SMC Networks IDU3E-10 User manual

IDX-OM-J029-B
Initial issue: June, 2005
2nd edition: November, 2010
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Operation Manual
PRODUCTNAME
Refrigerated Air Dryer
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MODEL/ Series
IDU3E-10IDU3E-20
IDU4E-10IDU4E-20
IDU6E-10IDU6E-20
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Please read this manual prior of using the air dryer. Keep the manual readily available for
reference.
© 2010 SMC CORPORATION All Rights Reserved.

To Customers
Thanks for purchasing SMC Refrigerated Air Dryer.
This opertion manual must be read and understood throughoutly before handling. It provides all essential
information for maximizing product operating efficiency, as well as, for safe and longer life span operation.
For safety operation of SMC Refrigerated Air Dryer, read thoroughly and follow stated safety instructions, as well
as regulation stated within ISO 4414*1 & JIS B 8370*2.
*1) ISO 4414: Pneumatic fluid power – Recommendations for the application of equipment to transmission
and control systems.
*2) JIS B 8370: Pneumatic fluid power – General rules relating to systems
This manual explains about installation and operation of the product. Only those who have thorough
understanding of the fundamental operating procedure or have basic knowledge and skills of handling industrial
product for the installation and operation of the product are qualified to perform installation and operation.
The contents of the operation manual and the other documents attached to the product cannot become a part of
the contract clause or cannot change and modify existing agreements, promises, and relationship.
Any statements contained in the operation manual cannot be newly guaranteed and modify existing guarantee
certificate.
You are not allowed to copy any part of this operation manual for usage of third person without informing it to us
beforehand.
Caution: Please understand that the contents of this operation manual are subject to
changed without previous notice.

Table of Contents
Table of Contents - 1
Table of Contents
To Customers
Chapter i Safety Instructions
i - 1 Warning: Before Using Air Dryer.........................................................i - 1
i - 1 - 1 Meanings of signs: Caution, Warning, Danger..............................................i - 1
i - 2 Danger Classifications / Position of Danger warning label......i - 3
i - 2 - 1 Danger Classifications..................................................................................i - 3
i - 2 - 2 Danger of Electricity.....................................................................................i - 4
i - 2 - 3 Danger of high Heat.....................................................................................i - 4
i - 2 - 4 Danger of Rotor............................................................................................i - 4
i - 2 - 5 Danger of CompressedAir Circuit ...............................................................i - 4
i - 2 - 6 Positions of Danger Warning Label..............................................................i - 5
i - 2 - 7 Danger of Refrigerant...................................................................................i - 6
i - 2 - 8 Cautions about Usage..................................................................................i - 7
i - 2 - 9 Other Label..................................................................................................i - 7
i - 3 Disposal.......................................................................................................i – 8
i - 4 Limited warranty and Disclaimer / Compliance Requirements ........i – 9
Chapter 1Parts Name and Functions
1 - 1 Parts Names and Functions................................................................ 1 - 1
Chapter 2Transportation / Installation
2 - 1 Transportation.......................................................................................... 2 - 1
2 - 2 Installation.................................................................................................. 2 - 2
2 - 2 - 1 Location ..................................................................................................... 2 - 2
2 - 2 - 2 Anchorage.................................................................................................. 2 - 2
2 - 2 - 3 Air piping.................................................................................................... 2 - 2
2 - 2 - 4 Drain Tube.................................................................................................. 2 - 3
2 - 2 - 5 Electric wiring............................................................................................. 2 - 4
2 - 3 Cautions about reinstallation............................................................. 2 - 5
Chapter 3Operation / Shutdown
3 - 1 Check points before operation ..........................................................3 - 1
3 - 2 Operation.................................................................................................... 3 - 1
3 - 3 Shutdown ................................................................................................... 3 - 2
3 - 4 Cautions about restart........................................................................... 3 - 2
3 - 5 Check points before restart................................................................. 3 - 2
3 - 6 Precautions for long-term non-operation...................................... 3 - 2
Chapter 4Maintenance
4 - 1 Daily inspection....................................................................................... 4 - 1
4 - 2 Periodical maintenance........................................................................ 4 - 1
4 - 2 - 1 Cleaning of ventilation grille (suction grille)................................................. 4 - 1
4 - 2 - 2 Service parts.............................................................................................. 4 - 1
4 - 2 - 3 Cleaning of Auto Drain Strainer.................................................................. 4 - 1
Chapter 5Troubleshooting............................................................................................ 5 - 1
Chapter 6References
6 - 1 Specifications........................................................................................... 6 - 1
6 - 2 Dimensions................................................................................................ 6 - 2
6 - 3 Electrical Circuit...................................................................................... 6 - 3
6 - 4 Compressed Air and Refrigerant Circuit / Operation Principles.....6 - 4

i Safety Instructions
iSafety Instructions
Be sure to read and comprehend important cautionary
notifications in this operation manual before use
Do not operate the product without the cover panel.
i – 1 Warning: Before Using Air Dryer
In this chapter, the stated contents are especially about safety way to use the product. for customer.
An Air Dryer is installed on the downstream of the air compressor to remove moisture. We, manufacturer, cannot
take any responsibility if you use it for any other purpose.
An Air Dryer works with high voltage and has some parts that gets hot or rotates during operation. Ask vendor if you
need component replacement and servicing.
Not only people handle the air dryer but every people who perform maintenance on or do works related to it should
read safety instructions on this operation manual before handling.
This operation manual is not a general safety manual which is practiced by safety training representatives.
People who handle this product or work around it need to take training to comprehand inherent risks of it and master
measures for safety.
It is usually responsible for super visor to follow the safety instructions, but each operator or maintemance
representative should do daily operations on their own head.
Operators and maintemance representatives should take the safety of working place and work environment into
account.
It is necessary to think of the safety of working place and work environment for each task
Take enough safety training before the operation training. It is very dangerous to do operation training without any
safety training. Operation training must be paid attention to its safety.
Keep this operation manual handy for workers related to above contents to refer to anytime.
i – 1 – 1 Meaning of Signs: Caution, Warning, Danger
These safety instructions are intended to prevent hazardous situation and/or product damage.
These instructions indicate the level of potential hazard by signs “Caution”, “Warning” or
“Danger”. Contents with these signs state about important instructions concerning safety. Confirm
where those signs are, and read and comprehend notices and cautionary notices well before
handling.
“Caution”, “Warning” or “Danger” is the order of importance (Danger>Warning>Caution). Followings
are the meanings of those signs.
Danger
Statements with the “Danger” sign explain about conditions in which there is a
possible result of serious injury or loss of life if someone handles wrongly during
operation or maintenance and did not follow the procedure to avoid danger.
i- 1

i Safety Instructions
Warning
Statements with the “Danger” sign explain about possibilities that can result in
serious injury or loss of life if someone handle wrongly during operation or
maintenance and did not follow the procedure to avoid danger.
Caution
Statements with the “Danger” sign explain about possibilities that can result in injury
or product damage if someone handles wrongly during operation or maintenance and
did not follow the procedure to avoid danger.
i- 2

i Safety Instructions
i – 2 Danger Classifications / Position of Danger Warning Label
To protect operator’s sefety, we group danger into some types uniquely and attached labels indicating those types.
Comfirm the contents of the danger types and positions of the labels before operation.
Warning
No one but professionals should operate an air dryer.
Transportation, installation, and maintenance involve risks. These should be done by
someone who have enough knowledge and experience about this product and incidental
devices.
No one but our service personnel or qualified person should open the cover panel of this
product.
Warning
Should any problem occur, address it according to statements on this manual.
•Identify problems according to “Chapter 5 Troubleshooting.”
•Ask repair and maintenance.
Warning
The product should not be operated in the event of any problems.
When the product gets out of order, shutdown it immediatery, and contact our service
person or qualified person.
i – 2 – 1 Danger Classifications
Specific danger classification of this product is as follows.
Danger of Electricity
Since this product runs at hign voltage, there is the danger of electric shock. So, we display a
symbol with indications, “Caution”, “Warning” or “Danger,” on the product and this manual.
Danger of Heat
Since this product becomes hot while driving, there is the danger of burn injury. So, we display a
symbol with indications, “Caution”, “Warning” or “Danger,” on the product and this manual.
Danger of Rotor
Since this product has parts that rotate whiledriving, there is the danger ofcatching your fingers in
or injury. So, we display a symbol with indications, “Caution”, “Warning” or “Danger,” on the
product and this manual.
i- 3

i Safety Instructions
i – 2 – 2 Danger of Electricity
Inside of this product, there is power-supplying section with high voltage separated by the
cover panel. Do not operate the product without the cover panel.
No one but trained qualified person should operate or inspect in the power transmission
sections.
Warning
Read with caution and pay attention to the notations on danger warning labels.
Do not remove or rub danger warning labels.
Confirm the positions of danger warning labels.
i – 2 – 3 Danger of High Heat Warning
Since this product has parts that become hot during operation, there is the danger of burn
injury resulting from contact with them. What is more, there is also the danger of burn injury due to
remaining heat after the power supply is cut. Therefore, wait until the temperature of hot parts become
50oCand below.
i – 2 – 4 Danger of Rotor Warning
Since this product has parts that rotate during operation, there is the danger of burn injury
resulting from contact with them. Though sometimes those parts can temporarily stop the rotation,
they will rotate again, and so do not work with them while driving.
i – 2 – 5 Danger of Compressed Air Circuit
Warning
Before replacing or cleaning parts, be sure to bleed compressed air remain inside of the
product untill the gauge indicates “0”. If you do not do this air-bleeding, there would be the
great danger of unexpected accident, such as shooting out of parts when they are being unscrewed.
i- 4

i Safety Instructions
i – 2 – 6 Positions of Danger Warning Label
Warning
Read with caution and pay attention to the notations of danger warning labels.
Do not remove or rub danger warning labels.
Confirm the positions of danger warning labels.
Front
WARNING 警告
!
1 Remove panels for maintenance only.
2 Never insert anything into product to ensure
safety.
3 Cut power prior to maintenance to prevent
electric shock.
4 Settle product to room temp.before main-
tenance toprevent burn or frostbite.
5 Ensure zero air pressure before replacing parts.
1 点検以外はﾊﾟﾈﾙを取り外さないこと。
2 回転物があるので指、棒状の物を差し
込まないこと。
3 感電の恐れがあるので、点検の前には電源を
切ること。
4 火傷の恐れがあるので、点検の前には装置を
常温にすること。
5 部品交換の前には必ず、空気圧力を"0"に
すること。
!
i- 5

i Safety Instructions
i – 2 – 7 Danger of Refrigerant Caution
This product uses Fluorocarbon (HFC) as a refrigerant.
This product is specified by “Class 1 Fluorocarbon Collection and Destruction Law in
Japan.”
It is strictly forbitten to emit Fluorocarbon to the atmosphere. Before you repair this
product, you should collect the refrigerant with “Refrigerant collector.” Then, ask a
destruction agency to dispose of collected refrigerant. No one but someone have enough
knowledge and experience about the product and incidental device should do the collection
of the refrigerant.
No one but service person or qualified person should remove the cover panel of the
product.
The quantity and the sort of the Fluorocarbon are mentioned on the specification label that
are explained on Page i – 8.
Fluorocarbon Collection and Destruction Law in Japan
フロン回収破壊法第一種特定製品
This product uses
Fluorocarbon (HFC) as a refrigerant.
1 It is strictly forbidden to emit Fluorocarbon
to the atmosphere.
2 When disposing this product, Fluorocarbon
must be collected in an appropriatemanner.
3 The kind of Fluorocarbon and the amount used
in this product is prited on the name label.
この製品には冷媒として、
フロン類（ＨＦＣ）が使われています。
1 フロン類をみだりに大気中に放出することは
禁じられています。
2 この製品を廃棄する場合には、フロン類の回収が
必要です。
3 フロン類の種類及び数量は、型式銘板に記載
されています。
Front
i- 6

i Safety Instructions
i – 2 – 8 Cautions about Usage Warning
Read with caution and pay attention to the notations on danger warning labels.
Do not remove or rub danger warning labels.
Cimfirm the positions of danger warning labels.
i – 2 – 9 Other Label
Comfirm the model, contents of specifications on the label.
Front
S
p
ecification Label
Contents
MODEL: Model
VOLTAGE: Power supply voltage (frequency)
RUNNING CURRENT: Running current
REFRIGERANT: Type of refrigerant (amount)
WEIGHT:WeightMAX.PRESS: Maximum
operating pressure
SERIAL No.: Serial No.
MANUFACTURING DATE: Manufacturing Date
MADE IN: Country of manufacture
AIR DRYER
MODEL
VOLTAGE
RUNNING CURRENT
REFRIGERANT
WEIGHT MAX.PRESS.
SERIAL No.
MAKER
MADE IN
CAUTION 注意
!
1 Read manual before operation.
2 Ensure vantilation and maintenance
space.
3 Keep water away from the product.
4 Secure In / Out connector with spanner
during piping.
5 Wait 3 minutes before restart.
6 Ensure Running Condition / Evaporating
Temp. in green zone.
1 ご使用前に必ず取扱説明書を読んでください。
2 通風、メンテナンススペースを確保して
ください。
3 雨や水滴がかからないようにしてください。
4 ＩＮ／ＯＵＴポートをスパナで固定して
配管 してください。
5 再起動は運転停止３分後に行ってください。
6 Ｒ ＵＮＮＩＮＧ Ｃ ＯＮＤＩＴＩＯＮ・蒸 発温度 計は
グリーン帯で使用してください。 Front
i- 7

i Safety Instructions
i – 3 Disposal
When you dispose of the product, you shoud collect the refrigerant and the refrigerat oil enclosed in the refrigerant
circuit.
Caurion
A sort of Fluorocarbon (HFC) is used for this product as refrigerant.
This product is specified by “Class1 Fluorocarbon Collection Destruction Law
in Japan.”
It is strictly forbitten by the law to emit the refrigerant to the atmosphere. Before
you repair this product, you should collect the refrigirant with “Refrigerant
collector.” Then, ask a destruction agency to dispose of collected refrigerant.
No one but someone have ebough knowledge and experience about the product
and incidental devices should do the collection of the refrigerant.
No one but service person or qualified person shoud remove the cover panel of
the product.
The quantity and the sort of the Fluorocarbon are printed on the specification
label.
Caution
Dispose of the refrigerant and refrigerant oil according to the bylaw or regulation
of local government.
Do not dispose of refrigerant oil together with domestic garbage. And do not
burn it in unauthorized incinerators.
No one but someone have enough knowledge and experience about the product
and incidental devices should do the collection of the refrigerant oil.
No one but service person or qualified person shoud remove the cover panel of
the product.
If there are something not clear, please contact our service office.
i –8

i Safety Instructions
i – 4 Limited warranty and Disclaimer / Compliance Requirements
The product used subject to the following “Limited warranty and Disclaimer“ and “Compliance Requirements.
Read and accept them before using the product.
Limited warranty and Disclaimer
1. The warranty period of the product is 1 year in service or 1.5 years after the product is delivered.
Also, the product may have specified durability, running distance or replacement parts. Please consult
your nearest sales branch.
2. For any failure or damage reported within the warranty period which is clearly our responsibility, a
replacement product or necessary parts will be provided.
This limited warranty applies only to our product independently, and not to any other damage incurred
due to the failure of the product.
3. Prior to using SMC products, please read and understand the warranty terms and disclaimers noted in
the specified catalog for the particular products.
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Compliance Requirements
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1. The use of SMC products with production equipment for the manufacture of weapons of mass
destruction (WMD) or other weapon is strictly prohibited.
2. The exports of SMC products or technology from one country to another are govemed by the relevant
security laws and regulation of the countries involved in the transaction. Prior to the shipment of a SMC
product of a SMC product to another country, assure that all local rules goveming that export are known
and followed.
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Caution
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The Product is provided use in manufacturing industries.
The product herein described is basically provided for peaceful use in manufacturing industries.
If considering using the product in other industries, consult SMC beforehand and exchange
specifications or a contact if necessary.
If anything is unclear, contact your nearest sales branch.
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i –9

1 Name and Functions Parts
1 Parts Name and Functions

1-1 Parts Name and Functions
Front
PanelLock 
Another one is on opposite side
Illuminated Switch
(ON/OFF Switch)
The lamp is continuously ON
during normal operation. Use it
for ON/OFF operations.
Right Side Ventilation
Grille (Outlet)
Waste heat will be exhausted
as hot air by the fan motor. Do
not block with wall and so on.
Inspection Grille
Confirm the discharge of drain
from this grille once a day.
Evaporation
thermometer
(EVAPORATING TEMP)
Indicates the temperature of
refrigerant of low-pressure
side.
During normal driving, it
indicates in the green zone.
Discharges drain.
Drain Tube
Auto Drain
Do not remove the insulation on
the auto drain.
V
iew with Front Panel removed
1 - 1

1 Name and Functions Parts
•AC 100V specification
Air Outlet (OUT)
・AC 200V specification
Fixing Screw for Front Panel
Another one is on the right side.
Air Inlet (IN)
Left Side Ventilation
Grille (Inlet)
Breathe in cooling air
from this grill. Do not
bung up with wall and so
on.
Screw for the Earth
Connect the earth to this
screw
Power Cord
Insert the plug to an
outlet for exclusive use of
100V AC.
Front
Rear Panel
You can see the terminal block when
you remove this cover. Connect the
power cable through the membrane
grommet.
Membrane Grommet
Powercordoutlet
Front
L N PE
（  ）
Customer Connection Side
Terminal Connecting Screw: M3
Applied Pressure Terminal: 1.25-3
(Width 6.5mm and below)
1 - 2

2 Transportation / Installation
Transportation / Installation
２
Warning
Use the product in the right way. During Installation, operation, maintenance, and check,
you should be careful in keeping the safety of human body.
Caution
Transportation, installation, and maintenance including dangerous work must be done by
a personnel who has enough knowledge and experience about the product and the
sysytem.
2‑1 Transportation
When you transport the product, you should follow these instructions below.
•You should uplift the product from the base surface with careful attention to prevent falling sideways and drop.
•Do not bring the product lying sideways. If you lay it sideways, it will be broken.
•Do not hang up the product.
•Do not transport the product with any part such as an air filtermounted on the fittings at the air inlet or outlet port
of the product. If it is unavoidable to transport the product with such a part mounted, support the mounted part
with a bracket to prevent the product from being affected by vibration during transportation.
Warning
Those instructions above must be followed because the product is so heavy that it carries
a great risk to transport.
IDU3~6E are 20kg or more. They must be transported by more than one person, a forklift
and so on.
2 - 1

2 Transportation / Installation
2‑2 Installation
2‑2‑1 Location
The product should not be used or stored in the circumstances as follows. Those
circumstances will cause not only malfunction but also failures.
•Environment where the product is exposed to
rainwater, moisture vapor, salty water, oil and
so on.
•Locations where dust or particles are.
•Locations where inflammable or explosive gas
are.
•Locations where corrosive gas, solvent,
combustible gas are.
•Locations that receive direct sunlight or where
radiant heat is generated.
•Locations where ambient temperature is
beyond following range:
On-stream: 2 ~ 40oC
Storage: 0 ~ 50oC (when there is no drain
water inside of the piping)
•Locations where temperature changes rapidly.
•Locations where strong electromagnetic noise
is generated (locations where electromagnetic
field, strong magnetic field, surge is generated)
•Circumstances where static electricity is
produced or discharged through the body of the
product.
•Locations where strong high frequency wave is
generated.
•Locations where danger of thunder is apparent.
•Locations by loading on vehicles, marine
vessels, and so on.
•Locations whose altitude is higher than 2,000
meters.
•Circumstances where strong vibration or impact
are transmitted.
•Circumstances where too much force and
weight are put on the body of the product that
causes it to deform.
•Circumstances where enough spaces cannot
be taken to do maintenance (in the plant where
the product is operated).
Spaces needed for maintenance
Front : 600 mm
Rear : 600 mm
Top : 600 mm
Right : 600 mm
Left : 600 mm
•Locations the ventilation grille of the product
can be blocked.
•Place where rejection style air of air
compressor or other driers (hot wind) is inhaled.
2‑2‑2 Anchorage
•The air dryer should be installed on a vibration-free, stable, horizontal flat surface.
•Refer to “Chapter6 6-2 Dimensions” for the dimensions.
•IDU3E~6E should be bolted by anchor bolts to prevent falling. We recommend the anchor bolt sets that
we are selling separately as accessories.
2‑2‑3 Air piping
•Connection to the inlet and outlet of compressed air should be made removable by using union and so on.
•Pressing the hexagonal fitting with screw wrench and so on, connect the air piping fittings to the body.
•When mounting any part such as an air filter on the fitting at the compressed air inlet or outlet port, support the
part to prevent excessive force from being applied to the product.
•Be careful not to let the vibration of the air compressor transmit.
•If the temperature of compressed air on the inlet side is higher than 50oC, place an aftercooler after the air
compressor. Or, make the temperature of the place where the air compressor is installed lower than 50oC.
2 - 2

2 Transportation / Installation
•Flash the piping sufficiently in order to avoid any foreign substances such as dust, sealing tape, liquid gasket,
etc. when piping before piping connection.Foreign substances in the piping can cause cooling failure or
drainage failure.
•Use pipes and fittings that have enough endurance against the operating pressure and temperature. And
connect it firmly to prevent air leakage.
•Provide bypasspiping to make it possible to do maintenance without stopping the air compressor.
We recommend the bypass piping sets that
we are selling separately as accessories.
The bypass piping sets
2‑2‑4 Drain Tube
•A polyurethane tube of 10mm external diameter is attached to the drain tube. The outlet end of the tube is
released to atmosphere. And let drain flow through the tube into a scupper and so on.
•Using the pressure of the compressed air, drain will be discharged periodically. Fix the outlet end of the tube so
as not to swing during discharge.
•Prevent the drain tube from riser piping.
•Prevent the drain tube from being folded or flatted. Since the drain tube is coming from the bottom of the body,
be careful to avoid the body from stomping over the tube during installation.
Warning
During drain work, follow the procedure that you define to keep the safety of worker (ex. Put on
protective glass, apron, and gloves).
In case that oil gets mixed in the wasted water that isdischarged from the auto drain, the waste liquid treatment
is necessary. Handle it following the bylaw or regulation of local government.
2 - 3

2 Transportation / Installation
2 – 2 – 5 Electric Wiring
Warning
No one but qualified person should do the wiring work.
･Before wiring, you must cut the power off for safety. Do not work under any energized
conditions.
･Supply power from a stable place, which is free from the effect of surge.
･Ensure that a Ground Fault Circuit Interrupter(GFCI) with appropriate capacity for
earth leakage and load is used in the power supply of the product to prevent electrical
shock and burnout of the compressor motor. See “6-1 List of specifications” for
details.
･Supply power for the product should meet the specifications.
･The product should be grounded for safety.
･Do not connect the earth to a water pipe, a gas pipe, or a lightening rod.
･Do not plug too many leads into a single socket. That causes exothermic heat or fire.
･Do not convert the wiring to use.
･In European countries, a circuit breaker that meets the IEC standard should be used
for the supply power.
There are two methods depends on model (specified power).
IDU3E-10 ~ 6E-10 (100V specified)
•Insert the power plug into an outlet of 100V AC.
Install a Ground Fault Circuit Interrupter(GFCI) to the power supply (sensitivity of leak current
30mA and rated current 10A). (Prepare by yourself)
•Do not extend the power cable using power strip andso on. That causes decrease of thevoltage and theproduct
cannot be operated.
IDU3E-20 ~ 6E-20 (200Vspecified)
•Remove the terminal block cover or the rear cover in the rear of the product, and connect the power (200V AC)
to the terminal block.
•Install a Ground Fault Circuit Interrupter(GFCI) to the power supply (sensitivity of leak current 30mA and rated
current 5A).(Prepare by yourself)
Specification of power cable
Prepare following power cable.
Power cable: 1.25mm2(16AWG), Three-cores (including the earth), External diameter: about 8 ~ 12mm
Additional length of about 0.1m is needed to wire inside of the product.
Length of the power cable
The length of the power cable should extend less than 30m from the product.
Connecting to the power supply
Connect the power cable and the earth to the terminal block. M3 screw is used for theconnection part. Make sure
to use round crimped terminal.
Applicable crimped terminal: 1.25-3 (Width: 6.5mm and below)
Wiring procedure
•Remove the terminal block cover or the rear panel.
•Insert the cord through the membrane grommet and connect it to the terminal block (refer to the label on the
terminal block).M3 screw tightening torque: 0.6~1Nm
During wiring work, do not touch other sections except terminal block.
•Attach the cover or the rear panel as it were.
2 - 4

2 Transportation / Installation
2‑3 Cautions about Reinstallation
Caution
No one but someone who has enough knowledge about the product and
incidental devices should reinstall in another place. And following instructions
must be executed.
If you move the product and reinstall it into another place after some operations (including trial running),
instructions that are not only following ones but also all of those in the chapter 2 should be followed.
Disassembly of the power cable
Cut off the power source when you disassemble the power cable.
Warning
No one but qualified personnel should do the electric wiring.
Cut off the power supply for safety before the wiring. Do not work under energized
condition.
Disassembly of the air piping
Warning
No one but qualified personnel should do the air piping.
Separate the compressor from the product for safety before removing the piping.
Do not remove any piping when there is remaining compressed air pressure inside
of it.
•Remove the seal tape completely after detaching the piping. Remained tape will cause imperfect cooling
and failure by entering into the body of the product.
Residual compressed air pressure release procedure
•Even while the dryer is removed, only when compressed air is needed, open the bypass piping valve.
•Close the compressed air inlet and outlet valve.
•Unscrew the front panel fixing screw (in 2 points) and remove the front panel with upholding it a little.
•Open the residual pressure release cock of auto drain tube, and release compressed air pressure left inside of
the product. Refer to the figure at right. Case Assembly
The ramainder depressure cock.
※It opens when turning in the
drection og the arrow of figure.
2 - 5

3 Operation / Shutdown
3 Operation/Shutdown
Caution
No one but someone who has enough knowledge and experience about the product and
incidental devices should operate or shut down the product.
3-1 Check points before operation
Before a trial running, check following points.
•Installed Condition
By visual inspection check that the product is installed horizontally.
About IDU3E ~ 6E, make sure the product is fixed enough with anchor bolts.
Do not place heavy obstacles on the product and add unreasonable loading by piping and so on.
•Wiring Connections
Power cord, and the earth should be connected firmly.
•Drain Tube
Drain tube should be connected correctly.
•Air Piping
Make sure the piping for compressed air is connected correctly. Those valves of IN / Out side of the product and
of the bypass piping should be completely fasten.
3-2 Operation
Start operation according to the procedure below.
•Turn on the breaker of the main power supply. Then, turn on the illuminated switch.
•The lamp will light up. Few minutes later, the cooling fan will rotate and hot air will be exhausted from the
ventilation grille.
Place of the ventilation grille: IDU3E ~ 6E: Right Side Ventilation Grille
•Open the IN / Out side valve slowly. Make sure the bypass valve is completely closed. Confirm there is no air
leakage.
•Depending on the condition of compressed air or ambient temperature, the cooling fan sometimes alternates
between rotation and stop at the beginning. Then, the refrigerator will go into continuous run and the pointer of
the evaporation thermometer will indicate in the green zone. If the pointer of the evaporation thermometer
indicates higher than the green zone, refer to “Chapter5 Troubleshooting.”
•After a while from the start of flowing the compressed air, drain will be discharged from the drain tube
automatically.
•Keep the condition of continuous run to use.
3- 1