De Nora MIOX 1.0 Series User manual

MIOX® 1.0 and 2.0 Operators Manual Page 1
MIOX® 1.0 and 2.0 Series On-Site
Chemical Generator
Installation, Operation, and Maintenance
Manual
31 Jan, 2020

MIOX® 1.0 and 2.0 Operators Manual
Page 2
De Nora Water Technologies (DNWT) maintains a constant product improvement program
that may affect design and/or specifications. The company reserves the right to make these
changes without prior notice or liability. Portions of the MIOX® OSGs are covered by U.S.
Patent
Customer Service
Toll free Product/Tech Support
T: 1.800-646-9426, option 2
Tech Support
C: 1.505-377-5879
Email
[email protected]
Web Support
https://info.denora.com/contact-miox-service-1
International distributors and sales agents located worldwide

MIOX® 1.0 and 2.0 Operators Manual
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CONTENTS
List of Figures.........................................................................................................4
List of Tables ..........................................................................................................4
INTRODUCTION AND OVERVIEW............................................................................ 5
Regulatory Compliance ............................................................................................5
U. S. Environmental Protection Agency (US EPA) .....................................................5
List of Certifications..............................................................................................5
NSF International.................................................................................................5
State Approvals ...................................................................................................5
System Description .................................................................................................6
System Illustrations and Component Descriptions .......................................................7
INSTALLATION AND STARTUP.............................................................................. 14
SAFETY PRECAUTIONS AND WARNINGS................................................................14
In the Box.........................................................................................................14
What you need .....................................................................................................14
Tools for install ..................................................................................................15
Installation Location Requirements.......................................................................15
Connections .........................................................................................................16
Plumbing...........................................................................................................16
Electrical ...........................................................................................................16
Installing the MIOX® 1.0 or 2.0 ..............................................................................19
Startup Tips ......................................................................................................21
OPERATION AND MAINTENANCE .......................................................................... 22
Normal Operation..................................................................................................22
Interface elements .............................................................................................22
Communications ................................................................................................24
Troubleshooting ....................................................................................................25
Fault Conditions .................................................................................................25
Resolving Software Faults ................................................................................... 25
General Troubleshooting .....................................................................................26
Maintenance.........................................................................................................29
General Plumbing Checks ....................................................................................29
Changing Peristaltic Pump Tubes..........................................................................29
Cell Replacement ...............................................................................................30

MIOX® 1.0 and 2.0 Operators Manual
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APPENDICES ........................................................................................................ 34
Inline Pressure Reducer/Switch...............................................................................35
MIOX® 1.0 and 2.0 OSG General Arrangement.........................................................36
Changing Pump Tubes ...........................................................................................38
Water Quality Guidelines........................................................................................44
MIOX® 1.0 and 2.0 OSG Spare Parts Identification/Ordering Guide............................. 45
List of Figures
Figure 1: MIOX® 1.0 and 2.0 On-Site Chemical Generator (tabletop model)......................6
Figure 2: Generic diagram of a MIOX® 1.0 or 2.0 OSG with necessary components ...........7
Figure 3: MIOX® 2.0 lb. OSG with labeled system components......................................10
Figure 4: MIOX® 2.0 lb. OSG showing cells, thermowells, and I/O panels .......................11
Figure 5: MIOX® 1.0 or 2.0 OSG I/O panels with labeled components ............................12
Figure 6: One of two level switches before being installed in an oxidant tank...................13
Figure 7: Inline Pressure Reducer & Switch assembly ...................................................13
Figure 8 Alarm Relay Connector Wiring .......................................................................17
Figure 9: MIOX® 1.0 or 2.0 OSG Connections. ............................................................18
Figure 10: LED Indicator meanings.............................................................................22
Figure 11: MIOX® 1.0 and 2.0 OSG with system cover and screw locations ....................32
Figure 12: Internal Top View of MIOX® 1.0 and 2.0 OSG Showing Cell Hour Reset Button
Location..................................................................................................................33
List of Tables
Table 1: Fault conditions descriptions .........................................................................25
Table 2 : General troubleshooting approaches .............................................................28
Table 3: Cell Replacement Tools Required ...................................................................30

MIOX® 1.0 and 2.0 Operators Manual
Page 5
INTRODUCTION AND OVERVIEW
This manual is intended to provide basic installation, operation, and maintenance guidelines
for the operator of the MIOX® 1.0 and 2.0 on-site generator (OSG). Variations between
model types may cause the images in this manual to not directly reflect the setup of every
unit.
Properly operating and maintaining the system will increase cell life and overall system
performance. If you encounter problems or have questions not covered in this manual,
please contact De Nora WT Service at 1-800-646-9426.
Regulatory Compliance
U. S. Environmental Protection Agency (US EPA)
On-site generated oxidants are listed as a compliance technology for water disinfection. To
be listed as a compliance technology, the system must be cost effective and achieve
compliance with the regulated maximum contaminant levels (MCLs), and the operator must
be capable of reliably operating the technology. The on-site oxidant category was added to
this list in 1997 primarily based on independent research of De Nora WT.
List of Registrations
EPA Establishment Number: 48482-TX-001
NSF International
De Nora WT maintains a policy of verification and compliance of De Nora WT for water
applications. The NSF Standard provides the criteria used to evaluate the public health
safety of materials, components, products, or systems that contact drinking water, drinking
water chemicals, or both. For details of specific NSF standards for specific MIOX®
equipment, please consult with De Nora WT. NSF listings are also available through NSF
International at (800) NSF-Mark or their web site at www.nsf.org.
State Approvals
De Nora WT maintains a policy of obtaining state regulatory approval in all states where
MIOX® equipment is installed and operated. De Nora WT has never been rejected for
approval in any state. For a complete list of states currently approving on-site oxidant
technology, please contact De Nora WT.
European Union Conformity
The MIOX® 1.0 and 2.0 systems comply with the protection requirements of EU Council
Electromagnetic Compatibility (EMC) Directive 2014/30/EU and Low Voltage Directive (LVD)
2014/35/EU, as well as meet the requirements of EU Council Directive 2011/65/EU on the
restriction of the use of certain hazardous substances in electrical and electronic equipment
(“RoHS recast” or ”RoHS 2”). The full text of the system EU declaration of conformity is
included in the document kit along with this manual and can also be provided on request.

MIOX® 1.0 and 2.0 Operators Manual
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System Description
The MIOX® 1.0 and 2.0 system is an on-site chemical generator that creates mixed oxidant
solution from water, salt, and electricity. The system can create either 1.0 lb. or 2.0 lbs. of
Free Available Chlorine (FAC) per day, depending on the model ordered. When producing
oxidant, the MIOX® system is automatically controlled by a pair of level switches inside the
oxidant storage tank.
Mixed oxidant solution is a powerful hypochlorite-based disinfectant with improved biological
kill efficacy that achieves more rapid and thorough inactivation of a wide range of microbial
contaminants.
Figure 1: MIOX® 1.0 and 2.0 On-Site Chemical Generator (tabletop model)

MIOX® 1.0 and 2.0 Operators Manual
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System Illustrations and Component Descriptions
Figure 2: Generic diagram of a MIOX® 1.0 or 2.0 OSG with necessary components
MIOX® 1.0 and 2.0 OSG
On-site mixed oxidant generator (OSG).
Water supply
Fresh water supply for the OSG. Runs through Inline Pressure Reducer assembly before
connecting to OSG.
Brine supply
Low-pressure supply of saturated brine to the OSG.
Oxidant
Tank
Level Switch
Assembly
(installed)
MIOX® 1.0 or 2.0 OSG
Hydrogen Vent
(must vent
outside)
Brine Tank
Inline Pressure
Reducer/Switch
(connect to water supply)
Level Switch
Assembly
(installed)
Brine Supply

MIOX® 1.0 and 2.0 Operators Manual
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Oxidant Tank
Vented oxidant solution storage tank for OSG output.
Hydrogen Vents
Upward-sloping piping connected to outside environment for venting potentially dangerous
hydrogen gas (See Hydrogen Safety White Paper).
Level Switch Assembly
Assembly of two level switches and a level switch cable. The level switches control the OSG
when installed in the oxidant tank. The 15’ cable connects the level switches, and pressure
switch to the OSG. See Figure 2 for details. Note: The level switches are orientation-
sensitive and must be installed with the arrow pointing upward in order to function properly.
System Cover
A rigid plastic housing that covers and protects the key components of the MIOX® 1.0 or
2.0 OSG.
LCD Display
Visual Display with a cycling menu of system status and operational parameters. See Figure
3 for details.
LED Indicator
A multi-color LED which displays system status. See Figure 3 for details.
Electrical Enclosure
An actively-cooled aluminum box housing the control board, power supplies and other
electronic components of the MIOX® 1.0 or 2.0 OSG System. See Figure 3 for details.
Brine Pump
An automated peristaltic pump which controls the system’s brine flowrate and acts as a
check valve to prevent brine supply dilution. Capable of withstanding up to 10 PSI of
pressure. See Figure 3 for details.
Water Pump
An automated peristaltic pump which controls the overall system flowrate and acts as a
check valve to prevent oxidant from flowing into the water supply. Capable of withstanding
up to 10 PSI of pressure. See Figure 3 for details.
MIOX® 1.0 or 2.0 Electrolytic Cell
A proprietary electrolytic cell manufactured by De Nora WT produces 1.0 lbs of FAC per day
of runtime. 1 lb. MIOX® OSGs use one cell while 2 lb. MIOX® OSGs use two cells. See
Figure 4 for details.
Thermowells
In-line temperature sensors used to evaluate operational efficiency of the system. See
Figure 4 for details.

MIOX® 1.0 and 2.0 Operators Manual
Page 9
Electrical Back Panel
All of the unit’s electrical connections, including the power switch, system fuse, IEC power
receptacle, and connectors for the Level Switch Assembly, a USB jump drive, and an
Ethernet cable. See Figure 5 for details.
Plumbing I/O Panel
3 barb fittings for connecting the water supply, brine supply and oxidant outlet. See Figure
5 for details.
Hydrogen Vent Kit
Kit of parts consisting of an oxidant tank inlet, drop tube assembly, warning labels and a
vent strainer. Refer to the Oxidant Tank Manual for details.
Inline Pressure Reducer & Switch Kit
Assembly to reduce line pressure to an appropriate pressure for the OSG. Additionally, the
Kit includes a Pressure-Switch that connects to the level switch assembly. This switch will
shut the unit down to prevent damage if the system loses feed-water pressure. The kit has
a female ¾” NPT inlet connection. See Figure 7 and Appendices for details.
Integrated Brine Tank (Optional)
Optional integrated tank with automatic brine generation system designed explicitly for the
MIOX® 1.0 and 2.0. See Integrated Brine Tank Manual for installation and operation.
NOTE: For items not listed above see the appendices and
Documentation Kit. Additional items may include, but are not limited
to the oxidant tank, hydrogen vent, oxidant pump, water heater and
water chiller. Contact De Nora WT for additional details on available
options.

MIOX® 1.0 and 2.0 Operators Manual
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Figure 3: MIOX® 2.0 lb. OSG with labeled system components.
(System cover not shown)
LCD Display
LED
Indicator
Water
Pump
Brine Pump
Electrical
Enclosure
Check
Valve

MIOX® 1.0 and 2.0 Operators Manual
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Figure 4: MIOX® 2.0 lb. OSG showing cells, thermowells, and I/O panels
(Alarm Relay connection not shown)
Electrical Back
Panel
Thermowells
(T-shaped elements in
plumbing line)
2 MIOX®
Electrolytic Cells
Plumbing I/O
Panel

MIOX® 1.0 and 2.0 Operators Manual
Page 12
Figure 5: MIOX® 1.0 or 2.0 OSG I/O panels with labeled components
Power Entry
Module
USB Port for
data logging
Ethernet Port
Fuse Holder
ON/OFF Switch
Oxidant Outlet
Water Inlet
Brine Inlet
Level Switch Assembly
Connection
Alarm Relay
Connection

MIOX® 1.0 and 2.0 Operators Manual
Page 13
Figure 6: One of two level switches before being installed in an oxidant tank
Figure 7: Inline Pressure Reducer & Switch assembly
TO OSG
CONNECTION
TO OSG
PLUMBING
TO FEED
WATER
TO LEVEL
SWITCH CABLE

MIOX® 1.0 and 2.0 Operators Manual
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INSTALLATION AND STARTUP
The MIOX®1.0 and 2.0 OSG has been factory tested and must be properly installed per the
instructions in this manual.
SAFETY PRECAUTIONS AND WARNINGS
Ensure that the facility and the installation are in conformance with all codes
and standards.
Please refer to the Hydrogen Safety White Paper or your local authority
having jurisdiction for more information.
A liquid barrier system is mandatory. Ensure that all hydrogen vent lines
slope towards the oxidant tank.
Ensure that no valves, drop legs, or P-traps are in the hydrogen vent lines.
Do NOT cross connect vent lines.
Ensure that brine and oxidant tanks are labeled properly.
Disconnect power before working on the system. Do not reconnect the power
to the rear panel until installation is complete.
All MIOX® OSG systems require a good earth ground. A neutral is not a
substitute for a proper earth ground. Electrical wiring to all MIOX® OSG
systems should be performed by a certified electrician.
In the Box
1) MIOX® 1.0 or 2.0 OSG
2) MIOX® 1.0 or 2.0 Quickstart Guide
3) MIOX® 1.0 or 2.0 Installation, Operation, and Maintenance Manual
4) Documentation Kit
5) Power Cord
6) Standard Parts Kit
a. Level Switch Assembly (comes pre-installed if an Oxidant Storage Tank was
ordered from DeNora WT)
b. Tubing and hose clamps
7) Integrated Brine Tank (if ordered)
8) Oxidant Storage Tank (if ordered)
9) Inline Pressure Reducer & Switch Kit
10)Hydrogen Vent Kit (comes partially pre-installed if an Oxidant Storage Tank was
ordered from DeNora WT)
What you need
To install the MIOX® 1.0 or 2.0 OSG System, you need:
Safety
Advisory

MIOX® 1.0 and 2.0 Operators Manual
Page 15
1) MIOX® 1.0 or 2.0 OSG
2) 5 foot by 5 foot indoor environment
3) 110-240 VAC 10A circuit with standard grounded wall plug
4) Saturated Brine Supply (see Salt Quality Guidelines for salt specifications)
5) Fresh Water Supply (see Appendices for Water Quality Guidelines)
6) Oxidant Storage Tank with Hydrogen Venting (see Hydrogen Safety White
Paper for details)
7) Tubing and hose clamps (provided with OSG)
8) Level Switch Assembly (provided with OSG)
9) Inline Pressure Reducer & Switch Kit
10)Power Cord (provided with OSG)
Tools for install
The MIOX® 1.0 or 2.0 can be installed without any tools, although it is recommended to use
a pair of pliers to tighten the hose clamps on the plumbing I/O panel.
Refer to the Integrated Brine Tank Manual for tools needed to install the Integrated
Brine Tank.
Refer to the Oxidant Tank Manual for tools needed to install the Level Switch Assembly.
Installation Location Requirements
The MIOX® 1.0 or 2.0 OSG must be installed indoors on a flat level surface approximately 5
feet long by 5 feet wide (1.52m by 1.52m). The ambient air temperature at the installation
location must be between 40°F (5°C) and 110°F (43°C). Additional space may be required
for the water, brine, and oxidant tanks. DeNora WT recommends placing the OSG and tank
near an available drain for ease of draining the tank or in case of minor overflows.
Additionally, DNWT recommends placing the MIOX® 1.0 or 2.0 near an external wall for
ease of hydrogen venting as described in the Hydrogen Safety White Paper. Refer to the
Appendices of this document for a general arrangement with critical installation
dimensions.
NOTE: Failure of the system that can be traced to improper
temperature conditions is not covered under the DeNora Water
Technologies warranty.

MIOX® 1.0 and 2.0 Operators Manual
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Connections
Plumbing
The MIOX® 1.0 or 2.0 has three barbed plumbing connections on the plumbing I/O panel:
water inlet, brine in, and oxidant out. The ¼” barbed water inlet must be connected to the
appropriate location on the included Inline Pressure Reducer Kit. The ¼” barbed brine inlet
must be connected to an unpressurized saturated brine supply.
If using the integrated brine tank with the MIOX® 1.0 or 2.0 OSG, the water and
brine inlets will connect to the labeled water and brine outlets on the integrated
brine/water tank. Please refer to the Integrated Brine Tank Manual for more
details.
The 3/8” barbed oxidant outlet must be connected to an oxidant tank and a hydrogen vent
line. All barb fittings must be secured with the included hose clamps.
Only supply the MIOX® 1.0 or 2.0 OSG brine (fully-saturated salt water) and
fresh water. Feeding other solutions instead of brine and water can cause
severe damage to the equipment or operator. Follow Salt Guidelines for salt
quality used in operating on-site generation equipment.
For direct injection applications, the OSG can inject into a maximum of 10PSI.
Electrical
The MIOX® 1.0 or 2.0 OSG requires only power, pressure, and level switch connections for
normal operation. The included 10 foot power cord connects the system to 110-120 VAC
and should be connected to the standard IEC receptacle on the electrical back panel. For a
220-240 VAC connection, replace the supplied power cord with a 10A rated 220VAC IEC
Cable (220VAC cable not provided by DNWT).
All MIOX® 1.0 or 2.0 OSG systems ship with a pre-installed 2A or 4A fuse, depending on
model. A spare fuse is also included with the unit.
NOTE: Failure of the system that can be traced to a poor power source
is not covered under the DNWT warranty.
The level switches should be installed in the oxidant tank as described in the GA drawing
or Oxidant Tank Manual. The level switch cable is keyed so there is only one orientation
that matches the connectors on the back panel. Without level switches plugged in, the OSG
will never operate and instead will remain in ‘Standby’ mode.
When installing the level switches, connect the Pressure switch connector located on the
Inline Pressure Reducer & Switch Kit to the matching connections on the Level Switch Cable
and the back of the OSG, respectively. Once connected, the pressure switch should be in
series with the upper level switch wiring. Refer to Figure 7 for additional detail. As of
Revision 4, the system will not operate without this connection in-place.
Safety
Advisory

MIOX® 1.0 and 2.0 Operators Manual
Page 17
Alarm Relay
The MIOX® 1.0 or 2.0 OSG is equipped with an alarm relay that provides two sets of
normally open dry contacts. This relay is tripped whenever the system encounters a fault
and can be used to send signal to various forms of alarm systems (audible, plant status,
etc.) depending on the user’s preference. Refer to Figure 8 for wiring details, and to the
Communications Section of this manual for additional description of the Alarm Relay
functionality.
Figure 8 Alarm Relay Connector Wiring
All MIOX® systems require a good earth ground. A neutral is not a substitute
for an earth ground. Electrical wiring to all MIOX® units should be wired on a
separate circuit from other power devices, like pumps, etc. DNWT cannot be
held responsible for systems wired improperly that do not meet UL or National
Electrical Code (NEC) requirements. If the system is improperly grounded, the
DNWT warranty is void. If a local code requires a GFI (Ground Fault
Interrupter) circuit breaker, it is the responsibility of the customer to install
the GFI to meet local code requirements.
Safety
Advisory
TO REAR
OF OSG

MIOX® 1.0 and 2.0 Operators Manual
Page 18
Figure 9: MIOX® 1.0 or 2.0 OSG Connections.

MIOX® 1.0 and 2.0 Operators Manual
Page 19
Installing the MIOX® 1.0 or 2.0
1) Unpack The Boxes
Unpack the MIOX® 1.0 or 2.0 OSG and all included components.
2) Position the OSG
Tabletop configuration: Place the MIOX® OSG on a flat, level surface.
Integrated Brine Tank configuration: Place the MIOX® OSG on the integrated
brine tank by following instructions in the Integrated Brine Tank Manual.
3) Install Inline Pressure Reducer & Switch Assembly
Following the instructions in the Appendices for installing the Inline Pressure
Reducer, connect the water source to the water inlet of the OSG through the Inline
Pressure Reducer. Plug-in the pressure switch assembly into the UPPER level switch
connection on the back of the OSG
4) Install Softener System
Install water softener system (and any other source-water conditioning equipment).
Refer to 102-00151 for detailed instructions on installing softener systems supplied
by DNWT.
5) Connect Water Source
Tabletop configuration:
Connect water source to brine source.
Integrated Brine Tank configuration:
Connect pressurized water source to the brine tank using the 1/4” diameter LDPE
tubing. Secure with hose clamps. Leave valves closed.
6) Connect Water & Brine Inputs to OSG
Use the smaller diameter clear vinyl tubing to connect the water and brine feeds to
the OSG. Secure with hose clamps. Leave valves closed.
7) Load Salt
Load the brine tank with salt. If Integrated Brine Tank was ordered from DNWT,
follow instructions in the Integrated Brine Tank Manual.
NOTE: Only use salt that meets or exceeds the salt quality
specifications in the MIOX Salt Guidelines.
8) Connect Oxidant Tank
Connect the oxidant outlet on the OSG to the oxidant tank using the larger diameter
clear vinyl tubing and hose clamps. If Oxidant Storage Tank was ordered, follow
installations instructions in the Oxidant Tank Manual.

MIOX® 1.0 and 2.0 Operators Manual
Page 20
9) Install Level Switch
Plug the level switch assembly cable into the Pressure Switch and electrical I/O panel
of the OSG. Follow installations instructions in the Oxidant Tank Manual for the
Level Switch Assembly installation.
NOTE: Oxidant tank level switches must be installed correctly for the
system to operate.
10)Hydrogen Venting
Install hydrogen venting in the oxidant tank. Hydrogen must be vented outdoors.
Follow the Hydrogen Vent Kit instructions in the Oxidant Tank Manual and
Hydrogen Safety White Paper.
11)Attached Power Cord
Attach power cord to IEC on the back panel of OSG. Connect to 220-240 VAC. For a
220-240 VAC connection, replace the supplied power cord with a 10A rated 220VAC
IEC Cable (220VAC cable not provided by DNWT).
12)Open Valves on OSG
Open the water and brine feed valves on the OSG.
13)Open Water Source Valve
Open the facility water source valve.
14)Brine Saturation
Wait 30 minutes to 1 hour to allow brine to fully saturate before turning system on.
15)Turn System On
Turn on the unit by switching the power switch on the back panel. The MIOX® OSG
will enter into a priming cycle. MIOX® OSG will automatically start producing oxidant
after the system has completed the priming cycle.
NOTE: Visually verify that water and brine are being delivered to the
plumbing I/O panel on the back of the OSG.
If water and/or brine are not visibly entering the OSG at the end of the priming
cycle, restart the priming cycle by turning the unit off, waiting 5 seconds, then
turning the unit on again. Wait for the priming cycle to end and then repeat this
process until both water and brine are successfully delivered to the plumbing I/O
panel. Refer to the troubleshooting guide located within this manual if system does
not start after priming cycle.