5•Service
Doc. 065215-02 9/09 79
NOTE The pump will not operate properly unless the cartridge
is installed in the housing in the correct orientation.
Liquid flows through the check valve in the large single
hole and out the small double holes.
7. Install the inlet check valve assembly on the bottom of the primary pump
head. Install the outlet check valve assembly on the top of the head. Tighten
the check valves fingertight, and then use a wrench to tighten an additional
one-quarter to one-half turn.
8. Reconnect the liquid lines and the power cord. Turn on the ICS-900 main
power.
9. Prime the pump (see Section 3.6
).
10. When the ICS-900 is at operating pressure, check for leaks from the check
valves. Tighten a check valve a little more only if it leaks.
To clean the check valves:
1. Follow Step 1 through Step 4 in the check valve replacement procedure to
remove the check valve cartridges from the valve housings.
2. Place the check valve housings and cartridges in a beaker with methanol.
Sonicate or agitate the parts for several minutes.
3. Rinse each check valve housing and cartridge thoroughly with filtered
deionized water.
4. Follow Step 5
through Step 10 in the check valve replacement procedure to
reinstall the check valves.
Overtightening may damage the pump head and check valve housing
and crush the check valve seats.
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