Flow HYPLEX, Manual, Page: 83 / 100

Changing the filter elements
Change the filter elements if the post-filter pressure is roughly less than 18 psi when the pump is running. The pump
will automatically shut down when pressure is below 15 psi.when the pump is running.
Note: Check filter pressure gauges only when pump is
running at full speed and operating at full UHP output
pressures. When the pump is stopped, the pressures will
increase substantially, even with a dirty filter.
Service steps
1. Shut down the system.
2. Close the water inlet source valve.
3. Remove the filter canisters using a strap wrench.
4. Remove the filters from the canisters and discard.
CAUTION
Using dirty or incorrect filter
elements can shorten pump life.
5. Inspect the contents of the canister.
Note: This inspection can provide early warning of a
change in inlet water quality. Filter life and inlet wa-
ter quality are directly related.
6. Clean the canisters and install new filter cartridges.
CAUTION
The 0.5
m
and 1.0
m
cartridges must be installed
in the correct position as labeled on the
pump—failure to do so could shorten pump life.
7. Re-assemble the filter canisters to the filter housing
using a strap wrench.
8. Open the water inlet source valve. Check for leaks.
CAUTION
You must open the water inlet source valve before
starting the pump—failure to do so could
severely damage the pump.
9. When the filter canisters are pressurized, it is neces-
sary to remove air from the system by pressing the
red pressure-relief buttons located on top of the fil-
ter housings.
10. Enter the date and/or hours of operation from the
hour meter into the service log.
© Flow International Corporation
M-416 | 83
CHAPTER 4
Service