AmeriWater MediQA MSP Series Manual

AmeriWater
The Water Purification Specialists
Operation & Maintenance Manual
3345 Stop 8 Rd, Dayton, OH 45414 | 800 535 5585 | www.ameriwater.com 98-0157 Rev K
Manufactured With Pride in The USA
MediQA
Reverse Osmosis System
MODELS MSP AND MDP

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TABLE OF CONTENTS
1. CONTACT DETAILS ..................................................................................................... 4
2. INTRODUCTION AND SAFETY INFORMATION ............................................................... 5
2.1 INDICATIONS FOR USE......................................................................................... 5
2.2 CONTROLS........................................................................................................... 5
2.3 ALARMS AND MAINTENANCE................................................................................. 5
2.4 CAUTION AND WARNING STATEMENTS ................................................................. 6
2.5 GENERAL SAFETY INFORMATION........................................................................... 7
3. STANDARD FEATURES ...............................................................................................10
3.1 MEDIQA STANDARD FEATURES ............................................................................10
3.2 ELECTRICAL SPECIFICATIONS / CONNECTIONS.....................................................10
3.2.1 Mains supply.................................................................................................10
3.2.2 USB Connection Details..................................................................................10
3.3 ENVIRONMENTAL ................................................................................................11
3.4 STANDARDS APPLIED ..........................................................................................11
3.5 SPECIFICATION DATA..........................................................................................12
3.6 PERFORMANCE PARAMETERS ...............................................................................13
4. OPERATIONAL OVERVIEW..........................................................................................14
4.1 MEDIQA BASIC OPERATION .................................................................................14
4.2 SEQUENCE OF OPERATIONS.................................................................................16
4.2.1 Introduction..................................................................................................16
4.2.2 High Recovery Mode......................................................................................17
4.2.3 Standard Recovery Mode ...............................................................................18
4.2.4 Heatsan Fill Procedure ...................................................................................18
4.2.5 Cleaning Procedure........................................................................................20
4.2.6 Disinfection Procedure ...................................................................................21
5. INSTALLATION..........................................................................................................23
5.1 ENVIRONMENT....................................................................................................23
5.2 UNPACKING ........................................................................................................23
5.3 CONNECTIONS ....................................................................................................23
5.3.1 Electrical Supply............................................................................................23
5.3.2 Water connections.........................................................................................23
5.3.3 Drainage.......................................................................................................23
5.4 COMMISSIONING ................................................................................................24
5.4.1 Pretreatment Lockout ....................................................................................24

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5.4.2 Heatsan Water Loss Lockout ..........................................................................24
5.4.3 Alarm Panel Connections................................................................................25
5.4.4 Installation Kit Details....................................................................................25
6. OPERATOR INTERFACE ..............................................................................................33
6.1 OPERATIONS MENU.............................................................................................33
6.1.1 OPERATION MENU screen..............................................................................34
6.1.2 Operation Periods..........................................................................................36
6.2 MAIN MENU ........................................................................................................37
6.2.1 VIEWER button .............................................................................................37
6.2.2 ACTIVITY DETAILS button .............................................................................38
6.2.3 ACTIVITY LOG button....................................................................................39
6.2.4 STATUS MONITOR button..............................................................................39
6.2.5 ALARMS button .............................................................................................40
6.2.6 ALARM LOG button........................................................................................41
6.2.7 DIAGNOSTICS button ....................................................................................41
6.3 OPERATION MENU screen ....................................................................................42
6.4 SETTINGS MENU screen.......................................................................................42
6.4.1 RO SUPPLY button.........................................................................................43
6.4.2 RO CLEAN button ..........................................................................................46
6.4.3 RO HEAT DISINFECT button...........................................................................47
6.4.4 ACTIVITY LOG button....................................................................................48
6.4.5 ALARMS button .............................................................................................48
6.4.6 CLOCK button ...............................................................................................49
6.5 CALIBRATION MENU............................................................................................50
6.5.1 FLOW METERS button ...................................................................................51
6.5.2 RO PARAMETERS button................................................................................51
6.5.3 ALARM SETTINGS button...............................................................................52
6.5.4 LINE CELLS button ........................................................................................52
6.5.5 RO HEAT DISINFECT button...........................................................................52
6.5.6 CHEMICAL CLEAN button ...............................................................................53
6.5.7 OVERRIDES button........................................................................................54
6.5.8 DIAGNOSTICS button ....................................................................................54
6.5.9 SYSTEM button .............................................................................................55
7. FAULTS AND FAULT FINDING .....................................................................................56
8. SANITIZING & CLEANING...........................................................................................61

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8.1 EXTERIOR SURFACE CLEANING ............................................................................61
8.2 CHEMICAL CLEANING ..........................................................................................61
8.2.1 Method:........................................................................................................62
8.3 APPROVED CHEMICALS........................................................................................63
8.4 RO HEAT DISINFECTION PROCEDURE...................................................................63
8.4.1 Manual RO Heat Disinfection ..........................................................................64
8.4.2 Automatic RO Heat Disinfection ......................................................................64
9. MAINTENANCE ..........................................................................................................65
9.1 THERMOSTAT TESTING .......................................................................................65
9.2 FAULTY ITEMS ....................................................................................................66
9.3 MEDICAL DEVICE TRACEABLE COMPONENTS.........................................................67
9.4 REPLACEMENT PART HISTORY LOG SHEET............................................................68
10. FLOW DIAGRAMS....................................................................................................69
11. WIRING SCHEMATIC ...............................................................................................71
12. COMPONENT IDENTIFICATION ................................................................................87
13. APPENDIX ..............................................................................................................88
13.1 DEFAULT SETTINGS LIST FOR SINGLE AND DUAL PASS MediQA..........................88
13.2 IFU –Updating Mitsubishi FX3G PLC Software with the FX3G-EEPROM-32L Module90
13.3 IFU –Updating Mitsubishi GOT1000 HMI Software w/Jump Drive .........................93

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1. CONTACT DETAILS
We trust the unit meets all your expectations but in the event of any problems
please do not hesitate to contact us as follows:
For all spares and consumables contact:
Customer Service Tel No: 1-800-535-5585
For all service or technical support contact:
Technical Support Tel No: 1-800-535-5585
Web address: www.ameriwater.com
(Or your local authorized AmeriWater dealer)
Useful Telephone Nos.
Tel No………………………………Contact Name:……………………………….
Tel No………………………………Contact Name:……………………………….

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2. INTRODUCTION AND SAFETY INFORMATION
2.1 INDICATIONS FOR USE
The AmeriWater MediQA Reverse Osmosis System is one component of a water treatment
system designed to pre-treat and purify potable water using reverse osmosis for making
dialysate for hemodialysis applications. The device is intended to be a component in a complete
water purification system, and is not a complete water treatment system. It must be preceded
by pre-treatment devices, and may need to be followed by post-treatment devices as well to
meet current AAMI and Federal (U.S.) standards. The AmeriWater MediQA is intended for use in
water rooms in a hospital, clinic, or dialysis center. The device includes an integrated heat
sanitization process.
The MediQA is available in both single pass and double pass models that supply from 5.5 to
12.0 gallons per minute (gpm) of product water. Model MSP2 is a single pass, dual-membrane
RO that produces up to 9 gpm of product water. Model MSP3 is a single pass, 3-membrane RO
that produces up to 12 gpm of product water. Model MDP2 is a double pass, 3-membrane RO
that produces up to 5.5 gpm of product water. Model MDP4 is a double pass, 5-membrane RO
that produces up to 10.0 gpm of product water.
The MediQA is a Medical Device; as such modifications to the device are not
permitted. Modifications to the machine by anyone other than AmeriWater
personnel will invalidate the marketing clearance for the device.
This Reverse Osmosis System (RO) contains a preservative solution to
prevent microbiological growth and freezing. Discard all product water for
at least two hours of operation before placing the RO in service.
When used as a medical device, Federal law restricts this device to sale by
or on the order of a physician per 21 CFR 801.109(b)(1)!
2.2 CONTROLS
The processes of the MediQA units are controlled automatically. The MediQA is operated via a
touch screen display panel which also displays system performance data. Process water is
constantly monitored for:
Water quality (μS/cm)
Temperature (°F)
Flowrate (gpm)
Pressure (psi)
These parameters can be viewed via the touch screen display. A data logger is provided and the
data logger information can be downloaded via a memory stick to a PC.
2.3 ALARMS AND MAINTENANCE
The MediQA incorporates monitoring devices and will report alarms and warnings via the touch
screen display. These indicate malfunctions or that preventative action is required. This ensures
the unit is maintained and operated correctly. Reference to these alarms and appropriate
actions can be found in Section 7.

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2.4 CAUTION AND WARNING STATEMENTS
These instructions provide information on safe working practices. These should be
adopted to ensure safe and continuing operation of the equipment. The manual should
be read and understood before the equipment is placed into service.
AmeriWater reserves the right to make engineering refinements to the equipment that
may not be described herein. Any questions that cannot be answered specifically by
these instructions should be addressed to AmeriWater or their agents for a response.
AmeriWater will not accept any responsibility for any equipment supplied or the
actions of such equipment or associated system when the customer has made a
modification that is considered by AmeriWater to compromise the integrity of the
original design philosophy.
If the unit’s performance becomes impaired and any remedial work appears to be
outside the scope of this manual, then seek advice from AmeriWater Technical
Support at telephone number 1-800-535-5585. Be prepared to provide the unit’s
serial number.
The unit must not be dismantled unless carried out by AmeriWater personnel or
authorized trained personnel.
Under no circumstances should the unit be connected to the electrical supply with the
front control panel open.
Always refer to the Material Safety Data Sheets before handling any of the
recommended cleaning chemicals.
There is the potential for sensitive equipment/devices located in close proximity to the
MediQA unit to be affected by electromagnetic or other interference generated from
other units. If affected by interference the relevant equipment/device should be
relocated.
The use of mobile phones in close proximity to the MediQA unit should be avoided
where possible.
The ‘Caution’ symbol is used throughout this manual to highlight where particular care
must be taken to ensure the safety of the operator, and the protection provided by the
equipment, is not impaired.

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2.5 GENERAL SAFETY INFORMATION
Explanation of symbols and references
Danger
This symbol refers to any immediate dangers that may threaten
the safety and life of persons.
Failure to observe these notices will have severe consequences
on health and safety, including life-threatening injuries.
Warning
This symbol refers to a possible danger that threatens the safety
and life of persons.
Caution
This symbol refers to a possibly hazardous situation.
Failure to observe these references may result in minor injuries
and/or damage to property.
This symbol points out important information for working with
the system in a proper manner.
This symbol indicate possible hot surface. Touching parts of the
machine showing this label should be avoided.
Failure to observe these references may result in malfunctions
in the system or impact on the environment.
Additional safety requirements
Country-specific requirements standards and regulations must be observed.
Usage in accordance with intended purpose.
The MediQA units are used to purify water for the purpose of feeding medical devices
(dialysis machines). The water produced must not be used for drinking as it may be
harmful to the body or for any other purpose not described in this manual. The units
must only be operated in accordance with this operating manual. The units must not be
operated unless in proper working order. Any malfunctions must be rectified
immediately.
Indoor use only.
Not to be used in an explosive atmosphere.
Refer to environmental conditions Section 3.3.

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Operating staff
Only persons who have read and understand these Operation Instructions should be
permitted to operate the unit. When operating the unit, it is particularly important to
observe the safety information strictly.
Mechanical force
Some parts of the system could be under pressure of up to 300 psi. Always make sure
the pressure has dispersed from the unit before repairs and maintenance tasks are
carried out.
Bringing the system to a stop in the event of an emergency
• Depress the Emergency stop button
• Turn off the electrical supply and isolate.
• Shut off the water supply.
After remedying the fault:
• Open the water supply.
• Turn on the electrical supply.
• Reset to emergency stop button
• Clear on main screen of touch panel
• Restart/operate the unit via the main touch screen panel.
Safety information for maintenance tasks
The operator must take care to ensure that authorized and qualified professionals who
have been sufficiently trained for the task at hand by thoroughly studying the Operating
Instructions perform all maintenance, inspection and assembly tasks. Professionally
trained staff must properly perform these tasks.
The system must be shut down and protected from being placed in operation again
unintentionally before all repair and maintenance tasks have been completed. It is
essential to observe the procedure described in these Operating Instructions for
shutting down the system.
Before beginning tasks on the electrical equipment of the system, a check must confirm
that power has been disconnected from the corresponding section of the system. In
addition, the system must be secured to prevent it from being turned on again
unintentionally. Follow proper Lock Out Tag Out (LOTO) procedures.
Disposing of system parts and operating materials
When they need to be discarded, consumables must be disposed of according to local
requirements.

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Unauthorized conversion and manufacturing replacement parts
Conversion or modification of the system is only permitted with the approval of the
manufacturer. The same applies to making changes in the programming for the control
system. Original replacement parts and accessories authorized by the manufacturer
enhance safety. Use of other parts will void the warranty.
Warranty claims and liability
The buyer has a one year warranty on all equipment and parts, excluding non-durable
components (e.g., filter cartridges, reverse osmosis membranes, filter media,
consumable chemicals, etc.); provided that the system is not subject to abuse, misuse,
alteration, neglect, freezing, accident or negligence; and provided further that the
system is not damaged as the result of any unusual force of nature such as, but not
limited to, flood, hurricane, tornado, or earthquake.
The warranty covers the replacement of equipment and/or parts only. The warranty
does not cover labor charges or travel expenses resulting from the service of
equipment. The manufacturer is excused if failure to perform its warranty obligations is
the result of strikes, government regulation, materials shortages, or other
circumstances beyond its control.
To obtain warranty service, notice must be given to the manufacturer within 30 days of
the discovery of the defect.
There are no warranties on the AmeriWater system beyond those specifically described
above. All implied warranties, including any implied warranty of merchantability or of
fitness for a particular purpose are disclaimed to the extent they might extend beyond
the above periods. The sole obligation of the manufacturer under these warranties is to
replace or repair the component or part which proves to be defective within the
specified time period, and the manufacturer is not liable for consequential or incidental
damages. No dealer, agent, representative, or other person is authorized to extend or
expand the warranties expressly described above.
Some states do not allow limitations on how long an implied warranty lasts or
exclusions or limitations of incidental or consequential damage, so the limitations and
exclusions in the warranty may not apply to you. This warranty gives you specific legal
rights, and you may also have other rights, which vary from state to state.
Manufacturer: AmeriWater Telephone: [phone]
3345 Stop 8 Road Fax: [phone]
Dayton, OH 45414
United States of America

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3. STANDARD FEATURES
3.1 MEDIQA STANDARD FEATURES
• Flow rate, temperature, pressure and water quality monitoring.
• System status alarms.
• Semi - automated chemical cleaning
• Touch screen user interface.
• Heat sanitization feature
3.2 ELECTRICAL SPECIFICATIONS / CONNECTIONS
3.2.1 Mains supply
See specification.
The earth leakage current of this equipment can exceed 3.5mA (<5mA).
Therefore it is essential that the earth connection is made before the supply is
established.
A warning label on the equipment states:
DANGER!
DISCONNECT THE MAINS
SUPPLY BEFORE SERVICE
3.2.2 USB Connection Details
Standard USB port suitable for FAT16 formatted USB drive, 2GB max.

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3.3 ENVIRONMENTAL
Applicable to all product variants
Parameter
Value
Room storage and operating temperature range.
41-104°F (5 to 40°C)
Relative humidity.
30 to 80%
Maximum altitude.
6562 ft
Transport and storage temperature
(limited by RO membranes).
41-104°F (5 to 40°C)
RFI/EMI radiation
The EMC environment must be within the
limits to which the RO has been tested. Care
must be taken not to have sources of
RFI/EMI, which are liable to cause
electromagnetic disturbance of the unit. If
the RO is affected by such disturbance, the
source must be suppressed or moved.
3.4 STANDARDS APPLIED
Applicable to all product variants
Type
Standard
EMC
BS EN 61326:1998/IEC 61326-1 :1997;Class A
Electrical equipment, for measurement, control and laboratory use EMC
requirements.
BSEN 61000-3-2:1995, Incorporating Amendments 1 & 2.
Mains Harmonic Emissions.
BS EN 61000-3-2:1995, Incorporating Amendment 1
Mains Flicker Emissions.
LVD
BS EN 61010-1:2001 , Incorporating Amendment 1
Safety requirements for electrical equipment, for measurement control and
laboratory use.
MDD
BS EN ISO 13485:2003
Medical Devices Quality management System

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3.5 SPECIFICATION DATA
Single Pass MediQA
Dual Pass MediQA
Catalog Number
00MSP2-230
00MSP3-230
00MDP2-230
00MDP4-230
Performance
Permeate flow rate
@ 77°F**
gpm
9.0
12.0
5.5
10.0
Dimensions
Height
Inches
79
79
79
79
Width
Inches
43
43
43
43
Depth
Inches
64
64
64
76
Weights
Working
lbs
1310
1375
1660
2285
Shipping*
lbs
1050
1100
1370
1970
Services-Feed Water
Pressure
30/80 psi
Free Chlorine
Following activated carbon, free chlorine level must be < 0.1 ppm
Temperature
For best performance feed water temperature should be 41°F to 95°F
TDS
Maximum feed water total dissolved solids 1000 ppm
Total Hardness
Softened feed water with a total hardness of < 4 ppm as CaCO3
S.D.I.
Silt density index following final 5 micron filtration should be < 5
Fluoride
< 1.2 ppm for “Hi Recovery Mode”
Services - Power
Supply
V/ph/Hz
All units require 3-phase supply 208/230V,with Neutral, 60 Hz
Max Current Draw
Amps
44
44
44
59
* Un-crated weight.
** Variations in feed water temperature can affect output by up to +3% per degree Fahrenheit.

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3.6 PERFORMANCE PARAMETERS
MediQA Performance Parameters
Single Pass
Dual Pass
Catalog Number
MSP2
MSP3
MDP2
MDP4
Flow Rates
Product Flow Specification (GPM)
9
12
6
10
Product Flow Range (GPM)
7.2-10.8
9.6-14.4
4.8-7.2
8-12
Stage 1 Concentrate Flow (GPM)
Nominal: 5
3.8-9
Nominal: 6.5
5-12
Nominal: 5
3.8-9
Nominal: 6.5
5-12
Stage 2 Concentrate Flow (GPM)
NA
NA
1-3
1-3
Stage 1 Recovery (%)
Nominal: 65
50-70
Nominal: 65
50-70
Nominal: 65
50-70
Nominal: 65
50-70
Stage 2 Recovery (%)
NA
NA
Nominal: 80
75-85
Nominal: 80
75-85
Pressure
Stage 1 Pump Pressure (PSI)
140-180
140-180
140-180
140-180
Stage 2 Pump Pressure (PSI)
NA
NA
140-180
140-180
Feed Water Pressure (PSI)
30-80
30-80
30-80
30-80
Interstage Pressure [Bar]
(PSI)
NA
NA
2-5
(30-70)
2-5
(30-70)
Temperature
Feed Water Temperatures (F)
40-90
40-90
40-90
40-90
Conductivity
Output Conductivity
>94% Incoming
>94% Incoming
>94% Incoming
>94% Incoming
Water
Water
Water
Water
Based on Standard Recovery Mode
Each MediQA should perform within these parameters. Pressures may vary depending on the age and condition of the membrane.
*The ideal Feed water temperature is 77 degrees Fahrenheit. This will be the optimal operation temperature of the system.
The DOW heat disinfection membranes are manufactured with a ±20% tolerance for flow rate. This is factored into the Product Flow Range category.
Output conductivity is based on the quality of the feed water. The output conductivity should be greater than 94% of the incoming feed water.

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4. OPERATIONAL OVERVIEW
The MediQA is available as a single pass or dual pass reverse osmosis (RO) unit to be
used for purification of potable water for renal dialysis applications.
Potable water enters the MediQA through an inlet solenoid valve filling the feed water
tank. A high pressure pump delivers water from the feed water tank through the 1st
stage RO module set (may comprise of one or more modules), with each module
containing a high performance membrane.
The water entering the RO module is split into two flows. The water which passes
through the RO module (membrane) is known as permeate and is purified water. The
rest of the water, rejected by the membrane, passes out of the RO module as a second
flow stream. The rejected water contains an increased level of dissolved salts and is
known as concentrate. A portion of the concentrate will be recovered and directed back
into the tank for re-processing.
In the single pass system, Hi Recovery Mode allows a higher percentage of reject water
to be recovered. The default target recovery percentage is 65%.
In the dual pass system, process water (permeate) from the 1st stage is pressurized by
a second high pressure pump and fed to the second stage RO module set (may
comprise of one or more RO modules).
In the dual pass (two RO stages) MediQA, a portion of the concentrate (reject water)
from the 1st stage RO module set is discharged to drain while the balance is returned
to the tank. Concentrate from the 2nd stage RO module set is returned to the feed
water tank for reprocessing.
Permeate from the 2nd stage RO module set is fed via a manifold to the distribution
loop. Permeate returning from the loop is fed back into the feed tank.
The feed and permeate water flows are monitored at various points in the process to
verify temperature, conductivity, and flow.
This data is displayed on a touch screen panel to give instant feedback of water quality
and process activity.
4.1 MEDIQA BASIC OPERATION
When TIMER or CONTINUOUS is activated by touch buttons on the touch screen display
the MediQA initially performs an AutoFlush followed by an AutoRinse routine, once
completed purified water will be available (supplied through connection pipe work) to
the distribution loop or attached medical device. This feature of the system prevents

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inadvertent supply of poor water quality to the loop or attached device (typically dialysis
machines). System operation can be switched OFF by pressing the OFF button on the
touch screen display. An AutoFlush is performed when the unit is switched off, if it has
been in operation for more than two hours.
Purification of the incoming softened water supply is achieved by employing reverse
osmosis membranes technology.
The MediQA can be set to “POWER ON STANDBY” for occasions when there are long
periods (typically days during shut down periods) without use. In standby mode the
MediQA is factory set to perform 10 minutes of operation in every 2 hours, these values
are adjustable. This enables water to be circulated through the MediQA and distribution
loop, in order to maintain water quality.
The MediQA has two modes of operation, TIMER and CONTINUOUS. If TIMER is
selected an internal time clock activates operation, determined by the timer clock
settings. When not scheduled to operate, the device will turn on every 2 hours for 10
minutes of operation to maintain the quality of the water in the distribution loop. If
CONTINUOUS is selected the MediQA will supply water to the attached distribution loop
/ medical devices on a 24/7 basis.
The single pass MediQA units have the capability to run in HI RECOVERY MODE, which
uses up to 40% less water than STANDARD RECOVERY MODE. HI RECOVERY MODE is
the default setting. See Section 6.4.1 for navigation instructions.
The MediQA also features routines to enable chemical cleaning of its RO membranes
(but not the connected distribution loop).
In addition to the above, the MediQA incorporates process elements to enable heat
disinfection of the reverse osmosis membranes and its pipe work. Heat disinfection can
be activated manually using the RO Heat Disinfection button on the touch screen
display or automatically if timer clock settings are implemented.
Regular cleaning and sanitization of the unit is recommended to maximize the life of the
RO membranes and ensure high performance.
Once CHEMICAL CLEAN has been selected the process is semi-automatic and requires
only the provision of specified cleaning and sanitizing chemical / agents. The touch
screen display will give prompts at appropriate stages of the routine.
Frequency of heat disinfection will depend upon usage and application demands.
Monitoring of the system for bacterial content should be conducted at regular intervals
to determine the optimum frequency for heat disinfection.

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4.2 SEQUENCE OF OPERATIONS
4.2.1 Introduction
There are two modes of operation, Hi Recovery Mode and Standard Recovery
Mode. Hi Recovery Mode is the default and can be toggled to Standard Recovery
Mode on the RO Supply screen (see Section 6.4.1). The MediQA system uses a
series of automated 2 and 3 way stainless steel valves to direct the water flow
through the unit during each of the various stages of operation. These valves are
marked with yellow indicators that represent the openings of the valve. The
yellow markers are used as a visual indicator of the position of the ball valve as it
relates to the flow of the water through the valve. The following pictures
illustrate the valves during operation.
Product to Loop Valve
Loop Return Valve
Concentrate to Drain Valve
Water enters valve
Water exits valve
Concentrate Throttle Valve
Recirculation Throttle Valve

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4.2.2 High Recovery Mode
This mode of operation is designed to limit water usage while still meeting water
quality standards. Hi Recovery Mode uses up to 40% less water than Standard
Recovery Mode. The mode is comprised of Flush, Rinse, and Supply.
FLUSH
Before the MediQA provides water to the loop for dialysis use, the system goes
through a flush. This isolates the water from the loop and dumps all of the water
down the drain for a preset time. The following figures show the valve
positioning during this process. Positioning of the valves is controlled via the PLC.
Figure 1 Figure 2 Figure 3
Concentrate to Drain Valve Loop Return Valve Product to Loop Valve
RINSE
After the flush cycle is completed, the RO will go into a rinse. During rinse the
unit continues to run the pumps at a high pressure. Water is flushed down the
drain similar to the flush of the membranes. The position of the valves during
this process is the same as Figures 1-3.
SUPPLY
After Flush and Rinse cycles are completed, the MediQA will go into Supply.
Supply is when the RO begins providing water to the loop for use with the
Dialysis machines. This is the process the RO will be in for a majority of its
usage. During the supply mode, valve position is critical as product flow rate is
directly dependent on the valves. Water returning from the loop is redirected to
the MediQA tank via the loop return valve shown in Figure 5. The following
figures show the expected position of these valves during normal operation and
are instructed to be fully open via the PLC. This mode is split into two parts to
conserve water, reject to tank and water to drain. During this period of
operation, the reject water will be sent to drain at a target of 65% recovery.
Reject to Tank:
Concentrate and permeate water will recirculate to the feed water break tank
until the permeate quality reaches the HI RECOVERY QUALITY HIGH LIMIT or

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Figure 7
Concentrate to Drain Valve
BREAK TANK TEMPERATURE HIGH LIMIT set-points. When these set-points are
reached the water to drain period will begin and the RO will dump water to
drain. During times of low water usage in the RO distribution loop, the feed
water quality in the break tank will remain close to incoming water quality. See
Section 6.4.1 for more information.
Figure 4 Figure 5 Figure 6
Concentrate to Drain Valve Loop Return Valve Product to Loop Valve
Water to Drain:
Reject water is dumped to the drain until the
permeate quality reaches the HI RECOVERY QUALITY
LOW LIMIT or BREAK TANK TEMPERATURE LOW
LIMIT set-point. Valve position will remain the same
for Loop Return and Product to Loop Valves. The
Concentrate to Drain Valve will rotate as shown in
Figure 7.
4.2.3 Standard Recovery Mode
Standard Recovery Mode is also comprised of Flush, Rinse, and Supply mode.
Flush and Rinse operations remain the same, see Figures 1 through 3. However,
when operating in Standard Recovery Mode, there is no Reject to Tank step of
Supply. There will be more water usage due to less water being recovered during
this period. See Figures 4-6 for valve positioning.
4.2.4 Heatsan Fill Procedure
The MediQA can be called on to provide water to the Heatsan. Be sure that MINT
cable is connected between MediQA and Heatsan for fill procedure to function.

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98-0157 Rev K
Figure 8 Figure 9 Figure 10
Concentrate to Drain Valve Loop Return Valve Product to Loop Valve