Installation Instructions
SALT PER REGEN AND CAPACITY (CONT.)
NOTE: Both SALT PER REGEN and CAPACITY inputs must be based on the SYSTEM CAPACITY INPUTS CHART.
How to determine correct salt dosage and capacity:
The correct salt dosage and capacity are determined based on the family size and water hardness. Use the following procedure and example:
•Daily Water Usage = number of persons in household x 80 gallons
For a family of 3
Daily Water Usage = 3 x 80 = 240 gallons/day
•Water Hardness – have the water tested or call your local water company. For this example, 20 grains is assumed.
•Calculate total grains used per day = gallons/day x hardness = grains/day
240 gallons/day x 20 grains = 4,800 grains/day
•Water softener should be set to regenerate every 5 days.
Req Capacity = 5 days x 4,800 grains/day = 24,000
•Use SYSTEM CAPACITY INPUT table to select capacity and determine lbs of salt per regeneration.
For GNPR40 use setting at 24,000 grains.
•Program the control: Capacity: 24,000 grains Lbs of Salt: 7.0
If water supply has a high level of sediment or iron, set system to regenerate every 3 days:
•Use the UP 
or DOWN 
button to select SALT PER REGEN.
•Press the SET button.
•Use the UP 
, DOWN 
and LEFT 
buttons to select SALT PER REGEN amount.
•Press the SET button to accept.
•Use the UP 
or DOWN 
button to select
CAPACITY.
•Press the SET button.
•Use the UP 
, DOWN 
and LEFT 
buttons to select correct capacity.
•Press the SET button to accept.
SYSTEM CAPACITY INPUTS
Example | CAPACITY (x 1,000) | |
of Lbs of Salt | ||
req. per regen | GNPR40L | GNPR48L |
3.0 | 14.140 | N/A |
3.6 | 15.5 | 15.248 |
4.0 | 16.5 | 15.5 |
5.0 | 19.0 | 18.0 |
6.0 | 22.0 | 21.0 |
7.0 | 24.0 | 23.5 |
7.5 | 24.440 | 24.3 |
8.0 | 25.6 | 25.0 |
9.0 | 27.9 | 26.148 |
10.0 | 30.0 | 30.0 |
11.0 | 31.9 | 31.5 |
12.0 | 33.6 | 33.0 |
13.0 | 35.1 | 34.0 |
14.0 | 36.4 | 35.2 |
15.0 | 37.140 | 36.0 |
16.0 | N/A | 37.0 |
17.0 | N/A | 38.0 |
18.0 | N/A | 39.8 |
19.0 | N/A | 41.0 |
20.0 | N/A | 41.5 |
21.0 | N/A | 42.0 |
22.0 | N/A | 43.0 |
23.0 | N/A | 44.0 |
24.0 | N/A | 45.2 |
25.0 | N/A | 45.9 |
26.0 | N/A | 46.5 |
27.0 | N/A | 47.2 |
28.0 | N/A | 48.948 |
40GNPR40L certified capacity at salt setting
48GNPR48L certified capacity at salt setting
NOTE: The 3.0 lbs salt setting (GNPR40L) and the
3.6lbs salt setting (GNPR48L) are certified using the 5 bump injector. The 7.5 lbs (GNPR40L), 15 lbs (GNPR40L), 9 lbs (GNPR48L) and 18 lbs (GNPR48L) are certified using the 4 bump injector.
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