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.
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........................................................
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....................................
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?....................................................................................................................................................
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.
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.
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.
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.
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.
• 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.
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.
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.
2.7 2.7.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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”.
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.
3.5.8.
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.
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.
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.
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.
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).
(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.
• 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.
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.
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 activat
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.
• 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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
5.4.
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.
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.
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.
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.
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.
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.
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.
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.
5.4.6 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.
5.4.6.1 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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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).
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.
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).
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.
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.
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.
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.
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.
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.
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 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 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.
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.
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.
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.
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.
67500003 67500004 67500025 67500026 67500005 67500006 67500011 67500012 67500013 67500014 67500015 67500016 67500017 67500018 67500019 67500027 67500020 67500021 67500022 67500009 67500023 67500024 6.3.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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 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.
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.
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.
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.
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.
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.
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.
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.
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.
“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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
Figure 10.5 Base Controller Schematic Diagram Table 10.
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.
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.
