Operation and Maintenance Manual for

OPERATING INSTRUCTIONS LC Manual 11/02 Rev. 3
H. Set the percent rejection alarm setting to 90%.
I. Check for plumbing leaks and make appropriate repairs as necessary. All
systems are leak checked at the factory but vibration during transit can cause
new leaks to develop.
J. Once the system is checked out and operating correctly, place the controller in
the desired mode. Read the next section on initial flushing before directing
product water to the water storage tank or user system.
3.3 INITIAL FLUSHING OF THE SYSTEM
Since the RO membranes are shipped with sodium bisulfite preservative solution, initial
flushing of the system is required. Before operating a new system, and also after the
replacement of a RO membrane, perform the following steps:
A. Direct the product water to a convenient drain.
B. Ensure a steady feed water supply, turn on the system pump and let the system
run for four hours. This will flush residual bisulfite solution and any particulate
impurities from the membranes, housings and plumbing of the system.
C. Product quality will increase slowly for 1 hour. Monitor the inlet quality vs. the
product quality by observing the conductivity meter outputs.
NOTE: The system should have better than 90% rejection within 2 hours as the
membranes equilibrate. If the product quality does not improve, refer to
section 5.0 Troubleshooting.
D. After flushing product to drain for a minimum four hours, turn off the system and
reconnect the product line. The system is now ready to be put into a normal
operating mode. Refer to the Product Description/Equipment Specifications in
the Appendix for design flowrates and pressures.
3.4 NORMAL OPERATIONS
The following procedure is for operating a USFilter Reverse Osmosis System that has
been installed and initial flushing has been completed. Refer to the MC10 Controller
manual in the Appendix for detailed instructions.
Use this section for daily startup or to restart the system after a short-term shutdown.
A. BEFORE starting the RO unit, verify that the following conditions exist:
DEVICE CONDITION
Pump discharge throttling valve 1/4 to ½ OPEN
Reject throttling valve ¼ to ½ open
Reject recirc throttling valve 1/8 to 1/4 OPEN
Any valves in the reject to drain line OPEN
Any valves in the process supply line OPEN
Pre treatment equipment ready for use
3-2 USFilter