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Hoshizaki ROX-20TA-U Instruction Manual

Water electrolyzer
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Download this manual See also: Service Manual
ISSUED:
FEB. 29, 2000
REVISED: APR. 25, 2005
HOSHIZAKI
WATER ELECTROLYZER
ROX-20TA-U
MODEL
INSTRUCTION MANUAL

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Summary of Contents for Hoshizaki ROX-20TA-U

  • Page 1 ISSUED: FEB. 29, 2000 REVISED: APR. 25, 2005 HOSHIZAKI WATER ELECTROLYZER ROX-20TA-U MODEL INSTRUCTION MANUAL...
  • Page 2 HOSHIZAKI provides this manual primarily to assist qualified service technicians in the installation, maintenance and service of the water electrolyzer. Should the reader have any questions or concerns which have not been satisfactorily addressed, please call or write to the HOSHIZAKI Technical Support Department for assistance.

  • Page 3: Table Of Contents

    * Please review this manual. It should be read carefully before the water electrolyzer is installed and operated. Only qualified service technicians should install, service and maintain the water electrolyzer. This manual should be made available to the technician prior to installation, maintenance or service.
  • Page 4 1. WHEN ELECTROLYTIC CELL REPLACE LAMP IS ON -------------------------------- 42 2. WHEN ADD SALT LAMP IS ON --------------------------------------------------------------- 42 3. WHEN SERVICE CALL LAMP IS ON -------------------------------------------------------- 43 [a] CONTACT AUTHORIZED HOSHIZAKI SERVICE COMPANY --------------------- 43 [b] CHECK BY USER ---------------------------------------------------------------------------- 44 4. PROBLEMS WITHOUT ALARM INDICATION ---------------------------------------------- 45...

  • Page 5: Specifications

    I. SPECIFICATIONS 1. NAMEPLATE RATING See the Nameplate for electrical specifications. This Nameplate is located on the lower right hand side of the Rear Panel.

  • Page 6: Dimensions/Connections

    2. DIMENSIONS/CONNECTIONS Unit: inch (mm)

  • Page 7: Construction

    II. CONSTRUCTION 1. GENERAL [10] [11] [12] [13] [1] Display Panel See “II. 3. DISPLAY PANEL“. [2] Lamp Board Board with lamps indicating unit status. [3] Control Box See “II. 4. CONTROL BOX”. [4] Flow Switching Valve Changes the flow direction of electrolytic water. [5] Microswitch [Direction] Senses the direction of the Flow Switching Valve.
  • Page 8 [13] Door Provided with Door Lock. [14] Door Lock Locks the Door. [15] Control Panel See “II. 2. CONTROL PANEL”. [16] Acid Water Outlet Dispenses acid water during the normal operation and alkaline water during the flushing process. [17] Alkaline Water Outlet Dispenses alkaline water during the normal operation and acid water during the flushing process.

  • Page 9: Control Panel

    2. CONTROL PANEL [1] Display Window Displays the operation time, amperage or voltage during the normal operation and error codes in case of trouble. [2] Operation Time Lamp Display Window displays operation time (h) when this lamp is on. [3] Amperage Lamp Display Window displays amperage (A) when this lamp is on.

  • Page 10: Display Panel

    3. DISPLAY PANEL [1] Dispense Button Starts and stops dispensing electrolytic water. [2] Dispensing Lamp (Green) Indicates that the unit is producing water. [3] Ready Lamp (Green) Flashes until the desired settings are achieved and stays on when the unit is dispensing electrolytic water.

  • Page 11: Control Box

    4. CONTROL BOX [1] Switching Regulator Supplies power to start the Programmable Controller, etc. [2] Noise Board Board to remove noise in the unit. [3] Current Sensor Reads amperage in the Electrolytic Cell. [4] Operation Board Board with switches to operate the Control Panel, etc. [5] Magnetic Contactor Switches polarity of the Electrolytic Cell.

  • Page 12: Remote Controller (Option)

    5. REMOTE CONTROLLER (OPTION) [1] Ready Lamp (Green) Flashes until the desired settings are achieved and stays on when the unit is dispensing electrolytic water. [2] Add Salt Water Lamp (Red) Indicates that the Salt Water Tank level is too low. [3] Electrolytic Water Lamp (Green) The upper lamps will function during the normal operation.

  • Page 13: Outlet Valves (Option)

    7. OUTLET VALVES (OPTION) Connected with the Electrolytic Water Outlets (for acid and alkaline water outlets) on the Water Tank. Use as needed. 8. ACCESSORIES Connectors Instruction Manual Gaskets Braided Hoses pH Testers Instruction Sheet Pressure Reducing Valve Salt Measuring Cup Chlorine Tester Water Supply Hose Salt Water Tank...

  • Page 14: Installation And Operating Instructions

    III. INSTALLATION AND OPERATING INSTRUCTIONS 1.CHECKS BEFORE INSTALLATION 1. Remove shipping carton and tape(s). If packaging material is left in the water electrolyzer, it will not work properly. 2. Use potable water. If water other than potable water is used, it may clog pipes, cause poor performance, etc.

  • Page 15: Electrical Connection

    2. Do not install the unit where exposed to humidity or splashing water. Reduction in insulation property may cause an electric leak or shock. Locations should be at least 6” above the floor to avoid splashing water during kitchen cleaning operations.

  • Page 16: Installation Of Water Softener (Sold Separately) And Water Filter (Sold Separately)

    The maximum allowable voltage variation should not exceed ±10 percent of the rated voltage. Operation of the unit outside of this range may cause damage to the unit or reduction of the performance. * Usually an electrical permit and services of a licensed electrician are required. 5.

  • Page 17: [E] Water Supply And Plumbing Connections

    2. The water softener requires a ground that meets the national and local electrical code requirements. To prevent possible electrical shock to individuals or extensive damage to equipment, plug the water softener only into a properly grounded electrical outlet. The maximum allowable voltage variation should not exceed ±10 percent of the rated voltage.

  • Page 18: Installation Of Remote Controller (Option)

    * General piping example for the Water Softener and Water Filter Water Pressure Gauge Drain Outlet Water Softener Drain Outlet for Regeneration Tank Drain Water Supply (Potable water) 6. INSTALLATION OF REMOTE CONTROLLER (OPTION) [a] CHECKS BEFORE INSTALLATION 1) Unpack and remove shipping carton, tape(s) and other packaging material(s). 2) Check that all the necessary accessories are included.

  • Page 19: [C] Set Up

    of the remote controller for extended periods outside of these normal temperature ranges may affect performance. 2. Do not install the remote controller where exposed to humidity or splashing water. Reduction in insulation property may cause an electric leak or shock. 3.
  • Page 20 Bracket. The space between bracket holes is 7” and there are two 8mm holes. 5) Attach the Electrolytic Water Pipes to the Remote Controller after the Remote Controller is installed on the wall. Make sure that there are Gaskets on the end of the Pipes. Remote Controller Fig.

  • Page 21: [D] Electrical Connection

    [d] ELECTRICAL CONNECTION * Usually an electrical permit and services of a licensed electrician are required. 1) Remove the Rear Panel. See “III. 2. HOW TO REMOVE PANELS“. 2) Connect the cable connector on the Remote Controller with the 8P connector on the back of the Control Box.

  • Page 22: [B] Location

    [b] LOCATION 1. These float switches and water tank are not intended for outdoor use. Normal operating ambient temperature should be within +40°F to 95°F (+5°C to +35°C); Normal operating water temperature should be within +40°F to 85°F (+5°C to +30°C).

  • Page 23: [D] Electrical Connection

    1) Drill two attachment holes each in the Acid Water Tank and Alkaline Water Tank to attach the Float Switches. Note: The diameter of the attachment hole for the Float Switches is 9/16”. The minimum vertical distance between two attachment holes is 2-1/2”. See Fig. 10. 2) Remove the fitting nut from each Float Switch.

  • Page 24: Installation Of Outlet Valves (Option)

    6) Remove two blind bushings from the unit base and attach the cables to the unit base using the bushings attached to the Float Switch. See Fig. 14. Note: Use one bushing for 2 cables. 7) Replace the Rear Panel in the original position with screws. White Connector Fig.

  • Page 25: [C] Set Up

    ranges may affect performance. 2. Install an adequate ventilating system. Hydrogen gas or chlorine gas may cause health problems. 1. Avoid a site where dripping is not allowed. Condensation may form on the exterior in high humidity and could drip onto the floor. 2.

  • Page 26: Water Supply And Plumbing Connections

    3) Install the Outlet Valves on the wall using the M4 x 8 Screws (Accessory), etc. depending on the installation condition. Install the Outlet Valves on pipes from each Water Tank. Outlet Valve Inlet is 1/2 Female Pipe Thread (FPT). Note: When mounting the Valves on a wall surface, locate: Acid water valve (yellow pipe) on your right Alkaline water valve (blue pipe) on your left...
  • Page 27 5. Do not install the unit where there is a possibility of freezing. Remove water from the unit if ambient temperature may fall below 32°F (0°C). Frozen water may damage water supply pipes and cause water leakage. 6. Maintain water supply pressure to the unit within 15-115PSIG (0.10-0.78MPa). Excessively low or high water pressure may cause poor performance of acid and alkaline water, trouble or water leakage from the connections.
  • Page 28 * Put the Salt Water Hose through the Cap (Accessory) and push in the Salt Water Hose until the Stopper hits the Cap. See Fig. 19. Note: Install the Remote Controller so that the outlets are located above the Salt Water Filter on the end of the Salt Water Hose.

  • Page 29: [B] Unit With Water Tank, Water Softener & Water Filter

    [b] UNIT WITH WATER TANK, WATER SOFTENER & WATER FILTER 1. Do not run the water electrolyzer until adequate water pressure (15-115PSIG (0.10-0.78MPa)) is reached. 2. The vertical height of the pipe and total length of the pipes for acid and alkaline water should be the same.
  • Page 30 * Water supply inlet is 3/4” MPT. Connect the unit with the Pressure Reducing Valve using the Water Supply Hose (Accessory). Note: Place the Gaskets between the Water Supply Hose and unit water supply inlet and the Pressure Reducing Valve and t i gh t e n p r o p e r ly.
  • Page 31 * Acid and Alkaline Water Discharge Outlet is 1/2” MPT. Note: The vertical length of the pipes for electrolytic water should be a maximum of 80”. The electrolytic water may not be able to flow or the flow rate may not be maintained if the piping length is outside of this range.
  • Page 32 * A water supply line shut-off valve and drain valve should be installed. * The drains must have 1/4” fall per foot on horizontal runs to get a good flow. * The drains should not be piped directly to the sewer system. An air gap of a minimum of 2 vertical inches should be between drain pipe ends and the floor drain, the hose ends from the water electrolyzer and the floor drain, and the water supply line drain valve and the floor drain.

  • Page 33: Operation Mode Setting

    10. OPERATION MODE SETTING Be sure to set the operation mode before operating the unit with the Remote Controller or the Water Tank. Operating the unit without setting the operation mode may lower the performance of the electrolytic water or spilling of acid electrolytic water and/or alkaline electrolytic water.
  • Page 34 11) Press the Display Select Button 5 times to advance to “A6”. This is the stage to set the operation mode. If the Display Select Button is pushed more than 5 times and the Display Window shows a code other than “A6”, continue to push the Display Select Button until “A6”...
  • Page 35 14) When the desired mode appears in the Display Window, press the Set Button once. The mode displayed in the Display Window will stop flashing momentarily. Check that “A6” appears in the Display Window. See Fig. 35. Lighting Flashing Press once. 15) When “A6”...

  • Page 36: Final Check List

    10) Has the power supply voltage been checked or tested against the nameplate rating? 11) Have the water supply line shut-off valve and drain valve been installed? Has the water supply pressure for the ROX-20TA-U been checked to ensure a minimum of 15 PSIG (0.10MPa) and a maximum of 115 PSIG (0.78MPa)?

  • Page 37: Checks Before Operation

    IV. CHECKS BEFORE OPERATION 1. CHECKING AMOUNT OF REMAINING SALT WATER 1) Check that there is enough salt water in the Salt Water Tank. 2) Add salt water following “IV. 2. MAKING SALT WATER” if there is not enough or no salt water in the tank.

  • Page 38: Purging Salt Water Supply Pump

    3) Add water to the Salt Water Tank until water reaches the 5L line. This yields salt water with approximately 13% concentration. 4) Check that the Mini Cap is closed, and put the Cap on the Salt Water Tank. Shake it until sodium chloride salt (NaCl) or potassium chloride (KCl) completely dissolves in the water.

  • Page 39: Operation

    4) Press the Display Select Button and hold it down. 5) The Pump starts running and pumping up the salt water to purge the Salt Water Hose. It takes about 20 seconds to purge a 60” long hose. The sound of the Pump will change from high to low when the air is removed.

  • Page 40: Shut Down

    1) Open the Water Supply Line Shut-off Valve. 2) Check for proper operation of the Water Softener. Note: When using the Water Softener for the first time, supplied water may be yellow due to an outflow of the ion-exchange plastic inside the Water Softener. Open the Water Supply Line Drain Valve and drain supplied water till it is clear.

  • Page 41: Maintenance

    Note: See the Instruction Manual of each test paper for details of its proper handling. If any of the checked values exceeds the specified range, contact an authorized Hoshizaki service company. To order a new supply of test paper, contact an authorized Hoshizaki service company.
  • Page 42 * Flush the Alkaline Water Pipe at least once a month depending on water quality. 1) Follow “V. 1. START UP” and dispense electrolytic water. 2) Open the Door of the unit. 3) Press the Flush Button. The Flush Lamp will light and the flush cycle will start. During this operation, alkaline water is dispensed from the Acid Water Outlet and acid water from the Alkaline Water Outlet.

  • Page 43: Salt Water Tank

    3. CLEANING SALT WATER FILTER AND SALT WATER TANK For cleaning and inspection, turn the power switch off and unplug the unit. There may be water in parts, which may cause an electric shock or burn. 1) Prepare the Salt Water Tank. Remove the Salt Water Hose and Cap from the Salt Water Tank when using the Accessory Salt Water Tank.

  • Page 44: Checking Water Filter

    (For water supply) Water Supply Water Softener * Measure pressure on the water supply side and unit side. Contact an authorized Hoshizaki service company for a filter change if the pressure difference is over 15PSIG (0.1MPa). 6. EXTERIOR Do not splash water directly onto the unit. It may cause a short circuit, electric shock, corrosion or failure.

  • Page 45: Preparing Water Electrolyzer For Long Storage

    7. PREPARING WATER ELECTROLYZER FOR LONG STORAGE Remove water from the unit if the unit is not used for more than a week. Foul water may damage the unit. Before operating the water electrolyzer next time, check that the Drain Valve is closed and open the Water Supply Line Shut-off Valve.

  • Page 46: Trouble Shooting

    2900 hours. Electrolytic water can still be dispensed. * When the unit reaches 3000 hours, the Electrolytic Cell Replace Lamp stays on and the Service Call Lamp starts flashing. Be sure to contact an authorized Hoshizaki service company. 2. WHEN ADD SALT LAMP IS ON Contact an authorized Hoshizaki service company when problems cannot be handled by a user.

  • Page 47: When Service Call Lamp Is On

    2. When abnormal situations occur, turn the Power Switch off and unplug the unit or turn off the main power and contact an authorized Hoshizaki service company. Continuous operation with problems may cause an electric shock or fire.

  • Page 48: [B] Check By User

    [b] CHECK BY USER Error Lamp Error Code Service Call Lamp Possible Cause and Countermeasure Not sufficient water supply. (1) Is the Water Supply securely connected? Resume water supply. (2) Are the outlets for electrolytic water clearly open? Remove the cause(s) that is closing the outlets. (3) Are hoses to connect the unit with Remote Controller or Water Tank bent ? Remove the cause(s) that is bending the hoses.

  • Page 49: Problems Without Alarm Indication

    (1) Noise from water supply and pump. This is normal. (2) Installed on an unsteady floor. Contact an authorized Hoshizaki service company. (3) Not leveled in the left-to-right or front-to-rear directions. Contact an authorized Hoshizaki service company. Possible Cause and Countermeasure (3) Is the salt water concentration too low? Add salt to the Salt Water Tank and adjust the concentration.

  • Page 50: Daily Inspection Sheet

    VIII. DAILY INSPECTION SHEET * Make copies of this page. Date Time Acid water Alkaline water Available chlorine concentration (mg/L) Water supply temp. (°F) or (°C) Cell operating time (h) Responsible person Date Time Acid water Alkaline water Available chlorine concentration (mg/L) Water supply temp.
  • Page 51 HOSHIZAKI AMERICA, INC. 618 HIGHWAY 74 SOUTH PEACHTREE CITY, GA 30269 U.S.A. PHONE: 770-487-2331 www.hoshizakiamerica.com 91U8AA10C...

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