Table of Contents
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Model RHW42
How to install, operate
and maintain your Demand
Controlled Water Softener
PRODUCT AND WARRANTY
REGISTRATION
Register your product
online to validate and
extend your warranty.
See warranty page for
details.
www.rheemwatertreatment.com
If you have any questions or concerns when
installing, operating or maintaining your water
softener, call our toll free number:
1-800-754-7027
www.rheemwatertreatment.com
or visit
When you call, please be prepared to provide
the model and serial number of your product,
found on the rating decal inside the salt lid.
System tested and certified by NSF International
against NSF/ANSI Standard 44
for hardness reduction, efficiency and the
reduction of barium and radium 226/228,
and certified to NSF/ANSI Standard 372.
Manufactured and warranted by
Water Channel Partners
1890 Woodlane Drive
Woodbury, MN 55125
7386481 (Rev. A 11/10/20)
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Table of Contents
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Summary of Contents for Rheem RHW42
- Page 1 Model RHW42 How to install, operate and maintain your Demand Controlled Water Softener PRODUCT AND WARRANTY REGISTRATION Register your product online to validate and extend your warranty. See warranty page for details. www.rheemwatertreatment.com If you have any questions or concerns when...
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Page 2: Table Of Contents
TABLE OF CONTENTS Page Specifications & Performance Claims ............3 Before You Start . -
Page 3: Specifications & Performance Claims
Operational efficiency is the actual efficiency after the system has been installed. It is typically less than the rated efficiency, due to individual application factors including water hardness, water usage, and other contaminants that reduce a softener's capacity. Model RHW42 Model Code rH42 12,400 @ 2.5 lbs. -
Page 4: Before You Start
Before You Start = The water softener requires a minimum water flow of 3 gallons per minute at the inlet. Maximum allowable inlet water pressure is 125 psi. If daytime pressure is over 80 psi, nighttime pressure may exceed the maximum. Use a pressure reducing valve if necessary (Adding a pressure reducing valve may reduce the flow). -
Page 5: Inspect Shipment
Inspect Shipment The parts required to assemble and install the water Remove and discard (or recycle) all packing materials. softener are included with the unit. Thoroughly check To avoid loss of small parts, we suggest you keep the the water softener for possible shipping damage and small parts in the parts bag until you are ready to use parts loss. -
Page 6: Installation Requirements
Installation Requirements LOCATION REQUIREMENTS PLUMBING CODES Consider all of the following when selecting an installa- All plumbing must be completed in accordance with tion location for the water softener. national, state and local plumbing codes. = Do not locate the water softener where freezing temperatures occur. - Page 7 Installation Requirements VALVE DRAIN REQUIREMENTS 1/4” NPT Thread Barbs for 3/8” Using the flexible drain hose (included), measure and I.D. Tubing cut to the length needed. Flexible drain hose is not Hose Clamp allowed in all localities (check your plumbing codes). If local codes do not allow use of a flexible drain hose, a Drain Hose rigid valve drain run must be used.
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Page 8: Installation Instructions
The weight of the tank, when full of ASSEMBLY water and salt, may cause the tank to fracture at the shim. 1. Rheem models are factory assembled. During ® installation, unsnap and remove the top cover, continued on next page together with the salt lid, to expose the softener valve assembly. - Page 9 Installation Instructions TYPICAL INSTALLATION (with optional motorized water shutoff valve) Hard Water Soft 1” NPT Water To Outside Pipe Nipple Faucets (not included) Water Softener Plug into Controller Valve Pipe Optional Motorized Water Shutoff Valve 1” NPT Sweat Controller (not included with Adaptor (not water softener) included)
- Page 10 Installation Instructions continued from previous page Top Cover Nozzle & Venturi 2. Visually check and remove any debris from the Assembly water softener valve inlet and outlet ports. Salt Lid 3. Make sure the turbine assembly spins freely in the "out"...
- Page 11 Installation Instructions COLD WATER PIPE GROUNDING INSTALL SALT STORAGE TANK OVERFLOW HOSE CAUTION: The house cold water pipe (metal only) is often used as a ground for the house 1. Measure, cut to needed length and connect the 3/8” electrical system, The 3-valve bypass drain line (provided) to the salt storage tank overflow type of installation, shown in Figure 8, elbow and secure in place with a hose clamp.
- Page 12 Installation Instructions SANITIZE THE WATER SOFTENER / SANITIZE AFTER SERVICE Care is taken at the factory to keep your unit clean and If removing sanitary. Materials used to make the unit will not infect clips... or contaminate your water supply, and will not cause bacteria to form or grow.
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Page 13: Programming The Water Softener
Up moves the display ahead; down FIG. 17 sets the time back. NOTE: Press buttons and quickly release to slowly This is a reminder to use Rheem RHWSC Water advance the display. Hold the buttons down ® Softener Cleaner (P/N RHWSC21) three times a for fast advance. - Page 14 Programming the Water Softener NOTE: If your water supply contains iron, compen- which KCl dissolves. See also Page 21 for more sate for it by adding to the water hardness information on salt types. number. For example, assume your water is 2.
- Page 15 Programming the Water Softener EXTRA RECHARGE PROGRAM MEMORY If electrical power to the softener goes off, the time Sometimes, a manually initiated recharge (regenera- display is blank but the electronic controller keeps the tion) may be desired, or needed. Two examples are: correct time for several hours.
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Page 16: Connecting The System To Wi-Fi
Connecting the System to Wi-Fi STEP 1. DOWNLOAD THE iQua™ APP STEP 3. PUT WATER SOFTENER CON- TROL INTO CONNECT MODE Go to the App Store or Google Play and download the iQua™ app. This must be installed on your 1. - Page 17 8. The app will prompt you to provide a nickname for begins with WCD, followed by a serial number. your softener. This will be displayed on the This is your Rheem water softener. Select it and “Devices” list when you sign in to the app. After ®...
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Page 18: Controller Features
Controller Features OPTIONAL SETTINGS: California Efficiency Requirement SALT EFFICIENCY Your Rheem Water Softener has a “High ® CLEAN FEATURE Efficiency” feature that can be set ON or OFF. This softener is shipped with the efficiency fea- CLEAN FEATURE MINUTES ture set OFF, which will utilize the maximum... - Page 19 Controller Features 4. Press SELECT again to display the “Recharge 6. Press SELECT again to display the backwash time Days” screen. “Add” screen. FIG. 50 FIG. 52 BACKWASH & FAST RINSE TIMES: If you expe- MAXIMUM DAYS BETWEEN REGENERATIONS: rience salty tasting water after regeneration, you The electronic controller automatically determines may need to increase the backwash and fast rinse regeneration fre quency.
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Page 20: Bypass Blending Valve
Bypass Blending Valve SERVICE POSITION The bypass blending valve works as a typical push- (Normal Softener Operation) pull bypass valve, but has the added ability to finely adjust hardness of the treated water leaving the water softener. If slightly harder water is desired than is Soft Water normally output by the water softener, this bypass Hard... -
Page 21: Routine Maintenance
Routine Maintenance ADDING SALT BREAKING A SALT BRIDGE Sometimes, a hard crust or salt “bridge” forms in the Lift the salt lid and check the salt storage level fre- brine tank. It is usually caused by high humidity or quently. If the water softener uses all the salts before you refill it, you will experience hard water. - Page 22 Routine Maintenance CLEANING THE NOZZLE & VENTURI PROTECT THE WATER SOFTENER FROM FREEZING A clean nozzle & venturi (See Figure 58) is a necessity for the water softener to work properly. This small If the softener is installed where it could freeze (sum- component creates the suction to move brine from the mer cabin, lake home, etc.), you must drain all water brine tank, into the resin tank.
- Page 23 Troubleshooting Guide PROBLEM CAUSE CORRECTION 1. No salt in the storage tank. Refill with salt and then use RECHARGE NOW feature. No soft water No soft water & dis- 1. Power supply unplugged at wall outlet, or Check for loss of power and correct. Reset electronic play is blank power cable disconnected from back of elec - controls and then use RECHARGE NOW feature.
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Page 24: Troubleshooting
Troubleshooting AUTOMATIC ELECTRONIC DIAGNOSTICS 3. The letter “P” and a dash (or dashes) indicate POSITION switch operation (See Figure 61). If the This water softener self-monitors electronic compo- letter appears, the switch is closed. If the dash nents and circuits for correct operation. If a malfunc- shows, the switch is open. - Page 25 Troubleshooting RESETTING TO FACTORY DEFAULTS Position Markers (valve in service) To reset the electronic controller to its factory default for all settings (time, hardness, etc.): 1. Press the SELECT button and hold it until the dis- play changes twice to show “CODE” and the flash- ing model code.
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Page 26: Wiring Schematic
FIG. 65 Optional Motorized Water Shutoff Valve The Motorized Water Shutoff Valve (sold separately) Motorized Water Shutoff Valve may be used with this Rheem Wi-Fi connected water ® softener and the iQua™ app to remotely turn off the home’s water supply. For example, you may want to turn off the water when going away on vacation. - Page 27 Notes...
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Page 28: Exploded View & Parts List
Softener Exploded View Valve Assembly See Pages 30 & 31 for parts... - Page 29 0502272 Resin, 1 cu. ft. Overflow Hose Adaptor Kit – 7331258 7384659 Repl. Brine Tank (order badge below) (includes Key Nos. 26-28) 7386538 Badge, Rheem Adaptor Elbow 7384641 Grommet 7384633 Support, Faceplate Hose Clamp Repl. Electronic Control Board (PWA), 7310202 Repl.
- Page 30 Valve Exploded View Wear Strip Seal Cross-section View...
- Page 31 Valve Parts List Part No. Description Part No. Description Motor, Cam & Gear Kit, 1” 7386986 Bypass Blending Valve Assembly, 1” – 7384691 (includes Key Nos. 100-102) Turbine & Support Assembly, Motor – 7290931 including 2 O-Rings (See Key No. 123) &...
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Page 32: Warranty
The factory warranty for your water softener is shown below. The one year full warranty period on parts and labor can be extended to five (5) years from the date of purchase if you use Rheem RHWSC Water Softener Cleaner on your sys- ®...
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Questions and answers
my conditioner light is blinking, but the salt level shows 2, and I have salt up to level 3, and the "clean" light is not showing either, so what could cause the light to blink?
The blinking light on a Rheem RHW42 conditioner when the salt level shows 2 could be caused by the salt level being set too low. The manual states that the status light will flash at level 2 or below. If the actual salt level in the brine well is at level 3, you need to press the SET SALT LEVEL button to adjust the salt level bars on the display to match the actual salt level in the brine well.
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How much cubic feet of salt for the Rhw42? I need to know how much Cleaning Liquid to use.
The Rheem RHW42 water softener uses 1.20 cubic feet of high-capacity ion exchange resin. However, the context does not specify the exact amount of salt and cleaning liquid needed in cubic feet.
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