Aqua-Pure AP-RO5500 - Manual (Page 14)

Installation, Operation and Maintenance Manual
13
17. Maintenance
Reverse Osmosis drinking water fi ltration systems contain treatment components that are critical for effec-
tive reduction of Total Dissolved Solids as well as inorganic chemical contaminants. We strongly recom-
mend that the user test the water periodically (every six months minimum) to verify that the system is per-
forming satisfactorily. A Percent Rejection (PR) Water Quality Monitor is available to provide the user with
a means to test the water at any time. Routine maintenance is necessary in the form of prefi lter, postfi lter
and membrane replacement.
Replacing Filter Cartridges
The life of fi lter cartridges generally depends on local water conditions (i.e., dirt, rust and/or chlorine levels)
and by the length of service.
When to Replace Filters
A) Every six months, at the rated capacity or sooner if a noticeable reduction in fl ow rate occurs.
B) A noticeable decrease in water production is an indication that the fi lters require changing.
C) A decrease in water quality would be an indication.
How to Replace Prefi lter and Postfi lter Cartridges
A) Lift up on the faucet handle to drain the tank. Close the cold water feed valve. Wait fi ve (5) minutes for
the fi ltration assembly to completely depressurize.
B) Twist the fi lter cartridge 1/4 turn to the left (counterclockwise) so that the ears on the cartridge are
able to disengage from the head. Then pull cartridge from the head. (It may be necessary to twist the
cartridge slightly from side to side to help free it.)
C) Remove new fi lter cartridges and the sanitary sealed wrapper from the box. Double check to see that
it is the correct replacement fi lter cartridge by comparing the labels.
D) Using tap water, wet the o-ring seals to make insertion easier.
E) Line up the cartridge ears, insert cartridge and push into the head until fully seated. Twist the cartridge
1/4 turn to the right (clockwise) to lock in place.
F) Open the cold water feed valve and carefully check for leaks.
G) RO System Flush Instructions:
Prefi lters — Close tank. Lift the faucet handle and fl ush at least one (1) gallon of water through the
system (approximately 10 minutes).
Postfi lters — Install. Open tank. Lift the faucet handle and fl ush at least one (1) gallon of water through
post fi lter (approximately 30 minutes with tank empty or 5 minutes with tank full). It may be necessary
to continue fl ushing until water becomes clear.
Replacing RO Membrane Module
The life of the RO membrane depends on local water chemistry and proper maintenance, e.g., regular fi lter
changes. Under typical conditions, the RO membrane life ranges from eighteen (18) months to three (3)
years because of its self cleaning feature.
The RO membrane should be replaced as determined by an optional percent rejection (PR) monitor. The
monitor is factory preset so that a green light will be displayed when the water quality is good, and a red
or yellow light indicates that replacement may be necessary. If a red or yellow light is displayed, the faucet
should be opened and the storage tank drained. After it has refi lled, check the system again. If a red or yel-
low light is still displayed, the membrane should be replaced.
Recommended service life of the RO membrane is 36 months, maximum.
To reduce the risk associated with property damage due to water leakage:
• The disposable fi lter cartridge MUST be replaced every six (6) months, at the rated capacity or sooner if a
noticeable reduction in fl ow rate occurs.
CAUTION