Yamato WG 1000 User manual

Water Purifier, Auto Still
Model
WG 250/1000
Instruction Manual
- Fourth Edition -
Yamato Scientific Co. LTD.
This paper has been printed on recycled paper.
zThank you for purchasing "Auto Still, WG
series" of Yamato Scientific Co., Ltd.
zTo 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 usin
g
this unit.

Contents
Cautions in Using with Safety................................................................1
•Explanation.................................................................................................................... 1
•Table of Illustrated Symbols .......................................................................................... 2
•Fundamental Matters of "WARNING!" and "CAUTION!" ............................................... 3
Before Using this unit.............................................................................4
•Requirements for Installation......................................................................................... 4
Description and Function of Each Part...............................................13
•Main Unit ..................................................................................................................... 13
•Water Sampling Table and Multi-Purpose Distilled Water Sampling Port.................... 15
•Piping System View..................................................................................................... 16
•Principle of Operation.................................................................................................. 17
•Control Panel............................................................................................................... 20
Operation Method .................................................................................21
•Setup and Check before Use ...................................................................................... 21
•Operation Procedure ................................................................................................... 22
•Sampling of Pure Water .............................................................................................. 23
•Collection of Measured Amount of Pure Water ........................................................... 24
•Collection of Measured Amount of Distilled Water ...................................................... 25
•Display of Water Quality.............................................................................................. 27
•Setting/Display of Submenu........................................................................................ 29
Handling Precautions ...........................................................................31
Maintenance Method.............................................................................32
•Daily Inspection and Maintenance .............................................................................. 32
•Washing of Distiller...................................................................................................... 33
•Replacement of Heater ............................................................................................... 37
•Washing of Water Supply Hose Filter.......................................................................... 38
•Replacement of Hose.................................................................................................. 38
Long storage and disposal...................................................................39
•When not using this unit for long term / When disposing ............................................ 39
In the Event of Failure….......................................................................42
•Failure indication and Its Contents .............................................................................. 42
•Remedy for Trouble..................................................................................................... 45
•Trouble Shooting ......................................................................................................... 46
•Measures in emergency .............................................................................................. 46
After Service and Warranty ..................................................................47
Specification..........................................................................................48
Wiring Diagram......................................................................................49
•WG250 ........................................................................................................................ 49
•WG1000 ...................................................................................................................... 50
Reference...............................................................................................51
•List of Dangerous Substances .................................................................................... 51

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 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
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
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 51 "List of Dangerous Substances".)
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
Before Using this unit
Requirements for Installation
WARNING!
1. Always ground this unit
•Connect the power plug to a receptacle with grounding connectors.
•Do not forget to ground this unit, to protect you and the unit from electrical shock in case of
power surge. Choose a receptacle with grounding connectors as often as possible.
•Do not connect the grounding wire to a gas pipe, or by means of a lightning rod or telephone
line. A fire or electrical shock will occur.
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.
10cm or more
Front side
10cm or more
10cm
or more
10cm
or more
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 51
"List of Dangerous Substances".)

5
Before Using this unit
Requirements for Installation
4. Do not modify
•Never disassemble this unit.
•This unit has high voltage inside in some
portion, which may cause electric shock.
Contact dealers or Yamato Scientific Co., Ltd.
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.
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 WG250 weighs 55kg gross, and the
unit WG10000 weights 105kg gross. Two or
more persons are required for carrying or
setting these units. Specially be careful for
carrying WG1000 because its location of the
center of gravity is high.
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: WG250: 100V AC Single phase 15A
WG1000: 200V AC Single phase 20A
7. 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.

6
Before Using this unit
Requirements for Installation
8. Connection of power cord
•Always ensure that breaker on power unit side is "Off" before connecting power cord. Power
plug of WG250 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.
9. Connect the water supply hose securely
•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.
•Take the connection port body and supply hose out of attachments to the unit. Install the unit
on a horizontal and stable place nearby tap and sink.
10. 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.
WG250
WG1000
Tap
Connection
port body
Socket on
connection
port side
Water supply
hose
Water supply port
Sleeve on water
supply port
Water supply port
Sleeve on water
supply port
Connection Port Body
①Ring
②Plug
③Socket
④Spacer
⑤Mounting Screw
⑥Packing
⑦Filter
One-touch
Joint
④
⑤
⑥
⑦
①
②
③
Tap
Sleeve
Water supply hose

7
Before Using this unit
Requirements for Installation
11. Observe the specified pressure range of raw water from waterworks
•Apply the range of city water pressure between 0.5 X 100kPa and 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.
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.
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
•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
⑧
⑨
Body side

8
Before Using this unit
Requirements for Installation
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.
For WG1000 unit, be sure to set the hose in the hose holder at the backside plate.
WG1000
WG250
Hose
clamp
Drain port hose
on the main unit
Elbow
Drain hose (accessory)
Hose clamp
Drain port
Drain hose
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 (approx. 2.6 liters/min in WG1000). Also drain
further increases when boiler water is drained, and sufficient drain equipment is required.
Hose holder
WG250
WG1000

9
Before Using this unit
Requirements for Installation
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.

10
Before Using this unit
Requirements for Installation
20. Install the ion exchange resin cartridge (CPC-S) securely
•Install the ion exchange resin cartridge (CPC-S) 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 out of attachments to the unit.
3. Place the ion exchange resin cartridge taken out on the receiver within the unit. (See Fig.1.)
4. Fix the ion exchange resin cartridge with the band of receiver. (See Fig.2.)
5. Remove the rubber cap attached to the inlet and outlet of ion exchange resin cartridge.
6. Fit in the coupler marked with (IN) to the inlet of ion exchange resin cartridge (left) until click is
heard. (See Fig.3.)
7. Fit in the coupler marked with (OUT) to the outlet of ion exchange resin cartridge (right) until
click is heard. (See Fig.3.)
Coupler may be hard at first. When applying force in inserting, do not make it curved because
insertion port may be broken.
IN
Reset switch
INOUT
OUT
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.
9. After changing, turn the breaker on and wait for about ten second, then press and hold the
reset switch till a beep is heard. (See Fig.4.)
Fig.1 Fig.2
Fig.3 Fig.4

11
Before Using this unit
Requirements for Installation
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 coupler; 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 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.5
Fig.6
22. After installation
•This unit may topple over due to unexpected earthquake or shock causing injury. Take an
appropriate measure against toppling for safety.
(For WG1000, earthquake-resistant fittings are optionally available.)
②
①

12
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.

13
Description and Function of Each Part
Main Unit
WG250
Heater
terminal block
Drain cock
Boiler
Leakage detection electrode
Distilled water tank
Ion exchange resin cartridge (CPC-S)
Reset switch
Pre-treatment cartridge
Heater
Water sampling table
Earth leakage breaker
Product number sticker
Drain port
(2pcs each at right/left)
Control panel
Multi-purpose distilled water
sampling port
Distilled water
sam
p
lin
g
p
ort
Ion exchange water
sam
p
lin
g
p
ort
Drain switch for
water sam
p
lin
g
table

14
Description and Function of Each Part
Main Unit
WG1000
Knurled Screw
Pre-treatment cartridge
Ion exchange resin cartridge (CPC-S)
Reset switch
Leakage detection electrode
Water sampling table
Boiler
Heater
Tank
Earth leakage breaker
Drain port
(2pcs each at right/left)
Control panel
Multi-purpose distilled water
sampling port
Drain switch for
water sam
p
lin
g
table
Product number
sticke
r
Leakage detection electrode

15
Description and Function of Each Part
Water Sampling Table and Multi-Purpose Distilled Water Sampling Port
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.)
WG250
WG1000
Multi-purpose distilled water intake opening
The multi-purpose distilled water intake opening is located at right side surface of the unit, and
one-touch joint is installed at the opening. Distilled water in the tank can be filled by removing the plug
stopper, and connect the hard tube ofφ8 of outer diameter. Moreover, the one-touch joint is available
as connection port for optional goods.
Notice that distilled water pours when removing the plug stopper because the one-touch joint
does not have the check valve.
Multi-purpose distilled
water sam
p
lin
g
p
ort
Drain switch fo
r
water sampling table Water sampling table
Water sampling table
Multi-purpose distilled
water sam
p
lin
g
p
ort
Drain switch fo
r
water sampling table

16
Description and Function of Each Part
Piping System View
1 Pressure reduction valve 17 Boiler water supply solenoid valve
2 Pressure switch 18 Initial accumulated water drain
solenoid valve
3 Cooling water solenoid valve 19 Ion exchange water sampling solenoid valve
4 Raw water supply solenoid valve 20 Distilled water sampling solenoid valve
5 Pre-treatment cartridge 21 Ion exchange water flow sensor
6 Ion exchange resin cartridge (CPC-S)
(Two pieces are used for WG1000 type.) 22 Distilled water flow sensor
7 Float cylinder 23 Ion exchange water sampling port
8 Float switch 1 24 Distilled water sampling port
9 Float switch 2 25 Distilled water tank
10 Boiler drain solenoid valve 26 Float switch 3
11 Boiler drain cock 27 Air filter
12 Boiler 28 Distilled water sampling pump
13 Heater 29 Distilled water tank drain port
14 Condenser 30 Multi-purpose distilled water sampling port
15 Ion exchange water quality gauge electrode 31 Aspirator
16 Distilled water quality gauge electrode 32 Membrane filter

17
Description and Function of Each Part
Principle of Operation
Description of the operation mechanism of WG250/1000 by each step.
1. Drain of the boiler
Turn on the earth leakage breaker and press POWER key. And after 15 seconds passed, boiler drain
solenoid valve (10) opens for approx. 40 seconds, and cooling water solenoid valve (3) opens for approx. 30
seconds at the same time. Drain of the boiler is performed every 5 hours during distillation.
2. Boiler Water Supply and Distilling Operation
When drain of the boiler is finished, both of raw water supply solenoid valve (4) and boiler water supply
solenoid valve (17) open at the same time in order to supply water to boiler (12). When float switch 1 (8) in
float cylinder (7) detects water level, heater (13) is turned on and distillation starts. With float switch 2 (9),
water supply to the boiler is controlled by opening/closing raw water supply solenoid valve (4) and boiler
water supply solenoid valve (17).