Rheem RHS42 Installation And Operation Manual page 13

Programming the Water Softener
STEP 2. SET WATER HARDNESS NUMBER
If you completed the previous step, the word "HARD -
NESS" should show in the display. Otherwise, press
the SELECT button several times until it does.
s
1. Press the UP or
hardness of your water supply, in grains per gallon.
The default is 25.
NOTE: If your water supply contains iron, compen-
sate for it by adding to the water hardness
number. For example, assume your water is
20 gpg hard and contains 2 ppm iron. Add 5
to the hardness number for each 1 ppm of
iron. In this example, you would use 30 for
your hardness number.
2 ppm iron x 5 = 10
(times)
2. When finished setting your water's hardness num-
ber, press the SELECT button, and the display will
change to show the "Recharge Time" screen.
STEP 3. SET RECHARGE (REGENERATION)
START TIME
If you completed the previous step, the words "RE -
CHARGE TIME" should show in the display. Otherwise,
press the SELECT button several times until they do.
1. The softener's default recharge start time is 2:00
AM. This is normally a time of day when water is
not being used in the household. Hard water
bypasses the softener if the household draws
water during the recharge cycle. If a different
recharge start time is desired, press the
s
DOWN buttons to change the time, in 1-hour
increments. Be sure AM or PM is correct.
FIG. 21
DOWN buttons to set the
20 gpg hardness
+10
30 HARDNESS NUMBER
FIG. 22
UP or
2. When the desired recharge start time is displayed,
press the SELECT button, and the display will
change to show one of the salt type screens in
Fig. 23.
STEP 4. SET SALT TYPE
If you completed the previous step, either "NaCl" (for
Sodium Chloride) or "KCl" (for Potassium Chloride)
should show in the display. Otherwise, press the
SELECT button several times until one of them does.
1. Press the
UP or
type of salt you will be using in your water softener.
The default is NaCl (standard Sodium Chloride
water softener salt). If you will be using KCl
(Potassium Chloride) instead, be sure to set salt
type to KCl. This setting adjusts the regeneration
cycle times to compensate for the different rate at
which KCl dissolves. See also Page 19 for more
information on salt types.
2. When the correct salt type is displayed, press the
SELECT button. The display returns to the normal
time of day screen.
13
FIG. 23
s
DOWN buttons to set the
FIG. 24