STERLING HMX-1 Series Water Treatment Instruction Manual

June 13, 2024
STERLING

INSTALLATION MANUAL
HMX-1 STERLING HMX-1 Series Water Treatment

SECTION I. INTRODUCTION

Congratulations, you have just purchased one of the finest Point-of-Use Heavy Metal Reduction Appliances available.
Like any other fine product, this appliance requires periodic maintenance in accordance with the schedule outlined. Have your water checked periodically to verify heavy metal reduction.
Your new Heavy Metal Reduction Drinking Water system (HMX-1) uses a non- leaching material to reduce unwanted arsenic 3, arsenic 5, lead, cadmium, copper, antimony, mercury, zinc, nickel and selenium in a water supply.
LIABLITY
All information and recommendations appearing in this manual concerning the use of products described herein are based on information contained in good faith but makes no representation as to its comprehensiveness or accuracy. However, it is the user’s responsibility to determine the suitability for his own use of such products. Since the actual  use by others is beyond our control, no guarantee, expressed or implied, ismade by Franklin Electric Co., Inc. as to the effects of such use or the results to be obtained. Franklin Electric Co., Inc. assumes no liability arising out of the use by others of such products. Nor is the information herein to be construed as absolutely complete, since additional information may be necessary or desirable when particular or exceptional conditions or circumstances exist or because of applicable laws or government regulations.
*Recommended Filter Change Schedule
ARSENIC:**

<=60ppb           1,800 gallons
<=70ppb           1,500 gallons
<=90ppb           1,200 gallons
<=100ppb         1,000 gallons
>100ppb   Not Recommended

LEAD:

<=100ppb               1,800 gallons
>100ppb   Not Recommended

Periodically test treated water for contaminant level!

SECTION II. SPECIFICATIONS

TABLE A – RECOMMENDED OPERATING LIMITS FOR FEED WATER

Specifications HMX-1
Water Pressure 40-100 psig
Temperature 40-100°F
pH 5.0-8.0 (lower pH is favorable for arsenic reduction)
Hardness More than 5 gpg*
Iron Less than 0.1 ppm (also mg/I)
Manganese Less than 0.01 ppm (also mg/I)
Total Heavy Metal Contaminant Less than or equal to 100 ppb (0.010 ppm or

mg/I)
Silica| Less than 30 ppm (also mg/I)
Bacteria| Must be potable**

IMPORTANT: The HMX-1 may be installed on waters containing heavy metals listed in Section I.; however, the total heavy metal concentration of the incoming water supply must be less than or equal to 100.0 ppb. Installing this unit on water with greater than 100.0 ppb of heavy metals may result in harmful heavy metal bleed through in excess of the MCL established by the EPA. I.E. arsenic MCL = 10 ppb, lead MCL = 15 ppb, etc.
Have your water checked periodically to avoid harmful levels of heavy metal bleed through! Satisfactory test results will be less than or equal to the MCL established by the EPA!
*Does not require softened water. Calcium aids in the adsorption of heavy metal on the filter material and protects it from being fouled by silica. The HMX-1 works with softened water, but if silica is present performance and life of cartridge will be significantly reduced. If the water is soft, preceding the unit with a reverse osmosis system provides the ideal water quality to ensure optimal performance.
DO NOT USE WITH WATER THAT IS MICROBIOLOGICALLY UNSAFE OR OF UNKNOWN QUALITY.
TABLE B – SYSTEM SPECIFICATIONS**

Specifications HMX-1
Overall Height 14”
I/O ¼”
Flow Rate 0.5 gpm

SECTION III: PREPARATION

A. Major System Components The following components comprise the HMX-1 Heavy Metal Reduction System:

  1. A Heavy Metal Reduction assembly consisting of the aluminum bracket, screws, wrench, filter housing, installed HMRC10 filter, installed shutoff ball valve with fittings.
  2. An automatic shut-off water meter with installed fitting on OUTLET.
  3. A faucet kit with ¼” fitting.
  4. A plastic tubing kit with feed water valve and leak stop valve.
  5. Other items necessary for installation may include wood screws or machine screws for mounting the HMX-1 assembly, concrete anchors may be required for hanging on basement wall, additional tubing or tube connectors, and plastic wire ties for organizing tubing.

B. Tools Recommended for Installation
The following tools will cover most of the installation sites encountered:

  • 3/8″ variable speed electric drill.
  • Extension work light with outlet.
  • Safety Glasses.
  • 1-1/4″ porcelain hole cutter kit.
  • 1-1/4″ Greenlee hole punch and 1/8″ and 1/2″metal drill bits for pilot hole.
  • Center punch and hammer.
  • 1-1/4″ wood bit.
  • Assorted wood and metal drill bits including 7/32″ metal drill bit.
  • Phillips head and flat blade screwdrivers.
  • 1/2″, 9/16″ and 5/8″ open end wrench.
  • 10″ Crescent wrench with jaws taped to hold faucet.
  • Teflon tape.
  • Wide masking tape or duct tape.
  • Plastic tubing cutter.
  • Extra plastic tubing.
  • Small bottle of liquid chlorine bleach.

C. Determine System Location
The HMX-1 system can be located under a sink or in a basement depending on space availability and the customer’s preference. If a basement installation is selected, additional tubing, hardware and fittings may be needed and a hole will have to be made from inside the cabinet, through the floor, to the basement. Never install in an area of the home where temperature is freezing as damage to the system will result.
Considerations for an ice maker or other remote hook up should be determined, including routing and any additional tools, fittings, and tubing that may be required.

  1. Faucet – The faucet should be placed near the sink where drinking water is normally obtained. Convenience of use (filling of water pitchers and glasses), and an open area beneath the faucet under the sink for attaching product tubing are considerations.
    A 2″ diameter flat surface is required above and below the mounting site. The thickness of the mounting surface should not exceed 1-1/4”. Watch for strengthening webbing on the underside of cast iron sinks.

  2. HMX-1 Assembly – The HMX-1 Assembly may be mounted on either the right or left side of the under-sink area or a cabinet. Mounting in the basement is also an option.
    The mounting location should allow adequate clearance and accessibility for cartridge changes.

  3. Feed Water Connection – The feed water valve should be located as close to the HMX-1 assembly as possible. USE A POTABLE COLD WATER SUPPLY ONLY. Iron-free, soft water pre-treated by RO provides optimal performance.

  4. Leak Stop Valve – Drinking water systems inherently have many connections which could leak. It is necessary to install the included Leak Stop Valve very close to and/or under the filter assembly. It must be fastened to the floor or cabinet base with
    screws or double-sided tape. The feed water supply must pass through the Leak Stop Valve (See page 9). Should a leak occur and the underside of the Leak Stop Valve gets wet, the feed water will be terminated. Once activated, the Leak Stop Valve can be reset one time (See page 12).

D. Prepare the Area for Installation
Clear the area under the sink prior beginning the installation.
If a basement installation is called for, determine where components will be located and how they will be mounted. Special mounting brackets and hardware may be necessary to secure the system to a wall or ceiling joists.
Inspect cold water supply line to determine if any special fittings, in addition to what is included in the kit, are required.
E. Prepare the Appliance for Installation
Open shipping carton and remove components. Check that all installation parts are present which includes the filter assembly, water meter, faucet, installation hardware, leak stop valve, tubing, and wrench.

SECTION IV. INSTALLATION STEPS

All plumbing should be done in accordance with state and local plumbing codes.
NOTE: Some codes may require installation by a licensed plumber; check with the local plumbing authority prior to installation.
In restricted under-sink areas, it may be easier to install the faucet first. Allow adequate tubing lengths for any final component position.
A. Install the Faucet

The faucet should be positioned so that it empties into a sink and the spout swivels freely for convenience. If the sink already has a hole provided that can accommodate the HMX-1 faucet, then no drilling is required and you can proceed to the section on mounting the faucet.

  1. Make the Faucet Mounting Hole
    IMPORTANT: It is mandatory that safety glasses be worn during sink hole drilling operations to prevent eye injury. Before starting the hole making operation, always check below the sink so that nothing interferes with mounting the faucet such as reinforcing ribs, support brackets or cabinet construction.

STAINLESS STEEL SINK:
Recommended tools:

  • Center punch
  • Variable speed drill and high speed drill bits.
  • Greenlee chassis punch 7/8” hole size (alternate 9/16” size may be used for non air gap faucet)
  • Protective gloves
    Procedure:
    a) Center punch a small indent at the desired faucet location.
    b) Slowly drill the required pilot hole for the chassis punch.
    c) Set up the chassis punch per instructions and tighten nut to cut the desired hole size.
    d) Clean up sharp edges with a file if necessary.

PORCELAIN/ENAMEL/CERAMIC ON SHEET METAL OR CAST IRON BASE:
Recommended tools:

  • Variable speed drill
  • Relton porcelain cutter tool set 7/8″ size (alternate 9/16: size may be used for air gap or non-air gap faucet)
  • Plumber’s putty

It is important to understand what is involved in this procedure. First, the glassy layer of porcelain must be penetrated through to the base metal. Second, a center disc of porcelain must be removed while protecting the surrounding porcelain against chip-
ping or fracturing. Third, the base metal must be drilled through to complete the hole.
Procedure:
a) Mark the center for the 7/8” hole
b) Form shallow putty dam around hole area and fill with enough water to lubricate carbide drill bit.
c) Carefully drill pilot hole through porcelain/enamel and base metal using carbide type pilot drill.
IMPORTANT: Always operate drill with light pressure at slow speed (300-400 rpm).
d) Insert pilot tip of spring-loaded porcelain cutter into pilot hole.
e) Drill porcelain/enamel using spring-loaded porcelain cutter, making certain a complete ring has been cut through the porcelain/enamel to the metal base.
f) Change to the metal cutter. With slow speed and light pressure, cut away the inner porcelain/enamel disc down to base metal. Make certain that the cutter does not touch outer rim of the cut porcelain/enamel.
Continue with this bit to cut through metal until sink has been completely penetrated.
IMPORTANT: When using a porcelain cutter it is critical to take precautions that it is always in a sharpened condition. Dull cutters are known to chip sinks.
2. Mount the Faucet:
a) Familiarize yourself with all components shown in faucet diagram.
b) Disassemble hardware from the threaded nipple, except for chrome base plate and rubber washer.
NOTE: Rubber washer may be replaced with bead of plumber’s putty for neater appearance.
c) Connect length of standard 1/4″ tubing to faucet. Ensure plastic insert is in tubing. Push on firmly until it seats.
d) Feed the threaded nipple through sink/counter mounting hole and orient the faucet as discussed with the customer.
e) From below sink/counter assemble the black plastic washer, star washer and hex nut on threaded nipple and tighten by hand.
f) After rechecking faucet orientation, tighten hex nut (9/16″ wrench or deep socket) until faucet feels secure.
g) From above the sink make any minor orientation corrections by turning the faucet with a padded adjustable wrench.
h) Install plastic ferrule and compression nut on tubing.
Note: Flats on chrome faucet may be used for tightening with an adjustable wrench. Use care not to mar chrome finish.
B. Install the Feed Water Valve and Tubing
The feed water valve supplied is designed for use with typical cold water shutoff valves with flexible hose connection to the faucet. Other hardware may be required for a different cold water supply configuration.
Feed Water Valve Installation NOTE: For basement installations the existing feed water tubing may have to be longer to reach feed valve.
C. Automatic Water Meter
Apply Teflon tape to threads on the INLET of the water meter and screw the inlet of the meter into the OUTLET of the filter housing. Meter should be tightened enough so that there are no leaks and the meter is facing the front of the HMX-1 housing assembly. This will allow for ease of setting the meter in gallons.
Tubing installation

  1. Insert free end of feed water tubing into the ¼” fitting on the water meter.
  2. Insert the tubing into the fitting on the faucet.
    D. Setting the Shut-off Meter

IMPORTANT: Before starting this procedure, make sure a complete heavy metal water test has been done and those numbers provided.
The HMX-1 may be installed on waters containing heavy metals listed in Section I.; however, the totalheavy metal concentration of the incoming water supply must be less than or equal to 100.0 ppb. Installing this unit on water with greater than 100.0 ppb of heavy metals may result in harmful heavy metal bleed through in excess of the MCL established by the EPA. I.E. arsenic MCL = 10 ppb, lead MCL = 15 ppb, etc.
Set the automatic shut-off meter to the recommended number of gallons shown on page 3. See “Changing Filter” for filter replacement procedure. E. Make Final Tubing Connections and Install the Leak Stop Valve  With all of the components in place, the final tubing connections can be made. When routing tubing between components, several guidelines should be observed.

  • Tubing runs should generally follow the contour of the cabinets rather than interfere with the cabinet storage area.
  • Strive for neatness and an orderly tubing “flow” using fasteners (e.g. insulated staples) to secure the tubing. Cut tubing to the desired length.
  • Arrange the tubing so there are no sharp bends and leave some “play” in the tubing for ease of servicing.
  • Try to keep the tubing from the filter assembly to the tank and faucet as short as practical for good flow.

Securely mount the Leak Stop Valve to the base of the cabinet below the filter assembly. See III. C. 4.
on page 5 and exploded diagram on page 9.
F. Install Ice Maker Hookup (optional)
Note: Check with refrigerator manufacturer for compatibility with your refrigerator model.
The HMX-1 drinking water appliance can be connected to any standard refrigerator ice maker or ice maker/water dispenser. It should never be connected to a commercial type bar ice maker.
Hooking up an ice maker involves connecting a tee with shut off valve into the faucet tubing and routing tubing over to the refrigerator.
Before turning off the existing tap water supply to a refrigerator ice maker, always shut off the ice maker first (usually by lifting the lever arm above the bin to the upper most position). The ice maker should only be turned on again after 1-2 gallons are flushed through the HMX-1 system.
NOTE: Before any service is performed on the HMX-1 system, always turn off ice maker valve and the ice maker unit. Only turn on when system is operating.
G. Start up the System

  1. Double check that all connections are secure.
  2. Turn on feed water valve and check for leaks. If any leaks are noted, turn off valve and correct before proceeding.
  3. Turn on ball valve and open faucet until a steady stream of water flows. Close faucet, wait at least 5 minutes and carefully check for leaks. Correct as necessary.

H. Flush System of Media Fines and Check Operation

  1. Lift faucet handle and allow HMX-1system to flush 1-2 gallons down the drain or flush system until water runs clear. The flushed water should be discarded.

SECTION V. OPERATION & MAINTENANCE

A. Changing Filter
NOTE: THIS HMX-1 SYSTEM CONTAINS A FILTER WHICH MUST BE REPLACED AT REGULAR INTERVALS TO MAINTAIN PROPER PERFORMANCE. USE ONLY FACTORY APPROVED FILTERS.
Please see Page 3 for the recommended interval for changing the filters. Local conditions may dictate more frequent changes.
NOTE: The system should be sanitized before installing the replacement cartridge.
Use a drip pan to catch any water that may spill when the filter housings are removed:

  1. Close the Ball Valve on the INLET of the housing and push the red button on top of the housing to relieve the operating pressure.
  2. Loosen and remove the Filter Housing with the provided wrench. Discard the cartridge. NOTE: Exhausted filter cartridge may be disposed by normal means, due to nonleaching material. Dispose as nonhazardous solid waste.
  3. Wash the inside of the Housing(s) using a mild detergent and a soft cloth. Do not use abrasive cleaners or pads. Thoroughly rinse all soap from the housing before reassembly.
  4. To sanitize the system and replace the filter cartridge(s):
    a) Use a good quality unscented 5-1/4% liquid bleach.
    b) Add one cap full of bleach (this is 2 tsp. or 10 ml) to the filter housing.
    c) Turn the water meter to any number of gallons to allow for water flow.
    d) The dispensing faucet should be open, slowly open the ball valve on the feed water line.
    e) As soon as water begins to drip out of the dispensing faucet, close the faucet.
    f) Let the system stand for 15 minutes.
    g) At the end of the 15 minutes, in the following order, open the ball valve; open the dispensing faucet to allow purging of the chlorine to the drain.
    h) Reset the automatic shut-off meter to the number of gallons recommended on page 3.

B. Installation Drawing & Parts ListSTERLING HMX-1 Series Water Treatment -
Drawing

Ref Part Number Description
1 RO-FWV Feed Water Valve, 3/8″Mx1/2″Fx

1/4″Tube, w/1/2″Mx3/8″F Adapt.

2| BV-101| Ball valve, ¼” tube X ¼” tube
3| 4SE4| Stem elbow, ¼” tube X ¼” stem
4| 4MC| Male connector, ¼” tube X ¼” MNPT
5| USH10| ½” white housing & cap, 10” with bracket & wrench
6| ASO-14| Automatic shut-off, 1,800 gallons cap.
7| 4FC4-NPT| Female connector, ¼” tube X ¼” FNPT
8| WR200| Wrench for USH, included with housing
9| 4FC4| Faucet connector, ¼” tube X 7/16” UNF
10| RO-DW-1| Luxury long reach faucet, non air gap, chrome
11| TU-2W| ¼” OD white poly tubing, per foot
12| HMRC10| Heavy metal reduction cartridge
NOT SHOWN| ORUSH| Housing O-ring

C. Quick Connect Fittings
Your new HMX-1 Drinking Water Appliance may be outfitted with new generation of user-friendly quick connect push-in fittings. Proper use of the fittings is shown in the diagrams.
It is important that the tubing selected for use with these connectors be of high quality exact size and roundness, and with no surface nicks or scratches. If it is necessary to cut the tubing, use a plastic tubing cutter or sharp razor knife. Make a clean, square cut.
An optional blue locking clip is installed in certain fittings to provide extra security. Remove this clip first before trying to remove tubing by sliding away from fitting.
Should a leak occur at a fitting, the cause is usually defective tubing.
To fix:

  • Relieve pressure
  • Release tubing
  • Cut off at least ¼” from end
  • Reattach tubing
  • Confirm connection is leak free

TO ATTACH TUBING…

TO RELEASE TUBING…

SECTION VI. TROUBLE SHOOTING GUIDE

Problem Possible Cause Solution

Low quantity of Product Water from Treatment System or Low Pressure at the Dispensing Faucet| Feed Water Saddle Valve is plugged or closed.| Open Valve or unclog.
Clogged filter.| Replace filter.
Low water pressure| Feed Water pressure must be above 20 psig.
The Shut-off Meter reads “0”| Replace cartridge & reset Shut-off meter.
The INLET ball valve is closed.| Open valve.
Faucet leaks or drips| Leaks from base of the delivery tube.| Replace faucet.
Heavy metal contaminant level exceeds EPA MCL| Influent water quality pre- requisites have not been met.
HMRC10 cartridge capacity has been exhausted.| Install required pre-treatment equipment.
Note the number of gallons that have been used since the cartridge was installed. Replace the cartridge. Set the number of gallons to an amount lower than the numberof gallons noted previously.
Fitting leaks in general| Close the Feed Water Saddle Valve or ball valve and relieve pressure before disconnecting any tubing or replacing any fitting. Before replacing

a fitting, re–cut the tubing and re–insert into the fitting to see if that solves the leak. If pipe threads are leaking, remove and re-tape with Teflon tape.

Leak Stop Valve – Compressed Pellet Replacement

STERLING HMX-1 Series Water Treatment - cover

  1. Pull the upper cover upward and separate it from the lower body.
  2. Remove the expanded pellet from the retainer.
  3. Replace the expanded pellet with the spare compressed pellet.
  4. Seat the compressed pellet and retainer into the lower body.
  5. Push the upper cover down until it snaps securely in place.

HEAVY METAL REDUCTION SYSTEM LIMITED WARRANTY

What Does This Warranty Cover?

This warranty covers any defects in materials and workmanship of the Heavy Metal Reduction System when installed and operated within recommended parameters, with the exceptions stated below.

How Long Does The Coverage Last?

The manufacturer will warrant its Heavy Metal Reduction System, for a period of one year from the date of purchase. All implied warranties including merchantability and fitness for a particular purpose are limited to one year from the date of purchase for the Heavy Metal Reduction System. Some states do not allow limitations on how long an implied warranty lasts, so the above limitations may not apply to you.

What Will The Manufacturer Do?

The manufacturer will repair or replace at its discretion any defective component. You must pay any labor charges. You must also pay for shipping or travel charges to return the defective part(s).

What Does This Warranty Not Cover?

The above warranty will not apply to any part of the Heavy Metal Reduction System that is damaged because of neglect, misuse, alterations, accident, misapplication, physical damage, or damage caused by fire, acts of God, freezing or hot water or similar causes. Consequential and incidental damages are not recoverable under this warranty. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. We recommend that you use only the manufacturer's replacement parts since improper parts or incorrectly performed maintenance or repair voids this warranty.

How Do You Get Service?

In order to be eligible for service under this warranty you must (a) contact your local dealer who supplied the unit.

How Does State Law Apply?

This warranty gives you specific legal rights and you may also have other rights which vary from state to state.

Franklin Electric Co., Inc
Water Treatment Division
12630 US 33 N.
Churubusco, IN 46723
Ph. 260-693-1972 Fax 260-693-0602
HMX-1 Manual 211215

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