R14-Wall Mount REVERSE OSMOSIS INSTALLATION AND OPERATION MANUAL

R14-Wall Mount REVERSE OSMOSIS INSTALLATION AND OPERATION MANUAL

A L A M O W A T E R R E F I N E R S

REVERSE OSMOSIS

INSTALLATION AND OPERATION MANUAL

R14-Wall Mount

Alamo Water Refiners, Inc.

13700 Hwy. 90 West

San Antonio, TX 78245

U.S.A. 210-677-8400 www.alamowater.com

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.

NOTES

Changes in operating variables are beyond the control Alamo Water Refiners, Inc. The end user is responsible for the safe operation of this equipment. The suitability of the product water for any specific application is the responsibility of the end user.

Successful long-term performance of a RO system depends on proper operation and maintenance of the system. This includes the initial system startup and operational startups and shutdowns.

Preventing fouling or scaling of the membranes is not only a matter of system design, but also a matter of proper operation. Record keeping and data normalization is 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 a 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 diagnosing and preventing system problems. For your reference, a typical log sheet is included in this manual.

TABLE OF CONTENTS

I. Introduction

A. Specifications

B. Overview

C. Pre-treatment

II. Controls, Indicators, and Components

A. Figure # 1 System Overview

III. Operation

A. Installation

Connections

Connections

D. Startup

E. Controls

F. Operation and Maintenance Log

Shooting

IV. Replacement Parts List

V. Membrane Replacement

VI. Appendix

Temperature Correction Factors

Electrical Schematic

I. INTRODUCTION

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.

The main system design parameters require the following:

Internal flows across the membrane surface must be high enough to prevent settling of fine suspended solids on the membrane surface.

The concentration of each dissolved ionic species must not exceed the limits of solubility anywhere in the system.

Pre-treatment must be sufficient to eliminate chemicals that would attack the membrane materials.

A. SPECIFICATIONS

Productivity

(Gallons per day / Gallons per minute)

Maximum production based on standard membranes and feed water of 25°C, SDI < 3, 1000 ppm

TDS, and pH 8. Individual membrane productivity may vary (± 15%).

Quality

(Typical Membrane Percent Rejection)

Based on membrane manufactures specifications, overall system percent rejection may be less.

Recovery with reject recycle (adjustable)

Membrane Size

3600 / 2.5

98 %

50 %

4 x 40

Number Of Membranes Per Vessel

Pressure Vessel Array

Number Of Membranes

Prefilter

(System ships with one 5 micron cartridge)

Feed Water Connection

Product Water Connection

Reject Water Connection

Feed Water Required

(Max)

Feed Water Pressure

(Minimum)

Drain Required

Electrical Requirement

115 VAC, 1-ph, 60 Hz (Other voltages available)

Motor

(Horse Power)

Dimensions L x W x H

(Inches)

Shipping Weight

(Estimated Pounds)

1

1:1

2

10" BB

1" NPT

1/2" Tube

1/2" Tube

9 gpm

10 psi

9 gpm

15 amps

1

48” x 60” x 23”

200

B. RO OVERVIEW

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. The impurities contained in the feed water are carried to drain by the reject water.

RO Membrane

Feed Water Product Water

Reject Water

C. PRETREATMENT

The RO feed water must be pretreated in order to prevent membrane damage and/or fouling.

Proper pretreatment is essential for reliable operation of any RO system.

Pretreatment requirements vary depending on the nature of the feed water. Pretreatment equipment is sold seperatly. The most common forms of pretreatment are described below.

Media Filter - Used to remove large suspended solids (sediment) from the feed water.

Backwashing the media removes the trapped particles. Backwash can be initiated by time or differential pressure.

Water Softener - Used to remove calcium and magnesium from the feed water in order to prevent hardness scaling. The potential for hardness scaling is predicted by the Langelier

Saturation Index (LSI). The LSI should be zero or negative throughout the unit unless approved anti-scalents are used. Softening is the preferred method of controlling hardness scale.

Carbon Filter - Used to remove chlorine and organics from the feed water. Free chlorine will cause rapid irreversible damage to the membranes.

The residual free chlorine present in most municipal water supplies will damage the thin film composite structure of the membranes used in this unit. Carbon filtration or sodium bisulfite injection should be used to completely remove the free chlorine residual.

Chemical Injection - Typically used to feed antiscalant, coagulant, or bisulfite into the feed water or to adjust the feed water pH.

Prefilter Cartridge - Used to remove smaller suspended solids and trap any particles that may be generated by the other pretreatment. The cartridge(s) should be replaced when the pressure drop across the housing increases 5 - 10 psig over the clean cartridge pressure drop.

The effect of suspended solids is measured by the silt density index (SDI) test. An SDI of five (5) or less is specified by most membrane manufacturers and three (3) or less is recommended.

Iron & Manganese - These foulants should be removed to less than 0.1 ppm. Special media filters and/or chemical treatment is commonly used. pH - The pH is often lowered to reduce the scaling potential.

Silica: Reported on the analysis as SiO2. Silica forms a coating on membrane surfaces when the concentration exceeds its solubility. Additionally, the solubility is highly pH and temperature dependent. Silica fouling can be prevented with chemical injection and/or reducing the recovery.

II. CONTROLS, INDICATORS, and COMPONENTS (see figure 1)

A. Controller - Controls the operation of the system.

B. Reject Control Valve - Controls the amount of reject flow.

C. Reject Recycle Control Valve – Controls the amount of recycle flow.

D. Prefilter Pressure Gauges - Indicates the inlet and outlet pressure of the prefilter. The difference between these two gauges is the prefilter differential pressure.

E. Pump Discharge Pressure Gauge - Indicates the pump discharge pressure.

F. Reject Flow Meter - Indicates the reject flow rate in gallons per minute (gpm

G. Product Flow Meter - Indicates the product flow rate in gallons per minute (gpm).

H. Prefilter Housing - Contains the RO prefilter.

I. Automatic Inlet Valve - Opens when pump is on and closes when the pump is off.

J. Low Pressure Switch - Sends a signal to the controller if the pump suction pressure is low.

K. RO Feed Pump - Pressurizes the RO feed water.

L. RO Membrane Vessels - Contains the RO membranes.

Figure 1

III. OPERATION

A. INSTALLATION

1. The water supply should be sufficient to provide a minimum of 20 psig pressure at the

2.

3.

4.

5.

Proper pretreatment must be determined and installed prior to the RO system.

A fused high voltage disconnect switch located within 10 feet of the unit is recommended. This disconnect is not provided with the RO system.

Responsibility for meeting local electrical and plumbing codes lies with the owner / operator.

Install indoors in an area protected from freezing. Space allowances for the removal of the membranes from the pressure vessels should be provided.

B. PLUMBING CONNECTIONS

Note: It is the responsibility of the end user to ensure that the installation is done according to

local codes and regulations.

1. Connect the pretreated feed water line to the inlet valve. (Figure # 1 item I) A feed water

2.

3. shutoff valve should be located within 10 feet of the system.

Temporarily connect the outlet of the product water flow meter to drain. (Figure # 1 item

G) The product water line should never be restricted. Membrane and/or system damage may occur if the product line is blocked.

Connect the outlet of the reject water flow meter to a drain. (Figure # 1 item F) The reject drain line should never be restricted. Membrane and/or system damage may occur if the reject drain line is blocked. An air gap must be located between the end of the drain line and the drain. The use of a standpipe or other open drain satisfies most state and local codes and allows for visual inspection and sampling.

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.

2.

Make sure the on off switch located on the controller is in the off position.

Wire the input power supply to the bottom of the contactor inside the controller. (See drawing in the appendix.) Make sure the voltage selector jumpers match the voltage you are suppling.

D. STARTUP

1. Verify that the pretreatment equipment is installed and working properly. Verify that no free chlorine is present in the feed water.

2. Verify that the on/off switch is in the off position.

3. Install a 10" five micron filter cartridge in the prefilter housing. (Figure #1 item H)

4. Open the reject control valve completely (Figure # 1 item B) by turning it counterclockwise.

5. Close the reject recycle control valve completely by turning it clockwise.

6. Open the feed water shutoff valve installed in step III-B-1 above.

7. Manually open the inlet solenoid valve (figure #1 item I) by turning the white lever located near the valve outlet.

8. Water will flow through the system and to drain through the reject flow meter (figure # 1 item F).

9. Manually close the inlet solenoid valve after the air has been purged from the system, or after

10 minutes, whichever occurs first.

10. Open the reject recycle valve two turns.

11. Move the controller on/off switch to the on position.

12. Adjust the reject control valves (figure # 1 items B & C) until the desired flows are achieved.

Closing the reject valve increases the product flow and decreases the reject flow. Opening the reject recycle valve decreases both the reject and product flow. See the flow rate guidelines and temperature correction table in the appendix to determine the flow rates for different operating temperatures.

13. Allow the product water to flow to drain for 30 minutes.

14. Turn off the system and connect the product line to the point of use. (Figure # 1 item G) The product water line should never be restricted. Membrane and/or system damage may occur if the product line is blocked.

15. Restart the system and record the initial operating data using the log sheet in the next section.

E. Controller

1. When the power switch is turned on, the pump will run as long as the circuit between the tank level terminals and the interlock terminals are closed, and the low-pressure switch contacts are open.

2. To install a tank level switch, remove the jumper wire from the terminal strip and connect the level switch to the terminals. The RO pump and inlet valve will turn on when the level switch contacts are closed (tank not full), and turn off if the level switch contacts open (tank full).

3. To install a pretreatment interlock, remove the jumper wire from the terminal strip and connect the normally closed pretreatment switch contacts to the terminals. The RO pump and inlet valve will turn on when the switch contacts are closed, and turn off if the switch contacts open.

4. If the low-pressure contacts close continuously for five (5) seconds, the RO pump and inlet valve will turn off and the low-pressure light will illuminate. The controller will automatically restart the unit after the user selected time delay. Turning the controller off then back on will manually reset a low-pressure shutdown.

Note: Use the plastic lever to push the terminal strip contacts open. Insert the bare end of the wire into the terminal and release the lever. The lever can be moved from one terminal to another as needed. One lever is included with each controller.

Automatic low pressure reset

If the unit shuts down due to low pressure, a red light on the front of the controller will illuminate. The controller will automatically restart the unit after a user selected time delay. The user selects the delay time by positioning a jumper cap inside the controller (see drawing in the appendix)

Tank Level / Pretreatment Indicator

If the unit shuts down due to a high product tank level or pretreatment interlock, an amber lamp will illuminate. The lamp will turn off and the unit will restart when the condition clears. The same lamp is used for both tank level and pretreatment interlock.

F. Operation and Maintenance Log

DATE PRODUCT

GPM

REJECT

GPM

PUMP

DISCHARGE

PRESSURE

REJECT

PRESSURE

FEED

TDS

PPM

PRODUCT

TDS

PPM

FEED

WATER

TEMP

FEED

WATER

HARDNESS

FEED WATER

CHLORINE

LEVEL

Note: Change the prefilter when the differential pressure increases by 5 - 10 psi over the clean differential pressure.

Clean the RO membranes when the product flow drops by 15% or more. (See appendix)

PRE

FILTER

INLET

PRESSURE

PRE

FILTER

OUTLET

PRESSURE

REMARKS

F. TROUBLESHOOTING

SYMPTOMS

Salt Passage Permeate Flow Pressure Drop

Normal to increased

Normal to increased

Increased

Normal to moderate increase

Decreased or moderately increased

Increased

Increased

Decreased

Increased

Increased to increased

Increased Normal to low

Normal

RO TROUBLE SHOOTING GUIDE

Decreased

Decreased

Decreased

Decreased

Location

to increased

Predominantly first stage to increased

Predominantly first stage to moderate

Can occur in any stage increase

All stages

Most severe in the first stage

Most severe in the first stage

At random

All stages

Possible Causes

Metal oxide

Colloidal fouling

Decreased Increased Predominantly last stage (CaSO

BaSO

4

4

, CaSO

, SiO

2

)

3

,

Biological fouling

Organic fouling

Chlorine oxidant attack

Abrasion of membrane by crystalline material

O-ring leaks, End or side seal glue leaks.

Conversion too high.

Verification

Analysis of metal ions in cleaning solution.

SDI measurement of feed/ X-ray diffraction analysis of cleaning sol.

Residue.

Analysis of metal ions in cleaning sol. Check LSI of reject. Calculate maximum solubility for

CaSO

4

SiO

2

, BaSO

4

,

in reject analysis.

Bacteria count in permeate and reject. Slime in pipes and vessels.

Destructive testing, e.g. IR reflection analysis.

Chlorine analysis of feed.

Destructive element test.

Microscopic solids analysis of feed. Destructive element test.

Probe test.

Vacuum test.

Colloidal material passage.

Check flows and pressures against design guidelines

Corrective Action

Improved pretreatment to remove metals.

Cleaning with acid cleaners.

Optimize pretreatment system for colloidal removal. Clean with high pH, anionic detergent formulation.

Increase acid addition and scale inhibitor for

CaSO

3

and CaSO

4

.

Reduce recovery.

Clean with an acid formulation for

CaCO

3

BaSO

4

, CaSO

.

4

and

Shock dosage of sodium bisulfite.

Continuous feed of low conc. Of bisulfite at reduced pH.

Formaldehyde sterilization. Clean with alkaline anionic surfactant. Chlorine dosage up-stream with subs. Dechlorination.

Replace cartridge filters.

Optimization of pretreatment system

(e.g. coagulation process.)

Resin/activated carbon treatment. Clean with high pH detergent.

Check chlorine feed equipment and dechlorination equipment.

Improved pretreatment. Check all filters for media leakage.

Replace O-rings.

Repair or replace elements.

Reduce conversion rate. Calibrate sensors.

Increase analysis and data collection.

MOTOR TROUBLE SHOOTING CHART

TROUBLE CAUSE

Motor fails to start Blown fuses Replace fuses with proper type and rating

Overload trips

Improper power supply

Open circuit in winding or control switch

Mechanical failure

Short circuited stator

Poor stator coil connection

Rotor defective

Motor may be overloaded

Check and rest overload in starter.

Check to see that power supplied agrees with motor nameplate and load factor.

Indicated by humming sound when switch is closed.

Check to see if motor and drive turn freely. Check bearing and lubrication.

Indicated by blown fuses. Motor must be rewound.

Remove end bells, locate with test lamp.

Look for broken bars or end ring.

Reduce load.

Motor Stalls One phase connection

Wrong application

Overload motor

Low motor voltage

Open circuit

Check lines for open phase.

Change type or size. Consult manufacturer.

Reduce load.

See that nameplate voltage is maintained. Check connection.

Fuses blown, check overload relay, stator and push buttons.

Check for loose connections to line, to fuses and to control.

Motor runs and then dies down

Motor does not come up to speed

Power failure

Not applied properly

Voltage too low at motor terminals because of line drop.

Broken rotor bars or loose rotor.

Motor takes too long to Open primary circuit accelerate Excess loading

Poor circuit

Defective squirrel cage rotor

Applied voltage too low

Wrong rotation

Motor overheats while running under load

Wrong sequence of phases

Consult supplier for proper type.

Use higher voltage on transformer terminals or reduce load. Check connections. Check conductors for proper size.

Look for cracks near the rings. A new rotor may be required as repairs are usually temporary.

Locate fault with testing device and repair.

Reduce load.

Check for high resistance.

Replace with new rotor.

Get power company to increase power tap. reverse connections at motor or at switchboard.

Overloaded

Frame or bracket vents may be clogged with dirt and prevent proper ventilation of motor.

Motor may have one phase open

Grounded could reduce load.

Open vent holes and check for a continuous stream of air from the motor.

Check to make sure that all leads are well connected.

Locate and repair. for faulty leads, connections and transformers.

Motor vibrates after correcting have been made motor misaligned

Weak support

Coupling out of balance

Driven equipment unbalanced

Defective ball bearing

Bearing not in line

Balancing weights shifted

Polyphase motor running single phase

Excessive end play

Realign

Strengthen base.

Balance coupling.

Rebalance driven equipment.

Replace bearing.

Line properly.

Rebalance motor.

Check for open circuit.

Adjust bearing or add washer.

MOTOR TROUBLE SHOOTING CHART (

CONTINUED

)

TROUBLE CAUSE

Unbalanced line current Unequal terminal volts Check leads and connections on polyphase motors during normal operation

Single phase operation Check for open contacts

Scraping noise

Fan striking insulation loose on bedplate

Clear fan.

Tighten holding bolts.

Noisy operation

Hot bearings general

Hot bearings ball

Airgap not uniform

Bent or sprung shaft

Excessive belt pull

Pulleys too far away

Pulley diameter too small

Misalignment

Insufficient grease

Deterioration of grease, or lubricant contaminated

Excess lubricant

Check and correct bracket fits or bearing.

Rebalance.

Straighten or replace shaft.

Decrease belt tension.

Move pulley closer to motor bearing.

Use larger pulleys.

Correct by realignment of drive.

Maintain proper quantity of grease in bearing.

Remove old grease, wash bearings thoroughly in kerosene and replace with new grease.

Reduce quantity of grease: bearing should not be more than ½ filled.

Check alignment, side and end thrust.

Replace bearing: first clean housing thoroughly.

Overloaded bearing

Broken ball or rough races

These instructions do not cover all details or variations in equipment nor provide for every possible condition to be met in connection with installation, operation or maintenance. Chart courtesy of Marathon Electric.

RO SYSTEM TROUBLE SHOOTING

PROBLEM REMEDY

High Product Water TDS

Membrane expanded.

Membrane attack by chlorine

Clogged pre-filter-creates pressure drop and low reject flow.

Feed pressure too low.

Insufficiently flushed post-filter cartridge.

Brine seal on membrane leaks.

No Product Water or Not Enough Product Water

Feed water shut off.

Low feed pressure. Feed pressure must be at least 20 psi.

Pre-filter cartridge clogged.

Membrane fouled.

Product check valve stuck.

Low pump discharge pressure

General

Replace membrane.

Carbon pre-filter may be exhausted. Replace with a new cartridge.

Replace pre-filter cartridge.

Feed pressure must be at least 20 psi.

Flush post-filter with pure water.

Determine if seal or o-ring is bad. Replace as needed.

Turn on feed water.

Consider booster pump.

Replace pre-filter cartridge.

Determine and correct cause; replace membrane.

Replace check valve fitting.

Open pump discharge valve, replace pump

IV. REPLACEMENT PARTS LIST

A list of common replacement parts is provided below Contact you dealer for replacement parts assistance.

Part Number

S7553A-D/T

Description

Pre filter housing 10" Big Blue

R9677-SV4040.1

R2451

R2452B

R5138

RO Membrane Pressure Vessels 4" x 40" SS

Pressure Gauge, 2", 0-100 psi, Dry

Pressure Gauge, 2 1/2", 0-400 psi, LF

Flow Meter 1-5 gpm

R2184-1.0

R2316-214B

K8013-24

S7828

Pump & Motor 1 HP Single Phase

Low Pressure Switch, 6.5 psi

Inlet Solenoid Valve, 1”, 24 volt coil

Filter Cartridge 5 micron 10” Big Blue

V. MEMBRANE REPLACEMENT

1. Turn off the system and close the feed water shutoff valve.

2. Disconnect the membrane feed hoses by loosing the brass fittings between the end of the hoses and the pressure vessel end caps.

3. Remove the retaining "U" pins from the pressure vessels.

4. Push the old membrane out of the vessel in the direction of the feed flow

5. Record the serial numbers of the new membranes.

6. Lightly lubricate the brine seals on the new membranes with clean water.

7. Install the new membranes in the direction of flow with the brine seal end going in last.

8. Lightly lubricate the end cap internal and external o-rings with glycerin.

9. Install the end caps and secure them with the "U" pins.

10. Install the membrane feed hoses.

11. Verify that all retaining "U" pins are installed.

12. Follow the start up procedure in section III-D.

Flow Direction

Membrane Brine Seal

VI. APPENDIX

Temperature Correction Factors

Deg C Deg F Correction Factor

30 86 1.16

29 84.2 1.13

28 82.4 1.09

27 80.6 1.06

26 78.8 1.03

25 77 1.00

24 75.2 0.97

23 73.4 0.94

22 71.6 0.92

21 69.8 0.89

20 68 0.86

19 66.2 0.84

18 64.4 0.81

17 62.6 0.79

16 60.8 0.77

15 59 0.74

14 57.2 0.72

13 55.4 0.70

12 53.6 0.68

11 51.8 0.66

10 50 0.64

9 48.2 0.62

8 46.4 0.61

7 44.6 0.59

6 42.8 0.57

5 41 0.55

Multiply the nominal product flow at 25° C by the temperature correction factor to determine the flow at various other temperatures.

To Pump

Power Input

Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement