US Water Systems L1-200 User manual

1REVISION 1.0, 1-19-15
US Water Systems 300 GPD
Premium Wall-Mount Light Commercial
RO System

2REVISION 1.0, 1-19-15
TABLE OF CONTENTS
INTRODUCTION...............................................................................................................................3
SAFETY.............................................................................................................................................4
FEED WATER AND OPERATION SPECIFICATIONS ....................................................................5
REJECTION, RECOVERY AND FLOW RATES ..............................................................................6
SYSTEM INSTALLATION AND START-UP PROCEDURES ..........................................................7
SYSTEM CONFIGURATION DRAWINGS…..…………………………………………………………..9
MEMBRANE ELEMENTS ...............................................................................................................10
SYSTEM IDENTIFICATION............................................................................................................11
MEMBRANE INSTALLATION, REMOVAL AND REPLACEMENT................................................12
OPERATION DO’S AND DON’TS ..................................................................................................15
SPECIFICATIONS...........................................................................................................................16
OPERATION AND MAINTENANCE ...............................................................................................18
PREPARING UNIT FOR STORAGE OR SHIPMENT ....................................................................19
REVERSE OSMOSIS TROUBLESHOOTING................................................................................20
TEMPERATURE CORRECTION FACTORS FOR MEMBRANE...................................................21
SERVICE ASSISTANCE.................................................................................................................21
OPERATION LOG...........................................................................................................................23
SYSTEM DRAWING .......................................................................................................................24
L1-200 SERIES FLOW DIAGRAM..................................................................................................25
L1 - SERIES ELECTRICAL SCHEMATIC 110V/60HZ...................................................................26
L1 - SERIES ELECTRICAL SCHEMATIC 220V/50HZ...................................................................27
REVERSE OSMOSIS SYSTEM WARRANTY................................................................................28

3REVISION 1.0, 1-19-15
INTRODUCTION
The US Water Systems 300 GPD Light Commercial RO System is a durable piece of
equipment which, with proper care, will last for many years. This User’s Manual outlines
installation, operation, maintenance and troubleshooting details vital to the sustained per-
formance of the system.
If the RO system is altered at the site of operation, or if the feed water conditions
change, please consult US Water Systems for assistance.
NOTE: IN ORDER TO MAINTAIN THE MANUFACTURER’S WARRANTY,
AN OPERATING LOG SHOULD BE MAINTAINED. COPIES MAY NEED
TO BE SENT TO US WATER SYSTEMS FOR REVIEW.
NOTE: PRIOR TO OPERATING OR SERVICING THE REVERSE OSMO-
SIS SYSTEM, THIS USER’S MANUAL MUST BE READ AND FULLY
UNDERSTOOD. KEEP THIS AND OTHER ASSOCIATED INFOR-
MATION FOR FUTURE REFERENCE. THESE DOCUMENTS CAN BE
USED TO TRAIN NEW OPERATORS OR QUALIFIED PERSONNEL
THAT MAY BE NEAR THE SYSTEM.

4REVISION 1.0, 1-19-15
SAFETY
The Safety section of this User’s Manual outlines the various safety headings used
throughout this manual’s text and are enhanced and defined below:
NOTE: INDICATES STATEMENTS THAT PROVIDE FURTHER INFORMATION AND
CLARIFICATION.
CAUTION: INDICATES STATEMENTS THAT ARE USED TO IDENTIFY CON-
DITIONS OR PRACTICES THAT COULD RESULT IN EQUIPMENT OR OTHER
PROPERTY DAMAGE.
WARNING: INDICATES STATEMENTS THAT ARE USED TO IDENTIFY CON-
DITIONS OR PRACTICES THAT COULD RESULT IN INJURY OR LOSS OF
LIFE. FAILURE TO FOLLOW WARNINGS COULD RESULT IN SERIOUS INJU-
RY OR EVEN DEATH.
DO NOT UNDER ANY CIRCUMSTANCE REMOVE ANY CAUTION, WARNING,
OR OTHER DESCRIPTIVE LABELS FROM THE SYSTEM.
PLEASE READ THE ENTIRE MANUAL BEFORE PROCEEDING WITH THE
INSTALLATION AND STARTUP. FAILURE TO FOLLOW THE ATTACHED
INSTRUCTIONS OR OPERATING PARAMETERS MAY LEAD TO THE
PRODUCT’S FAILURE, WHICH CAN CAUSE PROPERTY DAMAGE AND/OR
PERSONAL INJURY.
 DO NOT USE WHERE THE WATER IS MICROBIOLOGICALLY UNSAFE OR OF UN-
KNOWN QUALITY WITHOUT ADEQUATE DISINFECTION BEFORE OR AFTER THE
SYSTEM.
 PRETREATMENT MUST BE SUFFICIENT TO ELIMINATE CHEMICALS, ORGANICS OR
INORGANICS THAT COULD ATTACK THE MEMBRANE MATERIAL.
 ALWAYS TURN OFF THE UNIT, SHUT OFF THE FEED WATER, AND

5REVISION 1.0, 1-19-15
DISCONNECT THE ELECTRICAL POWER BEFORE WORKING ON THE UNIT.
 NEVER ALLOW THE PUMP TO RUN DRY.
 NEVER ALLOW THE UNIT TO FREEZE OR OPERATE WITH A FEED WATER TEM-
PERATURE ABOVE 100°F.
FEED WATER AND OPERATION SPECIFICATIONS
NOTE: IT IS VERY IMPORTANT TO MEET THE MINIMUM FEED
WATER REQUIREMENTS. FAILURE TO DO SO WILL CAUSE
THE MEMBRANE TO FOUL PREMATURELY AND VOID THE
MANUFACTURER’S WARRANTY.
OPERATING LIMITS
Operating Parameters:*
Feed Water Requirements:**
**If any of the feed water parameters are not within the limits given, consult your local dealer or
distributor for assistance.
Feed Temperature 40 - 85°F
System Inlet Pressure 45 - 85 PSIG
Maximum Operating Pressure (@77°F) 120 PSIG (Nominal)
Maximum SDI Rating < 3
Maximum Turbidity 1 NTU
Maximum Free Chlorine and/or Chloramines 0 PPM
pH (continuous) 3 - 11
pH (cleaning - 30 min.) 2 - 12
NOTE: HIGHER TDS AND/OR LOWER TEMPERATURES WILL RE-
DUCE THE SYSTEM’S PRODUCTION. 2% OF THE SYSTEM OUT-
PUT CAN BE LOST FOR EVERY DEGREE “F” BELOW 77.

6REVISION 1.0, 1-19-15
REJECTION, RECOVERY AND FLOW RATES
US Water Systems 300 GPD Reverse Osmosis Systems are designed to produce perme-
ate water at the capacities indicated by the suffix in the system’s name under the condi-
tions listed above. For example, the US Water Systems 300 GPD Reverse Osmosis Sys-
tem produces 300 gallons per day of permeate water at the listed operating test condi-
tions.
The amount of total dissolved solids (TDS) rejected by the membrane is expressed as a
percentage. For example, a 98.5% rejection rate means that 98.5% of total dissolved solids
do not pass through the membrane. To calculate the % rejection, use the following formu-
la:
% Rejection = [(Feed TDS – Product TDS) / Feed TDS] x 100
Example:
98.5% = [(550-8.25)/550] x 100
NOTE: ALL TDS FIGURES MUST BE EXPRESSED IN THE SAME UNITS, TYPI-
CALLY PARTS PER MILLION (PPM) OR MILLIGRAMS PER LITER (MG/L).
US Water Systems 300 GPD Reverse Osmosis Systems are designed to reject up to
98.5% NaCl, unless computer projections have been provided or stated otherwise.
The amount of permeate water recovered for use is expressed as a percentage. To cal-
culate % recovery, use the following formula:
% Recovery = (Product Water Flow Rate / Feed Water Flow Rate) x 100
Example:
28% = (0.14/0.50) x 100
NOTE: ALL FLOW RATES MUST BE EXPRESSED IN THE SAME UNITS,
TYPICALLY GALLONS PER MINUTE (GPM).

7REVISION 1.0, 1-19-15
SYSTEM INSTALLATION AND START-UP PROCEDURES
1. Inspect the system for any damage that could have occurred during shipment. Although all sys-
tems have been individually inspected, complete a quick inspection of the fittings, tubing and other
components.
2. Please provide a reasonable amount of space for installation and leave 6 inches of space below the
filter housings for easy removal during maintenance endeavors.
NOTE: THE REVERSE OSMOSIS SYSTEM SHOULD BE INSTALLED
INDOORS AND IT IS SUGGESTED THAT IT NOT BE IN DIRECT SUNLIGHT OR
EXTREME COLD.
3. Connect the 3/8” tube fitting to an incoming water source. The minimum feed water pressure
should be at least 30 psi. The system’s minimum operating (membrane) pressure is 80 PSI, but the
optimum operating pressure is 100 psi.
NOTE: DO NOT OPERATE AT A PRESSURE EXCEEDING 125 PSI. The operating
pressure can be increased on the face of the booster pump by turning the hex screw clock-
wise.
4. Connect the concentrate 3/8” tubing (waste) line to drain.
5. Turn on the feed water and plug the booster pump transformer into a power supply of 110 volts 60 Hz.
6. This system has been designed with an auto-flush restrictor. This restrictor automatically flushes the
reverse osmosis system for 30 seconds every time it starts up and once every hour when the system is
producing water.
NOTE: THE TANK PRESSURE SWITCH WILL SHUT THE SYSTEM OFF
AUTOMATICALLY WHEN THE BLADDER TANK IS FULL.

8REVISION 1.0, 1-19-15
7. The sediment filter and carbon must be serviced regularly for optimal performance. The water quali-
ty should be checked every two weeks minimum. The pre-filters should be checked once a month
over the first 3 months of operation to determine the filter change frequency. Typically most appli-
cations will not need to change the filters more than twice annually. However, in some applications
sediment or other contaminants in the feed water may require a more frequent filter change.
8. Dispose of the initial product (clean) water until the TDS level/conductivity of the product water sta-
bilizes at the lowest (cleanest) value. Use any TDS or Conductivity meter to monitor the product wa-
ter quality. A minimum quality of 96% NaCl rejection is recommended (See the rejection rate calcu-
lation).
9. Once the system has been flushed and the TDS level has stabilized, the permeate/product line can
be attached to the storage tank. Additional flushing of the storage tank and distribution system
may be required to reach the TDS level that is produced directly after the RO system at all points of
use.
10. This system has been factory wired and preset with a pressure switch at 20 - 40 psi, which is only to
be used with a pressurized bladder tank. If using an atmospheric storage tank, a float switch will be
required to turn the system on and off. An electric float switch can be used. The main power can
be switched by using a “piggy back” connector type float switch or an outlet can be wired to switch
power on and off utilizing a float switch. US Water uses an outlet configuration float switch for the
300 GPD RO system. Please see the following typical float diagram and complete system layout.
NOTE: ANY CHLORINE EXPOSURE WILL DAMAGE THE MEMBRANE.

9REVISION 1.0, 1-19-15

10 REVISION 1.0, 1-19-15