11
GP6002.B
MAINTENANCE
The Sterisil
®
Ac is equipped with water quality monitoring as well as audible and visual alarms to alert you when
it is time to replace the cartridges. Use the chart below to estimate cartridge life expectancy based on your
source water quality.
ESTIMATING THE LIFE EXPECTANCY OF YOUR STERISIL
®
AC CARTRIDGES
Your Sterisil Ac unit is shipped standard with the 14 inch Ac-CXL cartridges. If there are size limitations in your
desired installation site and the Ac-CXL cartridges do not fit, Sterisil
®
also offers shorter, 12 inch cartridges (part
no. Ac-C).
To estimate the life expectancy of your cartridges, determine your source water TDS reading. To do this, turn on
the blue water quality monitor on the faceplate of the Sterisil
®
Ac by pressing the silver on/off button in the upper
right hand corner of the monitor. Ensure that the white slider is to the left next to
Source.
Record the number
now displayed in the LCD window
(NOTE: this number may change while you are attempting to take the reading,
simply record the highest number that it displays).
On the horizontal axis of the graph below, locate your Source
TDS reading and trace a line vertically until it touches the red, Ac-CXL curve (or blue, Ac-C curve if you are using
the space saving Ac-C cartridges). Next, trace a line horizontally to the left until it meets the vertical axis. This
axis denotes the estimated number of gallons of deionized water your Sterisil
®
Ac will produce before cartridge
replacement is necessary.
