Yamato Scientific WG221S User Manual

Demineralizers

Still, water, models

WG221

WG221S

First Edition

●

Thank you very much for buying Yamato Scientific AUTO
STILL series WG221/221S model.

●

For proper use of this unit, please read the instruction
manual and warranty thoroughly before operation. Keep
both for any future references.

Warning:

signs in this instruction manual prior to use.

Read and apprehend the important warning

Yamato Scientific CO.,LTD

Contents

For Safety Use................................................................................................................................................1

Explanation of Graphic Indication...............................................................................................1

Table of Symbol Mark..................................................................................................................2

Caution for Safety........................................................................................................................3

Table of Dangerous Element.......................................................................................................5

Safety Precaution ..........................................................................................................................................6

Installation and Preparation for Use............................................................................................6

Caution for Use............................................................................................................................................16

Identification of Parts..................................................................................................................................17

Body...........................................................................................................................................17

Piping Diagram..........................................................................................................................18

Operation System......................................................................................................................19

Operation Panel.........................................................................................................................22

Emergent Troubleshooting ........................................................................................................................27

Run Menu .....................................................................................................................................................28

Preparation and Check before Use...........................................................................................28

Run Menu ..................................................................................................................................29

Repeated Collection of Pure Water ..........................................................................................30

Collection of The Fixed Volume of Ion Exchanged Water........................................................31

Collection of The Fixed Volume of Distilled Water(WG221S)..................................................32

Indication of Water Quality........................................................................................................33

Display of Total Flow/Resetting.................................................................................................35

Safety Devices and Error Codes................................................................................................................36

Displays and Details of Error Code...........................................................................................36

Trouble Displays other than Error Codes/Details .....................................................................37

Troubleshooting.........................................................................................................................38

Maintenance.................................................................................................................................................39

Check and maintenance ...........................................................................................................39

Exchange of Pre-Treatment Cartridge......................................................................................39

Exchange of Ion Exchange Resin Cartridge.............................................................................39

Cleaning Still..............................................................................................................................40

Exchange Heaters.....................................................................................................................44

Clean Water Supply Hose Filter................................................................................................45

Exchange Hoses .......................................................................................................................45

When you do not use the unit for a long time...........................................................................46

After-sales Service and Warranty..............................................................................................................47

Specifications ..............................................................................................................................................48

Wiring Diagram ............................................................................................................................................49

WG221/221S.............................................................................................................................49

For Safety Use

Explanation of Graphic Indication

This instruction manual and our products apply various graphic indications for safety use. Ignoring these
indicators or improper handling of the unit can cause such situations as indicated below. Please read and
apprehend the following contents.

Warning

Caution

(1) Serious injuries mean any injuries , electric shocks, bone fractures and poisoning causing
after effects or requiring hospitalization or long outpatient t r eat ment
(2) Injuries mean any injuries and electric shocks not requiring hospitalization or long outpatient
treatment.
(3) Damages on property mean any damages on facilities, machiner y, buildings, etc.

Warning indicates possibility of serious injuries (1) or death.

Caution indicates possibility of injuries (2) on person or damages on property ( 3).

Meaning of graphic indications

It shows conducts to be surely done.

It shows warnings or cautions.

It shows prohibited conducts.

‑1‑

Table of Symbol Mark

Warning

For Safety Use

General Warning

Caution

General Caution

Water only

Prohibition

Warning of High
Potential voltage

Caution of electric
shock

Caution of deadly

poison

Warning of High
Potential voltage

Caution of scald

Warning of drive

section

Caution of

water boiling

low-

Warning of

explosion

Caution of water

leak

General Prohibition Prohibition of fire

Compulsion

General

Compulsion

Ground the unit

Prohibition of
disassembling

Install on level

area

Prohibition of

touch

Pull electric power

plug

Fixed time check

or maintenance

‑2‑

Caution for Safety

Warning

Do not use this unit in flammable or explosive gas environments.

This unit is not explosive proof. Never use this unit in flammable or explosive environments to
prevent fire or explosion.
See Page5 for dangerous element → Table of Dangerous Element

Never fail to ground the unit.

Connect with the grounded outlet. If you do not have grounded outlet, use the adapter for
grounding that is non-standard accessories, and then be sure to ground the lead.

Do not use this unit if malfunction occurs.

If smoke or any strange odor should disburse from the unit, switch off power to prevent fire or
electric shock.

Do not bundle the power cable during use.

Overheat or fire can occur if the power code is bundled in use of the unit.

For Safety Use

Do not damage the power code.

Forcibly bending, pulling or wrenching damages the power code, and can cause a fire or electric
shock.

Do not disassemble or remodel this unit.

Disassembling this unit can cause a fire, electric shock or other crisis. Never disassemble or
remodel this unit.

Do not touch hot area.

Pay attention not to get scalded. Some areas of the boiler are hot during or after operat ion. Make
sure if the boiler is cool enough before you start maintenance of the heater or other devices.

Fasten the tap when you do not use the unit

When you do not use the unit (in the nighttime or holidays) , certainly fasten the tap to prevent
the accident of water leak .

‑3‑

Caution for Safety

Caution

If it begins to thunder.

If it begins to thunder, switch the power off. Neglecting this can result in fire or electric shock.

Be careful for using the cleanser (Organosol).

The main ingredients of the cleanser (organosol) is sulfamic acid and the solution is about
PH1. Wear protective gloves, mask and glasses to handle the cleanser. Wash immediately by
pure water the cleanser splashing on body.

For Safety Use

‑4‑

Table of Dangerous Element

Nitroglycol, Nitroglycerin, Nitrocellulose, and other explosive nitric
esters.

Trinitrobenzene, Trinitrotoluene, Picric acid, and other explosive nitro
compounds.
Peracetic acid, Methyl ethyl ketone peroxide, Benzoyl peroxide, and
other organic peroxides.
Sodium azide, and other metallic azides
Metallic lithium, Metallic potassium, Metallic sodium, Yellow
phosphorus, Phosphorus sulfide, Red phosphorus, Celluloid, Calcium
carbide, Lime phosphate, Magnesium powder, Aluminum powder,
and other combustible metal powders and sodium dithionite
(hydrosulfite).
Potassium chlorate, Sodium chlorate, Ammonium chlorate, and
other chlorates.
Potassium perchlorate, Sodium perchlorate, Ammonia perchlorate,
and other perchlorates.
Potassium peroxide, Sodium peroxide, Barium peroxide, and other
inorganic peroxides.

Potassium nitrate, Sodium nitrate, Ammonia nitrate, and other
nitrates.

Explosive

Explosive

Substance

Combustible

Substance

Oxidant

For Safety Use

Flammable

Ignitable

Substance

Combustible

Gas

Sodium chlorite and other chlorites.

Calcium hypochlorite and other hypochlorites.
Ethyl ether, Gasoline, Acetaldehyde, Propylene Oxide, Carbon

disulfide, and other flammable substances with a flash point below
minus 30ºC.
Normal hexane, Ethylene oxide, Acetone, Benzene, Methyl ethyl
ketone, and other flamm able substances with a flash point between
minus 30ºC and 0
Methanol, Ethanol, Xylene, Pentyl acetate (amyl acetate), and other
flammable substance with a flash point between 0ºC and 30ºC.
Kerosene, Light oil, Turpentine oil, Isoamyl alcohol, Acetic acid, and
other flammable substances with a flash point between 30ºC and
65ºC
Hydrogen, Acetylene, Ethylene, Methane, Ethane, Propane, Butane
and other flammable gas at 15℃ degree and under 1 atmosphere.

o

C.

‑5‑

Installation and Preparation for Use

Warning

Do not use this unit in flammable or explosive gas environments.

●

This unit is not explosion proof. Never use this unit in flammable or explosive gas

environments. Electric arc occurs when you switch the unit “ON” and “OFF”, and can cause a
fire or explosion.

●

See Page 5 (Table of dangerous element) about flammable or explosive gas.

Safety Precaution



Select carefully the space to install the unit.

●

Do not install this unit in any of the following environments.

・

In inflammable or corrosive gas environments

・

In temperature beyond 35

・

In severe change in temperature

・

In very humid locations[

・

Under direct sun

・

In frequently vibrating areas

Provide ample space surrounding the unit as indicated below.
Install the unit in the place with t he sink facilities if you can.

℃

‑6‑

Installation and Preparation for Use

Warning

Do not remodel this unit.

●

Never disjoint this unit to avoid electric shock.

●

There are some high-pressure areas inside the unit. Ask your seller or Yamato Scientific’s

Technical Service Department for internal adjustment or repair.

●

You must follow this instruction manual for your daily check or maintenance. Never remodel

the unit by yourself to prevent any troubles.

Safety Precaution

Install this unit on level areas.

●

If you do not, unexpected trouble can occur.

‑7‑

Safety Precaution

Installation and Preparation for Use

Warning

Ground the unit.

●

If you do not ground the unit, the earth leakage circuit breaker would not work in case of
electric leakage. Be sure to connect the ground lead to prevent electric shock.

●

Ground the ground lead to the ground wire or terminal of the power source. Contact an
electrician if you have no equipment for grounding.

●

Never connect with gas or water pipe.

Be

●

sure to ground the lead wire when you use the adapter of non-standard accessories for

grounding.

Use exclusively the outlet.

●

Use an outlet with adequate capacity(more than 15 A).

●

If you connect to those without enough capacity, you would not take enough distilled water or

control properly the unit due to decrease of voltage from the power source. Connect the
power code to the sufficient power source.

Necessary capacity： AC100V single-phase 15A

Precaution for connecting the power cord.

●

Check certainly that the circuit breaker of power source is “off “ and connect the power cord

for this unit. Power plug of this unit is three core cable. So the plug has grounding line. If you
do not have adaptable outlet (See Page2), Use the adapter for grounding that is non­standard accessories. If you use it, be sure to ground the lead wire.

Precaution for proper use of the power cord

●

Do not bundle the power cord during operation, or overheat or fire can occur.

●

Do not process, or bend, wrench or pull forcibly the cord. Such conduct can cause a fire or

electric shock.

●

Do not damage the cord, by placing a desk or chair on it or placing it between objects. Such

conducts can result in fire or electric shock.

●

Do not place the cord near any stoves or heaters, or the cable coating can melt causing a fire

or electric shock.

●

If the power cord is damaged (core exposure or disconnection), turn immediately the circuit

breaker and the power supply off, and request the seller to change the power cord.
Neglecting this procedure can cause a fire or electric shock.

●

Connect the cord to an exclusive outlet.

‑8‑

Installation and Preparation for Use

Warning

Connect securely the water supply hose.

●

If you do not connect the joint securely, the water-supply hose or connector would come off,

causing water leak or spouting.

●

Use the connector and water-supply hose out of accessories for this unit. Install the unit on

the level and stable place near a tap and drainage.

Connect securely the water-supply hose in the following procedure.

Connect to a tap.

(1) Slide the joint sleeve of the socket ③ to the direction the arrow shows. Then you can

separate the connector and the hose.
(2) Loosen the plug ② from the ring ①.
(3) Fasten 4 screws ⑤ in the same way while pushing the ring ① lightly and evenly so that the

packing ⑥ touches evenly the tap.
(4) Turn right and fasten securely the plug ②.Then the packing ⑥ seals the tap and connector.
(5) Slide the sleeve to the direction the allow shows and insert the socket ③ securely into the

plug ②. Make sure the sleeve goes back to the original position when you loose your hold.

Then you can finish the connection.

Safety Precautions

‑9‑

Installation and Preparation for Use

Warning

Connection to the unit

(1) Remove the rubber cap from the plug ⑧.
(2) Slide the sleeve to the direction the arrow

shows, and insert securely the socket

into the plug ⑧.

Make sure the sleeve returns to the original

position when you loose your hold. Then,

you can finish the connection.

The socket has a built-in valve which would

not open for water run until the plug is

connected.

Connect the water-supply hose to a tap with drainage system.

●

Connect the hose to a tap with drainage
system. If you connect the water-supply
hose to a tap without drainage system,
damage on the hose could result in overflow
of water.

Safety Precautions

⑨

‑10‑

Installation and Preparation for Use

Caution

If drainage facility is away from the tap, use the Water Supply Unit, a non­standard accessory.

●

The “Water Supply Unit” includes all items
from the sleeve to the joint. Refer to the
instruction manual for the “Water Supply
Unit” about connection to the faucet and for
more information.

●

The “Water Supply Unit” has the structure to
keep tight connection to the pipe compared
to a normal hose set even when the water
pressure changes.

Safety Precautions

Joint

Joint

Keep the following pressure of water service.

●

Keep water pressure within 0.5 to 5×100kPa (0.5 to 5kgf/cm2) even for use at night.

●

Keep the same water pressure even when you use the non-standard accessory “Water Supply
Unit”,

‑11‑

Installation and Preparation for Use

Warning

Connect securely the drainage hose.

●

Connect securely the drainage hose. If the hose comes off due to incomplete connection,
water would leak inside the unit and might cause machine trouble.

(1) Take the drainage hose and the hose band out of accessories for the unit.

(2) Make sure the circuit breaker is off.

(3) Take out the rubber stopper from the drain .

(4) Pass the hose band over the hose. Then, insert the hose into the drain and fasten the

hose band.

Safety Precautions

Be careful to arrange the drainage hose.

●

Do not bend the hose nor make any convex part.

●

Arrange the hose lower than the drain of the unit. And also avoid the connection which make
water accumulate in the drainage hose or drain exit and become resistance for drain.

●

Lead the end of the drain hose to drainage capable of about 2

Drainage with larger capacity is required when boiler water is drained.

/min. of cooling water drained.

‑12‑

Installation and Preparation for Use

Warning

Check the temperature of drained cooling water.

●

The drained water sometimes exceeds 60℃ especially in summer. Do not touch the water
carelessly, or you can get scalded. Drain the water away from your work areas.

●

Drain hot water away from chloroethylene pipe, if used, in the drainage facility, or the drained
water can deteriorate the pipe. You must connect the drain trap, a non-standard accessory for
the unit, to the chloroethylene pipe in case the pipe temperature does not get lower than 60℃.
Use the drain trap of the non-standard accessory even under 60℃ when you do not use the
above-said pipe and joint.

Safety Precautions

If the drain pipe of the drainage facility does not get lower than 60

●

Connect the drain trap, a non-standard accessory for the unit.

●

The trap keeps the drained water for a while to cool the water naturally. In addition, the trap
mixes tap water and cooled drained water. Then mixed water is drained to drainage facility
after mixed water is cooled down.

●

If you want to know about the details of the drain trap, ask your seller or Yamato Service
Department.

AUTOSTILL

AUTOSTILL

AUTOSTILLAUTOSTILL

℃℃℃℃

.

Draintrap

Draintrap

DraintrapDraintrap
(non‑standardaccessories)

(non‑standardaccessories)

(non‑standardaccessories)(non‑standardaccessories)

Carrier

Carrier

CarrierCarrier
(non‑standardaccessories)

(non‑standardaccessories)

(non‑standardaccessories)(non‑standardaccessories)

‑13‑

Installation and Preparation for Use

Warning

Connect securely the Ion-exchange resin cartridge.

●

Connect securely the ion-exchange resin cartridge(CPC-N) as follows.

●

If you do not connect securely, the connected hose would come off, causing water leak.

(1) Make sure the earth leakage circuit breaker or the unit is switched off, and the tap is being

fastened.
(2) Use the ion-exchange resin cartridge out of accessories for the unit.
(3) Put the ion-exchange resin cartridge on the receive table.(See Fig.01)
(4) Fix the ion-exchange resin cartridge with the band of the receive table.(See Fig.02)

Safety Precautions

(5) Remove the rubber cap from the entrance and exit of the ion-exchange resin cartridge.
(6) Insert the coupler which marked “IN” into the entrance(left side) of the ion-exchange resin

cartridge as far as making sounds like “katchi”.
(7) Insert the coupler which marked “OUT” into the exit(right side) of the ion-exchange resin

cartridge as far as making sounds like “katchi”.

Sometimes the coupler is not easy to be inserted. If you insert the coupler hard, you may
break the insertion. Be careful not to insert the coupler curved.

(8) When you want to remove the coupler from the ion-exchange resin cartridge, it makes

easy to remove the coupler that y ou pull the coupler forward wit h pushing the black part of

the coupler deeply .

‑14‑

Installation and Preparation for Use

Warning

Connect securely the pre-treatment cartridge.

●

Connect securely the inside hose as follows.

●

If you do not connect securely, the connected hose would come off, causing water leak.

(1) Make sure the earth leakage circuit breaker or the unit is switched off, and the tap is being

fastened.
(2) Use the pre-treatment cartridge ① out of accessories for the unit.
(3) Take off the caps on the IN and OUT of the cartridge ①.
(4) Open the unit front door. Then you can find one connecting hose with the IN coupler

and other with the OUT. Connect the respective hoses to I N and OUT of the cartridge ①.
(5) To connect each hose, slide the blue part ③ of the coupler back to the hose side, and fit

the end of the coupler to the respective end of the cartridge. Then release the blue part

③

.(See Fig.03)

(6) After you finish the connection, set the pre-treatment cartridge at the left side before the

distilled water tank, as the picture shows. Be careful not to bend the hose. (See Fig. 04)







Safety Precautions

②

②

①

Fig.03

Fig.03

Fig.03Fig.03

Fig.04

Fig.04

Fig.04Fig.04

‑15‑

Caution for Use

Warning

No use at occurrence of abnormality/troubleshooting

●

If smoke or any strange odor should disburse from this unit for any reasons, turn off
immediately unit source breakers, extract the plug, and request the seller or Yamato Scientific
to check the unit. Neglecting this procedure can result in fire or electric shock. Never try
repairing the unit yourself. It is too dangerous.

If it begins thundering.

●

If it begins thundering, turn the circuit breaker off immediately.

●

Neglecting this procedure can result in circuit disorder, fire or electric shock due to

thunderbolts.

When you dispose of the unit.

●

Dispose of the unit as large-sized discarded article.

●

Do not leave the unit in child playground etc.

Be careful to use the cleanser(Organosol).

●

Keep the cleanser in an airtight container, and avoid preservation in hot and humid areas.

●

The main ingredient of the cleanser “Organosol 10” is sulfamic acid (PH1 acid solution).

●

Wear protective gloves, mask and glasses to handle the cleanser.

●

Wash by pure water the cleanser splashing on body.

●

Neutralize cleanser after use with sodium hydroxide.

●

Check by a PH indicator if cleanser is neutralized irrigation channel or fields.

●

Do not use the vacant cleanser container as a drink bottle.

●

Do not drain the cleanser directly into an agricultural irrigation channel or fields. The cleanser
can kill rice plants and other farm products.

When you do not use the unit in the nighttime or holidays

●

Turn the circuit breaker off.

Be sure to

●

The change of water pressure may cause some accident like water leakage.

●

Fasten the tap.

‑16‑

Body

This drawing identifies parts.

Identification of Parts

valve

outlet

outlet

‑17‑

Piping Diagram

Identification of Parts

Decompressor
Pressure switch
Solenoid valve for cooling water
Solenoid valve for raw water

Pre-treatment cartridge

Ion-exchange resin cartridge
Float receptacle
Float switch to detect boiler overheat
Float switch to control boiler water level

Float switch to control the heater
Solenoid valve to drain boiler water

Valve to drain boiler water
Boiler

Heater
Condenser

Electrode for ion-exchanged water
Electrode for distilled water examiner
Solenoid valve for boiler water supply
Solenoid valve to drain the initial distilled water
Solenoid valve to take ion-exchanged water
Solenoid valve to take distilled water
Ion-exchanged water flow sensor

Distilled water flow sensor

(WG221S only)

Ion-exchanged water outlet
Distilled water outlet

Distilled water tank
Float switch to check the water level
Air filter
Pump to take distilled water
Drain for distilled water tank

‑18‑

Identification of Parts

Operation System

This drawing identifies WG221S operation system by the process.
(There are some different parts used for WG221.)

(1) Drain boiler water

●

Turn the circuit breaker on and push the power switch ,then after 15sec.

solenoid valve to drain

boiler water opens for about 40sec. and at the same time
for about 30sec

(2)Supply and distillation of boiler water

.

solenoid valve for cooling water opens



After finished boiler water drainage,
water opens at the same time ,and then

When

sufficient,

Following water supply, when

closing

float switch (to control the boiler water level) in the float receptacle finds water level

heater becomes on to start distillation.

solenoid valve for raw water and

solenoid valve for raw water and

water is supplied into boiler.

float switch controls water supply into the boiler by opening and

solenoid valve for boiler water

solenoid valve for boiler

.

‑19‑

Operation System

●

(3)Flow of cooling water

Identification of Parts

●

In distillation of boiler water ,cooling water flows and drains from the
water solenoid valve to

exchanged water , distillation stops and water flow and dr ain stops automatically.

(4)Collection of distilled water

condenser. When distilled water tank is full of water or taking ion-

decompressor, cooling

For about 10mim. from the beginning of distillation of boiler water , distilled water condensed in

condenser is stored into distilled water tank through electrode for distilled water, after
initial water is drained by
water full and stops distillation when the highest

Distilled water stored is taken out by

take distilled water

,

distilled water flow sensor (WG221S only)

solenoid valve (to drain the initial distilled water)

pump(to take distilled water) through

float switch inside the tank is activated.

and

opened. The unit judges

solenoid valve to

distilled water outlet

.

‑20‑

Operation System

(5)Collection of ion-exchanged water

●

Ion-exchanged water is taken out by through

pre-treatment cartridge
exchanged water
and

,

Ion-exchanged water outlet

,

solenoid valve to take ion-exchanged water

Identification of Parts

decompressor,

Ion-exchange resin cartridge(CPC-N)

,

.

solenoid valve for raw water

Ion-exchanged water flow sensor

,

,

electrode for ion-

‑21‑

Operation Panel

Identification of Parts

20

①

Power switch

②

Operation indication lamp

③

Select switch

④

Lamp to identify the measured electrode

⑤

Unit of water quality measurement

⑥

Indicator (1)

⑦

Trouble indication lamp

⑧

Distilled water level indicator

⑨

Switch to change methods to take pure water

Display lamp to identify the method to collect water

⑩

⑪

Switch to take ion-exchanged water

Lamp to indicate collection of ion-exchanged water

⑫
⑬

Switch to take distilled water

⑭

Lamp to indicate collection of distilled water

⑮

Unit of amount to collect

⑯

Indicator (2)

⑰

Function key

⑱

Enter key

⑲

Up key

⑳

Down key

‑22‑

Operation Panel

①

Power Switch…

This is the switch for power supply. The STAND-BY lamp is lit when the power cable is
connected and the earth leakage circuit breaker is on. W hen you push the switch in this
situation, power becomes “ON”. If you push the switch again, then power becomes
“OFF”.

②

Operation Display Lamp…

Stand-By:
(1) The yellow lamp is lit when the power source is “ON”. But the power switch is “OFF”.
(2) The yellow lamp blinks in case of suspension of water supply or decrease of raw

DISTILLATION:
The green light is lit during distillation.
DRAINAGE:
The green light is lit during automatic drainage of boiler water.

③

Select Switch…

This switch is to select either electrode for water quality check. Each one push
automatically and alternatively select either sensor for ion-exchanged water or the other
for distilled water. Then the indicator (1) shows either electrical conductivity or resistivity
of the selected electrode.

④

Lamps to identify the electrode to measure…

Either lamp is lit to show the electrode selected by the SELECT switch.

ION EXCHANGED WATER:
Water quality at the exit of the ion-exchange resin cartridge
DISTILLED WATER:

×１０－４Ｓ／ｍ

４　

×１０

Ω・ｍ

Quality of distilled water at the exit of the condenser

⑤

Unit to display water quality…

Either unit of the value the indicator (1) shows is identified.

(The resistivity is shown by the integral number within 1 to 18.

Identification of Parts

water pressure. In addition, the indicator (1) shows

: represents the electrical conductivity (=µS/cm)
: represents the resistivity (=MΩ･cm)

.

‑23‑

Operation Panel

⑥

Indicator (1) …

The displayed (selected) water quality is the converted value at 25℃. Another water
quality not indicated (selected) is always being checked. If either water deteriorates its
quality to the specific value, the indicator repeatedly indicates the sensor No. The
indicator also gives the respective error codes in case of stop of raw-water supply,
decrease of water pressure or any other trouble in the device.

<The standard values to determine det er ioration of water quality>

Identification of Parts

Ion-exchanged water:
Distilled water:

<Example of indication of water deter i or at i on>

Incase you select the ion-exchanged water by SELECT key: When quality of ion-exchanged
water is 0.10×10

Electric conductivity of the selected
electrode C3 (ion-exchanged water)

<Stop of raw-water supply or decrease of water pressure>

comes up and the STAND-BY, an operation display lamp, blinks.

<In trouble>

The display identifies the trouble.
Refer to the Trouble Shooting Guide (P.27) for more information.

-4

S/m while distilled water is 10×10-4S/m or more. (deterioration of water)

or more

or more

Electric conductivity of the electrode C1
(deteriorated distilled water)

‑24‑

Identification of Parts

Operation panel

⑦

Trouble Indication lamp…

The lamp blinks when detects abnormality in operation or trouble of the unit. The
indicator (1) identifies such a situation.

⑧

Distilled Water Level indicator…

The indication lamps show 5 levels of the distilled water in the tank. When the water
storage is less than 2
distilled water for preventing the empty pump operation. When the lowest lamp start
blinking, you can take distilled water again.

<No water> <Full water>

, the lowest yellow lamp is lit. In this case, you can not take

Operational range of the pump to take water

⑨

Switch to change methods to collect pure water…

This is the switch to select taking water repeatedly or by the fixed volume. To select
taking the fixed amount, push once. If you push again, you can take water repeatedly.

⑩

Lamp to identify the water-collection method…

This lamp is lit only while you select t he repeat ed collection. On the other hand, the lamp
goes out when you select collection of the fixed volume.

⑪

Switch to collect ion-exchanged water…

1) In case of repeated collection
Switch ON (one push) to collect ion-exchanged water.
Switch OFF (one more push) to stop collection.

2) In case of collecting the fixed volume
Switch ON (one push) to start collection of ion-exchanged water. The unit stops
automatically its operation when the collection reaches the set amount. If you push
the switch during collection, the unit would stop operation even before the collection
reaches the set amount.

⑫

Lamp to indicate collection of ion-exchanged water…

The green lamp is lit during collection of ion-exchanged water.

⑬

Switch to take distilled water…

1) In case of repeated collection
Switch ON (one push) to collect distilled wat er.
Switch OFF (one more push) to stop collection.

2) In case of collecting the fixed volume
Switch ON (one push) to start collection of distilled water. The unit stops its operation
automatically when the collection reaches the set amount. If you push the switch
during collection, the operation would stop even before the collection reaches the set
amount.
WG221 can change to collection mode of the fixed volume by using switch (to change
methods to take pure water). But in collection of the fixed volume mode, switch to take
distilled water does not work.

‑25‑

Operation panel

⑭

Lamp to indicate collection of distilled water…

The green lamp is lit during collection of distilled water.

⑮

Unit of volume to collect…

When the indicator (2) shows the volume to take, the unit of (
case the indicator shows the total flow, the unit of ×10

⑯

Indicator (2)…

The indicator shows the following.

1) In case of repeated collection
The indicator shows

2) In case of collecting the fixed amount

It shows the set volume. The initially set value is 0.1
decreasing as water is being collected. At the completion of collection, the set value
comes up again.

3) Identification of function

The indicator also identifies the function selected.
a)
b) : Mode to change the unit for water quality check

4) Display of total flow

The total water flow shows the aggr egate volume of distilled water collected.

⑰

Function key…

Push the select functions. The indicator (2) identifies the selected function.

Identification of Parts

) is displayed. In other

is displayed.

.

. The display set value is

: Indication of the total flow

⑱

Enter key…

A push on the key completes your selection of function. In other word, you need to push

this key to escape from the function-selecting mode.

⑲

Up key…

Push the key to set the following

1) At collection of the set volume

Set the volume to collect. Each one push increases the set value in the indicator (2).
The set value goes up successively when y ou keep pushing the key.

2) At the selection of a function

You can select the following functions by pushing this key.
a) ON or OFF to display the total flow of ion-exchanged water.
b) Change of units to indicate water quality.

⑳

Down key…

Push this key to set the following

1) At collection of the set volume

Set the volume to collect. Each one push decreases the set value in the indicator (2).
The set value goes down successively when you keep pushing the key.

2) At the selection of a function

You can select the following functions by pushing this key.
a) ON or OFF to display the total flow of ion-exchanged water.
b) Change of the unit to indicate water quality.

‑26‑

Emergent Troubleshooting

Identification of “TROUBLE” / Identification of causes

This unit has self-diagnosis function. If any operational abnormalities or machine troubles should occur,
the alarm lamp in operation panel blinks. f this occurs, immediately disconnect the breaker and turn the
tap off.
See page 36 “Display and Details of Error Code” ,if you need to know about the details of identification of
“TROUBLE”.

The TROUBLE lamp also blinks.

Water leakage

The TROUBLE lamp also blinks.

Abnormal boiler water level

The TROUBLE lamp also blinks.

Heater overheating

The TROUBLE lamp also blinks.

Defect of the float switch to

control the boiler water level.

The TROUBLE lamp also blinks.

Defect of the float switch for the

distilled water tank.

The TROUBLE lamp also blinks.

Defect in the electric circuit

‑27‑

Preparation and Check before Use

Warning

1. Check water supply.

z

Check if the water-supply hose is securely connect ed.

z

Then, open the tap.

z

Make sure if no water leaks from the joint of the hose.

2. Check drain.

z

Check if the drain hose is securely connected.

z

Make sure if the hose is not bent or if there are no conv ex part s.

z

If the hose is bent, not only the unit does not run correctly, but also it may cause the accident of

water leak. Sometimes check if the drain is done correctly.

3. Check the power source.

z

Make sure that the pow er cable is connect ed t o an appropriat e out let .

4. Just after run

z

After turning on electricity initially or drain from distilled water tank, It takes much time to start

collecting of distilled water because of the air in pump or pipe.

z

Just after exchanging pre-treatment cartridge or Ion-exchange resin cartridge , It also takes much

time to start collecting of distilled water. And when you change the some of cartridge, drain about 5
liters to remove t he initial impurities.

Run Menu

‑28‑

Run Menu

Run menu as follows when you are ready for operation.

1. Power-on

1

Switch ON the earth leakage circuit breaker.

2 Push the POWER switch.
Operation panel display in about 15 seconds after you

push the power switch until the dist illat ion st ar ts.

Run Menu

●

The indicator (1) blinks

●

The STAND-BY, an operational indication lamp, goes

out.
(However, the indication (1) does not show

you push the power key some time after switching on
the earth leakage circuit breaker.)

2. Drain boiler water after you push the power switch.

Display of operation panel…

●

Operation indication lamp lit with the green light during
drainage of boiler water . (about 30 sec.)

(However, drainage of boiler does not work only if you
push the power key after switching on the earth
leakage circuit breaker.)

.

if

3. 15 minutes after you push the power switch.

Display of operation panel…

●

The indicator (1) shows electric conductivity of ion-

exchanged water. (Ex.

●

The ION EXCHANGED WATER lamp is lit to identify
the electrode being measured.

●

Among distilled water level indicators, the yellow lamp
is lit to show no water storage.

●

Water is supplied to the specific level. At t he completion
of initial water supply, distillation starts. Then, the green
DISTILLATION lamp is lit among operation indication
lamps.

)

‑29‑

Repeated collection of ion-exchanged water

Push once the ION EXCHANGED WATER switch while
the CON. lamp, identifying the water collection method, is
lit.

Among the operation panel indicators;

●

The lamp indicating collection of ion-exchanged water

blinks
If you push again the ION EXCHANGED WATER switch;
Among the operation panel indicators;

●

The lamp indicating collection of ion-exchanged water

goes out.

Run Menu

Repeated Collection of Pure Water

Repeated collection of distilled water

Push once the DISTILLED WATER switch while the
STAND BY lamp, identifying the method of water
collection, is lit but the yellow “no water” lamp, among
indicators to show the volume of distilled water, is not lit.

Among the operation panel indicators;

●

The lamp, indicating collection of distilled water, is lit.
If you push again the DISTILLED WATER switch;
Among the operation panel indicators;

●

The lamp indicating collection of distilled water goes
out.

(If, among indicators to show the volume of distilled water
stored, the yellow “no water” lamp gets lit during collect ion
of water, the unit automatically stops taking water and the
lamp showing collection of distilled water goes out.)

‑30‑

Run Menu

Collection of The Fixed Volume of Ion Exchanged Water

1. Push the switch to change the method to collect water. Then the CON. lamp goes out.

Among the operation panel indicators;

●

The CON. lamp, a collection method indicator, goes

out.

●

The indicator (2) shows the initial value of

a unit of collection, blinks.

. ( ),

2. Push either

▲▲▲▲

or

key to set the volume to take.

▼▼▼▼

Among the operation panel indicators;

●

The indicator (2) changes the value according to your

key touch.
(You can set up to 99.9

3. Push the ION EXCHANGED WATER switch.
Ion exchanged water comes out from the outlet

Among the operation panel displays;

●

The lamp indicating collection of ion exchange water is

lit.

●

The indicator (2) starts decreasing the displayed value.

.)

4. When the indicator (2) decreases the displayed value to and the remaining
water flow of 0.1

is completed;

Among the operation panel indicators;

●

The lamp indicating the collection of ion exchanged
water goes out.

●

The indicator (2) returns to the set value.

(The actual amount of collected water may increase or
decrease between maximum±10％)

‑31‑

Run Menu

Collection of The Fixed Volume of Distilled Water(WG221S)

1. Push the switch to change the collection method and put out the CON. lamp.

Among the operation panel indicators;

●

The CON. lamp, the collection method indicator, goes
out.

●

The indicator (2) shows the initial value of

At the same time, (

), a unit of water collection, is lit.

.

2. Push

▲▲▲▲

or

key to set the volume to take.

▼▼▼▼

Among the operation panel indicators;

●

The indicator (2) changes the value according to each
your key operation.

(You can set up to 99.9

3. Push the DISTILLED WATER switch.

Distilled water comes out from the outlet.

Among the operation panel indicators;

●

The lamp indicating collection of distilled water is lit.

●

The indicator (2) starts decreasing the displayed value.

(If the yellow “no water” lamp, one of indicators to show t he
level of distilled water stored, is lit during water collection,
the unit automatically stops collection and the lamp
indicating collection of distilled water goes out. In addition,
the indicator (2) returns to the set value.)

.)

4. When the indicator (2) decreases the displayed value down to and the
remaining water flow of 0.1 is completed;

Among the operation panel indicators;

●

The lamp indicating collection of distilled water goes out.

●

The indicator (2) returns to the set value.
(The actual amount of collected water may increase or
decrease between maximum±10％)

‑32‑

Run Menu

Indication of Water Quality

Selection of either electrode for ion-exchanged or distilled water

Each one push on SELECT switch selects alternatively the electrode of either water
quality examiner to be measured.

Among the operation panel indicators;

●

Either ION EXCHANGED WATER and DISTILLED
WATER is lit alternatively by each push to identify one
electrode measured.

(The electric conductivity is shown by t he unit of
“

Change of the unit to indicate water quality.

1. Each one push on the FUNCTION key changes displays of indicator (2).

Operation panel display

●

The indicator (2) changes its displays as follows.

” when the power switch is “ON”.)

Repeated collection
Mode to display the total water flow

Mode to change the unit to indicate water quality

Select the display of .

2. Push either

▲▲▲▲

or

key once.

▼▼▼▼

Among the operation panel indicators;

●

The unit for water quality indication changes. Then the

unit of resistivity “

●

The indicator (1) also indicates the resistivity. The

integral number shows from 1 to 18 within the range of

1.0 to 18.2 (

” is shown.

).

3. Push the ENTER key, Then, you can fix the unit and get out from the function mode.

Among the operation panel indicators;

●

The indicator (2) shows

（

The unit to indicate water quality returns to the electric

conductivity when you switch the POWER key OFF and
ON again.

）

.

‑33‑

Run Menu

Indication of Water Quality

Measurement of Electric conductivity

The water quality examiner in the operation panel shows the electric conductivity at the exit of ion­exchange resin cartridge and of distilled water condenser. Use the indication as the standard for
exchanging ion-exchange resin cartridge. When you read the indication, be sure that the part of electrode
is in the full of water; that is in the flowing of Ion-exchanged water. Besides that the part of electrode is not
in the water, the indication is not correct for the influence of bubbles in the following case.

1. At the beginni ng of r unni ng or dur ing the unit stopped

2. Just after exchanging pre-treatment cartridge or ion-exchange resin cartridge

3. Just after the beginning of distillation of water

Electric conductivity

●

Electric conductivity shows how much electricity can pass. As water contains more electrolyte or
impurity, more electricity can pass through and the value of conductivity gets larger. On the contrary, the
value gets smaller as water contains less electrolyte.

●That means water is more pure as the conductivity is smaller.
However, the value of conductivity shows containment of electrolyte only but does not indicate any
containment of non-electrolyte such as organic, colloid, dissolved gas and microorganism. Therefore,
conductivity is just one of indicators to shows water purit y.

●

Resistivity is to indicate the same property as the electric conductivity shows. Resistivity is reciprocal to
electric conductivity. The larger resistivity indicat es higher purit y.

●

To calculate the resistivity from the elect r ic conduct ivity;

R

= Resistivity ρ=Electric conductivity

R［Ω･m］

R［Ω･m］R［Ω･m］

Pure water theoretically has the following value.

R

=18.3×10
(The resistivity is displayed by the integral number within 18 to 1×10
number indication.)

ρ=0.055×10

4

Ω･

-4

=

ρ

    SSSSm］

m (18.3MΩ･cm) 25

S/m (0.055・/cm) 25

[/

m］

m］m］

or

℃

℃

R［×10

R［×10 Ω･m］

R［×10R［×10

R［Ω･m］

1111

４４４４

Ω･m］

Ω･m］Ω･m］

=

    ×10

ρ

4

Ω･

1111

−４

−４

−４−４

×10 SSSSm］

[/

×10×10

m. Note there is no decimal

m］

m］m］

Quality of ion-exchanged/distilled water

●

Ion-exchanged water and distilled water have the following properties respectively. Select either water
according to your requirement.

It is ideal to use distilled water just after you collect. If you do not use the water soon, drain the distilled
water tank. When you keep distilled water in the tank for a while, drain the tank and store new distilled
water in the tank to use.

(1) Ion-exchanged water

Since almost all electrolyte are removed from ion-exchanged water, you can get water with the
lowest electric conductivity. But it is impossible to remove non-electrolytic impurity. Purity is a little
low with a new resin or at the re-start of flow after operation stops.

(2) Distilled water

The mode can remove averagely electrolyte and non-electrolyte except ammonia and other
substances with low boiling point.
However, water absorbs carbonic acid gas from air and creates carbonic gas during its production
process (in condensation and storage).
Accordingly, water quality is worse than ion-exchanged water and becomes weak acid (pH5 to 6)
with its electric conductivity about 1 t o 2× 10

-4

S/m 25℃ (1 to 2.5・/cm).

‑34‑

Run Menu

Display of Total Flow/Resetting

Check the total flow to know the time to exchange ion-exchange resin or pre-treatment
cartridge.

1. Each one push on the FUNCTION key changes display of indicator (2).

Among operation panel indicators, the indicator (2) changes
indications as follows.

Repeated collection
Mode to display the total flow

Mode to change the unit for indicating water quality

Select and display .

2. Push either

▲▲▲▲

or

key once.

▼▼▼▼

The indicator (2) in the operation panel shows the total flow.

3. Push the ENTER key to cancel the function.

The indicator (2) in the operation panel shows .

Resetting the total flow.

Select the total flow in the indicator (2). Then, push the
same time.

and key at the

The indicator (2) shows .

‑35‑

Safety Devices and Error Codes

Displays and Details of Error Code

Safety device Indicators Indication Cause Effect on operation Measure

Detecting
leakage

Heater
overheat
protection

Detecting
trouble of
float switch

Detecting
abnormal
water level

Detecting
float switch
trouble

Indicator(1)

is lit

is lit

is lit

is lit

is lit

Water
leakage

Heater
overheat

Trouble of the
float switch
for distilled
water tank

Abnormal
water level in
the float
receptacle

Trouble of the
float switch
for float
receptacle

Heaters, solenoid valves
and any other controllers
become off.

Heaters, solenoid valves
and any other controllers
become off.

Heaters, solenoid valves
and any other controllers
become off.

Heaters, solenoid valves
and any other controllers
become off.

Heaters, solenoid valves
and any other controllers
become off.

Turn the breaker off and
check piping parts. (See
P38 for troubleshooting)

Contact the seller or
Yamato Scientific’s
Technical Service
Department.

Contact the seller or
Yamato Scientific’s
Technical Service
Department.

Check if the boiler water
drain valve is open. If this
abnormality is indicated
with the valve closed,
contact the seller or
Yamato Scientific’s
Technical Service
Department.

Contact the seller or
Yamato Scientific’s
Technical Service
Department.

Detecting
trouble of the
electric circuit

●

”TROUBLE” blinks to alarm abnormal situation while the indicator (1) shows a certain error code.

is lit

Trouble in the
electric circuit

Heaters, solenoid valves
and any other controllers
become off.

Contact the seller or
Yamato Scientific’s
Technical Service
Department.

‑36‑

Safety Devices and Error Codes

Trouble Displays other than Error Codes/Details

Safety devise Indicator indication Cause Effect on operation Troubleshooting

Detecting
abnormal
water quality

Indicator (1)

Ion-exchanged water
deteriorates lower
than the standard.
See page24 about the
standard.

Distilled water
deteriorates lower
than the standard.
(When the value
reaches 10×10
or more.)

Water quality is too
low to measure.

Disconnection of the
measured electrode
without water.

-4

S/m

The indicator
repeatedly alarms

. However,
operation continues
as usual.

The indicator
repeatedly alarms

. However,
operation continues
as usual.

The usual operation
continues. However,
the sign is
continuously shown
when you select the
electrode.

The usual operation
continues. However
the sign is
continuously shown
when you select the
electrode.

It is not machine
trouble. Change the
old ion-exchange
resin into new one.

Contact the seller or
Yamato Scientific’s
Technical Service
Department.

Indications of
and are shown
at the same time.
Follow the respective
instructions.

This situation
sometimes occurs in
operation of this
device. However, if
this indication would
not disappear for a
long time when water
flows, request
service.

Detecting
sensor
trouble

Lamp to
identify the
electrode
measured.

STAND BY

lamp is lit

Blinking

Interruption/pressure
decrease of original
water flow.
When pressure of
water service gets
lower than 50kPa
(0.5kgf/cm

Disconnection of the
thermistor for
temperature
compensation of the
measured electrode.

2

)

Distillation and
collection of ion­exchanged water
stops temporarily.

The temperature
without compensation
is shown when you
select the electrode.

Make sure if the water
pressure is normal
and the tap is open.
Distillation starts
again when the
original water
pressure is re-gained.

It is better to request
earlier service.

‑37‑

Safety Device and Error Codes

Troubleshooting

Troubleshooting when is lit to indicate water leak.

(1) Turn the earth leakage circuit breaker in the right side of the unit OFF.
(2) After the defect is repaired, to re-start the operation, wipe the water at the bottom areas of the device

and dry it, and also remove the leak detecting electrode and dry it .
(3)Set the electrode in the original position.
(4) Close the door .
(5) Turn the breaker ON, and push the POWER switch. Normal operation starts as the defect is repaired.

‑38‑

Check and maintenance

Maintenance

Time for periodical check and maintenance

condition.)

Item to check and maintain Period Note

Exchange of pre-treatment cartridge

Exchange of ion-exchange resin cartridge
Cleaning the still 3 months

Cleaning the water supply hose filter 6 months
Hose exchange 2 years Check the joint once a month.
Distilled water tank 3 months

Each 6 or 12
months

When the
indicator (1)
shows

(Check periodically the unit to use in stable

Durability:
About 5000

in Tokyo (with quality of 200×10
You need earlier exchange of the cartridge
when you use raw water with worse quality.
Durability:

About 650
200×10

You need earlier cleaning when you use raw
water with worse quality.

in case of using water service

of raw water with quality of

-4

S/m

-4

S/m)

Exchange of Pre-Treatment Cartr idge

Refer to Page 15 “Connect securely the pre-treatment cartridge” in the “Safety Precaution”.
Dispose of the old pre-treatment cartridge as nonflammable.
If you use the unit without changing the pre-treatment cartridge, the span of life of the ion-exchange resin
cartridge is made short.

Exchange of Ion Exchange Resin Cartridge

Because the keeping of the cartridge for long time makes the water quality and durability worse, prepare
the spare cartridge for the time to exchange. The standard of keeping in about four months.
Refer to Page 14 “Connect securely ion-exchange resin cartridge” in the “Safety Precaution”.
Dispose of the exchanged cartridge as nonflammable.
If you use the unit without changing the cartridge, stone attaches increasingly to the inside of the boiler
and heaters, which can decrease collection of distilled water and damage heat er s.

‑39‑

Maintenance

Cleaning Still

Removal the still

1.

Turn “OFF” the circuit breaker.

2.

Close the faucet.

3.

Make sure if the boiler cools down enough (about more than 30 min. later). Open the front door of this

unit and the valve to drain boiler water.

4.

Remove both hose connected to the ① boiler and ② condenser respectively. Twist the hose-band by

using tools, move the part of notches and you can remove the exit of distilled water and outlet/drain of
boiler. When you remove them, be careful not to damage the glasses with giving excessive power.
Remove the nut of entrance and exit of cooling water by rotating counterclockwise. Be sure not to lose
the inside packing.

5. Take off the four connecting screws by cross screwdriver, and take off the left side board.

6. By cross screwdriver , loosen the four connecting screws in right side of terminal rack that is in the upper

right of framework made by removing the left side board. Pull the heater terminal.

‑40‑

Maintenance

Cleaning Still

Removal the still

7.(1) Pull the heater terminal from the grommet.
But do not bend or pull leads from heaters beyond the necessity.
(2) Remove the two screws of band for boiler fixed by cross screwdriver, and take off the boiler

condenser.

(3) Loosen the three rolled screw of metal fittings connection, and remove the boiler condenser.

Cleaning the boiler

1. Preparing scale detergent
(1) Prepare hot water with temperature between 50 and 60℃ about 2 liters.

(2) Mix well “Organosol 10” about 200g, an accessory for this unit, and hot water prepared (1).

2. Stop the hose joint in the lower part of the boiler (outlet/drain of boiler) by rubber stopper etc.

3. Set the boiler at the stable place not to pour scale detergent from the boiler.

4. Pour the scale detergent from joint into the condenser with the heater connected.

5. Almost all scales are removed in about 4 to 5 hours. Drain the scale detergent from the boiler. If a lot of
scales in the boiler are not removed, add new scale detergent to repeat cleaning.
(1) If you finished removing the scales, take off the heaters from the boiler and wash them thoroughly by

the tap water. Wash them in the big beaker with full of water not to be wet of leads and drain.

Do not wash them by the tap water directly.

(2) If solid scales is not removed by the scale detergent, do the following treatment.

Boiler : Wipe off by brush etc.

Heater: Wipe off by soft material like chip or plastic etc.
The scales in the heater must be wiped equally and the solid scales must not be left partly. Extremely
the part only become a large heat resistance, therefore the heater may be broken.

‑41‑

Maintenance

Cleaning Still

Cleaning the condenser

1. Pour the scale detergent into the cooling pipe of the condenser .
(See page41 about the

2. If the cleanser comes out from the hose joint, stop the hose joint by silicone stopper etc. Almost all
fur is removed in about 4 or 5 hours.

3. After the scale detergent drained, wash the inside of condenser by tap water thoroughly.

About the treatment of the cleanser ( See page16 “Caution for Use”)

1. Wash the boiler and the heater a little early. The more the amount of the scales adhesion is, the more

difficult you remove it. And it may cause that the amount of taking distilled water decreases and the
heater is broken.

2. After washing, drain the cleanser from them and neutralize cleanser by the neutralizer. Check by a PH

indicator if cleanser is neutralized irrigation channel or fields. (the main ingredient of the scales
cleanser : sulfamic acid , PH of the solution : about PH1 acid)

3. Keep the cleanser in an airtight container, avoid preservation in hot and humid areas, and keep in cool

and dark areas.

4. Wear protective gloves, mask and glasses to handle the cleanser.

5. Wash by pure water the cleanser splashing on body.

6. Do not use the vacant cleanser container as a drink bottle.

7. Do not drain the cleanser directly into an agricultural irrigation channel or fields. The cleanser can kill

rice plants and other farm products.

preparing scale detergent )

Installation of the boiler

1. Set the joint (to the condenser) level by the band for boiler fixed.
After you check that there is packing in the cap nut, insert it into the boiler with the characters “YK-W-3”
upward.

‑42‑

Maintenance

Cleaning Still

Installation of the boiler

2. Connect the four heater terminals with the terminal rack.

3. Install the left side board on the unit.

4. Insert the tube into supply and drain for boiler and fix it by hose band.

Installation of the Condenser

1. Insert the packing into the joint with boiler and condenser, and fix boiler and condenser in the same
direction by metal fittings connection.

2. Connect the each hose to entrance of cooling water, exit of cooling water , and exit of distilled water.

3. Close the valve to drain boiler water.

‑43‑

Maintenance

Exchange Heaters

●

If the heater snapped or was broken, exchange the heater as follows.(Refer to P.40〜43 for
exchanging)

1. Turn “OFF” the circuit breaker .

2. Close the faucet.

3. About more than 30 min. later after turned “OFF” the circuit breaker, open the front door of this unit and
the valve to drain boiler water.

4. Open the left side board, loosen the four connecting screws in right side of terminal rack, and pull the
heater terminal.

5. Pull the heater terminal from the grommet.

6. Remove the cap nut of the heater, and pull t he heat er.

7. Remove the packing and the cap nut from the broken heater.

8. Install the packing and the cap nut to the new heater.
At this time, do not touch it with empty hands not t o apply the finger marks.

9. Insert it into the boiler with the heater mark “YK-W-3” upward.

10. Insert the heater terminal into the grommet, and fix it in the terminal rack with checking the position of
installing heater lead.

11. Install the left side board on the unit.

12. Close the valve to drain boiler water.

13. Open the faucet after closing the front door.

14. Turn “ON” the circuit breaker.

15. Check that the STAND-BY lamp lit.

16. Push the calibrate switch in the upper part of the circuit breaker.
(The calibrate switch is a switch to memorize in the inside controller the standard temperature which
the sensor inside the each heaters shows at normal running. It senses malfunction when the
temperature become 20℃ high more than the standard temperature for som e reasons at the normal
running. )

17. At the calibrate running for 5 min. long, the indicator (1) of the operation panels blinks CAL.

18. After 5 min. calibrate running, the running become normal automatically.

‑44‑

Clean Water Supply Hose Filter

(1) Close the faucet and remove the water supply

hose after turning off the unit breaker.
(2) Remove ② plug from ① ring with turning.
(3) Clean ⑦ filter in the plug by tap water.
(4) Push the filter by flat end of a pencil etc. from

the hole at the side of sleeve in case of terrible

stoppage.
(5) Brush the filter .
(6) Assemble the filter in the reverse procedure.

Maintenance

Exchange Hoses

●

Use the specified hose for exchange.

‑45‑

When you do not use the unit for a long time

If you do not use the unit for a long time, turn off the unit breaker for safety
and close the faucet. Water in the boiler and the distilled water tank
deteriorates its quality by the growth of unwanted bacteria and algae. Drain
as follow.

Draining boiler water

(1) Before draining the boiler water, turn off the unit

breaker , check if faucet is closed , and wait for

30 minutes or longer.
(2) Open the valve to drain the boiler water.
(3) Make sure if all water is drained from the boiler

and float receptacle.
(4) Close the boiler water draining valve. If the

drain valve remains open in the next use of the

unit, water would not flow into the boiler or start

distillation.

Maintenance

Draining distilled water

(1)Make sure if the unit breaker is turned

off. Open the front door.

(2) Pull out the hose to drain distilled water

set at the upper left on the back of front
door.

(3) Remove the silicone stopper to drain the

distilled water from the tank. Check in
advance the remaining water level in the
tank, and prepare receptacle for
drainage.

(4) Be careful not to set the drain hose

higher than the bottom level of the
distilled water tank, or more tank water
remains in the tank.

(5) Install the silicone stopper at the point

tightly,and Insert stopper securely in the
original folder after completing drainage.

‑46‑

After-sales Service and Warranty

.

When you request repair Warranty (attachment)

If any troubles should occur, note the error
code, stop the operation immediately. Turn
the power switch off, pull the power cord
out and contact the seller or Yamato
Scientific’s Technical Service Department.

(Necessary information)

●

Model number

●

Serial number

●

Date of purchase

●

See the warranty or nameplate on the unit

●

Detailed information on difficulties

●

The service man requests you to show the

warranty on his visit.

When you encounter the following

Fault indication Check points

STAND BY switch is not lit when the
breaker is turned on.

No water is supplied.

Water supply can not be stopped.

No water is supplied into the boiler.

Heater can not be turned on.
No cooling water flows.

Distilled water is not drained.
Boiler water is not drained.

Distilled water is not stored.
Distillation would not stop.

No water is collected.

●

The seller or Yamato Scientific’s gives you the warranty.

Keep your warranty card for future references. Check the

name of distributor, date of purchase and any other
contents of warranty.

●

The term of warranty is one year limited commencing the
date of purchase. Repair is made without charge
according to the contents of warranty.

●

As for repair after expiration of the warranty period,
consult the seller or our Technical Service Department.
As long as the function of the unit can be maintained by
repair, we will repair the unit upon your request.

Minimum period to keep repair parts in stock

Minimum period to keep repair parts is 7 years limited after
we stop the production of this model of units. The repair
parts mean any necessary parts to maintain the
performance of the unit.

Is the power supply cable is securely connected with the outlet?

●

●

Is there any power failure?

●

Defect of solenoid valve to supply raw water.

●

Low pressure or interruption of water service.

●

Defect of pressure switch.

●

Stoppage in the pre-treatment cartridge.

●

Defect of float switch.

●

Defect of solenoid valve to supply raw water.

●

Defect of solenoid valve to supply boiler water

●

Defect of float switch.

●

Defect of solenoid valve to drain boiler water.

●

Defect of float switch.

●

Heater disconnection.

●

Defect of solenoid valve for cooling water.

●

Defect of solenoid valve to drain initial distilled water.

●

Defect of solenoid valve to drain boiler water.

●

Defect of solenoid valve to drain initial distilled water.

●

Defect in piping.

●

Defect of float switch.

●

Defect of solenoid valve to collect ion-exchanged or distilled water

●

Defect of pump to take distilled water.

●

Defect in piping.

‑47‑

Specifications

Type WG221 WG221S

Collect

ion method ion exchange ⇒ Distillation

Pure water to collect Distilled / Ion exchanged water

Volume of distilled water to produce

Water flow to collect 1

/min. or more (Distilled / Ion exchanged water)

About 1.8 /h

Boiler Super hard gl ass

Condenser Super hard glassStill

heater Ceramic heater 1.9kw

Distilled water tank Made of pol

Raw water filter

Activated carbon and hollow fiber membrane (0.1

Pre-treatment cartridge (ACF0827)

yethylene 20

Ion-exchange resin cartridge Cartridge type of one-touch connect (CPC-N)

Water quality examiner

Digital display (selection of either electric conductivity or resisitivity)

0.05

〜

300×10

18〜0.1×10

-4

S/m･25℃ (in case of electric conductivity)

4

Ω･m･25℃

(The resistivity is shown by the integral number

from 1 to 18.)

Water supply pump Magnet pump

Indication of tank water levels 5 levels by LED display

Water volume to take 0.1

Range of raw water pressure 0.5

Power requirement

External dimensions

(W×D×H)

（50／

60 Hz

*1

）

About 570×455(590:including outlet)×730 （mm

Weight About 43

●

Water abnormality alarm

●

Automatic boiler drainage ●Automatic adjustment of cooling water level

●

Prevention of low-water boiling ●Overheat prevention

●

Supplemental functions

Water leak detector ●No water supply detector

●

Earth leakage circuit breaker ●Initial distilled water drainage

●

Abnormality detection of the float switch for the distilled water tank

●

System to set the volume of distilled water to take（WG221S only

●

System to set the volume of ion-exchanged water to take

〜5 ×

100 kPa（0.5〜5 kgf／cm

AC100V About 15A

〜

99.9

（kg）

Water supply hose , Drain hose , Joint hose 1 (for each)
Instruction manual this book
Warranty 1

Accessories

Hose clamp 1
Scale detergent (1kg ) 1
Pre-treatment cartridge 1
Ion-exchange resin cartridge 1
Type Part No.

●

Water outlet unit -------------------------- (OWH10) 253686

●

Drain trap ----------------------------------- (OWI10) 253211

●

Pressure pump (OWJ10) --------------- (OWJ10) 253220

●

Non-standard accessories

WQ500/501 joint unit -------------------- (OWQ10) 253695

●

Carrier --------------------------------------- (AS200) 253175

●

WL100 joint unit --------------------------- (OWL20) 253668

●

Joint unit of membrane filter ------------ (OWM30) 253667

●

Membrane filter ---------------------------- (OWN10) 253670

*1…The exterior dimensions exclude projected areas.

μｍ

Mix bed Resin 3

2

）

)

）

）

‑48‑

WG221/221S

1 3

1 30

1 3 4 5

Wiring Diagram

1 5 6 10

Symbol Name of Parts Symbol Name of Parts Symbol Part of Name

Cal_SW Calibrat e SW SV1 Solenoid valve to supply boiler water T1 Terminal

E1 Electrode for ion-exchanged water SV2 Solenoid valve to supply raw water T2 Terminal
E2 Electrode for distilled water SV3
E2 2 Electrode for distilled water SV4 Solenoid valve to drain boiler water Tf2 Transformer

ELB Earth leak age circuit breaker SV5

FL1 Flow sensor (ion-exchanged water) SV6 Solenoid valve for cooli ng water X1 Relay
FL2 Flow sensor(distilled water)WG221S

only
FS1 Float switch to control heater OH Overheat detector
FS2 Float switch to control boiler water level P1 Pump to tak e water
FS3 Float switch for boiler overheat PIO-5 Operation board
FS4 Float switch to check water level PLANAR P l anar board
FS5 Float switch to check water level RELAY1 Relay board
FS6 Float switch to check water level RELAY2 Relay board
FS7 Float switch to check water level SSR SSR board
FS8 Float switch to check water level

H1 Heater

MOS RELAY

MOS relay board

SV7 Solenoid valve to take distilled water PS Pressure switch

Solenoid valve to drain initial distilled water

Solenoid valve to take ion-exchanged water

Tf1 Transformer

WL

Water leak detector

‑49‑