● Thank you very much for purchasing this Yamato
Pure LineⓇ WL220T.
● Please read the “Operating Instructions” and
“Warranty” before operating this unit to assure proper
operation. After reading these documents, be sure to
store them securely together with the “Warranty” at a
handy place for future reference.
Warning:
Before operating the unit, be sure to read
carefully and fully understand important
warnings in the operating instructions.
Water Purifier
R
Pure Line
○
WL220T
Instruction Manual
Second edition
Yamato Scientific America Inc．
Santa Clara，CA
The documents are printed on recycled paper.
Contents
1. Safety precautions ............................................................................................................................. 1
Explanation of pictograms ................................................................................................................. 1
List of symbols ................................................................................................................................... 2
Warning・Caution .............................................................................................................................. 3
2. Before operating the unit ................................................................................................................... 5
Installing procedures and preparation before operation ................................................................... 5
Precautions for installation ................................................................................................................ 6
Installation procedures ....................................................................................................................... 8
3. Names and Functions of Parts ........................................................................................................ 13
Main unit .......................................................................................................................................... 13
Piping diagram ................................................................................................................................. 14
Operation panel ............................................................................................................................... 16
4.Operation Method ............................................................................................................................. 17
Pre-start preparation and checks .................................................................................................... 17
Operation method ............................................................................................................................ 17
Water supply to the tank .................................................................................................................. 18
Water supply to the constant temperature and humidity chamber .................................................. 18
Selecting the water quality unit ........................................................................................................ 19
Water quality and water quality display ........................................................................................... 20
Water quality characteristics data (reference) ................................................................................. 21
Data of deterioration of tank water quality (reference) .................................................................... 22
5. Useful Functions .............................................................................................................................. 23
List of optional parts ......................................................................................................................... 23
Setting of the input terminal for remote water supply (optional)...................................................... 24
Setting of the external alarm output (optional) ................................................................................ 24
6. Maintenance procedures ................................................................................................................. 25
Maintenance and inspection ............................................................................................................ 25
Replacing the ion exchange resin cartridges .................................................................................. 25
Resetting after replacement of consumable parts (when an alarm is triggered） .......................... 26
Washing the supply hose strainer ................................................................................................... 27
Replace the piping hose. ................................................................................................................. 27
7. When the unit is not to be used for a long time or when disposing ................................................ 28
Requests in case of disposal ........................................................................................................... 28
8.Troubleshooting Guide ..................................................................................................................... 30
Display and contents ....................................................................................................................... 30
If a malfunction is suspected ........................................................................................................... 31
Troubleshooting ............................................................................................................................... 32
9. After sales service and warranty ..................................................................................................... 33
When requesting a repair ................................................................................................................ 33
10.Specifications ................................................................................................................................. 34
11.Electric diagram .............................................................................................................................. 35
Wiring diagram ................................................................................................................................. 35
Part symbols of wiring diagram ....................................................................................................... 36
12.Replacement part table .................................................................................................................. 37
13. List of dangerous materials ........................................................................................................... 38
14. Standard installation manual ......................................................................................................... 39
1. Safety precautions
About pictograms
A variety of pictograms are indicated in this operating instruction and on
products for safe operation. Possible results from improper operation
ignoring them are as follows.
Be sure to fully understand the descriptions below before proceeding to the
text.
Warning
Caution
Indicates a situation which may result in minor injury (Note 2) and
property damages (Note 3.)
（Note 1）Serious injury means a wound, an electrical shock, a bone fracture or intoxication that may
leave after effects or require hospitalization or outpatient visits for a long time.
（Note 2）Minor injury means a wound or an electrical shock that does not require hospitalization or
outpatient visits for a long time.
（Note 3）Property damage means damage to facilities, devices and buildings or other properties.
Meanings of pictograms
This pictogram indicates a matter that encourages the user to adhere to warning
(“caution” included).
Specific description of warning is indicated near this pictogram.
This pictogram indicates prohibitions
Specific prohibition is indicated near this pictogram.
This pictogram indicates matters that the user must perform
Specific instruction is indicated near this pictogram.
Indicates a situation which may result in death or serious injury (Note 1.)
Explanation of pictograms
1
General warnings
Danger!: High
voltage
Danger!: High
temperature
Danger!: Moving
part
Danger!: Hazard
of explosion
General cautions
Electrical shock!
Burning!
Caution for no
liquid heating!
Caution for water
leak!
For water only
Poisonous
material
General bans
Fire ban
Do not
disassemble
Do not touch
General
compulsions
Connect ground
wire
Install levelly
Pull out the power
plug
Regular
inspection
Warning
Caution
1. Safety precautions
List of symbols
Prohibitions
Compulsions
2
1. Safety precaution
Warning
Never operate the unit in an atmosphere containing flammable or explosive gas
Never operate the unit in an atmosphere containing flammable or explosive gas.
Otherwise, an explosion or a fire may result since the unit is not explosion-proof.
See section “13. List of dangerous materials” on page38.
Be sure to connect the earth wire.
Connect the earth wire to the earth socket outlet. If the earth socket outlet is not available, use the
grounding adaptor to connect the earth lead to the ground. Otherwise, electric leakage occurs,
causing electric shock or fire.
Be sure to insert the power cord plug firmly.
Insert firmly the power cord to the extreme depth of the main body power socket. If not inserted
firmly, overheat or fire may occur.
Stop using in case of abnormality
Should any fuming or questionable odor be detected, turn OFF the power switch on the righthand side of main body immediately, and disconnect the power plug from the master power
supply. Then request inspection to the shop from which you have purchased the product, our
sales office or our customer service center.
If left unattended, such abnormality may cause fire or electric shock.
Never use electrical power cords bundled.
When these are used bundled, they might overheat causing a fire.
Take care not to damage electrical power cords.
Avoid tightly bend, pull with a strong force or twist to prevent electrical power cords from damaging.
A fire or an electrical shock may result.
Never try to disassemble or alter the unit.
Never try to disassemble or alter the unit. A malfunction, a fire or an electrical shock may result.
Always keep the tap closed when the product is not operated.
Always keep the tap closed when the product is not to be operated (during nighttime or holidays).
Otherwise, water leakage may occur.
Do not place an object on this product.
Any object, if placed on the system, may drop. Placement of the solvent may also cause trouble.
Do not ride on this product.
The person riding on the product may overturn or the system may be damaged, resulting in injury
or trouble.
Warning・Caution
3
1. Safety precautions
Warning
Install the unit at a place higher than the connecting port on the constant
temperature and humidity chamber.
This unit is dedicated for the constant temperature and humidity chamber and supplies water to
it by gravity. Installing the unit at a place lower than the connecting port of the constant
temperature and humidity chamber may cause insufficient supply of water to the chamber or a
malfunction.
When installing the unit on the constant temperature and humidity chamber, be
sure to use the optional “Installation tray”(See “5. Useful Functions” on P. 23).
Do not adjust the reducing valve.
The reducing valve has been set to the water supply rate of about 1.0L/min(raw water pressure：
3×100kPa, reducing valve pressure：0.4×100kPa) at the factory. Never attempt to readjust the
reducing valve.
If the factory setting of the valve is lost, water leak or reduction in flow may result.
Cut the connecting hose of the constant temperature and humidity chamber to a
necessary length before use.
Run the connecting hose for the constant temperature and humidity chamber without a kink or
twisting so that any trap (water pool) will not occur at any point along the hose.
Be sure to install the unit level.
The unit is equipped with a leak detecting sensor in case of a leak accident. Be sure to install the
unit level since the sensor may not operate properly if the unit is installed inclined by three degree
or more in back and forth or left or right direction.
Caution
In case of thundering
When thundering begins, turn OFF the power switch on the right-hand side of main body
immediately and pull out the power cord.
Otherwise, lightening may cause failure of the control circuit of the system or may cause fire
and electric shock.
In case of power failure
Although the unit will stop when a power outage occurs, the unit will not supply water to the tank
if water is left in the tank at the recovery from the power outage while the power switch is ON. In
contrast, it will start supplying water to the tank to the highest level if it is empty at the time of
recovery.
Turn the power switch on the right side of the unit to OFF for safety when a power outage occurs.
To resume operation, follow the steps in “Turning power on” in the ”4.Operation Method” on P.17
Warning・Cautions
4
Installing procedures and preparation before operation
Warning
・ Be sure to connect the earth wire (green wire of the power cord) to the earth wire or to
the earth terminal.
・ Never connect the earth wire to the gas pipe or water pipe, in order to prevent fire.
・ The earth wire must never be used for grounding of the telephone line and lightning
arrestor. This is to prevent fire and electric shock.
・ Never use the branch socket outlet because it causes hazardous heat generation.
Used of ground socket outlet recommended
When using a diode socket outlet
When there is no ground terminal.
●In this case, class D grounding work is
necessary and please consult your dealer or
our customer service center.
Ground adaptor
●Insert the ground adaptor into a power plug
confirming the polarity of the outlet. Connect
the grounding wire (green) of the ground
adaptor to the ground terminal on the power
supply equipment。
Take special care not to install the
unit at a place described below:
・ Uneven surfaces or dirty surfaces
・ Where flammable gas or corrosive
gas exists
・ Where the ambient temperature is
5℃ or less
・ Where the ambient temperature is
35℃ or more
・ Where temperature changes
severely
・ Where dusty and humidity is high
・ Where subject to direct sunlight
・ Where vibration is severe
・ Where unstable power supply
・ Where uneven floor（within
reference±3 degree）
・ Where raw water pressure is high
・Where with raw water pressure is
low
・ Outdoors
・At a place lower than the suction
port of the constant temperature
and humidity chamber
・On a device or a laboratory table
(with locked adjusters, etc.)
It is recommended to secure the space of the range wider than the one shown above around
the product.
Toward front
by 30cm or more
10cm or more
3-pole power plug with an
earth terminal
Earth wire
3-pole power plug with an
earth terminal
ｗ
G
W
Earth pole
10cm or more
10cm or more
1. Be sure to connect the earth wire.
2. Before operating the unit
2. Carefully select an installation site.
5
2. Before operating the unit
● Never operate the unit in an atmosphere containing flammable or explosive gas. Since
This product is not of an explosion-proof structure. Accordingly, when the power switch
on the right side of the unit is turned ON/OFF and in the course of operation, arc may
occur, possibly causing fire and explosion.
● See the section “13. List of dangerous materials” on page 38 for flammable and explosive
gases.
● If it is not installed level, the leak detection function may not operate properly when
water should leak at the pipes in the unit. The permissible error in the levelness
shall be ±3 degree and properly set the adjusters of the constant temperature and
humidity chamber or of the laboratory table to make it level.
● The unit weight is about 17kg. Handle with care during transportation and installation.
● Use the socket outlet appropriate to the power capacity (1A or larger capacity).
● The deficient power capacity causes not only decrease in the water supplying rate, but
makes correct control impossible due to drop of the supply voltage. Always connect the
product to the power supply system with sufficient allowance in the supply voltage.
Power capacity ： WL220T Single phase AC100～240V 0.5A or less
● Note that the use of extension with a cord reel may cause drop of the voltage. Avoid
starburst connection with branch socket outlet so as to prevent fire and electric shock.
爆発性ガス
可燃性ガス
WL220T
W
L
2
2
0
T
Flammable gas
Explosive gas
Precautions for installation
3. Never operate the unit in an atmosphere containing flammable or explosive gas.
4. Install on a level surface.
5. Take the power supply from the dedicated socket outlet.
6
● Connect the attached power cord to the power socket. Confirm that the power switch on the right
side of the main body is OFF, and connect the power cord plug to the socket outlet. The power cord
plug attached to this product is the three-wire cord including the earth wire, and the plug is also of
a ground plug. If the socket outlet to be used does not match the plug (that is, the 2P outlet), use
the ground adapter. When using this adapter, be sure to connect the earth lead wire to the ground.
●Never use electrical power cords bundled. When these are used bundled, they might overheat
causing a fire.
●Do not convert, forcibly bend, twist or pull the power cord. Otherwise, a fire or an electrical shock
may result.
●Do not place the power cord under a desk or a chair, or sand between objects to avoid it from being
damaged. Otherwise, a fire or an electrical shock may result.
●Do not place the power cord close to a stove or other heat generating device. Sheath of the cord
may burn and result in a fire or an electrical shock.
●If the power cord should be damaged (exposure of core wire or disconnection), immediately turn
the power supply in the right side of the main body off, disconnect the power plug and ask your
dealer to replace the cord. If the unit is operated with a damaged power cord, a fire or an electrical
shock may result.
●Connect the power cord to an appropriate wall outlet or distribution board.
● Use the supply water pressure within a range of 0.5～5×100kPa（0.5～5kgf/cm2） 24 hours a
day.
Note that the water feeding range to the tank becomes 1.0 L/min or less at the raw water pressure
of 1.0×100kPa （1kgf/cm2） or less.
● The raw water pressure range is the same even when the optional water inlet unit (see Page 23)
is used.
● When installing the unit at a higher place such as on the constant temperature and humidity bath,
the product may fall off during an earthquake and cause a dangerous situation. We strongly
recommend using the optional installation tray to stably secure the unit. The installation tray can
accept leak water and discharge using the drain hose when a water leak accident should occur.
Power outlet
Power cord
6. Connecting the power cord
2. Before operating the unit
Precautions when installing the unit
7. Handling of a power cord
8. Be sure to keep the raw water pressure from water supply within the specified range.
9. Use the installation tray (optional).
7
2. Before operating the unit
●Take out the water supply hose included in the accessories of the main unit.
●Failure to securely connect it may cause water to gush out and to result in a leak.
●First tighten the main valve before connecting the water supply hose to the water pipe side.
（1）Wrap included seal tape around
the nipple ① of the water supply
hose. Wrap the seal tape
clockwise looked from you two to
three rounds while lightly pulling it
and cut off excess portion.
（2）Connect the water pipe side screw
and the nipple ① using a wrench.
Take care so that the cap part of
the Y-strainer ② will be the under
side.
※The size of the water supply hose screw is 1/2 male. When the size of the water pipe
side screw is other than 1/2 female, prepare a nipple of a different diameter.
※Use tap water as raw water.
①Nipple
Screw dia.1/2
②Y-strainer
Cap part
Seal tape
①Nipple
Screw dia.1/2
Water pipe
side screw
1. Always connect the feed water hose firmly.
2. Make connections on the water faucet side.
Installation procedures
8
2. Before operating the unit
(1) Remove rubber cap from the water
inlet plug ⑧.
(2) With the sleeve slid in the direction
indicated with arrow, and insert the
main body water inlet plug ⑧ to
the socket ⑨ . Connection is
completed when the sleeve returns
to the original position when
released. The socket has a built-in
valve. This valve does not open
and allow water to flow unless
connected with the inlet valve⑧.
Main body side
The “water inlet plug unit” has its own valve and enables you to remove the water supply hose
without tightening the main plug of the water pipe. It also has a structure that prevents the
connection to the water plug from loosening even when tap water pressure fluctuates.
Take out the hook included in the
accessories of the main unit.
(1) Attach the hook on the back of this
product. The hook has a magnet
and can be placed at any place you
want.
(2) Put the tank drain hose on the
hook.
※ Although the tank drain hose is
plugged, if it is laid on the floor and
the plug comes off, water in the tank
will be drained. Be sure to put the
tank drain hose on the hook. If you
use the optional “installation tray”
(See “5 Useful function”. on P-23), it
will not cause any problem if you do
not use the hook and connect the
tank drain hose directly to the
installation tray.
Sleeve
Hook
Tank drain hose
⑨ Socket
⑧ Inlet valve
Valve
Installation procedures
3. Carry out connection on the main body side.
4. If you want a part with a valve, use the optional “water inlet plug unit” (see P.29).
5. Put the tank drain hose on the hook.
9
2.Before operating the unit
Take out the connecting hose of the constant temperature and humidity chamber(φ9mm×
φ13mm 3m) included in the accessories of the main unit.
（1）Remove the screws on that hold the left side cover to the main unit.
（2）Remove the screws that hold the cock installing plate.
（3）Connect the connecting hose of the constant temperature and humidity chamber（I.D.:
φ9mm）to the cock. After connecting the hose, secure it with attached hose clamp.
（4） Run the connected hose through the hole on the back plate and connect to the
connecting port on the constant temperature and humidity chamber.
※ Cock has been shipped in the closed status. After connecting the hose, turn the cock by
90° anticlockwise to open it.
※ Cut the connecting hose of the constant temperature and humidity chamber into an
appropriate length to prevent it from kinking or twisting.
When the optional “remote water supply input terminal” is used
（1）Install the connecting hose of the constant temperature and humidity chamber to the
solenoid valve nipple on the back side.
Cock securing
plate
Left side cover
Cock (open state)
Constant temperature
and humidity chamber
connecting hose
Constant temperature
and humidity chamber
connecting hose
Hose clamp
Installation procedures
6. Install the connecting hose of the constant temperature and humidity chamber to
the cock on the left side of the main unit.
10
2. Before operating the unit
● Install the ion exchange resin cartridge (CPC-P, CPC-E) as follows:
(1) Confirm that the power switch on the right side of main body is OFF and that the faucet is
closed.
(2) Install the selected ion exchange resin cartridge firmly to the resin installation plate inside
the system. For installation of the ion exchange resin cartridge of WL220, provide CPCP in the front and CPC-E in the rear.(See Figs. 01)
(3) Secure the ion exchange resin cartridge with a band to the resin installation plate.
(See Figs. 02)
CPC-E
樹脂(後)
CPC-P
樹脂（前）
バンド
Band
CPC-E resin
(rear)
CPC-P resin
(front)
Fig. 01
Fig. 02
Installation procedures
7. Connect the ion exchange resin cartridge（CPC-P, CPC-E） firmly.
11
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