Yamato Scientific WS220 User Manual

Water Purifier, Auto Still

Model

WS 200/220

Instruction Manual

- First Edition -

z Thank you for purchasing " Auto Still, WS

Series" of Yamato Scientific Co., Ltd.

z 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.

Yamato Scientific Co. LTD.

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.................................................7

• Main Unit.......................................................................................................................7

• Control Panel.................................................................................................................9

• Piping System View.....................................................................................................10

 Installation/Operation Method..............................................................11

• Connecting the Water Supply Hose............................................................................ 11

• Connecting the Drain Hose......................................................................................... 12

• Operation Preparation................................................................................................. 12

• Operation Method........................................................................................................12

 Handling Precautions ...........................................................................13

 Maintenance Method.............................................................................15

• Daily Inspection and Maintenance ..............................................................................15

• Washing Distiller..........................................................................................................16

• Washing Method .........................................................................................................18

• Replacement of Hose.................................................................................................. 19

• Replacement of Heater ...............................................................................................20

 Long storage and disposal...................................................................21

When not using this unit for long term / When disposing............................................21

•

 In the Event of Failure….......................................................................22

 After Service and Warranty ..................................................................23

 Specification..........................................................................................24

 Wiring Diagram......................................................................................25

 Replacement Parts Table......................................................................26

 Reference...............................................................................................27

• List of Dangerous Substances ....................................................................................27

Explanation

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.

Cautions in Using with Safety

MEANING OF ILLUSTRATED SYMBOLS

WARNING!
CAUTION!

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

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.

1

Table of Illustrated Symbols

Warning

Cautions in Using with Safety

Warning,
generally

Caution

Caution,

generally

Caution,

water only

Warning,

high voltage

Caution,

electrical shock

Caution,

deadly poison

Warning,

high temperature

Caution,

Warning,

drive train

Caution,

scald

no road heating

Warning,

explosive

Caution,

not to drench

Prohibit

Prohibit,

generally

Compulsion

Compulsion,

generally

inflammable

Compulsion,

connect to the

Prohibit,

grounding

terminal

to disassemble

Compulsion,

install on a flat

Prohibit,

surface

Prohibit,

to touch

Compulsion,

disconnect the

power plug

Compulsion,

periodical

inspection

2

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 a rc may be generated when the power switch is turned on or off,
and fire/explosion may result. (Refer to page27 “List of Dangerous Substances”.)

Always ground this unit

Always ground this unit on the power equipment side in order to avoid electrical shock due to a power
surge.

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.

Substances that can not be used

Never use explosive substances, flammable substances and substances that include explosive or
flammable ingredients in this unit. Explosion or fire may occur.

Do not disassemble or modify this unit

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

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.

3

Requirements for Installation

Before Using this unit

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 exceeds 35°C.
♦ Ambient temperature fluctuates violently.
♦ There is direct sunlight.
♦ There is excessive humidity and dust.
♦ There is a constant vibration.

• Install this unit on a stable place with the space as shown below. This unit should be installed

horizontally by using adjusters on the four corners.

More than 20cm

More than

20cm

Main Unit

Front side

More than

20cm

4

Before Using this unit

Requirements for Installation

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 page27
“List of Dangerous Substances”.)

4. Do not modify

• Modification of this unit is strictly prohibited.
This could cause a failure.

5. Installation on horizontal surface

• Set this unit to the flattest place. Not setting
this unit with its 4 legs covered with rubber
contacted to the setting place surface evenly
could cause the vibration or noise, or cause
the unexpectible trouble or malfunction.

5

Requirements for Installation

Before Using this unit

CAUTION!

6. Choose a correct power distribution board or receptacle

• Choose a correct power distribution board or receptacle that meets the unit’s rated electric
capacity.

Electric capacity: WS200: AC100 V, 15A

WS220: AC100 V, 15A

NOTE)

There could be the case that the unit does not run even after turning ON the power. Inspect
whether the voltage of the main power is lowered than the specified value, or whether other
device(s) uses the same power line of this unit. If the phenomena might be found, change the
power line of this unit to the other power line.

7. Before/after installing

• It may cause injure to a person if this unit falls down or moves by the earthquake and the
impact. etc..To prevent, take measures that the unit cannot fall down, and not install to busy
place.

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 outlet which is supplied appropriate power and voltage.

6

Main Unit

Description and Function of Each Part

WS200

Condenser

Tank

Float switch

Float tube

Water cock

Micro switch

Heater

Bimetal thermostat

Boiler

Fixed flow rate valve

Solenoid valve
Water supply port

Boiler drain cock

Production plate
(Right side of the unit)

Drain port

Power switch
(Earth leakage breaker)

Rubber leg

Rear view (common to WS200/220)

Control/Display panel

Drain hose

Power cord

7

Main Unit

WS220

Float switch

Condenser

Tank

Description and Function of Each Part

Micro switch

Bimetal thermostat

Heater

Boiler

Fixed flow rate valve

Float tube

Water cock

Rubber leg

Solenoid valve

Water supply port

Boiler drain cock

Production plate
(Right side of the unit)

Drain port

Power switch
(Earth leakage breaker)

Control/Display panel

8

Control Panel

Description and Function of Each Part

POWER

④

POWER

ALARM

③　　　　　　　　⑤

②

①

DISTIL L

FULL LEVEL

① Power switch：

② Power lamp：
③ Alarm lamp：
④ Distillation lamp：

Full tank lamp

⑤

NOTE) If the boiler water falls below the specified level, the alarm lamp remains ON until the specified level of

water is supplied in the boiler after the power switch is turned ON.
The alarm lamp goes OFF when the specified level is reached and the heater is energized (distillation
lamp ON).

Power switch shared by the earth leakage breaker. If the
lever is raised, it is ON.

POWER (green): Goes ON when the power switch is ON.

ALARM (red): Goes ON when the boiler water level falls.

DISTILL (green): Goes ON in distillation (= heater energized).

FULL LEVEL (green): Goes ON when the tank is full. Then,
the lamps ③ and ④ are OFF.

9

Piping System View

Description and Function of Each Part

WS200 ⑩

Water supply Water drain

① Water supply port ⑨ Heater
② Solenoid valve ⑩ Heater integument pipe
③ Fixed flow rate valve ⑪ Boiler
④ Micro switch (Heater control) ⑫ Condenser
⑤ Float ⑬ Float switch
⑥ Float tube ⑭ Tank
⑦ Drain port ⑮ Water cock
⑧ Manually cock ( Boiler drain)

Mechanism

1) Water Supply (cooling water, boiler water)

Raw water is controlled to a specified flow rate (about 0.8 liter/min.) by the fixed flow rate
valve, and heat-exchanged in the condenser ⑫ as the cooling water, and then supplied to the
boiler ⑪ via the float tube ⑥, thus overflowing if exceeding the specified level finally to be
drained to outside.

2) Distillation

When the boiler ⑪ reaches the specified water level, the float ⑤in the float tube ⑥ goes up,
and detects the water level, and the heater⑨is turned ON to start distillation. The water
boiled in the boiler turns to steam, cooled/condensed in the condenser ⑫, and then pooled in
the tank as distilled water.

3) Full Tank

When the tank ⑭ reaches the specified amount of water of about 20 liter, the float switch ⑬
trips, and the solenoid valve (for supplying water) ② turns OFF, preventing the water supply
to the main unit, while the heater ⑨ turns OFF to stop distillation. When any specified
amount water has been sampled from the tank, distillation will be restarted.

4) Sampling Water

The distilled water pooled in the tank ⑭ can be sampled by opening the water cock ⑮.

WS220

Sampling

10

⑤

y

Installation/Operation Method

Connecting the Water Supply Hose

Set the main unit at a level and stable place near the tap and sink.
Keep the space of about 20cm or more in the both sides, over and back of the main unit for radiation.
Take out the accessories such as the water supply hose and water drain hose from the packaging
material in the bottom.

Tap Side (See Fig. 1)

1. Slide the sleeve of the socket ③ in the
direction of arrow, and the main unit of the
connection port can be separated from the
hose. At first separate the two components.

2. Loosen the plug ② once by the ring ①.

3. Tighten uniformly the 4 fixing screws ⑤ while
pressing softly the packing ⑥ onto the tap
flat. If the tap is a chemical water tap, the

fixing screws should be adjusted and located
at the lowest depth of the tap nipple as shown
in the drawing.

4. Turn the plug ② clockwise and tighten it
firmly. Thus, the tap and the connection port
are sealed with the packing ⑥.

5. While the sleeve is being slid in the direction of
arrow, insert the socket ③ into the plug ②
firmly. If the sleeve returns when hand
comes off, the connection is accomplished.

NOTE) Ensure that the pressure of water way

remains in the range 50 - 500 Kpa including
night hours.

④ Spacer

Fixing Screw

⑥ Packing

⑦ Filter

Tap

Tap Side (Fig. 1)

① Ring

② Plug

③ Socket

Sleeve

Main Body Side (See Fig. 2)

1. Remove the rubber cap from the plug ①.

2. While the sleeve is being slid in the direction of
arrow, insert the socket ② firmly into the plug ①
in the main unit side. If the sleeve returns when
hand comes off, the connection is accomplished.
The socket has a valve in it, and such valve will not
open unless the plug is connected, thus preventing
the passage of water.

NOTE) Be sure to connect the attached hose to the tap

at a place where sink is installed (water drain).
If no water drain system is available in the tap
side, be sure to use "Water supply power unit" in
the nonstandard option for safety measure for
water leakage.

Water Supply Port
(at the bottom of main body)

① Plug

Sleeve

② Socket

Water Suppl

Hose

Main Body Side (Fig. 2)

11

Connecting the Drain Hose

1. Remove the rubber plug from the outlet of the
water drain port ②.

2. Route the water drain hose ⑤, and insert it into
the water drain port ②. Then tighten them
with the attached hose band ⑥ firmly.

3. When discharging the boiler water, the temp of
the drained water could exceed 60℃. Worker
could be burned. Do not touch such water
carelessly. Water should be drained to a place
away from the work place.

NOTE)

• The water drain hose may be routed in from the

right/left sides of the main unit. Route such
hose in from convenient side.

• Do not wind around the water drain hose, but

cut it to the required length for use. Take
delicate care to prevent it from being folded,
and be sure to place it below the water drain
port of the main unit. Any piping possibly
causing water pool in the hose or at the outlet
of the hose should be avoided, because the
resistance in discharging water increases.
Flow of water could also be reversed.

Installation/Operation Method

Tap

②

①

⑥

④

① Water supply port ② Water drain port
③ Water supply hose ④ Power cable
⑤ Water drain hose ⑥ Hose band

⑤

③

Operation Preparation

Open the front door of the main unit, and remove
the rubber rings fixing the micro-switch and the
float in the float tube (fixed to prevent the float
from coming off in transit). (Be sure to remove
this, for non-load combustion is feared.)

Float

Float Tube

Operation Method

1. Open the tap.

2. Check if the manual cock for discharging boiler water is closed.

3. Turn ON the power switch (shared by earth leakage breaker) in the front.

4. The distilled water pooled in the tank can be sampled by opening the tap.

Micro Switch

Ring Rubber

12

Handling Precautions

WARNING!

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.

Substances that cannot be used

Never use explosive substances, flammable substances and substances that include explosive
or flammable ingredients in this unit. Explosion or fire may occur. (Refer to page27 “List of
Dangerous Substances”.)

CAUTION!

Do not step on this unit

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

Do not put anything on this unit

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

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.

Clean this unit with enough

The insides of the boiler, condenser and storage tank are washed previously. However, when
using this unit for the first time or after this unit was stopped for a long time, drain about 5 liters of
water in an attempt to remove initial impurities.

Sampled amount

Amount of the distilled water sampled differs more or less according to the minor fluctuations of
heater capacity, power voltage or of raw water temp. and the boiler scale deposited on the
heater.

Pressure of water way

The pressure of water way shall always be in the range 50 - 500 Kpa (0.5 - 5kgf/cm2). If the
pressure of water way is too low, steam could gush out from the condenser due to the shortage
of cooling water.

Countermeasure for stop operation during night or long-term stop

In case of stopping operation during night or long-term, toggle the power switch to "OFF", and
also close the tap.

13

Handling Precautions

CAUTION!

Prevention of freezing

If it is necessary to use this unit at a cold place in winter, and if the pipe or the water in the boiler
could freeze, install an electric lamp (100 - 200W) in the armor of the main unit to prevent
freezing. Such lamp to prevent freezing and this unit shall always be energized by different
power sources. Such lamp must not be energized via the breaker in this unit.

Using well water

If any well water is used for the raw water, more of residues including scale are deposited in the
boiler. Therefore, clean the inside of the boiler more often than the case tap water is used.

Characteristics of distilled water

Distilled water has the following characteristics. However, it is ideal to use the demineralized
water immediately after it is distilled and sampled. If, therefore, distilled water has be en pooled
in the tank for a long time, drain such water once, and then start distillation anew. Substances
of low boiling point such as ammonia can be removed, and both electrolytic and non-electrolytic
substances can be removed averagely as well. In the manufacturing (condensation and
storage) process, however, carbon dioxide gas is absorbed from the atmosphere to produce
carbonic acid. So the electric conductivity is worse than ion exchanged water; about 2 to 3 x

-4

S/m (2 to 3μS/cm) 25℃. This is a weak acidity (PH5 to 6). To remove the dissolved

10
gases (oxygen and carbon dioxide gas) in the demineralized water, see the item "2 - Common
Items, (8) Water" in JIS K 0102 (How to Test Industrial Waste Water).

Recovery of power failure

When power is supplied after a power failure, the device automatically starts operation again with
the same state as just before the power failure. It is danger that the device starts unattached
operation after a power failure. We recommend for you to turn off the switch of this unit if a
power failure occurs during operation.

14

Maintenance Method

Daily Inspection and Maintenance

For the safety use of this unit, please perform the daily inspection and maintenance without fail.
Since this unit distills the city water directly, scale is deposited in the boiler extremely. Therefore,
maintenance and checks are mainly planned to remove such boiler scale.

Reference for maintenance

Maintenance/check items Reference for timing Remarks

Washing Distiller 3 months
Washing water supply hose

filter

Replacement of hoses 2 years

Replacement of flow washers

6 months

If the amount of cooling water
decreases and if steam comes
out from the condenser or float
tube.

Wash the distiller more often in
case the quality of raw water is
not good.

Connections shall be checked
once per month.

The flow washer (rubber) in the
fixed flow rate valve deteriorates
in about 2 years. In such a case,
ask for services.

WARNING!

• Disconnect the power cable from the power source when doing an inspection or maintenance
unless needed.

• Perform the daily inspection and maintenance after returning the temperature of this unit to the
normal one.

• Do not disassemble this unit.

CAUTION!

Main unit maintenance

• Use a well-drained soft cloth to wipe dirt on this
unit. Do not use benzene, thinner or cleanser for
wiping. Do not scrub this unit. Deformation,
deterioration or color change may result in.

Monthly maintenance

• Check the earth leakage breaker function.

1. Connect the power cord.

2. Turn the breaker on.

3. Push the red test switch by a ballpoint pen etc.

4. If there is no problem, the earth leakage breaker will be turned off.

For any questions, contact the dealer who you purchased this unit from, or the nearest sales
division in our company.

15

Maintenance Method

Washing Distiller

1. Water Drained from Boiler

Water in the boiler is condensed as the distillation continues, thus promoting the deposition of boiler
scale. To prevent this, open the front door once or twice daily (after every 5 - 8 hours of distillation),
and drain water via the boiler water drain cock in the front. After completing the drain of water, turn ON
the power switch to start supplying water. Close the cock after discharging water for 2 - 3 min. This
washes away the scale from the pipes effectively.

2. Washing Distiller

If large amount of boiler scale is deposited in the boiler or float tube, malfunction (non-load combustion)
could result. Check the unit once per month. Wash the boiler once in about 3 months. Do this more
often according to the water quality and operating hours.

Removal of Distiller

1. Turn OFF the power switch.

2. Open the front door.

3. Open the manual cock to drain the water from the boiler.

2-A) WS200 (See Fig. 5 on the next page.)

1. Raise the cover (Teflon tube) ⑧ for the heater terminal ⑫ on top of the boiler, and remove the lead
wire from the heater ④ by using Phillips screwdriver. In doing this, take care not to drop the heater
lead wire or terminal cover in the back until it is installed next.

2. Pull off the metal piece (same as ⑥ in WS220) fixing the boiler ① and condenser by loosening the
3 knurled screws (same as ⑦ in WS220).

3. Remove the silicone hoses and cap nuts from the boiler water drain port ⑨ and the boiler water
supply port ⑩. In doing this, pay attention to the dripping water.

4. When the screws fixing the boiler are removed by using Phillips screwdriver, the distiller (boiler) can
be removed.

NOTE) Packing is provided between the condenser and boiler. Store this with great care.

2-B) WS220 (See Figs. 5 on the next page and 5-1 on this page.)

The heater terminal ⑫ is connected to the
terminal block a in the upper frame. Remove the
locking screw c, terminal cover b and locking
screw d by using Phillips screwdriver, and remove
the lead wire of the heater.

Take the subsequent steps the same way as in
WS200.

NOTE)

• Packing is used in each connection. Take

care not to lose these packing when removing
components.

• Glass components and heater are easily

damaged. Handle these things with great
care. Do not try to fold or pull the heater or
lead wire more than necessary, either.

d

a Terminal Block

Terminal Cover

b
c

Locking Screw (for Locking
Terminal Cover)

Locking Screw (for Locking Lead Wire)

d

a

b

Fig. 5-1

c

16

Washing Distiller

Maintenance Method

⑫

⑦

⑨

⑪

⑩

⑥

⑧

⑤

③

②

⑫

④

①

WS200

①

Boiler

②Packing
③Boiler cover
④Heater
⑤Heater nut
⑥Setting plate
⑦Screw nut
⑧Teflon tube
⑨Boiler drain port
⑩Boiler supply port
⑪Boiler vapor port
⑫Heater terminal

WS220

①

Boiler

②Packing
③Heater integument

pipe

④Buffer
⑤Heater
⑥Fixer
⑦Screw
⑨Boiler drain port
⑩Boiler supply port
⑪Boiler vapor port
⑫Heater terminal

⑦

⑥

⑤

④

③

⑪

②

①

⑪

⑩

⑨

WS220

Fig. 5

WS200

17

Maintenance Method

Washing Method

1. Adjustment of Washing Solution

Prepare about 2 liters of hot water at 50 - 60℃ for WS200, and about 1.5 liters for WS220.
Add about 200 g (WS200) or 150 g (WS220) of the attached scale-washing agent to this hot water, and

stir thoroughly (standard: 8 - 10%).

2. Washing Method

1. Wash the boiler ① with water. Never wet the heater terminal with water.

2. Insert the attached rubber plugs (2 pcs) into the boiler water drain port
supply port

3. Put the boiler in the bucket, etc., and stand it almost vertical, and then supply the washing solution
prepared in "1. Adjustment of Washing Solution" into the boiler by way of the boiler steam port ⑪.
Most of the boiler scale will be eliminated in 4 to 5 hours. If large amount of scale is deposited, add
the washing solution newly, and repeat washing, or tray washing with brush.

4. When the washing of scale is completed, drain the solution (First, neutralize the solution with the
counteragent such as sodium hydroxide, and then drain), and remove the rubber plugs. Next, wash
this with water thoroughly until it gets neutral. In doing this, too, take care so that the heater
terminal may not get wet with water.

⑩.

⑨ and the boiler water

NOTE)

• Wash the boiler and heater as soon as possible. The more scale is deposited, the more difficult it

is to remove such scale. Amount of distilled water sampled may be reduced, or the heater may be
damaged.

• If the condenser or float tube is fouled badly, wash it similarly. As in washing the boiler, supply the

washing solution 4 to 5 hours before. Most of the scale will be eliminated.

• After completing the washing, drain the washing solution outside, and neutralize by using

counteragent. In such neutralizing operation, use pH test paper, etc. to check neutrality (main
ingredient: sulfamic acid).

• In storing this washing agent, seal the container to avoid high temp. and high humidity, and store it

at a dark place.

• When handling this washing agent, wear protective tools (gloves, mask, goggles, etc.).

• If any part of human body comes in contact with the washing agent, wash such part with clean water

thoroughly .

• Empty container must not be used to contain drinks.

• Since this causes rice plant to wither, do not flow the washing agents into the agricultural waterway

of paddy fields.

3. Installation of Distiller

Install the distiller in the reversed order of removal procedure after wiping off the water from the outside
of the boiler. Pay appropriate attention to the following points:

• If any locking screw connecting heater is loose, burning accident may result. Take appropriate care

even after connection.

• Check if the hose and packing are inserted into each joint.

• Check if the boiler water drain cock is closed.

18

⑤

r

Replacement of Hose

1. Washing Water Supply Hose Filter

1. After closing the water cock, separate the
connection port from the hose side by
one-touch joint.

2. Remove the plug
wash the filter ⑦ inserted in the plug with
city water.

3. If clogged badly, remove the filter by using
the flat side of pencil, and wash it by using
brush, etc.

② from t he ring ①, and

④ Spacer

Mounting

Screw

⑥ Packing

Maintenance Method

Tap

① Ring

② Plug

⑦ Filter

③ Socket

Sleeve

Fig. 6

2. Replacement of Hose

Be sure to use the replacement hoses specified by Yamato Scientific.
Replace the pressure-resistant hoses (black and milky white hoses) used in the unit in the following

procedure:

1. Remove the cap nut, and pull off the
hose from the connector.

2. Replace the cap nut and sleeve to the
new hose. Cut the top of the hose as
perpendicularly as possible.

3. Insert the hose to the depth of the
connector, and tighten the cap nut firmly
by way of the sleeve.

Connector

Sleeve

Milky White Hose

Cap Nut

Cap Nut

Sleeve

Back Hose

Connecto

19

g

Maintenance Method

Replacement of Heater

1. WS200 (See Fig. 5 in Page 17)

1. Turn OFF the power switch.

2. Open the front door.

3. Open the manual cock, and drain water from the boiler.

According to Page 16 "Washing Distiller" remove the heater of WS200 alon

①), and remove the mounting plate ⑥, butterfly nut ⑦ and boiler cover ③ sequentially, and then

remove the heater.

2. WS220 (See Fig. 5 in Page 17 and Fig. 5-1 in Page 16)

1. Turn OFF the power switch.

2. Open the front door.

3. Open the manual cock, and drain water from the boiler.

4. Remove the locking screws (2 pcs) from the terminal block a fixed in the upper frame of the main
unit, and remove the terminal block cover b. Remove the screw d fixing the lead wire of the heater
by using Phillips screwdriver, and then remove the lead wire.

5. Pull off the metal press
loosening the knurled screws (3 pcs) ⑦.

6. Remove the cover fixed on the frame ceiling by removing the locking screws (2 pcs).

7. Heater can be unloaded by itself, not with distiller, from the hole on top of the frame.

⑥ fixing the distiller (boiler ①), outer tube of heater ③ and heater ⑤ by

with the distiller (boiler

20

Long storage and disposal

When not using this unit for long term / When disposing

CAUTION!

When not using this unit for long term…

• Turn off the power and disconnect the power cord.

WARNING!

When disposing…

• Keep out of reach of children.

• Remove the driving parts.

• Treat as large trash.

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
Door Made of iron, bonded steel plate, melamine resin baking finish
Leg Made of iron, bonded steel plate, melamine resin baking finish
Main Components of Distill/Condense System
Boiler (WS200) Stainless steel plate SUS 304
Boiler cover (WS200) Stainless steel plate SUS 304
Heater (WS200) Copper pipe, Iron-chrome wire, and others
Boiler packing Silicon rubber
Boiler (WS220) Hard glass
Heater integument pipe (WS220) Quartz glass
Bobbin heater (WS220) Porcelain, Iron-chrome wire
Condenser Hard glass
Float tube Hard glass
Float tube cover PVC
Float P.P
Float shaft Stainless steel SUS 304
Condenser Brass
Main Components of Tank Section
Distilled water tank Polyethylene
Water cock Polyacetal

Main Components of Piping System

Water supply port, Drain port Brass Pipe joint (resin) P.P
Fixed flow rate valve Brass, and others Hose (black/thin) Nylon
Drain cock Brass, and others Hose (black/thick) Ethylene propylene
Pipe joint (metal) Brass Hose (transparent) Silicon rubber

21

Trouble Shooting

Condition Possible Causes

In the Event of Failure…

Power lamp on the control panel does
not light on when turning on the power
switch.

No water is supplied.

Water supply is not stopped.

No water is supplied to boiler.

Heater does not turn on.

Distillation does not stop.

• Power plug is not connected to the receptacle correctly.

• Power failure.

• Defects in the raw water supply solenoid valve.

• Insufficient pressure of water way or cut-off of water.

• Defects in the float switch.

• Defects in the raw water supply solenoid valve.

• Defect of float switch.

• Defect of boiler water supply solenoid valve.

• Defect of float switch.

• Heater disconnection.

• Defect of float switch.

When power failure occurs…

• When power is supplied after a power failure, the device automatically starts operation again with

the same state as just before the power failure. It is danger that the device starts unattached
operation after a power failure.

• We recommend for you to turn off the switch of device if a power failure occurs during operation.

In the case if the error other than listed above occurred, turn off the power switch and primary
power source immediately. Contact the shop of your purchase or nearest Yamato Scientific
Service Office.

22

After Service and Warranty

In Case of Request for Repair

If the failure occurs, stop the operation, turn OFF the power switch, and unplug the power plug.
Please contact the sales agency that this unit was purchased, or the Yamato Scientific's sales
office.

< Check following items before contact >

Model Name of Product

◆

◆ Production Number

◆ Purchase Date

◆ About Trouble (in detail as possible)

Minimum Retention Period of Performance Parts for Repair

The minimum retention period of performance parts for repair of this unit is 7 years after
discontinuance of this unit.
The "performance part for repair" is the part that is required to maintain this unit.

See the production plate attached to this unit.

23

Performance

Specification

Model WS200 WS220

Collecting method Distillation

Sampled pure water Distilled water

Quantity of distilled water Approx. 1.8L/h

Boiler Stainless steel (SUS 304) Super hard glass

Condenser Super hard glass

Heater Pipe heater

Power supply 100V AC single phase 50/60Hz 15A

(W×D×H)

Weight Approx. 30kg

Configuration

Standard

Attached accessories

Expendables

Attached mechanism

Distiller

Distilled water storage tank Made of polyethylene, 20L

External dimensions

Water supply hose (Connect unit is attached) : 2m, Water drain hose (Hose band is
attached) : 2m, Scale washing agent : 1kg, Rubber stopcock (for washing distiller) :
2pcs, Instruction manual

Scale washing agent, Heater
Auto adjustment of cooling water volume, Prevention of baking heater with no load,

Earth leakage breaker

Optional accessories

Product Code Name/Specification

253686 Water supply port unit
253176

Frame (AS22) / External dimensions (set with WS200/220) : W576×D416×H1835 mm

Set in quartz glass

integument pipe

500×400×975 mm

24

Wiring Diagram

Symbol Part name Symbol Part name

ELB Earth leakage breaker X1 Relay (for heater)

LN1 Power lamp X2 Relay (for water level of tank)
LN2 Distill lamp MS Micro switch (for water level of boiler)
LN3 Alarm lamp FS Float switch
LN4 Full level lamp MV Water supply solenoid valve

BS Bimetal thermostat H Heater

25

Replacement Parts Table

Common Use Parts

Part Name Code No. Specification Manufacturer

Solenoid valve 3020076019 AB21022A AC100V CKD
Fixed flow rate valve 3220016004 RSP-10-8-0.8L Keihin
Flow washer for

fixed flow rate valve (*)
Ball valve 3150030001 BSN-00-08 PT1/4
Micro switch 253044-176 VX-53-1A3 secondary processing
Condenser 253003-215 Super hard glass
Packing (for condenser) 7120016050
Distilled water tank 253045-162 Hard polyethylene
Float switch 20400300003 FR-1-100 Tokyo Seigyo
Earth leakage breaker 2060050002 BJS203 Matsushita
Terminal block 2070066001 FD-06-N30-4P 250 tab ABC Kohwa
Lamp 2090066012 BN-9E-W/R AC100V (g reen) Satoh Parts
Lamp 2090066018 BN-9E-W/R AC100V (red) Satoh Parts
Relay 2050000019 AHE-1254 Matsushita
Relay LT00029307 AP5514F Matsushita
Water cock 3270016001 Polyacetal Opera
Scale washing agent (*) 8190010001 Orgazol 10 Organo
Bimetal thermostat WA33000110

322001600A 0.8L Keihin

alve
alve
alve
alve
alve

Silicon φ60×φ44×ｔ2

TH-53F580FS 110℃

Miyairi V
Miyairi V
Miyairi V
Miyairi V
Miyairi V

Fuji Controls

Relay 2050080002 AP3124K Matsushita

WS200

Float tube WS200-30130 Super hard glass Yamato Scientific
Boiler 253045-146 SUS304 Yamato Scientific
Heater 253045-149 1.5KW AC100V Yamato Scientific
Packing (for boiler) 253045-150 Silicon Yamato Scientific

WS220

Nut (for boiler) 253044-153 Teflon Yamato Scientific
Boiler 253046-146 Super hard glass Yamato Scientific
Heater integument pipe 253044-151 Quartz glass Yamato Scientific
Heater (*) 253046-149 Bobbin type 1.5KW AC100V Yamato Scientific
Packing (for heater) 7120016073 Teflon Yamato Scientific
Kao-wool 6030036001
L-pipe 253046-155 Super hard glass Yamato Scientific
Heater terminal block 2070146001 ML-17652P (with double screw cover) Satoh Parts
Float tube WS220-30080 Super hard glass Yamato Scientific

20×25×t30

Yamato Scientific

*:Expendables

26

List of Dangerous Substances

Never use explosive substances, flammable substances and substances that include explosive
or flammable ingredients in this unit.

EXPLOSIVE

Ethylene glycol dinitrate (nitro glycol), Glycerin trinitrate (nitroglycerine), Cellulose
nitrate (nitrocellulose), and other explosive nitrate esters

Reference

EXPLOSIVE:

FLAMMABLE

IGNITING:

OXIDIZING:

Trinitrobenzene, Trinitrotoluene, Trinitrophenol (picric acid), and other expl osive
nitro compounds

Acetyl hidroperoxide (peracetic acid), Methyl ethyl ketone peroxide, Benzyl
peroxide, and other organic peroxides

Lithium (metal), Potassium (metal), Sodium (metal), Yellow phosphorus,
Phosphorus sulfide, Red phosphorus, Celluloid compounds, Calcium carbide,
Lime phosphate, Magnesium (powder), Aluminum (powder), Powder of metals
other than magnesium and aluminum, Sodium hydrosulfite

Potassium chlorate, Sodium chlorate, Ammonium chlorate, and other chlorate
Potassium perchlorate, Sodium perchlorate, Ammonium perchlorate, and other

perchlorate
Potassium peroxide, Sodium peroxide, Barium peroxide, and other inorganic

peroxide
Potassium nitrate, Sodium nitrate, Ammonium nitrate, and other nitrate
Sodium chlorite and other chlorites
Calcium hypochlorite and other hypochlorites
Ethyl ether, Gasoline, Acetaldehyde, Propylene chloride, Carbon disulfide, and

other flammable substances having a flash point of lower than -30

℃

INFLAMMABLE

LIQUID:

FLAMMABLE

GAS:

Normal hexane, ethylene oxide, acetone, benzene, methyl ethyl ketone, and
other flammable substances having a flash point of -30

℃

than 0
Methanol, Ethanol, Xylene, Pentyl acetate (amyl acetate), and other flammable

substances having a flash point of 0
Kerosene, Light oil (gas oil), Oil of turpentine, Isopentyl alcohol (isoamyl alcohol),

Acetic acid, and other flammable substances having a flash point of 30
higher but lower than 65

Hydrogen, Acetylene, Ethylene, Methane, Propane, Butane, and other flammable
substances which assume a gaseous state at 15

℃

℃ or higher but lower than 30℃

℃ and 1 atm

℃ or higher but lower

℃ or

(Source: Appendix Table 1 of Article 6 of the Industrial Safety and Health Order in Japan)

27

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, Auto Still
Model WS200/220

First Edition Feb. 27, 2001
Revision

Oct. 20, 2008

Yamato Scientific Co., Ltd.

2-1-6 Nihonnbashi Honcho, Chuo-ku,

Tokyo, 103-8432, Japan

http://www.yamato-net.co.jp

28