WATER ELECTROLYZER

ROX-20TB2-EW

INSTRUCTION MANUALFOR END USER

3-16 Minamiyakata, Sakae, Toyoake, Aichi 470-1194 Japan

L1X002114 (032017)

In the context of this manual, the term "sanitizing water" refers toacidic water and "cleaning water" refers to alkaline water.

[1] Salt water tank
Stores salt water (5 liters).

IMPORTANT
1. This booklet is an integral and essential part of the productand should be kept and preserved by the user. Please read
carefully the guidelines and warnings contained hereinas they are intended to provide the user with essential
information for the continued safe use and maintenanceof the product. In addition, it provides GUIDANCE ONLY
to the user on the correct services and site location of theelectrolyzer. Please preserve this booklet for any further
consultation that may be necessary.

[2] Water level sensor
Senses the water level in the salt water tank. Do not curve or bend it
by force.
[3] Salt water filter
Removes foreign substances in salt water.
[4] Door[5] Operation panel
See “[c] OPERATION PANEL“.

2. This is a water electrolyzer, and should be destined only
to be used for the purpose for which it has been expressly
designed. Any other use should be considered improper andtherefore dangerous. The manufacturer will not be held liable
or responsible for any damage caused by improper, incorrect
and unreasonable use.

[6] Power supply cord
Flexible cord with an earthing conductor and earthing type attachment
plug.
[7] Sanitizing water outlet
Dispenses sanitizing water during the normal operation and cleaningwater during the flushing process.

WARNING
1. The installation must be carried out by qualified personnel,
in accordance with current regulations, according to the
manufacturer’s instructions.

[8] Water supply inlet
Inlet for potable water supplied to the unit.

2. This electrolyzer is not intended for outdoor use (including
under canopy). Exposure to rain may cause electric leak orshock. Direct sunlight can damage the plastic tank exterior,
resulting in cracks and water leaks.

[9] Cleaning water outlet
Dispenses cleaning water during the normal operation and sanitizing
water during the flushing process.
[10] Salt water hose
Made of PVC.

3. Ensure adequate ventilation. Hydrogen gas or chlorine gas
may cause health problems.

[11] Control panel
See “[b] CONTROL PANEL”.

4. Do not mix electrolyzed water with other chemicals. Mixture
with acidic or chlorine-based chemicals can cause chlorine
gas, resulting in health problems.

[b] CONTROL PANEL

5. Do not use a large volume of sanitizing water only.
Generation of a large amount of chlorine gas may cause
health problems or corrosion of surrounding equipment.
CAUTION
Do not use a flame near a container or tank holding electrolyzed
water. Hydrogen gas from cleaning water may cause ignition.

[10]

[1]

1. CONSTRUCTION[a] EXTERIOR
[10]

[2]

[8]
[7]

[9]

[3]
[4]

[1]

[5]

[9]

[6]

[2]

[7]

[3]

[6]

[5]

[8]

[1] Display
Indicates the operation time, amperage or voltage during the normal
operation and error codes in case of trouble.

[4][2] Cell operation time lamp
Display indicates cell operation time (h) when this lamp is on.

[11][3] Current lamp
Display indicates current (A) when this lamp is on.
[4] Voltage lamp
Display indicates voltage (V) when this lamp is on.
[5] Display select button
Changes the indication in the display. Also functions as up button toincrease the set values.

1[6] Flush button
Functions as a switch to flush the pipes beyond the sanitizing andcleaning water outlets. Also functions as down button to decrease theset values.

[1] Continuous dispense lamp (green)
Lights in the continuous dispensing mode which is activated or
disactivated by pressing the dispense button or putting a hand or
object in front of the dispensing sensor on the left.

[7] Flow rate lamp
Indicates the currently selected flow rate.

[2] Dispense button
Starts and stops dispensing electrolyzed water in the continuous or
portion control dispensing mode.

[8] Flow rate select button
Adjusts the flow rate.

[3] Electrolyzed water lamp (green, orange)
Indicates the cleaning water and sanitizing water outlets.

[9] Set/reset button
Only qualified service personnel or installer may press this button toadjust various set values.

[4] Dispensing sensor
Senses a hand or object to start and stop dispensing electrolyzed
water without using the dispense button.

[10] Power switch
Turns the unit on and off.

[5] Electrolyzed water outlet
Discharges electrolyzed water.

Note: When the low flow rate is selected, sanitizing water may havean excessive available chlorine concentration. Select this flowrate only when the electrolyzed water property is inadequate.

[6] Add salt water lamp (red)Indicates that the salt water tank level is too low. Flashes when theerror lamp on the operation panel lights up.

[c] OPERATION PANEL
[1]

[2]

[3]

[4]

[5]

[6]

[7] Ready lamp (green)Flashes until the desired settings are achieved and stays on when theunit is dispensing electrolyzed water.

[7][8] Handwash button
Starts and stops dispensing electrolyzed water in the handwashmode.
[9] Handwash lamp (green)
Lights in the handwash mode which is activated or disactivated bypressing the handwash button or putting a hand or object in front of
the dispensing sensor on the right. The electrolyzed water lamps lightup in turn to indicate the proper handwashing steps - first cleaning,then sanitizing (adjustable from 15 to 120 seconds each).

[1] Error lamp (red)Indicates that there is trouble detected.
[2] Replace cell lamp (red)Indicates that the cell life is near completion. Flashes continuously
from 2900 hours to 3000 hours and stays on after 3000 hours.

[10] Portion control lamp (green)
Lights in the portion control dispensing mode which is activated bypressing the dispense button for 3 seconds or putting a hand or object
in front of the dispensing sensor on the left for 3 seconds. Water
automatically stops after the set dispense time indicated in the display
on the control panel (adjustable from 1 to 60 minutes).

[3] Flush lamp (red)Stays on during the flush operation. Indicates that the unit is in flush
cycle.
[4] Add salt water lamp (red)Indicates that the salt water tank level is too low.
[5] Ready lamp (green)Flashes until the desired settings are achieved and stays on when theunit is dispensing electrolyzed water.

Note: To avoid unbalancing the water properties or causing waterleaks, do not block the water outlets.
The dispensing sensor may react with reflective materials suchas glass and metal, even outside the normal detection range.

[6] Operation lamp (green)
Indicates that the unit is running.

[e] ACCESSORIES[7] Dispense button
Starts and stops dispensing electrolyzed water.

Connector
Instruction manual
Cap
Water supply hose
Salt water tank
XM Connector (5P)*[d] REMOTE CONTROLLER
[1]

[2]

[10]

[9]

pH test paper UNIV
Installation manual
GasketBraided hose
Clamp
Dual check valve

Chlorine test paper
Operation sheet
Pressure reducing valve
Measuring cup
Rubber dropper
Nipple* To operate the unit in the pool mode, replace the XM
connector (5P) [red] on the rear of the control box
with the accessory XM connector (5P) [blue]. See “II. 9.
[a] OPERATION MODE” in the installation manual.

[8]

[7]
[3]

2. CHECKS BEFORE OPERATION[a] CHECKING AMOUNT OF REMAINING SALT WATER

[6]
[4]

1) Check that there is enough salt water in the salt water tank.
2) Add salt water according to “[b] SUPPLYING SALT WATER” if there
is not enough or no salt water in the tank.

[5]2

4. START UP[b] SUPPLYING SALT WATERCAUTIONUse sodium chloride (NaCl) or potassium chloride (KCl) of notless than 99% of purity. Use of any other salt may cause failure,
clogged pipes or health problems.

1) Plug in the unit.
2) Open the water supply line shut-off valve.
3) Check for proper operation of the water softener. Refer to the
instruction manual provided for operating instructions. See “8.
[f] WATER HARDNESS (WEEKLY)” for how to check for watersoftening.

1) Prepare a plastic bucket. Pull out
the cap, salt water hose and filter
from the salt water tank, and put
them into the bucket.

4) Check that the salt water tank is properly set up.

Cap
Salt Water
5) Turn on the power switch (earth leakage circuit breaker). A
Hosemechanical sound is heard three times immediately after the powerswitch is turned on. This is not a sign of failure.

Salt Water
Tank2) Use the measuring cup (accessory)
to add one level cup (approx.
700ml) of sodium chloride (NaCl)or potassium chloride (KCl) into
the salt water tank.

6) Press the dispense button on the operation panel.

Salt7) The operation lamp comes on.

MeasuringCup3) Add water into the salt water tankup to the 5 L line.
4) Check that the mini cap is closed,and put the cap on the salt watertank. Shake it until sodium chloride
or potassium chloride completely
dissolves in the water.
5) Open the mini cap and put it in therecess, and push in the salt water
hose until the stopper hits the cap.

8) The ready lamp starts flashing, and non-electrolyzed water isdispensed at first.
9) When the unit starts to dispense electrolyzed water of the intended
quality, the ready lamp stays on continuously.
10) Check that the add salt water lamp is off. If it is on, follow “3.
PURGING SALT WATER PUMP” to supply salt water to theelectrolytic cell until the lamp goes off.

Cap11) To stop dispensing water, press the dispense button on theoperation panel again. The ready lamp goes off. The unit goes
through the flush cycle before water stops.

Shake well

* While the ready lamp is flashing, the quality of electrolyzed water
has not reached the intended level. If the available chlorine
concentration and pH value are less than the specified values,
sanitizing water may not provide a sufficient bactericidal effect.

Stopper* Before using electrolyzed water, check that the ready lamp stays on.

3. PURGING SALT WATER PUMP

5. SHUT DOWNThis unit uses a pump to supply salt water. If the salt water pumpcontains air, electrolyzed water cannot be dispensed properly. Whenthe unit is installed for the first time, when the add salt water lamp on
the operation panel comes on, or if the error lamp on the operation
panel comes on and the display on the control panel shows error code
“E53”, purge air from the salt water pump as follows:

1) For daily shutdown, press the dispense button on the operation
panel. The ready lamp flashes for about 3 seconds and the unit
stops dispensing electrolyzed water. To restart the unit, press thedispense button on the operation panel.
2) For long storage, see “9. PREPARING ELECTROLYZER FOR
LONG STORAGE”.

1) Check that there is enough salt water in the salt water tank.
2) Open the door and check that the power switch (earth leakage
circuit breaker) is off. Turn it off if it is on.

6. WATER FAILURE

3) Turn the power switch back on.

In case of water failure, follow the instructions below:

4) Press the display select buttonon the control panel and hold it
down.

Display Select Button

1) Shut down the unit according to “5. SHUT DOWN”.
2) Wait until water supply is resumed.
3) Check that the water supply valve is closed.

5) The pump starts running andpumping up the salt water topurge the salt water hose. It
takes about 20 seconds to purge
a 1.5 m long hose. The sound of
the pump changes from high to
low when the air is removed.

4) Open the drain valve.
5) Open the water supply line shut-off valve. Drain water until no rusty
water comes out.
6) Close the drain valve.

6) Release the display select button when the air is purged.

7) Start up the unit according to “4. START UP”.

* Always locate the salt water tank below the end of the water outlets,or the salt water tank will leak salt water by siphonage and the unit
may fail to operate properly.

37. MAINTENANCE

6) When operating the unit in the pool mode, drain water from bothwater tanks.

WARNING
1. Do not splash water directly onto the unit. It may cause shortcircuit, electric shock, corrosion or failure.

7) To end the flush cycle, press the flush button again for 5 seconds
with the dispense button off. The flush lamp goes off andelectrolyzed water is dispensed from the normal outlets indicating
normal operation.

2. To prevent electric shock, do not touch the attachment
plug, power switch (earth leakage circuit breaker), or otherelectrical parts with damp hands.

[c] CLEANING FILTER AND SALT WATER TANKCAUTION
1. To prevent electric shock or burn, always turn off the powerswitch and unplug the unit before cleaning or inspecting theunit.

1) Prepare a plastic bucket. Pullout the cap, salt water hose andfilter from the salt water tank,and put them into the bucket.

2. Do not use combustible spray or place volatile andflammable substances near the unit. They could catch firefrom a spark of a switch or the like.

Cap
Salt Water
Hose

Salt Water
Tank

IMPORTANTTo prevent damage to the painted or plastic surfaces, do not
use the following: thinner, benzine, alcohol, petroleum, soap
powder, polishing powder, alkaline cleaner, acid, and scouringpad. When using a chemical cloth, follow the instructions of the
manufacturer.

2) Wash the filter attached to the salt water hose with warm water,and remove any dirt or dust to prevent the filter from clogging.
3) Wash the salt water tank with a neutral
cleaner to remove any salt grains or dirt.
Rinse thoroughly.

[a] EXTERIOR

Stopper4) Wipe dry.

* The exterior is powder painted. Wipe it with warm water or a neutral
cleaner, if required. Use a damp cloth to wipe off any cleaner.

5) To refit the salt water hose, fit the cap on thesalt water tank, and insert the filter, then thehose into the hole in the center of the cap.
Push in the salt water hose until the stopper
hits the cap.

* The operation panel, salt water tank, water outlets and remotecontroller are made of plastic. Keep them away from impact or sharpedges.

[d] CLEANING SHOWER NOZZLE (REMOTE CONTROLLER)[b] FLUSHING CLEANING WATER PIPE

When clogged, remove the shower nozzle
as shown and use a toothbrush to clean theshower holes.

IMPORTANT
Scale such as calcium and magnesium forms inside thecleaning water pipe. The use of the cleaning water pipewith scale for a long period of time may prevent the flow ofcleaning water, stop the unit or cause poor performance. To
prevent scale from accumulating, flush the cleaning water pipe
periodically.

Note: To prevent damage to the shower nozzle,
do not use a metal brush or knife.
[e] CHECKING WATER SOFTENER* Flush the cleaning water pipe at least once a month depending onwater quality.

* Check that water from the water softener is soft.
* Check that there is enough salt for refrigeration in the water softener.

1) Follow “4. START UP” and dispense electrolyzed water.

* For other instructions, follow the instruction manual for the watersoftener.

2) Open the door of the unit.
3) When operating the unit in the pool mode, drain water from bothwater tanks.

[f] CLEANING WATER FILTER

4) With the dispense button off, press the flush button for 5 seconds tolight up the flush lamp. Then, press the dispense button to start a
flush cycle. During this operation, cleaning water is dispensed fromthe sanitizing water outlet and sanitizing water from the cleaningwater outlet.
Sanitizing water fromcleaning water outlet

Remove and clean the water filter as required.
Pressure Reducing
Valve (accessory)
Dual Check Valve(accessory)
Water Filter

Cleaning water fromsanitizing water outlet

Water Softener Assembly
Water Softener
Shut-off Valve

Flush Button

Water
Supply5) Dispense electrolyzed water for 2 hours (flushing time may varydepending on how bad the cleaning water pipe is clogged).
Continue to dispense electrolyzed water or use the water during
the flushing operation.

To unitPressure Gauge

4

Drain Valve

Water Supply
Pipe8. INSPECTION

reduction in performance, or failure of the electrolytic cell. If
sampled water is hard, contact an authorized Hoshizaki service
company.

Use a copy of “12. [a] DAILY INSPECTION SHEET” and “12. [b]MONTHLY INSPECTION SHEET” to keep records.

1) Open the water sampling tap. Let water run for more than 5seconds. Sample water in the measuring cup.

[a] pH, AVAILABLE CHLORINE CONCENTRATION (DAILY)
1) Drain more than 1 liter each of sanitizing water and cleaning water.
Sample each water from its outlet into separate containers.

2) Pour one or two drops of the water hardness indicator into themeasuring cup, and stir a little. Check the water hardness (red =hard water, blue = soft water).

2) Use the pH and chlorine test papers to check that each value is
within the following range.

Water
Sanitizing
Cleaning

Note: For details, follow the instructions of the water hardness
indicator.

Test Paper
pH
Available Chlorine
pH test paper UNIV Acidic range—
20 mg/kg (ppm)
Chlorine test paper—
or morepH test paper UNIV Approx. 11—[g] EARTH LEAKAGE CIRCUIT BREAKER (MONTHLY)WARNING
Check the earth leakage circuit breaker for proper operation
once a month. If it is left inoperable, it could increase the risk ofelectric shock in case of electric leak.

* It is not necessary to check the available chlorine concentration ofcleaning water.

Note: See the instruction manual of each test paper for details of its
proper handling.

1) Press the test button of the power switch Test button(earth leakage circuit breaker).

If any of the checked values exceeds the specified range,
contact an authorized Hoshizaki service company.

2) Check that the switch turns off. If not,immediately contact an authorized
Hoshizaki service company.

If water is not dispensed from its proper outlet, contact anauthorized Hoshizaki service company.

OFF[h] EARTH WIRE, ATTACHMENT PLUG (ANNUALLY/BIANNUALLY)[b] SALT WATER LEVEL (DAILY)WARNING
Check periodically that the attachment plug blades and theirvicinity are free of dust and that the attachment plug is securely
plugged into the receptacle. Dusty blades or loose connection
may cause electric shock or fire.

Check the salt water level according to “2. [a] CHECKING AMOUNTOF REMAINING SALT WATER”.
[c] WATER LEAKS (DAILY)
Check the unit and surrounding floor for water leaks. If any is found,contact an authorized Hoshizaki service company.

Check for the following problems:[d] REPLACE CELL LAMP (DAILY)

Problem
The earth wire is broken or loosely
connected.

Check that the replace cell lamp on the operation panel is not flashing.
The service life of the electrode in the electrolytic cell depends onwater quality. To maintain effective performance of electrolyzed
water, the electrolytic cell needs to be replaced every 3000 hours ofoperation.
If the replace cell lamp is flashing, contact an authorized Hoshizaki
service company.

RemedyAsk an authorized Hoshizaki
service company or licensed
electrician for repair.
Immediately ask an
authorized Hoshizaki service
company for repair.
Clean.

The attachment plug or power cord is
too hot, damaged, weighed down, orcaught in.
The attachment plug blades, theirvicinity, and receptacle are dusty.
The attachment plug is plugged into a Plug into a separate
single receptacle with other equipment. receptacle.
The unit shares a single power supply Use a separate power supply.
with other equipment.

[e] CELL RUN TIME, CURRENT, VOLTAGE (AS REQUIRED)To check the cell run time, current, and voltage:
1) Open the door.

[i] CONSUMABLE/PERIODIC REPLACEMENT PARTS

2) Turn on the power switch (earth leakage circuit breaker).
3) Press the display select button on the control panel.

Consumable parts:
pH test paper UNIV		Water hardness indicator4) Press the display select button until the desired item appears in thedisplay.

Periodic replacement parts:
Electrolytic cell (3000 hours)

Chlorine test paper
Neutralizing agent

Note: It is factory adjusted to display the cell run time first.

9. PREPARING ELECTROLYZER FOR LONG STORAGE

5) Close the door.

WARNING
When shutting down the electrolyzer for more than a week, turnoff the power switch (earth leakage circuit breaker), and unplug
the unit to prevent electric leak, heat generation, or ignition.

[f] WATER HARDNESS (WEEKLY)IMPORTANT
Continuous use with hard water may cause clogged pipes,

5

IMPORTANT
Before operating the water electrolyzer next time, check thatthe drain valve is closed and open the water supply line shut-off
valve.

the error code in the display on the control panel.

Lamp Code Problem Possible Cause
RemedyError E11 Inadequate Water failure
Restart the unit after water
water
supply is resumed. See "6.
supplyWATER FAILURE".
Water supplyOpen.
valve is closed

1) Follow the “5. SHUT DOWN” and shut down the unit.
2) Close the water supply line shut-off valve.
3) Drain salt water from the salt water tank and rinse the inside thesalt water tank to remove salt completely with tap water.

* After the problem is resolved, press the dispense button on theoperation panel. The error lamp goes off. Press the dispense button
again to resume operation.

4) Fill the salt water tank with tap water and connect the salt water
hose.

When one of the following error codes appears, immediately contact
an authorized Hoshizaki service company.

5) Follow the “3. PURGING SALT WATER PUMP” to wash the salt
water circuit with tap water. Keep the water running for at least 30
seconds.

Lamp Code
ProblemError E14 Water valve defective
E53 Reversing relay defective
E61 Flow switching valve
defective
None E74 Thermistor defective
E82 Float switch defective6) Disconnect the salt water hose from the salt water tank and drain
the hose. Wipe out the salt water hose and salt water filter with aclean cloth.

Possible Cause

RemedyRepair or replacement isrequired.
Contact an authorized
Hoshizaki service company.

7) Drain the water from the salt water tank.
8) Turn the power switch (earth leakage circuit breaker) off and closethe door.

11. WARRANTY
Hoshizaki warrants to the original owner/user that all Hoshizaki
branded products shall be free of defects in material and/or
workmanship for the duration of the “warranty period”. The warranty
shall be effective for one year from the date of installation.
Hoshizaki’s liability under the terms of the warranty are limited andshall exclude routine servicing, cleaning, essential maintenance and/or repairs occasioned by misuse and installations not in accordancewith Hoshizaki guidelines.

9) Open the drain valve on the back of the unit or remove the drain
cap to drain the remaining water.
10) Open the water supply line drain valve.

10. BEFORE CALLING A SERVICE AGENT

Warranty repairs should be completed by an approved Hoshizaki
dealer or service agency using genuine Hoshizaki components.

If something seems wrong with the unit, check for possible causes
according to the following instructions.
If the problem still exists, turn off the power switch (earth leakage
circuit breaker), unplug the unit, and contact an authorized Hoshizaki
service company.
Only qualified personnel may repair the unit. Do not attempt to repair
it yourself.

To obtain full details of your warranty and approved service agency,
please contact:
e-Water Systems Pty Ltd
TEL : 1300 EWATER
FAX : +61(3) 9686 1377

[a] OPERATIONAL PROBLEMS

ProblemAbnormalnoise

Possible Cause
RemedyOperating sounds No problem.
(water supply,pump)
Unstable
Level the unit.
installation
Contact with other Keep them away from the unit.
objects
Electrolyzed Power failure
Wait until power is resumed.
water is not Unplugged
Plug in.
available
Power switch (earth Turn it on. If it turns offleakage circuit
automatically, there is a risk of
breaker) is off
electric leak. Contact an authorized
Hoshizaki service company.
Operation lamp
Press the dispense button. See "4.
(green) is off
START UP".
Electrolyzed Add salt water lamp Add salt. See "2. [b] SUPPLYING
water is not (red) is on
SALT WATER".
available
Purge the salt water pump. See "3.
PURGING SALT WATER PUMP".
Wet floor
Water leaks
Contact an authorized Hoshizaki
service company.

[b] WHEN ERROR LAMP COMES ON
When the error lamp (red) on the operation panel comes on, check612. INSPECTION SHEET
Make copies of this page.
[a] DAILY INSPECTION SHEET

Date
Time
Sanitizing waterpH

Cleaning water
Neutralizer

Available chlorine concentration*
Salt water level
Neutralizing agent level
Water hardness
Water leaks around unit
Water leaks from water circuit
Cell run time
Checked by* Sanitizing water only
Date
Time
Sanitizing waterpH

Cleaning water
Neutralizer

Available chlorine concentration*
Salt water level
Neutralizing agent level
Water hardness
Water leaks around unit
Water leaks from water circuit
Cell run time
Checked by* Sanitizing water only
Date
Time
Sanitizing waterpH

Cleaning water
Neutralizer

Available chlorine concentration*
Salt water level
Neutralizing agent level
Water hardness
Water leaks around unit
Water leaks from water circuit
Cell run time
Checked by* Sanitizing water only[b] MONTHLY INSPECTION SHEET

Date
Check power switch (earth
leakage circuit breaker)
Flush cleaning water circuit
Date
Check power switch (earth
leakage circuit breaker)
Flush cleaning water circuit

7