Watts PWR4024 User Manual

For Commercial Applications

ES-WQ-PWR4024

Job Name

Job Location

Engineer

Approval

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Series PWR4024

Commercial Reverse
Osmosis Systems

Flow Rates: Up to 30 gpm (113 lpm)

Watts Pure Water Series PWR4024 reverse osmosis (RO) systems
are commercial grade high-pressure RO units for the reduction
of total dissolved solids from water. They are designed to supply
reverse osmosis quality water with production rates ranging from
20 to 30 gallons per minute. These units are designed for floor
mount installations. Reverse osmosis is a process where high­pressure feed water is fed into a semi-permeable membrane. In
the membrane, pure water is allowed to pass through the mem­brane material and exit as purified permeate water. Dissolved
mineral salts are not allowed to pass through the membrane and
become a concentrated reject stream that is sent to a drain. These
RO systems use high-pressure/high-rejection membranes to
achieve a minimum average NaCl ionic rejection of 97 percent.

Watts Pure Water Series PWR4024 RO systems are a well
designed, rugged line of purifiers. This series comes with a pre­selected assortment of features, including our digital controller for
monitoring and operation. Corrosion resistant fiberglass reinforced
plastic (FRP) membrane housings, inlet and outlet pre-filter pres­sure gauges, low-pressure switch with delayed auto restart, inputs
for tank level and pretreatment interlock, conductivity meter, high­conductivity alarm output, adjustable reject recycle, permeate and
reject water flow meters, reject recycle flow meter, permeate water
check valve, inlet diaphragm valve, membrane feed and reject
water pressure gauges, auto flush, and adjustable reject valve,
are all standard features. These systems are designed to feed an
atmospheric storage tank for collection of the reverse osmosis
water. Reverse osmosis water has a wide variety of applications
including municipal water treatment, steam boiler and steam steril­izer make up, laboratory use, spot free rinsing, ice and beverage
water, water for cooking, food processing, metal plating and finish­ing, as well as water for humidification. Reverse osmosis is also
the pretreatment of choice for ion exchange type de-ionization (DI)
systems. Using RO water as make up to a DI system reduces the
exhaustion rate of the DI resin by up to 95 percent saving time,
money, and chemicals associated with DI resin regeneration.

Contractor

Approval

Contractor’s P.O. No.

Representative

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PURE WATER

Series PWR4024

Features

• Powder coated carbon steel support frame

• Corrosion resistant 300psi FRP high-pressure membrane housings

• Pressure gauges for pre-filter inlet/outlet, membrane feed, and

reject water pressure

• Low feed water pressure safety switch

• Digital microprocessor based controller with delayed auto restart

after low pressure shut down

• Permeate water conductivity meter with high conductivity alarm

output

• Tank level and pretreatment interlock inputs

• High-pressure/high-rejection membranes with 97% minimum

average salt rejection

• Permeate, reject recycle, and reject water flow meters

• Adjustable reject and reject recycle valves

• Permeate check valve

• Automatic inlet diaphragm valve

• 90 gallon per minute high flow 316 stainless steel pre-filter

Note: Do not use with water that is microbiologically unsafe or of
unknown quality without adequate disinfection before or after the
system.

Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,
please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials with­out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.

Standards

Pre-filter Housing- NSF/ANSI Certified Std. 42
Membrane Housings- NSF/ANSI Certified Std. 61

FRONT

Specifications

Watts Pure Water Series PWR4024 reverse osmosis system shall
be installed to provide reverse osmosis quality water. The RO
system shall be installed after a Series PWS water softener so that
scale forming calcium and magnesium hardness cannot scale the
RO membrane. Series PWC backwashing carbon filter shall be
installed on the RO feed water line to remove chlorine and prevent
membrane degradation due to chlorine attack. Series PWM back­washing sediment filter shall also be installed on the RO feed water
line to reduce the silt density index of the water to prevent particu­late fouling of the RO membrane.

The RO system shall be a high-pressure/high-rejection type unit
complete with permeate and reject water flow meters, reject recy­cle water flow meter, pre-filter inlet and outlet pressure gauges,
membrane feed and reject water pressure gauges, FRP mem­brane housings, automatic inlet diaphragm valve, low feed water
pressure switch, reject and recycle valves, digital controller with
conductivity meter and high-conductivity alarm output, storage
tank level and pretreatment interlock inputs, 10 horse power mul­tistage centrifugal high-pressure pump, and all other components
necessary for proper operation. The system shall be a floor mount
design. The RO permeate water shall be collected in an atmo­spheric storage tank with the tank level controlled by an electronic
level float. The RO shall be equipped with inputs for the tank level
float as well as pretreatment interlock to shut the RO system down
in the event the pretreatment begins a backwash cycle. Electrical

requirements are 230 volt 60 hertz three phase. A local drain is

required to accept drain water from the system. The feed water
pressure must not fall below 20psi. The feed water temperature

must not fall below 35°F or exceed 100°F (2-39°C).

The system shall produce reverse osmosis quality water with 97
percent minimum average ionic rejection of total dissolved solids
when operated within the manufacturer’s operational specifications.

Dimensions - Weights

C

FRONT

B

Feed Water Guidelines

pH ...................... 6 to 9

Hardness (maximum) ....... Less than 1 grain per gallon as

CaCO3 (Softened) or anti scale
chemical injection if not softened
(contact your Watts representative)

Feed Water Pressure (minimum) .20psi

Temperature ............... 35 - 100°F (2 - 38°C)

Free Chlorine (maximum) ..... None Allowed

Iron (maximum) ............. Less than .1mg/L

Oil and H2S ............... None Allowed

Turbidity ................. Less than 1.0 NTU

Silt Density Index ........... Less than 5.0 SDI

Notes:

* For all other guideline information please contact your Watts representative.

* Published maximum production rates are based on a feed water of 77°F, SDI

of less than 3, 1000 ppm TDS, and pH 8. Individual membrane productivity may
vary (± 15%). May be operated on other feed waters with reduced capacity.

* Percent rejection is based on membrane manufacturer’s specifications; overall

system percent rejection may be less.

Performance

Maximum Productivity (gallons per minute) 20 25 30

Quality (typical membrane percent rejection) 98%

Recovery (adjustable) 65% – 75%

Membrane Size 4" x 40"

Membrane Array (four elements per vessel) 2:2 3:2 4:2

Prefilter

(system ships with five micron cartridges)

Feed Water Connection 2" Flange

Product Water Connection 1.5" Flange

Reject Water Connection 1" Flange

Feed Water Required (GPM at 65% recovery) 31 39 46

Minimum Feed Water Pressure 20 psig

Drain Required (maximum) 31 39 46

Electrical Requirement

(other voltages available)

Motor Horse Power / Type 10 / TEFC

Dimensions L x W x H (approximate) 192" x 26" x 72"

Shipping Weight (estimated pounds) 1400 1600 1800

7 round x 20"

230 VAC, 3-phase,

60 Hz, 30 amps

Ordering Information

Model No. Description

A

SIDE

MODEL NO. DIMENSIONS WEIGHTS

A B C

in. mm in. mm in. mm lbs kgs

PWR40243163 26 660 74 1880 186 4724 1400 636
PWR40243203 26 660 74 1880 186 4724 1600 727
PWR40243243 26 660 74 1880 186 4724 1800 818

A Watts Water Technologies Company

ES-WQ-PWR4024 1122 © 2011 Watts

PWR40243163 20 GPM Reverse Osmosis System with Micro Processor

Controller and Auto Flush

PWR40243203 25 GPM Reverse Osmosis System with Micro Processor

Controller and Auto Flush

PWR40243243 30 GPM Reverse Osmosis System with Micro Processor

Controller and Auto Flush

USA: North Andover, MA • Tel. [phone] • www.watts.com

Canada: Burlington, ON • Tel. [phone] • www.wattscanada.ca