WaterGeneral RD-322 Installation & Service Manual

INSTALLATION & SERVICE MANUAL

Reverse Osmosis + DI Water Systems

Model:

RD-322 6-Stage RO+DI system, 260 GPD, single output

Note:

System must be maintained and serviced using manufacturer’s original replacement filters and parts. Using
other brands of replacement filters may shorten the life of RO membrane and damage the auto-shut-off valve.

Made by: WaterGeneral Mfg. Co.
Made in U.S.A.

PRODUCT SPECIFICATION

System Requirements

• Working pressure: 50 to 80 psi feed water pressure required, if below 50 psi, a booster pump is

recommended. We have a RO system with booster pump assembly. If the input pressure is above 80
psi, you MUST put a pressure regulator to reduce the pressure below 80 psi.

• Working temperature: 100 ~ 40 deg. F ( 37 ~ 4 deg. C )

• pH range: 2-11

• If feed water has hardness level above 300 ppm, we recommend putting a water softener prior to the RO

system.

• If feed water has iron, rust problem, we recommend putting a iron filter prior to the RO system.

• If feed water has bacteria problem, we recommend putting an ultra violet sterilizing system prior to RO

system.

Filter Service Life

• 1st Stage Sediment filter: Recommend changing every 6 ~12 months.

• 2nd Stage Carbon block filter: Recommend changing every 6 ~12 months.

• 3rd Stage Carbon block filter: Recommend changing every 6 ~12 months.

• 4th & 5th Stage TFC membranes: Recommend changing every 2~3 years.

• 6th Stage Inline DI filter (RD-322 only): Recommend changing when TDS reading is undesirable.

Warranty

• 1 year Limited Warranty on parts, components. Filters are not under warranty. System must be

maintained and serviced using manufacturer’s original replacement filters and parts. Using 3-party
replacement filters may shorten the life of RO membrane and damage the auto-shut-off valve.

Purification Processes/ Filter specifications

Removes microbiological contaminants like Cysts (protozoan), inorganic/Radiological contaminants like
Barium, Cadmium, Copper, Chromium (hexvavalent), Chromim (trivalent), Fluoride, Lead, Radium
226/228, Selenium, etc.
Ammonia, Arsenic, chloramines, chlorine, copper, lead, nitrate, phosphate, silica, hardness, calcium,
magnesium, other dissolved solids.

Thank you for choosing Watergeneral Reverse Osmosis Water Systems. You now own a superb Reverse Osmosis (RO) +
Deionization (DI) system that effectively reduce most contaminants, organic and inorganic compound, unwanted taste and
odor from tap water. It is designed to transform your tap water into distill water.

Read carefully and follow the instruction in this manual before proceeding with actual installation. Failure to do so could
result in personal injury or damage to the equipment or other properties. Be sure to follow any special plumbing codes in
your area.

CHECK LIST:

1. Reverse Osmosis+DI Unit

2. for (RD-167) which includes water storage tank, 4 gallon outside volume (holds 3.2 gallons @60psi)

3. Installation kit consists tank ball valve, drain saddle valve, feed water adapter, feed water needle valve, faucet

assembly(for RD-167) , tubing, tube inserts

4. Installation manual

INSTALLATION KIT:

1. Drain saddle clamp

2. ¼” tubing

3. Bottom filter housing wrench

4. ½” feed water adapter

5. garden hose adapter, 3/4H x 1/4" tube

6. chrome ball valve for water supply

7. side-mount float valve

8. Ball valve, ON/OFF 1/4"

RECOMMENDED TOOLS LIST

Variable speed drill 1/8” 1/4”, 7/16”, 1/2”, and 5/8” drill bit
5/8, 9/16 open-end wrench, or adjustable wrench, pliers Phillips screwdriver
Utility knife, or scissor Teflon tape

OPERATING PARAMETER

• Working pressure: 40 to 80 psi feed water pressure required. If input pressure is below 40 psi, a booster pump or a

permeate pump is needed. We have a RO system with built-in permeate pumps, and we also carry booster pumps.
If the input water pressure is above 80 psi (you must use a pressure regulator to step down the pressure). We
also carry small pressure regulators just for the RO system.

• Working temperature: 100 ~ 40 deg. F ( 37 ~ 4 deg. C )

• If feed water has hardness level above 300 ppm, we recommend putting a water softener prior to the RO system.

• If feed water has iron, rust problem, we recommend putting an iron filter prior to the RO system.

• If feed water has bacteria problem, we recommend putting an ultra violet sterilizing system prior to RO system.

WARNING: Do not use this RO+DI system alone to treat water with bacteria problem or water source with unknown

quality.

WARNING: Do not connect HOT water source to this unit.
WARNING: Incorrect installation will VOID the warranty.
WARNING: Input pressure must not exceed 80 psi. Pressure regulator must be installed to reduce pressure.

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About the system
Reverse Osmosis process is a separation process. Tap water enters the system, and it is separated at the 4th stage

membrane filter. Pure water would go to one side, and the other side carrying all the minerals is purged to the drain. The
ratio of purified water to drain water for single membrane is about 1:4 (depends on water pressure). That means for every
gallon of water you use, it will drain 3 gallons. The drain is required for the RO process to work. If the drain is
intentionally shut off, all the minerals will be accumulated inside the membrane, and it would permanently damaged the
membrane filter.
All Reverse Osmosis units require purging of water when it’s producing water.

Double membrane design:

The advantage of double membrane design is to double the capacity and halves the drain. A typical single membrane RO
drains about 4 gallons for every gallon of pure water. Double membrane RO only drains 2 gallons for every gallon of
pure water.
Production rate: The system requires higher operating pressure than typical single membrane. The system uses two 150
GPD (gallons per day) RO membranes in series. The actual production rate will depend on water input pressure,
temperature, and water chemistry. At optimal condition the membrane will make 280 GPD, but on average, it would
make about 220 gallons per day at 60psi and 240 GPD at 70psi.
Drain rate: The drain rate of the system is set at 1100 mL/min. using a flow restrictor. This drain rate is constant,
independent of input pressure.

How to attach tubing to the system

There are two types of fittings in the system. Compression and quick-connect

compression fitting connections: first, you
must unscrew the compression nut off the
fitting, then pass the tubing through the
compression nut about 1”, then screw on to
the fitting, then use a 5/8” wrench to tighten
the nut until the thread is not visible. Don’t
over-tighten it.

Connect to garden hose or laundry room hose

1. You can connect the ¾” garden hose adapter directly to a hose valve or to a hose.

2. Make sure the black rubber gasket is seating at the bottom of the thread. Then screw on the adapter

directly to the hose or hose valve. Use pliers if necessary.

3. The other end of the adapter is a Quick-connect fitting ¼”. So just push in the ¼” tubing about ½”

into the fitting, then it will seal itself. (Note: to disconnect tubing, just push the plastic ring against
the fitting, then pull out the tubing)

4. Then for other tubing connection, please refer to the picture shown next page. The drain line can

just run to open drain or to the laundry room drain.

5. You can also use a hose Y-connector to connect to the hose valve to have two outlets, so one for

the system and one for your laundry room washer.

Quick-connect fitting:
To connect tubing- begin with fresh cut or new tubing, then push the
tubing all the way into the fitting. It has to go through the O-ring that’s
inside. Then it will seal itself.

To disconnect tubing- push the collet (the plastic ring near the opening)
with one hand and pull the tubing using the other hand.

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