BLS 9000 Optimum User manual

Installation, Operation, and Maintenance Manual
BLS 9000 Optimum
REVERSE OSMOSIS SYSTEM
JUNE 2022

Table of Contents
3. BLS Reverse Osmosis System Introduction
3. How Reverse Osmosis Works
3. Definitions
3. Factors Affecting System Operation and
Performance
4. Getting to Know Your BLS RO System
4. Major Components Parts List
5. System Specifications
5. System Operation Specifications
5. Feed Water Parameters
5. Dimensions and Weight
5. Service Connections
5. Design Test Conditions
6. System Installation Instructions
8. S-150 RO Controller Guide
8. Controller Introduction
8. Controller Specifications
8. Front Panel Controls and Indicators
9. Terminal Strip, Jumper, and Adjustment
Locations
9. Power Wiring
9. Pump and Relay Outputs
9. RO Pump Wiring
9. Inlet and Flush Solenoid Wiring
9. TDS/Conductivity Cell Wiring
9. Switch Inputs
10. I/O Expander Board (Optional)
11. Change or Display Setpoints
11. System Operation
11. Display
11. Operating Status Message
12. TDS/Conductivity
12. Operating Hours
12. Warning Messages
12. Tank Full Operation
12. Tank Full Restart
12. Tank Full Override
12. Pressure Fault
12. Auto Reset
12. Alarm Silence
12. Pretreat
13. Membrane Flush
13. High TDS/Conductivity Warning/Alarm
13. Operating Hours Exceeded
13. I/O Expander (Optional)
14. Controller Adjustments
14. TDS/Conductivity Expander (Optional)
15. Troubleshooting
16. S-150 RO Controller Setpoints
17. System Startup Procedure
19. Filter Cartridge Installation & Replacement
20. System Pressure Switches
20. Inlet Low Pressure Switch
20. Product Water Pressure Switch (Optional)
21. Servicing the Membrane Element(s)
21. Membrane Element Replacement
22. Sanitizing the RO System
22. Membrane Flush
23. Replacement Parts List
24. BLS System Troubleshooting
25. Flow Diagram & Electrical Schematics
29. System Log

Page 3
BLS Reverse Osmosis System
Introduction
Your BLS Reverse Osmosis System has been designed to
produce quality water for a variety of applications. We are
condent that you will nd BLS Systems provide quick and
simple installation, hassle-free maintenance, and years of
reliable and trouble-free operation.
BLS RO Systems incorporate years of engineering
experience, dedicated workmanship, and quality
manufactured components. Each system is built with pride
and is factory tested for superior performance.
As with all products, the customer has the responsibility to
ensure that the BLS RO System is operated under proper
conditions and within design limitations. All installation,
startup, and maintenance instructions must be followed
carefully.
HOW REVERSE OSMOSIS WORKS
In the reverse osmosis process, water is forced under
pressure through a semipermeable membrane to reduce
the dissolved mineral content of the water. The membrane
allows water molecules to pass through, but blocks/hinders
the passage of dissolved substances and suspended
particles. This process reduces the levels of dissolved
salts, minerals, and suspended particles, while improving
the taste, odor, and clarity of the water.
Certain contaminants found in water are measured as
Total Dissolved Solids (TDS). Unlike conventional ltration
systems, reverse osmosis systems divide the feed water
into two streams: product water (permeate) and drain/
reject water (concentrate). The product water is the desired
outcome of the RO System—much cleaner and fresher
tasting water! The drain/reject water is vital for carrying
away the dissolved salts, minerals, and suspended
particles. Unlike conventional ltration systems, most
contaminants removed from water are not held within the
system, but instead ushed away.
DEFINITIONS
Feed Water – The incoming water to be processed by the
RO system.
Product Water (permeate) – The portion of the feed water
that has passed through the membrane element. It is the
desired result of a RO system.
Concentrate Water (reject or drain water plus
recirculation) – The portion of the feed water that has
owed across the membrane (not through) and has not
been converted to product water. This water now contains
a higher concentrate of dissolved solids and may also
contain organic matter and suspended particles rejected
by the membrane. The concentrate is then split into two
streams—reject and recirculation. The recirculated water
is mixed with the feed water on the inlet side of the pump.
The reject water is sent down the drain. This design is used
as a way to minimize the amount of water sent to drain.
Recovery – The percentage of feed water which becomes
product water. The recovery rate is determined by the
number of gallons (or liters) of product water divided by the
total gallons (or liters) of feed water, and multiplied by 100.
Percent Rejection – The percentage of dissolved solids in
the feed water that does not pass through the membrane.
The membrane prevents passage of dissolved solids and
other contaminants into the product water.
Conductivity – The property of a substance to conduct or
transmit electricity. The unit of measure is in mhos and is
commonly used to determine the purity or quality of water.
In the water treatment industry, it is often converted to ppm
TDS (parts per million Total Dissolved Solids).
FACTORS AFFECTING SYSTEM OPERATION AND
PERFORMANCE
Feed Water Temperature – The volume of product
water increases with higher feed water temperatures,
and decreases with lower feed water temperatures.
Temperatures below 35°F could crack the membrane
element, and temperatures above 90°F may cause rapid
deterioration. The recommended range is between 45°F
and 90°F.
Feed Water Pressure – The recommended range is
between 40 psi and 85 psi. This is the most common range
of municipal water supplies.
Hydrolysis – The natural chemical breakdown of
membrane elements when in contact with water. This
breakdown is accelerated when the water temperature
is above 90°F, the pH is not within the tolerable range,
or when hydrogen sulde is present. Refer to the
System Specications section of this manual. Additional
pretreatment may be required in these cases.
Bacteria – When RO systems are operated intermittently,
they will likely be exposed to bacteria. Following a
prolonged shutdown or storage period, the system should
be sanitized. Refer to the Sanitizing the RO System section
in this manual regarding sanitization.
Membrane Element Fouling or Surface Coating –
Fouling is a common problem with membrane elements
as a result of salts, hardness, iron, etc. collecting on the
membrane surface. As the pores and channels of the
membrane element become plugged, the water production
rate is reduced. Pretreatment equipment, such as a water
softener, iron lter, or activated carbon lter will reduce
membrane element fouling and extend its life.

Page 4
GETTING TO KNOW YOUR BLS RO SYSTEM
BLS 9000 OPTIMUM
It is important that you familiarize yourself with the BLS RO System. Pictured below is the BLS RO System with the main
components identied. These components will be referred to throughout the manual. Noting their location will assist you in
startup and maintenance of the RO system.
MAJOR COMPONENTS PARTS LIST
THIS MANUAL COVERS THE INSTALLATION, OPERATION, AND MAINTENANCE OF THE BLS 9000 OPTIMUM
SYSTEM. IT IS IMPORTANT TO READ THIS MANUAL THOROUGHLY BEFORE INSTALLING THE SYSTEM.
1. System Operating Pressure Gauge
2. S-150 RO Controller
3. Product Water Flow Meter
4. Inlet Feed Water Low Pressure Switch
5. Reject Water Flow Meter
6. Reject Water Control Valve
7. Pre-Filter Inlet Pressure Gauge
8. Pre-Filter Outlet Pressure Gauge
9. Pre-Filter Housing
10. Pump/Motor
11. Pressure Regulator
12. Inlet Solenoid Valve
13. Auto Flush Solenoid Valve
14. Membrane Pressure Vessels
15. Product Water TDS Probe
16. Product Water Check Valve

Page 5
SYSTEM SPECIFICATIONS
SYSTEM OPERATION SPECIFICATIONS
Production Rate 9,000 gpd / 6.3 gpm (34,069 lpd / 23.7 lpm)
Membrane Elements (3) 4 x 40 High Flux TFC Polyamide
Rejection Rate 95 to 99%
Recovery Rate 50 to 70%
Nominal Flow of Feed Water During Operation 9.45 gpm
Nominal Flow of Feed Water During System Flush 16 gpm
Low Feed Water Pressure Switch System shuts down at 15 psi
System starts at 20 psi
Product Water Pressure Switch (Optional) System shuts down at 45 psi
System starts at 25 psi
System Operating Pressure 165 psi
Product Water Back Pressure Maximum 50 psi
Pre-Filtration Minimum 5 micron*
* An activated carbon lter is required with chlorinated feed water.
FEED WATER PARAMETERS
This system is designed for use on potable water sources only.
Temperature 40 to 85ºF
Inlet Feed Water Pressure 35 to 85 psi
Chlorine Maximum 0.1 ppm
Hardness Maximum 10 gpg
Oil Tolerance 0.0 ppm
Silt Density Index (SDI) 5
Turbidity Maximum 1 NTU
pH 3 to 10
Hydrogen Sulde Must be removed
Iron Maximum (Dissolved Only) 0.01 ppm
TDS Maximum 2,000 ppm
Operating Pressure Maximum 180 psi
DIMENSIONS AND WEIGHT
Height 60 inch (152 cm)
Width 25 inch (64 cm)
Depth 21 inch (53 cm)
Weight (approximate) 300 lb (136 kg)
SERVICE CONNECTIONS
Feed Water Inlet 3/4 inch FNPT
Reject Outlet to Drain 1/2 inch Tube
Product Outlet Storage 1/2 inch Tube
DESIGN TEST CONDITIONS
Feed Water TDS 500 ppm as NaCl
Operating Pressure 165 psi
Feed Water Temperature 77ºF (25ºC)
System Design Recovery 70%

Page 6
SYSTEM INSTALLATION
INSTRUCTIONS
IMPORTANT! Installation must comply with local
plumbing, electrical, and sanitation codes.
IMPORTANT! Do not use this system to make safe
drinking water from non-potable water sources.
Do not use the system on microbiologically unsafe
water or water of unknown quality without adequate
disinfection before or after the system.
BLS RO Systems will operate most e󰀩ciently on ltered
water with pH of less than 6.5, SDI of 5 or less, and
hardness of less than 10 gpg. If the system is operated
with levels higher than these, other forms of pretreatment
may necessary.
Feed water must not contain free chlorine, formalin, quater-
nary germicides, cationic surfactant, detergents containing
non-ionic surfactant, such as ALL or Triton, or membrane
element cleaners other than those approved for use.
STEP ONE
Unpack Your BLS System
BLS Systems are carefully inspected, tested, and
packaged. They are shipped in proper working order and in
excellent condition.
Remove the system from the shipping container and
inspect it for signs of concealed damage which may have
occurred during shipping. If damage has occurred, contact
the delivering carrier and le a claim for damages.
NOTE! Do not, under any circumstances, remove any
caution, warning, or other descriptive labels from the
BLS RO System.
STEP TWO
Select an Installation Site
Your BLS System should be positioned on a hard level
surface capable of supporting the entire weight of the
system. See the System Specications section of this
manual for approximate weight and dimensions.
STEP THREE
Feed Water Supply Connections
A cold water supply source must be located within close
proximity to the system. This will be the inlet feed water
supply. Feed water pressure must be a minimum of 35 psi.
Remove the plug from the inlet side of the lter housing
marked INLET. Connect a minimum feed water line of
3/4 inch hose or pipe.
CAUTION! Do not connect a hot water line to the BLS
System. Feed water must be a cold water supply.
STEP FOUR
Product Water Connection
During the initial startup procedure, after a membrane
element replacement, or after sanitization of the system,
you will want to divert the product water line to your
wastewater drain.
This can be done by either installing a 3-way valve in the
line or by disconnecting the tubing to your storage tank. It
is always important to divert the product water to drain for
the rst 30 to 60 minutes of operation because membrane
elements are treated with preservation solution that should
be rinsed free.
If an atmospheric storage tank is being used, a tank
level oat control switch and repressurization system
(optional features) will be required to shut the system o󰀨
and to pump the product water to your application.
If a pressurized storage tank is being used, the product
water safety pressure switch is factory wired to initiate a
pressure fault alarm when the product water back pressure
reaches 45 psi. The dry contact wires are connected
directly to the TANK FULL HIGH terminals of the RO
controller. The switch will then shut the system o󰀨 when the
tank pressure reaches 45 psi.

Page 7
SYSTEM INSTALLATION
INSTRUCTIONS (continued)
CAUTION! Do not install a valve in the product water
line unless the Product Pressure Switch / Product
Pressure Relief Valve option is included with the
system. Serious damage can occur if the system is
operated with a closed valve.
Remove the plug from the product water outlet (marked
PRODUCT). Connect 1/2 inch tubing or pipe to this port,
but do not connect it to the storage tank or other dispensing
system right now. There will be further instructions in the
System Startup Procedure section of this manual regarding
additional steps required, prior to connecting the storage
tank. For now, divert this line to your wastewater drain.
STEP FIVE
Drain/Reject Water Connection
A wastewater drain must be near the installation site. This
will be your connection for the reject water (drain) which
is carrying a high level of concentrated dissolved salts,
minerals, and suspended particles that were rejected by
the membrane element.
Remove the plug from the drain water outlet (marked
DRAIN) on the left-hand side of the system. Using 1/2 inch
tubing or pipe, connect this outlet port to your wastewater
drain.
NOTE! It is recommended to install an air gap
connection to prevent wastewater backow.
STEP SIX
Electrical Connections
A grounded electrical supply of the proper voltage for your
system should be near the installation site. The system will
be damaged if connected to a power source other than the
voltage, phase, and hertz specied on the serial number
label. See the wiring diagrams at the end of this manual for
the correct power connections in the control enclosure.
IMPORTANT! This system must be installed with
disconnecting means required as per electrical code.
CAUTION! A water softener should not be allowed to
regenerate while the BLS RO System is operating,
unless pre-treatment interlock safeguards are used to
be sure the system is shutdown.
CAUTION! Connecting the system to a power source
that does not match the system power rating EXACTLY
can damage the system and void the warranty.
STEP SEVEN
Tank Level Float Control Switch & Pretreatment
Lock-out Switch
On terminal strip P9 on the microprocessor controller PC
board, there are terminals labeled TANK FULL HIGH. A
jumper was installed across these terminals before the
system was shipped. Remove this jumper and connect a
Normally Closed (NC) tank level oat control switch.
On terminal strip P9 on the microprocessor controller PC
board there are terminals labeled PRETREAT. A jumper
was installed across these terminals before the system
was shipped. Remove this jumper and connect a Normally
Closed (NC) switch from the softener or lter which will
open during the complete backwash/regeneration cycle.
NOTE! If you are not using one or both of these sets
of terminals, the jumpers must remain in place or the
system will not operate.
CAUTION! Switch inputs are for dry contacts only.
Applying any voltage to these terminals will damage
the controller.
STEP EIGHT
Install Filter Cartridge
Refer to the Filter Cartridge Installation and Replacement
section in this manual.
STEP NINE
John Guest Safety Locking Clips
To ensure the highest level of reliability and system
longevity, red locking clips have been installed on all John
Guest tubing connections. This will make the connections
more secure and protect the system from accidental
disconnects. Two extra locking clips have been included
with this manual. These should be attached at the product
and drain ports of the system, after you have made your
connections.
IMPORTANT! Prior to startup of the system, visually
inspect the inlet, drain, and product water connections
completely. Check to be sure the system is connected
to a properly grounded electrical power supply with
the appropriate voltage, phase, and hertz.

Page 8
S-150 RO CONTROLLER GUIDE
IMPORTANT! Be sure to read the S-150 RO Controller
Guide section carefully before attempting to operate
this BLS System and before changing any controller
settings. Do not attempt to change any controller
settings without carefully reading this section of the
manual.
CONTROLLER INTRODUCTION
Your BLS System is controlled by a Series 150 (S-150) RO
Microprocessor Controller. It is a state-of-the-art control
system for commercial and industrial RO systems.
The S-150 is a microprocessor controlled system that can
monitor pressure and level switches. A TDS/Conductivity
monitor/controller with programmable setpoints also plays
an integral part of the S-150. The S-150 displays system
status, switch conditions, and sensor readings on an easy-
to-read backlit display. User programmable setpoints are
provided to allow fast and easy adjustments of system
parameters.
CONTROLLER SPECIFICATIONS
Power
120/240 VAC –15+10%, 50/60 Hz, 25 Watts
Environment
–22ºF to 140ºF, 0 to 95% RH, non-condensing
Enclosure
8 x 6 x 4 inch (203 x 152 x 102 mm) NEMA 4X
Display
2 line x 20 character, alphanumeric backlit LCD
Front Panel
Overlay with LCD window, alarm lamp, 7-key membrane
switch
Switch Inputs, Dry Contact
Pressure fault, pretreat lockout, tank full high, tank full low
Relay Outputs
RO pump relay 120/240 VAC, 1 HP*
Inlet valve relay 120/240 VAC, 5 A
Flush valve relay 120/240 VAC, 5 A
Relays supply the same output voltage as board power
(120 or 240 VAC), 20 A maximum total load.
* Based on service factor of 1.0.
Cell
TDS/Conductivity cell with digital display
Standard range 0 to 250 ppm or µS
Other ranges available 50, 100, 500, 1000, 2500, 5000
Wetted parts ABS and 316SS, 3/4 inch NPTM,
300 psi max.
I/O Expander (Optional)
Aux/divert/boost relay 120/240 VAC, 1 HP
Divert/alarm relay 120/240 VAC, 5 A
Tank low switch input Dry contact
FIGURE 1
FRONT PANEL CONTROLS AND INDICATORS
Display – Shows the status of the RO System.
Alarm Lamp – Flashes when a fault causes an RO system
shutdown. On steady when a setpoint is exceeded that
does not cause an RO system shutdown.
Power Key – Places the controller in operating or standby
mode.
Left Arrow Key – Scrolls through the setpoints starting
with the rst setpoint.
Right Arrow Key – Scrolls through the setpoints starting
with the last setpoint.
Up Arrow Key – Increases the value of a setpoint.
Down Arrow Key – Decreases the value of a setpoint
Enter Key – Conrms the entry of a new setpoint value.
Alarm Silence/Reset Key – Push once for alarm silence,
and twice to reset the system after a shutdown has
occcurred.

Page 9
S-150 RO CONTROLLER GUIDE
(continued)
IMPORTANT! Refer to the BLS RO Controller S-150
Setpoints table in this manual for a list of factory
presets. The write protect jumper (J3) is in the ON
position (center and right pins). To make changes
to setpoints, the write protect jumper must be in the
OFF position (center and left pins). After any change
is made, remember to press the ENTER button to
save changes, and return the jumper back to the ON
position. For future reference, a note should be added
to the setpoint table to indicate any setpoint changes
that were made.
TERMINAL STRIP, JUMPER, AND ADJUSTMENT
LOCATIONS
Refer to the Electrical Schematics in this manual for the
location of all terminal strips and connectors. The ElectricaI
Schematics also show all jumper and adjustment locations.
POWER WIRING
Refer to the Electrical Schematics in this manual for
terminal strip and jumper locations. Before applying power
to the unit, verify that the voltage jumpers are congured
correctly for the voltage that will power the unit. The
voltage jumpers are located below the transformer. For
120 VAC operation, there should be a wire jumper installed
between P2 and P3 and a second wire jumper installed
between P4 and P5. For 240 VAC operation, a single wire
jumper should be installed between P3 and P4.
AC power for the unit is connected to terminal strip P1.
Connect the ground wire of the AC power to the terminal
labeled GND. For AC power with a neutral and hot wire,
the hot wire connects to L1 and the neutral wire connects
to L2. For AC power with two hot wires, either wire can
connect to L1 and L2. On AC power with two hot wires, the
wire jumper between P6 and P7 should be removed and a
fuse (GMA 1/4A) installed in F2.
PUMP AND RELAY OUTPUTS
The S-150 supplies relay outputs to control the RO pump
and solenoid valves.
NOTE! The relays output the same voltage as the AC
power to the board. If the pump and solenoids operate
on dierent voltages, a contactor will need to be
supplied to operate the pump.
RO PUMP WIRING
The RO pump connects to the L1 and L2 RO pump
terminals of P1. This output can operate 120/240 VAC
motors up to 1 HP directly. For motors larger than 1 HP
or 3-phase motors, this output can be used to operate a
contactor.
INLET AND FLUSH SOLENOID WIRING
The inlet and ush valves must operate at the same
voltage as supplied to the board. These outputs can supply
5 A maximum and are not designed to operate pump
motors directly. If these outputs are to be used to operate a
boost or ush pump, the output should be used to operate
a contactor. The inlet valve connects to the L1 and L2 inlet
terminals of P1. The ush valve connects to the L1 and L2
ush terminals of P1.
TDS/CONDUCTIVITY CELL WIRING
For accurate TDS/Conductivity readings, the cell should be
installed in a tee tting where a continuous ow of water
passes over the cell and no air can be trapped around the
cell. The cell is connected with ve wires to terminal strip
P10. Connect each colored wire to the terminal labeled
with the same color.
SWITCH INPUTS
Switch inputs are connected to P9. The connections
for these inputs are not polarity sensitive and can be
connected to either terminal. The switch inputs should be
dry contact closures only.
SWITCH NO NC VALUE
Pressure Fault 0 1 1
Pretreat 0 2 2
Tank Full High 0 4 4
Tank Full Low 0 8 0
Tank Low 0 16 0
TOTAL 7
TABLE 1
Referencing Table 1, select the type of switch used for
each input and put that number in the value column. Add
the values and program the total in the Switch Select
Setpoint. In the Table 1 example, the Pressure Fault,
Pretreat, and Tank Full High inputs are Normally Closed
(NC) and the Tank Full Low and Tank Low inputs are
Normally Open (NO). Therefore, the value programmed in
the Switch Select Setpoint would be 7 (1 + 2 + 4 + 0 + 0).

Page 10
S-150 RO CONTROLLER GUIDE
(continued)
CAUTION! Applying voltage to these terminals will
damage the controller. The switches can be either
Normally Open (NO) or Normally Closed (NC) in any
combination. The switch connected to an input that is
congured as Normally Open (NO) must be open for
the unit to run. The switch connected to an input that
is congured as Normally Closed (NC) must be closed
for the unit to run. The Switch Select Setpoint allows
each input to be congured as Normally Open (NO) or
Normally Closed (NC). The Switch Select Setpoint is
defaulted to 0, which programs all inputs as Normally
Open (NO). This means that all switch inputs must be
open for the unit to run. Table 1 lists the values used to
program the setpoint to congure the inputs.
Pressure Fault Switch
On systems where a low feed pressure shutdown is
required, a feed pressure switch can be connected to
the pressure fault input of P9. If a high pump pressure
shutdown is required, a high pressure switch can be
connected to this input. If both low feed pressure and high
pump pressure shutdowns are required, both switches can
be connected to this input. Both switches must be either
Normally Open (NO) or Normally Closed (NC) to operate
properly.
IMPORTANT! The output from a pressure switch must
be a dry contact and must not supply voltage.
Pretreat Switch
In systems with pretreatment, a pretreat lockout switch can
be connected to the pretreat input of P9. This switch should
operate when the pretreatment device is out of service.
IMPORTANT! The output from the pretreatment device
must be a dry contact and must not supply voltage.
Tank Full Switch
In systems with a single tank level switch for controlling the
RO pump, the level switch connects to the tank full high
input of P9. If dual level switches are used for controlling
the RO pump, the upper level switch connects to the tank
full high input of P9, and the lower level switch connects
to the tank full low input of P9. Remove the red jumper
that was shipped with the RO system when this option is
used. Refer to the Electrical Schematics in this manual for
terminal strip and jumper locations.
IMPORTANT! The output from the tank level switch
must be a dry contact and must not supply voltage.
I/O EXPANDER BOARD (OPTIONAL)
If the optional I/O expander board is installed, two
additional relay outputs and one additional switch input are
provided. AC power for the relays is connected to the L1
and L2 power terminals of P1. Relay 1 is connected to this
power input and will supply the same voltage. This relay is
rated for 120/240 VAC at 1 HP maximum. Relay 1 can be
congured to supply a dry contact by connecting a jumper
wire between the L1 and L2 power terminals of P1.
NOTE! If Relay 1 is congured as a dry contact, Relay 2
must be congured as a dry contact also. If Relay 1 is
congured to supply voltage, Relay 2 can be selected
to supply voltage, 120/240 VAC, 5 A maximum, or as a
dry contact output.
Jumpers J1 to J4 are used to select the Relay 2 output
type. To output voltage, a wire jumper is installed between
J1 and J4 and a second wire jumper is installed between
J2 and J3. For a contact closure output, a single wire
jumper is installed between J3 and J4. The two relay
outputs can be selected to operate as an auxiliary pump
output, a divert output, or an alarm output by programming
the Expander Mode Setpoint. Table 2 shows the values
used to program the relay outputs.
EXPANDER
MODE RELAY 1 RELAY 2
0 Auxiliary Pump Divert
1 Auxiliary Pump Alarm
2 Divert Alarm
3 Boost Divert
4 Boost Alarm
TABLE 2
Auxiliary Pump
If the Expander Mode Setpoint is programmed to 0 or 1,
Relay 1 operates as an auxiliary pump output. This
output is energized when the tank low input is not active.
This output will supply power or a contact closure, as
determined by the connections L1 and L2 of the terminal
strip P1.
Boost Pump
If the Expander Mode Setpoint is programmed to 3 or 4,
Relay 1 operates as a boost pump output. This output
is energized when the inlet solenoid output is active.
This output will supply power or a contact closure, as
determined by the connections L1 and L2 of the terminal
strip P1.

Page 11
S-150 RO CONTROLLER GUIDE
(continued)
Divert Output
If the Expander Mode Setpoint is programmed to 0 or 3,
Relay 2 operates as a divert relay and will operate
whenever the unit is in the divert mode. ZThis output will
supply voltage or provide a contact closure based on the
conguration of Relay 1 and on the position of jumpers
J1 to J4. If the Expander Mode Setpoint is programmed
to 2, Relay 1 operates as a divert relay and will operate
whenever the unit is in the divert mode. This output will
supply power or a contact closure, as determined by the
connections L1 and L2 of the terminal strip P1.
Alarm Output
If the Expander Mode Setpoint is programmed to 1, 2, or
4, Relay 2 operates as an alarm relay. When an alarm or
warning is active, this relay will supply voltage or provide a
contact closure based on the conguration of Relay 1 and
the position of jumpers J1 to J4.
Tank Low Switch
A tank low switch input can be connected to the tank low
input of P2 on the expander board. This input will provide
a tank low warning on the unit, and if the expander is
programmed to provide an auxiliary pump output, it will
provide low tank level protection for this pump.
CHANGE OR DISPLAY SETPOINTS
IMPORTANT! Setpoints cannot be changed if the write
protect jumper is in the ON position.
1. Refer to Figure 1 for the location of the keys used to
display or change the setpoints, and the Electrical
Schematics in this manual for the location of the write
protect jumper, J3. For the unit to be able to accept a
change in a setpoint, the shorting jumper must be in
the OFF position (center and left pins).
2. Use the left and right arrow keys to display the
setpoints. Each press of an arrow key will advance the
display to the next setpoint. The left arrow key starts
with the beginning setpoint, and the right arrow key
starts with the last setpoint.
3. The up and down arrow keys are used to increment or
decrement the setpoint value. The value will change
by one (1) count each time a key is pressed. If the key
is pressed and held for approximately one (1) second,
the setpoint value will change at a fast rate. When the
key is released, the fast rate will be reset. Pressing
both the up and down arrow keys together will reset
the setpoint value to zero (0).
4. Pressing the Alarm Silence/Reset key at any time will
cancel the operation and return the display to the main
screen.
5. To save the new setpoint value, press the Enter key.
6. The unit will beep twice if the change is accepted.
If the write protect jumper is on, the unit will show
WRITE PROTECTED on the display and one long
beep will sound.
7. When nished changing setpoints, the write protect
jumper should be placed in the ON position (center
and right pins).
SYSTEM OPERATION
The unit has two modes of operation, a standby mode
and an operating mode. In the standby mode, the unit is
e󰀨ectively o󰀨. All outputs are turned o󰀨 and the display
shows STANDBY. In the operating mode, the unit operates
automatically. All inputs are monitored and the outputs
are controlled accordingly. Pressing the Power key will
toggle the unit from standby to operate, or from operate to
standby. If power is removed from the unit, when power is
reapplied, the unit will restart in the mode it was in when
power was removed.
DISPLAY
The display is a 2-line x 20-character backlit liquid crystal
display. System operating status and sensor readings are
shown on this display. Setpoint information is also shown
on this display.
OPERATING STATUS MESSAGE
The operating status of the unit is shown on the top line of
the display. The following list describes the items shown for
the operating status.
STANDBY — The unit is in the standby mode.
DELAY 99 — The unit is in the RO start delay. The number
is the seconds remaining before the RO pump starts.
OPERATING — The RO unit is operating.
TANK FULL — The unit is shut down due to a tank full
condition.
TANK FULL 99 — The unit is shut down due to a tank full
condition. If the number is blinking, the tank full high switch
has cleared, but the tank full low switch is still active. If the
number is on steady, both tank level switches have cleared
and the delay is counting down.
PRETREAT — The unit is shut down due to a pretreat
lockout condition.
PRESS FAULT — The unit is shut down due to a pressure
fault condition.
MEMB FLUSH 99 — Membrane ush is active. The
number is the minutes remaining in the ush cycle.

Page 12
S-150 RO CONTROLLER GUIDE
(continued)
TDS/CONDUCTIVITY
The TDS/Conductivity is shown on the top line after the
unit operating status. When the unit is o󰀪ine because of a
shutdown condition, the reading is replaced with ‘----’. If the
reading is over range, the reading is shown as ‘^^^^’.
OPERATING HOURS
The current operating hours are shown on the bottom line.
WARNING MESSAGES
Warning messages are also shown on the second line. If
any warnings are active, the active warnings will alternate
with the normal displays for the bottom line. The following
lists the warning messages.
HI TDS/Cond — The TDS/Conductivity reading has
exceeded the programmed limit.
TANK LOW — The tank low input is active.
TANK LOW 99 — The tank low input has cleared, but the
tank low restart delay is active. The number is the minutes
left in the delay.
OP HOURS EXCEEDED — The current operating hours
have exceeded the programmed limit.
TANK FULL OPERATION
The unit can be operated with one or two level switches.
With one level switch, the switch is connected to the tank
full high input. When this switch has been active for ve
(5) seconds, the unit will shut down on tank full. TANK
FULL will show on the display. When the tank full condition
clears, the display will show TANK FULL 99. The number is
the tank full restart time and the unit will restart when this
delay times out.
For two level switch operation, the upper switch is
connected to the tank full high input, and the lower switch
is connected to the tank full low input. When both switches
are clear, the RO unit will run. The RO unit will continue
to run when the water level rises and the lower switch
becomes active. When the upper switch becomes active,
after the ve (5) second delay, the RO unit will shut down.
TANK FULL will show on the display. When the tank level
drops and the upper level switch clears, the display will
show TANK FULL 99 and the RO unit will remain o󰀨. The
number is the tank full restart time and the number will
blink until the lower level switch clears. When the lower
level switch clears, the number will remain steady and the
RO will restart when the delay times out.
TANK FULL RESTART
The tank full restart is the delay before the RO unit starts
when a tank full condition clears. This delay can be in
minutes or in seconds. The TF Restart Setpoint selects
seconds or minutes.
TANK FULL OVERRIDE
A timed tank full override can be initiated when the RO
unit is shut down due to a tank full condition. Pressing the
Alarm Silence/Reset key for three (3) seconds during a
tank full condition will enable the tank full override. The RO
will start and TF OVERRIDE 9 will show on the display.
The number is the minutes remaining in the override timer.
When the override times out, the unit will return to the tank
full shut down condition.
PRESSURE FAULT
If the pressure fault input becomes active and stays active
for the delay programmed in the PF Delay Setpoint, the
unit will shut down for a pressure fault. The display will
show PRESS FAULT, the alarm lamp will ash, and the
audible alarm will sound. The pressure fault can be cleared
by pressing the Alarm Silence/Reset key twice.
AUTO RESET
If a pressure fault shutdown occurs and the Auto Reset
Setpoint is programmed to zero (0), the unit will remain
shut down until manually reset. If the Auto Reset Setpoint
is programmed to a value greater than zero (0), the unit will
automatically clear the pressure fault and attempt to restart
after this delay times out.
ALARM SILENCE
When a shut down occurs that causes the audible alarm
to sound, the alarm can be silenced by pressing the Alarm
Silence/Reset key once. The alarm will remain silenced if
the Alarm Silence Setpoint is programmed to zero (0). If the
Alarm Silence Setpoint is programmed to a value greater
than zero (0), the alarm will resound after this delay times
out. Pressing the Alarm Silence/Reset key will silence the
alarm and reset this delay.
PRETREAT
If the pretreat input becomes active and stays active
for two (2) seconds, the unit will shut down in a pretreat
lockout condition. PRETREAT will show on the display and
the unit will remain shut down as long as the pretreat input
is active.

Page 13
S-150 RO CONTROLLER GUIDE
(continued)
MEMBRANE FLUSH
If the BLS RO System is an Optimum (OPTI) model, a
ush solenoid valve has been equipped and the Flush
Type Setpoints can be used to enable a membrane ush at
di󰀨erent times.
If the Flush Type Setpoint is programmed to zero (0), ush
is disabled. If membrane ush is desired, several types of
ush are available. When the RO system enters a ush
cycle, the ush relay will activate. The ush cycle will
last for the time programmed in the Flush Time Setpoint.
Table 3 shows the value that must be programmed in the
Flush Type Setpoint for each type of ush.
FLUSH TYPE DESCRIPTION
0 NO FLUSH
1 TANK FULL
2 OPERATING HOURS
3 OPERATING HOURS & TANK FULL
4 ELAPSED TIME
5 ELAPSED TIME & TANK FULL
6 OFF HOURS
7 OFF HOURS & TANK FULL
8 RO START/STOP
TABLE 3
TANK FULL — The RO unit will ush each time a tank full
condition occurs.
OPERATING HOURS — A ush will occur when the RO
pump has operated for the number of hours programmed in
the Flush Interval Setpoint.
ELAPSED TIME — A ush will occur after the number
of hours programmed in the Flush Interval Setpoint has
passed.
OFF HOURS — A ush will occur when the RO has been
shut down due to a tank full condition for the number of
hours programmed in the Flush Interval Setpoint.
RO START /STOP — A ush will occur each time the RO
starts or stops.
The tank full ush can be combined with any of the
three interval ush types. A manual ush can be initiated
by pressing the Alarm Silence/Reset key for three (3)
seconds.
Membrane Flush Mode
The Flush Mode Setpoint can be used to control the
operation of the inlet valve and RO pump during ush.
Each can be independently programmed to operate during
ush. Table 4 shows the values to program into the Flush
Mode Setpoint to control the operation of the inlet and RO
outputs during ush.
FLUSH
MODE RO PUMP INLET VALUE
0 OFF CLOSED
1 OFF OPEN
2 ON CLOSED
3 ON OPEN
TABLE 4
HIGH TDS/CONDUCTIVITY WARNING/ALARM
If the TDS/Conductivity reading exceeds the limit
programmed in the TDS/Cond Limit Setpoint for the delay
programmed in the TDS/Cond Delay Setpoint, the alarm
lamp will light and the HI TDS/Cond warning message will
show on the display. This warning will clear when the TDS/
Conductivity drops below the setpoint. If the TDS/Cond
Shtdwn Setpoint is programmed to 0, the unit will continue
to operate. Otherwise, once a high TDS/Cond warning
occurs, after the time programmed in this setpoint, the RO
unit will shut down and the alarm will sound. The alarm can
be cleared by pressing the Alarm Silence/Reset key twice.
NOTE! The auto reset function is not active for this
shut down.
OPERATING HOURS EXCEEDED
If the current hours exceed the limit programmed in the
Maximum Hours Setpoint, the alarm lamp will light and the
OP HOURS EXCEEDED warning message will be shown.
This warning can be cleared by programming the current
hours to zero (0) or by increasing the maximum hours limit.
I/O EXPANDER (OPTIONAL)
The I/O expander board adds two relays and one switch
input. The operation and programming of the two relays
is described in the I/O Expander Board section of this
manual.
Auxiliary Output
Relay 1 can be used to control a repressurization pump
when Relay 1 of the expander board is congured to
operate an auxiliary relay. In this mode, this relay will be
energized as long as the tank low input is not active. When
energized, the relay supplies power to the repressurization
pump.

Page 14
S-150 RO CONTROLLER GUIDE
(continued)
Tank Low
When the tank low input has been active for ve (5)
seconds, the auxiliary output will turn o󰀨. The alarm lamp
will light and the TANK LOW warning message will show on
the display. When the tank low condition clears, the TANK
LOW 99 warning message is displayed. The number is the
delay in minutes before the auxiliary relay will energize.
For boost pump operation, when the tank low input has
been active for ve (5) seconds, the boost pump output
will turn o󰀨, the RO unit will shut down, the alarm lamp will
ash, and the audible alarm will sound. The TANK LOW
shutdown message will show on the display. When the
tank low condition clears, the TANK LOW 99 shutdown
message is displayed. The number is the delay before the
RO unit will restart. The shutdown can be manually reset
by pressing the Alarm Silence/Reset button twice.
Boost Pump Output
Relay 1 can be used to control a boost pump when the
expander board is congured to operate Relay 1 as a boost
pump relay. This relay will operate the same as the inlet
solenoid relay. This option is used to directly operate a
boost pump up to 1 HP.
Divert Output
When Relay 1 or Relay 2 has been programmed to operate
as a divert relay, the relay will energize when the TDS/
Conductivity exceeds the TDS/Cond Limit Setpoint. This
will occur as soon as the reading exceeds the limit, there is
no delay. When the reading drops below the limit and stays
below the limit continuously for ve (5) seconds, the divert
relay will turn o󰀨.
Alarm Output
When Relay 2 has been programmed to operate as an
alarm relay, the relay will energize whenever a warning or
alarm condition occurs. The relay will remain energized as
long as the warning/alarm condition is active.
CONTROLLER ADJUSTMENTS
TDS/Conductivity Calibration
Refer to the Electrical Schematics in this manual for the
adjustment location. To calibrate the TDS/Conductivity,
place the cell in a known standard solution. Adjust the span
control for the correct reading. If the cell is installed, the
unit can be calibrated by taking a sample of the permeate
water and testing it with a known, good meter.
Adjust the span control until the reading matches the
meter.
NOTE: If the TDS/Conductivity range is changed, the
unit must be recalibrated AND some components may
need to be changed.
Display Adjustment
The display contrast can be adjusted for best viewing by
adjusting control R3. This control is located toward the
upper right corner of the board, just to the left of the cell
connector.
TDS/CONDUCTIVITY EXPANDER (OPTIONAL}
The TDS/Conductivity expander board allows a second
TDS/Conductivity to be monitored and displayed by the
S-150 controller. The expander board is mounted on the
main board to the left of the connector for the rst cell.
Figure 2 shows the wiring and adjustment information for
the expander.
FIGURE 2
Operation
When the TDS/Conductivity expander is installed,
the reading will be shown on line 2 and will alternate
every three (3) to four (4) seconds with the hours and
temperature. If the% rejection display is enabled, it will be
shown on line 2 with the second TDS/Conductivity reading.
If the C2 limit is enabled, and the second TDS/Conductivity
reading exceeds the limit programmed the C2 Limit
Setpoint for the delay programmed in the TDS/Cond Delay
Setpoint, the alarm lamp will light and the HI TDS/Cond 2
warning message will show on the display. This warning
will clear when the second TDS/Conductivity drops below
the setpoint.

Page 15
S-150 RO CONTROLLER GUIDE
(continued)
Calibration
Refer to Figure 2 for adjustment location. To calibrate
the second TDS/Conductivity, place the cell in a known
standard solution. Adjust the span control for the correct
reading. If the cell is installed, the unit can be calibrated by
taking a sample of the water and testing it with a known,
good meter. Adjust the span control until the reading
matches the meter.
Set Points
When the expander is installed, three additional setpoints
are provided to allow features of the expander to be
changed. Refer to the Change or Display Setpoints section
of the manual for information on changing the setpoints.
The additional setpoints are listed in Table 5.
SETPOINT DESCRIPTION RANGE DEFAULT
C2 Range
Selects the range of TDS/Conductivity monitor: 0 = 50, 1 = 100, 2 = 250, 3 = 500,
4 = 1000, 5 = 2500, 6 = 5000
NOTE: If this setpoint is changed, the unit must be recalibrated and range components may need
to be changed.
0 to 6 2
C2 Limit When this value is met or exceeded, the alarm lamp will light and high TDS/Cond will
show on the display. To disable, set to 0.
0 to 999
µs or ppm
100
µs or ppm
% Rej If the second TDS/Conductivity is used to monitor feed water, programming this
setpoint to 1 allows the % rejection to be displayed. 0 to 1 0
TABLE 5
TROUBLESHOOTING
CAUTION! Hazardous voltages are present when
power is applied to the unit. Care should be taken
when troubleshooting any of the input power or output
circuits. When disconnecting or connecting any board
or accessory, be sure the power is turned OFF at the
disconnect.
IMPORTANT! Before contacting technical support,
please verify the programming of all setpoints, check
the display, and check the status of all lights and
indicators for best results.
System Inoperative
Is the yellow CPU active LED blinking? If no, is the green
power LED, DS1 lit? If no, is the fuse OK? If no, replace
the fuse. If yes, with a voltmeter, verify power is applied to
the power terminals L1 and L2. If power is applied to the
power terminals and the above checks are OK, the board is
probably defective and should be replaced. If no power is
applied to the board, check the power wiring to the system.
Display Blank
Is the green power LED, DS1 lit? If no, refer to the System
Inoperative section above. If yes, is the CPU active LED,
DS9 blinking? If no, replace the board. If yes, adjust the
display contrast adjustment, R3. Is the display still blank? If
yes, replace the board.
Inlet Valve Will Not Operate
Is the system in standby? If no, are any shutdown
conditions active? If no, is the inlet LED, DS8 lit? If no,
replace the board. If yes, with a voltmeter, verify if there is
power on the inlet terminals. Is there power? If no, replace
the board. If yes, check the valve and wiring.
RO Pump Will Not Operate
Is the system in standby? If no, are any shutdown
conditions active? If no, is the RO LED, DS6 lit? If no,
replace the board. If yes, with a voltmeter, verify if there is
power on the RO pump terminals. Is there power? If no,
replace the board. If yes, check the pump and wiring.
Unit Not Flushing or Not Flushing Correctly
Verify that ush is enabled and what type of ush is
selected. Is ush enabled? If no, enable ush. If yes, press
the Alarm Silence/Reset key for three (3) seconds. Does
the unit show ush on the display? If no, replace the board.
If yes, is the ush LED, DS10 lit. If no, replace the board.
If yes, with a voltmeter, verify if there is power on the ush
terminals. Is there power? If no, replace the board. If yes,
check the valve and wiring.
No or Incorrect TDS/Conductivity Reading
Is the sensor wired correctly? If no, correct the wiring. If
yes, is the sensor installed as described in the installation
section? If no, install correctly. If yes, verify the correct
TDS/Conductivity range. Is the range correct? If no, correct
the range. If yes, calibrate the unit. Does the unit calibrate
OK? If no, disconnect the green and white wires of the
sensor. Does the reading show 0? If no, replace the board.
If yes, reconnect the wires and remove the sensor from the
piping and dry. Does the reading show 0? If no, replace
the cell. If yes, short the pins of the cell together. Does the
reading show ‘^^^’? If no, replace the board.

Page 16
S-150 RO CONTROLLER SETPOINTS
SETPOINT DESCRIPTION RANGE DEFAULT
VALUE
PRESET
VALUE
TDS/Cond Limit When this value is met or exceeded, the alarm lamp will light and high TDS/
Cond will show on the display. To disable, set to 0.
0 to 999
µs or ppm 100 100
TDS/Cond Delay When the limit setpoint is exceeded, no alarm will be given until this time has
expired.
0 to 999
sec 30 sec 30 sec
TDS/Cond Shtdwn Once a TDS/Cond alarm is active, if the time is exceeded, a TDS/Cond
shutdown will occur. To disable, set to 0.
0 to 99
min 0 min 0 min
RO Start Delay The length of time between the inlet valve opening and the RO pump start. 0 to 99
sec 5 sec 15 sec
Press Fault Delay The length of time a pressure fault must be active before a pressure fault
shutdown occurs.
0 to 99
sec 5 sec 5 sec
Auto Reset When a pressure fault shutdown is active, the system will attempt to restart
after this delay. If set to 0, system will remain shut down until manually reset.
0 to 99
min 60 min 60 min
Alarm Silence If the audible alarm is silenced, after this delay, the alarm will resound. If set to
0 minutes, the alarm will remain silenced.
0 to 99
min 0 min 0 min
TF Restart Delay When a tank full condition clears, the system will restart after this delay. 0 to 99
sec/min 5 sec 5 sec
TF Restart Selects whether the tank full restart delay is in seconds or minutes.
0 = seconds , 1 = minutes. 0 to 1 0 0
TFO Time The length of time that a tank full override lasts. 0 to 9
min 5 min 5 min
Tank Lo Restart When a tank low condition clears, the auxiliary pump will restart after this
delay.
0 to 99
min 15 min 15 min
Flush Type Selects the type of ush. Set to 0 to disable ush. 0 to 8 0 0 (Std)
8 (Opti)
Flush Time The length of time a membrane ush cycle will last when ush is active. 0 to 99
min 5 min 1 min
Flush Interval The interval between ush cycles. Only valid with op hour, elapsed time, or o󰀨
ush types.
0 to 99
hr 24 hr 24 hr
Flush Mode Selects if the inlet and RO pump relays operate during ush. 0 to 3 0 0 (Std)
3 (Opti)
Maximum Hours If the current operating hours exceed this limit, the operating hours warning
will occur. To disable, set to 0.
0 to 65000
hr 0 hr 0 hr
Current Hours Current number of hours of RO system operation. 0 to 65000
hr 0 hr 0 hr
Expander Mode Selects how the relays on the I/O expander board operate. 0 to 4 0 0
Temp O󰀨set Allows adjustment of the temperature reading by +/-5 degrees. -5° or +5° 0° 0°
Temp UOM Selects display of the temperature in °F or °C. 0 to 1 0 0
Switch Select Selects if the switch inputs are normally open or normally closed. 0 to 32 0 7
TDS/Cond UOM Selects display of the water quality in µs or ppm 0 to 1 0 1
TDS/Cond Range Selects the range of the TDS/Conductivity monitor.
0 = 50, 1 = 100, 2 = 250, 3 = 500, 4 = 1000, 5 = 2500, 6 = 5000. 0 to 6 2 1

Page 17
SYSTEM STARTUP PROCEDURE
STEP ONE
Installation Follow-up
1. Visually inspect the water connections.
2. Be sure the lter cartridges have been installed.
3. Conrm connection to the proper power source.
NOTE: The membrane element(s) will have been
installed in the system during the nal testing
procedures unless other arrangements have been
made with the manufacturer.
STEP TWO
RO System Pretreatment
A water analysis of your feed water should have been
performed to determine what type of pretreatment may
be required. See Feed Water Parameters in this manual
before operating this system.
STEP THREE
Read the Section on the RO System Controller
It is important to read the RO Microprocessor Controller
section carefully before attempting to operate this BLS RO
System, and before changing any controller settings.
STEP FOUR
Divert Product Water to Drain
Upon initial system startup, or after changing membrane
elements, it is important to divert all product water to a
wastewater drain for approximately 30 to 60 minutes.
Membrane elements are treated with a preservative
solution and should be thoroughly rinsed clean before
water is retained for use. This can be done either by
installing a 3-way valve in the product water line or by
diverting your product water line to drain. Do not connect
the product water line to a storage tank at this time.
STEP FIVE
Startup the System
1 Turn on the inlet feed water supply source, allowing
water to enter the system.
2. Manually adjust (counter-clockwise) the reject water
control valve to the fully open position.
3. Press the Power key on the RO controller. The inlet
solenoid valve will open, and the pump will start after a
short delay.
IMPORTANT! The inlet solenoid valve is a safety device
that is used to prevent water ow through the system
when it is not in operation. Low inlet feed water ow
and low pressure can result in damage to the pump,
motor, and/or membrane element. When the system
is turned on, the solenoid valve automatically opens.
The valve will close when the system is turned o. The
system will only start if there is sucient feed water
ow and pressure (35 psi minimum).
STEP SIX
System Flush
Allow the system to operate for 30 to 60 minutes to
properly ush the RO membranes of their preservation
solution. Please note that there are two di󰀨erent ways to
execute a membrane ush, based on the model of your RO
system:
Standard Models
All Standard (STD) models are equipped with a manual
ush valve. To perform a membrane ush, turn this valve
to the open position and allow the system to ush for the
desired amount of time. Note that this manual ush valve
must be in the closed position during system operation.
Optimum Models
All Optimum (OPTI) models are equipped with an
automatic ush solenoid valve. A one (1) minute automatic
membrane ush is pre-programmed to initiate each
time the system starts and stops. The membrane ush
type, frequency, and duration is pre-programmed to the
manufacturer’s default settings. Please see the S-150
RO Controller Setpoints section of this manual for more
information on the default settings. Note that a manual
ush can be initiated by holding down on the Alarm
Silence/Reset key of the RO controller.
STEP SEVEN
Adjust System Pressure and Flow Rates
CAUTION! Never allow the BLS RO system pressure to
exceed 185 psi.
The BLS 3000, BLS 6000, and BLS 9000 RO systems
were designed to operate at 70% recovery. This may
vary depending on your feed water conditions and/
or application. Adjust the reject water control valve and
pressure regulator, while monitoring the reject water ow
meter, product water ow meter, and system operating
pressure gauge. You will need to adjust the reject water
control valve and pressure regulator to balance and
maintain the 70% product water recovery ow rate. Refer
to the gpm ow rates listed below as a guideline.
NOTE! These ow rates should only be used as a
guideline. They have been determined based on the
Standard Test Conditions. Actual ow rates should be
determined based on your specic site conditions.

Page 18
SYSTEM STARTUP PROCEDURE
(continued)
IMPORTANT! The maximum product water ow rates
and associated reject water ow rates for the BLS
3000, BLS 6000, and BLS 9000 are shown below.
Reduce the system operating pressure, if required,
by adjusting the pressure regulator to maintain the
maximum product water ow rate and the associated
reject water ow rate.
BLS 3000 Models: 0.9 gpm reject water
2.1 gpm product water
BLS 6000 Models: 1.8 gpm reject water
4.2 gpm product water
BLS 9000 Models: 2.7 gpm reject water
6.3 gpm product water
Record all operating parameters on the System Log Sheet,
located at the end of this manual. Product and reject water
ow rates can be read directly from the ow meters and will
become a reference point for future system performance
evaluations.
NOTE! The gallons per day of product water produced
will vary at each installation based on the feed water
TDS, feed water temperature, and the back pressure
on the system. The purpose of recording the data on
the System Log Sheet at startup is to have a reference
point to evaluate system performance during the life of
the membrane element(s).
STEP EIGHT
Connect RO System to Storage Tank
1. After 30 to 60 minutes of system ushing, press the
Power key on the RO controller to stop the system.
2. Connect the product water line to your storage tank.
3. Once product water line is connected to the storage
tank, power the system back on. The RO system will
now automatically run based on the tank full switch.
STEP NINE
Check Pressure Switches
An inlet feed water low pressure switch is installed on this
BLS RO system. It is preset at the factory to cut-out at
feed water pressure below 15 psi and cut-on at pressure
above 20 psi. Its purpose is to prevent damage to the RO
system’s pump and/or motor if there is inadequate feed
water ow or pressure. The following steps are to verify
that it is functioning properly:
1. Slowly decrease the inlet feed water supply by closing
an installed manual feed water shuto󰀨 valve, while
watching the pre-lter outlet pressure gauge.
2. If you hear the pressure switch open (a quiet, but
audible click), when the pressure drops to about
15 psi, then the inlet pressure switch is functioning
correctly. After a short nuisance delay, the RO system
will go into a pressure fault shutdown.
3. If it is not functioning correctly, please see the System
Pressure Switches section of this manual for more
information.
If your RO system is equipped with the optional product
water pressure switch, please refer to the System Pressure
Switches section of this manual to verify its setpoints and
proper function.
STEP TEN
Final Inspection
Once all startup and installation procedures have been
completed, visually inspect all water connections and
system readings for proper operation. All connections
should be tight, secure, and leak-free.
NOTE! When humidity is high, expect condensation
to form on the parts of the system which contain cold
water.
IMPORTANT! Frequently check the system for any
leaks that may develop over time.
CAUTION! A water softener should not be allowed to
regenerate while the BLS RO System is operating,
unless safeguards are used to be sure the system
is shut down or operating on an alternate source
of softened water. Terminals for shutting down the
system during softener regeneration are provided.
A Normally Closed (NC) contact from the softener
controller can be wired to the pretreat terminals in
the RO controller. Bypassing the water softener and
feeding hard water directly to the BLS RO System will
cause premature fouling of the membrane element.

Page 19
FILTER CARTRIDGE INSTALLATION
& REPLACEMENT
IMPORTANT! Upon the purchase of a new BLS
RO System, the sediment lter cartridge has been
packaged loose inside the system’s carton. It must
be installed prior to startup. Note that the membrane
element(s) have been pre-installed by the manufacturer
during the nal testing procedures, unless other
arrangements have been made.
Filter cartridges have a limited service life and should be
replaced if you experience noticeable changes in product
water taste, color, odor, or ow rate. On average, lter
cartridges should be replaced about every three to six
months. Your BLS RO system is also equipped with pre-
lter inlet and pre-lter outlet pressure gauges. An increase
in the pressure di󰀨erence of 10 to 12 psi between the two
gauges is an indication that the lter cartridge may need to
be replaced.
1. Ensure feed water supply is turned OFF and that the
RO system is shutdown.
2. Relieve all pressure from the system by opening the
reject water valve and pressing the pressure relief
button on top of the pre-lter housing.
3. Disconnect the main power supply.
4. Unscrew the lter housing sump by turning clockwise.
Locate and remove the large o-ring, wipe clean, and
set aside. It is common for the o-ring to lift out of the
sump and stick to the cap. If the o-ring appears to be
damaged or crimped, it must be replaced.
5. If you are doing a routine maintenance change of the
lter cartridge, remove and dispose the old cartridge. It
is also recommended that the sump be properly rinsed
clean at this time. To sanitize the sump, ll it 1/3 full of
water and add about two (2) tablespoons of original
household bleach. Gently scrub the cap and housing
with a non-abrasive cloth. Observe the precautions
printed on the bleach container. Rinse thoroughly when
nished.
6. Ensure o-rings are lubricated with a food grade silicone
or glycerin. Place o-rings back into the groove in the
sumps and smooth into place with your ngers. This
step is important to ensure a proper watertight seal.
7. Remove packaging from the new lter cartridge and
place inside the sump. Make sure the lter is seated
properly over the standpipe at the bottom of the sump.
8. Replace the lter sump on the lter housing cap. DO
NOT OVERTIGHTEN. If your system has multiple pre-
lter housings, make sure the correct lter is replaced
in the correct position. See system labels and the
Getting To Know Your BLS RO System section of this
manual for more information.
9. Reconnect the main power supply.
10. Turn on the feed water supply and allow the system to
ll with water.
11. Push the Power button located on the face of the
S-150 RO Controller to restart the system.
12. Check for leaks.
13. Flush the system for a minimum of ve (5) minutes
while diverting the product water to the drain.
IMPORTANT! Before performing ant maintenance on
your BLS RO System, always disconnect the power
supply.
CAUTION! It is important that the o-ring be properly
seated each time the lter housing is reassembled
or removed. Use only food grade silicone or glycerin
to lubricate the o-rings. DO NOT USE A PETROLEUM
BASED PRODUCT SUCH AS VASELINE.
NOTE! The manufacturer of the lter housing
recommends that the lter sump of all plastic housings
be replaced every ve (5) years for a clear sump, and
every ten (10) years for an opaque sump. Date the
bottom of any new or replacement sump to indicate the
next recommended replacement date.

Page 20
SYSTEM PRESSURE SWITCHES
INLET LOW PRESSURE SWITCH
NOTE! The system is preset to cut OFF at inlet
pressure below 15 psi, and to cut ON at inlet pressure
above 20 psi.
An inlet low pressure switch is installed on every BLS RO
System. The purpose of this switch is to prevent damage
to the pump and/or motor if there is inadequate feed water
ow or pressure.
Verifying the Inlet Low Pressure Switch Setpoint
To verify the setting, slowly decrease the inlet feed
water supply by slowly closing the manual inlet shuto󰀨
valve while watching the prelter outlet pressure gauge.
If the system shuts down when the pressure drops to
approximately 15 psi, then the inlet low pressure switch is
functioning correctly.
CAUTION! Disconnect the power whenever the cover is
removed from a pressure switch.
Adjusting the Inlet Low Pressure Switch Setpoint
If it is not set correctly, disconnect the power from the
system and remove the black plastic cover of the pressure
switch labeled “Inlet Low Pressure Switch.” There are two
screws for adjusting the switch settings. DO NOT ADJUST
THE PLASTIC SCREW. Turn the brass screw clockwise
to increase both the cut-in and cut-out pressure. Turn it
counterclockwise to decrease both the cut-in and cut-out
pressure. Turn the screw one half turn only. Temporarily
replace the cover, reconnect the power, and recheck the
setting. Repeat as required.
Identifying a Broken Low Pressure Switch
Simply, close the inlet feed water valve, and if the system
does not shut down, the pressure switch needs replacing.
PRODUCT WATER PRESSURE SWITCH
(OPTIONAL)
NOTE! The system is preset to cut OFF at product
pressure above 45 psi, and to cut ON at product
pressure below 25 psi.
A product water pressure switch is available as an optional
feature. Its purpose is to stop and start the RO system
when a pressurized storage tank is used.
Verifying the Product Water Pressure Switch Setpoint
You will need a ball valve and pressure gauge (0 to 100
psi) assembly with a tube connection the size of the RO
system product tubing. You will also need a container to
catch the product water.
Disconnect the power from the system. Close the
pressurized storage tank shuto󰀨 valve. Open a valve
downstream of the pressurized storage tank to relieve the
pressure from the system. Disconnect the tubing from the
tank shuto󰀨 valve. Connect the ball valve/pressure gauge
assembly to this tubing. Open the ball valve and put it into
the container. Close the downstream valve. Reconnect the
power to the RO system. Slowly close the new ball valve.
If the RO system shuts down when the pressure gauge
reaches approximately 45 psi, the product water pressure
switch is functioning correctly.
IMPORTANT! Disconnect the power any time the cover
is removed from a pressure switch.
Adjusting the Product Water Pressure Switch
If it is not set correctly, disconnect the power to the RO
system and remove the black plastic cover of the pressure
switch labeled “Product Water Pressure Switch.” There
are two screws for adjusting the switch settings. DO NOT
ADJUST THE PLASTIC SCREW. Turn the brass screw
clockwise to increase both the cut-in and cut-out pressure.
Turn it counterclockwise to decrease both the cut-in
and cut-out pressure. Turn the screw one half turn only.
Temporarily replace the cover, reconnect the power, and
recheck the setting. Repeat as required. When the product
water pressure switch is set, reinstall the cover and tighten
the locking screw. Disconnect the power, remove the ball
valve or ball valve/pressure gauge assembly, reconnect the
system, and open the tank shuto󰀨 valve.
Identifying a Broken Product Water Pressure Switch
If the system does not shut down when the pressurized
storage tank is full, the product water pressure switch
needs replacing. If your system is equipped with a relief
valve below the switch, it should also be expected to
open and leak/spray water if the product water pressure
becomes too high.