Yamato WG270 Instruction Manual

Water Purifier

SUPER AUTO STILL

Model

WG270

Instruction Manual

- First Edition -

Yamato Scientific America Inc．

Santa Clara，CA

Printed on recycled paper

 Thank you for purchasing "Auto Still, WG 270

of Yamato Scientific Co., Ltd.

 To use this unit properly, read this "Instruction

Manual" thoroughly before using this unit.
Keep this instruction manual around this unit
for referring at anytime.

WARNING!:
Carefully read and thoroughly understand the
important warning items described in this
manual before using this unit.

Contentes

1. Cautions in Using with Safety............................................................................................................ １

Explanation ........................................................................................................................................ １

Table of Illustrated Symbols .............................................................................................................. ２

Fundamental Matters of "WARNING!" and "CAUTION!" ................................................................... ３

2. Before Using this unit ......................................................................................................................... ４

Requirements for Installation ............................................................................................................. ４

3. Description and Function of Each Part......................................................................................... １５

Main Unit ........................................................................................................................................ １５

Water Sampling Table ................................................................................................................... １６

Piping System View ....................................................................................................................... １７

Principle of Operation .................................................................................................................... １８

Control Panel ................................................................................................................................. ２２

4. Operation Method ............................................................................................................................ ２３

Setup and Check before Use ......................................................................................................... ２３

Operation Procedure ...................................................................................................................... ２４

Sampling of Pure Water ................................................................................................................. ２５

Collection of Measured Amount of Pure Water ............................................................................. ２６

Collection of Measured Amount of Distilled Water ........................................................................ ２７

Display of Water Quality ................................................................................................................ ２９

Setting/Display of Submenu .......................................................................................................... ３２

5. Handling Precautions ..................................................................................................................... ３５

6. Maintenance Method ....................................................................................................................... ３６

Inspection and Maintenance .......................................................................................................... ３６

Replacement of pre-treatment cartridge ........................................................................................ ３６

Replacement of ion exchange resin cartridge ............................................................................... ３７

Washing of Distiller ........................................................................................................................ ３８

Replacement of Heater .................................................................................................................. ４２

Washing of Water Supply Hose Filter ............................................................................................ ４３

Replacement of Hose .................................................................................................................... ４３

Distilled water tank drain method ................................................................................................... ４３

Replacing the TOC reduction UV lamp ......................................................................................... ４４

Checking if the TOC reduction UV lamp goes ON ........................................................................ ４５

Replacing the deaeration membrane module................................................................................ ４６

Vacuum pump ................................................................................................................................ ４７

7. Long storage and disposal ............................................................................................................ ４９

Considerations on disposing .......................................................................................................... ５０

8. In the Event of Failure… ................................................................................................................. ５２

Failure indication and Its Contents ................................................................................................ ５２

Remedy for Trouble ....................................................................................................................... ５６

Trouble Shooting ............................................................................................................................ ５７

Measures in emergency................................................................................................................. ５７

9. After-sales Service .......................................................................................................................... ５８

10. Specifications ................................................................................................................................ ５９

11. Wiring Diagram .............................................................................................................................. ６０

WG270 ........................................................................................................................................... ６０

12. Replacement Parts List ................................................................................................................ ６２

13. Consumable parts ......................................................................................................................... ６４

14. List of Dangerous Substances .................................................................................................... ６５

１

1. Cautions in Using with Safety

Explanation

MEANING OF ILLUSTRATED SYMBOLS

Various symbols are used in this safety manual in order to use the unit without
danger of injury and damage of the unit. A list of problems caused by ignoring
the warnings and improper handling is divided as shown below.Be sure that you
understand the warnings and cautions in this manual before operating the unit.

WARNING!

If the warning is ignored, there is the danger of a problem that
may cause a serious accident or even f atality.

CAUTION!

If the caution is ignored, there is the danger of a problem that may
cause injury/damage to property or the unit itself.

Meaning of Symbols

This symbol indicates items that urge the warning (including the caution).
A detailed warning message is shown adjacent to the sy mbol.

This symbol indicates items that are strictly prohibited.
A detailed message is shown adjacent to the sy mbol with specific actions not to
perform.

This symbol indicates items that should be always performed.
A detailed message with instructions is shown adjacent to the symbol.

Illustrated Symbols

２

1. Cautions in Using with Safety

Table of Illustrated Symbols

Warning

Warning,
generally

Warning,

high voltage

Warning,

high

temperature

Warning,

drive train

Warning,

explosive

Caution

Caution,

generally

Caution,

electrical shock

Caution,

scald

Caution,

no road heating

Caution,

not to drench

Caution,

water only

Caution,

deadly poison

Prohibit

Prohibit,

generally

Prohibit,

inflammable

Prohibit,

to disassemble

Prohibit,
to touch

Compulsion

Compulsion,

generally

Compulsion,

connect to the

grounding

terminal

Compulsion,

install on a flat

surface

Compulsion,

disconnect the

power plug

Compulsion,

periodical

inspection

３

1. Cautions in Using with Safety

Fundamental Matters of "WARNING!" and "CAUTION!"

WARNING!

Do not use this unit in an area where there is flammable or explosive gas

Never use this unit in an area where there is flammable or explosive gas.
This unit is not explosion-proof. An arc may be generated when the power switch is turned on or off,
and fire/explosion may result. (Refer to Page 67"List of Dengerous Substance”)

Be sure to connect grounding wire.

Connect to grounded plug socket. If no grounded plug socket is available, be sure to connect
grounding lead by use of ground adapter attached in nonstandard. Failure to do so could cause
electric shock or fire.

If a problem occurs

If smoke or strange odor should come out of this unit for some reason, turn off the power key right
away, and then turn off the circuit breaker and the main power. Immediately contact a service
technician for inspection. If this procedure is not followed, fire or electrical shock may result. Never
perform repair work yourself, since it is dangerous and not recommended.

Do not use the power cord if it is bundled or tangled

Do not use the power cord if it is bundled or tangled. If it is used in this manner, it can overheat and
fire may be caused.

Do not process, bend, wring, or stretch the power cord forcibly

Do not process, bend, wring, or stretch the power cord forcibly. Fire or electrical shock may result.

Do not disassemble or modify this unit

Do not disassemble or modify this unit. Fire or electrical shock or failure may be caused.

Do not touch hot portion

Boiler may be hot in some portion in operation or immediately after operation. Be aware of burns.
When performing maintenance of heater etc., ensure that the boiler is cooled down beforehand.

Close the tap when unit is out of service

When unit is out of service (at night or on holiday), be sure to close the tap so as to avoid water
leakage accident.

CAUTION!

During a thunder storm

During a thunderstorm, turn off the power key immediately, then turn off the circuit breaker and the
main power. If this procedure is not followed, fire or electrical shock may be caused.

Exercise care in handling washing liquid (Orgazor)

Principal component of washing liquid (Orgazor) is sulfamic acid, which is acidic almost equal to water
solution PH:1. Use protective tool (gloves, mask, and glasses) in handling. When it is touched by
human body, immediately wash it away with clean water.

４

2. Before Using this unit

Requirements for Installation

WARNING!

1. Be sure to connect grounding wire.

 Always connect the equipment to the ground. If the equipment is not grounded, ground

leakage, if any, may not activate the ground leakage breaker, resulting in
extremely-hazardous electric shock.

 Connect the grounding wire either to the grounding wire or grounding terminal block of the

electric power equipment. If the grounding equipment is not available, consult the nerest
electric constructor and carry out grounding according to Article 18 (Type III Grounding Work
of 100Ω or less) of the Technical Standards for Electric Equipment.

 Never connect the grounding wire to gas pipe or water supply pipe.

2. Choose a proper place for installation

 Do not install this unit in a place where:

 Rough or dirty surface.
 Flammable gas or corrosive gas is generated.
 Ambient temperature 35C and above or 5C and below.
 Ambient temperature fluctuates violently.
 There is direct sunlight.
 There is excessive humidity and dust.
 There is a constant vibration.
 Not horizontal surface.

 The power source is instable.

Keep space around each product above the range shown below.
Install units within sink equipment if possible.

10 ㎝ or
more

10 ㎝ or
more

10 ㎝ or
more

５

2. Before Using this unit

Requirements for Installation

WARNING!

3. Do not use this unit in an area where there is flammable or explosive gas

● Never use this unit in an area where there is flammable or explosive gas. This unit is not
explosion-proof. An arc may be generated when the power switch is turned ON or OFF, and
fire/explosion may result.

● To know about flammable or explosive gas, refer to Page 67 "List of Dangerous
Substances".

Explosive gas

Flammable gas

4. Do not modify

 Never disassemble this unit.
 This unit has high voltage inside in some portion, which may cause electric shock. Contact

a local dealer or Yamato sales office for adjusting or repairing inside.

 In routine maintenance and inspection, follow the procedure described in the instruction

manual. Do avoid modification by customer because it may lead to trouble.

Modification

６

2. Before Using this unit

Requirements for Installation

WARNING!

5. Installation on horizontal surface

 Set this unit to the flattest place. Setting this unit on rough or slope place could cause the

unexpectible trouble or malfunction.
The unit WG270 weighs 55kg gross. Two or more persons are required for carrying or
setting these units.

6. Choose a correct power distribution board or receptacle

 Use a plug socket conforming to electric capacity (capacity 15A or greater).
 When power capacity is insufficient, sampling of distilled water goes short, and normal

control is disabled by fall of power voltage. Connect to power equipment having sufficient
power capacity.

Electric capacity： WG270 AC220V Single phase 7A

7. Connection of power cord

 Always ensure that breaker on power unit side is "Off" before connecting power cord.

Power plug of WG270 uses 3-core cord including grounding wire, and the plug is grounded
type. If your plug socket is not compatible (2P), use a ground adapter attached in
nonstandard. In using ground adapter, be sure to ground a grounding lead.

8. Handling of power code

 Do not entangle the power cord. This will cause overheating and possibly a fire.
 Do not bend or twist the power cord, or apply excessive tension to it. This may cause a fire

and electrical shock.

 Do not lay the power cord under a desk or chair, and do not allow it to be pinched in order to

prevent it from being damaged and to avoid a fire or electrical shock.

 Keep the power cord away from any heating equipment such as a room heater. The cord's

insulation may melt and cause a fire or electrical shock.

 If the power cord becomes damaged (wiring exposed, breakage, etc.), immediately turn off

the power at the rear of this unit and shut off the main supply power. Then contact your
nearest dealer for replacement of the power cord. Leaving it may cause a fire or electrical
shock.

 Connect the power plug to the receptacle which is supplied appropriate power and voltage.

７

2. Before Using this unit

Requirements for Installation

WARNING!

9. Observe the specified pressure range of raw water from waterworks

 Apply the range of city water pressure between 0.5 - 5 X 100kPa (0.5 - 5kgf/cm2) including

nighttime.

 Range of raw water pressure is the same when "Water Supply Port Unit" (optional

accessory) is used.

10. Connect the water supply hose securely

 Take the supply hose (with connection port) out of attachments Install the unit on a

horizontal and stable place nearby tap and sink.

 If not connecting the water supply hose securely, the water supply hose or connection port

may be disconnected, resulting in water leakage such as water bursting forth.

11. Connect the tap side

1. Slide the sleeve of socket ③ on connection port side in the arrow direction, then

connection port body and water supply hose can be separated. There separate the two
parts.

2. Once loosen the plug ② from the ring ①.

3. Tighten the 4 mounting screws ⑤ uniformly while pressing the ring ① slightly and

uniformly to make the packing ⑥ in flat contact with water tap. If the tap is a chemical
tap, adjust the position so that the mounting screw is located at the bottom valley of tap
nipple as shown.

4. Turn the plug ② clockwise to tighten securely. This will allow the tap and connection port

to be sealed by packing ⑥.

5. Insert the socket ③ securely to the plug ② with the sleeve slid in the arrow direction.

The sleeve returns to the original position when released, and then connection is
completed.

* In case that the socket is removed, the valve attached on the connection side of the main

unit stops the flow of water.

Tap

Connection
port body

Socket on
connection
port side

Water
supply hose

Water supply port

Sleeve on water

supply side

④

Tap

⑤

⑥

⑦

①

②

③

Sleeve

Water supply

hose

Connection Port Body

①Ring
②Plug
③Socket
④Spacer
⑤Mounting Screw
⑥Packing
⑦Filter

One-touch
Joint

８

2. Before Using this unit

Requirements for Installation

WARNING!

12. Connection on body side

1. Remove the rubber cap from the

water supply port plug ⑧.

2. Insert the socket ⑨ securely to

the plug ⑧ on body side with the
sleeve slid in the arrow direction.
The sleeve returns to the original
position when released, and then
connection is completed. The
socket contains a valve inside,
which opens only when the socket
is connected by plug; otherwise,
water is not fed because this valve
does not open.

Body side

13. Connect the water supply hose to the tap provided with sink equipment

 If the water supply hose is

connected to a tap without sink
equipment, flood damage may be
caused when water supply hose is
disconnected or damaged; therefore
be sure to connect to a tap having
sink equipment.

14. When the sink equipment is remote from water tap, use "Water Supply Port Unit"
(optional accessory)

 "Water Supply Port Unit" is designed to loosen the connection to the tap harder than the set

of standard water supply hoses when water pressure fluctuates.

15. In case that there is no tap, use appropriate joint shown in the optional "Coupler
joints for feed water".

Tap

Water supply
hose

Socket on
connection
port side

Connection port Body

Sink

Sleeve ⑨

⑧

９

2. Before Using this unit

Requirements for Installation

WARNING!

16. Connect the drain hose securely

 If the drain hose is not connected securely, it may be disconnected, leaking water in the unit,

or leading to trouble of system.

1. Pick up the drain hose (with elbow) and the hose clamp from the main unit accessories.

2. Always make sure that the earth leakage breaker of the unit is "OFF".

3. Remove the rubber stopper from the outlet of the drain port hose on the main unit.

4. Push the hose clamp into the elbow of the drain hose, and next, put the elbow into the drain
outlet hose of the main unit, then tighten the hose clamp securely.

5. Pull the hose out from the drain hose-end outlet at right/left or backside of the main unit.

Hose
clamp

Drain port hose on
the main unit

Elbow

Drain hose (accessory)

17. Use care in routing of drain hose

 Do avoid making bend or projection of drain hose.
 In case that the drain hose is bent and the drain cannot be performed, back-flow or breakage

of the cooling hose might occur.

 Place the drain hose lower than the drain port of this unit. Further, avoid piping which

allows paddle in the hose or at the hose outlet, because it is a resistance against drain.

 Place the end of drain hose where drain is allowed. When distilled water is being prepared,

cooling water is drained approx. 2 liters/min. Also drain further increases when boiler water
is drained, and sufficient drain equipment is required.

１０

2. Before Using this unit

Requirements for Installation

WARNING!

18. Check the drain temperature of cooling water

 Drain temperature may exceed 60℃ in drainage from boiler. Drain to a place remote from

working environment not to be touched easily because there is a danger of burns.

 High-temperature cooling water could flow out. If vinyl chloride tube is used for the water

drain unit of the sink, such a tube could deteriorate. Water should be drained to a place
away from the drain tube of the sink. Even if VP tube (JIS K6741) is used for the vinyl
chloride tube, DV-RR joint is used for the joint, and even if insert socket (JIS K6739) is used,
the water drain trap in the nonstandard options should be used when the control temp.
cannot be lowered (60℃ or lower). Even if the drain temperature is 60℃ or lower, and if
the above-mentioned tubes and joint are not used, the drain trap in the nonstandard options
should be used.

19. When drain temperature of sink equipment does not fall under 60℃

 Use a drain trap (optional accessory).
 Drain trap makes temperature fall by accumulating cooled drain water temporarily. Further,

it mixes city water and cooled-down drain water, makes mixed water temperature fall, then
lets drain to sink equipment.

 Contact your dealer or Yamato Scientific sales office for detail of drain trap.

１１

2. Before Using this unit

Requirements for Installation

WARNING!

20. Install firmly the ion exchange resin cartridge (CPC-N) and high-purity cartridge

(CPC-H).

 Install the ion exchange resin cartridge (CPC-N) and high-purity cartridge (CPC-H) following

the procedure shown below.

 Connect securely because insecure connection may cause water leakage.

1. Make sure that the earth leakage breaker of this unit is "Off" and that the tap is tightened.

2. Take the ion exchange resin cartridge and high-purity cartridge out of attachments to the
unit.

3. Place the ion exchange resin cartridge and high-purity cartridge taken out on the receiver
within the unit. (See Fig.1.)

4. Fix the ion exchange resin cartridge and high-purity cartridge with the band of receiver.
(See Fig.2.)

Fig.1 Fig.2

5. Remove the rubber cap attached to the inlets and outlets of ion exchange resin cartridge
and high-purity cartridge.

6. Fit in the coupler marked with (IN) to the inlet of ion exchange resin cartridge (left) until click
is heard and repeat the procedure in the same way for high-purity cartridge. (See Fig.3.)

7. Fit in the coupler marked with (OUT) to the outlet of ion exchange resin cartridge (right)
until click is heard and repeat the procedure in the same way for high-purity cartridge. (See
Fig.3.)

IN

リセットスイッチ

I

N

O

U

T

OUT

Fig.3

Coupler may be hard at first. When applying force in inserting, do not make it curved

because insertion port may be broken.

8. Coupler can be removed easily from the ion exchange resin cartridge by pulling it toward
yourself while pushing the black part of the coupler to the depth.

１２

2. Before Using this unit

Requirements for Installation

WARNING!

21. Secure the pre-treatment cartridge securely

 Connect the hose in the body securely following the procedure shown below.
 Insecure connection may cause disconnection of connection hose, resulting in accident by

water leakage.

1. Make sure that the earth leakage breaker of this unit is "OFF" and that the tap is tightened.

2. Take the pre-treatment cartridge ① out of attachments to the body.

3. Inlet and outlet of the pre-treatment cartridge ① are provided with a cap, so remove it.

4. When the front door of this unit is opened, connection hose marked IN and OUT is found in
the coupler② there make connection matching them with IN and OUT on pre-treatment
cartridge ①.

5. In connecting, mate the coupler and port of cartridge while sliding the blue portion ③ of
coupler toward the hose, push in, then release the blue portion ③.

6. When connection is finished, place the pre-treatment cartridge at the position shown on the
right (near side on the left of distilled water tank) as paying attention to the bend of hose.

Fig.4

Fig.5

②

①

１３

2. Before Using this unit

Requirements for Installation

WARNING!

22. Install the membrane filter firmly.

 Install the membrane filter as follows:
 Unless firm connection is made, water may leak from the threaded portion and may be mixed

into and contaminate the sampled pure water. Always ensure firm connection.

clockwise as viewed from the tape windind side two to three turns while pulling the tape
slightly. Remaining tape should be cut away.

care not to crush threads. Check for water leak during sampling of pure water. If any,
screw the membrane filter further.

１４

2. Before Using this unit

Requirements for Installation

WARNING!

23. Essential Points for Initial Use

 In the case of WG270, the quality of distilled water stored in the distilled water tank may be

worse than the A4 level quality temporarily because of contact with the atmospheric air.
WG270 is equipped with the function to recover the water quality of such pure water to the
A4 level by means of circulation under ultraviolet ray irradiation and removal of CO2 gas.

 It may take hours for the distilled water stored in the tank after initial start of WG270 to reach

the A4 level water quality. Carry out cleaning of the tank inside as follows:
(1) Install and start operation of WG270 system. Keep operation till the tank is filled with

the distilled water.
(2) Discharge the distilled water totally from the outlet of distilled water tank.
(3) Start operation again and keep operation till the tank is filled with the distilled water.
(4) When the tank is full of the distilled water, continue operation without turning OFF power

supply (keep the distilled water circulating). In four or more hours, use the distilled

water. (This step is necessary for initial operation only).

 A guideline is as follows. If the specific resistance of distilled water is maintained at 1.2Ｍ

Ω・cm or more for one hour or more continuously, the distilled water with the A4 level or
higher water quality can always be sampled.
If the specific resistance of distilled water is less than 1.2MΩ・cm, continue operation
(keep the distilled water circulating) for approximately four hours or more before sampling
the distilled water.

 When the distilled water has been stored for two weeks or more in the tank, drain the water

totally and start operation. Take steps (3) and (4) above before using the distilled water.

24. After installation

This unit may be turned over under unexpected earthquake or impact. Provide adequate

measures against such turn-over to ensure the safety.

１５

3. Description and Function of Each Part

Main Unit

WG270

Boiler

Heater

Heater

terminal block

Ion exchange resin cartridge (CPC-N)

Drain port
(2pcs each at right/left)

Earth leakage breaker

Ion exchange water

sampling port

Pre-treatment cartridge

Distilled water tank

Reset switch

Water sampling table

Drain switch for

water sampling table

Distilled water

sampling port

Leakage detection electrode

Drain cock

Control panel

Product number sticker

High-purity cartridge (CPC-H)

Water feeding port

１６

3. Description and Function of Each Part

Water Sampling Table

Water sampling table

Use the water sampling table by pulling it out frontward. Because coolant for condenser is used, so
for draining the water in the following cases (and coolant is not flowed), press the drain switch
specifically used for the water sampling table at right side of the unit.

Coolant flows for one minute, and then, the water sampling table is drained. After that, returns to
the condition before pressing the switch.

① When the tank is filled to capacity (Distillation is not operated.)
② When drawing pure water
③ While standby time (the breaker is turned on, and POWER key is turned off.)

Drain switch for
water sampling table

Water sampling table

１７

3. Description and Function of Each Part

Piping System View

1. Pressure reduction valve

2. Pressure switch

3. Cooling water solenoid valve

4. Raw water supply solenoid valve

5. Pre-treatment cartridge

6. Electromagnetic pump

7. Ion exchange resin cartridge (CPC-N)

8. Ion exchange water quality gauge
electrode (for CPC-N)

9. High-purity cartridge (CPC-H)

10. Float cylinder

11. Float switch (1)

12. Float switch (2)

13. Boiler drain solenoid valve

14. Boiler drain cock

15. Boiler

16. Heater

17. Condenser

18. Ion exchange water quality gauge
electrode (for CPC-H)

19. Check valve

20. Boiler water supply solenoid valve

21. Initial accumulated water drain solenoid
valve

22. Distilled water quality gauge
electrode

23. Deaeration membrane module

24. Solenoid valve for vacuum pump

25. Vacuum pump

26. TOC reducing UV lamp

27. Distilled water sampling pump

28. Distilled water tank drain port

29. Float switch (3)

30. Distilled water tank

31. Air filter

32. Check valve for circulation return

33. Ion exchange water sampling
solenoid valve

34. Distilled water sampling solenoid
valve

35. Ion exchange water flow sensor

36. Distilled water flow sensor

37. Ion exchange water sampling port

38. Distilled water sampling port

39. Membrane filter

40. Aspirator

１８

3. Description and Function of Each Part

Principle of Operation

Description of the operation mechanism of WG270.

(1) Drain of the boiler

 Set the earth-leakage breaker to “ON”, and the standby screen appears in about four seconds. In

this state, press the POWER key, the boiler drain solenoid valve ⑬ and cooling water solenoid valve
③ open simultaneously for about 40 seconds. Boiler drain is made every five hours of distillation
operation.

(2) Boiler Water Supply and Distilling Operation

 When drain of boiler is finished, both the raw water supply solenoid valve ④ and boiler water supply

solenoid valve ⑳ open simultaneously, supplying water to the boiler ⑮. When the float switch (1) ⑪
in the float cylinder ⑩ detects the water level, the heater ⑯ is energized to start distillation. Water
supply to the boiler is controlled by opening/closing the raw water supply solenoid valve ④ and
boiler water supply solenoid valve ⑳ with the fload switch（2）⑫. The supply-water circulation pump
⑥ keeps circulation of the ion-exchanged water normally during distillation, ensuring stable water
supply to the boiler ⑮.

１９

3. Description and Function of Each Part

Principle of Operation

(3) Flow of Cooling Water

During distillation, water is supplied and discharged in the order: ① pressure-reducing valve, ③ cooling
water solenoid valve and condenser ⑰. When the distilled water tank is full, or when ion exchanged
water is sampled, distillation is stopped, and the cooling water is also stopped automatically.

(4) Sampling of Distilled Water

 Distilled water condensed in the condenser ⑭ is stored in the distilled water tank○30 for about 10

minutes from the start of distillation. In this case, the initial accumulated water drain solenoid
valve○21 opens to discharge this water beforehand. When the float switch○29 at the top portion inside
the tank is activated, the tank is judged to be full and distillation stops. When the distilled water is
consumed to a certain level through its sampling, the unit generates the distilled water automatically.
Stored distilled water is sampled, via TOC reduction UV○26, deaeration membrane module○23 , distilled
water quality electrode○22 , distilled water sampling solenoid valve○34 , distilled water flow sensor○36 ,
distilled water sanpling port○38 , and membrane filter○39 , by the distilled water sampling pump○27 .

２０

3. Description and Function of Each Part

Principle of Operation

(5) Sampling Ion Exchanged Water

 Ion exchange water is sampled by way of the pressure-reducing valve ①, raw water supply solenoid

valve ④, pre-treatment cartridge ⑤, supply-water circulation pump ⑥, ion exchange resin cartridge

⑦(CPC-N), ion exchange water quality electrode ⑧ CPC-N (front), high-purity cartridge (CPC-H)
⑨, ion exchange water quality electrode CPC-H (rear)○18 , ion exchange water sampling solenoid

valve○33 , ion exchange water flow sensor ○35 , ion exchange water sampling port○37 , and membrane
filter○39 .
During ion exchange water sampling, the supply-water circulation pump ⑥ runs to circulate the ion
exchange water.

２１

3. Description and Function of Each Part

Principle of Operation

(6) TOC Reduction system

 The TOC reduction system consists of returning the distilled water stored in the distilled water tank,

via TOC reduction UV, deaeration membrane module, distilled water quality electrode, and
circulation return check valve, to the distilled water tank by means of the distilled water sampling
pump.

 With LED (the second LED from the bottom, which corresponds to the water amount of about 5.5

liters) indicating the distilled water level in the tank going ON in green, the TOC reduction system is
activated, starting circulation. Almost simultaneously with passage of the distilled water through the
deaeration membrane module, the deaeration vacuum pump is activated. The electric conductivity
of deaerated distilled water decreases. When the electric conductivity of distilled water in the tank
exceeds 0.83μS／cm, the TOC reduction UV lamp goes ON. The TOC value decreases along with
increase in this electric conductivity. When the electric conductivity increases above 0.95μＳ/cm, the
TOC reduction UV lamp goes OFF. Then, the distilled water is sampled. Circulation and vacuum
pumps stop when the level LED (the LED in the bottom, which corresponds to thwater amount of
about 2.5 liters). Under other conditions, both circulation and vacuum pumps are in operation
normally while the TOC reduction UV lamp goes ON/OFF depending on the conditions. In this
manner, the distilled water quality in the tank can be maintained.

 To protect the vacuum pump (VP), the pump is open to the atmosphere for five minutes every two

hours by means of the solenoid valve. In this case, VP exhaust sound may become louder.

２２

3. Description and Function of Each Part

Control Panel

No.

Name

Operation/Action

①

POWER key

Turns on/off the power of the controller.

②

Message indication area

Indicates the measured value and setting value.

③

WATER LEVEL lamp

Indicates water level in the distilled water tank in five levels.

④

DITILLED WATER key

Starts/stops drawing distilled water.

⑤

▲▼key

Selects the value setting item.

⑥

PURE WATER key

Starts/stops drawing ion exchange water.

⑦

FILL key

Switches water collecting method. (Measured filling/Continuous
filling)

⑧

FILL lamp

Lights up when either of MEASURED or CONTINUOUS is selected.

⑨

CONDUCTIVITY key

Switches conductivity indication unit. (S/m⇔Ω･m）

⑩

M key

Used when entering submenu or maintenance mode.
Also (confirms the setting) then shifts to the next setting item.

⑪

F key

(Cancels the setting) then returns to the previous setting item.

⑫

Pure water lamp

Lighting during pura water sampling

⑬

Distilled water lamp

Lighting duringdistilled water sampling

③ Water level lamp

This lamp indicates the storage amount of distilled water in the tank in five levels. When this red
lamp lights, distilled water cannot be collected for empty drive prevention of the pump. When this
red lamp lights, distilled water cannot be collected for empty drive prevention of the pump. When
water keeps being stored, and a red lamp in the the lower is blinked, distilled water can be gathered.
In addition, a red lamp in the the lower is turned off when the amount of storing water increases, a
green lamp since the second step lights, and the amount of storing water can be confirmed.

FILL

CONDUCTIVITY

M

F

WATER
LEVEL

MEASURED

CONTINUOUS

FULL

EMPTY

POWER

PURE
WATER

DISTILLED
WATER

FULL

EMPTY

Lighting

FULL

EMPTY

FULL

EMPTY

FULL

EMPTY

FULL

EMPTY

FULL

EMPTY

Sampling pump operating range

＜No-water＞

＜Filled＞

Blinking

Lighitng

Lignting

Lighting

Lighting

①

②

③

④

⑥

⑦

⑧

⑨

⑩

⑪

⑫ ⑬ ⑤

２３

4. Operation Method

Setup and Check before Use

WARNING!

1. Check of water supply

 Check that the water supply hose is securely connected.
 Open the tap.
 Check that water does not leak from connection of water supply hose.

2. Check of drain

 Check that the drain hose is securely connected.
 Check that the drain hose is free from bend or projection.
 When the drain hose is bent or the like, system does not operate normally, and in addition, it

may lead to water leakage accident. Inspect from time to time, and ensure that water is
drained properly.

3. Check of power supply

 Check that the power cord is connected to appropriate plug socket.

4. Before operation

 Turn on the earth leakage breaker, then, perform calibration before pressing POWER key.

Perform calibration operation at first-time using this unit (refer to page 24) and when changing
the heater of the boiler (refer to page 42).
Press POWER key while holding down PURE WATER key and DISTILLED WATER key.
Perform calibration operation (at the measured values of heater temperature and power-supply
voltage) for about five minutes, after then, distillation starts automatically.
The calibrator is used to save the reference temperature (under normal operation state) of
temperature sensor incorporated into the heater into the internal controller. If the temperature
exceeds the reference temperature by +20℃ or more due to certain reasons, it is detected as
abnormal.
Key operation becomes disable while calibration operation.In case that power failure occurs
while calibration operation, please perform calibration again.

5. Caution at initial operation

 In sampling distilled water in initial energization and drain from distilled water storage tank, air

is contained in the pump and piping, and it takes time until sampling is started.

 In sampling ion exchanged water immediately after changing pre-treatment cartridge or ion

exchange resin cartridge, it also takes time until sampling is started. Further, when each
cartridge is changed, drain about 5 liters in order to remove initial impurities.

２４

４. Operation Method

Operation Procedure

When operation is set up, follow the procedure below for operation:

1. Turning on power

FILL

CONDUCTIVITY

M F

WATER

LEVEL

MEASURED
CONTINUOUS

FULL

EMPTY

POWER

PURE
WATER

DISTILLED
WATER

Yamato

Auto Still

WG250

2005/11/1　12：00

When first-time using the unit, perform calibration
operation.

1. Turn on the earth leakage breaker.

2. Press POWER key while holding PURE WATER
key and DISTILLED WATER key.

3. After five minutes passed, distillation starts
automatically. (Clause 3)

From the second time using:

① Turn on the earth leakage breaker.
② Press POWER key.

2. Drain of the boiler

FILL

CONDUCTIVITY

M F

WATER

LEVEL

MEASURED
CONTINUOUS

FULL

EMPTY

POWER

PURE
WATER

DISTILLED
WATER

Boiler Drainage

DW/DI Water

Not Available

Drain of the boiler starts.
Drain of the boiler starts when turning on/off the earth

leakage breaker, and when five hours passed after
distillation starts. (Drain of the boiler does not start if
POWER key is not turned on.)

3. Distillation operation

FILL

CONDUCTIVITY

M F

WATER

LEVEL

MEASURED
CONTINUOUS

FULL

EMPTY

POWER

PURE
WATER

DISTILLED
WATER

In Distillation

Tank Empty

Distill-Water NA

Continuous

Distillation operation starts.
When there is no water in the tank, the left screen is

displayed and sampling continues to be impossible
after removal of the empty state ‘Red LED flashing).
When the level LED changes from flashing in red to
continuous lighting in green, circulation of distilled
water begins. The screen shown below appears.

In Distillation

DW-Conductivity

0.854×10-4S/m

Continuous

It takes approx. 4 hours till the tank is filled at the
water collection available level. The above screen
appears. When the tank is full, the below screen
appears.

DW Tank Full

DW-Conductivity

0.854×10-4S/m
Continuous

②

②

②

WG27 0

２５

４. Operation Method

Sampling of Pure Water

Continuous collection of pure water

FILL

CONDUCTIVITY

M F

WATER

LEVEL

MEASURED
CONTINUOUS

FULL

EMPTY

POWER

PURE
WATER

DISTILLED
WATER

DI sampling

DIS-Conductivity

0.06×10-4S/m

Continuous

DI sampling

DIH-Conductivity

0.06×10-4S/m
Continuous

During distillation or when the distilled water
tank is full, pressing the PURE WATER key
while “CONTINUOUS” of the sampling selector
lamp is ON causes the pure water lamp goes
ON, enabling sampling of the pure water.
（If distillation is being made, the distillation

operation is stopped temporarily.）
Collecting water stops by pressing

PURE WATER key again. Then, PURE
WATER lamp is turned on. After water
collection is finished, it returns to distillation
operation.

Continuous collection of distilled water

FILL

CONDUCTIVITY

M F

WATER

LEVEL

MEASURED
CONTINUOUS

FULL

EMPTY

POWER

PURE
WATER

DISTILLED
WATER

DI sampling

DIS-Conductivity

0.06×10-4S/m

Continuous

DW sampling

DW-Conductivity

0.854×10-4S/m
Continuous

While the distilled water tank level LED is ON in
green and when “CONTINUOS” of the
sampling selector lamp is ON, pressing the
DISTILLED WATER key causes the distilled
water lamp to go ON, enabling sampling of the
distilled water.

To stop sampling, press the
DISTILLED WATER key again, and the
distilled water lamp goes OFF.
During sampling of distilled water, distillation is
continued.
Sampling is possible till the distilled water tank
level LED goes ON in red.

２６

４. Operation Method

Collection of Measured Amount of Pure Water

1. Switching water collection method

FILL

CONDUCTIVITY

M F

WATER

LEVEL

MEASURED
CONTINUOUS

FULL

EMPTY

POWER

PURE
WATER

DISTILLED
WATER

In Distillation

DW-Conductivity

0.85×10-4S/m

Measured: 0.1L

Switch to “MEASURED” amount water collection

method.

Switch from “CONTINUOUS” to “MEASURED” by

pressing FILL key.

2. Amount of collecting water setting

FILL

CONDUCTIVITY

M F

WATER

LEVEL

MEASURED
CONTINUOUS

FULL

EMPTY

POWER

PURE
WATER

DISTILLED
WATER

In Distillation

DW-Conductivity

0.85×10-4S/m

Measured: 20.0L

Set the amount of collecting pure water. The same
setting screen is used for setting of pure water and
distilled water.

1. Set the amount of pure water by pressing ▲▼
key.
WG270: Setting can be made up to 20 liters

2. After setting, pressing PURE WATER key starts
water collection.

3. Collecting

FILL

CONDUCTIVITY

M F

WATER

LEVEL

MEASURED
CONTINUOUS

FULL

EMPTY

POWER

PURE
WATER

DISTILLED
WATER

DI sampling

DIS-Conductivity

0.06×10-4S/m

Continuous

DI sampling

DIH-Conductivity

0.85×10-4S/m

Measured: 18.2L

Water collection of measured amount starts.

1. The counter starts decrementing from the setting
value.

2. When collecting water is finished, message
"Measured: 0.0L" appears on the window.

3. Go back to clause 2.

 If pressing PURE WATER key while collecting water,

the operation stops and the setting value is reset.

②

①

２７

４. Operation Method

Collection of Measured Amount of Distilled Water

1. Switching water collection method

FILL

CONDUCTIVITY

M F

WATER

LEVEL

MEASURED
CONTINUOUS

FULL

EMPTY

POWER

PURE
WATER

DISTILLED
WATER

In Distillation

DW-Conductivity

0.85×10-4S/m

Measured: 0.1L

Switch to “MEASURED” amount water collection

method.

Switch from “CONTINUOUS” to “MEASURED” by

pressing FILL key.

2. Amount of collecting water setting

FILL

CONDUCTIVITY

M F

WATER

LEVEL

MEASURED
CONTINUOUS

FULL

EMPTY

POWER

PURE
WATER

DISTILLED
WATER

In Distillation

DW-Conductivity

0.85×10-4S/m

Measured: 20.0L

Set the amount of collecting distilled water. The same
setting screen is used for setting of pure water and
distilled water.

1. Set the amount of distilled water by pressing ▲▼
key.
WG270: Setting can be made up to 20 liters

2. After setting, pressing DISTILLED WATER key
starts water collection.

3. Collecting

FILL

CONDUCTIVITY

M F

WATER

LEVEL

MEASURED
CONTINUOUS

FULL

EMPTY

POWER

PURE
WATER

DISTILLED
WATER

DW sampling

DW-Conductivity

0.85×10-4S/m

Measured: 18.2L

Water collection of measured amount starts.

1. The counter starts decrementing from the setting
value.

2. When collecting water is finished, message
"Measured: 0.0L" appears on the window.

3. Go back to clause 2.

 If pressing DISTILLED WATER key while collecting

water, the operation stops and the setting value is
reset.

②

①

２８

４. Operation Method

Collection of Measured Amount of Distilled Water

In case that the tank becomes empty while collecting water

FILL

CONDUCTIVITY

M F

WATER

LEVEL

MEASURED
CONTINUOUS

FULL

EMPTY

POWER

PURE
WATER

DISTILLED
WATER

In Distillation

Tank Empty
Distill-Water NA
Measured: 15.0L

1. The left screen is displayed when the tank
becomes empty during collecting water, and
DISTILLED WATER lamp blinks and operation of
water collection is suspended.

2. Distillation starts.

3. In case that "EMPTY" lamp of WATER LEVEL
display does not light up, press

DISTILLED WATER key again to start collecting
water. If PURE WATER key is pressed under this
condition, the holding condition is released.

4. After collecting water is finished, "Measured: 0.0L"
appears on the window, and return to the screen of
Clause 2.

Cautions

1. During distillation and ion exchange, the supply water circulation solenoid pump is always running.
When the distilled water tank is full, this pump stops. To sample pure water while this pump is
stopped, set this pump normally ON in the sub-menu and sample pure water after stabilization of
the water quality. This pump can be set to normal operation from the sub-menu while the distillation
water tank is full.

2. If the supply water circulation pump has been set to normally ON, its setting is cancelled under
following conditions:

① Power key turned OFF
② Distilled water sampled, the storage tank water level lowering, and distillation resumed
③ Abnormality

③

２９

４. Operation Method

Display of Water Quality

Switching conductivity unit

FILL

CONDUCTIVITY

M F

WATER

LEVEL

MEASURED
CONTINUOUS

FULL

EMPTY

POWER

PURE
WATER

DISTILLED
WATER

DW sampling

DW-Conductivity

0.85×10-4S/m

Continuous

Switch the conductivity unit.
Pressing CONDUCTIVITY key for 2 seconds switches

the conductivity unit.
Ex)

In case of switching the conductivity unit during
collecting distilled water

DW sampling

DW-Conductivity

0.85×10-4S/m

Continuous

DW sampling

DW-Resistivity

1.17×104Ω･m

Continuous

Display is made in the following order: Conductivity
→ Specific resistance → Conductivity.

Switching conductivity display

FILL

CONDUCTIVITY

M F

WATER

LEVEL

MEASURED
CONTINUOUS

FULL

EMPTY

POWER

PURE
WATER

DISTILLED
WATER

DW sampling

DW-Conductivity

0.85×10-4S/m

Continuous

Switch the conductivity display.
The ion water conductivity is displayed durig sampling
of pure water. In other cases, the conductivity of

distilled water is displayed.（Excluding the period up to
start of circulation of distilled water inside the tank.）

Pressing the Conductivity key enables switching of
water quality display in the order of pure water
CPC-H→ pure water CPC-N→ distilled water→ pure
water CPC-H.

Example： To display the pure water conductivity

during sampling of the distilled water:

DW sampling

DW-Conductivity

0.85×10-4S/m

Continuous

DW Sampling

DIH-Conductivity

0.06×10-4S/m
Continuous

With out key operation for about 10 seconds, the
conductivity returns to the original one.

３０

４. Operation Method

Display of Water Quality

Measurement of Electric Conductivity

The water conductivity meter on the control panel displays the conductivity at the outlets of the
ion-exchange resin cartridge and the condenser for distilled water. The displayed value can be used
as an index for replacing the ion-exchange resin cartridge. The value of conductivity is valid only
when the electrode is fully damped with water, or when pure water is dripped. Correct value is not
displayed in the following cases because the electrode is not damped or air bubbles are produced.

1. At beginning of operation and during halts

2. Just after changing pretreatment cartridge or ion-exchange resin cartridge

3. Just after distillation starts

Electric conductivity

 Electric conductivity is a value indicating easiness of flowing of electricity. In the case of water,

electricity flows the more easily when the more electrolyte i.e. impurity is solved, so the value of
conductivity is the greater; when the less electrolyte is solved, the smaller is the value.

 When the value of electric conductivity is the smaller, the better is purity of pure water. Here,

electric conductivity indicates only electrolyte, and does not indicate content of non-electrolyte
(such as organic substance, colloid substance, dissolved gas, and microorganism), and it is just an
index indicating purity of pure water, and it does not represent all of purity.

 Specific resistivity indicates the same contents as electric conductivity. Specific resistivity is

inversely related to electric conductivity, and when the value is the greater, the better is purity.

 When obtaining specific resistivity from electric conductivity, where specific resistivity is R and

electric conductivityρ,

R［Ω･m］

1

　 S m］





[ /

or

R［×10 Ω･m］

1

　 ×10 S m］

４

－４





[ /

So the theoretical value of pure water is as follows:
R=18.3×104Ω･m (18.3MΩ･cm) 25℃
(Take notice that the resistivity is displayed in integer form (not in decimal) in the range 18 to 1 x
10４Ω・m.)
ρ=0.055×10-4S/m (0.055μS/cm) 25℃

Quality of ion exchange water and distilled water

 Ion exchange water and distilled water have the following features respectively. Distinguish them

as necessary in use.
It is ideal to use pure water immediately after sampling; therefore be sure to drain water in distilled

water tank if it is out of use for a long time. If water has been stored in distilled water tank for a
long time, drain once, then store in distilled water tank newly before use.

1. Ion exchange water
Most of electrolyte in water is removed, and water with the lowest electric conductivity is
obtained. However, non-electrolyte cannot be removed. In addition, slight fall of purity is found
while resin is new and when water is fed again after halt of system.

2. Distilled water
Electrolyte and non-electrolyte can be removed in average except for low boiling point
substance such as ammonia. However, carbon dioxide gas in the atmosphere is absorbed
and carbon oxide is generated in the process of manufacturing (condensing/storing), and so the
electric conductivity is worse than ion exchange water, that is 1 to 2.5 X 10-4 S/m (1 to 2.5 μ

S/cm) at 25℃, and represents weak acid (pH5 to 6).
See "2 - Common item (11) Water" of JIS K0102 (Plant drain test procedure) for removal of
dissolved gas (oxygen and carbon dioxide) in pure water.

３１

４. Operation Method

Display of Water Quality

About TOC

 TOC stands for “Total Organic Carbon.”

TOC represents contamination of the water by means of the amount of carbon contained in
organics in wate. Of carbon compounds dissolved in water, the TOC value may be used to
represent the total amount of carbon in organic compounds.

 For the A4 water specified in JIS, this is 50ppb or less.（JIS K 0557）
 For measurement, the UV oxidation + direct conductivity measurement methods are used. The UV

oxidation conductivity measurement method consists of measurement of the conductivity before
and after organic decomposition and of calculation of TOC as the decomposition product from the
difference.

TOC units: [mgC/L]､ [μgC/L]､ [ppm]､ [ppb]

1[mgC/L]＝1000[μgC/L]＝1[ppm]＝1000[ppb]

To obtain the repeatability of analytical result in the experiment, it is essential to use the super
pure water of certain water quality. To check the water quality, it is necessary to control the
water quality by means of “electric conductivity” and “TOC value.”

Item

Water quality standard（JIS K 0557）

A1

A2

A3

A4

Total organic carbon（TOC）
mgC/l

1 or less

0.5 or less

0.2 or less

0.05 or less
Conductivity mS/m (25℃)

0.5 or less

0.1 or less

0.1 or less

0.1 or less

Zinc μgZn/l

0.5 or less

0.5 or less

0.1 or less

0.1 or less

Silica μgSiO2/l

-

50 or less

5.0 or less

2.5 or less

Chloride ion μgCl-/l

10 or less

2 or less

1 or less

1 or less

Sulfate ion μgSO

4

2-

/l

10 or less

2 or less

1 or less

1 or less

 In the case of WG270 the quality of distilled water stored in the distilled water tank may be

worse than the A4 level quality temporarily because of contact with the atmospheric air.
WG270 is equipped with the function to recover the water quality of such pure water to
the A4 level by means of circulation under ultraviolet ray irradiation and removal of CO2
gas.

 It may take hours for the distilled water stored in the tank after initial start of WG270 to

reach the A4 level water quality. Carry out cleaning of the tank inside as follows:
(1) Install and start operation of WG270 system. Keep operation till the tank is filled with

the distilled water.
(2) Discharge the distilled water totally from the outlet of distilled water tank.
(3) Start operation again and keep operation till the tank is filled with the distilled water.
(4) When the tank is full of the distilled water, continue operation without turning OFF

power supply (keep the distilled water circulating). In four or more hours, use the

distilled water. (This step is necessary for initial operation only).

 A guideline is as follows. If the specific resistance of distilled water is maintained at 1.2

ＭΩ・cm or more for one hour or more continuously, the distilled water with the A4 level or
higher water quality can always be sampled.
If the specific resistance of distilled water is less than 1.2MΩ・cm, continue operation
(keep the distilled water circulating) for approximately four hours or more before sampling
the distilled water.

 When the distilled water has been stored for two weeks or more in the tank, drain the

water totally and start operation. Take steps (3) and (4) above before using the distilled
water.

３２

４. Operation Method

Setting/Display of Submenu

1. Setting/display of submenu

FILL

CONDUCTIVITY

M F

WATER

LEVEL

MEASURED
CONTINUOUS

FULL

EMPTY

POWER

PURE
WATER

DISTILLED
WATER

Sub-Menu

1.Buzzer

2.Calendar

3.EXCH History

Perform setting/display of submenu.

1. Pressing M key for 2 seconds displays the submenu.

2. Select the item to be set or displayed by pressing ▲▼
key.

3. Pressing M key confirms the setting and shifts to the
selection screen.

 Press F key to (cancel the setting and) return the

previous setting screen.

 If not pressing any keys for 2 minutes, the screen

returns to the previous display before setting/display of
submenu.

Items of submenu are:

1) Buzzer

2) Calendar

3) EXCH History

4) M History

5) Error History

6) Outage History

7) Water Alarm

8) Pump Manual

9) Language

10) Resume FUNC

2. Setting/display of each item

2.1. Setting of ON/OFF of buzzer sound

Buzzer

1. Key Click

2. Error Buzz

To set a key clicking sound/alarm buzzer sound:

1. Select an item of submenu by pressing ▲▼ key.

2. Confirm the item by pressing M key. The selection
screen appears.

3. Specify "ON" or "OFF" of each item by pressing ▲▼
key, and confirm the setting by pressing M key.

4. Pressing F key returns to the submenu screen.

 "ON" is set to buzzer sound at default setting.

2.2. Calendar setting

Calendar
2006 year
9/27 month/day
12:00 h:min

To set the calendar:

1. Set the items (year/month/day/hour/minute)by pressing
▲▼ key.

2. Confirm the setting by pressing M key.

3. The set items are displayed. Check the set items and
confirm your entry by pressing M key to go to the
selection screen.

4. Pressing F key returns to the previous submenu
screen.

②

③

①,③

３３

４. Operation Method

Setting/Display of Submenu

2. Setting/display of each item

2.3. Consumables replacement history

EXCH History

1. Hollow Filter

2. Ion-Exchange N

3. Ion-Exchange H

4. DW M-Filter

5. DI M-Filter

6. MHF

7.TOC-d UV Lamp

For display of the history of the pre-treatment
filter・ion exchange resin（N）・
Ion exchange resin （H）・ distilled water M filter・

ion change water M filter・deaeration membrane
module

Cautions

1. During distillation and pure water sampling, the supply water circulation solenoid pump is always
running. When the distilled water tank is full, this pump stops. To sample pure water while this
pump is stopped, set this pump normally ON in the sub-menu and sample pure water after
stabilization of the water quality. This pump can be set to normal operation from the sub-menu while
the distillation water tank is full.

2. If the supply water circulation pump has been set to normally ON, its setting is cancelled under
following conditions:

① Power key turned OFF
② Distilled water sampled, the storage tank water level lowering, and distillation resumed
③ Abnormality

When the distilled water tank is full, set the supply water circulation pump to “Normally ON” according to
Setting and Displaying Submenu, “2.8 PUMP manual operation” in Page 34.

３４

４. Operation Method

Setting/Display of Submenu

2.4. Maintenance history
Maintenance

History No.1

To display the maintenance history:

1. Confirm the maintenance history by pressing ▲▼ key.

2. Pressing F key returns to the previous screen.

 Up to 20 records are displayed for each change history.

If it exceeds 20 records, the oldest record is deleted.

2.5. Error occurrence history

Error History
History No.1
Leak error
2005/09/29 12:25

To display the error occurrence history:

1. Confirm the maintenance history by pressing ▲▼ key.

2. Pressing F key returns to the previous screen.

 Up to 20 records are displayed for each change history.

If it exceeds 20 records, the oldest record is deleted.

 For details of error alarms, refer to page 47.

2.6. Power failure occurrence history
Outage History

History No.1

↓05/09/29 12:25
↑05/09/29 12:30

To display the power failure occurrence history:

1. Confirm the maintenance history by pressing ▲▼ key.

2. Pressing F key returns to the previous screen.

 Up to 20 records are displayed for each change history.

If it exceeds 20 records, the oldest record is deleted.

2.7. Water cutoff occurrence history
Water Alarm

History No.1

↓05/09/29 12:25
↑05/09/29 12:30

To display the water cutoff occurrence history:

1. Confirm the maintenance history by pressing ▲▼ key.

2. Pressing F key returns to the previous screen.

 Up to 20 records are displayed for each change history.

If it exceeds 20 records, the oldest record is deleted.

2.8. Pump manual operation
Pump manual

1.RUN

2.Cancel

To set the pump manual operation,

1. Select the submenu item to be set with ▲and ▼ keys.

2. Acknowledge with the M key and return to the submenu

screen.

（Effective only when the distilled water tank is full）

2.9. Language selection
Language

1. English

2. Japanese

To select display language:

1. Select an item of submenu by pressing ▲▼ key.

2. Confirm the item by pressing M key. The submenu

screen appears.

2.10. Power failure recovery function
Resume Function

1. No

2. Yes

To set the power failure recovery:

1. Select an item of submenu by pressing ▲▼ key.

2. Confirm the item by pressing M key. The submenu

screen appears.

 This function is set to "invalid" at default setting.

3. Finishing of setting/display

Press M key for 2 seconds.
The screen returns to the previous display before
setting/display submenu.

３５

5. Handling Precautions

WARNING!

1. If a problem occurs

 If smoke or strange odor should come out of this unit for some reason, turn off the power

key right away, and then turn off the circuit breaker and the main power. Immediately
contact dealers or Yamato Scientific Co., Ltd. sales office for inspection. If this procedure is
not followed, fire or electrical shock may result. Never perform repair work yourself, since it
is dangerous and not recommended.

2. During a thunder storm

 During a thunderstorm, turn off the power key immediately, then turn off the circuit breaker

and the main power.

 If this procedure is not followed, fire or electrical shock may be caused.

3. Take enough care in handling detergent (liquid)

 In storing detergent (liquid), store in enclosable container avoiding high temperature and

humidity.

 Principal component of detergent (liquid) Orgazor 10 is sulfamic acid (acidic with pH of

water solution approx. 1).

 In handling this detergent (liquid), use protective tools (gloves, mask, and glasses).
 When it is in contact with human body, wash it away with clean water.
 Neutralize the liquid with neutralizer (such as sodium hydroxide) after washing.
 Ensure neutralization with pH test paper, etc.
 Do not use empty container for beverage.
 Do not allow detergent to directly flow into agricultural irrigation canal or fields because it

causes withering of rice crop.

4. Do not step on this unit

 Do not step on this unit. It will cause injury if this unit fall down or break.

5. Do not put anything on this unit

 Do not put anything on this unit. It will cause injury if fall.

6. In power failure (Factory setting :no power failure recovery function)

When system has halted during operation due to power failure etc. and is provided with power again,
system is brought to standby status. When restarting operation, start from (Page 24 "1. Turning on
power ").

7.Do not look directly into the TOC reduction UV lamp while this lamp is ON.

While the TOC reduction system is operating, the TOC reduction UV lamp may go ON if the specific
resistance of the distilled water in the tank increases to 1.05ＭΩ・cm or more. Never look directly
into the UV lamp when opening the front door of this instrument.
When replacing consumables, turn OFF the circuit breaker beforehand.

３６

6. Maintenance Method

Inspection and Maintenance

Timing of maintenance and inspection
(Perform daily inspection for stable use of product.)

Maintenance/check

items

Reference for timing

Remarks

Replacement of
pre-treatment cartridge

Approx. 6 months

Exchange message appears

on the indication area.

Throughput: About 5000 liters of city water in
Tokyo.
If the quality of raw water is not good, perform
this maintenance as soon as possible.

Replacement of
membrane filter

Approx. 3 months

Exchange message appears

on the indication area.

Throughput: approx. 1500 liters for pure
water.
Need to exchange if the amount of collection
is less than the above value.

Replacement of ion
exchange resin cartridge
CPH-N

Exchange message appears

on the indication area.

(Displayed when the

conductivity of pure water is

more than 1 x 10-4S/m.)

Throughput: About 600 liters with the raw
water of 200 x 10-4S/m.

Replacement of ion
exchange resin cartridge
CPC-H

Exchange message appears

on the indication area.

(Displayed when the

conductivity of pure water is

more than 0.2 x 10-4S/m.)

Throughput： about 600 liters with the raw
water of 200 x 10-4S/m
By replacing CPC-N, the CPC-H service life
can be extended substantially.。

Replacement of
deaeration membrane
module

About one year

Exchange message appears in

the indication area.

Throughput：Maintains the specific resistance
of distilled water to1.0 MΩ・cm or more

Replacement of TOC
reduction UV lamp

About 4000 hours

Exchange message appears in

the indication area.

Throughput：TOC of the distilled water stored
in the tank may be maintained at 50 ppb or
less (equivalent to A4 water of JIS) for about
week.
If the tank has been left unused for a long
period of time, drain first, and store the
distilled water again before use.

Cleaning of distiller

3 months

If the quality of raw water is not good, perform
cleaning early.

Cleaning of water supply
hose filer

6 months

Replacement of hose

2 years

Connections shall be checked monthly.

Drainage of distilled
water tank

3 months

If not used for a long time, drain water from
the tank.

Inspection of the vacuum
pump

One year

Change the consumable parts.

Replacement of pre-treatment cartridge

See Page 12 “Secure the pre-treatment cartridge securely " for replacement procedure.
When the cartridge is put to use without replacement, life span of ion exchange resin cartridge

becomes short.
Please dispose used cartridge as noncombustible. When it is sent back to our company, fill in the

designated invoice attached to a new cartridge, and send it with the used cartridge to us.

３７

６. Maintenance Method

Replacement of ion exchange resin cartridge

When a cartridge is stored for a long time, deterioration of water quality and fall of processing
capacity are found; therefore prepare a spare cartridge in a planned manner for replacement timing.
Standard for storage is about 4 months.

In replacement, see Page 11 "Install firmly the ion exchange resin cartridge (CPC-N) and high-purity
cartridge (CPC-H)."

When a cartridge is used without replacement, much scale is deposited on boiler and heater, which
causes decrease of distilled water sampling and damage to heater.

Please dispose used cartridge as nonconbustibles. When it is sent back to our company, fill in the
designated invoice attached to a new cartridge, and send it with the used cartridge to us.

We promote the reasonable disposal, collection, and recycling of cartridge for environmental
protection.

※ After replacement of pre-treatment cartridge・membrane filter・ion exchange resin cartridge, and high

purity cartridge, press the reset switch on the backside of front door, with power of the unit ON, for
two seconds. The acceptance sound is issued. Alarm display is reset and registered in the
consumables replacement history.
In case of replacement of multiple components, register one component at a time in the order of
replacement. Note that the history of ion exchange resin cartridge is registered last of all.

(Alarm for ion exchange resin and high-purity cartridges is automatically reset. Pressing the reset

switch causes recording of the replacement history.)

リセットスイッチ

Reset switch

３８

６. Maintenance Method

Washing of Distiller

 Dismounting of Distiller

1. Turn "OFF" the earth leakage breaker of the unit.

2. Close the tap.

3. Check that the boiler is not hot (longer than 30 minutes after the breaker is turned "OFF"), then
open the front door of the unit, and open the boiler water drain cock.

4. Disconnect the hose connected to the boiler ① and condenser ②. In disconnecting from the
distilled water outlet and boiler water supply and drain port, turn the hose band by use of tool
and displace the engaged portion (serrated portion). Take care in disconnecting because
excessive force applied to glass may cause damage.

②

①

5. Disconnect the hole plug at left plate, remove four screws with a screw driver, then remove the
left plate.

6. Loosen 4 screws on the right of terminal block located at the right top of the body frame with left
side plate dismounted by use of Phillips screwdriver, and disconnect the heater lead terminal.

Cooling
water outlet

Cooling water inlet

Distilled
water outlet

Boiler water supply
and drain port

３９

６. Maintenance Method

Washing of Distiller

7.

1) Disconnect the heater lead wire from grommet.
Note that, do not bend or pull the heater lead wire more than necessary.

2) Remove the two screws of boiler securing band with a Phillips screwdriver, and take the boiler
and condenser out of the body.

Grommet

3) Loosen the knurled screws (three) and remove the boiler and condenser.

Grommet

Connecting
Hardware

Packing

Connection Port
with Condenser

Boiler

Condenser

 Washing of boiler

1. Adjust detergent liquid.

1) Prepare approx. 2 liters of hot water at 50 to 60C.

2) Add attached scale detergent (Orgazor) approx. 200g to hot water prepared in 1) and agitate
well.

2. Seal the hose connection port at the bottom of boiler (boiler supply and drain port) by use of
rubber stopper, etc.

3. Secure the boiler at a stable position to prevent washing liquid from spilling.

4. Pour in washing liquid through connection port with condenser with heater turned on.
Most scale is removed in 4 to 5 hours approximately. Drain washing liquid in the boiler. If much
scale is distiller deposited, pour in washing liquid newly, and repeat washing

1) When scale-removing work is finished, take the heater out of boiler and wash each of them

enough with city water. Here, in washing the heater with water, be sure to fill a larger beaker
with water and wash the heater inside so that lead wire and its routing port are not wet by
water.
Avoid washing the heater directly with water from tap.

2) If solid scale distiller remains after washing by washing liquid, follow the remedy below:

Boiler: Scrub with brush etc. for removing.

Heater: Scrub with something soft such as wood piece or plastic.
In this connection, remove scale on the heater uniformly in general, never leaving solid scale in part.
In an extreme case, only such part has a great heat resistance, causing damage to the heater.

Knurled Screw

４０

６. Maintenance Method

Washing of Distiller

 Washing of Condenser

1. Pour detergent liquid into the cooling pipe of condenser.

(See Page 39 "Washing of boiler" for formulating detergent liquid.)

Detergent
Liquid

Hose
Connection
Port

2. If detergent liquid should flow out of hose connection port, seal with rubber stopper. Most fur can

be removed in 4 - 5 hours approximately.

3. Drain detergent liquid, and then wash enough with city water.

 Handling of Detergent Liquid (also refer to Page 35 "Handling Precautions")

1. Wash the boiler and heater sooner. If the more scale is deposited, the more difficult is its

removal, which may cause decrease of distilled water sampling and damage to heater.

2. When washing is finished, drain detergent liquid out of the unit, and apply neutralization by

neutralizer (such as sodium hydroxide). In neutralization, check that it is neutral by use of pH test
paper, etc. (Principal component of scale detergent: Sulfamic acid and pH of water solution: Acidic
approximately 1)

3. In storing this detergent, seal the agent and store in cold and dark place avoiding high temperature

and humidity.

4. In handling this detergent, be sure to use protective tools (gloves, mask, and glasses).

5. When it is in contact with human body, wash it away with clean water.

6. Do not use empty container for beverage.

7. Do not allow detergent to directly flow into agricultural irrigation canal or fields because it causes

withering of rice crop.

 Installation of boiler

1. Secure the boiler with the boiler securing band so that connection port of condenser is horizontal.

Check that the packing is contained in the cap nut, and then install the heater into the boiler with
letters "YK-W-3" faced up.

Packing

Cap Nut

Heater

Boiler Securing
Band

Connection Port with
Condenser

４１

６. Maintenance Method

Washing of Distiller

2. Attach 4 heater lead terminals to the terminal block.

Heater Lead
(wire diameter, thick)

Heater Lead
(wire diameter, thin)

3. Install the left side plate on the body.

4. Insert the hose to the boiler water supply and drain port, and secure with the hose band.

 Installation of condenser

1. Place packing in the connection port of boiler with condenser, and secure with connecting hardware

so that the boiler and condenser are placed in the same direction.

Inlet

Outlet

Boiler

Condenser

Connecting
Hardware

2. Connect the hose respectively to the cooling water inlet, outlet, and distilled water outlet of

condenser.

3. Close the boiler water drain cock.

View from above

Boiler Water

Drain Cock

Open

Close

４２

６. Maintenance Method

Replacement of Heater

 If the heater should be disconnected or damaged due to deposit of scale, replace it by the

procedure below. (Also refer to Pages 38 to 41"6. Maintenance Method " in working.)

1. Turn "OFF" the earth leakage breaker of this unit.

2. Close the tap.

3. Turn "OFF" earth leakage breaker, and when more than 30 minutes has passed, open the front

door of this unit, and open the boiler water drain cock.

4. Open the left side plate of the body, loosen the four screws on the right of the terminal block, and

disconnect the heater lead terminal.

5. Pull the heater lead out of the grommet.

6. Remove the cap nut of heater, and pull out the heater.

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

8. Install the packing and cap nut on the new heater. At that time, do not touch with bare hand in

order to prevent soiling by hand.

Packing

9. Install on the boiler so that "YK-W-3" mark of the heater is faced up.

10. Feed the heater lead wire through the grommet, check the heater lead wire attaching position, and

secure to the terminal block.

11. Mount the left side plate.

12. Close the boiler water drain cock.

13. Close the front door, and then open the tap.

14. Turn on the earth leakage breaker.

15. The standby screen appears at the display window of the control panel.

16. Perform calibrations by pressing POWER key while holding down PURE WATER key and

DISTILLED WATER key. (Refer to page 24.)
(Calibration is performed for storing the standard temperature of the sensors in each heater under
normal operation in the inner controller. Performing calibration detects errors when the
temperature rises higher than the standard temperature + 20℃.)

17. During calibration, a message is displayed at the message window of the control panel.

18. After approx. 5 minutes passed after starting calibration, normal operation starts automatically.

４３

６. Maintenance Method

Washing of Water Supply Hose Filter

1. After turning off the earth leakage breaker

on this unit, turn the tap off, slide the
sleeve to the direction of the arrow, then,
remove the water supply hose from the
connection port.

2. Remove the plug ② from ring ① as

turning.

3. Cleanse filter ⑦ attached to the packing

with water.

4. Wash the filter with spray, etc.

5. Assemble by reversing the procedure.

Replacement of Hose

 Be sure to use a hose specified by Yamato Scientific for replacement.

Distilled water tank drain method

1. Turn OFF the earth leakage breaker of the unit to “OFF.”

2. Take out thr hose in the lower portion on the backside of system.

3. There is a cap at the end of hose. Remove the cap and drain the distilled water tank.

4. When draining is over, be sure to reset the cap firmly. If not firmly provided, the can may

cause water leakage.

Connection Port Body

①Ring
②Plug
③Socket
④Spacer
⑤Mounting Screw
⑥Packing
⑦Filter

One-touch
Joint

④ ⑤ ⑥ ⑦ ①

②

③

Tap

Sleeve

Tap side

Water

Supply

Hose

４４

６. Maintenance Method

Replacing the TOC reduction UV lamp

1. Turn OFF the earth leakage breaker of the unit.

2. Close the tap.

3. Open the door of the main body. (See Photo 1)

Photo １ Photo 2

4. Remove the pre-treatment cartridge and ion exchange resin (CPC-N).

5. Remove a plate fixing the ion exchange resin (CPC-N) and remove a cover plate of the
TOC reduction UV lamp.（See Photos 2 and 3）

Photo 3

6. Remove screws at four points on top of the TOC reduction UV lamp.

7. Raise the socket and remove the lamp.

8. Remove the lamp from the socket.

9. For installation, reverse the above procedure.

（※）Never touch the quartz glass directly during replacement of the UV lamp.

TOC reduction UV lamp unit

Deaeration menbrance module

Vaccum pump for deaeration
menbrance module

４５

６. Maintenance Method

Checking if the TOC reduction UV lamp goes ON

 Checking if the TOC reduction UV lamp goes ON.

Open the front door of the unit. There are the switch to turn ON the TOC reduction
UV lamp of Photo 1 and the TOC reduction UV lamp ON glow on top of the tank.

Normally, the TOC reduction UV lamp does not go ON unless the TOC reduction system
is activated.
Checking of the TOC reduction UV lamp and TOC reduction UV lamp ON glow can be
made with ease by turning ON the TOC reduction UV lamp ON switch.

※ ：The TOC reduction UV lamp ON switch is automatically reset to OFF when

released.

TOC reduction UV
lamp switch

TOC reduction UV
lamp ON glow

４６

６. Maintenance Method

Replacing the deaeration membrane module

1. Turn OFF the earth leakage breaker of the unit.

2. Close the tap.

3. Open the door of the main body. (See Photo 1)

Photo １ Photo 2

4. Remove the pre-treatment cartridge and ion exchange resin (CPC-N).

5. Remove a plate fixing the ion exchange resin (CPC-N).（See Photos 2 and 3）

Photo 3

6. Remove the piping connected to the deaeration membrane module as well as fixing
screws.

7. For installation, reverse the above procedure.

TOC reduction UV lamp unit

Deaeration menbrance module

Vaccum pump for deaeration
menbrance module

４７

６. Maintenance Method

Vacuum pump

1. Maintenance
Check as follows at least once every three days during operation:

(1) Check for any abnormal sound.
(2) Check if the pump is abnormally hot.
(3) Check if exhaust is made correctly.

2. Regular inspection

(1) List of consumables

Parts

Quantity

Material

Reference life

Diaphragm

2

Synthetic rubber (EPDM)

10,000 H

Suction ・ exhaust

valves

4

Synthetic rubber (FPM)

10,000 H

Head gasket

2

Synthetic rubber (EPDM)

10,000 H

Bearing

1 set

10,000 H

(2) Guidelines for replacement

・Diaphragm
Replace when the surface shows fine cracks, wear, hardening, deformation.
・Suction・exhaust valves
Replace if they show any deformation, chipping, bend, etc.
・Head gasket
Replace if it shows any hardening, crack, elongation.
・Bearing
Request repair if grease shortage, abnormal sound, or abnormal motor vibration (chattering)

is detected.

3. Replacing the consumables
Caution：Be sure to turn OFF power supply to the unit before proceeding to replacement of

consumables.
When replacing, refer to the exploded diagram. Depending on the diassembling portion,
special tool may be necessary to handle a part of components.

(a) Replacing the diagram

Remove four cross-recessed pan-head machine screws（M4×12(with SW)）② of the
pump head ①.
Remove the pump head and remove one cross-recessed pan-head machine screw

（M5×12）④ of the diaphragm holding plate ③.

（※）Replace a total of two diaphragms ⑤, one for each pump head, with the new ones.

During reassembly, apply small amount (enough to cover three to four threads at the
end) of an agent to prevent loosening (Locktight 242, etc.) to cross-recessed
pan-head machine screws（M5×12）④. Tighten screws with a torque of 4.0 ～ 4.5

N・m.

４８

６. Maintenance Method

Vacuum pump

(b) Replacing the head gasket

Remove one cross-recessed pan-head machine screw （M4×6）⑦ of head cover ⑥.
There is a black head gasket ⑧ under the head cover. Remove this gasket and replace the
new one.
（※） There are total of two hea gasket ⑧, one for each pump head.

Reassemble the head gasket and head cover in this order to the pump head.また、
During reassembly, apply small amount (enough to cover three to four threads at the
end) of an agent to prevent loosening (Locktight 242, etc.) to cross-recessed
pan-head machine screws（M4x6）. Tighten screws with a torque of 1.2 ～ 1.3 N・m.

(c) Replacing suction・exhaust valves（special tool necessary）

Remove one cross-recessed pan-head machine screw （M4×6）⑦ of head cover ⑥, and
remove the head gasket ⑧.
Remove four cross-recessed pan-head machine screws （M4×12(with SW)）② of the pump
head ①.
Remove the screw（M3×4）⑨ and valve holder ⑩ on both sides of pump head and replace
suction・exhaust valves ⑪.
（※） There are a total of four suction・exhaust valves ⑪, two for each pump head.

During reassembly, apply small amount of an agent to prevent loosening (Locktight
242, etc.) to cross-recessed screws（M3×4）⑨. Tighten screws with a torque of 0.2
～ 0.25 N・m.

Exploded diagram

４９

7. Long storage and disposal

When not using this unit for long term

 If this unit is to be put out of service for a long time, be sure to turn of the earth leakage

breaker of this unit for safety, and close the tap. Water in the boiler and distilled water
tank, if stored as it is, will deteriorate in quality due to generated bacteria or algae. Drain
water by the procedure below:

Boiler Water Drain

1. In draining boiler water, turn off the earth

leakage breaker, ensure that the tap is
closed, then wait for 30 minutes or more,
and open the front door.

2. Open the boiler water drain cock.

3. Make sure that all water in the boiler and

float cylinder is drained.

4. Be sure to close the boiler water drain cock.

If boiler water drain cock is opened in next
use, water is not fed into the boiler, and
distillation is not started.

When the distilled water has been left stored in the tank for two weeks or more, drain the
tank content completely and start operation. Start using the distilled water when the water
is ready for sampling and when the specific resistance becomes 1.2MΩ・cm or more and
after operation for one hour or more.

Close

Boiler Water
Drain Cock

Open

５０

7. Long storage and disposal

WARNING!

1. When disposing…

 Dispose of the unit as bulky waste.

 When disposing, avoid a place visited by playing children frequently.

2. When the unit is out of service at night and on holidays

 Turn off the earth leakage breaker.
 Be sure to close the tap.
 Fluctuation of city water pressure may cause unexpected accident such as water leakage.
 In use in winter at a severely cold place, beware of freezing in the tank, boiler, condenser,

etc. while system is stopped.

Considerations on disposing

Environmental protection should be considered

We request you to disassemble this unit as possible and recycle the reusable parts considering to the
environmental protection. The feature components of this unit and materials used are listed below.

Component Name

Material

Main components of exterior

Exterior

Made of iron, bonded steel plate, melamine resin baking finish

Exterior rear plate

Made of iron, bonded steel plate, melamine resin baking finish

Door

Made of iron, bonded steel plate, melamine resin baking finish

Door rear plate

Stainless steel plate SUS 304

Mounting plate (painted)

Made of iron, bonded steel plate, melamine resin baking finish

Mounting plate (unpainted)

Stainless steel plate SUS 304

Electric parts mounting plate

Aluminum

Hinge

Stainless steel plate SUS

Rubber foot

Synthetic rubber

Mounting tabs

Stainless steel plate SUS 304

Production plates

Polyester

Main components of water circuit system

Boiler

Hard glass

Condenser

Hard glass

Float cylinder

Polypropylene

Pure water tank

Polyethylene

Drain port

Polypropylene

Float cylinder branch pipe

Polypropylene

Electrode holder

Polypropylene

Water sampling port

Polypropylene

Control panel

ABS resin

Water sampling table

ABS resin

５１

7. Long storage and disposal

Considerations on disposing

Component Name

Material

Main components of water circuit system

Resin cylinder case

Polypropylene

Ion exchange resin

Polystyrene Resin

Water quality gauge electrode

Titanium

Heater

Ceramic

Heater mounting nut

Teflon

TOC holder

Hard glass

UV lamp

Hard glass

Hard tube

Hard glass

TOC holder cover

Polyethylene

Deaeration membrane module

Polycarbonate

Main components of piping system

Water supply hose

Vinyl chloride

Drain hose

Ethylene propyne

Hose (transparent)

Vinyl

Hose (milky transparent)

Silicon

Hose clamp

Polyacetal

Hose nipple (resin black)

Polyamide

Hose nipple (resin white)

Polypropylene

Hose nipple (metal)

Brass

Main components of electric system

Pump

Casing: Polypropylene
Impeller: Polypropylene
Magnet: Ferrite magnet
Motor case: Iron
Rotor: Iron

Solenoid Valve

Made of metal: Body, brass
Made of resin: Body, polyacetal

Float Switch

Polypropylene

Power Cord, Wiring Material, etc.

Wiring material and board coated by synthetic rubber and resin

５２

8. In the Event of Failure…

Failure indication and Its Contents

Alarm

Indication

Condition

Corrective measures

Water cutoff
alarm

Feed Water Alarm

Check

Flow & Pressure

When raw water pressure
decreases (＜0.5kg f/cm2),
or when water cutoff
occurs

Check raw water.

Pretreatment
filter exchange
notification

It's time
to exchange
Hollow Filter

When 6 months passed
under continuous
energizing condition

Change the pretreatment
filter.
Press and hold the reset
switch on backside of the
door till a beep is heard.
Then, the alarm indication is
reset.

Ion-exchange
resin CPC-N
exchange
notification

Water Quality NG

It's time
to exchange

Ion-EXCH Resin-N

When the conductivity of
pure water exceeds
1×10-4 S/m

Change the ion-exchange
resin.
Press and hold the reset
switch on backside of the
door till a beep is heard.
Then, the alarm indication is
reset.

Ion-exchange
resin CPC-H
exchange
notification

Water Quality NG

It's time
to exchange

Ion-EXCH Resin-H

When the conductivity of
pure water exceeds

0.2×10-4 S/m

Change the ion-exchange
resin.
Press and hold the reset
switch on backside of the
door till a beep is heard.
Then, the alarm indication is
reset.

Membrane filter
for distilled
water exchange
notification

It's time
to exchange

Distilled Water

Membrane Filter

When 3 months passed
under continuous
energizing condition

Change the membrane filter
for distilled water.
Press and hold the reset
switch on backside of the
door till a beep is heard.
Then, the alarm indication is
reset.

Membrane filter
for pure water
exchange
notification

It's time
to exchange

Ion-EXCH Water

Membrane Filter

When 3 months passed
under continuous
energizing condition

Change the membrane filter
for pure water.
Press and hold the reset
switch on backside of the
door till a beep is heard.
Then, the alarm indication is
reset.

TOC reduction
UV lamp
exchange
message

It’s time

to exchange

TOC-d UV Lamp.

When concecutive power
application hours of 4000
hours have passed

Replace the TOC reduction
UV lamp.
Keep pressing the reset
switch on the door backside
for an extended period of
time. The confirmation
sound is issued and the
alarm display is reset.

５３

８. In the Event of Failure…

Failure indication and Its Contents

Deaeration
membrane
module
exchange
message

It’s time

to exchange

MHF

When concecutive water
supply of one year has
passed

Replace the deaeration
membrane module.
Keep pressing the
reset switch on the
door backside for an
extended period of
time. The
confirmation sound is
issued and the alarm
display is reset.

Maintenance time
notification

It's time

to maintenance

Service Call

When 3 years passed under
continuous energizing
condition

Perform maintenance
of the unit.
Press and hold the
reset switch on
backside of the door till
a beep is heard. Then,
the alarm indication is
reset.

５４

８. In the Event of Failure…

Failure indication and Its Contents

Error

Indication

Cause

Symptom

Countermeasur

e

Controller

error

Controller Error

Service Call

When the setting value which
is memorized in the memory
chip cannot be read properly,
or when an abnormal value
is displayed

All controls
of the heater
and solenoid
valve are
turned OFF.

Turn the breaker
on again. If the
trouble persists,
please call our
customer
service center.

Water

leakage

error

Leak Error

Service Call

When the resistance value of
the water leakage sensor
input becomes less than the
water leakage error judgment
value

Turn the breaker
off and check
the piping parts.
For details, refer
to page ５６.

Overheat of

heater

Over Heat Error

Service Call

When temperature at the
heater excesses the error
judgment value, or when
breakage or shortage occurs
on the temperature sensor

Change the
heater.

Burnout of

heater

Heater Error

Service Call

When temperature of the
heater did not rise after
certain time passed during
distillation

Change the
heater.

Tank water
level meter

error

Tank Water

Sensor Error

Service Call

When the condition of the
float contacting points in the
tank water level meter
becomes abnormal

Change the float
switch.

Pure water

conductivity

meter (N)

error

Ion-Exchange-N

Sensor Error

Service Call

When the state of breakage
or shortage of the thermistor
sensor for pure water
conductivity gauge continues
longer than error judgment
time

Change the pure
water
conductivity
sensor.①

Pure water

conductivity

meter (H)

error

Ion-Exchange-H

Sensor Error

Service Call

When the state of breakage
or shortage of the thermistor
sensor for pure water
conductivity gauge continues
longer than error judgment
time

Change the pure
water
conductivity
sensor.②

Distilled

water

conductivity

meter error

Distilled Water

Sensor Error

Service Call

When the state of breakage
or shortage of the thermistor
sensor for distilled water
conductivity gauge continues
longer than error judgment
time

Change the
distilled water
conductivity
sensor.

５５

８. In the Event of Failure…

Failure indication and Its Contents

Others

Indication

Cause

Symptom

Countermeasure

Boiler drain
error

Boiler Water

Waste Error
Service Call

When the heater
operation water level
input kept OFF even if
the time for required
to evaluate the boiler
water level error
passed after starting
water supply to the
boiler

All controls of the

heater and

solenoid valve

are turned OFF.

Check the
solenoid valve for
drain and drain
path.

Coolant error

A Coolant Error

Service Call

When the state that
became boiler water
overflow input ON in
the float pipe
continued longer than
coolant error
judgment time

Check the
coolant solenoid
valve and the
coolant path.

Water level
error of boiler

Boiler Water

Level Error

Service Call

When the heater
operation water level
input kept OFF even if
the time for required
to evaluate the boiler
water level error
passed after starting
water supply to the
boiler

Check the
feedwater
solenoid valve
and feedwater
path whether
manual drain
cock is opened or
not.

Water level
meter of
boiler error

Boiler Water

Sensor Error

Service Call

When the condition of
the float contacting
points in the float pipe
becomes abnormal

Change the float
switch.

Circulation
pump error

PUMP Erroe

Service Call

When the time has
elapsed for the period
necessary to
determine error
during ion water
circulation

Turn ON the
breaker again
and sample the
ion water for
about one
minute.
If error cannot be

canceled,
request repair.

Distilled
water
sampling
pump error

DW PUMP Error

Service Call

When the time has
elapsed for the period
necessary to
determine error
during sampling of
distilled water

Check the
distilled water
pump and the
sampling route.
Check the
membrane filter
for clogging. If
error cannot be
canceled, request
repair.

 When an error occurs, confirm the error message shown at the message window, and call the shop from

which you made a purchase or our customer support center.

５６

８. In the Event of Failure…

Remedy for Trouble

Countermeasure against water leakage error

1. Turn off the earth leakage breaker at left surface of the main unit.

2. After repairing the defective area, wipe water off at the bottom in the unit, and dry thoroughly for
re-starting the operation.

3. If the electrode is removed, make sure to reinstall it.

4. Close the door.

5. Turn on the earth breaker, and press POWER key. Now the defect is repaired, and the unit starts
normal operation.

<How to remove the lower front panel of WG270>

1. Remove the screws at left/right positions of the lower front panel.

2. Pull the panel frontward. Be careful of the cable of the drain switch specially used for water
sampling table.

3. Disconnect the cable of the drain switch for water sampling table. Then, remove the lower front
panel. For installation, perform the above steps in reverse order (from 3 to 1).

Water leakage detection electrode

５７

８. In the Event of Failure…

Trouble Shooting

When a trouble occurs

Condition

Check the following

Water is not supplied.

 Defect of raw water supply solenoid valve.
 Insufficient city water pressure or water failure.
 Defect of pressure switch.
 Clogging of pre-treatment cartridge.

Water supply does not
stop.

 Defect of float switch.
 Defect of raw water supply solenoid valve.

No water is supplied to
boiler.

 Defect of boiler water supply solenoid valve.
 Defect of float switch.
 Clogging of pre-treatment cartridge.
 Opened boiler water drain cock.

Heater does not turn on.

 Defect of float switch.
 Break in heater.

Cooling water does not
flow.

 Defect of cooling water solenoid valve.

The initial accumulated
water is not drained.

 Initial boiled water is not drained.

Distilled water is not
accumulated.

 Defect of initial boiled water drain solenoid valve.
 Defect of piping.

Distilled water is not
stored.

 Defect of float switch.

Water is not sampled.

 Defect of Ion exchanged water/Distilled water sampling solenoid valve.
 Defect of distilled water sampling pipe.
 Defect of piping.

Measures in emergency

Error indications/causes

This unit has a self-diagnosis function. When a trouble occurs during operation, or when a failure
occurs on the unit, an error message is displayed on the control panel. Turn off the earth leakage
breaker when an alarm occurs, close the tap.

For details of error indications, refer to "Failure indication and Its Contents (pages 52 and 55)".

Measures

When the following error signs appear, memorize the sign and turn the tap off immediately. If an
error occurs, part change or unit check becomes required. Please call the shop from which you
made a purchase or our customer support center. In that case, please notify them of the error sign.

５８

9. After-sales Service

When requesting the repair

Guarantee card (attached separately）

If any error should occur, record the
error message and stop operation
immediately. Turn OFF power supply
and unplug the power cord from the
receptacle. Then contact the shop
from which you have purchased the
product or our office.

(Data necessary for information)

● Product type name

● Serial No.

● Year/month/day of purchase
※ Check to find the date in the guarantee

card or the nameplate attached to the

unit. (See “Description and Function of

Each Part” in pages 13 and 14.)

● Contents of trouble (as detailed as
possible）

● Be sure to present the guarantee card
when our service personnel visits your
site.

● The guarantee card will be delivered from the
shop from which you have purchased our product
or our office. Confirm that the shop name and the
date of purchase are entered and read the card
carefully. Keep the card with care.

● The guarantee period is one year from the “date

of purchase.” Free repair may be available

according to the content of the card.

● For repair after expiration of the guarantee period,
consult the shop from which you have purchased
our product or our office. If the repair can help
maintaining the function, we will provide the repair
service with charge if so requested by the
customer.

Minimum hold period of performance parts

for repair

The minimum holding period of repair parts for

this unit is seven years after termination of the
production. Repair parts mean those
necessary to maintain the performance of the
product.

５９

10. Specifications

Model

WG270

Feedwater method

One-touch coupler connecting resin hose/free hose connecting

Drain method

Left/right selection connecting method/hose connecting

Performance

Purified water

Distilled water/Ion exchange water

Production of distilled water

Approx. 1.8 L/h

Collection of distilled water

0.5 to 1.0 L/min

Collection of ion exchange
water

0.5 to 1.0 L/min

Setting range of capacity

0.1 to 20 L

(Measured amount/continuous water collection)

Configuration

Condenser

Super hard glass

Heater

Ceramic heater

1.4kW

Raw water side filter

Pre-treatment cartridge (PWF-1),

Activated carbon + Hollow yarn film 0.1μm

Ion exchange resin
cartridge

Ion exchange resin cartridge (CPC-N)

High-purity catrige (CPC-H)

Membrane filter

0.1μm×2

Water leakage detection

Water leakage detector forcefully shut off the feedwater solenoid valve

when water leakage is detected.

Distilled water storage tank

20 PE tank

Water sampling table

Slide-out type

Load-bearing capacity:10kg

For 5 beaker with handle

Water level detection

Lead switch, five level detection (also used for distillation control

function)

Standard

Raw water pressure range

0.5 to 5×100 kPa (0.5 to 5 kgf/cm2)

Ambient temp.

5℃～35℃

Power supply (50/60 Hz)

220V AC 7A

External dimension

(*1)

(Width X Depth X Height)

600×660×780 mm

Weight

Approx.55 kg

Accessories

WG270 : Water supply hose (with connection port), drain hose

assembly, and connection hose 1 respectively
Operation manual: This manual
Guarantee card: 1
Hose clamp: 1
Scale washing agent (1kg): 1
Pre-treatment cartridge: 1
Ion exchange resin cartridgeCPC-N: 1
High-purity catrige CPC-H: 1
Sealing tape: 1
Membrane filter: 2

＊ １The protrusion area is not included in the outside dimension.

６０

11. Wiring Diagram

WG270

６１

11. Wiring Diagram

WG270

Symbol

Part name

Symbol

Part name

ELB

Earth leakage breaker

X

Main relay

T1,T2,T3

Terminal block

MV1

Raw water solenoid valve

H

Heater

MV2

Boiler water supply solenoid valve

OH

Temperature sensor

MV3

Cooling water solenoid valve

E1

Distilled water quality gauge

MV4

Initial accumulated water drain
solenoid valve

E2

Ion exchange water quality
gauge CPC-N

MV5

Boiler drain solenoid valve

E3

Ion exchange water quality
gauge CPC-H

MV6

Distilled water sampling solenoid
valve

WL

Water leakage detector

MV7

Ion exchange water sampling
solenoid valve

FL1

Distilled water flow gauge

MV9

Three-way solenoid valve for
vaccum

FL2

Ion exchange water flow gauge

P1

Distilled water circulation/sampling
pump

Fs-1

Control float switch

P2

Deaeration membrane vacuum
pump

Fs-2

Control float switch

P3

Ion water circulation pump

Fs-3

Tank water level float switch

UV

TOC reduction UV lamp

SW1

Reset switch

UV-B

Ballast

SW2

Drain switch

UV-G

Glow

SW3

UVlamp turn-on switch

PIO

Display board

Ps

Pressure switch

CONT

PLANAR board

SSR

Solid state relay

TF

Transformer

６２

12. Replacement Parts List

WG270

Symbol

Parts

Code No.

Specifications

Manufacturer

ELB

Earth leakage breaker

2060050002

BJS2032N 20A

Panasonic

T1

Terminal board

LT00035672

MKH-250ABC-4P

Terminal

T2

Terminal board

A0050115

TB-20C 4P

Sakazume

Electric

T3

Terminal board

LT00035673

MKH-250ABC-5P

Terminal

H，OH

Heater (temperature
sensor)

2420016003

YK-W-3

Kowa Dennetsu

E1

Distilled water quality
meter

1011890001

For WG252/220

Yamato Scientific

E2,E3

Pure water quality meter

5130000001

For WG240/260

Yamato Scientific

Fs-1

Float switch for control

LT00014440

WA050514-1

Yashima Sokki

Fs-2

Float switch for control

LT00014441

WA050514-2

Yashima Sokki

Fs-3

Tank water level float
switch

LT00019425

YF4-2040

Yashima Sokki

SW1

Reset switch

2010010014

A2A-4W

Omron

SW2

Drain switch

LT00014520

AH164-LS1 1H1

Fuji Electric

SW3

UV lamp ON switch

LT00023393

M-2025

Nihon Kaiheiki

X

Main relay

2050000056

G7L-1A-TUB 100V

Omron

MV1

Raw water solenoid
valve

LT00014451

AG3X-A300-100V

CKD

MV2

Boiler water supply
solenoid valve

LT00014450

J241-811

CKD

MV3

Cooling water solenoid
valve

LT00014453

AB2X-1242

CKD

MV4

Initial distilled water
drain solenoid valve

A0060104

J241-120

CKD

MV5

Boiler drain solenoid
valve

A0060109

J244-023

CKD

MV6

Distilled water sampling
solenoid valve

A0060104

J241-120

CKD

MV7

Pure water sampling
solenoid valve

A0060104

J241-120

CKD

MV9

Three-way solenoid
valve for opening to the
atmosphere

LT00014451

AG3X-A300-100V

CKD

P1

Distilled water sampling
pump

LT00005462

MD-20RZ-N

Iwaki

P2

Deaeration membrane
vacuum pump

LT00019426

DAP-6D

Ulvac

P3

Ion water circulation
pump

LT00035062

WP-LM9 YR-2 (100V)

Iwaki

WL

Water leakage sensor

WG55005328

Lead wire 2,7m

Yamato Scientific

SSR

Solid state relay

2160000035

TRS5225

Toho

Ps

Pressure switch

2040040001

ST-B-BR1-N2

Sanyo Keiki

PIO

Display board

LT00019738

WG270

Yamato Scientific

CONT

Planer board

LT00013591

WG250

Yamato Scientific

FL1

Distilled water flow
meter

1260010005

FHK-33

Yamato Scientific

６３

12. Replacement Parts List

FL2

Pure water flow meter

1260010005

FHK-33

Yamato Scientific

UV

TOC reduction UV
lamp ﾟ

LT00019420

SGL-180T4U Z

Nippo Electric

UV-B

Stabilizer

LT00019424

FBAB-11L-US9

NEC

UV-G

Glow

LT00024700

FE-7E/X

Matsushita

Electric Works

TF

Transformer

2180020010

AD21-02KB2

Toyozumi

６４

13. Consumable parts

WG270

Parts

Replacement timing

Quantity

Pre-treatment cartridge

About 6 months

1

Ion exchange cartridge(CPC-N)

About 600 liters

1

Ion exchange cartridge(CPC-H)

About1200 liters

1

Distilled water membrane filter

About3 months

1

Pure water membrane filter

About3 months

1

Deaeration membrane module

About1 year

1

Consumables of vacuum pump

10000 hours

1.Diaphragm

2

2.Suction･exhaust valve

4 3.Head basket

2

4.Bearing

1

TOC reduction UV lamp

About4000 hours

1

Glow

About1 year

1

６５

14. List of Dangerous Substances

Never process any explosive, flammable samples and also samples contained
with those substances.

Explosive

Substance

①Nitroglycol, Glycerine trinitrate, Cellulose Nitrate and other explosive nitrate

esters

②Trinitrobenzen, Trinitrotoluene, Picric Acid and other explosive nitro compounds

③Acetyl Hydroperoxide, Methyl Ethyl Ketone Peroxide, Benzoyl Peroxide and other

organic peroxides

④Metallic Azide, including Sodium Azide, etc.

ExplosiveSsubstanc

es

①Metal “Lithium” ②Metal “Potassium” ③Metal “Natrium” ④Yellow Phosphorus
⑤Phosphorus Sulfide ⑥Red Phosphorus⑦Phosphorus Sulfide
⑧Celluloids, Calcium Carbide (a.k.a, Carbide)⑨Lime Phosphide⑩Magnesium

Powder
⑪Aluminum Powder ⑫Metal Powder other than Magnesium and Aluminum

Powder
⑬Sodium Dithionous Acid (a.k.a., Hydrosulphite)

Oxidizing Substances

①Potassium Chlorate, Sodium Chlorate, Ammonium Chlorate, and other chlorates

②Potassium Perchlorate, Sodium Perchlorate, Ammonium Perchlorate, and other

perchlorates

③Potassium Peroxide, Sodium Peroxide, Barium Peroxide, and other inorganic

peroxides

④Potassium Nitrate, Sodium Nitrate, Ammonium Nitrate, and other nitrates

⑤Sodium Chlorite and other chlorites

⑥Calcium Hypochlorite and other hypochlorites

Flammable Substances

①Ethyl Ether, Gasoline, Acetaldehyde, Propylene Chloride, Carbon Disulfide, and

other substances with ignition point at a degree 30 or more degrees below zero.

②n-hexane, Ethylene Oxide, Acetone, Benzene, Methyl Ethyl Ketone and other

substances with ignition point between 30 degrees below zero and less than
zero.

③Methanol, Ethanol, Xylene, Pentyl n-acetate, (a.k.a.amyl n-acetate) and other

substances with ignition point between zero and less than 30 degrees.

④Kerosene, Light Oil, Terebinth Oil, Isopenthyl Alcohol(a.k.a. Isoamyl Alcohol),

Acetic Acid and other substances with ignition point between 30 degrees and less
than 65 degrees.

Combustibl

e Gas

Hydrogen, Acetylene, Ethylene, Methane, Ethane, Propane, Butane and other
gases combustible at 15℃ at one air pressure.

(Quoted from the separate table 1 in Article 6, the enforcement order of the Industrial Safety and

Health Law)

Responsibility

Please follow the instructions in this document when using this unit. Yamato
Scientific has no responsibility for the accidents or breakdown of device if it is used
with a failure to comply.
Never conduct what this document forbids. Unexpected accidents or breakdown may
result in.

Note

◆ The contents of this document may be changed in future without notice.

◆ Any books with missing pages or disorderly binding may be replaced.

Instruction Manual for
Water Purifier, Super Auto Still

Model WG270
First Edition June 1, 2017

Yamato Scientific America Inc.

925 Walsh Avenue, Santa Clara, CA 95050
Phone: [phone]

http://www.yamato-usa.com