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SYSTEM CAPACITY INPUTS
40
GNPR40L certified capacity at salt setting
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
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.
Example
of Lbs of Salt
req. per regen
CAPACITY (x 1,000)
GNPR40L GNPR48L
3.0 14.1
40
N/A
3.6 15.5 15.2
48
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 24.4
40
24.3
8.0 25.6 25.0
9.0 27.9 26.1
48
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 37.1
40
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 48.9
48