WET ES Series User manual

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ES S S Se er ri ie es s
R Re ev ve er rs se e O Os sm mo os si is s W Wa at te er r T Tr re ea at tm me en nt t S Sy ys st te em m
I IN NS ST TA AL LL LA AT TI IO ON N, , O OP PE ER RA AT TI IO ON N A AN ND D M MA AI IN NT TE EN NA AN NC CE E M MA AN NU UA AL L

2
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IM MP PO OR RT TA AN NT T U US SE ER R I IN NF FO OR RM MA AT TI IO ON N
PLEASE DO NOT DISCARD
THIS MANUAL CONTAINS IMPORTANT INFORMATION WHICH
SPECIFICALLY APPLIES TO THIS UNIT. THIS INFORMATION MAY BE
NEEDED AS REFERENCE DURING ANY FUTURE SERVICING OF THE
SYSTEM.
D
DI IS SC CL LA AI IM ME ER R A AN ND D L LI IM MI IT TA AT TI IO ON NS S
This manual discloses proprietary information of WET. This information is provided for the purpose of operating
and maintaining its RO systems, and may not be used for any other purpose.
It is recommended that this manual be read and understood before performing installation, operation, and
maintenance of the RO system. The equipment warranty may be voided if instructions are not followed correctly.
The information provided may not cover all possible variations of detail in relation to equipment use. Please
contact the WET Service Department for any technical questions that are not specifically answered in this
manual.
The Seller reserves the right to make enhancements or changes that may not be included in the manual.
Therefore, it is understood that the material presented here is subject to change without notice and is for
informational purposes only.
This manual is believed to be complete and accurate at the time of publication. However, WET assumes no
responsibility for the technical content of the manufacturer literature. Due to the inability to verify all vendor-
provided materials, WET assumes no responsibility for any errors and shall not be liable for damages in
connection with the use of this manual.
© Copyright 2006 WET. All rights reserved.
I
IN NI IT TI IA AL L I IN NS SP PE EC CT TI IO ON N A AN ND D H HA AN ND DL LI
IN NG G
On receipt of the RO unit, note any damage on appropriate shipping documents. File damage
claims with carrier immediately (not WET).
RO MODEL______________________________
INSTALLED BY___________________________
TELEPHONE_____________________________
INITIAL STARTUP DATE___________________
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Safety Check Item
Don’t Do This
Special Attention
SAFETY NOTES – READ AND UNDERSTAND BEFORE PROCEEDING
Safety Check Item
Don’t Do This
Special Attention
WARNING
√High Voltage Electricity √Spinning Parts
√High Pressure Components √Pressurized Water
√Noise
Failure to follow good safety practices and the instructions included in this manual
may result in damage to the unit, its surroundings, personal injury or death.
Please take all possible precautions when working on or around this unit.
Pressure
Reverse Osmosis units operate by forcing water at high pressure against a semi-permeable membrane. The
higher the TDS (Total Dissolved Solids) of the feedwater, the higher the pressure required to produce
acceptable amounts of purified water. Fresh water typically requires up to 150 psig to suitably overcome
osmotic pressure. Even a small leak at elevated pressures can be dangerous.
Electricity
Electricity and water DO NOT MIX. Every effort is made to insure that the electrical equipment on our systems
is resistant to water intrusion. Once installed, the system is subject to many factors beyond our control.
•The reject water of this RO unit is a concentrated solution with high electrical conductivity. Spills should be
immediately cleaned. Leaks of any kind should be repaired as soon as possible.
•Check all electrical components on a regular basis to insure that water-resistant seals are still in place and
functional.
•DO NOT DRILL HOLES IN THE TOP SURFACE OF ANY ELECTRICAL BOXES.
Chemicals
•Exposure to the highly concentrated reject water, especially at the high pressures of an operating RO unit,
can cause injury or permanent damage to the eyes, skin, and mucous membranes.
•Exposure to the chemicals used in cleaning, disinfection, and preservation is dangerous and may cause
permanent damage.
•Test all hoses and connections before using any cleaning system to clean or preserve the membranes. Do
NOT allow worn hoses or fittings to be used.
•Avoid contact with chemicals by wearing eye and skin protection equipment. Avoid breathing chemical
fumes.

Table of Contents
Section Page
System Description .................................................................................................................................5
Installation ...............................................................................................................................................8
Initial Startup .........................................................................................................................................10
Operation ..............................................................................................................................................11
System Maintenance.............................................................................................................................13
Cleaning RO Membranes......................................................................................................................16
Disinfection............................................................................................................................................21
Preservation ..........................................................................................................................................22
Troubleshooting ....................................................................................................................................23
Drawings
Unit P&I Diagram
Electrical Schematic
RO Unit Layout
Appendix
ES Series Specifications
Limited Warranty
Warranty Service Policy
Daily Operator Log Sheet
Cleaning Log
RO Maintenance Schedule

5
System Description
Theory of Operation
Feed water is supplied to the RO unit through a inlet valve. Next, the feed water passes through a
pre-filter for removal of suspended particles 5 microns or larger.
The filtered water enters a high-pressure pump where the water pressure is increased to RO
operating levels and is directed into the 1st stage RO membrane assembly. Inside the membrane
assembly, a portion of the feed water, referred to as product or permeate, passes through a
membrane barrier that rejects suspended and dissolved solids. The remaining portion of feed
water, referred to as reject or concentrate, carries concentrated contaminants out of the membrane
assembly. This reject water is sent to the 2nd stage RO membrane assembly, which extracts
additional product water.
The reject water, upon leaving the 2nd stage RO membrane assembly, is regulated by a Reject
valve, and is monitored by a flow indicator, before leaving the system to waste.
The combined product water from both the first and second stage RO membranes is monitored by
a conductivity sensor and analytical instrument to determine the Total Dissolved Solids content of
the product water.
Recovery, an important operating parameter, is the ratio of the product water to the feed water
flow. See the System Specifications section of this manual for details.
The ES Series of RO systems will produce high quality water from either municipal or well
water supplies. The reverse osmosis process uses a semi-permeable spiral wound membrane
to separate and remove dissolved solids, organics, pyrogens, submicron colloidal matter, and
bacteria from water. The feed water is pressurized to approximately 130 PSI forcing the water
molecules through the minute pores as purified water. Impurities in the water are generally too
large to pass through the pores and they are concentrated in the "reject" stream and flushed to
the drain. The RO membranes are capable of removing 90 - 99% of Total Dissolved Solids
(TDS), and up to 99% of organics, pyrogens and bacteria that may be in the feed water.

6
ES Series Layout

7
ES Series Standard Features
The ES Series of RO Systems is designed for light commercial use. Simplicity of design and the
use of industry standard components provide for reliable operation and easy serviceability. With
over 20 years experience in design and manufacture of water treatment solutions, the ES Series
RO System has provided dependable, cost-efficient water production to thousands of customers
and end users around the world.
ES Series Standard Features
• Thin Film Composite Membranes
• Industrial Painted Frames
• Stainless Steel Pump
• Heavy Duty FRP Pressure Vessels
• 5 Micron Sediment Pre-filter
• Manual Feed Water Shutoff Valve
• Product Water Check Valve
• Panel Mounted Instruments & Lights
• Automatic Inlet Valve
• Low Pressure Pump Shutoff
• Product, Reject & Recirculation Flow Indicators
• Feed & Product Water Sample Ports
• Poly Tubing & Fittings on Product Line
• Heavy Duty Concentrate & recirculation Control Valve
• Pretreatment Lockout
• Pre and Post Flush
• Factory Performance Tested

8
Recommended Operating Limits
The model number of your unit designates the system's daily production capacity. For example, a
model ES-600 will produce 600 gallons of water per day plus or minus 15%. This production is
based on a feed water temperature of 77 degrees F (25 degrees C), Total Dissolved Solids of
1000 ppm or less, turbidity of less than 1 NTU and a Silt Density Index (SDI) of less than 5.
Higher or lower water temperature will increase or decrease the product water output. Higher
TDS levels will decrease output production.
Complete equipment and operating specifications for the ES Series RO systems is included in the
Appendix.
Recommended RO Operating Limits
Water Pressure 40 to 90 PSI (275 to 620 kPa)
Total Dissolved Solids (TDS) 1000 PPM (mg/l)
Temperature 40° to 85° F (4.4° to 29.4° C)
pH
2 to 11
Hardness 51 PPM (3 grains per gallon)
Iron
0.2 PPM (mg/l)
Chlorine 0.0 PPM (zero)
Turbidity
1 NTU max.
SDI 5 max.

9
Installation
RO Unit Piping
Chlorine MUST be removed from the feedwater if present. Chlorine will
damage thin film composite membranes and void the warranty. If
activated carbon is used to remove chlorine, the carbon MUST be rinsed
to drain before the RO unit is operated.
RO Installation Requirements
1. The RO system and its components should be installed indoors whenever possible.
2. The system must be protected from freezing at all times. If shipped to warm climate (ambient
over 70°F) inspect for bacteria.
3. The site should allow for adequate ventilation in order to relieve heat buildup which can cause
weakening of fitting and plumbing connections.
4. The feed pressure should be at least 20 psi and no greater than 90 psi.
5. All pumps must be aligned to manufacturer’s specifications prior to initial pump startup.
6. The RO system will produce a sound level of approximately 80-90 decibels. The system should
be installed in a location where these sound levels will not be an issue.
7. Suitable drainage capable of removing the free discharge of the supply source. Drain
connections must be suitable for the disposal of concentrated saline, acid/alkaline chemicals, and
membrane preservatives or disinfectants.
Piping Assembly
Connect the feed, product, and reject lines to the RO unit using non-corrosive hose, pipe, or tubing.
Tubing for the product and reject connections are supplied with the unit.
The feed connection is located near the pre-filter cartridge housing. The product and reject
connections are located behind the instrument panel at the flowmeter connection. Refer to the
system layout drawings in the Appendix of this manual for the proper connection sizes.
For drain connections the use of an air gap to prevent possible back flow into the RO
unit is recommended.