Clean Water Systems 7500-C User manual

7500-C Commercial Greensand Filter
Installation Guide
Thank you for purchasing a Clean Water System! With proper installation your system will be providing
Iron and Manganese free water for many years.
Please review this start‐up guide entirely before beginning to install your system, and follow the steps
outlined for best results.
Minimum pressure of 30 PSI recommended.
Maximum pressure recommended 80 PSI.
For indoor installation only.
Protect from sunlight, rain, and freezing.
GREENSAND MEDIA CONTAINS DUST.
USE MASK TO AVOID BREATHING DUST.
OK to wet down media with spray bottle
Questions?
Call us toll‐free: 1‐888‐600‐5426 or 1‐831‐462‐
8500
Email us: [e-mail]
See more information on our website:
www.cleanwaterstore.com/resources
REV 08/01/21
Clean Water Made Easy
www.cleanwaterstore.com

7500-C Greensand Filter Installation & Startup Guide
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Table of Contents
Packing Lists .................................................................................................................................................. 3
Pre‐Installation:............................................................................................................................................. 4
Best Practices for Piping & Drain Installation: .............................................................................................. 5
Installation of Your System in Copper or Metal Piping Systems:.................................................................. 6
How Your Greensand Filter Works: .............................................................................................................. 7
Assembly and Installation Instructions: ........................................................................................................ 8
Programming Your Valve and Setting Time and Days for Backwash .......................................................... 10
Initial Backwash .......................................................................................................................................... 13

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Packing Lists
All systems include:
2” 7500‐C control valve; power supply; top screen; 3ea. fitting unions with seals for inlet, outlet
and drain; distributor tube with bottom screen; funnel for adding media through the top; and
items included in one of the following options:
Find Your Size System to See What is Included:
Greensand Filter 4.0 cubic foot size
16” x 65” filter tank with distributor tube
1 box 1/8” x 1/4” filter gravel @ 50 lbs. each
8 boxes Greensand Media @ 50 lbs. each
Greensand Filter 5.0 cubic foot size
18” x 65” filter tank with distributor tube
1 box 1/8” x 1/4” filter gravel @ 50 lbs. each
1 box 1/8” x 1/4” filter gravel @ 25 lbs. each
10 boxes Greensand Media @ 50 lbs. each
Greensand Filter 7.0 cubic foot size
21” x 65” filter tank with distributor tube
2 boxes 1/8” x 1/4” filter gravel @ 50 lbs. each
14 boxes Greensand Media @ 50 lbs. each
Greensand Filter 10.0 cubic foot size
24” x 72” filter tank with distributor tube
2 boxes 1/4” x 1/2” filter gravel @ 50 lbs. each
2 boxes 1/8” x 1/4” filter gravel @ 50 lbs. each
20 boxes Greensand Media @ 50 lbs. each

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Pre-Installation:
1. Review your packing list and make sure you have received all the parts before beginning
installation.
2. If you are going to be turning off the water to the house and you have an electric water heater,
shut off the power to the water heater before beginning installation in case water heater is
accidentally drained.
3. Pick a suitable location for your filter system on a dry level spot where it won’t be exposed to
freezing temperatures. A minimum of 20 PSI is required. Maximum pressure is 90 PSI.
4. Get all of your plumbing parts together before beginning installation, and make sure you have
received all of your packages before beginning or scheduling an installation. Installation typically
takes 3 to 5 hours. However, after installation the Greensand Filter must be allowed to run
through a complete backwash and rinse cycle.
5. After the system is installed and running, your water may be discolored, or full of Pro‐OX or rust,
particularly if this is older or corroded piping. This typically clears up over a day or two.

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Best Practices for Piping & Drain Installation:
NOTE: YOU MUST USE THE UNION ADAPTORS TO CONNECT THE PLUMBING TO THIS UNIT. THESE
UNIONS ARE SPECIFICALLY DESIGNED FOR THIS PURPOSE. WARRANTY WILL BE VOIDED IF DAMAGE OR
CRACKING TO THE CONTROL HEAD IS CAUSED BY NOT FOLLOWING THESE INSTRUCTIONS. DO NOT USE
ANY THREAD TAPE OR COMPOUND ON VALVE TO FITTING INTERFACE. THE SEALS ARE ALL THAT IS
NEEDED. ONLY HAND TIGHTEN THESE FITTINGS TO THE VALVE AS WELL. THE OTHER END OF THE UNION
IS A STANDARD 2” MNPT AND YOU CAN FOLLOW STATNDARD PLUMBING PRACTICES FOR THIS
CONNECTION USING FLEX‐LINES WITH WASHERS, THREAD TAPE, OR COMPOUND.

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1. Make sure to connect the Inlet from your water source and outlet, following arrows on control
valve. Connect the External Flow Control fitting onto the Drain line. Assemble all fittings into
the 3 provided valve fitting prior to installion to the head. These seal with the blue seals and if
overtightened can damage the valve body.
2. Make sure there is a working gate or ball valve before the 7500 Greensand Filter and also one
after as well as a bypass valve. A hose bib (which is a faucet to which you can attach a garden
hose) is strongly recommended after the Greensand Filter and before the second ball valve.
This makes it easy to rinse your new Greensand Filter on start‐up and gives you a place to test
the water before it enters your piping.
3. If you will be using copper piping, do not sweat the copper pipe directly on to the 7500‐C control
valve. Avoid heating up the control valve plastic with the torch.
4. You should install unions and a bypass around the valve, so that you can remove it and still have
water (See Build Your Bypass).
5. To connect drain line to drain, use an air‐gap connection, so that if your sewer or septic tank
backs up, it cannot cross connect with the drain tubing.
Installation of Your System in Copper or Metal Piping Systems:
If your new filter system is to be installed in a metal (conductive) plumbing system, i.e. copper or
galvanized steel pipe, the plastic components of the system will interrupt the electrical continuity of the
plumbing system.
As a result, any stray currents from improperly grounded appliances downstream or potential galvanic
activity in the plumbing system can no longer ground through the contiguous metal plumbing.
Some homes may have been built in accordance with building codes, which encouraged the grounding
of electrical appliances through the plumbing system.
Consequently, the installation of a bypass consisting of the same material as the existing plumbing, or a
grounded "jumper wire" bridging the equipment and reestablishing the contiguous conductive nature of
the plumbing system must be installed prior to your systems use.
This is simple and easy step to take if you are installing your water treatment system into copper
piping. A simple ground jumper wire with a pipe clamp can be purchased at any Home Center, or
hardware store etc. for a few dollars.

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How Your Greensand Filter Works:
Service Mode: Water enters the top of the tank and flows down through the media and up
the distributor tube removing Iron and Manganese
Backwashing Mode: Water is forced down the distributor tube and up through the media
lifting and removing any trapped iron and manganese. This water goes out to the drain.
Rapid Rinse Mode: Water enters the tank and flows over the Greensand and up the
distributor tube to drain. This repacks the media to enhance the filter process.
NOTE: Make sure the DLFC is installed in the correct flow direction per the arrow on the unit.
You will need to provide fittings going from the 2” MNPT drain connection to your required
DLFC. We recommmend a minumum 1” drain line be installed so the flow is not resitricted
effecting a sufficient backwash.

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Assembly and Installation Instructions:
1. Wrap the top of distributor tube with electrical or duct tape so that no gravel or Greensand media
will go down the distributor tube when adding the media.
2. Add the filter gravel that came with your order. (Note: For the 10 cf systems, place the 2=50lb bags
of ¼” x ½” (Larger gravel) in the tank first, then add the 2 = 50 lb. bags of the 1/8” x ¼” (smaller
gravel) on top of that. You want the gravel to cover the bottom distributor screen before adding
the Greensand media.
3. Next add Greensand media. The tank should be approximately 2/3rds full of media when
complete, do not fill more than 2/3rds, even if there is some media left over.
4. Remove cap or tape from top of distributor tube. Be careful not to pull up distributor tube when
removing cap or tape.
5. Fill tank completely with water. This will allow the Greensand Filter media to settle and reduce the
need of purging the air out of the tank later.
6. Add a small amount of silicone grease to the inner O‐ring, where the distribution tube goes.
Lubricate the main tank O‐ring and screw on 7500 control valve carefully. Do not use pipe‐joint
compound, vegetable oil, Teflon tape, or Vaseline or other petroleum greases to lubricate tank
threads as this could damage the valve.

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7. Next, install the top screen mount
to the control valve by aligning the
five‐hole pattern and installing the
machine screws out of your kit.
8. Thread the top screen to
underside of 7500‐C control valve.
The Control valve is now ready to
install onto the cylinder. Do not
use wrenches hand tighten only.

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Programming Your Valve and Setting Time and Days for Backwash
Next, you will need to program the system to work as a Greensand Filter. There are a few settings
that must be changed before the system can be put into service. Plug in the control valve and begin
the programming instructions.
*IMPORTANT*: Before any operation, the valve menu must be unlocked. If the button lock
indicator is displayed, press and hold both the Up and Down buttons for 5 seconds. A sound will
indicate the menu is unlocked. The menu will re‐lock automatically after 1 minute of inactivity.
1. To begin programming your valve, unlock the menu and press the Menu/Confirm button. This
puts the valve into program display mode, indicated by the Enquiry/Setting icon being
displayed. The Enquiry/Setting icon is displayed whenever you are changing the parameter
of a programming mode.
2. The sequence of programming modes is shown in the diagram below. To switch between
modes, press the up or down button according to which direction your mode is. The modes
can only be changed when the Enquiry/Setting button is displayed, and you are not
currently modifying any other parameter.

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1) To change the Time of Day:
Change programming mode to Time of Day ( [00:00] and time of day icon displayed ). The hour
and Enquiry/Setting icon will be flashing. Change the hour value with the Up/Down buttons,
then press Menu/Confirm to move onto the minute value. Change this value with Up/Down,
and press Menu/Confirm again to confirm the time.
2) To change the Rinsing Time:
The rinsing time is the hour of day that the system will turn on to perform its function. We
recommend setting the system to backwash at 2 AM [02:00], or any time that it is unlikely any
water will be used. Note the valve uses the 24‐hour clock.
The default setting is [02:00]. The max setting is [23:59]. To change, set the programming mode
to Rinsing Time ( [00:00] ). Press the Menu/Confirm button and use the Up/Down buttons to
change the hour value. Press the Menu/Confirm button again and change the minute value
using the Up/Down buttons. Finally, press Menu/Confirm to confirm your rinse time.
3) To change the Rinsing Frequency:
The rinsing frequency is how many times the system will backwash and rinse per service.
This should be left at its default, [F-00]. This will have the system only backwash and rinse once
per service.
4) To change the Service Days:
5) The recommended initial backwash frequency setting for the Greensand Backwash Filter
is every 3 to 4 days for families or heavy use and every 7 days for 1 to 2 persons in the
home. If you experience pressure loss in between backwashes, increase frequency of
backwash up to once per day.

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To set this, change the programming mode to Service Days ( [1‐03D] ). Press the Menu/Confirm
button and use the Up/Down buttons to set it to your desired amount. Press Menu/Confirm to
confirm your input.
6) To change the Backwash Time:
The backwash time is the amount of time (in minutes) that the system will backwash for.
For a neutralizer filter, set the backwash time to 10 minutes [2-10:00]. To change this, set the
programming mode to Backwash Time ( [2‐10:00] and backwash icon displayed ). Press the
Menu/Confirm button and use the Up/Down buttons to set it to [2-10:00]. Press Menu/Confirm
to confirm the backwash time.
7) To change the Fast Rinse Time:
The fast rinse time is the amount of time (in minutes) that the system will rinse for.
For a Greensand filter, set the fast rinse time to 6 minutes [3-06:00]. To change this, set the
programming mode to Fast Rinse Time ( [3‐10:00] and fast rinse icon displayed ). Press the
Menu/Confirm button and use the Up/Down buttons to set it to [3-06:00]. Press Menu/Confirm
to confirm the fast rinse time.
8) To change the Signal Output Mode
The signal output mode refers to when the system receives external function.
Leave this at its default, [b-01].
After configuring, press the Manual/Return button to exit programming mode.

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Initial Backwash
1After programming, the system must be run through an initial backwash.
2Close inlet ball valve and outlet ball valve and open the bypass valve.
3Press the Manual/Return button to enter the backwashing cycle. When the backwash icon
is displayed, slowly open the inlet valve to a quarter position to make the water flow into
the tank; you should be able to hear air escaping from the drain pipeline.
4After all the air is out of the pipeline, continue to slowly open the inlet valve over a few
minutes period until fully open. Monitor the fluid coming from the drain until it runs clear.
5If possible, verify that the backwash flow corresponds with the size of your system below.
You can easily run the drain hose to a bucket and using a watch verify the flow rate in
gallons per minute. An adequate backwash is critical to properly clean the Greensand media
and prevent it from cementing together.
4.0 CF
15 GPM
5.0 CF
20 GPM
7.0 CF
25 GPM
10.0 CF
35 GPM
6After the backwash, the system will automatically go into the fast rinse stage. Both stages
will last if you have programmed the valve for. The control valve will return to service status
(indicated by the up flowing meter on the left) after the backwash and rinse are complete.
7Repeat the Regeneration (backwash and rapid rinse cycle) step 3‐4 more times until you see
clear water through the drain line or your hose bib.
8Open the outlet valve to your system.
Congratulations, you are done setting up your valve!