Yamato WG270 User 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
Varioussymbols are used in thissafety 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 warningsand cautions in thismanual 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 fatality.
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 symbol.
This symbol indicates items that are strictly prohibited.
A detailed message is shown adjacent to the symbol 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,
disconnectthe
powerplug
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 100Ωor 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 ③on 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 ②from the ring ①.
3. Tighten the 4 mounting screws ⑤uniformly while pressing the ring ①slightly and
uniformly to make the packing ⑥in 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 ②clockwise to tighten securely. This will allow the tap and connection port
to be sealed by packing ⑥.
5. Insert the socket ③securely to the plug ②with 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 ⑨securely to
the plug ⑧on 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
INOUT
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 ①out of attachments to the body.
3. Inlet and outlet of the pre-treatment cartridge ①are 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 coupler②there 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 ③of
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.
（1）Take out two membrane filters and seal tape from among accessories of the main body.
（2）Pay attention to the direction of arrow mark on the membrane filter. Wind the seal tape
clockwise as viewed from the tape windind side two to three turns while pulling the tape
slightly. Remaining tape should be cut away.
（3）Screw the membrane filter, with the seal tape applied side on the top side, while taking
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)
（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.
①When the tank is filled to capacity (Distillation is not operated.)
②When drawing pure water
③While standby time (the breaker is turned on, and POWER key is turned off.)
Drain switch for
water sampling table
Water sampling table