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For Commercial Applications
ES-WQ-PWR4022
Job Name
Job Location
Engineer
Approval
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Series PWR4022
Commercial Reverse
Osmosis Systems
Flow Rate: Up to 15 gpm (56 lpm)
Watts Pure Water Series PWR4022 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 10 to 15 gallons per minute (56 lpm).
These units are designed for floor mount installations. Reverse
osmosis is a process where high-pressure 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 PWR4022 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, high conductivity alarm output, adjustable
reject recycle, permeate and reject water flow meters, reject
recycle flow meter, permeate water check valve, inlet solenoid
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 deionization (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.
Note: Do not use with water that is microbiologically unsafe or
of unknown quality without adequate disinfection before or after
the system.
Contractor
Approval
Contractor’s P.O. No.
Representative
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PURE WATER
Series PWR4022
Features
• Membrane Auto Flush
• 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 solenoid valve
• 20" high flow pre-filter
Standards
Pre-filter Housing- NSF/ANSI Certified Std. 42
Membrane Housings- NSF/ANSI Certified Std. 61
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.
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Specifications
FRONT SIDE
Watts Pure Water Series PWR4022 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 membranes. 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 membranes.
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 solenoid 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, 7.5 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 tempera-
ture must not fall below 35°F or exceed 100°F (2 - 38°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.
Feed Water Guidelines
pH ........................ 6 to 9
Hardness (maximum) .......... Less than 1 grain per gal-
lon 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.
Dimensions - Weights
C
FRONT
MODEL NO. DIMENSIONS WEIGHTS
A B C
in. mm in. mm in. mm lbs. kg
PWR40223083 24 610 68 1727 94 2388 800 364
PWR40223103 24 610 68 1727 94 2388 900 409
PWR40223123 24 610 68 1727 94 2388 1000 455
A
SIDE
Performance
Maximum Productivity (gallons per minute) 10 12.5 15
Quality (typical membrane percent rejection) 98 %
Recovery (adjustable) 60 - 75 %
Membrane Size 4" x 40"
Membrane Array (two elements per vessel) 2:1:1 2:2:1 3:2:1
Prefilter (system ships with one 5 micron cartridge) 20" Big Blue
Feed Water Connection 1" FNPT
Product Water Connection 1" FNPT
3
Reject Water Connection
Feed Water Required (GPM at 65% recovery) 17 21 25
Minimum Feed Water Pressure 20 psig
Drain Required (maximum) 17 21 25
Electrical Requirement (other voltages available) 230 VAC, 3-phase, 60 Hz, 20 amps
Motor Horse Power / Type 7.5 / TEFC
Dimensions L x W x H (approximate) 96" x 24" x 72"
Shipping Weight (estimated pounds) 800 900 1000
⁄4" FNPT
Ordering Information
Model No. Description
PWR40223083 10 GPM Reverse Osmosis System with Micro Processor Control
and Auto Flush
PWR40223103 12.5 GPM Reverse Osmosis System with Micro Processor
Control and Auto Flush
PWR40223123 15 GPM Reverse Osmosis System with Micro Processor Control
and Auto Flush
B
A Watts Water Technologies Company
USA: North Andover, MA • Tel. (800) 224-1299 • www.watts.com
Canada: Burlington, ON • Tel. (888) 208-8927 • www.wattscanada.ca
ES-WQ-PWR4022 1122 © 2011 Watts
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