AmeriWater MRO3Z Instruction manual

98-0155 Rev. C
MROZ
OPERATION & MAINTENANCE MANUAL
Manufactured With Pride
In The USA
www.ameriwater.com • 800-535-5585
AmeriWater • 3345 Stop 8 Rd. • Dayton, OH 45414

98-0155 Rev. C

98-0155 Rev. C
CAUTIONARY SYMBOLS
Caution, risk of electrical shock!
Attention, risque de choc électrique!
Open by qualified service personnel only!
Ouverture par le personnel qualifié seulement!
Refer to this Operation and Maintenance Manual for instructions and
safety considerations.
Référez-vous au manuel des Opérations et Entretien pour
instructions et mesures de sécurité.
Caution, risk of danger!
Attention, danger potential!
For service by qualified service personnel only!
Entretien par le personnel qualifié seulement!
Replace only with 120Vac, 15amp, time-delay fuse.
Remplacer avec 120Vac, 15 amp, fusible à retardement
seulement.
Earth Ground terminal
Borne de mise à la terre
This product has been tested to the requirements of CAN/CSA-C22.2 No. 61010-1,
second edition, including Amendment 1, or a later version of the same standard
incorporating the same level of testing requirements.
120 15

98-0155 Rev. C
TABLE OF CONTENTS PAGE
1.0 GENERAL INFORMATION............................................................................................1
1.1 INTRODUCTION ............................................................................................................................................................. 1
1.2 RESTRICTION ON USE..................................................................................................................................................... 1
1.3 INDICATIONS FOR USE ................................................................................................................................................... 2
2.0 TECHNICAL INFORMATION ........................................................................................3
2.1 SPECIFICATIONS............................................................................................................................................................. 3
2.2 MROZ OUTPUT WATER QUALITY ................................................................................................................................... 5
2.3 ENVIRONMENTAL/TRANSPORT CONDITIONS EXPECTED .............................................................................................. 6
3.0 COMPONENTS AND SCHEMATICS ............................................................................7
3.1 EXTERNAL FRONT VIEW ................................................................................................................................................. 7
3.2 INTERNAL CABINET, TOP AND SIDE VIEW .................................................................................................................... 10
3.3 INTERNAL CABINET, TOP AND SIDE VIEW CONT. ......................................................................................................... 11
3.4 ELECTRICAL DIAGRAM AND FIELD WIRING ................................................................................................................. 13
3.5 FLOW DIAGRAMS ........................................................................................................................................................ 16
4.0 MROZ STARTUP & OPERATION..............................................................................22
4.1 CAUTION...................................................................................................................................................................... 22
4.2 SAFETY FEATURES........................................................................................................................................................ 25
4.3 INITIAL STARTUP.......................................................................................................................................................... 26
4.4 SYSTEM SHUTDOWN ................................................................................................................................................... 28
5.0 DISINFECTING THE SYSTEM....................................................................................29
5.1 DISINFECTION PROCEDURE ......................................................................................................................................... 29
5.2 A WORD ABOUT HYDROGEN PEROXIDE/PEROXYACETIC ACID .................................................................................... 33
5.3 MEMBRANE FLUSH FEATURE (AUTO FLUSH) ............................................................................................................... 34
6.0 MROZ CONTROLLER.................................................................................................35
6.1 FRONT PANEL CONTROLS AND INDICATORS ............................................................................................................... 35
6.2 CONTROLLER OPERATION ........................................................................................................................................... 36
6.3 CONTROLLER ADJUSTMENTS....................................................................................................................................... 39
6.4 STANDARD SETPOINTS ................................................................................................................................................ 42
6.5 TO DISPLAY OR CHANGE SETPOINTS............................................................................................................................ 44
6.6 CHANGING RESISTORS ON THE RO CONTROL BOARD FOR C2 RANGE ......................................................................... 44
7.0 EXTERNAL WIRE INSTALLATION............................................................................46
8.0 MAINTENANCE..........................................................................................................47
8.1 MAINTAINING THE SYSTEM ......................................................................................................................................... 47
8.2 MEMBRANE MAINTENANCE INSTRUCTIONS............................................................................................................... 47
8.3 PREFILTER REPLACEMENT INSTRUCTIONS................................................................................................................... 50
9.0 TROUBLESHOOTING AND REPAIR.........................................................................51
9.1 TROUBLESHOOTING CHART ........................................................................................................................................ 51
9.2 CONTROLLER TROUBLESHOOTING MATRIX ................................................................................................................ 54
9.3 PUMP REPAIR .............................................................................................................................................................. 57
9.4 INSTALLING A REPLACEMENT PUMP ASSEMBLY ......................................................................................................... 57
9.5 SOLENOID TEST PROCEDURE ....................................................................................................................................... 59
9.6 SOLENOID VALVE REPLACEMENT ................................................................................................................................ 59
10.0 WARRANTY POLICY .................................................................................................60
11.0 SPARE PARTS LISTING............................................................................................61
ROUTINE REPLACEMENT ITEMS (NON-DURABLE COMPONENTS) ..................................................................................... 61
SPARE PARTS ITEMS ........................................................................................................................................................... 62

98-0155 Rev. C

1 98-0155 Rev. C
1.0 GENERAL INFORMATION
1.1 INTRODUCTION
Congratulations on your decision to use the MROZ system! The MROZ is a water treatment
system for use in hemodialysis applications. It is designed to pretreat and purify water
resulting in product water that meets or exceeds ANSI/AAMI requirements for use in making
dialysate for hemodialysis.
The model that you purchased was selected for the volume of water needed and the analysis
of your input water. It 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. This Operation Manual was written for the MRO3Z, MRO4Z,
MRO5Z, MRO6Z, MRO7Z and MRO8Z models.
Your MROZ system was thoroughly tested and in excellent condition when it was shipped to
you. However, because damage during shipment is possible, please unpack and carefully
inspect the MROZ as soon as you receive it. Please notify AmeriWater®if any problems are
encountered.
The initials “PAA” are used occasionally throughout this manual to generically represent the
hydrogen peroxide/peroxyacetic acid solution that is to be used for disinfection. Peracidin®is
an example of this solution. The caution on the front panel of the MROZ that states “Use only
PAA/Use no substitutes” means that any of these products are acceptable. Do not attempt to
use anything other than hydrogen peroxide/peroxyacetic acid disinfecting solution.
Please read the Operations Manual before using the system. Contact AmeriWater
Customer Service with any questions at 1-800-535-5585 Monday through Friday 8:00 a.m. to
5:00 p.m. eastern standard time. For after-hours emergencies call 1-800-535-5585 and follow
the instructions on the recorded message. Our on-call technician will return your call as soon
as possible.
NOTE: This entire Operations Manual should be read before operating or servicing the
system. This Operations Manual should then be kept near the system and used as a
reference and troubleshooting guide.
WARNING: 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.
CAUTION: No person should attempt to operate or service the AmeriWater MROZ
without prior authorization, instruction, and training from AmeriWater
and/or your medical facility director.
1.2 RESTRICTION ON USE
CAUTION: Federal law restricts this device for sale by or on the order of a physician
(medical director) for use as a water treatment device for hemodialysis.

2 98-0155 Rev. C
1.3 INDICATIONS FOR USE
The AmeriWater MROZ Reverse Osmosis System is a water treatment device intended for
use in hemodialysis applications. It is intended to be used as a component in the AmeriWater
Water Purification System (K991519), and is intended to purify potable water for use in
making dialysate for hemodialysis and to meet current AAMI and Federal (U.S.)
standards. The AmeriWater MROZ is intended for use in water rooms in a hospital, clinic, or
dialysis center. 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.
FLOW RATE TABLE
MROZ Model
Storage Tank Flow Rate
(GPD - Gallon Per Day)
Direct Feed Flow Rate
(GPD – Gallon Per Day)
MRO3Z 5513 TO 8,750 GPD 4788 TO 7,600 GPD
MRO4Z 7245 TO 11,500 GPD 6300 TO 10,000 GPD
MRO5Z 7560 TO 12,000 GPD 6577 TO 10,440 GPD
MRO6Z 9374 TO 14,880 GPD 8155 TO 12,945 GPD
MRO7Z 10773 TO 17,100 GPD 9373 TO 14,877 GPD
MRO8Z 12312 TO 19,543 GPD 10711 TO 17,002 GPD
Each model is available in a 208V, 230V, or 460V variant and includes a divert- to-drain
feature to prevent patient exposure to unsafe product water. Each model includes
temperature compensated online monitors that display conductivity and percent rejection.
The conductivity monitor activates an audible and visual alarm when the product water
conductivity exceeds a preset alarm limit.

3 98-0155 Rev. C
2.0 TECHNICAL INFORMATION
2.1 SPECIFICATIONS
Ideal, minimum, and maximum
incoming water temperature
Min = 41° F
(5° C) Max = 90° F (33° C)
Ideal Temperature = 77° F (25° C)
Prefilter gauge pressure (when the
MROZ is running)
Minimum
Maximum 20 PSI 90 PSI (Pounds per Square Inch)
MRO3Z Pump pressure
–
Minimum
Maximum
100 PSI
140
PSI
MRO4Z Pump pressure
–
Minimum
Maximum
100 PSI
160
PSI
MRO5Z Pump pressure
–
Minimum
Maximum
100 PSI
160
PSI
MRO6Z Pump pressure
–
Minimum
Maximum
100 PSI
160
PSI
MRO7Z Pump pressure
–
Minimum
Maximum
100 PSI
180
PSI
MRO8Z Pump pressure
–
Minimum
Maximum
100 PSI
200 PSI
Water pressure to dialysis machine
Controlled by Loop return relief valve.
Maximum output of product water
@ 77°F (25°C), TDS<1000 ppm of
NaCl, & pump pressure of 200 psi.
These flows are based on
storage tank flows and direct
feed flows are 87% of the
storage tank setup flows.
MRO3Z
–
5513
TO
8,750 GPD
(20,869 TO 33,122 LPD)
MRO4Z – 7245 TO 11,500 GPD
(27,425 TO 43,532 LPD)
MRO5Z – 7560 TO 12,000 GPD
(28,618 TO 45,425 LPD)
MRO6Z – 9374 TO 14,880 GPD
(35,484 TO 56,327 LPD)
MRO7Z – 10773 TO 17,100 GPD
(40,780 TO 64,730 LPD)
MRO8Z – 12312 TO 19,543 GPD
(46,606 TO 73,978 LPD)
(Gallons Per Day / Liters Per Day)

4 98-0155 Rev. C
Materials that Contact Product Water:
ABS
Acrylic
Carbon
EPDM
Nylon
Polyester
Polyethylene
Polypropylene
PVC
Stainless Steel
TFCM* (Polyimide)
Tygon
*Thin Film Composite Membrane
All of the above listed materials meet FDA and/or NSF standards.
Connections Feed = 1” plain hose Product = 3/4” plain hose
Drain = 1” plain hose
Electrical Requirements
For the controller: 120V/60HZ UL Listed GFI
(Ground Fault Interrupter), capable of 125VAC,
20AMP, 2.5kVA, -35C TO 66C, 60HZ, 4 TO 6mA
leakage.
For the pump: UL Listed, lockable, NEMA 4X rated
3 phase fused disconnect capable of 240VAC,
30AMP, 31.18kVA (For the 208/230V models) and
600VAC, 30AMP, 31.18kVA (For the 460V models)
Pump Electrical Ratings
Pump Model Voltage
Frequency
(Hz)
Phase Ø
Max Amp
Draw
3Z402 Pump
208
60
3
5.5
3Z403 Pump
230
60
3
4.7
3Z404 Pump
460
60
3
2.5
4Z
-
5Z402 Pump
208
60
3
8.8
4Z
-
5Z403 Pump
230
60
3
7.6
4Z
-
5Z404 Pump
460
60
3
3.8
6Z402 Pump
208
60
3
12.0
6Z403 Pump
230
60
3
10.1
6Z404 Pump
460
60
3
5.3
7Z
-
8Z402 Pump
208
60
3
12.0
7Z
-
8Z403 Pump
230
60
3
10.1
7Z
-
8Z404 Pump
460
60
3
5.3
Dimensions Packaged
Dimensions not Packaged 80” H x 32" W x 58" D 76”H x 30”W x 55”D
Shipping Weight / Operation Weight
MRO3Z 360 - 410 lbs. / 285 lbs.
MRO4Z 390 - 440 lbs. / 320 lbs.
MRO5Z 420 - 470 lbs. / 355 lbs.
MRO6Z 450 - 500 lbs. / 390 lbs.
MRO7Z 470 - 530 lbs. / 410 lbs.
MRO8Z 500 - 560 lbs. / 440 lbs.

5 98-0155 Rev. C
2.2 MROZ OUTPUT WATER QUALITY
The physician in charge of dialysis has the ultimate responsibility for selecting the maximum
allowable levels of chemical contaminants in the water, and, also, is responsible for
monitoring the water. The AmeriWater MROZ System is designed to produce water that
meets or exceeds ANSI/AAMI requirements.
Polyamide Thin Film Composite Membrane
PT401 Antiscalant/Scale Inhibitor
Contaminants
Chemical Feed System
Membrane Scale Control
Not to exceed 40 ppm
Contaminants
Percentage Removal
Calcium
Magnesium
Sodium
Potassium
Fluoride
Nitrate (NO3)
Sulfate
Copper
Barium
Zinc
Aluminum
Arsenic
Lead
Silver
Cadmium
Chromium
Selenium
Mercury
Antimony
Beryllium
Thallium
99.5
99.5
98.0
97.0
87.0 - 93.0
60.0 - 75.0
99.5
98.0 - 99.0
96.0 - 98.0
98.0 - 99.0
98.0 - 99.0
94.0 - 96.0
96.0 - 98.0
93.0 - 96.0
96.0 - 98.0
96.0 - 98.0
94.0 - 96.0
96.0 - 98.0
96.0 - 98.0
96.0 - 98.0
96.0 - 98.0

6 98-0155 Rev. C
2.3 ENVIRONMENTAL/TRANSPORT CONDITIONS EXPECTED
ENVIRONMENTAL CONDITIONS ANTICIPATED
This device is intended to be used under the following conditions:
Indoor use;
Altitude up to 2000 m; 6562 feet
Temperature between 5°C and 40°C; 41°F and 104°F
Maximum relative humidity 80% for temperatures up to 31°C (87.8°F) decreasing linearly to
50% relative humidity at 40°C (104°F)
MAINS supply voltage fluctuations up to + 10% of the nominal voltage;
Transient overvoltages present on MAINS supply = CATEGORY II;
Applicable RATED POLLUTION degree 2.
TRANSPORT CONDITIONS ANTICIPATED
Altitude up to 2000 m; 6562 feet
Temperature between 5°C and 40°C; 41°F and 104°F
Maximum relative humidity 80% for temperatures up to 31°C (87.8°F) decreasing linearly to
50% relative humidity at 40°C (104°F)

7 98-0155 Rev. C
3.0 COMPONENTS AND SCHEMATICS
3.1 EXTERNAL FRONT VIEW
MRO3Z THRU MRO6Z CONFIGURATION SHOWN, MRO7Z & MRO8Z MODELS
HAVE AN EXTERNALLY MOUNTED PRE-FILTER CARTRIDGE ASSEMBLY.
Figure 3.1

8 98-0155 Rev. C
MRO7Z and MRO8Z CONFIGURATION SHOWN BELOW
Figure 3.2

9 98-0155 Rev. C
IDENTIFICATION OF COMPONENTS (EXTERNAL FRONT VIEW)
1. PRODUCT GPM: Rotameter that measures the flow of the Product Water for Dialysis
in gallons per minute (GPM).
2. SIDE ENTRY HOOD: External wire installation for float level switches, pretreat lockout
and RO alarm relay connectors; (See Section 7).
3. REJECT GPM WITH VALVE: Rotameter with valve to control the flow of the Reject
water to drain, in gallons per minute (GPM).
4. RECIRCULATING GPM: Rotameter with valve to control the flow of water being
recirculated back before the pump, in gallons per minute (GPM).
5. CHLORAMINE SAMPLE TEST PORT: Valve for taking sample of feed water before
the RO.
6. PREFILTER INLET PSI: Gauge that measures the pressure (in pounds per square
inch) of the prefilter inlet.
7. PREFILTER OUTLET PSI: Gauge that measures the pressure (in pounds per square
Inch) of the prefilter outlet.
8. PRODUCT WATER FOR DIALYSIS: Connection carrying Product Water for Dialysis.
9. REJECT WATER TO DRAIN: Connection carrying Reject to the drain.
10. INCOMING TAP WATER: Hose carrying Incoming Tap Water that is to be treated by
the RO.
11. PAA JUG: Plastic jug to mix hydrogen peroxide/peroxyacetic acid (PAA) disinfecting
solution and water for sanitizing the system; pre-marked with a red Fill Line to indicate
how much water to add.
12. REJECT PSI: Gauge that measures the pressure (in pounds per square inch) of the
water coming from reject side of the membranes.
13. PUMP PSI: Gauge that measures the pressure (in pounds per square inch) of the
water coming from the pump feeding the membranes.
14. PRODUCT WATER TEST PORT: Valve for taking sample of Product Water.
15. CONTROLLER: Control mechanism for the RO. See Section 6.

10 98-0155 Rev. C
3.2 INTERNAL CABINET, TOP AND SIDE VIEW
Figure 3.3

11 98-0155 Rev. C
3.3 INTERNAL CABINET, TOP AND SIDE VIEW CONT.
Figure 3.4

12 98-0155 Rev. C
IDENTIFICATION OF COMPONENTS (INTERNAL CABINET AND SIDE VIEW)
16. MOTOR CONTACTOR/OVERLOAD RELAY: Starts and stops the pump motor and
protects the motor from overload.
17. CLEAN IN PLACE SWITCH (ALARM FAULT OVERRIDE): When the Clean in Place
(CIP) switch is placed to the ON position, all MROZ fail-safe modes are disabled for
low-pressure membrane cleaning with the optional AmeriWater Clean In Place system
(P/N 00CIP2). The controller will display a warning that the CIP mode is active.
18. MEMBRANE: Tape wrapped, spiral-wound, thin film composite membrane for reverse
osmosis.
19. PUMP: Provides the driving pressure for the reverse osmosis system.
20. PRODUCT HEADER ASSY: This header directs all product water from the
membranes to the flow meter.
21. INCOMING CONDUCTIVITY SENSOR: Cell that reads the quality of the feed water.
22. PRODUCT TO DRAIN SOLENOID: Opens when water quality is above set point.
23. PRODUCT TO USE SOLENOID: Closes when water quality is above set point.
24. DISINFECT SOLENOID: Opens to allow the hydrogen peroxide/
Peroxyacetic acid mixture to draw into the system to soak for the sanitize cycle.
25. FEED SOLENOID: Opens when the MROZ system is on to allow water to feed
through the system, closes when the system is OFF.
26. DISINFECT EJECTOR: Causes suction to draw solution from PAA jug when the
Disinfect Solenoid is opened.
27. LOW PRESSURE SWITCH: Switch to protect the pump in the event that the feed
pressure drops below 5 PSI.
28. PRODUCT CONDUCTIVITY SENSOR: Cell that reads the quality of the product
water.
29. RELIEF VALVE: Relieves product water to the drain in the event of excess back
pressure on the product line.

13 98-0155 Rev. C
3.4 ELECTRICAL DIAGRAM AND FIELD WIRING
Figure
3.5

14 98-0155 Rev. C
Fig
Figure 3.6

15 98-0155 Rev. C
Figure 3.7