OptiPure BWS350 Maintenance Manual

BWS350

Advanced Membrane

Separation System

Installation, Operation

& Maintenance Manual

Rev. 4

BWS350-iom-manual_v3.indd
©2018 Procam Controls, Inc. All Rights Reserved

Manufactured By:

OptiPure a Div. of

AQUION, Inc.

2605 Technology Drive, Bldg. 300

Plano, TX 75074

P: 972.881.9797 F: 972.422.6262

BWS350 System Installation, Operation & Maintenance 2

General Information

Safety Warning

Electrical work should be performed by a qualied

electrician in accordance with all applicable
codes and regulations.

Service Contact

For local maintenance and service information
please contact your nearest Authorized Service
Representative. Service inquiries may be directed
to technical support at:

OptiPure a div. of AQUION, Inc.
2605 Technology Dr. Bldg. 300
Plano, TX 75074 USA

Phone #: [phone]
Fax #: [phone]

E-mail correspondence to:
[e-mail]

Safety Instructions

1. Please read and follow these instructions
when connecting and using the system.

2. To avoid electrical shock, never touch the

inside of the electrical box. Only a qualied

technician should open the electrical box.

3. Never use the system if the power cord or

oat switch cable has been damaged. Do not

allow anything to rest on the power cord or

oat switch cable, and keep the cords away

from any place where people may trip over
them.

4. When disconnecting from the electric socket
hold the plug, not the cord.

5. If the processor does not function properly,
especially if there is an unusual sound or
smell coming from it, immediately unplug
the processor. Call your authorized service
representative.

Environmental Conditions

The BWS350 is certied to operate under the

following conditions:

1. Altitude up to 2000 m.

2. Ambient temperature of 40-105

3. Max relative humidity 80% at 88

4. Main supply voltage not to exceed +/- 10%.

5. Installation category II.

6. Pollution degree II.

7. Indoor use only, protect from elements.

Explanation of Symbols

The following symbols are used on the water
processor. The symbols and their explanation is
given below:

Earth ground:

°F (5 - 40°C).

°F (31°C).

6. Unplug the processor and RP pump from the
AC outlet prior to any service.

7. Locate the RP Assembly as close as possible
to an AC outlet.

8. Securely bolt processor to wall before
operating.

9. Avoid cross-connections and install on cold
water supply only.

10. Use approved Air-Gaps when connecting to
drain lines.

11. Do not exceed system pressure rating and
use water hammer arrestors when water
hammer is evident.

12. Turn off Feed-Water supply before lter or

membrane cartridge replacement.

WARNING: Hazardous Voltage:

BWS350 System Installation, Operation & Maintenance 3

Getting To Know Your System

The BWS350 Advanced Membrane Separation System is designed specically for users that desire the ability to customize

the TDS (Total Dissolved Solids) level or “Mineral Content” of the treated water. The BWS350 utilizes a precision multi-turn
Blending Valve to accomplish this with great accuracy. This system design maximizes the ability to accurately blend a calcu-

lated percentage of the ltered water with the product water exiting the AMS-QT Membrane, providing an Optimized Water to

your equipment with the characteristics that you desire.

Normal

Operation

120VAC or

Repressurization
Pump

Water Quality Indicator - Operates

momentarily, push purple button to turn on.

Push “IN” button for the TDS of the water

going into your equipment. Push “OUT”

button for the TDS of the puried water from

the membrane.

120VAC or 230VAC Power Cord

- Plug in to standard wall outlet.

Feed Water Inlet

3/8” Push-To-Connect -

Connect to Water Supply Valve.

Emergency Bypass Valve -

User can switch from Optimized

Water to Untreated Water

when needed, by turning handle

horizontal.

Reject Water Outlet - 1/4”

Push-to-Connect - Connect to drain

per local regulations.

CTO-Q (2x)

Pre-Filters

Repressurization
Pump

120VAC or 230VAC -

Plug in to
standard wall
outlet

Optimized Water To
Storage Tank - 3/8” Push-To-

Connect - Connect to Optimized
Water Storage Tank Inlet

1

2

Buffer Tank Valve

- Normally open (handle parallel to
valve body). Used to shut off water
supply to downstream equipment.

Buffer Tank

- Pre-charged air bladder - 20 psi

Absolute 0.2 micron
Hydrophobic Air-Breather/Filter

Blending Valve - Allows

precise adjustment of optimized
water TDS (mineral content).

3

4

Items in green circles show a nor-

mal operating condition/position.

Tank
Repressurization Return-

1/2” gray hose - Connect to
Repressurization Assembly Outlet

Operating Pressure Gauge

Shows feed pressure only when processor is
operating (when level in storage tank is low).

Sample Port -

3/8” Push-to-Connect - Used to ush pre
lters, gather a water sample, measure pro-

duction, or drain water from storage tank.

Reject Flow Control Valve

Pressurized
Optimized Water Outlet -

1/2” gray hose

-Connect to End User Equipment

AMS-QT Membrane
Cartridge

Membrane Reject Water
Tubing Connection

MA-Q15 Mineral
Cartridge

Low Level Relay & Control Box -

230VAC

- Plug in cord to standard wall outlet. Box

connected to LL Float Switch & Pump. Light on top
illuminates when there is water in tank & Pump is enabled.

Optimized
Water
Storage Tank

- 50 gal. Atmospheric

Repressurization Assembly
Outlet - 1/2” Hose Barb - Connect to

Pressurized Water Inlet on Processor

Optimized Water to Storage Tank
Inlet (on Valve)

- 3/8” Push-to-Connect - Connect to Opti­mized Water Outlet on Processor.

Tank Inlet Divert Valve

- Normally in Down position. Turn handle to Up
position to divert Optimized water to sample port.

High Level Float Switch (in Tank)
& Cable (on back or side of tank) - Connect

Cable to Processor “Tank Electrical Connection.”

Low Level Float Switch (in Tank)

- Shuts off pump (using Relay) when tank is empty.

Optimized Water Storage Tank

- 16 gal. Atmospheric

BWS350 System Installation, Operation & Maintenance 4

Installation Requirements

This section and the next provide the water, electrical
and space requirements for the BWS350. Pay

special attention to the feed-water chemistry
requirements. Operating a system on water supplies

outside of these parameters may lead to premature
membrane failure. This product is for commercial
use only and must be installed and maintained in
accordance with manufacturer’s guidelines and local
regulatory plumbing and electrical codes.

Operating parameters

Typical Membrane TDS* rejection:
97+%
Feed Temperature: 40 - 100° F (4 - 38° C)
Feed pressure: 50 - 80 psi

(3.4 - 5.9 bar) at 1 gpm
Production** (at 77°F, 60 psi)
350 gals/day,

14.6 gals/hr, 0.24 gpm
Recovery: up to 33%.

IMPORTANT NOTE: The nominal production rate

is strictly dependent on feed water temperature
and pressure. Reduced temperature or pressure
will reduce production. For example: Operating

pressure of 30 psi will cut production by 50%. 48˚F

feedwater will cut production by 50%.

Location

The system should be installed indoors, in the
proximity of the equipment (within 25 feet) and
protected from the elements. Do not let the processor
or storage tank freeze or be exposed to rain or direct
sunlight.

Post-treatment

Treated water stored in a tank may absorb organic
compounds from the tank, which can affect water
taste and odor. If product water is for consumption, an

optional post-treatment lter, such as an OptiPure
FX or QT carbon lter, should be installed after the

tank. If used, it is best installed as close to the point of
use as possible. Other specialized post-treatment is
also available.

Feed water connection

An adequate ow and pressure of water to the unit is

essential for successful operation. Provide a dedicated
1/2” water line to the vicinity of the installation. Install

a full-ow ball valve and pressure gauge with 1/2”

female pipe thread (user supplied) for connection to
installation hardware provided with the system. A 1/2”

*TDS (total dissolved solids) create conductivity in water and are
expressed in ppm or mg/l (parts per million or milligram per liter).
System Reject % depends on blended water setting.

**Nominal production @ 77°F (25°C) @ 500 ppm based on a 24
hr day. Actual production will vary based on variations in water
temperature, pressure, and TDS.

male pipe thread x 3/8” push-to-connect adapter is
included in the installation kit.

Drain

A drain should be located within 5 feet of the location

of the unit. Drain must allow a minimum ow of 2

gallons per minute. Compliance with most local
plumbing codes requires installation of an approved air
gap in the drain line. The drain connection should be
accessible for system set-up and service.

Electrical requirements

A power source with two outlets should be located
within 5 feet of the location of the unit.

Processor
RP Pump

120V, 6 Mz, 6 Watts or 230V, 50Hz 6 Watts

120V, 6 Mz, 2 Amps or 230V 50Hz 2 Amps

Feed-water chemistry

Feed TDS Up to 1200 ppm
Feed pH 6 - 10
Hardness 28 grains or less
Free chlorine <2 mg/l
Iron (Fe) 0.1 mg/l max.
Turbidity <0.05 NTU
Manganese 0.05 mg/l max.

Hydrogen sulde 0.0 mg/l

A water analysis must be conducted before installing
the system, or the information requested above can
be obtained from your local water utility. If your water
analysis shows that any of these parameters are not
within range, additional pretreatment and/or higher
frequency of maintenance may be required. Contact
your OptiPure distributor for assistance. The presence

of silica or occulants such as alum or cationic

polymers in the feedwater may cause membrane
fouling and may require special chemical pretreatment
or periodic membrane cleaning. Please note that
membrane failure due to fouling is not covered by the
warranty.

Storage Tank

The tank must be located within 10 feet of the water

processor unit. The oor beneath the storage tank

should be smooth, clean and free of sharp objects that
could puncture the bottom of the tank. Note: The tank

is atmospheric, with a sub-micron, hydrophobic air

breather lter.

Optimized Water Lines to Equipment

Tubing, piping and associated ttings connecting

Optimized water lines to equipment shoud be food
grade material that meets NSF Std 51 or 61 with a
minimum pressure rating of 75 PSI. Optimized water
may react with most metal piping imparting a bad
taste. Plastic pipe or reinforced opaque beverage
tubing are acceptable choices for Optimized water
distribution. The larger inside diameter tubing or hose,
the better to minimize pressure drop.

BWS350 System Installation, Operation & Maintenance 5

Equipment Dimensions

IMPORTANT - ALLOW A MINIMUM OF 24” IN FRONT OF THE PROCESSOR FOR MAINTENANCE AND SERVICE. DO NOT MOUNT
SYSTEM ABOVE THE CEILING OR IN A LOCATION THAT IS NOT EASILY ACCESSIBLE. WHEN THE 50 GAL. TANK ASSEMBLY IS
FULL OF OPTIMIZED WATER IT WILL WEIGH 450 LBS (THE 16 GAL. TANK, 140 LBS). ALWAYS LOCATE THE STORAGE TANK
WHERE IT CAN BE ACCESSED DURING SERVICE.

50 Gallon Tank
Repressurization Assembly

Processor
Left Side
View

Optional 175 Gallon Tank
with Repressurization Pump

Allow 3”
to remove
cartridges

Processor
Front View

16 Gallon Tank Repressurization Assembly

Right Side ViewFront View

BWS350 System Installation, Operation & Maintenance 6

Typical Installation with 50 Gal. Atmospheric Tank

Important: Plumbing should be performed by a qualied plumber in accordance with local codes.

Tank
Repressurization
Return

Operating

Pressure

Gauge

Power

120VAC or 230VAC, 2A

Tank High Level Float Switch Cable

Power Cord

Emergency

Bypass Valve

Processor

Water Quality
Monitor

Feed

Water

When installing, keep lines from the Repres­surization Assembly to the equipment as

short as possible to minimize pressure loss.

IMPORTANT - PROTECT PROCESSOR AND
REPRESSURIZATION ASSEMBLY FROM THE
ELEMENTS. DO NOT INSTALL IN DIRECT
SUNLIGHT OR WHERE EXPOSED TO FREEZ­ING TEMPERATURES OR RAIN.

Repressurization
Assembly

Air
Breather

User-Supplied

Water Supply
Valve &

Pressure Gauge

Buffer Tank Valve

(Normally Open)

Feed Water Line -

Green - from Water Supply
Valve to Feed Water Inlet

Repressurization
Assembly Outlet
(Hose Barb)

Feed Water

Reject

Water

Outlet

Optimized

Water

to Storage

Tank

Reject

Water

(to Drain)

Blending Valve

Inlet

-Set to req'd

TDS reading!

CTO-Q

Pre-Filter

1 32

Drain Line - Black -

from Reject Outlet to Drain

CTO-Q

Membrane Reject Water

AMS-QT

Pre-Filter

Tubing Connection

Sample
Port

Optimized
Water
Outlet
to Eqpt

Membrane Cartridge

MA-Q15

Mineral Cartridge

4

Repressurization

Pump

120VAC or 230VAC

Processor

Control High

Level Float

Switch

(inside tank)

Buffer
Tank

Low Level
Float Switch

(inside tank, with
Control Box at­tached to Buffer
Tank bracket)

Bypass

Pressurized Water Line

- 1/2" Gray Hose with hose barb inserts at both ends - from
Repressurization Assy Outlet to Storage Tank/RP Return

Optimized

Optimized
Water to
Storage Tank
Inlet (on valve)

Tank Inlet Divert Valve

(Valve normally in Down
position. Turn to Up position
to bypass Repressurization
Assy.)

Safety Float
Valve

(inside tank)

Water Line

- Blue - from
Optimized Water
Outlet to Tank Inlet

Optional
Carbon

Optimized Water
Storage Tank

- 50 gal. Atmospheric

Post­Treatment

with hose barb insert - Make connection to

distribution and (optional) post-treatment.

Optimized Water Line - 1/2" Gray Hose

Optimized
(Treated)
Water to
Equipment

BWS350 System Installation, Operation & Maintenance 7

Installation with 16 Gal. Storage Tank

Refer also to “Typical Installation” Diagram on previous page.

-to

Pressurized

Water Line

- connect to

Processor Tank

Repressurization

- Connect to

Processor Optimized

Water Outlet

Optimized Water

Line

High Level Switch Cable

-Connect to electrical box on

left side of Processor

Buffer Tank

Valve

(Normally Open)

Optimized

Storage Tank Inlet

Water to

(on Valve)

Repressurization

Assembly Outlet

(Hose Barb)

Plywood anchored to wall

Outside edge of
processor bracket

8.9”

12.7”

Bypass

Return

Buffer Tank

Air
Breather

Tank Inlet
Divert Valve

Repressurization
Pump

Optimized Water

Storage Tank

- 16 gal. Atmospheric

10.5”

120VAC or 230VAC

Power Cord

(without the cartridges) to mark the locations
for the screws. BE SURE TO ALLOW 3”
BELOW THE CARTRIDGES TO ALLOW FOR
REMOVAL. Screw the four bolts or screws in
place, leaving approximately 1/4” clearance
between the bottom of each bolt head and the
wall. Position the system over the mounting
bolts, and let the bracket slip down into the
keyholes. Tighten all screws.

Outlet

System Installation

Note: Do not install the cartridges in the
processor until completing this section.
Do not plug in the power cord from the RP
pump until completing the following section,
“System Start-Up”.

Refer to “Typical Installation” diagram on

page 6 and “How to Use Our Quick-Connect
Fittings” on page 20 when making the
following connections.

A feed water ball valve and pressure gauge (user
supplied) should be installed to provide water to
the system FEED WATER INLET with the green

tubing (supplied). Hose, tubing and ttings for

making connections between the processor,
storage tank and drain are supplied in the
installation kit.

14.7”

Wall Mounting

The processor should always be mounted where it
is well-supported, either using anchors in a cement
wall, or using the support of studs in a wall-board
wall. Never mount it directly to sheet-rock alone.
Instead, mount it on a sheet of plywood which is
anchored to the wall studs, as shown above.

Four user-supplied bolts or screws with a head

diameter of approximately 1/2” (which will t into the

keyholes in the system bracket, but will not slip out
when tightened) should be used to hang the system.

This will allow the unit to be lifted off the bolts, if
necessary for maintenance, without removing all
the bolts from the wall. Hold the processor in place

1. Remove the tank lid. Inside the tank, the oat

valve may be secured for shipping. Remove

any wrapping on the oat to allow it to hang

and move freely.

2. DRAIN: Connect the 1/4” black tubing from

the installation kit to the REJECT WATER
OUTLET on the processor. Run the line to
an appropriate drain. Observe local plumbing
codes and supply an appropriate air gap.

(Any ttings for connecting to the drain will

need to be supplied by the customer.) Fix
tubing in place at the drain.

3. FEED WATER: Apply 3 ‘wraps’ of Teon tape
to the 1/2” FPT x 3/8” push-connect tting
(supplied). Screw the tting into the Feed

Water Supply Ball Valve and tighten (DO
NOT OVERTIGHTEN). Connect one end

of the 3/8” GREEN TUBING to this tting.

Connect the other end of the tubing to the
FEED WATER INLET located on the left
side of the Processor. Cut the tubing to the
required length if necessary.

BWS350 System Installation, Operation & Maintenance 8

NOTE: When cutting the tubing use a sharp tubing
cutter or blade and make a clean, straight cut

before inserting into a push-connect tting. When

Buffer Tank
Valve

- Shown in the
normal positon

Repressur­ization Assy
Outlet

routing tubing, do not make sharp bends or crimp
the tubing.

4. PROCESSOR TO TANK: Connect a piece of
the 3/8” blue tubing to the OPTIMIZED WATER

TO STORAGE TANK tting on the processing

unit. Connect the other end of this tubing to the
OPTIMIZED WATER TO STORAGE TANK INLET
on the storage tank INLET DIVERT VALVE.

50 Gallon Storage Tank

Buffer Tank Valve

- Shown in the
normal positon

Repressurization
Assy Outlet

Optimized
Water Inlet

Tank Inlet Divert
Valve - Shown in
the normal positon

16 Gallon Storage Tank

Optimized
Water Inlet

Tank Inlet
Divert Valve­Shown in the
normal positon

5. REPRESSURIZATION ASSEMBLY TO
PROCESSOR: Using two of the 1/2” hose barb
inserts (supplied), a piece of 1/2” gray hose,
and two hose clamps, connect hose from the
REPRESSURIZATION ASSEMBLY OUTLET
on the Repressurization Assembly to the
TANK REPRESSURIZATION RETURN on the
Processor. The ridged end of a hose barb insert
goes into each end of the hose with a hose clamp
tightened onto it. The smooth ends of the hose

barb inserts go into the push-to-connect ttings on

the Processor and Repressurization Assembly.

6. Route the cable coming from the high level switch
to the electrical box on the processor. Connect
the AMP connector to the TANK ELECTRICAL
CONNECTION located on the grey electrical box.

7. OPTIMIZED WATER TO EQUIPMENT: Connect
a piece of 1/2” ID gray hose to the OPTIMIZED
WATER OUTLET on the processor with a 1/2”
hose barb insert and clamp (supplied). At a later
time, the other end of this line will be connected
to the distribution line that will deliver Optimized
Water to the equipment, but for now leave the line

loose and route the loose end of the gray hose into
a drain or bucket. (Make certain the hose length
will reach the storage tank; this will be required for
the Start-Up procedure.) Prepare any necessary

plumbing to make the connection between the
1/2” hose and the distribution line, which will be
completed in “Connect to Equipment”.

NOTE: If Post Filtration is used, it will be installed
between the Optimized Water Outlet and the
designated equipment.

Optional RP Assembly Location

The Repressurization Pump and Buffer Tank assembly
is on a stand that can be remote from the storage tank.
If this type of installation is required, the RP Assembly
should be built as a remote unit from the OptiPure,
with additional installation instructions supplied.

BWS350 System Installation, Operation & Maintenance 9

Install QT Cartridges

NOTE: Before installing the QT Cartridges, make sure
to remove the four plugs in the QT heads.

1. Insert the CTO-Q cartridges into QT heads 1 & 2
(starting from the left or inlet side of the processor)
and turn to align arrows.

2. Insert the AMS-QT membrane cartridge into the
QT head #3 and turn to align arrows.

3. Insert the MA-Q15 mineral cartridge into QT head
#4 and turn to align arrows.

4. Connect the Push-to-Connect elbow (remove plug
in elbow) on the end of the black Reject tubing to
the stem connector on the bottom of the AMS-QT
cartridge.

System Start-Up

Refer to illustrations “Typical Installation” (page 6) and
“High Level Switch Testing” (page 20).

IMPORTANT: Before proceeding, position the

Processor EMERGENCY BYPASS VALVE in the
“SERVICE” position, assure that the BUFFER TANK
VALVE is open, and position the TANK INLET DIVERT
VALVE in the down position (Blue Valve Handle
pointing sideways).

1. Slowly open the user-supplied WATER SUPPLY
VALVE. Plug the processor power cord into a

120VAC outlet. Allow the lter housings to ll, and
water will begin to ow from the end of the 1/4”

black tubing routed to the drain. After some time,

water will begin to ow into the tank. Allow several
minutes to ush the system until water ows

smoothly into the tank and also from the drain line.
Check all of the plumbing connections and correct
any leaks if necessary.

2. Test the high level oat switch. With the tank lid

removed and the system running, raise and tilt the

high level oat (in the tank). As you raise the oat
upward, the ball inside the oat will roll from one
end of the oat to the other, activating the switch.

• With the oat in the upright position, the water

processor should shut off the water ow.

• Lower the oat allowing the ball to drop back

down. The water should begin owing again.

3. The 16 Gal Storage Tank must be lled - or the 50

Gal Storage Tank lled approximately 1/3 of the

way - to start-up and purge the Repressurization
Assembly. You can quickly ll the storage tank

to the appropriate level using the “System
Bypass” on the processor. To do this:

• Route the 1/2” gray hose from the processor
OPTIMIZED WATER OUTLET TO EQUIPMENT
directly into the storage tank lid opening.

NOTE: Before performing the next step, be certain
to hold onto the gray hose.

• Turn the EMERGENCY BYPASS VALVE on the
processor to the “BYPASS” position. This will
allow feed water to bypass the processor and

quickly ll the storage tank.

• When the tank lls to approximately 14

gallons (or 1/3 full with the 50 gal. tank),
return the PROCESSOR EMERGENCY
BYPASS VALVE to the “SERVICE” position.

NOTE: Before performing the next step, be certain
to hold onto the gray hose.

4. Plug the power cord from the RP pump into the

outlet. Water should begin to ow rapidly from

the storage tank, through the RP assembly,
and back into the storage tank through the gray
hose. Allow the pump to recirculate the water for
several minutes until all the air is purged from the
Repressurization Assembly. As the air is purged,
the pump will begin to run more smoothly and

the water owing from the gray hose will become

steady.

5. Unplug the RP Pump cord.

Connect to Equipment

Refer to the illustration “Typical Installation” on page 6.

1. Remove the 1/2” gray hose that was routed
into the storage tank (from the Optimized Water
Outlet at the Processor) and make the connection
to the distribution line that delivers Optimized
Water to post-treatment (if used) and designated
equipment.

2. Ensure that any valves or solenoid valves on the
connected equipment are closed. Plug the RP

Pump back in. The pump will run and ll the Buffer

Tank until the pressure in the Buffer Tank reaches
70 psi, and then the RP Pump will shut off.

BWS350 System Installation, Operation & Maintenance 10

3. Open downstream valves at the equipment to

allow water to ow and air to purge through the

post-treatment (if used) and from the distribution
lines. When purging distribution lines the pump
may shut off if the water level in the storage tank
drops near the bottom of the tank. (Add more
water to the tank if necessary.) Once distribution

lines are ushed and all air is purged, close the

equipment valves. When there is no demand for

water the buffer tank will ll and the pump will shut

off automatically.

4. Before proceeding to “System Blend Adjustment,”
follow these steps to empty the tank of untreated
feed water:

• Connect a piece of 3/8” blue tubing into the

push-to-connect tting of the SAMPLE PORT

VALVE on the right side of the processor, and
route the other end of the tubing into a drain or
bucket.

• Open the Sample Port Valve to drain water

from the storage tank. When the pump shuts off
due to a low water level, close the Sample Port
Valve.

5. Replace and tighten the lid onto the storage tank.

2. Push the purple “POWER” button on the Water
Quality Monitor located on the upper left corner.
It will immediately display the “IN” or Optimized
Water - TDS (Total Dissolved Solids) in PPM (parts
per million). By adjusting the blend valve you are
able to change the “IN” TDS to the desired Target
Range.

3. Within 30 seconds, push the “OUT” button to
display the Permeate Water TDS (from the RO
membrane).

4. If the “IN” TDS is outside of the desired range:

• Turn the Blending Valve knob counter-clockwise
to open the Blending Valve, increasing the
amount of Filtered Water blending with the
RO water, thereby increasing the TDS of the
Optimized Water.

• Turn the Blending Valve know clockwise to close
the Blending Valve, decreasing the amount
of Filtered Water blending with the RO water,
thereby decreasing the TDS of the Optimized
Water.

5. Once the desired TDS is obtained allow the
system to run for several minutes, periodically
checking the “IN” TDS. Make smaller incremental
adjustments as necessary until the TDS “Target” is
achieved.

System Blend Adjustment

IMPORTANT: The TDS Blend must be properly
adjusted before operating the connected
equipment. If you do not know the “TARGET TDS”

SET THE BLEND “IN” between 60 and 80. The

owner/operator should consult with their OptiPure
Dealer or contact the OptiPure factory for assistance in
determining an appropriate TDS Target Range.

An improper TDS Blend setting or failure to
properly maintain the system can cause damage
to equipment. Factors that can impact the TDS of the

Optimized Water include changes in water pressure
and temperature, seasonal changes in water quality,
and municipal source blending practices. To assure
maintaining your target TDS range year-round we
recommend periodically checking the “IN” TDS and
making adjustments as needed.

Optimized Water TDS - Blending Adjustment

1. Allow the system to operate for at least 5 minutes
before continuing to Step 2.

Complete the Installation

Transition to Owner/Operator

The FINAL STEP is to meet with the Owner/Operator,
familiarize them with the system and complete the

Post-Installation Check List.

The system is now in “normal operating” mode and

the storage tank will ll with Optimized Water from

the Processor. Complete the “Post Installation
Checklist” to Conrm Normal Operation and
System Settings.

Allow the storage tank to ll before beginning

operation of the connected equipment.

BWS350 System Installation, Operation & Maintenance 11

Repressurization Pump

The Repressurization Pump Assembly that comes
standard with the BWS350 System includes a dia­phragm pump controlled by an internal Pressure
Switch, and a Buffer Tank between the Pump and the
downstream equipment maintains downstream pres­sure. Water demand for downstream equipment is
directly supplied from the Buffer Tank, and demand
can go on and off as necessary. The RP Pump is not
directly affected by downstream demand, and down­stream equipment is also not affected by the automatic
starting or stopping of the RP Pump. When the pres-

sure drops sufciently in the Buffer Tank, the pump

starts automatically repressurizes the Buffer Tank.
The operating pressure for the RP Pump is preset (to

70 psi) and is NOT eld adjustable.

The pump also incorporates check valves to keep the
Buffer Tank and downstream line pressurized. The
pump is equipped with auto-reset, thermal overload
protection and is designed for intermittent duty.

If the pump runs erratically, allow the pump to run
to open drain with valve fully open to purge air
from the pump head. Disconnect the power and
reconnect several times to facilitate air purging.

The pump will prime only if all the pressure is relieved
from the outlet port. The pump is self-priming up to
11 ft. The pump can run dry but will overheat and the
pump overload will shut the pump off.

Storage Tank Level Controls

(See also the Electrical Schematic at the end of this
manual.) For system control, there are independent
High and Low Water Level Float Switches in the
Storage Tank. When the Storage Tank becomes full,
the High Level Float Switch shuts off the Processor,

preventing ow to the Tank.

If the tank is empty, the Low Level Float Switch auto­matically shuts off the RP
Pump. As long as the power
cord from the Tank/RP unit
is plugged in, and there is a
minimal amount of water in
the Storage Tank, the green
light is illuminated on the
Control Box (attached to the
Buffer Tank bracket), indicat­ing that power is supplied
to the RP Pump. This light
means the RP unit is en­abled, even though the RP
Pump may be automatically
turned off when the Buf­fer Tank is pressurized and
operation of the Pump is not
needed.

Low Level Float Switch
Indicator light

BWS350 System Installation, Operation & Maintenance 12

BWS350 Processor Components

Sample Port
Valve -

PN: 520-12223

Pressure Gauge -

PN: 530-20018

Pressurized
Water Check
Valve -

PN: 524-01035

Blue Tubing -

Optimized Water Line
PN: 580-00110

Permeate
Check Valve -

PN: 524-01030

Solenoid Valve -

PN: 714-10005

Red Tubing -

Bypass Water Line
PN: 580-00104

Water Quality Monitor -

PN: 530-40112

Electrical Box -

w/Tank Connection

Bypass Valve -

PN: 520-12230

Green Tubing -

Filtered Water Line
PN: 580-00111

Reject Flow
Control -

PN: 514-00440

Blending Valve -

PN: 514-00442

Black Tubing -

Reject Water Line
PN: 580-00106

AMS-QT Cartridge -

PN: 204-53040

CTO-Q PreFilters (x2) -

PN: 300-05830

Stem Connector -

PN: 551-65210

MA-Q15 Cartridge -

PN: 300-05855

Union Elbow -

PN: 551-63021

BWS350 System Installation, Operation & Maintenance 13

Tank/RP Components

50 Gallon Storage Tank Shown.

Buffer Tank -

For 16G Storage Tank - PN: 340-50001
For 50G Storage Tank - PN: 340-50004

Low Level
Control Relay -

(in Control Box)
PN: 740-01290

Buffer Tank Valve -

PN: 520-14501

Tank Bracket -

For 16G Storage Tank ­PN: 594-80516
For 50G Storage Tank ­PN: 594-80510

RP Pump -

PN: 704-35513

Air Breather -

PN: 300-40005

Tank Inlet Divert Valve -

PN: 520-12225
In normal operation, handle should be
down (horizontal). For measuring water
production or purging air from system,
turn Divert Valve handle up.

High Level Float Switch -

(inside tank)
PN: 740-01120
Controls Processor. When

tank is full, oat switch is in up
positon and switch inside oat

is open, causing Processor to
shut off.

Float Valve -

(inside tank
beneath inlet)

PN: 520-01203

Bypass
Check Valve-

PN: 524-01030

RP Assy
Outlet -

1/2” Hose Barb
Insert,
PN: 550-08730
Connect to
equipment inlet.

Optimized Water Inlet -

Connect line from Optimized
Water Outlet

Foot Valve -

(inside tank, at
base of pump
suction tube)
PN: 520-10221

Low Level
Float Switch -

(inside tank)
PN: 740-01116

16 Gal Storage Tank -

PN: 570-00016

50 Gal Storage Tank -

PN: 570-00056

(50 Gal Tank shown.)

BWS350 System Installation, Operation & Maintenance 14

Product/Reject Flow Rate Adjustments

Introduction

The AMS-QT Reverse Osmosis membrane uses

pressure to allow pure water molecules to lter through

its semipermeable membrane separating pure water
from dissolved solids (salts) and other contaminants.
In essence the membrane splits feed water into two
separate streams. One stream is the water produced
for use (product or pure water), and the other

contains the salts and contaminants ltered out by

the membrane (reject) carried away to the drain. The
OptiPure BWS350 is designed to produce water at
a 30% recovery rate which means it uses water at a
ratio two gallons of reject water for each gallon of pure
water produced. This is a Product/Reject Ratio of
1:2.

The “pure water” produced by the membrane is
not always appropriate for use with food service
equipment. The BWS350 system also allows

blending ltered water with the pure water to produce

Optimized Water which can be adjusted to provide
the ideal characteristics for foodservice equipment
applications. Instructions for blending Optimized water
are on page 10.

Each system is adjusted at the factory for the
proper operating parameters.

In most cases the factory setting should not be
changed. However, due to certain conditions an

adjustment may produce better operating efciency

and membrane performance. Conditions that can

inuence the best Product/Reject Flow Rate Ratio

include feed water quality (TDS level, Turbidity and

specic contaminants such as iron and silica) along

with water temperature and water pressure. The

determination of whether to make a Product/Reject
Flow Rate adjustment is complex. An understanding
of your water chemistry and operating conditions in
necessary in order to safely deviate from the factory
setting. It is strongly recommended that you

contact your OptiPure dealer or the factory for
assistance before changing the factory setting.

Reject Flow Rate Adjustment
The parameter that can be adjusted is the Reject
Flow Rate. This is the amount of water used to carry

away the impurities rejected by the membrane. It
is critical that both the Product Flow Rate and the

Reject Flow Rate are measured to conrm the desired

Product/Reject Ration has been achieved. The higher

the ratio of product to reject ow rate, the shorter the

life of the membrane will be.

IMPORTANT: Never close the Reject Flow Control

Valve, and never adjust it such that the Reject ow
rate is less than the Permeate (Product) ow rate!

This will cause premature fouling and shorten
membrane life.

To adjust the reject ow rate, locate the reject ow

control valve. Loosen the lock-nut (at the base of the
valve stem) just slightly.

IMPORTANT: Before adjusting Reject Flow Rate
CLOSE the BLENDING VALVE.

To increase the reject ow rate, use a slot screw driver

to turn the valve stem counterclockwise. To reduce the

reject ow rate, turn it clockwise. A minor adjustment
makes a big difference in the ow rate so begin with

Reject Flow Control

Adjust with Blend Valve Closed

BWS350 System Installation, Operation & Maintenance 15

Operating Parameters

Ratio Oper
Product/ Temp PRODUCT FLOW RATE REJECT FLOW RATE
Reject (°F) (gal/day) (gpm) (L/day) (lpm) (gal/day) (gpm) (L/day) (lpm)

1:2 50 185 0.13 701 0.49
1:2 64 271 0.19 1027 0.71
1:2 77 350 0.24 1325 0.92 700 0.48 2650 1.84
1:2 84 380 0.26 1440 1.00

• The ow rates above are for 60 psi feed pressure.

• To convert gallons per minute (gpm) to ounces per minute, multiply gpm by 128.

• To convert gallons per minute (gpm) to milliliters per minute, multiply gpm by 3785.

small (1/2 turn) adjustments. After making an

adjustment, measure the reject and product water ow

rates. Make additional adjustments until the desired
Product/Reject Ratio is achieved, then tighten the lock­nut.

Use the “Operating Parameters” table above as a

guideline for safe operating ow rates and ratios. This

table provides an indication as to how Feed Water
temperature affects the Product Water output of the
system.

Measuring Product Flow Rate

Connect a piece of 3/8” tubing to the Sample Port on
the right side of the Processor and route it to a bucket
or drain. If the tank is full, turn the Sample Port valve
to the sample position and allow about 20 gallons to
drain out of the storage tank, then close the Sample
Port valve. Close the Buffer Tank Valve and turn the
Tank Inlet Divert Valve to the divert position (Up). Open
the Sample Port valve. While the system is operating
in normal mode (Emergency Bypass Valve in Service
position), use a graduated cylinder or other measuring
vessel to collect and measure the amount of water that
is produced (from the tubing connected to the Sample
Port) in 60 seconds. To convert ounces per minute to
gallons per day, multiply ounces/mn by 11.25.

When nished, close the Sample Port valve, turn the

Tank Inlet Divert Valve to the Down position, and open
the Buffer Tank Valve.

Measuring Reject Flow Rate

Access the Reject Drain Line and perform the same

procedure described in “measuring product ow rate.”

the Blending Valve closed based on 60 psi Operating
Pressure and 77°F which is typically 919 ml per minute
+/- 15%. Never close Reject Flow Control Valve nor

limit Reject ow to less than Permeate ow!

The AMS-QT membrane is rated for a target daily
output of 350 gallons per day of Product Water
when the feed water temperature is 77°F and the
operating pressure is 60 psi. Do not exceed the
rated output of 350 gpd/14.58 gph/0.243 gpm (1,325
liters per day/55.125 liters per hour/919 milliliters
per minute). Always keep in mind that feed water
temperature and pressure will affect the Product

Water output. Depending on feed water pressure
and temperature it may not be possible to achieve
the rated production of 350 gpd.

Blending Impact on Product/Reject Ratio

Once the Blending Valve is opened to blend Filtered
Water with the RO Product Water the combined

Optimized Water ow rate will be greater than the

Product Flow Rate. For example, if the Feed Water
TDS is 300 ppm, the AMS-QT product water TDS will
be 9 -15 ppm. If your desired Optimized Water TDS
is 75 ppm, then you will be adding approximately
13% of the Filtered Water to your RO product water,

increasing your Optimized Water ow to a 42%

recovery.

In this example your daily Optimized Water Production
is approximately 441 gpd at 77°F Feed Water
temperature and 60 psi Operating Pressure.

Limitations on Adjustment of Reject Flow Rate

The factory sets the Product/Reject Ratio to 1:2 with

BWS350 System Installation, Operation & Maintenance 16

Routine Maintenance

Emergency

Bypass Valve

CTO-Q Pre-Filters
PN: 300-05830
Change Every 3 to 6 months

Normally, the most frequent routine maintenance
required on the system is periodic replacement of

the carbon/sediment pre-lters and the optional post-

treatment cartridge. The CTO-Q cartridges should
be changed every 3-6 months depending on water
usage. In areas with high levels of sediment and other
contaminants the CTO-Q cartridges may require more
frequent changes.

Pre-Filter change procedure

1. Unplug the RP Pump power cord.

2. Either close the Water Supply Valve (shutting off

all water ow), or put the Emergency Bypass Valve

(on the Processor) in the System Bypass position

(allowing untreated water to continue to ow to the

equipment).

3. Wait a moment for system pressure to drain off.

4. Once the system pressure has been relieved,
remove the two CTO-Q cartridges by turning a
quarter-turn to the left and pulling down on the
cartridge.

5. Install the new CTO-Q cartridges into the QT
heads by aligning the notches and pushing up,
then turn a quarter-turn to the right.

6. Install a piece of 3/8” tubing in the Processor
Sample Port valve, open the Sample Port, and
direct to a bucket or drain.

AMS-QT Cartridge ­PN: 204-53040

Sample Port-

For Testing,

Priming and

Sampling ONLY.

MA-QT15

PN:300-05855

Change Every

7. Turn the Tank Inlet Divert Valve to the Bypass
Mode (Handle Pointing UP).

8. Open the Water Supply Valve and put the
Emergency Bypass Valve in the “SERVICE”
position, allowing water to run into the new Pre­Filter cartridges and purge air through the system
and out the Sample/Flush Port to drain.

9. Once the air has been purged and lters ushed,

close the Sample Port valve and return the Tank
Inlet Divert Valve to the Normal position (handle
horizontal or down).

10. Check for leaks.

11. Plug in the RP Pump power cord.

Optional Post-treatment cartridge change
procedure (if applicable)

1. Close the ball valve at the inlet to the Post­Treatment assembly.

2. Remove the existing cartridge and discard.

3. Install the new cartridge.

6 months

4. Open the ball valve and the RP pump should

actuate lling the housing with water.

AMS-QT Replacement

The AMS-QT membrane is a high-efciency, low-

fouling reverse osmosis membrane that will provide
product water with >97% rejection of the Feed Water.
The life of the membrane will vary depending on Feed
Water quality, usage, and Pre-Filter maintenance.
Typical membrane life is 12 to 18 months, but with rou­tine scheduled Pre-Filter replacement, and no adverse
Feed Water conditions, the AMS-QT membrane may
last 2-5 years.

1. Unplug the RP Pump power cord.

2. Either close the Water Supply Valve (shutting off

all water ow), or put the Emergency Bypass Valve

(on the Processor) in the System Bypass position

(allowing untreated water to continue to ow to the

equipment).

3. Place a bucket or other similar catch basin under
the AMS-QT. Remove the black reject line from
the push-to-connect elbow on the bottom of the
membrane. (Refer to “Push-to-Connect Fittings”
on page 20.) Allow the membrane and reject line
to drain into the bucket.

4. Remove the AMS-QT cartridge from the head by
turning the cartridge a quarter-turn to the left and
pulling down on the cartridge.

5. With a wrench, remove the push-to-connect elbow
and stem adapter attached to the bottom of the
AMS-QT cartridge. Remove the residual Tef-

BWS350 System Installation, Operation & Maintenance 17

Routine Maintenance, Continued

lon tape from the male 1/8” threads on the stem
adapter.

6. Wrap the 1/8” male thread on the stem adapter

with 2 wraps of Teon tape and re-install in the

bottom of the new AMS-QT cartridge.

7. Align the taps on the AMS-QT cartridge with
the QT head and insert into the head and turn a
quarter-turn to the right.

8. Insert the black reject line into the push-to-connect
elbow on the bottom of the AMS-QT cartridge.

9. Install a piece of 3/8” tubing in the Processor
Sample Port valve, open the Sample Port, and
direct to a bucket or drain. Turn the Tank Inlet
Divert Valve to the Bypass or UP position. Open
the Water Supply Valve and put the Emergency
Bypass Valve in the “SERVICE” position. Allow

water to ush through the membrane, displacing
air and preservative, to ow out the Sample/Flush

port to drain for 5-10 minutes.

10. Actuate the Water Quality Monitor and check the
“OUT” or Permeate Water TDS.

11. After the AMS-QT cartridge is purged of air, close
the Sample Port.

12. Check for leaks.

13. Plug in the RP Pump power cord.

Storage Tank Cleaning

If the Storage Tank becomes dirty, regular cleaning
and sanitization may be required. (Request a Storage
Tank Cleaning Guide from OptiPure.) The Tank can be

emptied for cleaning by doing the following:

1. Close the Water Supply Valve

2. Connect 3/8” tubing from the Sample Port on the
Processor to the drain.

3. Open the Sample Port. The RP Pump should op­erate, pumping water to the drain until the Tank is
nearly empty.

4. Unplug the RP Pump power cord.

5. When nished, close Sample Port, plug in RP

Pump, and open Water Supply Valve.

RP Pump Motor Brushes

Over time or with heavy usage, the motor brushes in
the RP Pump can become worn, causing the Pump to
no longer operate reliably. (See “RP Pump Does Not
Turn On” under Trouble-Shooting for symptoms.) For
a system with heavy usage, it may be necessary to re­place motor brushes under a preventive maintenance
schedule, such as annually. To restore a Pump with
worn brushes, order and install Brush Kit 704-39905,
which is supplied with instructions.

Buffer Tank Pre-Charge Pressure

Very slowly over time, the air pre-charge in the RP As­sembly Buffer Tank can diminish, reducing the ability
of the Buffer Tank to maintain downstream pressure.
Annually, the pre-charge should be checked using a
tire gauge on the valve, which is on the side or bottom
of the Buffer Tank. If it is lower than 20 psi, air should
be added to restore it to 20 psi.

Trouble-Shooting

Problem Possible Cause Resolution

Running out of water. Valves in incorrect operating position

No power to RP Pump
Operating Pressure reduced
Very cold Feed Water temperature

Low Feed Water Pressure
Demand exceeds system capacity
High Level Float Switch Open

Poor water quality. Blend Valve mis-adjusted

Membrane failure

Short AMS-QT membrane
life.

Short Pre-Filter life Heavy sediment loading Add FXAF01-12 or -12B for added Pre-Filter protection

Processor Either Does Not
Shut Off or Turn On

Product/Reject Ratio mis-adjusted
Poor Feed Water quality, presence of

iron, silica or non-calcium carbonate
hardness

High Level Float Switch or Solenoid
Valve not functioning

Ensure the Processor Bypass Valve is in Service position, the Repressuriza­tion Assy (RP) Tank Divert Valve is in Down position, & Buffer Tank Valve is
Open (handle parallel to valve body).

See “RP Pump Does Not Turn On”
Pre-Filters need to be replaced
Raise water temp to increase production or determine if higher capacity

system is required
Install optional Feed Water Pressure Booster Pump
Determine if the demand is unusual or inconsistent, or resize system
Remove Storage Tank lid and actuate Float Switch up and down

Follow steps to adjust Blending Valve on Page 10
Replace AMS-QT membrane

Measure and adjust the Reject Flow Rate per Page 15-16
Determine Feed Water quality by obtaining a water quality report from city

water supply utility or contact your OptiPure dealer

Remove Storage Tank lid and actuate Float Switch up and down.
Replace High Level Float Switch or Solenoid Valve

BWS350 System Installation, Operation & Maintenance 18

Trouble-Shooting, Continued

Water Quality Monitor will
not turn on

RP Pump
Does Not Turn On

Dead batteries Replace batteries by sliding Water Quality Monitor up and removing the six

screws on the back cover. Remove cover to access battteries.

No power to Pump (Green LED Off
at top of Control Box - attached to
Buffer Tank bracket)

If LED is On, RP Pump is operational (Pump will turn on only when the Buf­fer Tank is empty). If LED is Off, ensure power cord is plugged into an outlet
with power (check circuit breaker), & that there is water in Tank. If LED will
not turn On (with power & water in tank), there may be a problem with Low
Level Float Switch or Relay.

Low water level in Tank (Green LED
on Control Box is Off)

RP Pump motor brushes worn

Allow Processor to partially ll Tank with water. Green LED indicates RP

Pump is operational, & will turn on when Buffer Tank is empty.

Try bumping the RP Pump with your hand. If it turns on temporarily, the
brushes are probably worn. Order & install Brush Kit 704-39905.

RP Pump damaged

(Green LED is On, Buffer Tank is empty) If bumping RP Pump yields no
response, Pump could be damaged or brushes may still be worn. Call for
service.

RP Pump runs
intermittently or rough.

RP Pump cycles on-off
frequently

Air trapped in pump head.

RP Pump motor brushes worn

Low air pre-charge in Buffer Tank
(possible on aged system)

Unplug pump temporarily and open downstream valve to empty Buffer Tank.

See “RP Pump motor brushes worn” above.

Empty Buffer Tank and re-charge air pressure to 20 psi.

Electrical Schematic, Low Level Float Switch / RP Pump Circuit

Indicator Lamp

(Illuminated when pump is armed and tank has water in it)

AC

D

F

E

B

A

C

Relay

Heat Sink – Aluminum

1.6"x4.6"x0.125"Thick

RP Pump

4.8 SFA

Low Level

Float Switch

BWS350 System Installation, Operation & Maintenance 19

How to Use Our Push-to-Connect Fittings

Fitting Overview

Fitting Body

Collet/Gripper
(Dark Gray)

To Attach Tubing:

To ease insertion, moisten end of tubing with fresh
water or 3% hydrogen peroxide solution.

Push tubing straight in.

2

Resistance will be felt when the
tubing meets the O ring.

Tubing Preparation

The outside of the tubing must be
free of knicks and gouges.

Cutaway view of tting and tubing

1

Keep pushing until the
resistance is overcome
and the tubing rests
against the stop.

Cut tubing with a plastic tubing cutter or a
razor knife. Make a clean, square cut.

After cutting, make sure the end of the tube is
round. Correct any out of roundness that may have
occured in cutting the tubing.

Tube Stop
O-Ring

3

To Remove Tubing:

Press collet in to release grippers. While holding the collet
in, pull out on the tubing.

It may be necessary to use a partially open crescent wrench
or similar device to hold both sides of the collet in while
pulling the tubing out.

High Level Switch Testing

Switch Test:
Float UP,
Processor OFF

Float DOWN,
Processor ON