SECTION 4-2
OPERATION
FLOWMAX RO MANUAL REV: B 05/1999
USFilter
United States Filter Corporation
protect the low pressure pump seals and PVC piping from over pressurization.)
2.
If applicable, fully open the manual product divert to drain valve. Verify there is no
obstruction of this valve. If the automatic divert valves were installed, they will
automatically divert to drain when the system is off.
3.
Close the air supply valve going to the solenoid valves.
4.
Verify that the manual feed water valve (V-1) is fully closed.
5.
Fully open the reject valves (V-7 & 8).
6.
Manually override the RO unit automatic feed water valve and open this valve. This will
allow the RO unit to flush while the power is off. This can be done by applying an air
supply directly to the valve actuator.
Always open the manual valves slowly to prevent water hammer from damaging
the piping and components.
7.
Remove the Lock-out/Tag-out equipment from the manual feed water isolation valve (V-
1). Slowly open the valve to allow water flow into the RO unit.
8.
Verify flow through the unit by checking the feed inlet pressure gauge on the wet
instrument panel. Check for water flow out of the reject drain line.
9.
Allow the flushing process to run for a minimum of 15-30 minutes. This will assure all
the membrane preservatives will be flushed out.
10.
When flushing is complete, re-connect the air lines and return the valves to the operating
position.
CAUTION
