Maytag MWF4200AWS System information

Service
This manual is to be used by qualified appliance
technicians only. Maytag does not assume any
responsibility for property damage or personal
injury for improper service procedures done by
an unqualified person.
This Base Manual covers general information
Refer to individual Technical Sheet
for information on specific models
This manual includes, but is
not limited to the following:
Whole House
Filtration
System
Maytag
MWF4100
MWF4200
MWF4300
16022684
October 2003
TABLE OF CONTENTS
1
LEGAL ..........................................................................................................................................................1-1
1.1
1.2
MAYTAG WHOLE HOME WATER FILTRATION SYSTEM WARRANTY .......................................... 1-1
LEGAL DISCLAIMER ................................................................................................................................... 1-3
2
SAFETY........................................................................................................................................................2-1
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.7.1
S AFETY INSTRUCTIONS .............................................................................................................................. 2-1
OPERATIONAL SAFETY .............................................................................................................................. 2-1
S ERVICE AND MAINTENANCE S AFETY ................................................................................................... 2-2
WINTER S TORAGE...................................................................................................................................... 2-2
OTHER S AFETY R ECOMMENDATIONS .................................................................................................... 2-2
EMERGENCY BYPASS SAFETY (IF INSTALLED ) ..................................................................................... 2-3
MATERIAL S AFETY DATA S HEETS (MSDS).......................................................................................... 2-5
MAYTAG MC1 Cleaning Solution (Citric Acid)...................................................................................2-5
3
INTRODUCTION TO DRINKING WATER ....................................................................................3-1
3.1
3.2
3.3
3.3.1
3.3.2
3.3.3
3.3.4
3.4
3.4.1
3.4.2
3.4.3
3.4.4
3.4.5
3.5
3.5.1
3.5.2
3.5.3
3.5.4
3.5.5
3.5.6
3.5.7
3.5.8
PURPOSE OF THE MAYTAG WHOLE HOME WATER FILTRATION SYSTEM ................................ 3-1
WATER CYCLE AND ITS EFFECT ON DRINKING WATER .................................................................... 3-1
DRINKING WATER SOURCES .................................................................................................................... 3-2
Municipal Water ...........................................................................................................................................3-2
Cistern Water.................................................................................................................................................3-2
Well Water.....................................................................................................................................................3-3
Surface (lake and river) Water....................................................................................................................3-3
COMMON DRINKING WATER QUALITY CONCERNS ............................................................................ 3-4
Municipal Water Quality Concerns – MAYTAG Solutions.................................................................3-4
Cistern Water Quality Concerns - MAYTAG Solutions .......................................................................3-5
Well Water Quality Concerns - MAYTAG Solutions............................................................................3-5
Surface Water Quality Concerns - MAYTAG Solutions.......................................................................3-7
MAYTAG Model Description And Raw Water Quality Applications...............................................3-7
WATER TREATMENT TECHNOLOGIES - COMPARISONS ..................................................................... 3-8
Carafe (Pitcher) Style Water Treatment Devices ....................................................................................3-8
Point Of Use (POU) Faucet Mount Filter.................................................................................................3-9
Point of Use (POU) Reverse Osmosis System (Economy Version)....................................................3-9
Point Of Entry (POE) Reverse Osmosis System...................................................................................3-10
Point Of Entry (POE) Ultraviolet Sterilization......................................................................................3-10
Point of Entry (POE) Ozone .....................................................................................................................3-11
Point Of Entry (POE) Chlorine Dosing Systems ..................................................................................3-11
Point Of Entry (POE) Sand Filtration .....................................................................................................3-12
4
MAYTAG WHOLE HOME WATER FILTRATION SYSTEM.................................................4-1
4.1
4.2
4.2.1
4.2.2
4.2.3
4.3
4.3.1
4.3.2
4.3.3
4.3.4
4.3.5
4.3.6
4.3.7
4.4
GENERAL S YSTEM D ESCRIPTION............................................................................................................ 4-1
HOLLOW FIBRE WATER FILTRATION MEMBRANE............................................................................. 4-2
Filtration Spectrum.......................................................................................................................................4-2
MAYTAG Whole Home Water Filtration System Advantages ...........................................................4-3
Why Membrane Technology is the Solution to Water Problems .........................................................4-3
MAYTAG WHOLE HOME WATER FILTRATION SYSTEM OVERVIEW ........................................... 4-3
Air Vent..........................................................................................................................................................4-3
Cap...................................................................................................................................................................4-3
Prefilter Housing...........................................................................................................................................4-4
System Housing ............................................................................................................................................4-4
Backpulse Tank.............................................................................................................................................4-4
Lock Ring.......................................................................................................................................................4-4
Stand................................................................................................................................................................4-4
MAYTAG WHOLE HOME WATER FILTRATION SYSTEM OPERATION.......................................... 4-5
i
4.4.1
4.4.2
4.4.3
4.5
4.5.1
4.5.2
4.6
4.6.1
4.6.2
4.7
4.8
MAYTAG Whole Home Water Filtration Cycle ....................................................................................4-5
Automatic Front / Backflush Cleaning Cycle (All Models)..................................................................4-6
Automatic Drain Cleaning Cycle (MWF 4300 AWS only) ..................................................................4-7
MAYTAG C ERTIFICATION AND TESTING S UMMARY........................................................................ 4-8
NSF Certifications........................................................................................................................................4-8
Independent Laboratory Testing Results – Biovir Laboratories.........................................................4-10
MAYTAG WHOLE HOME WATER FILTRATION OPTIONS AND CONTROLLERS........................4-10
MAYTAG Whole Home Water Filtration Options ..............................................................................4-10
MAYTAG Controllers ...............................................................................................................................4-14
MAYTAG PRODUCT MATRIX ...............................................................................................................4-18
PRODUCT S PECIFICATIONS .....................................................................................................................4-18
5
MAYTAG INSTALLATION INSTRUCTIONS ...............................................................................5-1
5.1
5.2
5.2.1
5.2.2
5.2.3
5.2.4
5.2.5
5.3
5.3.1
5.4
5.4.1
5.4.2
5.4.3
5.4.4
5.4.5
5.4.6
5.4.7
5.4.8
5.5
5.5.1
5.5.2
5.5.3
5.5.4
5.5.5
5.5.6
5.5.7
MAYTAG S YSTEM INSTALLATION LOCATION WITH OTHER WATER D EVICES ......................... 5-1
TYPICAL HOUSEHOLD INSTALLATIONS - OVERVIEW ......................................................................... 5-1
Municipal and Well/Cistern Systems – MWF 4100 AWS and MWF 4200 AWS............................5-2
Surface Water Systems –MWF 4300 AWS .............................................................................................5-3
Pump/Pressure Tank Systems .....................................................................................................................5-4
System Drain .................................................................................................................................................5-5
Municipal, Cistern and Well Sources........................................................................................................5-6
INSTALLATION REQUIREMENTS .............................................................................................................. 5-7
Drinking Water Tool Kit Disinfection ......................................................................................................5-8
INSTALLATION............................................................................................................................................. 5-9
Pre-Installation Inspection...........................................................................................................................5-9
Inside the System Box................................................................................................................................5-10
Removal from Box.....................................................................................................................................5-11
Pressurizing Backpulse Tank....................................................................................................................5-12
Positioning and Pipe Assembly ................................................................................................................5-13
External Prefilter Assembly (MWF 4300 AWS) ..................................................................................5-19
MWF 4100 AWS, MWF 4200 AWS Controller (Base Controller)...................................................5-20
MWF 4300 AWS Controller (Advanced Controller) ...........................................................................5-25
COMMISSIONING .......................................................................................................................................5-30
Check for Pressure......................................................................................................................................5-30
Remove Cap and Internal Prefilter Bag ..................................................................................................5-31
Filling and Flushing the System for 15 minutes (after the External Prefilter Assembly Installation
if included)...................................................................................................................................................5-32
Integrity Test................................................................................................................................................5-33
Sanitize System...........................................................................................................................................5-37
Trans Membrane Pressure (TMP) Test...................................................................................................5-38
Cleaning the Stainless Steel......................................................................................................................5-41
6
MAINTENANCE........................................................................................................................................6-1
6.1
6.2
6.2.1
6.3
6.3.1
6.3.2
6.4
6.4.1
6.4.2
6.4.3
6.5
MAINTENANCE SCHEDULE........................................................................................................................ 6-1
WINTERIZATION PROCEDURE.................................................................................................................. 6-3
Spring Start -up after Winterization............................................................................................................6-7
MAYTAG R EPLACEMENT PROCEDURES ...........................................................................................6-10
Replacement Parts ......................................................................................................................................6-10
Replacement Procedures............................................................................................................................6-11
MAINTENANCE CLEANING AND S ANITIZING PROCEDURES .............................................................6-16
Integrity Test................................................................................................................................................6-17
Sanitizing Procedure ..................................................................................................................................6-18
Cleaning Solution Procedures...................................................................................................................6-23
MAINTENANCE S ERVICE TAG ................................................................................................................6-26
7
FREQUENTLY ASKED QUESTIONS ...............................................................................................7-1
7.1
WHAT DOES THE MAYTAG WHOLE HOME WATER FILTRATION S YSTEM DO ? ........................ 7-1
ii
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
7.10
7.11
7.12
7.13
7.14
7.15
7.16
7.17
7.18
7.19
7.20
7.21
7.22
WHERE IS THE MAYTAG WHOLE HOME WATER FILTRATION S YSTEM INSTALLED ? ............. 7-1
DOES THE MAYTAG WHOLE HOME WATER FILTRATION SYSTEM REQUIRE ELECTRICITY ? 7-1
DOES THE MAYTAG WHOLE HOME WATER FILTRATION SYSTEM AFFECT THE WATER
PRESSURE?.................................................................................................................................................... 7-1
WHAT CAN BE DONE TO INCREASE MY WATER PRESSURE? ............................................................... 7-2
HOW OFTEN DOES THE MAYTAG WHOLE HOME WATER FILTRATION S YSTEM NEED TO BE
REPLACED ?................................................................................................................................................... 7-2
HOW LONG DOES THE MAYTAG WHOLE HOME WATER FILTRATION S YSTEM LAST? ........... 7-2
WHAT DO I NEED TO DO IF I GO AWAY FOR AN EXTENDED PERIOD OF TIME? ............................... 7-2
HOW DO I BYPASS THE MAYTAG WHOLE HOME WATER FILTRATION S YSTEM? .................... 7-2
WHAT HAPPENS IF THE POWER GOES OUT? .......................................................................................... 7-3
HOW LONG DOES THE AUTOMATIC CLEANING CYCLE TAKE?........................................................... 7-3
HOW MUCH WATER IS USED FOR FLUSHING ?........................................................................................ 7-3
HOW DO I SET A NEW TIME FOR THE DAILY BACKWASH AND CLEANING?..................................... 7-3
IS THERE A REPLACEABLE PREFILTER NEEDED ? ................................................................................. 7-3
WHAT ARE THE MAINTENANCE REQUIREMENTS ? ............................................................................... 7-3
HOW LONG DOES THE CARBON PREFILTER LAST? ............................................................................. 7-3
CAN I WATER MY LAWN WITH THE MAYTAG WHOLE HOME WATER FILTRATION SYSTEM’S
FILTERED WATER ? ...................................................................................................................................... 7-3
CAN IT BE SHUT DOWN IN WINTER ? ........................................................................................................ 7-3
WHAT HAPPENS IF THERE IS A BOIL WATER ALERT IN MY AREA ? ................................................... 7-3
IF MY S YSTEM CAME WITH A S TAINLESS S TEEL PREFILTER , CAN I BUY A CARBON PREFILTER ?
......................................................................................................................................................................... 7-4
MY WATER IS FROM THE LAKE AND IT HAS A FUNNY SMELL, CAN SOMETHING BE DONE?......... 7-4
MY LAKE WATER IS QUITE DIRTY AND THE EXTERNAL PREFILTER CARTRIDGE REQUIRES
REPLACEMENT QUITE OFTEN. CAN I INCREASE THE TIME BETWEEN REPLACEMENTS OF THE
EXTERNAL PREFILTER CARTRIDGE? ..................................................................................................... 7-4
8
TROUBLESHOOTING............................................................................................................................8-1
9
SHIPPING AND STORAGE...................................................................................................................9-1
9.1
9.2
9.3
9.4
9.5
9.6
9.7
9.8
9.9
DIMENSIONS AND WEIGHTS (SHIPPING DETAILS ) – METRIC AND IMPERIAL UNITS ................... 9-1
MAYTAG S YSTEM .................................................................................................................................... 9-2
MAYTAG BACKPULSE TANK ................................................................................................................. 9-2
MAYTAG S YSTEM BASE.......................................................................................................................... 9-3
MAYTAG PIPE ASSEMBLY KIT.............................................................................................................. 9-3
CARBON PREFILTER ................................................................................................................................... 9-4
S TAINLESS S TEEL PREFILTER .................................................................................................................. 9-4
EXTERNAL PREFILTER INSTALLATION KIT .......................................................................................... 9-5
EXTERNAL PREFILTER............................................................................................................................... 9-5
10
SERVICE KIT INFORMATION AND SYSTEM DRAWINGS ............................................... 10-1
10.1
10.2
10.3
10.4
PARTS ASSEMBLY DRAWING ..................................................................................................................10-1
S YSTEM PIPE ASSEMBLY DRAWINGS ...................................................................................................10-3
S YSTEM BASE CONTROLLER DRAWING ..............................................................................................10-4
S YSTEM ADVANCED CONTROLLER DRAWING ...................................................................................10-6
11
INTERNET RESOURCES AND MANUFACTURER DETAILS ............................................ 11-1
11.1
11.1.1
11.1.2
INTERNET R ESOURCES ............................................................................................................................11-1
System Information and Updates........................................................................................................11-1
Procedural Information and Updates..................................................................................................11-1
iii
1 Legal
1.1
MAYTAG Whole Home Water Filtration System Warranty
You have just purchased one of the leading whole home water treatment systems available. As an
expression of our confidence in the MAYTAG Whole Home Water Filtration System, your drinking
water system is warranted to the original end user against defects in material and workmanship
when:
•
•
It has been installed in accordance with MAYTAG specifications by a MAYTAG Services
Qualified Service Installer.
Annual maintenance has been performed by a MAYTAG Services Qualified Service
Technician. Proof of purchase (invoice) is required.
For a period of one year after installation:
All parts and labour on the complete system excluding consumables (e.g. Prefilters, cleaning
solutions, batteries etc.) and labour required for the operation and maintenance of the MAYTAG
WHOLE HOME WATER FILTRATION SYSTEM as specified in the owners manual.
For a period of two years after installation:
All parts used in the original installation of the MAYTAG WHOLE HOME WATER FILTRATION
SYSTEM, are covered by warranty excluding consumables ( e.g. Prefilters, cleaning solutions,
batteries, etc) required for the operation and maintenance of the MAYTAG WHOLE HOME
WATER FILTRATION SYSTEM. Labour to install warranted parts and trip charges including
mileage are the responsibility of the homeowner.
For a period of 5 years from the date of original installation:
MAYTAG will replace the original MAYTAG WHOLE HOME WATER FILTRATION SYSTEM
Membrane Module when a MAYTAG Services Qualified Service Technician finds a membrane
integrity breach, as defined by an integrity check, within the warranty period. MAYTAG reserves
the right to examine membrane modules deemed by the MAYTAG Services Qualified Service
Technician to have a membrane integrity beach, and provide the final opinion on whether the
membrane module is defective. If the part is found to be defective, MAYTAG will pro rate the cost
of a membrane module as follows:
MAYTAG WHOLE HOME WATER
FILTRATION SYSTEM Warranty Schedule
Pro-rated cost to the homeowner as a %
of Suggested List
Up to 24 months
25-36 months
37-48 months
49-60 months
0%
40%
60%
80%
Labour to install warranted parts and trip charges including mileage are the responsibility of the
homeowner.
This warranty does not apply:
to damage caused by accident, fire, flood, freezing, Acts of God, misuse, misapplication, neglect,
alteration, installation or operation contrary to our printed instructions, or by the use of
accessories or components which do not meet MAYTAG specifications.
to the cost of installation or defects caused by improper storage or handling prior to installing the
equipment.
to any work done by anyone other than a MAYTAG Services Qualified Service Technician.
1-1
to work done under normal maintenance, calibration or regular adjustments as specified in
operating and maintenance instructions of this manual and or labour involved in moving
adjacent objects to gain access to the MAYTAG WHOLE HOME WATER FILTRATION
SYSTEM .
to any system which has been damaged or defaced.
to systems that have been subject to improper, abnormal or insufficient care or cleaning, or to
modification, tampering, alteration, improper service, repair, assembly or disassembly by
anyone other than a MAYTAG Services Qualified Service Technician.
to damage or defects resulting from exposure to excessive heat or cold (including extremely hot or
cold water), or use on improper electrical current or voltage. The System is not for use with hot
water
to systems with which non - MAYTAG consumable items have been used
to systems that have been operated without the specified prefilter
to systems that have been operated without the necessary sediment prefilter on surface waters
to systems that have been subjected to freezing temperatures which have not been properly
winterized as specified in the owners manual
to systems that have been left drained of water or without proper preservation fluids
to membrane fouling
if this filtration device is used for commercial and/or rental purposes. This water filtration device is
designed for normal household use. Filter replacement due to fouling may vary with the quality
and quantity of water.
This limited warranty is provided only to the original consumer purchaser or gift recipient of the
MAYTAG WHOLE HOME WATER FILTRATION SYSTEM resident in Canada or the United States
and may be enforced only by such person. Any repair or replacement to the System under this
warranty shall not extend the warranty period. All parts and products removed from the System
under this warranty become the property of MAYTAG. The owner is responsible for any repairs or
replacements that are not covered by this warranty.
MAYTAG reserves the right to make changes in design or add any improvements on any product.
The right is always reserved to modify equipment because of factors beyond our control and
government regulations. Changes to update equipment do not constitute a warranty change.
Charges involved as a result of these product changes do not include freight or foreign, excise
municipal or other sales tax. All such freight and taxes are the responsibility of the consumer.
The foregoing expressed warranties are in substitution for and exclude all other warranties of any
kind whether arising under statute, and tort, or by implication of law or otherwise including, to the
full extent as may be allowed by law, liability for any other representations respecting the MAYTAG
WHOLE HOME WATER FILTRATION SYSTEM, statutory warranties or implied warranties or
conditions as to its merchantability or fitness. No agent, employer, representative of MAYTAG or
MAYTAG Qualified Dealer, nor any other person is authorized to modify this warranty in any
respect.
ALL IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE, ARE LIMITED IN
DURATION TO THE PERIOD SPECIFIED ABOVE FOR THE PARTS DESCRIBED IN THIS
LIMITED WARRANTY. As a manufacturer, we do not know the characteristics of your water
supply. The quality of water supplies may vary seasonally or over a period of time. Your water
usage may vary as well. Water characteristics can also change if your drinking water system is
moved to a new location. For these reasons, we assume no liability for the determination of the
proper equipment necessary to meet your requirements, and we do not authorize others to
assume such obligations for us. MAYTAG’s OBLIGATIONS UNDER THIS WARRANTY ARE
LIMITED TO THE REPAIR OR REPLACEMENT OF THE FAILED PARTS OF THIS WHOLE
HOME WATER FILTRATION SYSTEM, AND WE ASSUME NO LIABILITY WHATSOEVER FOR
DIRECT, INCIDENTAL, CONSEQUENTIAL, SPECIAL, GENERAL OR OTHER DAMAGES.
1-2
The above provisions do not preclude the operation of any applicable provincial or state statute or
regulation, which in certain circumstances may not allow some of the limitations or exclusions
described in these warranty coverage’s.
The MAYTAG Whole Home Water Filtration System must be;
• kept wet at all times after installation.
• winterized prior to temperatures falling below 0°C (32 F).
• tested annually using the integrity test procedure.
• operated with a prefilter.
Failure to do so may cause the System to dry and/or become damaged, which may lead to personal injury,
and/or physical damage and will void any warranty.
NOTE: The product specifications for the MAYTAG Whole Home Water Filtration System can be
found in section 4.8.
1.2
Legal Disclaimer
This manual attempts to outline some of the basic principles of household water collection, treatment and
discharge and some of the features of the MAYTAG Whole Home Water Filtration System (the
“System”). It is not intended to be a definitive dissertation on the principles set out above, nor is it intended
to be relied upon by anyone but MAYTAG Customer Care (“Consultants”) and MAYTAG Services
Qualified Service Technicians (“Technicians”). Any other reliance is expressly excluded herein. Further,
insofar as Consultants and Technicians are concerned, this document must be utilized in connection with
the authorized training procedures created and to be created by MAYTAG or ZENON Environmental
Inc. It should be remembered that homeowners will also be provided with an owner’s manual, which will
attempt to provide a more general overview of the aforementioned principles and features of the System.
The MAYTAG Whole Home Water Filtration System must be installed by a MAYTAG Services
Qualified Service Technician and properly maintained in accordance with the Operations and the Owners
Manual. Failure to properly maintain the System will compromise performance or and/or result in the
failure to control water quality.
See tables for Certifications and Laboratory test information.
The MAYTAG Whole Home Water Filtration System is not intended for the treatment of water, which has
an obvious contamination source (such as sewage or wastewater). Biofilm and pathogens in home piping
systems could shed into water filtered through our System. Exposure to microorganisms may also occur
during daily activities.
To reduce the risk of severe injury, illness, death and/or property damage, read and follow all instructions.
Use only MAYTAG authorized parts where required to repair and service the MAYTAG Whole Home
Water Filtration System.
1-3
All MAYTAG Whole Home Water Filtration Products must be installed in accordance with all local
building and plumbing codes.
The MAYTAG Whole Home Water Filtration System must be protected against freezing and < 0°C (32
F) temperatures. Failure to do so may cause the MAYTAG Whole Home Water Filtration System to
become damaged, which may lead to personal injury, and/or physical damage.
The MAYTAG Whole Home Water Filtration System must be installed on cold-water distribution
systems only. Failure to do so may cause System damage, which may lead to personal injury, and/or
physical damage.
The MAYTAG Whole Home Water Filtration System must be filled with water at all times after
installation. Failure to do so may cause the System to dry and become damaged, which may lead to
personal injury, and/or physical damage.
Trademarks
The following are registered trademarks:
1-4
2
Safety
2.1
Safety Instructions
Start by reviewing these important safety alert symbols. These safety symbols will alert you to the
possibility of serious injury, death, or property damage.
Danger notices indicate the potential of severe injury, illness, death and/or property damage, for example
electrocution. Read and follow all instructions.
Warnings indicate actions that could cause damage to equipment, water contamination, severe injury,
illness, death, and/or property damage.
The MAYTAG Whole Home Water Filtration System has been designed and tested to offer reliable
service, provided it is installed by a MAYTAG Services Qualified Serv ice Technician and is operated,
maintained, and tested in strict accordance with the safety instructions contained in this manual.
2.2
Operational Safety
•
The MAYTAG Whole Home Water Filtration System is under pressure during use and
precautions must be taken.
•
This device is designed to operate on a 120VAC/15 Amp/ 60Hz line. Do not modify plug on the
power cord. If the plug does not fit the electrical outlet, have a proper outlet installed by a
qualified electrician.
2-1
•
2.3
To avoid System damage: Ensure that a Stainless Steel Prefilter or Carbon Prefilter is in place
during operation of the System. In the absence of an internal Prefilter, abrasive damage to the
System may occur. A damaged System may permit contaminated water to enter the household
distribution system causing illness. Irreversible and premature fouling of the System may also
occur resulting in System replacement at the owner’s expense.
Service and Maintenance Safety
•
To avoid electric shock: Disconnect the AC power from the MAYTAG Whole Home Water
Filtration System before servicing the controller; do not remove the controller cover while System
is in use. Only MAYTAG Services Qualified Service Technicians should attempt to service the
controller.
•
Important: The MAYTAG Whole Home Water Filtration System must be kept in a wetted
condition. Once installed or during service and maintenance activities, do not allow the System to
sit completely drained for extended periods (>12 hours). Failure to do so may damage the System
and cause contaminated water to enter the household for consumption.
The MAYTAG Whole Home Water Filtration System must be kept wet at all times after installation.
Failure to do so may cause the System to dry and become damaged, which may lead to personal injury,
and/or physical damage and will void any warranty.
2.4
•
Winter Storage
The MAYTAG Whole Home Water Filtration System will be damaged if frozen. The System must be
winterized according to the Winterization Procedure 6.2 by a MAYTAG Services Qualified Service
Technician.
The MAYTAG Whole Home Water Filtration System must be;
winterized prior to temperatures falling below 0°C (32°F). Failure to do so may cause the System to dry,
freeze and become damaged, which may lead to personal injury, and/or physical damage and will void
any warranty.
2.5
Other Safety Recommendations
•
•
•
•
Do not plug in the Controller transformer if there is water on the electrical wiring or the power
supply.
Always shut off water flow and release water pressure before cleaning or maintaining the System.
The System is intended for indoor use only. The power supply and controller must not be exposed
to weather elements.
A MAYTAG Services Qualified Service Technician must perform an Integrity Test, Procedure in
section 5.5.4, at least once a year.
2-2
The MAYTAG Whole Home Water Filtration System must be;
• tested annually using the integrity test.
• operated with either a Carbon or Stainless Steel Prefilter.
Failure to do so may cause the System to become damaged, which may lead to personal injury, and/or
physical damage and will void any warranty.
If the MAYTAG Whole Home Water Filtration System is installed in a System that has run untreated
well or surface waters, all household water pipes must be sanitized to ensure water quality.
2.6
Emergency Bypass Safety (if installed)
Metal water piping systems must be electrically grounded and have electrical continuity throughout as
per the local codes. In the absence of a metal bypass valve and piping, electrical bonding between metal
inlet and outlet piping on the MAYTAG Whole Home Water Filtration System must be provided as per
the local codes.
Bypassing the MAYTAG Whole Home Water Filtration System will result in unfiltered water entering
the household distribution system. This water may be biologically unsafe and drinking this water could
result in illness or death. Exercise caution in bypassing the System. Do not drink the water while the
System is in bypass mode.
If the System has been operated in by-pass mode and if the water is being drawn from a well or surface
water source, the household distribution system should be re-disinfected once returned to filtration
mode.
If the System is in by-pass mode, the controller must be unplugged. Failure to do so may cause
System to dry and become damaged, which may lead to personal injury, and/or physical damage and will
void any warranty.
2-3
A bypass system is not required for proper operation of the MAYTAG Whole Home Water Filtration
System, however some local plumbing codes may require a bypass. If the System is to be equipped with a
bypass, this procedure below may be followed to provide water in an emergency or System malfunction.1
Bypass Procedure
1. Close the Inlet and Outlet ball valves (turn handles clockwise). Ball valves are in the closed position
when the handle is positioned perpendicularly to the water pipe.
2. Open Bypass Valve (turn handle counter-clockwise).
3. Unplug the controller.
4. To return to filtered water service;
o close bypass valve (turn handle clockwise)
o open inlet and outlet valves (turn handles counter-clockwise)
o plug in the controller.
1
System malfunction would include a possible water leak or failed integrity test.
2-4
2.7
2.7.1
Material Safety Data Sheets (MSDS)
MAYTAG MC1 Cleaning Solution (Citric Acid)
2-5
2-6
2-7
2-8
2-9
2-10
2-11
3 Introduction to Drinking Water
3.1
Purpose of the MAYTAG Whole Home Water Filtration System
Historically, there have been many documented cases of disease outbreaks caused by harmful
microorganisms, such as bacteria, cysts and certain viruses in drinking water. Individuals who consume
infected water are at risk of serious illness or, in some cases, death. Such outbreaks are still common today,
in part because of inadequate water treatment processes and infrastructure deterioration.
The MAYTAG Whole Home Water Filtration System has been designed to act as an effective barrier to
significantly reduce harmful organisms (as set out here after) that can enter the household water distribution
system. When used properly, the patented MAYTAG Whole Home Water Filtration System will
significantly reduce bacteria, parasites and certain viruses that can enter drinking water distribution
systems.2
When used in conjunction with the MAYTAG Carbon Prefilter, the System will reduce chlorine and other
unpleasant tastes and odours.
3.2
Water Cycle and Its Effect on Drinking Water
The Hydrologic Water Cycle, shown in Figure 3.1, is a continuous process by which water is evaporated
from oceans, moves inland as moist air masses, and produces precipitation. The precipitation that falls on
the land surface is dispersed in several ways. A portion of it is retained in the soil near where it falls and
returns to the atmosphere by evaporation and transpiration (respiration of plant tissue). Another portion of
the precipitation becomes overland flow, which feeds local streams and rivers. Finally, precipitation enters
the soil system as infiltration and may re-enter channels (lakes or oceans) as it travels through the ground
water along the water table. 3
Humans draw water from all of the sources des cribed above for many different uses, including
consumption. When the hydrologic cycle is considered, it becomes very clear that there is high potential
for water to pick up a variety of contaminants along its journey. These contaminants may include harmful
microorganisms such as E.Coli, Cryptospiridium, and Giardia (beaver fever); nuisance metals such as iron
and manganese; heavy metals such as lead; and industrial chemicals such as pesticides and herbicides. It is
very important to monitor water sources regularly for purity. If water is contaminated, some form of
treatment should be provided to eliminate the potentially hazardous components.
2
3
Please refer to NSF and laboratory certifications for performance information.
Hydrology and Floodplain Analysis, 2nd Edition, Philip B. Bedient et.al., Addison-Wesley Publishing, 1992, pp. 1
3-1
Figure 3.1 - The Water Cycle
3.3
Drinking Water Sources
There are a number of water sources available for drinking water and other household uses. In general,
there are two drinking water types: municipal and private. Municipal water can be taken from a number of
locations, including surface waters (lakes and/or rivers), ground wells, and rainwater collection systems.
The water is typically treated to quality standards set by the local government and then delivered to the
community. Private sources can also be taken from surface water (lakes and/or rivers), ground wells, and
rain water collection systems. Water from private sources is not typically treated before consumption and
may still contain contaminants like turbidity, organics, bacteria, viruses, and/or parasites.
3.3.1
Municipal Water
Once the water is taken from the source, it is usually treated with a number of processes that reduce the
turbidity, organic content, and microbiological contamination in the water. At a minimum, municipal
systems provide disinfection residuals by adding for example chlorine or fluoride to maintain the water’s
microbiological safety as it is delivered to the individual residences in the community. More sophisticated
processes can address turbidity, organic matter, mineral contamination such as iron and manganese and
odours such as hydrogen sulphide. Once the water is treated, it is pumped through a piping distribution
system to each individual house.
3.3.2
Cistern Water
Cisterns are simple holding tanks commonly made from concrete and, in more recent times, plastic. They
are used in locations that do not have municipally treated water supplied directly to residences. In these
situations, homeowners can receive water from the municipality on a batch basis from a water hauling
company, collect the water using roof top collection systems, or use a combination of both of these
methods. In the past, water haulers have pumped water from clean, clear sources such as streams or
springs. Because of recent microbiological contamination issues in many locations, water is now more
commonly taken from neighbouring town water treatment facilities. At the household, the water is pumped
into a holding tank that is typically located underground on the homeowner’s property. To supply the
household with water, a pump/pressure tank delivery system is required.
3-2
3.3.3
Well Water
As with cistern systems, households that use well water systems do not have municipally treated water
supplied directly to them. There are a few well types available, depending on the individual homeowner’s
requirements and location of the household. Regardless of the well type, a pump/pressure tank delivery
system is required. Each well type is described in more detail below.
3.3.3.1 Drilled Wells
Drilled wells are usually 152.4 mm (6”) or 203.2mm (8”) in diameter and lined with a solid pipe (well
casing). The well casing usually extends to the bottom of the well into the tapped water source. Drilled
wells are typically the deepest of wells and can reach depths of over 213 m (700 ft). The well depth, well
casing, and well cap all contribute to making this type of well the safest, as contaminated overland flow is
less likely to enter the water supply.
3.3.3.2 Dug Wells
Dug wells are typically shallower than drilled wells and have a wider opening. The shallow depth, lack of
a sealed well casing, and well cap all contribute to a greater risk of contamination by overland water
sources.
3.3.4
Surface (lake and river) Water
There are several methods available for collecting and delivering surface water to a household. In most
cases, the main objective is to eliminate any sediment that might be churned up by tides and/or waves.
Unfortunately, most delivery systems do not make considerations for smaller contaminants like bacteria,
viruses, or parasites that may enter the distribution system.
Surface water systems can use one of two delivery methods, a pump/pressure tank delivery system or a
pump that fills an elevated tank that, in turn, provides water to the household water by gravity.
3.3.4.1 Direct Pump Systems
The most common method for delivering water from surface sources is to pump it directly from the source.
A suction pipe or hose is placed into the lake or river and held above the lake or river bottom, which limits
the amount of sediment that can enter the piping. In these installations, a submersible or centrifugal/jet
pump may be used, depending on the setup.
3.3.4.2 Shore Wells
Located very close to, and sometimes in, bodies of water, this well type is directly influenced by surface
water. Shore wells typically have a casing that is submersed into the ground adjacent to the shoreline. The
main purpose of the casing is to settle out heavy particles that are churned up by daily tides and/or wave
action. Any contaminants that are light and do not settle out are likely to enter the water delivery system.
In these installations, a submersible or centrifugal/jet pump may be used, depending on the setup.
3.3.4.3 Sand Point Wells
This well type is less common, but is used in locations that have sandy beaches. A hollow conical metal
shaft is pushed into sandy ground close to the lake and attached to a water delivery system. Tiny slits in the
metal shaft allow water, but not sand, to enter and be pumped into the delivery system. This type of well
uses the natural filtration provided by the sand to remove larger particles before they reach the sand point.
Because sand point wells are usually installed close to the water source, they are affected by surface water
contaminants like organic matter, bacteria, viruses and parasites. In these installations, a centrifugal/jet
pump is required.
3-3
3.4
Common Drinking Water Quality Concerns
There are many aesthetic and health-related issues associated with drinking water. Factors that affect
drinking water quality may include:
•
•
•
•
•
Geographical location
Water source (raw well, raw surface, municipally treated sources)
Condition of water distribution system (piping, well casing etc.)
Human influences (industrial facilities, gasoline stations, agricultural runoff etc.)
Weather related issues
Water quality issues can vary in intensity over periods of time and from season to season. Since there are
so many factors that affect water quality, it is sometimes difficult to predict.
3.4.1
Municipal Water Quality Concerns – MAYTAG Solutions
3.4.1.1 Microbial Contamination
Drinking water that leaves the municipal treatment plant clean and within government drinking water
quality guidelines may not reach a household in this same clean state. Water pipes and valves may corrode
and develop leaks over time, allowing contaminants to enter the water. In such cases, sanitizing residuals,
like chlorine and chloramines, that normally protect the water from further contamination, may not be
sufficient to maintain water purity because of the degree of contamination. As a result, water quality may
be jeopardized.
Municipal water contamination can also occur when aging and insufficient water treatment facilities
malfunction. In some instances, water being treated may bypass important processes, such as sanitizing
and not be properly treated. Contaminated water that enters the pipes can pose risks to the households
being serviced by the water treatment plant.
The MAYTAG Whole Home Water Filtration System significantly reduces bacteria, viruses, and parasites
from drinking water using ZENON’s patented Water Filtration hollow fibre membranes.4
3.4.1.2 Chlorine (and related tastes and odours)
Chlorine has been used since the early 1800’s to reduce odours generated at wastewater treatment plants.5
Increases in illness from water-borne pathogens prompted authorities to begin using chlorine to disinfect
drinking water supplies. As a result, occurrences of water-borne illnesses dropped dramatically and
diseases like cholera were virtually eliminated. Chlorination is currently the predominant method used to
maintain microbiologically safe water and distribution systems. Despite its benefits, there are some issues
with chlorine. People are becoming increasingly dissatisfied with the distinctive taste and odour of
chlorine. As a result, an increasing number of people are choosing to remove the chlorine from their water
using in-home treatment.
The MAYTAG Whole Home Water Filtration System MWF 4100 AWS has been specially designed with an
Activated Carbon Prefilter and tested to significantly reduce chlorine levels and its related tastes and
6
odours.
3.4.1.3 Non-Chlorine related Tastes and Odours
Odours produced by decaying organic plant matter and/or harmless microorganisms can be unpleasant for
household consumption. These types of odours are typically seen during hot summer months and are
sometimes referred to as “algae-blooms”. Municipal water treatment facilities are often not equipped to
4
Please refer to NSF and laboratory certifications for performance information.
Residential Water Processing, 2nd Edition, Wes McGowan, Water Quality Association, 1997, pp. 223
6
Please refer to NSF and laboratory certifications for performance information.
5
3-4
eliminate these unappealing contaminants, since they vary in intensity and duration from year to year
depending on a number of environmental factors.
When used with the optional Carbon Prefilter, the MAYTAG Whole Home Water Filtration System, MWF
4100 AWS, may provide relief against algae, musty odours and taste produced by the decay of organic
matter during hot summer months.7
3.4.2
Cistern Water Quality Concerns - MAYTAG Solutions
3.4.2.1 Microbial Contamination
Cistern maintenance is very important. Without proper maintenance, contamination can occur and
potentially place the entire water system at risk. Potential methods of contamination include leaking cistern
walls or leaking access caps. Older concrete cisterns are at greater risk than newer plastic cisterns. As
concrete ages and ground forces (freeze/thaw cycles) erode the cistern materials, cracks may occur. These
cracks may allow contaminated ground water from septic beds, agriculture runoff, or other sources to enter
the cistern placing the water at risk. In addition to this risk, small animals have been known to find their
way into cisterns. Once trapped, they perish and can release potentially harmful microorganisms into the
water.
If a cistern is contaminated it should be disinfected immediately. Otherwise, the chances are great that the
contamination will persist for extended periods of time, with attendant health risks.
The MAYTAG Whole Home Water Filtration System significantly reduces bacteria, viruses and parasites
from drinking water using ZENON’s patented Ultrafiltration hollow fibre membranes. 8
3.4.2.2 Odours (decaying organic matter etc.)
Decaying organic matter, including harmless non-pathogenic microorganisms, can produce earthy or musty
odours and tastes in drinking water. These organics typically enter the cistern through rooftop drainage
systems. The method of sealing the cistern can also be a factor in allowing this organic matter to enter the
system. The degree of odour or off-taste is directly related to the quantity of material that is allowed to
enter the cistern. In cases where the water is supplied by the municipality, “algae-bloom” issues may arise,
depending on the water source and treatment processes prior to delivery.
When used with the optional Carbon Prefilter, the MAYTAG Whole Home Water Filtration System MWF
4100 AWS may provide relief against algae, musty odours and taste produced by the decay of organic
matter, primarily during hot summer months.9
3.4.3
Well Water Quality Concerns - MAYTAG Solutions
3.4.3.1 Microbial Contamination
All wells are at risk from microbial contamination, regardless of type. Older drilled well casings can
become cracked or corroded, allowing microbiologically contaminated water to enter. The design of dug
wells makes them vulnerable to contaminated surface water sources. The continuous hydrologic cycle can
transport contaminants great distances and, depending on geography, to great depths. Even the deepest
wells with sound well casings can become contaminated. Water quality in ground water sources fluctuates
constantly - clean water today does not guarantee clean water tomorrow.
The MAYTAG Whole Home Water Filtration System significantly reduces bacteria, viruses, and parasites
from drinking water using ZENON’s patented Water Filtration hollow fibre membranes.10
7
Please refer to NSF and laboratory certifications for performance information.
Please refer to NSF and laboratory certifications for performance information.
9
Please refer to NSF and laboratory certifications for performance information.
10
Please refer to NSF and laboratory certifications for performance information.
8
3-5
3.4.3.2 Particulate Iron
Two different processes lead to the formation of particulate iron. Oxygen rich surface waters can enter
wells, oxidizing the dissolved iron to particulate iron, and/or iron corrosion can occur. In the latter case,
high acidity water breaks down naturally occurring iron-rich minerals. The iron does not dissolve and
enters the water supply as larger particles. In both cases, when drawn, the reddish water will contain
visible iron particles. Given time these particles will settle making the water clear.
The MAYTAG Whole Home Water Filtration System can significantly reduce particulate iron.11
3.4.3.3 Colloidal Iron
Colloidal can be described as a combination of particulate and dissolved iron because it is composed of
very tiny particles that do not settle easily. As with particulate iron, colloidal iron imparts a red tinge to the
water.
The MAYTAG Whole Home Water Filtration system can reduce colloidal iron.12
3.4.3.4 Organic Iron (Iron Bacteria)
Iron bacteria are harmless bacteria that appear in water supplies with two vital components, a regular
supply of dissolved iron and dissolved oxygen. The main by-product of their existence is a jelly-like mass
that can clog water pipes and produce foul tasting water. Since these organisms are living, the most
effective way to eliminate them is to eliminate their food supply (iron) and stop them from entering the
household distribution piping.
3.4.3.5 Particulate Manganese
As with particulate iron, two different processes lead to the formation of particulate manganese – oxidation
or manganese corrosion. In the latter case, high acidity water breaks down naturally occurring manganeserich minerals. The manganese does not dissolve and enters the water supply as larger particles. In both
cases, when drawn, the dark brown water will contain visible manganese particles. Given time, these
particles will settle making the water clear.
The MAYTAG Whole Home Water Filtration system can reduce particulate manganese.13
3.4.3.6 Organic Manganese (Mangane se Bacteria)
Organic manganese is very similar to organic iron, with similar by-products and effects on water quality
and drinking water distribution systems.
3.4.3.7 Sulphur Water (Hydrogen Sulphide)
In the absence of oxygen, some harmless, non-pathogenic bacteria convert sulphate, leached from rocks,
into hydrogen sulphide. The gas readily dissolves in water sources and can be easily detected at very low
concentrations by its characteristic rotten egg smell. It causes most metals to corrode and tarnishes
silverware. In cases where there are high concentrations in confined areas, this gas may become both
poisonous to humans and flammable. Hydrogen sulphide is generated in drinking water in two locations:
naturally in the environment and in household drinking water distribution systems. When the formation is
in the environment, the raw water supply will show hydrogen sulphide levels upon testing. In drinking
water distribution systems, it cannot be diagnosed by testing the raw water because of where the problem is
produced. Usually localized in the hot water tank, harmless sulphate reducing bacteria digest sulphate from
the raw water, with the help of manganese, to produce hydrogen sulphide.
11
Not performance Tested and Certified by NSF.
Not performance Tested and Certified by NSF.
13
Not performance Tested and Certified by NSF.
12
3-6
3.4.3.8 Turbidity
Existing in all raw water supplies, turbidity is a physical clouding of water. Turbidity can be comprised of
mud, silt, clay, and other sediments in water, in addition to some biological species, like algae and sulphur
bacteria (string-like fibre). Whatever the source, the end results are always the same - the water is cloudy.
Turbidity does not usually present a health risk, but has been known to interfere with disinfection processes
in water treatment plants.
The MAYTAG Whole Home Water Filtration system can reduce turbidity.14
3.4.4
Surface Water Quality Concerns - MAYTAG Solutions
3.4.4.1 Microbial Contamination
Failing household septic systems and agricultural runoff may contribute to increased incidences of surface
water contamination. These may include bacteria, viruses, and parasites. In order to reduce the human
health risks associated with these organisms, treatment is required prior to use. Residences that are not
serviced by municipally treated water supplies are at greater risk, unless they provide some sort of
treatment to eliminate these contaminants.
The MAYTA G Whole Home Water Filtration System significantly reduces bacteria, viruses, and parasites
from drinking water using ZENON’s patented Water Filtration hollow fibre membranes.15
3.4.4.2 Turbidity
Turbidity, described above in section 3.4.3.8, can also affect surface water quality.
3.4.5
MAYTAG Model Description And Raw Water Quality Applications
The MAYTAG Whole Home Water Filtration System is available in three models, each having its source
water applications and flush program choices. Each model is uniquely equipped to treat a specific source
water type.
14
15
Please refer to NSF and laboratory certifications for performance information.
Please refer to NSF and laboratory certifications for performance information.
3-7
Table 1a. System design parameters
MAYTAG Model and
equipment
MWF 4100 AWS
Equipped with Carbon
prefilter, base controller.
MWF 4200 AWS
Equipped with Stainless
Steel prefilter, base
controller.
MWF 4300 AWS
Equipped with Stainless
Steel prefilter, advanced
controller and External
Prefilter.
Application
Household
occupancy
(persons)
Water use **
(USgpd/ L/d)
Raw Water
Turbidity**
(NTU)
chlorinated
municipal
water
6 or less
Up to 400gpd
(1500L/d)
<0.5, peaks to 1.0
(<5% of time)
clean ground
water
6 or less
Up to 400gpd
(1500L/d)
<0.5, peaks to 1.0
(<5% of time)
surface water
6 or less
Up to 400gpd
(1500L/d)
<5.0, peaks to 10
(<5% of time)
**In cases where these values are to be exceeded, consult MAYTAG Technical Assistance at 1-800-7562926.
See Section 5.4.7.3 and 5.4.8.3 ,“Controller Program Settings”, for additional information on controller
programs.
Table 1b. Mineral and colour parameters
Iron (Fe)
<5.0mg.L
Manganese (Mn)
<0.5mg/L
Apparent Colour
3.5
If raw water exceeds these
concentrations, a manganese greensand
filter is recommended.
30-50TCU
Water Treatment Technologies - Comparisons
There are a number of water conditioning and filtration products on the market today, some of which
compete directly with the MAYTAG Whole Home Water Filtration System. This section reviews a
number of different technologies and compares them to the MAYTAG product. It gives MAYTAG Sales
and MAYTAG Customer Care a larger depth of knowledge so that they can talk to prospective buyers
about all of the different options in the marketplace today.
The information in this section is of a general nature only. It has come from research on the Internet and at
various manufacturers’ trade shows, and from the general knowledge and experience gained from operating
various types of systems. If asked, the consumer should be informed that they are free to contact
competitors to obtain detailed descriptions of the characteristics of their particular system.
3.5.1
Carafe (Pitcher) Style Water Treatment Devices
These devices are very popular with consumers and serve a large portion of the household water treatment
market because of their low initial cost. Primary uses are to eliminate the unpleasant tastes and odours
typically associated with chlorine and other organic compounds. Carafe devices can also remove some
particles from water, but do not typically remove bacteria, viruses, or parasites. For the most part, these
3-8
devices use carbon to remove the unwanted chemicals. Very low flow rates and added resins have recently
allowed these systems to remove other contaminants such as lead, copper, and zinc.
3.5.1.1 Carafe Disadvantages
The following are a number of notable disadvantages as compared to the MAYTAG Whole Home Water
Filtration System. Most carafe style devices:
•
•
•
•
•
do not significantly reduce bacteria, viruses and cysts,
are not recommended for use on microbiologically unsafe waters,
do not filter bacteria that may grow in their activated carbon beds,
are less convenient because regular filling and frequent cartridge changes are required,
have very low filtration rates.
3.5.1.2 Carafe style filters:
•
•
3.5.2
only treat water for drinking and potentially cooking,
require more frequent replacement.
Point Of Use (POU) Faucet Mount Filter
Due to their convenience, POU Faucet mounted filters have grown in popularity with consumers. These
devices are threaded directly onto the faucet head at the point of use. An evolution of the carafe style filters
and using the same technologies, these filters are able to treat a variety of additional drinking water
concerns. These include chlorine, hydrogen sulphide, lead, parasites, asbestos, and industrial pesticides.
3.5.2.1 Faucet Mount Device Disadvantages
The following are a number of notable disadvantages as compared to the MAYTAG Whole Home Water
Filtration System. Most faucet mount devices:
•
•
•
•
3.5.3
are not physical barriers to bacteria, viruses and cysts,
do not filter bacteria that may grow in their activated carbon beds,
only treat water for drinking and potentially cooking from a single tap,
require more frequent replacement.
Point of Use (POU) Reverse Osmosis System (Economy Version)
Reverse Osmosis systems have become very popular because they are perceived to produce much cleaner
water than the carafe and POU faucet mounted filters. Using a semi-permeable membrane combined with
an activated carbon filter, reverse osmosis systems are able to reject hardness ions and industrial chemicals.
Installations include a sediment prefilter (to prevent premature membrane clogging), an activated carbon
prefilter (to eliminate chlorine which can damage the reverse osmosis membrane material), and a post
membrane activated carbon filter for polishing.
3.5.3.1 POU RO Disadvantages
The following are a number of notable disadvantages as compared to the MAYTAG Whole Home Water
Filtration System. Most POU RO devices:
•
•
•
•
•
•
are not recommended for use on microbiologically unsafe waters,
only treat water for drinking and cooking,
have pre and post filters that require more frequent replacement to ensure chlorine does not
damage RO membrane,
waste more water (25% efficiency),
have membranes that can be damaged if exposed to chlorine for extended periods,
remove all minerals (essential and non-essential).
3-9
3.5.4
Point Of Entry (POE) Reverse Osmosis System
A larger version of the POU systems, this treatment device delivers reverse osmosis quality water to the
entire household. The current market for this product is limited because of the cost and water recovery of
these systems. Since much more water is required for the entire house as opposed to a single tap, water
loss becomes a larger issue.
3.5.4.1 POE RO Disadvantages
The following are a number of notable disadvantages as compared to the MAYTAG Whole Home Water
Filtration System. Most POE RO systems:
•
•
•
•
•
•
•
•
•
•
•
•
3.5.5
have very low peak flow rates and as a result require a large storage capacity,
may require extensive renovations because of their large footprints,
have higher whole house water costs ,
have prefilters that require more frequent replacement,
have very low recoveries (25% - 50% recovery),
have a raw water hardness limitation16 (17 mg/l or 1 grain/gal.),
have a raw water iron limitation 17 (0.1 mg/l),
have a raw water manganese limitation 18 (0.05 mg/l),
have much higher energy costs (requires dedicated pump),
have high energy consumption to produce filtered water,
can cause problems with piping, as RO water is corrosive on copper piping,
remove all minerals (essential and non-essential).
Point Of Entry (POE) Ultraviolet Sterilization
This technology has gained popularity in recent years because of its availability and non-chemical
microbiological disinfection claims. With proper preconditioning, this technology can effectively
inactivate microbiological threats from drinking waters.
3.5.5.1 POE UV Disadvantages
The following are a number of notable dis advantages as compared to the MAYTAG Whole Home Water
Filtration System. Most POE UV systems:
•
•
•
•
•
•
•
•
•
•
do not provide a physical barrier to bacteria, viruses and cysts,
allow inactivated pathogens to be consumed after disinfection,
are not all proven to inactivate cysts,
can potentially allow dangerous microorganisms into the household water distribution system
during power outages or when UV lamps turn off .
have a raw water colour and organic limitation that lead to premature fouling of system lowering
the treatment effectiveness,
have a raw water hardness limitation 19 (105 ppm or 7 grains per gallon),
have a raw water iron limitation 20 (0.3 ppm),
have a raw water manganese limitation 21 (0.05 ppm),
have much higher energy costs,
do not lower turbidity.
16
Source water levels higher than this should be prefiltered to ensure optimum membrane performance.
Source water levels higher than this should be prefiltered to ensure optimum membrane performance.
18
Source water levels higher than this should be prefiltered to ensure optimum membrane performance.
19
Source water levels higher then this should be prefiltered to ensure optimum UV performance.
20
Source water levels higher then this should be prefiltered to ensure optimum UV performance
21
Source water levels higher then this should be prefiltered to ensure optimum UV performance
17
3-10
3.5.6
Point of Entry (POE) Ozone
A relatively new technology for the consumer market, ozone disinfection technology is becoming an
alternative for water treatment and disinfection. This technology produces a chemical reaction that
converts regular oxygen (O2 ) into Ozone (O3 ). Ozone reacts strongly with many compounds through a
process called “oxidation”. Ozone systems have the potential to treat a number of drinking water issues
when applied in combination with filtration systems and specialized media filters. These contaminants
include:
•
•
•
•
•
Dissolved Iron,
Dissolved Hydrogen Sulphide (rotten egg smell),
Dissolved Manganese,
Arsenic,
Total Organic Carbon (TOC).
In addition to these water contaminants, ozone has the potential to inactivate bacteria, viruses, and parasites
under the proper conditions.
3.5.6.1 POE Ozone Disadvantages
The following are a number of notable disadvantages as compared to the MAYTAG Whole Home Water
Filtration System. Most POE Ozone systems:
•
•
•
•
•
•
•
•
•
•
•
3.5.7
do not provide a physical barrier to bacteria, viruses and cysts,
allow inactivated pathogens to be consumed after disinfection,
are not proven to inactivate cysts,
have a raw water colour and organic limitation that lead to premature fouling of system lowering
the treatment effectiveness,
produce ozone, which at certain concentrations is a dangerous gas and is toxic to humans,
cannot produce the required ozone to inactivate potentially harmful bacteria, viruses, and parasites
during power outages,
have much higher energy costs because ozone production systems typically required higher
energies,
are affected by lower temperatures (less efficient ozone production),
are affected by pH levels above 6.5 (reactions are much slower),
are affected by turbidity in water,
require very high oxygen quality to produce the required amounts of ozone.
Point Of Entry (POE) Chlorine Dosing Systems
Chlorine Dosing Systems have been used since the 1800’s to reduce the occurrence of waterborne disease
outbreaks in society. These systems are very effective against bacteria and viruses that may be introduced
into a drinking water supply. In addition to its disinfection properties, chlorine, in combination with
filtration systems and specialized media filters treat a number of other drinking water concerns. These
include:
•
•
•
•
•
Dissolved Iron
Dissolved Hydrogen Sulphide (rotten egg smell)
Arsenic
Radon
Total Organic Carbon (TOC)
Point of entry chlorine dosing systems are commonly used and recommended by municipalities as a
secondary barrier to pathogens.
3-11
3.5.7.1 POE Chlorine Dosing System Disadvantages
The following are a number of notable disadvantages as compared to the MAYTAG Whole Home Water
Filtration System. Most POE Chlorine Dosing systems:
•
•
•
•
•
•
•
•
•
•
3.5.8
do not provide a physical barrier to bacteria, viruses and cysts,
allow inactivated pathogens to be consumed after disinfection,
have a raw water colour and organic limitation that lead to premature fouling of system lowering
the treatment effectiveness,
create taste and odour issues at higher concentrations,
are not very effective against parasitic cysts such as Cryptosporidium Cysts or Giardia Cysts,
have lower disinfection properties and oxidation potential at lower temperatures,
are affected by pH levels above 6.5 (reactions are much slower),
are not a physical barrier to contaminants,
do not operate during power outages,
can have chlorine in holding tank lose effectiveness if stored open to air for extended periods of
time (>2 months).
Point Of Entry (POE) Sand Filtration
This treatment device has been used traditionally in municipal treatment for its capability to remove
turbidity from source waters. Consisting of sand media, particles get trapped and are flushed from the bed
regularly by reversing the flow of water to drain.
3.5.8.1 POE Sand Filter Disadvantages
The following are a number of notable disadvantages as compared to the MAYTAG Whole Home Water
Filtration System. Most POE Sand Filters:
•
•
•
•
do not provide a physical barrier to bacteria, viruses and cysts,
allow inactivated pathogens to be consumed after disinfection,
have a raw water colour and organic limitation that lead to premature fouling of system lowering
the treatment effectiveness,
do not improve taste or reduce odours.
3-12
3.5.8.2 Point of Entry Water Filtration Review
System
Capabilities
Removes
bacteria and
virus
Removes
parasites
(cryptosporidium
& giardia)
Efficient self
cleaning
Keeps filtering
when power fails
Improves taste
Removes
cloudiness
MAYTAG ULTRA- Ozone Reverse Chlorine
Whole
Violet Systems Osmosis System
Home
Systems
Systems
Water
Filtration
Yes
No
No
Yes
No
Yes
No
No
Yes
No
Yes
Some
No
No
No
Yes
No
No
Yes
Some
Yes
Yes
No
No
No
No
Some
Yes
No
No
3-13
4 MAYTAG Whole Home Water Filtration System
4.1
General System Description
The core of the MAYTAG Whole Home Water Filtration System is the proprietary ZENON hollow fibre
ultrafiltration membrane. It is patent protected and manufactured by ZENON Environmental Inc., located
in Oakville, Ontario, Canada for use in household drinking water applications. The MAYTAG Whole
Home Water Filtration System operates on existing water pipe pressure to produce cleaner, filtered water.
Because it is installed at the point where water enters the home, the System filters the entire water supply.
Homeowners may choose to install a separate bypass for outdoor uses, such as lawn watering and
automobile washing.
Figure 4.1 – System Diagram
4-1
4.2
Hollow Fibre Water Filtration Membrane
The MAYTAG Whole Home Water Filtration System contains thousands of individual hollow fibre
membrane strands, shown in Figure 4.2 that act to filter tiny particles including bacteria, parasites and
certain cysts from water sources. The hollow fibre membrane works on a very simple principle. The water
pressure forces water from the outside of the fibre to the inside. Tiny particles are left behind and are
flushed to drain during the automatic daily cleaning cycle.
Approx. 1 mm
(0.04 inches)
Figure 4.2 – ZENON Hollow Fibre Ultrafiltration Membrane
Figure 4.3 – Microscopic Particle
on Unltrafiltration Membrane
Membrane fibres have billions of
microscopic pores on the surface.
The pores form a barrier to
impurities, while allowing pure
water molecules to pass.
4.2.1
Filtration Spectrum
Filtration is defined as the separation of one or more components from a fluid stream. The MAYTAG
Whole Home Water Filtration System utilizes a hollow fibre ultrafiltration (UF) membrane that contains
pores that are very small (microscopic). The membrane can remove tiny particles including bacteria, cysts
and certain viruses.
4-2
4.2.2
•
•
•
•
•
•
•
•
4.2.3
MAYTAG Whole Home Water Filtration System Advantages
Convenience
Unlimited Supply on Demand
Pure Tasting Water
Safer Water
No Electricity Required for Filtering (uses system
pressure)
Daily Self-Cleaning
Small Footprint
Minimal Maintenance
Why Membrane Technology is the Solution to Water Problems
Membrane Technology is the solution to water problems for several different reasons.
Membranes Provide:
•
•
•
•
•
4.3
A physical barrier
Superior treated water quality
Non-specific removal of pathogens
Reliable, non-chemical natural treatment
Opportunity to lower cost below other treatment methods
MAYTAG Whole Home Water Filtration System Overview
The MAYTAG Whole Home Water Filtration System has been designed with simplicity in mind. The
components work effectively together to provide cleaner and clearer, filtered water. The System is shown
in Figure 4.3.
4.3.1
Air Vent
The Air Vent allows air into the System when it is being drained and out of the System when it is being
filled during installation or maintenance. In some locations, water aquifers contain high levels of gases that
get released when pumped. The air vent ensures that gases do not build up inside the MAYTAG Whole
Home Water Filtration System.
Some gases that are released from drinking water may be hazardous to human health. Special venting
may be required to avoid hazardous gas accumulation in households. Follow local plumbing codes for
proper venting requirements.
4.3.2
Cap
The Cap seals the MAYTAG Whole Home Water Filtration System and provides access to the MAYTAG
prefilters.
4-3
4.3.3
Prefilter Housing
The Prefilter Housing chamber has been specially designed to house the MAYTAG Carbon Prefilter or
Stainless Steel Prefilter.
4.3.4
System Housing
The System Housing, contains the patented ZENON hollow fibre ultrafiltration membrane. This System is
the centre of the entire MAYTAG Whole Home Water Filtration System. Small particles including
bacteria, parasites and certain viruses are removed from the water and held until they are automatically
flushed to drain once per day. There are thousands of individual hollow fibres that allow maximum
household flow with minimum pressure loss.
4.3.5
Backpulse Tank
The Backpulse Tank pushes filtered water through the membrane fibres, in reverse direction, to expel any
trapped particles from the membrane pores. Backpulsing occurs during the Automatic Daily Cleaning
Cycle (see section 4.4.3).
4.3.6
Lock Ring
The Lock Ring provides stability between the System Housing and the Backpulse tank. This component
does not provide System sealing.
4.3.7
Stand
The Stand provides support and stability for the MAYTAG Whole Home Water Filtration System. The
Stand is connected to the Backpulse Tank and fastened to the household floor.
4-4
Figure 4.3 - MAYTAG Whole Home Water Filtration System
4.4
4.4.1
MAYTAG Whole Home Water Filtration System Operation
MAYTAG Whole Home Water Filtration Cycle
After installation and commissioning, the MAYTAG Whole Home Water Filtration System is ready to
produce cleaner and clearer filtered water. The process is shown in Figures 4.4 and 4.5. When the
homeowner uses a household fixture, the water pressure forces unfiltered water into the Prefilter Housing
(1). When using the carbon prefilter, larger particles and chlorine are removed as the water passes from
outside of the prefilter to the inside. The prefiltered water then passes down into the System (2). The water
travels from the outside of the hollow fibre membrane to the inside, leaving behind unwanted particles such
as bacteria, parasites and certain viruses 22 (3). The filtered water then travels from the clean water section
of the filter to the household piping and to the household fixture that is being used (4).
22
Please refer to NSF and laboratory certifications for performance information.
4-5
(1)
(1)
(2)
(3)
Figure 4.5 – Membrane Cross Section
(4)
Figure 4.4 – Water Filtration Cycle
4.4.2
Automatic Front / Backflush Cleaning Cycle (All Models)
The Automatic Front / Backflush Cleaning Cycle allows the MAYTAG Whole Home Water Filtration
System to operate for extended periods of time without System maintenance and/or replacement. Systems
applied to municipal, cistern, and well sources use this method for Automatic daily cleaning. The cycle
occurs once every twenty-four hours, at a time designated by the homeowner. A typical Double Front /
Backpulse sequence uses approximately 45 litres (12 USgal) of water.
Ideally, the flush cycle is programmed to occur at a time when household water is not being used and the
water pressure in the household piping and the MAYTAG Whole Home Water Filtration System is the
same as the water main pressure. Water taps may still be used during this time, but a slight drop in water
pressure may be noticed. The use of water taps during this cleaning cycle will not affect the cleaning or
performance of the MAYTAG Whole Home Water Filtration System.
The process is shown in Figures 4.6 and 4.7. The System Controller opens the Drain Valve (3), which
immediately drops the System pressure. The higher-pressure water upstream of the filter (1) immediately
rushes into the lower-pressure System (2) and then exits the System through the drain valve (3). This is
the Frontflush. At the same time, the higher-pressure water in the backpulse tank (4) rushes backwards
through the membrane (5) until the pressure has been equalized. This is the Backflush. These processes
together provide two important functions:
•
Frontflush – Scours the outer surface of the membrane fibres and carries dirt particles to drain,
4-6
•
Backflush – Expels trapped dirt particles from the Water Filtration Membrane pores so that the
front flush can carry them to the drain.
(1)
(5)
(2)
(3)
Figure 4.6 – Membrane Cross Section-Backflush
(4)
Figure 4.7 – Front / Backflush Cleaning Cycle
4.4.3
Automatic Drain Cleaning Cycle (MWF 4300 AWS only)
The Drain Cleaning Cycle was developed to supplement the Front / Backflush cleaning cycle. This
additional cleaning step addresses source related water problems associated with raw lake and river water.
This rigorous cleaning method involves completely draining the System. It aids in extending the membrane
life by physically scouring the sticky organic and / or mineral particles from the membrane surface and
sending them to drain during every automatic cleaning cycle. A typical Double Front / Backpulse Drain
Cycle uses approximately 64 litres (17 USgal) of water.
The flush cycle should be programmed to occur at a time when household water will not be used and the
water pressure in the household piping and the MAYTAG Whole Home Water Filtration System is the
same as the water main pressure. The water supplied to the rest of the house is temporarily cut off during
the Automatic Drain Cleaning cycle while the System drains and refills itself.
In all drain cleaning cycle cases, the Advanced Controller is required. It initiates a series of Front /
Backflush cycles to loosen and expel any particles from the MAYTAG Whole Home Water Filtration
System pores. See 4.4.2 Automatic Front / Backflush Cleaning Cycle for more information. The process is
shown in Figures 4.8 and 4.9. The Controller then initiates a complete System drain by closing the
Automatic Inlet valve (1) and opening the Automatic Drain Valve (2). As the water exits the Drain Valve,
the Air Vent allows air into the System (3) to prevent a vacuum from forming. The System drains until it is
4-7
empty at which point the automatic valves reverse and filling occurs. Once full, the System is again ready
to provide filtered water.
(3)
(1)
(2)
Figure 4.8 – System Cross Section Drain
Figure 4.9 – Drain Cleaning Cycle
4.5
MAYTAG Certification and Testing Summary
The MAYTAG Whole Home Water Filtration System conforms to ANSI/NSF 42/53 for the claims set out
below, as verified and substantiated by test data. Current MAYTAG System certifications, as well as the
limits to those certifications held, are listed below. Updates can be found on the MAYTAG website at
www.MAYTAG.com. For complete statistical analysis and full details of the certification and limits of
certification, MAYTAG Services Qualified Service Technicians are asked to review the studies
themselves, which are available upon written request from MAYTAG.
4.5.1
NSF Certifications
NSF International is the world’s leading testing and certification laboratory for Water Treatment Products.
4-8
Models: MWF 4200 AWS and MWF 4300 AWS:
System Tested and Certified by NSF International against
NSF/ANSI 42 and 53 for:
•Cyst Reduction
•Turbidity Reduction
•Particulate Reduction - Class 1
Model: MWF 4100 AWS:
System Tested and Certified by NSF International against NSF/ANSI
42 and 53 for:
•Cyst Reduction
•Turbidity Reduction
•Particulate Reduction - Class 1
•Chlorine, Taste and Odour Reduction
Chlorine Reduction Capacity Rating:
396,000/105,000 (litres/gallons)
Do not use the MWF 4100 AWS, with activated carbon filter option , with water that is
microbiologically unsafe or of unknown quality unless adequate disinfection before or after the
system. Models with activated carbon filter option certified for cyst reduction may be used on
disinfected waters that may contain filt erable cysts.
The MAYTAG Whole Home Water Filtration System and MAYTAG Whole Home Water Filtration System with Activated Carbon
Prefilter, should only be installed where the System and the installation complies with state and local laws and regulations. The
MAYTAG Whole Home Water Filtration System and MAYTAG Whole Home Water Filtration System with Activated Carbon
Prefilter should only be used to filter water that is cold. The MAYTAG Whole Home Water Filtration System and MAYTAG Whole
Home Water Filtration System with Activated Carbon Filter conforms with ANSI/NSF 42/53 for the specific performance claims as
verified and substantiated by test data.
The MAYTAG Whole Home Water Filtration System must be installed by a MAYTAG Services
Qualified Service Technician and properly maintained in accordance with the Owners Manual. Failure
to properly maintain the System will compromise performance and/or result in a failure to control water
quality.
The MAYTAG Whole Home Water Filtration System is not intended for the treatment of water, which
has an obvious contamination source (such as sewage or wastewater). Biofilm and pathogens in home
piping systems could shed into water after it has been filtered through our System. Exposure to
microorganisms may also occur during daily activities.
4-9
4.5.2
Independent Laboratory Testing Results – Biovir Laboratories
The following chart is a summary of the MAYTAG Whole Home Water Filtration System and MAYTAG
Whole Home Water Filtration System with Activated Carbon Prefilter Independent Laboratory Testing
results.
Independently Tested By BioVir Laboratories, Inc. ,
Benicia, California
The MAYTAG Water Filtration System has been independently tested by BioVir Laboratories, a California Department
of Health (CDH) Approved Laboratory. The test results were:
Bacteria Reduction* - greater than 99.99999%
Virus Reduction** - greater than 99.7%
* Tested with Echerichia coli bacteria
** Tested with Polio virus
4.6
MAYTAG Whole Home Water Filtration Options and Controllers
4.6.1
MAYTAG Whole Home Water Filtration Options
The MAYTAG Whole Home Water Filtration System is a versatile household water filtration tool.
Additional treatment options have been designed and developed to improve the operation of the MAYTAG
Whole Home Water Filtration System. These options enable the MAYTAG Whole Home Water Filtration
System to treat a number of different source waters including municipally supplied, cisterns, wells, lakes,
and rivers. The options include the:
•
•
•
MAYTAG Carbon Prefilter
MAYTAG Stainless Steel Prefilter
MAYTAG External Prefilter
4.6.1.1 Carbon Prefilter (included with MWF 4100 AWS)
Figure 4.10 - MAYTAG Carbon Prefilter
The Carbon Prefilter, shown in Figure 4.10, is installed, in accordance with the MAYTAG instructions, in
the top portion of the System. It is recommended for municipally chlorinated drinking water supplies
where the homeowner dislikes the aesthetic problems caused by chlorine. It performs two important tasks:
•
It significantly reduces residual chlorine and chlorine related tastes and odours that can be
unappealing to homeowners.
4-10
•
It protects and extends the life of the MAYTAG Whole Home Water Filtration System by
preventing large, sharp particles from entering the System.
Activated carbon works in a variety of different ways to remove contaminants from drinking water.
Chlorine removal requires a chemical reaction that combines a carbon atom with an oxygen molecule from
the water. The reaction produces carbon dioxide, a harmless gas. At the same time, the chlorine molecule
is split apart into individual chlorine ions. These ions attach to hydrogen from the water to produce very
small quantities of hydrochloric acid. The chemical reaction is shown in Figure 4.11.
Activated Carbon + Chlorine + Water → Carbon Dioxide + Hydrochlor ic Acid
or
Activated Carbon + Cl2 + H 2 0 → CO2 + 2HCl
Figure 4.11 - Chemical Reaction for Chlorine Reduction
The second method that activated carbon uses to remove contaminants is called “adsorption”, shown in
Figure 4.12. This is a process by “which matter adheres to the surface areas of a solid”23 . Activated carbon
works in this manner to attract and remove contaminants from the raw water stream. Adsorption allows
activated carbon to remove many man-made organic chemicals like pesticides (DDT) and gasoline
additives (MMX, MTBE) that may be present in drinking water. This same process reduces odours that are
typically associated with hot summer months and are termed “algae-blooms”. Easily detected by a musty,
earthy odour, “algae-blooms” are caused by the decay of harmless organisms and other organic material,
like leaves, that fall into drinking water sources and cannot be removed using conventional treatment
processes.
Although the MAYTAG Carbon Prefilter will have some success removing manmade organic
chemicals and organic particles associated with “algae-blooms”, it has not been performance
tested or certified by NSF to do so. Its strength lies in the reduction of chlorine and chlorinerelated tastes and odours. The life of the Carbon Prefilter will be reduced to different degrees
depending on the type and amount of the organic chemicals in the water supply.
Figure 4.12 - Activated Carbon Granules
23
Residential Water Processing, 2nd Edition, Wes McGowan, Water Quality Association, 1997, pp. 56
4-11
4.6.1.2 Factors that Affect Activated Carbon Performance
There are a number of factors that limit the ability of activated carbon filters to remove chemicals, such as
chlorine and other natural and man-made organic substances.24 These are:
•
Temperature – In general, lower temperatures favour the adsorption process. If the water
temperature rises enough, substances previously removed by the activated carbon might be
released into the treated water. The most efficient adsorption operating range for activated carbon
is 4.4o – 12.8o C (40o to 55o F). Temperature does not affect the reduction or re-release of
chlorine-like adsorbed chemicals - it is not held by the activated carbon, but converted to another
form before being released into the treated water.
•
pH (acidity of water) – As the pH decreases (water becomes more acidic) chlorine and organic
chemicals are more easily removed. The optimum pH for removing chlorine and other organics is
around 7.0, which is neutral (non-acid and non-basic) water.
•
Contact Time (time for water to flow through activated carbon filter) – In general, the contact
time in the filter dictates how effectively the contaminant is removed. This is a very important
factor for chemicals that require adsorbing. Reaction times vary for individual organic
contaminants and can be as long as several minutes. Chlorine, on the other hand, reacts very
quickly with the activated carbon surface and is easily removed even with shorter contact times.
The MAYTAG Carbon Prefilter provides approximately 11.5 seconds of contact time at a design
flowrate of 17 lpm (4.5 USgpm). This time is suitable for removing chlorine and chlorine-related
tastes and odours.
4.6.1.3 Activated Carbon and the Potential for Bacterial Growth
Since activated carbon filters remove organic nutrients from water, there is high potential for bacteria to
survive and, in some cases, thrive in their beds. These bacteria are typically harmless, but in higher
numbers can cause odd tastes and odours issues in the finished water.
The MAYTAG Whole Home Water Filtration System has been designed to eliminate these bacteria from
the finished water. The MAYTAG Carbon Prefilter has been placed upstream of the System so that
bacteria that may grow in the Carbon Filter are removed from the water before it enters the household
distribution piping.
24
Residential Water Processing, 2nd Edition, Wes McGowan, Water Quality Association, 1997, pp. 57
4-12
4.6.1.4 Stainless Steel Pre- Filter (included with MWF 4200 AWS and MWF 4300
AWS)
Figure 4.13 - MAYTAG Stainless Steel Pre- Filter
The Stainless Steel pre- filter, shown in Figure 4.13, is installed, in accordance with the MAYTAG
instructions, in the Prefilter Housing directly above the System. It is required for all installations that do
not use the MAYTAG Carbon Prefilter. It has been designed to be reused and can be cleaned by the
MAYTAG Services Qualified Service Technician using warm water, a soft brush, and household dish
detergent. The Stainless Steel Prefilter protects and extends that life of the MAYTAG Whole Home Water
Filtration System by stopping large, sharp particles from entering the System.
4.6.1.5 External Prefilter (included with MWF 4300 AWS)
Figure 4.14 - MAYTAG External Prefilter
The External Prefilter, shown in Figure 4.14, is a multiple density filter that is installed, in a dedicated filter
housing before the MAYTAG Whole Home Water Filtration System. It is required for all untreated
surface water sources, including lakes and rivers. It must be installed in addition to the Stainless Steel
Prefilter. The External Prefilter extends the life of the MAYTAG Whole Home Water Filtration System by
reducing the organic particles and nuisance microorganisms (zebra mussels) that enter the System. It also
acts as a secondary protection barrier for the MAYTAG Whole Home Water Filtration System by stopping
large, sharp particles from entering the System. The external prefilter filters down to a pore size of 10
microns prior to the MAYTAG Whole Home Water Filtration System.
4-13
When treating surface water sources, the MAYTAG External Prefilter is required. Failure to provide
this level of prefiltration may lead to System damage endangering the homeowner, potentially causing
injury and in serious cases even death.
4.6.2
MAYTAG Controllers
The main function of the MAYTAG System Controller is to perform automatic daily cleaning of the
System. In order to address the different water types, sources and qualities, a series of System Controllers
were developed. All are listed and described below.
4.6.2.1 Base Controller25 (included with MWF 4100 AWS and MWF 4200 AWS)
The Base Controller has been designed for use on municipally treated, well, and cistern sources with
turbidities up to 1.0 NTU (turbidity units). The Base Controller provides a daily cleaning procedure by
performing a number of front / backpulse cycles. As a result, cleaning effectiveness for surface waters and
for sources that have turbidity levels greater than 1.0 NTU is limited.
Figure 4.15 - MAYTAG Base Controller
The Base Controller, shown in Figure 4.15, can be programmed to perform a number of different Front /
Backflush sequences depending on the quality of the water within the constraints given below. This
Controller uses 2 “AA” batteries to save the program settings during power outages. It also contains a fuse
to prevent internal damage during lightning events or other power surges.
4.6.2.1.1
Base Controller Application Summary
Table 4.1 - Base Controller Applications
Program
Water Quality Requirements,
Source Water Turbidity (NTU)
Household Water Use
Household
Occupants26
#1
<0.5
Up to 1135 LPD (300 USgpd)
Up to 4 people
#2
<0.5 Peaks to 1.0NTU, <5% of time
Up to 1135 LPD (300 USgpd)
Up to 5 people
#3
<0.5 Peaks to 1.0 NTU, <5% of time
Up to 1510 LPD (400 USgpd)
Up to 6 people
25
Base Controller has not been performance tested and certified by NSF.
26
Based on 350 litres (93 USgal) per day per capita.
4-14
The programs are described in more detail below. In each program, typical use patterns are defined as
water use of approximately 284 litres/day (75 USgpd) per person in the household.
•
Program #1 Double Front / Backflush Cycle (3 minutes, 45 litres (12 USgal) water use). This program should be used for all residential applications that use up to 1135 litres/day (300
USgpd). Based on typical use patterns, under normal conditions, this program can be used for
households with up to four (4) occupants. This factory set default sequence will be sufficient for
most North American installations. Program #1 performs two consecutive Front / Backflush
Cycle once per day. This option uses the least amount of water and takes the least amount of time
to complete.
•
Program #2 Triple Front / Backflush Cycle (5 minutes, 68 litres (18 USgal) water use) - This
program should be used for all residential applications that use up to 1135 litres/day (300 USgpd).
Based on typical use patterns, under normal conditions, this program can be used for households
with up to five (5) occupants. This sequence provides three consecutive Front / Backflush Cycles
once per day. This program can be set if the homeowner has detected a rapid drop in flow rate
from household water fixtures, indicating accelerated System fouling.
•
Program #3 Quadruple Front / Backflush Cycle (7 minutes, 90 litres (24 USgal) water use) This program should be used for all residential applications that use up to 1510 litres/day (400
USgpd). Based on typical use patterns, under normal conditions, this program can be used for
households with up to six (6) occupants. The most rigorous of all Base Controller flush
sequences, this program performs four consecutive Front / Backflush Cycles once per day. This
program can be used to increase the degree of flushing and extend the life of the System.
4.6.2.2 Advanced Controller27 (included with MWF 4300 AWS)
The Advanced Controller has been designed for use on all water sources having turbidities up to 5.0 NTU
(turbidity units), with peaks of up to 10 NTU for up to 5% of the time. The Advanced Controller must be
used for lake and river waters because it uses the Drain Cleaning Cycle in addition to the Front / Backflush
Cleaning Cycle to enhance the daily cleaning effectiveness.
Figure 4.16 - Advanced Controller
The Advanced Controller, shown in Figure 4.16, can be programmed to perform a number of different
cleaning sequences, depending on the quality of the water within the constraints given above. This
Controller uses 1 “AA” battery to save the program setting during power outages. It also contains automatic
circuit protection to prevent the internals from being damaged during lightning events or other power
surges.
27
Advanced Controller has not been performance tested and certified by NSF.
4-15
4.6.2.2.1
Advanced Controller Application Summary
Table 4.2 - Advanced Controller Applications
Program
Water Quality Parameters
Household Water Use
#1
Municipal and Well Waters (<0.5
NTU)
Up to 1135 LPD (300 USgpd)
Up to 4 people
Up to 1135 LPD (300 USgpd)
Up to 4 people
Up to 1510 LPD (400 USgpd)
Up to 6 people
#2
Municipal and Well Waters (<0.5 NTU
with peaks to 1.0 NTU <5% of time)
#3
Household
Occupants28
#4
Well, Surface (<1.0 NTU with peaks to
5.0 NTU, <5% of time)
Up to 1135 LPD (300 USgpd)
Up to 4 people
#5
Well, Surface (<5.0 NTU with peaks to
10.0 NTU, <5% of time)
Up to 1510 LPD (400 USgpd)
Up to 6 people
#6
N/A 29
N/A
N/A
The programs are described in more detail below. In each program, typical use patterns are defined as
water use of approximately 284 litres/day (75 USgpd) per person in the household.
28
29
•
Program #1 Double Fr ont / Backflush Cycle – Factory Set Default – See Table 4.2 for water use
and occupants. This sequence will be sufficient for most North American installations with low
water turbidities. Program #1 performs two consecutive Front / Backflush Cycles once per day.
•
Program #2 Triple Front / Backflush Cycle – See Table 4.2 for water use and occupants. For a
more rigorous flush, the program can be used to perform three consecutive Front / Backflush
Cycles once per day. This program can be set if the homeowner has detected a rapid drop in flow
rate, indicating accelerated System fouling.
•
Program #3 Quadruple Front / Backflush Cycle – See Table 4.2 for water use and occupants.
This program performs four consecutive Front / Backflush Cycles once per day. It can be used to
increase the degree of flushing and extend the life of the System, if required.
•
Program #4 Double Front / Backflush Single Drain Cycle – See Table 4.2 for water use and
occupants. It allows the System to be Front/Backflushed twice followed by a single drain cycle.
•
Program #5 Double Front / Backflush Double Drain Cycle – See Table 4.2 for water use and
occupants. It allows the System to be Front/Backflushed twice followed by two consecutive drain
cycles.
•
Program #6 Output Diagnostics Program – This program can be set and initiated to test all of
the controller outputs. It will energize the automatic drain valve for 12 seconds, then energize the
automatic inlet valve for 12 seconds and then energize both automatic valves at the same time for
12 seconds.
Based on 284 litres (75 USgal) per day per capita.
Not Applicable – Program #6 is output diagnostics program.
4-16
4.6.2.3 Integrity Tester30
The main function of the Integrity Tester is to ensure that the System integrity meets the high standards of
MAYTAG. The Integrity Tester tests each of the fibres to American Standards (ASTM) to ensure that
complete household protection is maintained.
Because of its complexity and cost, the Integrity Tester will be used by MAYTAG Services Qualified
Service Technicians as a portable testing device during yearly maintenance activities.
Figure 4.17 - Integrity Tester
The Integrity Tester, shown in Figure 4.17, has all of the same programs as the Advanced Controller. This
Controller uses 1 “AA” battery to save the program setting during power outages. It also contains
automatic circuit protection to prevent the internals from being damaged during lightning events or other
power surges.
30
Integrity Tester has not been performance tested and Certified by NSF.
4-17
4.7
MAYTAG Product Matrix
MAYTAG
Model and
equipment
MWF 4100
AWS
chlorinated
municipal water
MWF 4200
AWS
MWF 4300
AWS
4.8
Application
External
Prefilter
Required
None
Internal
Prefilter
Required
Carbon
Controller
clean ground
water
None
Stainless Steel
Basic
surface water
External Prefilter
Stainless Steel
Advanced
Basic
Product Specifications
The table below outlines the operational limitations for all MAYTAG Whole Home Water Filtration
Systems.
Recommended Max Flow Rate Per/min (LPM/USgal)
Pressure Drop at 34 LPM (kPa/psi)*
34/9
41/6
Maximum working pressure (kPa/psi)
690/100
Minimum working pressure (kPa/psi)
241/35
Rated Capacity (L/USgal per day)**
1500/390
Minimum Temp (C/F)
>0/32
Maximum Temp (C/F)
<38/100
Approx flush volume (L/USgal)
45/12
System Efficiency
Controller Voltage
97%
120v
Base Width (m/in.)
0.45x0.45/18x18
Minimum height required (m/in.)
*At time of installation
** Depends on water quality and flow rate
1.88/74
4-18
5 MAYTAG Installation Instructions
The following section outlines the installation overview, the specific tools for installing a MAYTAG
Whole Home Water Filtration System and the installation and commissioning procedures.
To reduce the risk of severe injury, illness, death and/or property damage, read and follow all
instructions. Use only MAYTAG authorized parts, where required, to repair and service the MAYTAG
Whole Home Water Filtration System.
5.1
MAYTAG System Installation Location with Other Water Devices
If other water devices are currently installed in the home, the installation location of the MAYTAG Whole
Home Water Filtration System must follow Figure 5.1 below.
Water Inlet
to House
•
•
•
•
•
•
Filtered Water to
Household
Faucets
Pressure Tanks
Chlorinator Systems
UV System
Greens and
Sand Filter
Sediment Filter
Water Softener
Figure 5.1 – MAYTAG Whole Home Water Filtration System Installation Location
5.2
Typical Household Installations - Overview
All sales, installation and maintenance personnel are required to participate in the MAYTAG Services
Qualified Service Technician Program to ensure that they have been trained to MAYTAG standards. Since
the main objective of the MAYTAG Whole Home Water Filtration System is to remove bacteria, certain
parasites, and certain viruses from drinking water sources, this certification program is important and
mandatory for both safety and liability reasons.
All efforts must be made to ensure that installations are performed in a careful, sanitary manner for the
complete safety of homeowners and technicians.
The following section is a general overview of how the MAYTAG Whole Home Water Filtration System
is installed for different water sources.
5-1
NOTE: In order to allow only the indoor water to be treated, MAYTAG recommends that a
bypass around the MAYTAG Whole Home Water Filtration System be installed for all outside
hose bibs, irrigation systems, pool and hot tub makeup valves. This will also help to extend the
life of the MAYTAG Whole Home Water Filtration System.
5.2.1
Municipal and Well/Cistern Systems – MWF 4100 AWS and MWF 4200 AWS
Municipal systems provide treated water directly to households through a water distribution system. The
raw water can be taken from numerous sources, including wells and/or lake water. The water is treated
physically with mechanical filtration to raise the water quality to regional standards.
When the municipality does not supply water to households, a private pump/pressure tank style system is
required. These systems draw water from numerous sources including wells, cisterns (holding tanks), and
direct surface water (lakes or rivers). The recommended installation for well/cisterns and clean surface
water is the MWF 4200 AWS as shown in Figure 5.2. Cistern systems require a local water hauler to fill
the tank on a regular basis so that the household does not run out of water. These systems are often
supplemented by rooftop gutter collection systems. The only difference between the MWF 4100 AWS and
the MWF 4200 AWS is that the MWF 4200 AWS has a stainless steel pre-filter under the cap.
The MAYTAG Whole Home Water Filtration System is installed directly after the water meter as the
water enters the home, as shown in Figure 5.2.
Figure 5.2 – Municipal and Well/Cistern Installation Drawing, MWF 4100 AWS or MWF 4200 AWS
5-2
5.2.1.1
System Configuration for MWF 4100 AWS and MWF 4200 AWS
MAYTAG Whole Home Water Filtration System – installed directly after the household pressure tank.
This positioning helps the homeowner determine when the System requires replacement, since the
household water pressure and flow will decrease as the System becomes fouled.
Base Controller (provided)– Provides automatic daily flushing of the System.
Internal Prefilter (Carbon or Stainless Steel - provided) – The Internal Prefilter provides protection to
the MAYTAG Whole Home Water Filtration System, primarily from visible particles that would cause the
System to foul quickly. The Carbon Prefilter provides additional benefits in removing most undesired
tastes such as chlorine.
See section 4.8 for System Design Parameters.
5.2.2
Surface Water Systems –MWF 4300 AWS
For surface waters and dirty ground waters the recommended installation is the MWF 4300 AWS as shown
in Figure 5.3.
Figure 5.3 - Surface Water System (submersible pump), MWF 4300 AWS
5.2.2.1
System Configuration for MWF 4300 AWS
MAYTAG Whole Home Water Filtration System – installed directly after the household pressure tank.
This positioning helps the homeowner determine when the System requires replacement, since the
household water pressure and flow will decrease as the System becomes fouled.
5-3
Specialty Media Filter (not provided) – These types of water conditioners include softeners and
manganese greensand filters. Depending on the type of media filter, different water quality concerns such
as hardness, iron, manganese and hydrogen sulphide can be addressed. These filters should be installed
immediately downstream of the household pressure tank and upstream of the MAYTAG Whole Home
Water Filtration System.
Inlet Solenoid Valve (provided) – The Inlet valve is installed directly upstream of the MAYTAG Whole
Home Water Filtration System and is connected to the Inlet pipe assembly using a ¾” MNPT brass nipple.
Check Valve (provided) – The Outlet port also has a check valve. This will prevent air getting into the
water pipes of the house during the draining function.
Advanced Controller (provided) – Due to the higher fouling nature of surface water sources, the
MAYTAG Whole Home Water Filtration System requires more rigorous daily flushing.
External Prefilter Housing + Filter (provided) – All surface water systems must have an External
Prefilter installed. The External Prefilter Housing provides additional protection to the MAYTAG Whole
Home Water Filtration System from contaminants such as zebra mussels and other larger particles that are
seen in surface water sources. This prefilter is installed between the manual inlet ball valve and the
Automatic System Inlet Valve.
See section 4.8 for System Design Parameters.
When treating surface water sources, a maximum prefilter mesh size of 30 microns is required. Failure
to provide this level of prefiltration may lead to System damage. A damaged System will not perform
effectively, endangering the homeowner through possible serious personal injury and/or even death.
5.2.3
Pump/Pressure Tank Systems
5.2.3.1 Operational Theory
The operation of pump systems is very simple. The pressure in the system pressure tank (holding tank) is
maintained between a high and low-pressure setting using a pressure switch and a pump. When the system
pressure falls below the low-pressure setting, that is, when the household uses water, the pressure switch
mechanically closes an electrical contact, energizing the pump. When the pressure high setpoint is reached
by pumping water into the pressure tank, the switch mechanically opens the de-energizing pump. Pump
systems always operate in this fashion, regardless of the type of pump.
Systems are typically designed so that the pump operates for approximately 2 minutes before the tank is
full and does not turn on again for another minute during constant water usage. This operation ensures that
the electrical components of the system do not overheat.
5.2.3.2 Pressure Switch Review and Settings
There are a number of pressure ranges that are typical in houses, depending on the type of pump used,
system pressure losses, and individual homeowner preferences. Standard settings provide a 140 kPa (20
psi) difference between the high and low pressure setting. This setting allows for optimum pump operation
as described above (2 minutes on and 1 minute off cycling). The typical low/high-pressure settings that are
seen in households, depending on the pump type, are:
•
•
•
138 kPa / 276 kPa (20 psi / 40 psi)
206 kPa / 345 kPa (30 psi / 50 psi)
276 kPa / 413 kPa (40 psi / 60 psi) - recommended
5-4
Some pressure switches can be adjusted to work for all ranges. Pressure switch quality usually determines
how much adjustment can be made.
Note the 276 kPa / 413 kPa (40 psi / 60 psi) setting is recommended where possible.
5.2.4
System Drain
There are a number of different drain connection options for the MAYTAG Whole Home Water
Filtration System. The selected drain type depends on a number of factors that must be examined during
the initial pre -inspection process. These factors revolve around the water source and its associated water
concerns. (To be completed by MAYTAG Services Qualified Service Technician).
All drain installations require a proper “indirect” connection, which includes an adequate air gap that
follows the applicable plumbing codes. Improper connection may lead to cross-contamination between
the drinking water source and the waste water lines. Contaminated water may cause personal injury
and/or death.
MAYTAG recommends that a licensed plumber install MAYTAG drainage systems due to
complexities including air gaps, proper venting, drain sizing, and trap installation. Improper venting and
trap installation may lead to sewer gases backing up into the household. This may lead to personal
injury to the occupants.
5.2.4.1 Direct Surface Water Source Drains
Due to the high level of organic matter in surface water, the MAYTAG Whole Home Water Filtration
System requires complete System draining during the daily automatic flush sequence. Unless this is
performed, the System life will be shortened and the household water pressure will drop prematurely. This
requirement limits the number of drain options available since the System must drain by gravity. There are
three options that can be applied to this situation:
•
Floor Drain – Gravity Feed – Floor drains are installed flush to the floor and are below the
MAYTAG Outlet pipe assemb ly. The drain hose can be piped directly to the drain, which is
located in the same room as the MAYTAG Whole Home Water Filtration System.
•
Hub Drain – Gravity Feed – Hub drains are typically set about 6” above floor level. The hub
drain is below the clean water port on the MAYTAG Whole Home Water Filtration
System. The drain hose can be piped directly downwards to the drain, which is located in the
same room as the MAYTAG Whole Home Water Filtration System.
•
Self-contained sump/pump system (separate trap and possibly vent requirement) – This
method of draining is required only if the previous two cannot be used. When the floor or hub
drain is not located in the same room or is inaccessible, but a gravity drain is required, a separate,
self-contained sump/pump system is required. In some cases, the floor or hub drains do not exist
because the sanitary sewer level is above the floor level. This type of drain is more difficult to
install because it requires proper venting (to prevent sewer gases from entering the dwelling). It
must also be designed to compensate for waste flowrates during flushing procedures.
5-5
5.2.5
Municipal, Cistern and Well Sources
These sources typically foul less than direct surface water sources since they have far fewer organic
particles. As a result, the daily flushing procedure does not require a complete System drain. The
following drain options are available for these installations:
All drain installations require a proper “indirect” connection, which includes an adequate air-gap that
follows the applicable plumbing codes. Improper connection may lead to cross-contamination between
the drinking water source and the waste water lines. Contaminated water may cause personal injury
and/or death.
MAYTAG recommends that a licensed plumber installs MAYTAG drainage systems due to
complexities including air gaps, proper venting, drain sizing and trap installation. Improper venting and
trap installation may lead to sewer gases backing up into the household. This may lead to personal
injury.
•
Laundry Tub Drain – Pressurized Feed – A pressurized feed is required since the laundry tub is
higher than the clean water piping assembly on the MAYTAG Whole Home Water
Filtration System. This drain can be located in another room as long as the drain hose can be
fed to the drain location.
•
Floor Drain – Gravity Feed – Floor drains are level with the floor and are below the clean water
piping assembly on the MAYTAG Whole Home Water Filtration System. The drain hose
can be piped directly down to the drain without having to rise above the outlet pipe assembly.
•
Floor Drain – Pressurized Feed – This type of drain is used when the MAYTAG Whole
Home Water Filtration System is not in the same room as the floor drain and/or the drain line
must be raised above the outlet pipe assembly before going to the drain. In this case, the System
cannot be completely emptied automatically, but it can be flushed during the daily flush sequence.
•
Hub Drain – Pressurized Feed – This type of drain is similar to the Floor drain that requires a
pressurized feed when the MAYTAG Whole Home Water Filtration System is not located
in the same room and/or the drain line must be raised above the outlet pipe assembly before going
to the drain. In this case, the System cannot be completely emptied automatically, but it can be
flushed during the daily flush sequence.
•
Dedicated trap drain – Dedicated trap drains are required when the above 4 options are not
available or not desirable.
MAYTAG recommends that a licensed plumber install the dedicated trap drain system due to its
complexities, which include proper venting, drain sizing, and trap installation. Improper venting and
trap installation may lead to sewer gases backing up into the household. Improper drain sizing may lead
to cross contamination between the drinking water supply and the waste water lines. Contaminated
water may lead to personal injury and/or death.
5-6
5.3
Installation Requirements
The Drinking Water Tool Kit should be maintained in premium condition so that the risk of crosscontamination is minimized. Bacteria, parasites, and viruses can live for long periods of time. As a
result, dangerous organisms can be carried from one installation or maintenance site to another and may
potentially cause serious personal injury, sickness and/or death. Proper tool care and MAYTAG
disinfection procedures will minimize these risks. The procedures are described below.
Ball valves are recommended for use on all bypass, inlet and outlet plumbing from the System. Gate
valves have a tendency to leak and may cause personal injury, sickness and/or death.
The following list of tools and supplies are required (not provided) for installation:
Required hand tools and supplies
Hand Tools
fine slot driver: 1/8" x 4"
Phillips drivers: #0, 1
slip joint pliers: 12"
needle nose pliers
pipe wrench: 12"
adjustable wrench: 12"
torpedo level
tire pressure gauge (0-50psi)
tape measure: 3/4"x16'
open end wrench set: 3/8", 7/16", 1/2", 9/16", 5/8" (or
6” adjustable wrench)
Robertson driver: #1 (green), #2 (red), #3 (black)
Nut drivers: 5/16”, ¼”, 3/8”(optional)
tube cutter- to 1 1/4"
masonry drill bit: 3/8"
pencil
torch head (self lighting)
hammer drill
strap wrench- 36"
120VAC (or manual) air compressor
Integrity tester
press. gauge with septum needles (0-100psi) (2)
Snips
Cap Wrench
Supplies
teflon tape
flux
solder(lead free)
flux brush
emery cloth
propane or MPS gas
silicon grease- Dow 111 NSF approved
tie wraps: 10-14"
suspension strap
3/4" ball valves (3)
chlorine bleach, 5-6% or 12% chlorine
pipe dope(approved for potable)
3/4" brass union: soc x soc or flexhoses
3/4" 90's Cu (soc)
3/4" connectors Cu(soc)
3/4" T's Cu (soc)
1/2" ABS hose (70psi test)
1/2" PVC hose barb 90's
1"x3/4" PVC bushing (MNPTxFNPT)
misc 1/2" fittings
1/2-3/4" hose clamps
3/4" brass check valve(FNPT)
Spare parts
8" o-rings
aa batteries
air vent
1/4" FNPT test needle
1/4" MNPTxhose John Guest valve
base controller(complete)
adv controller(complete)
external prefiter dual density cartridge
3/4" brass T's FNPT
1/4" septum sample port
5-7
5.3.1
Drinking Water Tool Kit Disinfection
It is strongly recommended that all tools are disinfected prior to use. Disinfecting tools will reduce the
risk of cross-contamination between different job sites. Failure to disinfect tools could lead to crosscontamination. Contaminated water may cause sickness, serious personal injury and/or death.
5.3.1.1 Pressure Gauge Disinfection Procedure
All pressure gauges MUST be disinfected prior to use in order to avoid cross-contamination.
When performing this procedure, handle the disinfection solution with care. It is recommended that
protective gloves be worn to avoid skin contact with the chlorine based solution. Failure to follow these
guidelines may lead to skin irritation and/or damage to clothes.
Pressure gauge and brass gauge adaptor
The pressure gauge setup consists of two components: the pressure gauge and the brass gauge adaptor.
These are threaded together using Teflon® tape, as shown below. Each step in the disinfection procedure
is demonstrated in the accompanying figures.
Step 1 - Separate the pressure gauge from the
gauge adaptor.
Step 2 - Place and soak the gauge adaptor in
Household chlorine bleach for 5 minutes. Note the
brass adaptor will tarnish. This is acceptable.
5-8
Step 3 – Submerse the end of the pressure gauge
into the solution and maintain it in an upright
position for 5 minutes. Do not submerse entire
gauge into the sanitizer as it may damage the
internal components.
5.4
Step 4 – Reassemble the pressure gauge adaptor
with Teflon tape and tighten using the drinking
water tool kit wrenches.
Installation
The MAYTAG Whole Home Water Filtration System must be filled with water at all times after
installation. Failure to do so may cause the System to dry and become damaged, which may lead to
personal injury, and/or physical damage.
Ball valves (not supplied), must be used for the System to function properly.
Note: Some parts mentioned in the following sections are not supplied with the System. Be
familiar with the procedures, parts and requirements prior to an installation.
5.4.1
Pre-Installation Inspection
Prior to beginning the installation, look for the following items;
• Location for the MAYTAG Whole Home Water Filtration System
o Space near Point of Entry
o Level area
o Indoors with ambient temp between 40-90 F or 4 – 32 deg C.
o Footprint, minimum 18”x24” or 46cm x 61cm
o Clearance height (floor to ceiling, min 74” or 188cm)
o Drillable Floor
§ If there is floor heating, will require 2’x2’ patio stone and additional height.
§ If there is a wooden floor, will require ¼”screws and washers
• Electrical outlet, 120VAC within 10’
• Existing water equipment (water softeners, filters downstream and UV upstream)
• Household water pressure >35 psi (ideal 50-70 psi):
• Drain accessible within 20’ and up to 72” high for MWF 4100 AWS / MWF 4200 AWS and must
be gravity fed for MWF 4300 AWS.
5-9
5.4.2
Inside the System Box
The MAYTAG Whole Home Water Filtration System comes equipped with the following components:
MWF 4100 AWS
System Box Includes:
MWF 4200 AWS
System Box Includes:
MWF 4300 AWS
System Box Includes:
Backpulse Stand
2 – Stainless Steel Flex Hoses
Base Controller
Lock Ring
Owners Manual
Carbon Prefilter
System
Backpulse Tank
System Cap
Backpulse Stand
2 – Stainless Steel Flex Hoses
Base Controller
Lock Ring
Owners Manual
Stainless Steel Prefilter
System
Backpulse Tank
System Cap
Backpulse Stand
2 – Stainless Steel Flex Hoses
Advanced Controller
Lock Ring
Owners Manual
Stainless Steel Prefilter
System
Backpulse Tank
System Cap
External Prefilter Housing
Wall Bracket Kit
1 – 30 micron External Prefilter
Bubble Parts Bag Includes:
Bubble Parts Bag Includes:
Bubble Parts Bag Includes:
1 – N.C. Solenoid Valve
1 – Nylon Elbow
2 – ¾” Brass Tee
1 – N.C. Solenoid Valve
1 – Nylon Elbow
2 – ¾” Brass Tee
2 – ¾: Brass Bushing
2 – ¼” Brass Plug
2 – ¾” Brass Nipple
1 – Duo Vent
3 – ¾” Bolts
3 – ¼” x 2 ½” Anchors
3 – Nuts
3 – Shims
3 – Washers
1 – Labels (inlet, drain, bypass)
2 – ¾: Brass Bushing
2 – ¼” Brass Plug
2 – ¾” Brass Nipple
1 – Duo Vent
3 – ¾” Bolts
3 – ¼” x 2 ½” Anchors
3 – Nuts
3 – Shims
3 – Washers
1 – Labels (inlet, drain, bypass)
1 – N. C. Solenoid Valve
1 – N.O Solenoid Valve
2 – 1” MNPT x ¾” FNPT PVC
Reducing Bushing
1 – Drain Valve
1 – ¼” plug
1 – Nylon Elbow
2 – ¾” Brass Tee
2 – ¾: Brass Bushing
2 – ¼” Brass Plug
4 – ¾” Brass Nipple
1 – Duo Vent
3 – ¾” Bolts
3 – ¼” x 2 ½” Anchors
1 – Check valve
3 – Nuts
3 – Shims
3 – Washers
1 – Labels (inlet, drain, bypass)
5-10
System may be damp and slippery from the preserving process. Be careful not to drop System when
removing from the box. Wiping System with a clean, dry cloth will reduce the likelihood of dropping
the System.
5.4.3
Removal from Box
Step 1 - Open carton and cut away the end of the
carton at the bottom of the System. Remove the
bubble parts bag and back pulse stand.
Step 2 – Attach the backpulse stand to the
backpulse tank (with the System still in the box)
using the ¼” bolts and washers found in the bubble
parts bag.
Step 3 – Carefully tip System up out of the
System box, so that the System is sitting evenly
on the floor.
Step 4 – Apply Teflon tape to the ¼”MNPT fitting
located on the Air Vent. Screw the vent into the
cap, turning it clock-wise. Do not use tools to
tighten the air vent as it could cause damage.
Ensure that the black cap on the air vent is slightly
open by 1 ½ turns to ensure proper operation and
venting. Red cap to be closed.
Do not remove any seals or plugs from the System until the System is ready to be connected to inlet and
outlet assemblies.
When inserting air vent, be careful not to cross-thread the threads.
5-11
5.4.4
Pressurizing Backpulse Tank
Step 1 – Remove the schraeder valve cap from the
backpulse tank.
Step 2 – The backpulse tank should be prepressurized from the factory to 35 psi. Confirm that
the tank is pressurized to 35 psi using a digital
pressure gauge.
Step 3 – If the tank was not pressurized to 35psi,
pressurize it using an air compressor or hand air
pump. After at least 15 minutes, recheck the
pressure to ensure there are no leaks.
Step 4 – Following Table 5.1, release the pressure
in the backpulse tank to the required value for the
specific installation location. If too much pressure
is released, the tank must be re-pressurized to the
correct value. Release pressure by pressing on the
schraeder valve.
Step 5 – Replace the schraeder valve cap to the
backpulse tank.
5-12
Table 5.1 Backpulse Tank Pressure Chart
Installation Location
Backpulse pressure
Municipal
207 kPa (30 psig)
Well (20 psig low – 40 psig high cutoff)
140 kPa (20 psig)
Well (30 psig low – 50 psig high cutoff)
207 kPa (30 psig)
Well (40 psig low – 60 psig high cutoff)
207 kPa (30 psig)
Do not pressurize the System Backpulse Tank greater than 35 psig. Higher pressures may cause the
Backpulse tank bladder to burst, leading to ineffective daily cleaning of MAYTAG Whole Home Water
Filtration System. Ineffective cleaning of the MAYTAG Whole Home Water Filtration System can
greatly reduce the life of the System and in some cases lead to sickness and/or death.
5.4.5
Positioning and Pipe Assembly
Step 1 – Position the System approx. 6” from
where the piping will be. Drill a 3/8” hole through
the feet of the backpulse stand.
Step 2 – Using the supplied screws and anchors,
secure the System to the floor. Use each of the ¼”
screws for wooden floors and lag bolts for concrete
floor. If the System is to be installed on a heated
floor, use a 2’ x 2’ patio stone.
Step 3 – Check to see if the System is level.
Step 4 – Insert the supplied shims as required
under the feet, between the bolts, to help level the
System.
5-13
Step 5 – Make a final inspection to confirm that
the System is level.
Step 6 – Tighten the bolts to secure the System to
the floor.
Step 7 – Assemble the inlet and outlet devices.
Ensure that all threads are fitted with Teflon
tape. Attach the inlet device to the System
housing and the outlet device to the backpulse
tank.
Step 8 – For the surface water systems (MWF
4300 AWS), a normally opened solenoid valve
must be installed on the inlet assembly. The
External Prefilter must also be installed between
the normally opened solenoid valve and the inlet
ball valve (refer to Figure 5.3 in section 5.2.2) and
mounted on a wall.
5-14
48” (122 cm)
20” (50 cm)
Step 9 – For surface water systems (MWF 4300
AWS), a check valve must be installed to the ¾”
brass nipple on the outlet assembly.
Step 10 – Turn off household water. Plumb the
inlet (approx. 48” or 122 cm) and outlet (approx.
20” or 50 cm) pipes to the correct height. Use
Teflon tape on all threaded connections. Extra
care must be taken not to cross thread the ¾”
polypropylene nipple. [If soldered joints are used,
solder ¾” NPT adapter together with union and
allow to cool before threading into ¾” brass T.
Cut and fit inlet, outlet piping and by-pass (if
necessary). Use ball valves only]. NOTE: For
MWF 4300 AWS, plumbing must also be
completed for the External Prefilter, see section
5.5.3.
Step 11 – Connect the stainless steel flex hoses
from the plumbing to the ¾” nipple of the inlet
and outlet assemblies for MWF 4100 AWS and
MWF 4200 AWS.
Step 12 – Connect the stainless steel flex hose
from the plumbing to the check valve on the outlet
pipe and plumbing to the inlet solenoid valve on
the inlet pipe for the MWF 4300 AWS.
Be careful not to cross-thread the poly. nipple when installing piping assemblies.
5-15
¾” Poly Nipple to
System Housing
Test Port
Test Cap
Stainless Steel Flexhose
¾” x ¼”
Bushing
¾” FNPT
Brass “Tee”
¾” MNPT
Nipple
Figure 5.4 Diagram for Inlet and Outlet on MWF 4100 AWS and MWF 4200 AWS.
To System Housing
¾” Poly Nipple
Test Port
Test Cap
Solenoid Plug
Stainless Steel Flexhose
¾” FNPT
Brass “Tee”
¾” x ¼”
Bushing
¾” MNPT Nipple
N.O. Solenoid Valve
¾” MNPT
Nipple
NOT TO SCALE
Figure 5.5 Diagram for Inlet on MWF 4300 AWS
5-16
To System Housing
¾” Poly Nipple
Test Port
Test Cap
¾” MNPT Nipple
¾” MNPT
Nipple
Stainless Steel Flexhose
¾” FNPT
Brass “Tee”
¾” x ¼”
Bushing
Brass Checkvalve
NOT TO SCALE
Figure 5.6 Diagram for Outlet on MWF 4300 AWS.
Step 13 – Label the valves for the inlet and outlet Step 14 – Assemble the drain fitting by connecting
(and bypass if applicable), either on the pipe or on the drain solenoid to the ¾” PVC Nipple attached to
the handles, using the supplied labels.
the System drain port. Connect the nylon elbow to
the solenoid valve.
5-17
Step 15 – Fasten the ½” ABS drain hose to the
Nylon barb using a hose clamp (not provided).
Step 16 – Run the drain hose to the drain and secure
to prevent hose from moving during the backflush.
NOTE – MWF 4300 AWS must be a gravity fed
drain.
Step 17 – Ensure that there are no kinks in the hoses
when securing. Avoid the use of metal fasteners
that may be destroyed by corrosion over time.
Step 18 – Hose should be laying flat.
5-18
5.4.6
External Prefilter Assembly (MWF 4300 AWS)
Plumbing parts
not included
Plumbing parts
not included
Figure 5.7 Schematic of External Prefilter Assembly
The MAYTAG External Prefilter assembly will be shipped complete with all
of the following components:
•
•
•
•
External prefilter assembly (head and housing);
protective latex gloves;
filter wall bracket; and
mounting screws and anchors.
5-19
5.4.6.1 Installing the External Prefilter (Model MWF 4300 AWS)
To reduce the risk of severe injury, illness, death and/or property damage, read and follow all
instructions. Use only MAYTAG authorized parts, where required, to repair and service the MAYTAG
Whole Home Water Filtration System.
Inlet Valve
Inlet Valve
Bypass
Valve
Outlet Valve
Outlet Valve
Step 1 – Ensure the household water inlet, new
inlet, outlet and bypass valves are closed. Remove
the External Prefilter fro m the plastic bag.
Step 2 – Assemble the External Prefilter Head and
mount on the wall. Complete required plumbing.
Step 3 – Insert External Prefilter Cartridge into
External Prefilter Housing.
Step 4 – Attach the External Prefilter Housing to
the External Prefilter Housing Head by tightening
connection using the External Prefilter Wrench.
Failure to install the External Prefilter during installation or after maintenance activities will allow larger
particles to enter the System and may lead to premature fouling and possibly fibre damage.
5.4.7
•
•
MWF 4100 AWS, MWF 4200 AWS Controller (Base Controller)
Use with low turbidity waters, <0.5NTU, usually pretreated municipal water.
Has one output terminal and controls only the drain solenoid valve.
5-20
5.4.7.1 Attaching Base Controller to Wall
Step 1 – Determine the location where the
controller will be mounted. Ensure that the
location will allow for the controller to be plugged
in to the power outlet and connected to the
automatic drain valve.
Step 3 – Ensure the controller is level.
Step 2 - Drill a single central hole into the wall to
insert a screw protruding ¼” and hang the controller
on the back screw support.
Step 4 – Mount controller to the wall from the front
of the controller using the other two provided
screws and plugs.
It is strongly recommended that the controller be placed in a location that is inaccessible to young
children.
5-21
Figure 5.8 Base Controller Schematic Diagram
5.4.7.2 Connect Base Controller to Solenoid Valve
Step 1 – Ensure the transformer is not plugged in.
Connect the solenoid plug wire to the two valve
screw terminals on the right on the base controller.
Step 2 – Connect the power supply cable from the
transformer to the two 24 VAC screw terminals on
the left on the base controller.
Do not splice the transformer adaptor unless it is performed in agreement with the local electrical code.
Improper splicing may lead to electrical shock if improper connection is exposed to water. Personal
injury and/or physical damage may result.
5-22
Step 3 - Secure the System electrical wires neatly
using tie-wraps
5.4.7.3 Plug in and set Base Controller
Step 1 – Attach solenoid valve to the solenoid
plug, paying close attention to the orientation of
the prongs. Ensure that the gasket is installed
between the plug and adapter valve.
Step 2 – Secure the solenoid plug to the solenoid
by tightening using a standard screwdriver.
Ensure that a flat gasket is installed between the plug adaptor and valve. Failure to install will increase
the risk of shock if electrical connection comes into contact with water. Personal injury and/or property
damage may result.
Step 3 – Install two AA batteries supplied with
the controller. Replace battery cover.
Step 4 – Connect power supply cord to the wall
outlet.
5-23
Do not use extension cords to hook transformer to power source. Doing so will increase the
risk of electrical shocking if the wiring is exposed to water. Personal injury and/or property
damage may result.
Step 5 – Set up the controller using the procedure outlined below.
5
1
1.
2
MODES: use next button (1) to toggle through
the modes.
MANUAL FLUSH: press next (1) until
manual is flashing. Press manual flush (5)
and hold. If held longer than 10 seconds, drain
solenid remains open. Toggle solenoid closed
by pressing manual flush (5) once.
SETTING TIME OF DAY: press next (1)
until set time appears. Press enter (2). Use
up/down arrows (3, 4) to set time of day. Press
enter (2) to set.
SET TIME OF FLUSH: press next (1) until
start time appears. Press enter (2). Use
up/down arrows (3, 4) to set time of flush.
Press enter (2) to set.
SETTING PROGRAM CHOICE: press next
(1) until program appears. Press enter (2).
Use up/down arrows (3, 4) to select program
choice. Press enter (2) to set.
2.
3.
4.
3
4
5.
See Table 5.2 for Base Controller Programming
Choices
Table 5.2 MWF 4100 AWS and MWF 4200 AWS Controller Program Selection
Base Controller – MWF 4100 AWS and MWF 4200 AWS Controller Program Settings
ControllerProgram
Base-Prg 1
Recommen
ded
household
occupancy
(persons)
Up to 4
Source
water
turbidity*
*
(NTU)
<0.5
Base-Prg 2
Up to 4
Base-Prg 3
Up to 6
<0.5Peaks
to 1.0NTU,
<5% of
time
<0.5 Peaks
to 1.0NTU,
<5% of
time
Daily household
water
consumption
No.
Flushes
per
cycle
300Usgal/d
(1135L/d)
300Usgal/d
(1135L/d)
2
No.
tank
drains
per
cycle
--
3
--
400Usgal/d
(1510L/d)
4
--
Flush water
used per day
(flow at
7USGAL/min)
14Usgal/d
(53L/d)
21Usgal/d
(80L/d)
28Usgal/d
(106L/d)
**If turbidity peaks are higher than those listed, consult MAYTAG Technical Assistance at 1-800756-2926
5-24
5.4.8
•
•
MWF 4300 AWS Controller (Advanced Controller)
Use with waters having turbidity up to 5.0NTU, usually rural water installations.
Has two output terminals. Controls both the automated drain solenoid valve and the automated
inlet solenoid valve.
5.4.8.1 Attaching Controller to Wall
Step 1 – Determine the location where the
controller will be mounted.
Ensure that the
location will allow for the controller to be plugged
in to the power outlet and connected to the
automatic inlet and drain valves.
Step 2 – Using a level, draw a line on the wall at
the location where the controller is to be installed.
It is strongly recommended that the controller be placed in a location that is inaccessible to
young children.
Step 3 – Use a measuring tape to mark the
location where the two holes are to be drilled
(ensuring the two holes are 5 ½” apart). Use a
3/16” drill bit to drill the holes
Step 4 – Install the plugs and screws, leaving ¼”
protruding to hang the controller.
Slip the
controller over the screws and slide it to the right to
secure in position.
5-25
Figure 5.9 Advanced Controller Schematic Diagram
5.4.8.2 Connect Controller to Solenoid Valve
Be sure the controller is unplugged prior to removing the back cover to avoid electrocution.
Step 1 – Be sure the controller is unplugged.
Slide controller off the wall. Remove the back
cover and screws from the advanced controller.
Step 2 – Insert the inlet solenoid “phone jack”
connector into the inlet socket and the drain
solenoid connector into the drain socket. Be sure
to label each at the end of each lead to avoid
confusion and misconnections.
5-26
DO NOT
USE
DRAIN
INLET
Step 3 – Double check all connections and labels.
Be sure that cords go through the appropriate slot.
Step 4 – Replace back cover, insert screws and
tighten. Slide back into place on wall.
5.4.8.3 Plug in and set Controller
To reduce the risk of severe injury, illness, death and/or property damage, read and follow all
instructions, use only MAYTAG Whole Home Water Filtration System replacement parts.
Step 1 – Attach the normally closed solenoid
valve to the drain solenoid plug paying close
attention to the orientation of the prongs ensure
that the gasket is installed between the plug and
adapter valve.
Step 2 – Secure the solenoid plug to the solenoid
valve by tightening using a standard screwdriver.
Step 3 – Attach the normally opened solenoid
valve to the inlet solenoid plug paying close
attention to the orientation of the prongs. Ensure
that the gasket is installed between the plug and
the adapter valve.
Step 4 – Secure the solenoid plug to the solenoid
by tightening using a standard screwdriver.
5-27
Ensure that a flat gasket is installed between the plug adaptor and valve. Failure to install will increase
the risk of shock if electrical connection comes into contact with water. Personal injury and/or property
damage may result.
1
Step 5 – Connect power supply cord to the wall
socket.
Setting Time of Day
Setting Flush Time
2
3
4
Step 6 – Set up the controller following the
described procedure:
1. Press and hold the ‘Mode’ button until the display begins to flash.
Press the ’Mode’ button five more times until the colon, separating the hour
and minute designation, begins to flash. The LCD display shows the current
hour setting in combination with one of the following; (HH: A) indicates AM,
(HH: P) indicates PM and (HH: H) indicates 24-hour clock format.
3. Press the ‘Set’ button until the desired hour is reached. Note: You can choose
between the 12-hour format and 24-hour format by passing midnight.
4. Press the ‘Mode’ button to have the minutes ( :MM) appear.
5. Press the ‘Set’ button until the desired minute is reached.
6. Press the ‘Mode’ button to have the Controller show the programmed time.
7. Press the ‘Set’ button to return the Controller to Time mode. The colon
separating the hour and minute designations flashes to indicate ‘in service’
operation.
Note 1: If 1 minute has elapsed while setting the time and no buttons have been pressed,
you must press the Mode button for 6 seconds so that the Controller can be advanced to the
next setting.
Note 2: This device is pre-programmed to receive month and day settings. These settings
will appear as you move through settings as described above however it is not necessary to
set month and day as these are not utilized in current versions of the Advanced Controller.
2.
1.
Press and hold the ‘Mode’ button until Flush Time begins to flash (HH:MM).
A non-flashing colon separating the hour and minute designations verifies this.
2. Press the ‘Mode’ button once. The LCD display shows the current flush hour
setting in combination with one of the following: (HH: A) indicates AM,
(HH: P) indicates PM and (HH: H) indicates 24-hour clock format.
3. Press the ‘Set’ button until the desired hour is reached.
4. Press the ‘Mode’ button. The minutes ( :MM) begin to flash.
5. Press the ‘Set’ button until the desired flush time minute is reached.
6. Press the ‘Mode’ button to have the Controller return to Time Mode.
Note: If 1 minute has elapsed while setting the time and no buttons have been pressed, you
must press the Mode button for 6 seconds so that the Controller can be advanced to the
next setting.
5-28
Activating the Flush
Sequence
•
MUST be active
when System is in
service
Selecting Program
Choice
•
•
Selected program
may include a
System drain
function, but System
must be able to drain
by gravity to
accomplish System
drain.
See Table 6 for
programming
choices
**Important Note** – A wave symbol above the colon in Time mode indicates that the
automatic daily flush sequence is activated. It is essential that the flush sequence be
activated while the System is in operation.
1. Press and hold the Mode button until the Flush Time begins to flash (HH:MM). A
non-flashing colon separating the hour and minute designations verifies this.
2. Press the Set button until the wave symbol appears above the colon. The wave
indicates the automatic daily flush sequence is now activated.
3. Press the Mode button three times to have the Controller return to the Time mode.
The Controller automatic flush sequence is now activated.
Note: If 1 minute has elapsed while setting the time and no buttons have been pressed;
press the Mode button for 6 seconds so that the Controller can be advanced to the next
setting.
1.
2.
3.
Press and hold the ‘Flush’ button and ‘Integrity’ button together for 6 seconds.
The “flush” LED will begins to flash. The number of flashes indicates the
program that is currently selected.
To toggle between the different programs, use the following keystroke sequence:
press the ‘Flush’ button repeatedly to toggle from Program #1 to Program #6.
Program selection can be verified by counting the number of LED flashes after
pressing the ‘Flush’ button.
Once the program has been selected, the Controller should be allowed to stand
idle for one minute after the last keystroke. The program will be automatically
saved. The program selection can be verified by repeating step 1.
See Table 5.3 for Advanced Controller Program Choices
Do not use extension cords to hook transformer to power source. Doing so will increase the
risk of electrical shocking if the wiring is exposed to water. Personal injury and/or property
damage may result.
Note that during Advance Controller Program 4 and 5 flushing, household water will be ‘off’ for a 10minute period during the tank drain portion of the cycle.
5-29
Table 5.3 MWF 4300 AWS Controller Program Selection
Advanced Controller – MWF 4300 AWS Controller Program Settings
ControllerProgram
Adv.– Prg 1
Recommen
ded
household
occupancy
(persons)
Up to 4
(Raw)
Source
water
turbidity**
(NTU)
<0.5
Adv.– Prg 2
Up to 4
Adv.– Prg 3
Up to 6
<0.5
Peaks to
1.0NTU,
<5% of time
<0.5
Peaks to
1.0NTU,
<5% of time
Adv.– Prg 4
Up to 4
Daily household
water
consumption
No.
Flushes
per
cycle
300Usgal/d
(1135L/d)
300Usgal/d
(1135L/d)
2
No.
tank
drains
per
cycle
--
3
--
400Usgal/d
(1510L/d)
4
--
Flush water
used per day
(flow at
7USGAL/min)
14Usgal/d
(53L/d)
21Usgal/d
(80L/d)
28Usgal/d
(106L/d)
<1.0
300Usgal/d
2
1
13Usgal/d
Peaks to
(1135L/d)
(49L/d)
5.0NTU,
<5% of time
Adv.– Prg 5
Up to 6
<5.0
400Usgal/d
2
2
18Usgal/d
Peaks to
(1510L/d)
(68L/d)
10.0NTU,
<5% of time
**If turbidity peaks are higher than those listed, consult MAYTAG Technical Assistance 1-800756-2926
5.5
Commissioning
The MAYTAG Whole Home Water Filtration System must be filled with water at all times after
installation. Failure to do so may cause System to dry and become damaged, which may lead to personal
injury, and/or physical damage.
5.5.1
Check for Pressure
Always check the System pressure before removing any components from the System. Never remove
System parts while under pressure.
5-30
Test port
cap
Step 1 – Test the System for pressure by
removing the test port cap.
5.5.2
Step 2 – Insert the pressure gauge into both inlet
and outlet test ports to ensure that the System is at
zero pressure. Tighten locking nut. Failure to do so
may result in false results
Remove Cap and Internal Prefilter Bag
Step 1 – Using the cap wrench, carefully remove
the cap from the System.
Step 2 – Wearing the supplied protective gloves,
remove the internal prefilter bag containing either a
Carbon Prefilter or Stainless Steel Prefilter from
the System and set aside.
Step 3 – Replace the cap, using the provided cap
wrench to tighten it.
5-31
If not properly tightened and/or the o-ring is not properly examined and cleaned, System leaks may
occur. System leaks may cause personal injury or physical damage.
If the Stainless Steel Prefilter (MWF 4200 AWS or MWF 4300 AWS) fails or becomes damaged, large
sharp particles may enter the MAYTAG Whole Home Water Filtration System. This may cause
premature fouling and/or damage to the System Fibre. A damaged System Fibre may lead to
contaminated water entering the household distribution system. Illness and/or death may occur from
consumption of contaminated water.
5.5.3
Filling and Flushing the System for 15 minutes (after the External Prefilter
Assembly Installation if included)
The System requires a 15 minute flush after the initial installation to ensure that all of the factory
preservative has been removed.
Fill the System slowly and watch for leaks to avoid excessive water dripping onto the floor.
Do not use hot water during commissioning or maintenance of the System. It is possible that if a hot
water tap is used, high levels of factory preservative, chlorine or MAYTAG MC1 Cleaning Solution will
enter the hot water tank and cause personal injury, illness and/or death.
Ensure that all System connections have been made before starting this step. If connections are not
made, leaks may occur causing cross-contamination, personal injury and/or physical damage. Drinking
contaminated water may cause illness and/or death.
Inlet Valve
Inlet Valve
Bypass
Valve
Outlet Valve
Outlet Valve
Step 1 – Ensure that the outlet valve is closed.
Ensure that the bypass valve is closed (if installed).
Turn on the house water supply and inspect for
leaks. Once no leaks are detected, slowly open the
inlet valve half way to begin filling.
Step 2 – If an External Prefilter is installed, press
the red button on the prefilter head to allow air to
escape during filling until no air is heard
escaping.
5-32
Advanced
Controller
Step 3 – As the System begins to fill with water, air
will be heard escaping from the Air vent. When the
System is full, no more air will escape. Inspect for
leaks as the System fills. If a leak appears, close the
inlet valve and repair the leak. When no further air
exits the System, open the inlet and outlet valves
completely. Leave the bypass valve closed (if
installed).
Base Controller
Step 4 – Using the controller, initiate two one
minute flush sequences. See section 5.4.7.3 for
the Base Controller and 5.4.8.3 for the Advanced
Controller.
Step 5 – Open a nearby downstream water valve
and run to drain for 15 minutes with COLD water.
This step is done to remove the factory preservative
from the System.
5.5.4
Integrity Test
PURPOSE: This test ensures that the membranes are intact and free from tears and ruptures that would
permit bacteria and other particles to pass the membranes, contaminating the filtered water. The Integrity
Test is conducted at initial start-up after the initial 15 minute flush and afterwards on an annual basis.
TOOLS REQUIRED:
o 9/16” wrench
o 1/8” standard screwdriver
o Integrity Tester
o Cap Wrench
o Pressure Gauge
Description: This automated test will pressurize the membranes with air from the outlet side of the System,
forcing clean water back through the membranes in the reverse direction. Water easily passes through the
5-33
membranes but due to surface tension of water at the membrane pores, air does not normally pass an intact
membrane. Once all the water has been evacuated and air only remains, an automatic air valve closes and a
pressure sensor measures any change in air pressure over a five-minute interval. If the pressure change over
this interval is minimal, the membrane is intact and the Integrity Tester will indicate a ‘PASS’.
Do not allow electrical connections to come in contact with water.
The Integrity Tester must be on the floor for the test to be accurate.
Inlet Valve
Inlet Valve
Advanced
Controller
Base Controller
Bypass
Valve
Outlet Valve
Outlet Valve
Step 1. Close inlet and outlet valves. (Bypass
valve will also be closed.)
Step 2. Partially drain System using the controller.
Refer to section 5.4.7.3 Step 5 for the Base
Controller and section 5.4.8.3 Step 5 for the
Advanced Controller. Use a pressure gauge to
ensure no pressure is in System.
If the System begins to leak as the cap is removed, tighten the cap, drain more water from the
System (see Step 2 and ensure the inlet and outlet valves are closed) and then attempt to remove
the cap.
Step 3. Remove cap using the cap wrench. (Use
pressure gauges to ensure there is no pressure in
the System first, refer to section 5.5.1).
Step 4 – Adjust the water level to 2” above the
bottom of the prefilter cavity. To raise the water
level, use the inlet valve. To lower the water level
use the flush function on the controller – refer to
section 5.4.7.3 for base controller and 5.4.8.3 for
advanced controller. The water level must be
above the hole in the centre of the prefilter cavity.
5-34
If the Integrity Tester is plugged in and the Integrity Tester solenoid cable is connected to the
drain solenoid valve, the flush button on the Integrity Tester may be used for lowering the water
level.
Screwdri ver
Step 5 – Remove solenoid cable from drain valve
and attach solenoid cable from Integrity Tester to
the drain valve.
Step 6 – Connect Integrity Tester to power source.
John
Guest
valve is
open.
Integrity light
Step 7 – Reset by holding “Integrity test” 8-30
seconds until “integrity” green light is off. Release
immediately.
Step 8 – Calibrate the Integrity Tester by first
ensuring the John Guest valve is open and not
connected. (There should be no water in the
Integrity Tester hose and connections before use.)
Then hold the “Integrity test” button down until
the orange light turns green and the green light
goes out. CONTINUE to hold the button down
another 20 seconds until the green light flashes
momentarily.
Then release the button
immediately. If there is difficulty with this step,
go to Step 7.
5-35
Use wrench
to hold here.
Tighten
here.
Step 9 – Insert the needle into the outlet test port
Step 10 – Hold the “Integrity test” button until the
ensuring the John Guest valve is open. The test port orange button turns green and let go. The drain will
connection must be tightened with a wrench.
open if there is too much water. If an error light
shows, make the appropriate correction as per Step
11 and go to Step 7 (and skip steps 8 and 9). If the
test is working properly, the compressor will be
heard as it tests the System.
If the Integrity Test fails and the compressor has been on, the test should be repeated to ensure all
steps were followed properly. Be sure that all connections are tight, ie. test ports, tees, nipples,
etc. before repeating the test. Prior to repeating the test; put the cap on, open the inlet and outlet
valves and turn a tap on for 10 minutes. This will remove the pressure built up in the System by
the Integrity Tester. Start again from Step 1.
Step 11 – The “integrity test” green light will be lit. Wait 5 minutes. Interpret the results from the
integrity indicator light.
Flashes
(continuous green light)
Action
PASS
(continuous red light)
FAIL – Check for leaks. Tighten all
connections and retest System. System may
require replacement.
Drain some of the water and return to Step 7.
(green light)
(green light)
Add some water (by opening the inlet).
Return to Step 7.
(green light)
(green light)
Check for air leaks. Check outlet valve is
closed. Return to Step 1. System may require
replacement.
Check for large air leaks. Check outlet valve
is closed. Return to Step 1. System may
require replacement.
5.5.4.1 Troubleshooting Guide for Integrity Tester
Problem/Situation
Fault or failure at end of test.
“Integrity test” button released too
quickly or too late.
Correction/Action
Check all connections. Tighten needle connection to test port.
Repeat test from the first step.
Begin the test again from the first step.
5-36
Problem/Situation
After the test the tap does not work
properly.
Water is leaking from the System
when cap is removed.
Controller does not zero properly.
Can not remove the cap.
Integrity tester is hooked up to drain
solenoid and System needs to be
drained.
Correction/Action
Be sure the inlet and outlet valves were reopened. Leave the tap
on for a few minutes to allow water flow to return to normal.
Tighten the cap again to prevent more water from leaking. Drain
the System further by pushing the flush button on the controller.
Then remove the cap.
Open the John Guest valve.
Be sure the inlet valve is closed. Drain the System.
Be sure the inlet valve is closed. Hold down the flush button on
the Integrity tester for approximately 20 seconds to drain the
System. Drain solenoid will open for the duration that the button
is held down.
NOTE: If there is a failure, most of the time it is due to a System leak from hoses, connections or
valves. Be sure to; replace the cap, turn on inlet valve half way to minimize air in the System,
after air has escaped through air vent turn on outlet valve, and run tap for a few minutes to
release pressure prior to repeating the test.
5.5.5
Sanitize System
During this procedure, DO NOT open the Bypass Valves, as this will allow potentially contaminated
water into the household distribution system. Contaminated water may lead to personal injury and/or
death.
Chlorine bleach must be in the house for less than 3 months. The active percentage reduces with time.
This does not disinfect all of the household pipes. If on a lake or well, it is strongly recommended that
all of the pipes are sanitized as water will be previously microbially unsafe
NOTE: Water level prior to pouring chlorine bleach into the System should still be at 2” above the
bottom of the prefilter cavity from the Integrity test. This is very important so as not to damage
the System. If the water level is too low, open the inlet valve slowly for about 30 seconds to raise
the water level.
Advanced
Controller
Step 1- With the System Cap off (and internal
prefilter still removed), ensure the water level in
the internal prefilter cavity is well above the
internal prefilter spigot. Pour in 250mL of 12%
chlorine bleach OR 500mL of 5% or 6%
household chlorine bleach into the top of the
System. Let stand 15 minutes.
Base Controller
Step 2 – Use the controller to activate the drain
solenoid in order to drain the System. See section
5.4.7.3 for base controller and 5.4.8.3 for advanced
controller.
5-37
Inlet Valve
Inlet Valve
Bypass
Valve
Outlet Valve
Step 4 – Refill the System by opening the inlet and
outlet valves, and ensuring the bypass valve remains
closed (if installed). Note that the System still
requires further flushing to remove the bleach. This
will be completed in the Final Flushing (section
5.5.6.2).
Step 3 – Remove the internal prefilter from the
bag and install the internal prefilter cartridge
(Carbon Prefilter for MWF 4100 AWS and
Stainless Steel Prefilter for the MWF 4200
AWS and MWF 4300 AWS) into the internal
prefilter cavity, ensuring that the prefilter spigot
is sitting evenly in the prefilter cavity. Replace
the System Cap.
5.5.6
Outlet Valve
Trans Membrane Pressure (TMP) Test
Step 1 - Remove inlet and outlet test port caps.
Insert a pressure gauge in each. Ensure the two
gauges are fitted with Teflon tape before use.
Step 2 - Turn on a tap near the System with a high
water flow rate.
Results of Trans Membrane Pressure Test
Situation
System TMP is less than 10 psi
System TMP is between 10 psi and 15 psi.
Action
Regular Maintenance Schedule
Tell the homeowner that the System is fouled and
indicate that a return visit may be required in the
near future if it is not replaced.
Ensure that the System Prefilter does not cause the
pressure drop.
System Fouling Rate is/will surpass the 15-psi
Accelerated Maintenance schedule.
Tell the homeowner that this is the case and a visit
5-38
limit before the next scheduled Maintenance Visit.
prior to the next yearly visit may be required.
Ensure that the System Prefilter does not cause the
pressure drop.
System TMP is greater than 15 psi
Accelerated Maintenance schedule.
Replace System.
Step 3. Read the two pressures and subtract the smaller value from the larger value. Refer to the table for
appropriate action. For well, cistern and surface water supplies with a pump/pressure tank system, take the
outlet pressure only when the inlet pressure reads the following:
Pressure
Range (psi)
20/40
30/50
40/60
X/Y
Inlet pressure for TMP
determination (psi)
35
45
55
Y-5
5.5.6.1 Complete Paperwork
Step 1 – Complete the warranty card ensuring that all information is provided.
Figure 5.10 Example of MAYTAG warranty card.
Step 2 – Complete the installation checklist and ensure that all fields are complete.
Installation Checklist
Module secured to floor with height clearance available to remove pre-filter. (fig 4.3 pg 4-5
and section 5.4.5 step 1&2 pg 5-13)
Drain line hose is secured with no kinks. (section 5.4.5 steps 16-18 pg 5-18)
Backpulse tank at correct pressure.(table 5.1 pg 5-13)
Module cap and air vent secure.(last cap replacement sec 5.5.5 step 3 pg 5-38 and section 5.4.3
step 4 pg 5-11)
Air vent has black cap open 1 ½ turns and red cap closed.(section 5.4.3 step 4 pg 5-11)
Inlet and outlet valves are open, no leaks with plumbing, by-pass is closed.
All piping connections are snug, no leaks.
5-39
Controller is mounted to wall, connected, batteries installed and programmed. (section 5.4.7 pg
5-20 or 5.4.8 pg 5-25)
Flush time is set for 3 am local time (section 5.4.7.3 step 5 pg 5-23 or 5.4.8.3 step 5 pg 5-27)
Appropriate pre-filter is in prefilter cavity (carbon or stainless steel).
MWF 4300 AWS has external prefilter installed.(section 5.4.6.1 pg 5-20)
System has been flushed for 15 minutes. (section 5.5.3 pg 5-32)
System has been tested for integrity. (section 5.5.4 pg 5-33)
System has been sanitized (soaked with chlorine for 15 minutes). (section 5.5.5 pg 5-37)
Trans Membrane Pressure test has been done. (section 5.5.6 pg 5-38)
Paperwork has been completed;
Warranty card
This checklist with your signature and Post-Installation Homeowner checklist with
your signature and homeowner signature
Model number on owners manual
Service tag
Homeowner aware of need to flush for 1 hour.
Step 3 – Complete Post-Installation Homeowner Checklist to ensure the homeowner understands the
MAYTAG Water Filtration System.
Post-Installation Homeowner Checklist
Basic System Operation
Normal Noises:
• Air vent releasing air (hissing), particularly MWF4300AWS
• Daily automatic cleaning during night.
Possible low water pressure during daily automatic cleaning, temporary
Inlet, Outlet, By-pass (operation if applicable)
Controller Settings
Temperature and Wetting Requirements
Maintenance Requirements:
Annual (Recommended every 6 mths for surface
Replacement of carbon (and external
waters)
prefilter if applicable)
Clean membrane (chlorine bleach for
municipal and ground water and
MAYTAG MC1 Cleaning solution for
surface waters)
Perform integrity test
Perform trans membrane pressure test
(TMP)
If applicable
Winterization (Before and After)
Flushing requirements (1 hr) & expectations over first few days
Step 4 – Record the model number on page 2 of the Owner’s Manual for future reference.
5-40
Step 5 – Complete the service tag ensuring that all fields are complete.
Figure 5.11 Example of the MAYTAG service tag.
5.5.6.2 Final Flushing By Homeowner
Step 1 – Have the homeowner flush the System with cold water for 60 minutes by opening a bathtub faucet
and allowing the water to run down the drain. The 60 minute flush is required to meet NSF drinking water
requirements.
5.5.7
Cleaning the Stainless Steel
The stainless steel surface of your MAYTAG Whole Home Water Filtration System requires no special
maintenance. If required, the surface may be cleaned using a mild soap solution. Do not use any other
cleaners or abrasive materials on the stainless steel surface as these cleaners may damage the label. Wipe
System dry with a soft cloth afterward.
5-41
6 Maintenance
6.1
Maintenance Schedule
A MAYTAG Services Qualified Service Technician must perform all maintenance on the MAYTAG
Whole Home Water Filtration System. An annual integrity test must be performed which is required as
part of the 5 year limited prorated membrane warranty.
If the MAYTAG Services Qualified Service Technician determines that System has a high degree of
debris causing a reduction in System flowrate, the number of visits per year may be increased by
MAYTAG to ensure that the System stays within operational limitations set by the MAYTAG Whole
Home Water Filtration System and to ensure the limited warranty protection remains in effect.
The Table below outlines the maintenance schedule that should be followed for each Model of the
MAYTAG Whole Home Water Filtration System.
Model MWF 4200 AWS
Model MWF 4100 AWS
MAYTAG Whole Home Water Filtration System Maintenance Schedule
Required Service
MAYTAG Part
No.
Carbon Prefilter
67500001
System cleaning
--
Clean
Integrity testing*
--
Test
Backpulse Tank air
pressure
67500013
Adjust air pressure as
required**
Test
Base Controller
batteries: 2 AA
--
Check timer and program
settings
Replace
Stainless Steel
Prefilter
67500002
Water sources having
significant sediment will
require more frequent
cleaning.
Clean
System cleaning
--
Clean
Integrity testing*
--
Test
Backpulse Tank air
pressure
67500013
Comments
Every 12 Mo.
Water sources with high
levels of particulate, usage
and/or chlorine will require
more frequent changes.
Replace
Adjust air pressure as
required**
Test
Base Controller
Check timer and program
-Replace
batteries: 2 AA
settings
*MAYTAG Services Qualified Service Technician must conduct an Integrity Test annually in
order to validate the limited warranty.
**BP tank pressure setpoint is recorded on page 2 of Owner’s Manual
6-1
MAYTAG Whole Home Water Filtration System Maintenance Schedule (cont.)
Model MWF 4300 AWS
Required
service
Every 6 Mo.
Every 12
Mo.
Part No.
Comments
Stainless Steel
Prefilter
67500002
Water sources with
high levels of
particulate will
require more
frequent cleaning.
System cleaning
--
Clean
Integrity testing*
--
Test
System
67500007
Backpulse Tank
air pressure
67500013
Adjust air pressure
as required**
External Pre-filter
cartridge
67500004
Highly variable
service rate, due to
variability in raw
water quality.
Clean or
replace
Advanced
Controller
battery: 1 AA
--
Check timer and
program settings
Check
Clean
Test
*MAYTAG Services Qualified Service Technician must conduct an Integrity Test annually in
order to validate the limited warranty.
**BP tank pressure setpoint is recorded on page 2 of Owner’s Manual
6-2
6.2
Winterization Procedure
All service and maintenance is to be performed by a MAYTAG Services Qualified Service Technician.
Some of the necessary tools required are available for purchase from MAYTAG. If the Stainless Steel
Prefilter requires cleaning, you may want to collect enough water in a suitable container from a tap for
cleaning the Stainless Steel Prefilter prior to beginning this procedure. All water in the house will be shut
off for the duration of this procedure. Be sure to wear clean waterproof gloves during this procedure and to
read through the procedure first before beginning.
Never use any AUTOMOTIVE type antifreezes when winterizing drinking systems. This may result in
serious injury or death.
The use of cheaper ‘non-propylene glycol based’ plumbing or RV antifreezes may damage the System’s
internal components voiding all warranties. Antifreeze used must be plumbing antifreeze, rated for –50
o
C (-58 F), consisting primarily of propylene glycol and must not contain any ethanol or alcohols.
Propylene glycol (preservative) will provide protection of the System against freezing down to –40 o C (40 F) as long as the proportion of preservative to water is correct. The amount and concentration of the
preservative solution has been selected to take into account water that is not easily drained from the
System. This procedure only protects the MAYTAG Whole Home Water Filtration System from
freezing and does not protect the rest of the household distribution system.
Do not use hot water during commissioning or maintenance of the System. It is possible that if a hot
water tap is used, high levels of factory preservative, chlorine or MAYTAG MC1 Cleaning Solution will
enter the hot water tank and may cause personal injury, illness and/or death. It is recommended to close
the hot water tank inlet valve during commissioning or maintenance of the System and to reopen the hot
water tank inlet valve at the end of the procedure.
When filling the System, fill the System slowly and watch for leaks to avoid excessive water dripping
onto floor.
During this procedure, DO NOT open the Bypass Valve, as this will allow potentially contaminated
water into the household distribution system. Contaminated water may lead to personal injury and/or
death.
Chlorine bleach must be in the house for less than 3 months. The active percentage reduces with time.
This procedure does not disinfect all of the household pipes. It is strongly recommended that all of the
pipes are sanitized as water left in pipes may be microbially unsafe.
When treating surface water sources, a maximum prefilter mesh size of 30 micron is required. Failure to
provide this level of prefiltration may lead to System damage. A damaged System will not perform
effectively, endangering the homeowner or occupant through possible serious personal injury and/or
death.
Do NOT allow the preservative (plumbing antifreeze) to drain onto the ground, into a septic bed, storm
sewer or any body of water. Check the plumbing antifeeze manufacturers directions and warnings for
more information.
Inlet Valve
Bypass
Valve
Inlet Valve
6-3
Step 1 - Close the inlet ball valve. If a bypass
valve is installed, the bypass valve must remain
closed.
Step 2 - Completely drain the System and
household piping. To drain the System use the
controller and refer to procedure 5.4.7.3 for use of
the Base Controller and procedure 5.4.8.3 for use of
the Advanced Controller and flush to drain for 5
minutes. To begin draining the household pipes,
turn on a nearby cold water tap and leave it on until
the tap only drips. Turn off the tap.
Disconnect here.
Step 3. Remove the drain hose from the drain
valve and insert a ¾” MNPT Hex PVC plug
(available at most hardware stores) to avoid
preservative from leaking. Remove hose clamp
on drain hose and remove elbow.
Step 4 - Drain the pipes by disconnecting the outlet
pipe on the side of the stainless steel flex hose
furthest from the System. Drain into bucket for at
least 10 minutes.
6-4
Step 5 - Close the outlet ball valve. Plug the
disconnected outlet pipe on the System side with
a ¾” MNPT Hex PVC plug at the end of the
Stainless Steel flexhose.
Step 6 - If using an External Prefilter, drain the
External Prefilter Housing (refer to section 6.3.2.3),
remove the External Prefilter Cartridge and discard
the External Prefilter Cartridge.
Replace the
External Prefilter Housing without an External
Prefilter Cartridge and close the valve on the
bottom of the External Prefilter Housing.
Step 7 – Use pressure gauges to ensure there is no
System pressure. Remove System Cap using the
Cap Wrench.
Step 8 - Remove Stainless Steel Prefilter (Models
MWF4200AWS and MWF4300AWS) or Carbon
Prefilter (Model MWF4100AWS). If using a
Carbon Prefilter, discard the Carbon Prefilter. If
using a Stainless Steel Prefilter, clean and set aside
the Stainless Steel Prefilter.
6-5
Step 9 - Fill the System with approximately 16
litres (4 US gallons) of –50 o C (-58 F) propylene
glycol based plumbing antifreeze to 2” above the
bottom of the prefilter cavity. Propylene glycol
antifreeze is available at most hardware or
department type retail stores.
Step 10 - Unplug the outlet pipe on the System side
to “open the outlet” by removing the ¾” PVC plug.
Remove approximately 4 litres (1 US gallon) from
the System into an empty propylene glycol based
container. Close the outlet pipe by replugging the
outlet pipe with the ¾” PVC plug. Discard the
collected fluid in accordance with the
manufacturers directions and save the container.
Step 11 - Save all empty antifreeze containers for
the spring.
Step 12 - If using a Stainless Steel Prefilter, replace
the Stainless Steel Prefilter.
Step 13 - Replace the System Cap using the Cap
Wrench.
Step 14 - Check drain plug and outlet plug are
closed snug. Make sure there are no leaks. System
is ready for the winter.
6-6
Note: Preservative will provide protection against freezing down to –40°C as long as the proportion of
propylene glycol to water is correct. The amount and concentration of the propylene glycol solution has
been selected to take into account water that is not easily drained from the System. This procedure does
not protect the rest of the house from freezing, it only provides necessary precautions for the MAYTAG
Whole Home Water Filtration System.
6.2.1
Spring Start-up after Winterization
Do NOT allow the preservative (plumbing antifreeze) to drain onto the ground, into a septic bed, storm
sewer or any body of water. Check the plumbing antifreeze manufacturers directions and warnings for
more information.
Step 1 - Drain propylene glycol solution from the
System by removing the outlet plug. Drain into the
saved antifreeze containers.
Step 2 - Dispose of the propylene glycol solution in
accordance with the manufacturers directions.
Step 3 - Remove drain plug from drain valve.
Step 4 - Reconnect drain and outlet piping. (Refer
to piping diagrams in Section 10.2 if necessary.)
Ensure connections are snug and hose clamp on
drain hose is snug. Ensure there are no kinks in the
drain hose.
6-7
Inlet Valve
Inlet Valve
Bypass
Valve
Outlet Valve
Outlet Valve
Step 5 - Open the inlet ball valve and fill the
System. Air will escape through the Air Vent on
the System Cap.
Step 6 - Open the outlet ball valve. Open the
closest cold water high demand tap (ie. bathtub
faucet) for 30 minutes.
Advanced
Controller
Base Controller
Step 7 - Open all cold taps one at a time for 1
minute. Flush all toilets once.
Step 8 - Close the inlet ball valve. Partially drain
System using the flush function for 1 minute to
depressurize the System, refer to procedure 5.4.7.3
for use of the Base Controller and procedure 5.4.8.3
for use of the Advanced Controller.
Step 9 – Use pressure gauges to ensure no pressure
is in the System. Remove System Cap using the
Cap Wrench.
Step 10 - If using a Stainless Steel Prefilter, remove
and set aside the Stainless Steel Prefilter in a clean
pail or sink.
6-8
Advanced
Controller
Step 11 - Be sure the water level in the System is
approximately ½ way up the prefilter cavity. Add
more water using the inlet ball valve if necessary.
Add 500 mL of unscented household chlorine
bleach (approximately 5.25% chlorine), minimum 3
months old, to the System.
Base Controller
Step 12 - Allow System to soak for 15 minutes.
Drain System using the controller as in step 8
above.
Note: If the winterization spring start up is combined with the annual maintenance sanitizing/cleaning
procedure, the System must soak for 60 minutes. If the System is on well water, the chlorine must be
substituted with MAYTAG MC1 Cleaning Solution instead of chlorine bleach. Never mix chlorine bleach
with the MAYTAG MC1 Cleaning Solution.
Step 13 - If using a Carbon Prefilter, install a new
Carbon Prefilter. If using a Stainless Steel Prefilter,
reinsert Stainless Steel Prefilter.
6-9
Step 14. Replace the System Cap using the Cap
Wrench.
Inlet Valve
Inlet Valve
Bypass
Valve
Outlet Valve
Step 15 – If using an External Prefilter, drain the
External Prefilter Housing (refer to section 5.4.7),
insert a new External Prefilter Cartridge into the
External Prefilter Housing. Close the External
Prefilter valve.
Outlet Valve
Step 16 – Partially open inlet ball valve slowly and
watch for leaks. The air vent will make a hissing
noise as air escapes, if no noise is heard, open the
small black cap on top of the air vent. Once the
System is full of water, open the inlet ball valve
fully.
Step 17 – Flush to drain for 5 minutes using the
controller (refer to step 8 above). Open the outlet
ball valve. Open a nearby cold water high demand
tap for 30 minutes.
Note: The water may taste slightly different for the first few days but will not be harmful if procedures are
followed. It is recommended that first thing in the morning for the first two days after this procedure is
complete, leave a cold water tap on full for 30 minutes.
6.3
MAYTAG Replacement Procedures
6.3.1
Replacement Parts
Replacement parts used with the MAYTAG Whole Home Water Filtration System
Part Number
67500001
67500002
67500008
67500007
67500010
N/A
Description
Carbon Prefilter
Stainless Steel
Prefilter
8” Neoprene cap O –
Ring
System Replacement
(includes cap, O-ring,
3 poly nipples and
backpulse tank)
Cap Wrench
Owner’s Manual
MWF 4100 AWS
v
MWF 4200 AWS
MWF 4300 AWS
v
v
v
v
v
v
v
v
v
v
v
v
v
v
6-10
67500003
67500004
67500025
67500026
67500005
67500006
67500011
67500012
67500013
67500014
67500015
67500016
67500017
67500018
67500019
67500027
67500020
67500021
67500022
67500009
67500023
67500024
6.3.2
External Prefilter Kit
External Prefilter
Replacement
Cartridge
External Prefilter
Wrench
External Prefilter ORing
Base Controller
Advanced Controller
Cap
Lockring
Backpulse Tank
Base
Inlet or Outlet Pipe
Assembly
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
Drain Pipe Assembly
Installation Sub
Assembly Kit (inlet,
outlet, drain, air vent)
v
v
v
v
Solenoid Valve NC
Solenoid Valve NO
Check valve
Hex Elbow,
¾”Mx5/8” Hose Barb
Air Vent Valve,
automatic float, duo
vent
Integrity Tester
O-Ring Lube – NSF
Certified
Pressure Test Gauge
Assembly
MAYTAG MC1
Cleaning Solution
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v
v (Inlet for
MWF4300AWS
may also require
solenoid N.O.)
v
v (Inlet for
MWF4300AWS
may also require
solenoid N.O.)
v
v
v
Replacement Procedures
There are two situations that require the MAYTAG Whole Home Water Filtration System to be replaced:
Situation #1 - System Fouling - Under conditions of normal use, the System becomes fouled or plugged
with dirt and debris that built up and could not be flushed from the System. System fouling causes the
household water flow and pressure to drop. The homeowner will notice this and request its replacement.
When the System is fouled, bacteria, viruses and parasites will be rejected just as effectively as
when the System is clean.
Situation #2 - Failed Integrity Test – The System may become damaged from misuse, foreign debris, or
other unusual operating circumstances. If this does occur, the Integrity Tester will diagnose this as a
problem and the System will require replacing.
6-11
A damaged System will increase the likelihood that harmful microorganisms will enter the
household distribution system and potentially harm the occupants.
The required replacement component for this procedure, assuming that no other work is required, are as
follows.
Box #
1
Contents
MAYTAG Whole Home Water Filtration System
MAYTAG Part #
67500007
6.3.2.1 Removing Existing System and Installing Replacement System
When loosening the unions, excess water in pipes may leak on the floor or come into contact with the
individual servicing the System. Water may be contaminated causing personal injury or household
damage.
Do not open Bypass Valves because contaminated water may enter household distribution system.
Contaminated water might cause personal injury and in some cases death.
When lying System down on floor, capture excess water using a bucket or rags. Excess water in the
System may leak on the floor or come into contact with an individual. Water may be contaminated
causing personal injury or household damage.
System may be damp and slippery from the preserving process. Be careful not to drop the System when
removing from box. Wiping System with a clean, dry cloth will reduce the likelihood of dropping the
System.
Inlet Valve
Inlet Valve
Bypass
Valve
Outlet Valve
Outlet Valve
Step 1 - Close inlet, outlet and by-pass valves.
Step 2 - Disconnect the drain, inlet and outlet pipe
assembly unions from the System. Channel locks
may be required to perform initial loosening.
6-12
Step 3 - Remove System, insert ¾” plugs from
new System onto old System prior to returning to
MAYTAG.
Step 4 – Label the box appropriately as in the
table below. Call the MAYTAG Technical
Assistance for shipping and handling details at 1800-756-2926.
Label on System Box
Use only if:
FOULED – MAYTAG TECHNICIAN NUMBER
INTEGRITY – MAYTAG TECHNICIAN
NUMBER
DAMAGED – MAYTAG TECHNICIAN
NUMBER
Step 5 – Install replacement System as per the
instructions in section 5.4. Be sure to;
• Disinfect pressure gauges.
• Reuse existing Air Vent, piping assembly
parts, Carbon Prefilter or Stainless Steel
Prefilter, External Prefilter (if applicable)
and Base or Advanced Controller.
6.3.2.2 Installing Replacement O-Ring
Step 1 - Apply NSF approved o-ring grease to the
entire surface of the o-ring (apply grease
sparingly) and insert the o-ring in the o-ring
groove of the System housing.
6-13
If the System is fouled
If the System has failed the Integrity Test.
If the System has been damaged during
transportation, warehousing or installation
steps.
6.3.2.3 Installing External Prefilter Replacement
Inlet Valve
Inlet Valve
Advanced
Controller
Base Controller
Bypass
Valve
Outlet Valve
Outlet Valve
Step 1 - Close the inlet and outlet ball valve.
Turn off the household water. If a bypass valve is
installed, the bypass valve must remain closed.
Step 2 – Release the pressure in the System by
using the controller to drain for 1 minute. Refer to
procedure 5.4.7.3 for use of the Base Controller and
procedure 5.4.8.3 for use of the Advanced
Controller.
Step 3 – Drain the prefilter by removing the valve
plug.
Step 4 – Secure a ¼” hose to the quick connect
fitting and direct the hose into a bucket.
Drain Valve
Step 5 – Open the drain valve to drain the prefilter
completely into the bucket.
Step 6 – For more rapid draining, press on the red
button located on the top of the external prefilter
housing.
6-14
Drain Valve
Step 7 – After the prefilter housing is completely
drained, close the External Prefilter drain valve,
remove the hose, and replace the housing plug.
Step 8 – Separate the prefilter housing from the
prefilter head using the optional prefilter wrench.
Step 9 – Pull the external prefilter cartridge
straight up and out of the external prefilter housing
and drip dry to remove any excess water. Dispose
of any excess water and place the used external
prefilter cartridge in a garbage bag for disposal.
Step 10 – Inspect the o-ring and external prefilter
housing for damage or wear.
6-15
Step 11 – Wipe any debris from the o-ring surface
and inner and outer prefilter housing using a clean
soft cloth.
Step 12 – Insert the new External prefilter into the
external prefilter housing. Ensure that the spigot
of the housing lines up with the Prefilter. Be
careful not to damage the External Prefilter.
Step 13 – Reconnect the prefilter housing to the
prefilter head by turning counter-clockwise. Use
an External Prefilter Wrench to tighten. Open the
inlet and outlet ball valves and turn on the
household water.
6.3.2.4 Installing Internal Prefilter Replacement (Carbon or Stainless Steel)
Simply drain the System, use the pressure gauges to ensure there is no pressure in the System, remove the
cap, remove the existing prefilter and replace with new prefilter. Replace cap and repressurize System.
6.4
Maintenance Cleaning and Sanitizing Procedures
To reduce the risk of severe injury, illness, death and/or property damage, read and follow all
instructions and use only MAYTAG authorized parts and labour to repair and service the MAYTAG
Whole Home Water Filtration System.
During this procedure, DO NOT open the Bypass Valves, as this will allow potentially contaminated
water into the household distribution system. Contaminated water may lead to person injury and in
6-16
serious cases even death.
Chlorine bleach must be less than 3 months old. The active percentage reduces with time.
To avoid sending sanitizing solution into household hot water distribution system, do not turn on hot
water until sanitizing procedure is complete. Sanitizing solution in the water supply may irritate the skin
or cause illness if ingested.
MAYTAG has developed a strategy to ensure sanitary installation and maintenance procedures and to
e xtend the life of the MAYTAG Whole Home Water Filtration System through periodic maintenance
cleaning activities. Two different cleaning solutions have been selected and thoroughly tested to provide
these important System features. One is the MAYTAG MC1 Cleaning Solution and the other is any
standard, unscented household chlorine bleach.
MAYTAG Solution
MAYTAG MC1
Cleaning Solution
6.4.1
Applications
Municipal and Well water maintenance cleaning
MAYTAG Part #
67500024
Integrity Test
An annual integrity test is required in order to validate the System limited warranty.
See section 5.5.4 for the Integrity Test Procedure.
After the integrity test is complete:
Step 1 – Check the backpulse tank pressure using
a digital gauge. See section 5.4.4 for Backpulse
tank pressure guide.
Step 2 – If backpulse tank pressure is not at the
required pressure, use a hand pump or compressor
to pressurize the tank to the required pressure. See
Section 5.4.4.
6-17
Step 3 – Unplug the Integrity Tester from the
power source.
Step 4 – Remove the test needle from the System.
Inlet Valve
Test Port
Cap
Inlet Valve
Bypass
Valve
Outlet Valve
Step 5 – Replace the test port cap.
Advanced
Controller
Outlet Valve
Step 6 – De-pressurize the System by ensuring the
inlet and outlet valves are closed.
Inlet Valve
Base Controller
Inlet Valve
Bypass
Valve
Outlet Valve
Step 7 – Using the controller, drain the System to
let the air pressure out. See section 5.4.7.3 for
Base Controller and section 5.4.8.3 for the
Advanced Controller.
6.4.2
Outlet Valve
Step 8 – Fill the System again with water by
opening the inlet and outlet valves.
Sanitizing Procedure (for MWF4100AWS and MWF4300AWS)
NOTE: If System drain hose has been installed above drain outlet, the manual drain
valve, located on the System’s clean water pipe assembly, may be required to provide
adequate System draining prior to removing the System Cap.
6-18
Inlet Valve
Inlet Valve
Advanced
Controller
Base Controller
Bypass
Valve
Outlet Valve
Outlet Valve
Step 1 – Isolate the MAYTAG Whole Home
Water Filtration System by closing the inlet and
outlet valves. The entire house without water
during this time.
Step 2 – Drain the System using the controller.
See section 5.4.7.3 for the base controller and
section 5.4.8.3 for the advanced controller
Step 3 – Wearing protective gloves, remove the
System Cap, using the Cap Wrench. Turn the
wrench in a counter-clockwise direction to loosen
it. (Use pressure gauges to ensure no System
pressure first.)
Step 4 – Wipe out the inside of the cap with a
clean, soft cloth and place on a clean surface.
Step 5 - Inspect the o-ring on the System for
damage or wear and wipe debris from the o-ring
using a clean, soft cloth.
Step 6 – If a replacement o-ring is necessary see
section 6.3.2.2 for o-ring replacement.
If a
replacement o-ring is not necessary, re-grease the
o-ring if required.
6-19
View looking
into top of the
System.
Spigot
Step 7 – Pull the internal prefilter straight up and
out of the System and drip dry to remove excess
water. If not reusing, place into garbage bag and
dispose. If reusing or cleaning, place on a clean
surface.
Step 8 – Inspect the prefilter spigot, located inside
the internal prefilter housing, and remove any
debris if necessary.
Step 9 – Partially fill the System (with the System
Cap off) by opening the inlet valve partially to
allow water to fill the System. Continue to fill
until the prefilter housing is between ¼ and ½ full.
This will remove any remaining air pressure in the
System.
Step 10 – Pour 250mL of 12% unscented chlorine
bleach or 500mL of 5% or 6% unscented chlorine
bleach into the prefilter housing as illustrated. Be
careful not to allow its contents to come in contact
with any skin or clothing.
NOTE: Filling too quickly, may lead to trapped air that may cause bubbling and splashing.
If this does occur, close the Inlet valve slightly to slow the flowrate into the System. After
filling to the appropriate level, close the Inlet valve.
NOTE: Chlorine bleach must be a new bottle (within 3 months). The effective
concentration is reduced in an open bottle over time.
6-20
Step 11 – Ensure the System Cap is tightened
properly.
Step 12 – Open in the inlet valve half way to allow
water to enter and pressurize the System.
Inlet Valve
Inlet Valve
Bypass
Valve
Outlet Valve
Step 13 – As the System begins to fill with water,
air will be heard escaping from the air vent.
When the System is full, no more air will be heard
escaping. Inspect for leaks.
Advanced
Controller
Step 15 – Once no leaks are present after filling
and pressurizing, allow the System to soak for 60
minutes. This will allow the sanitizing solution
time to distribute itself throughout the entire
System.
Outlet Valve
Step 14 – When no further air exits the System,
open the inlet valve completely. Note – If a leak is
observed, the cap was not properly installed or the
o-ring is damaged or dirty. Return to step 1 if any
leaks are detected.
Base Controller
Step 16 – Flush the System using the controller.
See section 5.4.7.3 for the Base Controller and
section 5.4.8.3 for the Advanced Controller.
6-21
After the System has soaked, it must be flushed as the sanitizing solution in the water supply may irritate
the skin or cause illness if ingested.
Step 17 – If you are installing a new Carbon
Prefilter, see section 6.3.2.4.
Inlet Valve
Step 18 – Pressurize the System slowly to allow
air to escape through the System air vent.
Inlet Valve
Bypass
Valve
Outlet Valve
Outlet Valve
Step 19 – Open the outlet valve.
Step 20 – Dispose of protective gloves and wash
hands thoroughly in warm water and soap to
remove any possible contamination from hands.
6-22
Step 21 – To eliminate the residual sanitizing
solution from the household piping, turn all
household cold water taps on full for 5 minutes.
Ask homeowner to leave taps on for 30 minutes.
6.4.3
Step 22 – Clean the stainless steel on the unit.
See section 5.5.7 for cleaning procedures.
Cleaning Solution Procedures (for MWF4200AWS)
Inlet Valve
Inlet Valve
Advanced
Controller
Base Controller
Bypass
Valve
Outlet Valve
Outlet Valve
Step 1 - Close the Inlet and Outlet valves. The
house will be without water during this time.
Step 2 - Drain System by pressing flush on the
entire controller. Refer to section 5.4.7.3 for base
controller and section 5.4.8.3 for advanced
controller.
During this procedure, DO NOT open the Bypass Valves, as this will allow potentially contaminated
water into the household distribution system. Contaminated water may lead to person injury and in
serious cases even death.
NOTE: If System drain hose has been installed above drain outlet, the manual drain
valve, located on the System’s clean water pipe assembly, may be required to provide
adequate System draining prior to removing the System Cap.
6-23
Step 3 - Remove cap. (Use pressure gauge first to
ensure no System pressure first.)
Step 4 - Inspect o-ring for damage or wear and
wipe clean. Re-grease with NSF approved o-ring
grease if required.
Step 5 - Remove prefilter (carbon or stainless
steel).
Discard carbon prefilter and clean
stainless steel prefilter.
Step 6 - Partially fill System with Cap off by
opening inlet valve. Fill slowly until the prefilter
housing is between ¼ and ½ full.
NOTE: Filling too quickly may lead to trapped air that may cause bubbling and splashing.
If this does occur, close the Inlet Valve slightly to slow the flowrate into the System. After
filling to the appropriate level, close the Inlet Valve.
6-24
Step 7 - Pour the MAYTAG MC1 Cleaning
Solution into a container with 250 mL (1 cup) of
water and mix thoroughly. Pour the solution into
the prefilter housing. Be careful to prevent contact
with skin or clothing. Wash the container used for
mixing the solution well before reuse.
Step 8 - Insert Carbon or Stainless Steel Prefilter
slowly to avoid overflow.
Inlet Valve
Inlet Valve
Bypass
Valve
Outlet Valve
Step 9 - Replace cap.
Step 10 - Open Inlet valve ½ way and fill System.
Watch for leaks.
Advanced
Controller
Step 11 - Soak System for 60 minutes.
Outlet Valve
Base Controller
Step 12 - Perform two 5 minutes manual flush
sequences. For base controller refer to section
5.4.7.3 and for advanced controller refer to section
5.4.8.3.
Cleaning solution may irritate the skin or cause illness if ingested. Flushing step is important.
6-25
Inlet Valve
Inlet Valve
Bypass
Valve
Outlet Valve
Outlet Valve
Step 13 - Open outlet valve.
Step 14 - Dispose of gloves and wash hands.
Step 15 - Turn all cold water taps on for 5 minutes.
Ask homeowner to leave a tap on for 30 minutes.
Step 16 – Clean the stainless steel on the System.
See section 5.5.7 for cleaning procedures.
6.5
Maintenance Service Tag
A MAYTAG Service Tag must be completed during every Maintenance visit. This will ensure that the
MAYTAG Whole Home Water Filtration System is operating properly and effectively to remove
bacteria, viruses and parasites in addition to any other contaminants for which the System was initially
specified and setup. The Checklist will also provide necessary information related to the warranty. See
section 5.5.6.1 for an example of a Service Tag.
6-26
7 Frequently Asked Questions
7.1
What does the MAYTAG Whole Home Water Filtration System do?
The System has been specifically designed to physically block and remove bacteria, viruses and parasites
including cryptosporidium and giardia (beaver fever) and eliminates cloudiness from your drinking water.
The carbon prefilter removes chlorine to improve taste and odours on municipal water.
The System effectively filters all municipal, well and lake water.
7.2
Where is the MAYTAG Whole Home Water Filtration System installed?
The System is installed at the point where water enters the house to provide filtered water from every tap.
Water is available on demand with no wasted water during filtration.
7.3
Does the MAYTAG Whole Home Water Filtration System require
electricity?
Filtration is accomplished with existing water pressure and no electricity is required to filter your water.
Unless required for pump operation, the System will continue to filter water during a power failure.
Electrical power is required to operate the solenoid valves that initiate flushing of the System. If electrical
power is not available, the System will not conduct automatic flushing. Controller settings are saved by
battery backup power.
7.4
Does the MAYTAG Whole Home Water Filtration System affect the
water pressure?
There is minimal effect on your existing water pressure. Under most circumstances, no change in water
pressure will be noticed after the installation of a new System. There is no need for an additional water
pump if the existing water pressure meets the minimum System requirements.
Under normal operation in cloudy water the System may foul more quickly than in cleaner water, may
require more frequent cleanings and may require alternate controller settings.
7-1
7.5
What can be done to increase my water pressure?
Table 7.1 outlines four reasons why water pressure may be lower than normal.
Table 7.1 – Possible causes of low water pressure
Problem
Solution
The External Prefilter Cartridge (if installed) is
fouled.
Change the prefilter cartridge.
The Internal Prefilter (Carbon or Stainless
Steel) is fouled.
Clean or change the prefilter.
The city / pump pressure is low or the line is
scaled.
Call the city or check the pump.
The MAYTAG Whole Home Water Filtration
System is fouled.
Initiate Manual Flush Function. If this does not resolve the lowpressure situation, arrange for possible System replacement.
7.6
How often does the MAYTAG Whole Home Water Filtration System
need to be replaced?
The System is designed to last the life of the membrane, with regular maintenance.
7.7
How long does the MAYTAG Whole Home Water Filtration System
last?
The System will generally last over 10 years if used on municipal water and will last from 5 to 10 years on
surface/lake waters depending on the level of contamination in the incoming water.
7.8
What do I need to do if I go away for an extended period of time?
If you wish to shut off the water supply to your house while you are away, you may simply close the outlet
ball valve on the MAYTAG Whole Home Water Filtration System. The MAYTAG Whole Home Water
Filtration System will continue to flush daily but water will be unavailable in the house. If you plan to turn
off the inlet ball valve (not recommended), you must unplug the controller. When you return open the
outlet ball valve (and unsure inlet ball valve is open and controller is plugged in) and household pressure
will be restored. It is recommended that you also turn each tap on for 10 minutes to flush out stagnant
water before use.
7.9
How do I bypass the MAYTAG Whole Home Water Filtration System?
Bypassing the MAYTAG Whole Home Water Filtration System is not recommended
unless there is an Emergency and your MAYTAG Whole Home Water Filtration System
is not working properly. Contaminated water may enter your home, which can cause
serious health problems, even death. See section 2.6 for Bypass Instructions and warning.
7-2
7.10 What happens if the power goes out?
Nothing. The timer has a built in battery backup designed for power failure. The MAYTAG Whole Home
Water Filtration System does not require power to filter water and the System will filter water provided
adequate water pressure is available at the source. If the power goes out during a scheduled cleaning, the
System will return to filtering water and wait for the next scheduled time for cleaning.
7.11 How long does the automatic cleaning cycle take?
The System backflushes itself daily to clean the System filter. It automatically flushes impurities down the
drain at the homeowner’s pre-selected time. The cleaning cycle takes approximately 5-10 minutes and uses
a minimal amount of water.
7.12 How much water is used for flushing?
Refer to section 4.8 for the Product Specifications.
7.13 How do I set a new time for the daily backwash and cleaning?
Refer to the Controller on the wall to reprogram using the instruction sheet or refer to section 5.4.7.3 for the
Base Controller or 5.4.8.3 for the Advanced Controller.
7.14 Is there a replaceable prefilter needed?
If used, the carbon prefilter needs to be replaced every 12 months.
7.15 What are the maintenance requirements?
An annual maintenance inspection, integrity test and Carbon Prefilter change is performed annually by a
MAYTAG Services Qualified Service Technician. If an External Prefilter is used, this will also need to
be checked approximately every 6 months
7.16 How long does the Carbon Prefilter last?
The Activated Carbon Prefilters are designed to filter over 100,000 US gallons. The average homeowner
will find it necessary to change the activated carbon filter every 9-12 months. The quality of water, amount
of chlorine, other contaminants in the water (chlorine), and the amount of water used determines the actual
life of an Activated Carbon Prefilter. Activated Carbon Prefilters have been designed for maximum life to
eliminate the inconvenience of changing them.
7.17 Can I water my lawn with the MAYTAG Whole Home Water Filtration
System’s filtered water?
You can use filtered water outside if you wish. You may choose to have a bypass installed if you use large
amounts of water through your outside tap that does not need to be filtered. Call MAYTAG Technical
Assistance for more details.
7.18 Can it be shut down in winter?
If the cottage or home is not winterized, there is a draining and shutdown procedure where the System is
filled with propylene glycol for the winter. Refer to section 6.2. In the spring, the propylene glycol would
be drained from the System and then sanitized for use during cottage or home opening.
7.19 What happens if there is a boil water alert in my area?
If you receive notice that there is a boil water alert in your area, there are extra precautions that you must
take with your water supply. A boil water alert is a serious announcement made in the interest of protecting
your health from water that may be contaminated.
7-3
We would recommend you take extra precautions. Follow these steps during a boil water alert:
•
•
•
•
Use household chlorine bleach to disinfect the aerators on each faucet in your home each day.
Wash your hands frequently.
Test your water for bacteria at the beginning of a boil water alert, and once a month thereafter to
ensure your water supply has not become contaminated. Call your local government officials for local
directions on water quality, testing, frequency of testing, and guidelines.
If the bacteria test indicates that bacteria exists in your home, call MAYTAG Customer Care for
assistance. If your water tests come back with results that show no bacteria in your water, continue to
use your water supply. Continue checking the water for bacteria at least once a month.
7.20 If my System came with a Stainless Steel Prefilter, can I buy a Carbon
Prefilter?
Depending on the System application, an optional Carbon Prefilter may be purchased to replace the
Stainless Steel Prefilter. Call MAYTAG Technical Assistance for support.
7.21 My water is from the lake and it has a funny smell, can something be
done?
Smells like fish or algae that come from lake water are not harmful. Using a Carbon Prefilter instead of the
Stainless Steel Prefilter may minimize these smells. However, if a Carbon Prefilter is used it will need to
be replaced more frequently than once year.
7.22 My lake water is quite dirty and the External Prefilter Cartridge
requires replacement quite often. Can I increase the time between
replacements of the External Prefilter Cartridge?
Yes. In some cases, two External Prefilters have been installed. With two External Prefilters, the time to
replace the External Prefilter Cartridge is extended by more than twice the original time.
7-4
8 Troubleshooting
The following section will help diagnose some of the problems that might occur with the MAYTAG
Whole Home Water Filtration System.
“Area”
General
Problem/Situation
A part is missing.
System leaks water.
Checking
Backpulse
Tank Pressure
Pressure is too high.
Release some of the pressure until the desire
pressure is reached.
The pressure is too low.
Add more pressure using a compressor or hand
pump.
All tanks are shipped with approximately 35 psi.
Repressurize tank and monitor for leak. Replace if
leaking.
There is no pressure in the
backpulse tank prior to adding
pressure.
Connecting
Piping
Assemblies
Threads are cross-threaded.
A leak results.
Air Vent
Correction/Action
Most standard hardware parts are available at the
local hard ware store or call MAYTAG for a
MAYTAG Whole Home Water Filtration System
replacement part.
Cap is not properly tightened.
O-ring is not clean or intact.
O-ring is not in place.
Connections are not tight.
Connections were too tight and part broke.
Water is not adequately drained from System prior
to removing cap.
Teflon tape not used on thread.
Water spouts from top.
No water is flowing through
System.
Replace the parts if possible. Add more Teflon
tape and slowly thread the two parts together to
attempt to fix the problem. Be extremely careful
with future assemblies.
Tighten connection.
Loosen connection that is too tight.
No Teflon tape, reinstall part using Teflon tape.
Air relief port is not capped.
Air vent is faulty.
Black air relief port cap must be loosened to 1 ½
turns (open).
Removal of
Cap
Can not remove cap.
System may be pressurized. Turn off inlet valve
and drain System using controller.
External
Prefilter
Does not drain fast enough.
Press and hold the red button on the top of the
housing to allow air to enter the housing and drain
more quickly.
Close the valve.
Water is leaking from the
bottom.
8-1
“Area”
Base
Controller
Problem/Situation
Drain does not function.
Correction/Action
Push “Next” once. The MANUAL indicator will
flash. Press and hold the “manual flush” button for
10 seconds. The “Manual” indicator will appear on
the screen. This will open the drain valve for 5
minutes. To toggle the valve closed at any time
press the “manual flush” button once.
If the valve still does not open, it is possible the
valve will need to be replaced.
Advanced
Controller
Drain does not function.
Ensure Controller is set to be “on” (see sections
5.4.8.3). Press and hold the “flush” button for 10
seconds until the FLUSH LED illuminates then let
go. This will open the drain valve for 5 minutes.
To toggle the valve closed at any time press the
“manual flush” button once.
If the valve still does not open, it is possible the
valve will need to be replaced.
Integrity
Tester
Refer to section 5.5.4
8-2
9 Shipping and Storage
The following sections outline the shipping dimensions, weights and storage precautions that must be taken
to ensure that damage does not occur to the MAYTAG Whole Home Water Filtration System or
Components.
9.1
Dimensions and Weights (Shipping Details) – Metric and Imperial
Units
System
Stand
Backpulse
Tank
Sub
Assembly
Kit
Advanced
Controller
Kit
Carbon
Prefilter
Stainless
Steel
Prefilter
External
Prefilter
Housing
External
Prefilter
(bagged)
Dimensions and Weights - Shipping Details
Weight (kg)
27.2
1.5
6.8
3.0
3.0
3.4
0.98
4.6
0.8
Height (mm)
360
142
570
170
170
377
377
25
508
Width (mm)
315
360
300
240
240
195
195
7.5
114
Depth (mm)
1100
360
300
185
185
195
195
7.5
N/A
System
Stand
Backpulse
Tank
Sub
Assembly
Kit
Advanced
Controller
Kit
Carbon
Prefilter
Stainless
Steel
Prefilter
External
Prefilter
Housing
External
Prefilter
(bagged)
Parameter
Weight (lb)
60
3.3
15
6.6
6.6
7.5
2.1
10.1
1.8
Height (in)
14.2
5.6
22.4
6.7
6.7
14.8
14.8
1
20
Width (in)
12.4
14.2
11.8
9.4
9.4
7.7
7.7
0.3
4.5
Depth (in)
43.3
14.2
11.8
7.3
7.3
7.7
7.7
0.3
N/A
Parameter
9-1
9.2
MAYTAG System
Parameter
Notes
New System Packaging – from MAYTAG
to Customer’s house
Corrugated MAYTAG Box (stapled), foam shipping
supports, System fitted with ¾” stoppers.
Used System Packaging – from Customer’s
house to MAYTAG
Corrugated MAYTAG Box (properly labelled and taped
with packaging tape), Corrugated shipping supports,
System fitted with ¾” stoppers
Stacking Limits
No more than 6 units high
Environmental Constraints
Cannot be exposed to temperatures below 0°C (32°F) –
freezing and damage will occur without winterization.
Storage Shelf Life/New
Do not store for more than 3 months.
Storage Shelf Life/Used
Call MAYTAG for instructions.
9.3
MAYTAG Backpulse Tank
Parameter
Notes
New Backpulse Tank Packaging – fro m
MAYTAG to Customer’s house
Corrugated MAYTAG box (stapled), Assembled to
System, protected by foam shipping supports.
Return Backpulse Tank Packaging – from
Customer’s house to MAYTAG
N/A
Stacking Limits
No more than 3 units
Environmental Constraints
N/A
Storage Shelf Life
N/A
9-2
9.4
MAYTAG System Base
Parameter
Notes
New Stand Packaging – from MAYTAG
to Customer’s house
Corrugated MAYTAG Box (stapled), protected by foam
inserts, hardware contained in bubble parts bag.
Return Stand Packaging – from Customer’s
house to MAYTAG
N/A
Stacking Limits
No more than 10 units high
Environmental Constraints
N/A
Storage Shelf Life
N/A
9.5
MAYTAG Pipe Assembly Kit
Parameter
Notes
Kit Packaging – from MAYTAG to
Customer’s house
Corrugated MAYTAG Box (Stapled), inserted in
bubble parts bag, protected by foam shipping supports.
Used System Packaging – from Customer’s
house to MAYTAG
N/A
Stacking Limits
N/A
Environmental Constraints
N/A
Storage Shelf Life
N/A
9-3
9.6
Carbon Prefilter
Parameter
Notes
New Filter Packaging – from MAYTAG
to Customer’s house
Cardboard MAYTAG Box (stapled), Filter contained in
Plastic Bag, Protective Latex gloves packed in separate
bag within filter bag inserted in System.
Used Filter Packaging – from Customer’s
house to MAYTAG
N/A
Stacking Limits
No more than 4 cases (6 per case) high.
Environmental Constraints
N/A
Storage Shelf Life
Do not store for more than 12 months.
9.7
Stainless Steel Prefilter
Parameter
Notes
New Filter Packaging – from MAYTAG
to Customer’s house
Cardboard MAYTAG Box (stapled), Filter contained in
Plastic Bag, Protective Latex gloves packed in separate
bag within filter bag inserted in System.
Used Filter Packaging – from Customer’s
house to MAYTAG
N/A
Stacking Limits
No more than 4 cases (6 per case) high.
Environmental Constraints
N/A
Storage Shelf Life
N/A
9-4
9.8
External Prefilter Installation Kit
Parameter
Notes
New Kit Packaging – from MAYTAG to
Customer’s house
Corrugated MAYTAG Box (stapled), protected by foam
inserts
Return Kit Packaging – from Customer’s
house to MAYTAG
N/A
Stacking Limits
No more than 2 units high.
Environmental Constraints
N/A
Storage Shelf Life
N/A
9.9
External Prefilter
Parameter
Notes
New Filter Packaging – from MAYTAG
to Customer’s house
Corrugated MAYTAG Box (stapled), protected by foam
inserts. Filter contained in Plastic Bag with replacement
instructions, Protective Latex gloves packed in separate
bag within filter bag.
Used Filter Packaging – from Customer’s
house to MAYTAG
N/A
Stacking Limits
No more than 2 cases (8 per case) high.
Environmental Constraints
N/A
Storage Shelf Life
N/A
9-5
10 Service Kit Information and System Drawings
10.1 Parts Assembly Drawing
The figure below shows the parts explosion for the MAYTAG Whole Home Water Filtration System.
Parts numbers are included for reference. Table below details information about each component’s Name,
Assembly Kit Number, and whether it is a critical spare or not.
.
Figure 10.1 Systems Parts Schematic
10-1
Table 10.1 - System Part Descriptions
Name
Kit Assembly
Critical
Spare?
Air Vent
Yes
Cap
No
SO-ring
Yes
System
Yes
Lockring
No
Backpulse Tank
No
Air Valve Cover
No
Air Valve O-ring
No
Base
Yes
5/16” thread X 3/8” body anchor
(stud and sleave) with washer and
Nut
No
3/8” Lockwasher (7/16” ID, Steel,
Zinc Plate)
No
3/8” Hexhead bolt (UNC X 1.5”,
steel, zinc plate)
No
10-2
10.2 System Pipe Assembly Drawings
The figure below shows the parts explosion for the MAYTAG Inlet, Drain and Outlet Assemblies
(respectively from top to bottom). Parts numbers are included for re ference. Table 10.2 details information
about each component’s Name, Assembly Kit Number and, whether it is a critical spare or not.
¾” Poly Nipple to
System Housing
Test Port
Test Cap
Stainless Steel Flexhose
¾” x ¼”
bushing
¾” FNPT
Brass “Tee”
¾” MNPT
Adaptor
To ¾” MNPT adaptor
and ¾” FNPT ball valve
(NOT PROVIDED)
Figure 10.2. Inlet and Outlet Piping Assemblies with Base Controller, MWF 4100 AWS and MWF
4200 AWS.
Note: Inlet pipe assembly with Advanced Controller, MWF 4300 AWS also has N.O. solenoid, see
MWF 4300 AWS Figure 5.5 in section 5.4.5
¾” Poly Nipple to
System Housing
Solenoid Plug and Cable
Nylon Elbow
N.C. Solenoid Valve
NOT TO SCALE
To ½” id ABS hose with
hose clamp
(NOT PROVIDED)
Figure 10.3. Drain Pipe Assembly for Base Controller (MWF 4100 AWS, and MWF 4200 AWS) and
Advanced Controller (MWF 4300 AWS).
10-3
To System Housing
¾” Poly Nipple
Test Port
Test Cap
¾” MNPT Nipple
¾” MNPT
Nipple
Stainless Steel Flexhose
¾” FNPT
Brass “Tee”
¾” x ¼”
bushing
Brass Checkvalve
NOT TO SCALE
To ¾” MNPT adaptor
and ¾” FNPT ball valve
(NOT PROVIDED)
Figure 10.4 Outlet Pipe Assembly for Advanced Controller (MWF 4300 AWS)
Table 10.2 - System Pipe Assembly Parts
Name
Kit Assembly
Critical
Spare?
¾” normally closed brass solenoid
Drain Pipe assembly
Yes
¾” normally open brass solenoid
Advanced Controller Kit
Yes
¾” Brass MNPT nipple
Advanced Controller Kit
No
¾” X ¼” Brass bushing
Inlet and Outlet Pipe assemblies
No
¾” brass Tee
Inlet and Outlet Pipe assemblies
No
¾” MNPT X 5/8” barb nylon hex
elbow
Drain Pipe assembly
No
¾” glass reinforced polypropylene
hex nipple
Inlet, Outlet and Drain Pipe assemblies
Yes
10.3 System Base Controller Drawing
The figure below shows the parts explosion for the MAYTAG Base Controller Kit (MWF 4100 AWS and
MWF 4200 AWS). Table 10.3 details information about each component’s Name, Assembly Kit Number,
and whether it is a critical spare or not.
10-4
Figure 10.5 Base Controller Schematic Diagram
Table 10.3 - Base Controller Parts List
Part
Number
67500005
N/A
Name
Kit Assembly
Base Model Controller
Base Model Controller Kit
AA batteries
Base Model Controller Kit
10-5
Critical
Spare?
Yes
10.4 System Advanced Controller Drawing
The figure below shows the parts explosion for the Advanced Controller (MWF 4300 AWS). Table 10.4
details information about each component’s Name, Assembly Kit Number, whether it is a critical spare or
not.
Figure 10.6 Advanced Controller Schematic Diagram
Table 10.4 - Advanced Controller Parts
Part
Number
67500006
Name
Kit Assembly
Advanced Controller
Advanced Controller Kit
10-6
Critical
Spare?
Yes
11 Internet Resources and Manufacturer Details
11.1 Internet Resources
11.1.1 System Information and Updates
Further System information and updates can be found at www.MAYTAG.ca.
11.1.2 Procedural Information and Updates
Further procedural information and updates can be found at www.MAYTAG.ca.
11-1