User guide

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IOM-WQ-PWRO440

Table of Contents

I. Introduction

A. Speciﬁcations

B. RO Overview

C. Pre-treatment

II. Controls, Indicators, and Components

III. Operation

A. Installation

B. Plumbing Connections

C. Electrical

D. Startup

E. Control Function

F. Operation and Maintenance Log

G. Troubleshooting

IV. Replacement Parts List

V. Membrane Replacement

VI. Appendix

Temperature Correction Factors

PWRO4401

Installation, Operation

and Maintenance Manual

Reverse Osmosis System

Series PWRO440

Important

Please read the entire manual before proceeding with the

installation and startup:

• Donotusewherethewaterismicrobiologicallyunsafe.

• Alwaysturnofftheunit,shutoffthefeedwater,anddisconnect

the electrical power when working on the unit.

• Neverallowthepumptorundry.

• Neverstartthepumpwiththerejectvalveclosed.

• Neverallowtheunittofreezeoroperatewithafeedwater

temperature above 100°F (38°C).

Notes

ChangesinoperatingvariablesarebeyondthecontrolofWatts.The

enduserisresponsibleforthesafeoperationofthisequipment.

Thesuitabilityoftheproductwaterforanyspecicapplicationisthe

responsibilityoftheenduser.

Successfullong-termperformanceofanROsystemdependson

properoperationandmaintenanceofthesystem.Thisincludes

theinitialsystemstartupandoperationalstartupsandshutdowns.

Preventionoffoulingorscalingofthemembranesisnotonlyamat-

terofsystemdesign,butalsoamatterofproperoperation.Record

keepinganddatanormalizationarerequiredinordertoknowthe

actualsystemperformanceandtoenablecorrectivemeasureswhen

necessary.Completeandaccuraterecordsarealsorequiredincase

ofasystemperformancewarrantyclaim.

ChangesintheoperatingparametersofanROsystemcanbe

causedbychangesinthefeedwaterorcanbeasignoftrouble.

Maintaining an operation and maintenance log is crucial in diagnos-

ingandpreventingsystemproblems.Foryourreference,atypicallog

sheet is included in this manual.

PURE WATER

Note:Donotusewithwaterthatismicrobiologicallyunsafeor

ofunknownqualitywithoutadequatedisinfectionbeforeorafter

thesystem.

Summary of content (8 pages)

PAGE 1
IOM-WQ-PWRO440 Installation, Operation and Maintenance Manual Reverse Osmosis System Series PWRO440 PURE WATER Important Please read the entire manual before proceeding with the installation and startup: • Do not use where the water is microbiologically unsafe. • A lways turn off the unit, shut off the feed water, and disconnect the electrical power when working on the unit. • Never allow the pump to run dry. • Never start the pump with the reject valve closed.
PAGE 2
I. Introduction B. RO Overview The separation of dissolved solids and water using RO membranes is a pressure driven temperature dependent process. The membrane material is designed to be as permeable to water as possible, while maintaining the ability to reject dissolved solids. Reverse osmosis systems utilize semipermeable membrane elements to separate the feed water into two streams. The pressurized feed water is separated into purified (product) water and concentrate (reject) water.
PAGE 3
II. Controls, Indicators, and Components (See Figure 1) III. Operation A. Installation A On / Off Switch – Turns the unit on and off. 1. Proper pretreatment must be determined and installed prior to the RO system. B L ow-pressure indicator – Turns on when low pump inlet pressure is detected. 2. T he water supply and pretreatment equipment should be sufficient to provide a minimum of 10-psig at the maximum feed flow.
PAGE 4
D. Startup C. Electrical Note: It is the responsibility of the end user to ensure that the installation is done according to local codes and regulations. 1. V erify that the pretreatment equipment is installed and working properly. Verify that no free chlorine is present in the feed water. 1. M ake sure the on / off switch is in the off position (Figure # 1 item A). 2. Verify that the on / off switch is in the off position. 3. Verify that a filter cartridge is installed in the prefilter housing. 2.
PAGE 5
Product Gpm Reject Gpm Pump Discharge Pressure Feed Tds Ppm Product Tds Ppm Feed Water Temp Feed Water Hardness Note: Change the prefilter when the differential pressure increases by 5 - 10psi over the clean differential pressure. Clean the RO membrane(s) when the product flow drops by 15% or more. (See appendix) Date F.
PAGE 6
G. Troubleshooting RO Membrane Troubleshooting Guide SYMPTOMS Salt Passage Permeate Flow Normal to increased Decreased Normal to increased Decreased Increased Decreased Pressure Drop Location Possible Causes Normal to increased Predominantly first stage Normal to increased Predominantly first stage Metal oxide Increased Scaling (CaSO4, CaSO3, BaSO4, SiO2) Predominantly last stage Colloidal fouling Verification Corrective Action Analysis of metal ions in cleaning solution.
PAGE 7
IV. Replacement Parts List VI. Appendix A list of common replacement parts is provided below. Contact your Watts representative for replacement parts assistance. The following tables are intended as a guide to determining the flow rates for the PWRO440 Series RO systems. All flows are in gallons per minute (GPM) with 77°F feed water. Description Nominal flows for systems operating at 50% recovery with a feed water SDI < 1.
PAGE 8
LIMITED WARRANTY: Certain Watts Pure Water products come with a limited warranty from Watts Regulator Co. Other products may have no warranty or are covered by the original manufacturer’s warranty only. For specific product warranty information, please visit www.watts.com or the published literature that comes with your product. Any remedies stated in such warranties are exclusive and are the only remedies for breach of warranty.