Hoshizaki ROX-20TA-U service manual Principle of Strong Acid Water Generation

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5. PRINCIPLE OF STRONG ACID WATER GENERATION

Strong acid water is generated at the anode inside the Electrolytic Cell where the membrane divides the anode and cathode, by electrolyzation of 0.1% or less salt water. See the figure below.

At the anode, chlorine ion (Cl-) generates chlorine gas which reacts with H2O to generate chloride and hypochlorous acid (HOCl). H2O is also electrolyzed at the anode to become oxygen (O2) and hydrogen ion (H+). Eventually, the anolyte pH falls below 2.7, the oxidation- reduction potential (ORP) rises significantly, and the available chlorine concentration reaches 20 - 60 mg/L.

[Reaction Formula]
Anode	H2O	1/2O2 + H+ + 2e-
	2Cl-	Cl2 + 2e-
	Cl2(aq) + H2O		HCl + HOCl
Cathode	H2O + 2e-		1/2H2 + OH-

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Contents Model ROX-20TA-U Contents General Information Safety Instructions U8AA5540012 Product Information DIMENSIONS/CONNECTIONS Features of Strong Acid Water Principle of Strong Acid Water Generation II. Construction General U8AA5540012 Control Panel Display Panel Control BOX Outlet Valves Option Remote Controller OptionWater Tank Float Switches Option U8AA5540012 Adjustment Procedure A1 Cell LifecycleLighting A2 Amperage A3 VoltageA4 Cell Reverse Time A5 Amperage Accumulation TimeA6 Storage Mode/Hand-washing Mode A7 Cell Running/Reverse Time Reset A8 Initial Flush Cycle TimeA9 Automatic Dispensing Control Functions and Adjustment of Check Items Checking ProcedureLighting Flashing C1 Output Conditions C2 Input ConditionsOperation Flow Chart Set CheckIV. Technical Information Water Circuit Wiring Diagram Performance Data PH and Amperage Service Information MAINTENANCE/INSPECTION Acid Water pH, Alkaline Water pH No Available Chlorine Concentration Acid NoThiosulfuric Acid Titration Cell Replace Lamp NoService Diagnosis Cartridge Filter NoU8AA5540012 U8AA5540012 MINAMIYAKATA, SAKAE, TOYOAKE, Aichi 470-1194 Japan