OPERATING INSTRUCTIONS
MANOWNROSM
US Filter
12
G.
If your RO system is equipped with the reject recirculation option, set the reject
recirculation flow to zero, but DO NOT exceed pressure to membrane limits
(24.15 bar/350 psig). Open the reject valve further if necessary to avoid over
pressuring the system.
CAUTION
Do not use reject recirculation option for the first 24 hours of operation
to avoid recirculating preservative chemicals which can permanently
damage the membranes.
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 RO water storage tank or user system.
3.3
INITIAL FLUSHING OF THE SYSTEM
Since the RO membrane is shipped moist 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.
Place the outlet of the permeate at a convenient drain.
B.
Turn on the feedwater and the system pump (as outlined in Operating
Instructions, Initial Startup of the Reverse Osmosis System section of this
manual) and let the system run for 24 hours. This will flush residual bisulfite
solution and any particulate impurities from the membranes, housings and
plumbing of the system.
C.
Permeate quality will increase slowly for 1 hour. Monitor the inlet quality vs. the
permeate 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 permeate quality does not improve, refer to
section 5.0 Troubleshooting.
D.
After flushing, turn off the system and reconnect the permeate line. The system
is now ready to be put into a normal operating mode.
3.4
NORMAL OPERATIONS
The following procedure is for operating a U.S. Filter RO system that has been installed
and initial flushing has been completed. Refer to the Reverse Osmosis Controller,
Operating Instructions in the Appendix for control location and identification.
A.
Initiate operation by pressing the POWER button.
B.
If the controller is in the STANDBY or TANK FEED mode, allow the system to
complete the flush cycle before proceeding.
