or
other dangerous situation unless the product is handled properly.
Warning
Caution
The mark is displayed when there is any possibilityof slight injuries, dangerous
situations and damages on properties unless the product is handled properly.
Caution
Prohibition
It means prohibited operation or handling.
The prohibition is displayed as characters in the mark.

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Caution
Electric shock
The power should be off before checking the electric
box because of the danger of electric shock.
After turning it off, a sign, “Power-off for check”
should be indicated to avoid accident.
Caution
Discharge pressure ejection
When checking/replacing parts, the compressor
should stop with the pressure set to 0
A special attention should be paid around a safe
valve because it may work during operation.
Warning
Be careful of being rolled by rotation
Do not touch yourself or other articles on any
rotating parts such as main/fan motor.
The power should be off before repair,
maintenance and other works
Caution
Beware of a scald
Oil cooler, air end and tank may be very hot during
or just after operation, probably causing a scald.
When working around any heating source, you
should wait until it is cooled after turn-off
1-3 Check Caution/Warning Label
1. GRH3-20A, 25A, 30A, 35A, 50A
GRH3 star-delta User’s Manual

1. About Safety
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Warning
Be careful of being rolled by rotation
Do not touch yourself or other articles on any
rotating parts such as main/fan motor.
The power should be off before repair,
maintenance and other works
Caution
Beware of a scald
Oil cooler, air end and tank may be very hot during
or just after operation, probably causing a scald.
When working around any heating source, you
should wait until it is cooled after turn-off
Caution
Cautious of Inhalation
Poorly-ventilated indoor operation may cause death
or accident.
Do not directly inhale the compressed air nor use
it for air supply of the respiratory organs.

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2. GRH3-75A, 100A
GRH3 star-delta User’s Manual
Caution
Electric shock
The power should be off before checking the electric
box because of the danger of electric shock.
After turning it off, a sign, “Power-off for check”
should be indicated to avoid accident.
Caution
Discharge pressure ejection
When checking/replacing parts, the compressor
should stop with the pressure set to 0
A special attention should be paid around a safe
valve because it may work during operation.
Warning
Be careful of being rolled by rotation
Do not touch yourself or other articles on any
rotating parts such as main/fan motor.
The power should be off before repair,
maintenance and other works
Caution
Beware of a scald
Oil cooler, air end and tank may be very hot during
or just after operation, probably causing a scald.
When working around any heating source, you
should wait until it is cooled after turn-off

1. About Safety
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Warning
Be careful of being rolled by rotation
Do not touch yourself or other articles on any
rotating parts such as main/fan motor.
The power should be off before repair,
maintenance and other works
Caution
Beware of a scald
Oil cooler, air end and tank may be very hot during
or just after operation, probably causing a scald.
When working around any heating source, you
should wait until it is cooled after turn-off
Caution
Cautious of Inhalation
Poorly-ventilated indoor operation may cause death
or accident.
Do not directly inhale the compressed air nor use
it for air supply of the respiratory organs.

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1-4 Safety Rules
Common rules
Before operating, maintaining or repairing the compressor, fully
understand the manual.
Make sure to wear proper safety devices and uniform when
repairing or maintaining the compressor. Especially, when
assembling or disassembling a heavy article, you should put on
helmet and safety boots.
Since a very hot air may be emitted, you should wear protective
uniform or goggles.
Setting or re-setting the values of the compressor should be
executed by an expert. If it is not possible, an engineer(worker)
should follow the directions from an expert or an experienced
engineer.
GRH3 star-delta User’s Manual

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1. About Safety
Transportaion
Using a forklift
Using a crane
When transporting the product, it needs covering with a cloth to
avoid scratch or transformation.
A forklift used to transport it should be a suitable type to avoid
overturn and other accidents.
When transporting the compressor using a crane, check the load
and slowly moveit by using a rope or a crane.
Thecompressor should be covered with a cloth or shock-absorbing
materials to protect against the rope on the top.
When moving it using a crane, move it slowly while
leveling. Unbalanced transportation may cause a fall,
probablyleading to a loss of lives.
Warning
No one is allowed to be under the compressor while it
is being moved. It may cause a loss of lives.
Warning

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1-5 Installation Place and Cautions for Installation
Place
The compressor is designed to use indoors. Please avoid installing it outside.
Installation
GRH3 star-delta User’s Manual
Air-tight space
Installing in a place directly exposed to raindrops or
underground with hot ambient temperature may
cause electric shock, drain or rust.
Caution
Installing the compressor in a place with vibration
may cause bad contact, destruction of air end and
piping, so a measure should be taken before the
installation
Caution
If the compressor is installed in a place with harmful
gas, it may cause oxidization of lubricant and
corrosion parts.
Caution
Do not leave any flammable materials around the
compressor. Any work causing a fire is also
prohibited. Once a flame is moved into the
compressor, it may cause damages.
Caution
Do not install the compressor in a place with 40°…and
higher ambient temperature. It may cause a fire or
damages on the compressor.
Caution
When installing it in an airtight space, it needs
induction and ventilation pipes. And the vent needs a
fan to ventilate the space.
Caution

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1. About Safety
Wiring should be executed in accordance with the indoor wiring
rules of the common industrial technology standard, electric facility
standards.
Wiring should be executed only by a competent electrician.
When wiring on the terminals of the compressor, it should be wired
to avoid any bending part while a hole into which wires are
penetrated should be protected for the sheath from vibration by
using rubber and other materials.
Install a circuit breaker suitable for the type on the power lead-in.
Connect the grounding to the grounding terminal inside the electric box.
The grounding should be type 3 grounding if the voltage is lower than
AC400V or special type 3 grounding if the voltage is AC400V and higher.
1-6 Cautions for Electric Wiring
Wiring
Circuit Breaker
Protective Devices
Grounding
Since electric leakage, weak insulation, overcurrent, ground fault,
open-phase operation or defect of protective devices may cause a
fire on electric circuits, it should be wired in accordance with the
indoor wiring rules and periodically maintained.
Caution
Removing and improving the compressor protective devices or
changing the settings may cause an accident. Never attempt to
change or alter the settings of protective devices.
Caution
Without grounding, it may cause an electric shock accident or
failure of the compressor.
Caution

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1-7 Cautions for Operation
GRH3 star-delta User’s Manual
If a trouble occurs, immediately stop the operation to
avoid any physical injuries or damages on the
compressor. In an emergency, promptly press
Emergency Stop button to stop it.
Caution
The compressor’s discharge pressure is very high.
Never inject it toward a person.
Caution
To avoid any electric shock, the power should be off
before repairing or maintaining the compressor.
Caution
Do not leave any flammable materials around the
compressor. Never attempt a work probably causing a
fire.
Caution
Do not inhale the compressed air from the compressor
nor use it as the air supply for the respiratory organs.
Caution
Do not try welding or any similar works around the
compressor. Flames may cause a fire.
Caution

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1. About Safety
Do not touch any hot parts of the compressor during
or just after operation. Also, during maintenance, do
not touch yourself on them. It may cause a serious
scald.
Caution
Make sure to turn off the power before handling the
main motor or fan motor.
Warning
Note that operation stand-by in auto mode or
compressor stoppage in schedule operation may
resume the operation.
Caution
Do not set the pressure higher than the specification
on the plate of the compressor. It may cause a trouble.
Caution

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GRH3 star-delta User’s Manual
1-8 Cautions for Stoppage
Parallel Operation
Once the compressor stops, close the ball and
valve of the discharge pipes to avoid any
backward flowing of water and other materials.
1-9 Cautions for Maintenance
Pressure
Power
Power
Keep the operation log.
Make sure to use the genuine parts only. The
compressor may not work nor cause a trouble
unless the genuine parts are used.
Stoppage for a long while
Turn off the main power when the compressor
is not used for period of long time.
Operate it once a week for, at least, 30 minutes
to avoid rust inside pipes of the compressor.
Routine Maintenance
Routinely check the compressor.
For the checklist, refer to the contents specified
in page 63
Valve closed
Operation
Stoppage
Stop the compressor and check whether the pressure
is set to “0” bar and whether any remaining pressure
inside pipes exists.
Caution
When replenishing oil or checking the electric box,
make sure to turn it off first.
Caution

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1. About Safety 2. Names of Parts
Front side
Rear side
2. Names of Parts
upper cover
Micom
oil gauge window
front-left door
front-right door
compressed air
discharge outlet
rears-side door
air inlet
vent duct connector
right-side door(R)
right-side door(L)
power cable lead-in opening
left-side door(R)
left-side door(L)
2-1 GRH3-20A, 25A, 30A, 35A, 50A
Fully understand the names and functions of parts relating to the routine operation and manage the compressor.
1. Appearance

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cooling fan
control panel
power cable
connection
oil inlet
oil gauge
oil discharge valve
vent duct
compressed air
discharge outlet
main motor
motor base
discharge pipe
Oil/After cooler
discharge pressure
connection
motor pully
pully belt
inhalation valve
aie end pully
holding pressure
valve
safety valve
internal
puressure switch
separator tank
thermostat valve
oil filter
air end
inhanlation valve
2. Inside
GRH3 star-delta User’s Manual
internal pressure
gauge

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2. Names of Parts
Front side
Rear side
upper cover
front-right door
front-left door
oil gauge window
Micom
front-right door
rears-left door
rears-right door
vent duct connector
right-side door
right-side door
air inlet
power cable
lead-in opening
left-side door
air inlet
2-2 GRH3-75A, 100A
Fully understand the names and functions of parts relating to the routine operation and manage the compressor.
1. Appearance
compressed air
discharge outlet