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SALT PER REGEN AND CAPACITY
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
PER REGEN.
• Press the SET button.
• Use the UP
, DOWN
select SALT PER REGEN amount.
• Press the SET button to accept.
• Use the UP
or DOWN
CAPACITY.
• Press the SET button.
• Use the UP
, DOWN
select correct capacity.
• Press the SET button to accept.
Installation Instructions
(CONT.)
button to select SALT
and LEFT
buttons to
button to select
and LEFT
buttons to
SYSTEM CAPACITY INPUTS
Example
of Lbs of Salt
GNPR40L
req. per regen
3.0
14.1
3.6
4.0
5.0
6.0
7.0
7.5
24.4
8.0
9.0
10.0
11.0
12.0
13.0
14.0
15.0
37.1
16.0
17.0
18.0
19.0
20.0
21.0
22.0
23.0
24.0
25.0
26.0
27.0
28.0
GNPR40L certified capacity at salt setting
40
48
GNPR48L certified capacity at salt setting
NOTE: The 3.0 lbs salt setting (GNPR40L) and the
3.6 lbs 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.
13
CAPACITY (x 1,000)
GNPR48L
40
N/A
15.5
15.2
48
16.5
15.5
19.0
18.0
22.0
21.0
24.0
23.5
40
24.3
25.6
25.0
27.9
26.1
48
30.0
30.0
31.9
31.5
33.6
33.0
35.1
34.0
36.4
35.2
40
36.0
N/A
37.0
N/A
38.0
N/A
39.8
N/A
41.0
N/A
41.5
N/A
42.0
N/A
43.0
N/A
44.0
N/A
45.2
N/A
45.9
N/A
46.5
N/A
47.2
N/A
48.9
48
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Troubleshooting
