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SALT PER REGEN AND CAPACITY
These two settings are required to provide the most
efficient operation of the system in your installation.
Salt efficiency is improved by regenerating part of
the capacity. For example, the GNPR40 has 37,100
grains of capacity. It is more efficient to regenerate
20,000 grains of capacity more frequently than
waiting and regenerating the complete 37,100
grains.
Both SALT PER REGEN and CAPACITY are
determined based on the chart on page 13.
FOR CALIFORNIA INSTALLATIONS:
• California regulations require the control setting
to yield 4,000 grains of capacity per pound of salt.
To meet these requirements, the SALT PER REGEN
and CAPACITY must be set no higher than
indicated below:
12
Installation Instructions
TIME OF REGENERATION
The system has a default setting of 2:00 a.m.
To change:
• Use the UP or DOWN button to select a new
time for regeneration.
• Use procedure in SET PRESENT TIME OF DAY.
• Press the SET button to accept.
TOTAL WATER HARDNESS
Water hardness is the hardness of the supply water
to the house in grains per gallon. The system has a
default setting of 25 grains/gallon.
A water test should be performed at the time
of installation to determine your water hardness
(grains/gallon). You can get the grains per gallon
(gpg) hardness of your water supply from a water
analysis laboratory. If you are on a municipal
supply, call your local water department. If your
report shows hardness in parts per million (ppm),
simply divide by 17.1 to get the equivalent number
of grains per gallon.
To change:
• Use the UP or DOWN button to select total
water hardness.
• Press the SET button.
• Change the digits by using the UP , DOWN
or LEFT button.
• Press the SET button to accept.
Model Capacity Default Salt Default
GNPR40L 16.5 KGr 4.0 lbs
GNPR48L 15.2 KGr 3.6 lbs
GNPR48L
Capacity (1,000 grains)
Salt Setting (lbs)
30
25
20
15
10
5
0
01020304050
GNPR40L
Capacity (1,000 grains)
Salt Setting (lbs)
30
25
20
15
10
5
0
01020304050