12
13
Dispensing Faucet, in the following order,
close the Faucet and then open the Holding
Tank Valve.
•Do not open the Faucet for at least 8 hours.
•Discard the first three full tanks of water
produced, they will contain chlorine.
C. Changing the In–Line Activated Carbon Post
Filter
1. Close the Feed Water Saddle Valve by turning
fully clockwise.
2. Close the Holding Tank Valve and then open
the Dispensing Faucet to release the pressure.
3. Remove the In–Line Activated Carbon Post
Filter. Disconnect the used Post Filter by
pressing in the connector’s collar and at the
same time pulling the tube out of the fitting.
4. Firmly reconnect the polytubes to the new Post
Filter. (Refer to Fig. 5). Make sure the tubing is
pressed all the way in to create a pressure tight
connection.
NOTE: If you want to pull the tubing out for some
reason, push the ring around the tubing in and
pull the tubing out.
5. Slowly open the Feed Water Saddle Valve.
6. When water begins dripping out of the Faucet,
in the following order, close the Faucet and
open the Holding Tank Valve. When the
Faucet is first opened, expect air and carbon
fines (very fine black powder), from the new
Post Filter to be rinsed out. This is normal for
the first tank of water.
SECTION VI. TECHNICAL DATA
A. Water Quality
Water quality is normally measured with a special
meter that measures the water’s ability to conduct
electricity. The more dissolved solids in the water,
the higher the conductivity. The results are usually
reported in
Parts per Million
(ppm) or
Milligrams
per Liter
(mg/l) of
Total Dissolved Solids
(TDS).
(Although technically they are not exactly equal,
in most discussions ppm = mg/l.)
R.O. Membranes are rated by the amount of
dissolved solids that are rejected. This rating is
a ratio of the TDS in the feed water to the TDS
in the product water and is reported as
Percent
Rejection
. If the feed water contained 100 ppm of
TDS and the product water contained 10 ppm of
TDS, 90 ppm have been rejected and the reject
ratio is 90%.
Percent Rejection =
Feed TDS–Product TDS x 100%
Feed TDS
EXAMPLE: Feed water is 500 ppm TDS and the
product water is 75 ppm TDS.
Percent Rejection = 500 – 75 x 100%
500
Percent Rejection = 0.85 x 100% or 85%
B. Water Quantity
Water quantity is termed
Flux
or
Product Water
Rate
and is measured as the amount of water
produced in one day. It is reported as
Gallons per
Day
(gpd) or
Liters per Day
(lpd).
The flow of water to drain is the
Reject Water
Rate
and is measured as
Gallons per Day
(gpd) or
as
Milliliters per Minute
(ml/min).
Milliliters per minute x 0.38 = gallons per day
EXAMPLE: The drain flow will fill a graduated
cylinder to the 150 ml mark in one minute.
150 ml/min. x 0.38 = 57 gpd
OUT
IN
In-Line Activated
Carbon Post Filter
3/8" Blue
To
Dispensing
Faucet
3/8" Blue
IN–LINE ACTIVATED CARBON
POST FILTER ASSEMBLY
Figure 5