-4-
C-Series 1" & 1-1/4" WS1 Manual
Control Valve Function & Cycles of Operation
Table 4 shows the order of the cycles when the valve
is set up as a filter. When the control valve is used as a
downflow regenerating filter, the OEM has the option to
specify one backwash or two backwashes. If the control
valve is set to regenerate for a filter, the OEM has the op-
tion of having the regenerant refill after the rinse cycle or
have the regenerant prefill before regeneration. If the OEM
chooses to have the regenerant prefill before regeneration,
the prefill starts two hours before the regeneration time
set. During the 2-hour period in which the regenerant is
being made, treated water is still available. For example:
regeneration time = 2:00 am, prefill option selected,
downflow filter. Fill occurs at 12:00 a.m., start of back-
wash cycle occurs at 2:00 a.m. There is only one rinse.
Backwashes can be set to normal or longer. The option
selected will apply to all backwashes. Tables 5 and 6 show
the length of the cycles when the valve is set up as a filter.
When the control valve is used as a non-regenerating
filter, the OEM has the option to specify one backwash or
two backwashes. If two backwashes are specified, two
rinses occur. Tables 5 and 6 show the length of the cycles
when the valve is set up as a filter. When used as a non-
regenerating filter, the downflow piston must be installed,
the regenerant piston removed, injector plugs must be
installed in both the DN and UP injector locations and the
refill elbow must be replaced with a refill port plug.
Table 4 - Regeneration Cycles Softening
Table 2 - Backwash Normal Length Softener
Cycle Times in Minutes
WS1 & WS1.25 Downflow Softener
Grains Capacity/lb NaCl 6000 to 3501 3500 to 2501 2500 to 1700
lbs NaCl/cu ft resin
2
Less than 7.5 7.5 to 12 More than 12
Backwash Normal
6
8
8
Regenerate
45
60
75
Backwash Normal
3
8
10
Rinse
3
4
6
Total
3
57
80
99
WS1 & WS1.25 Upflow Softener
Grains Capacity/lb NaCl 6000 to 3501 3500 to 2501 2500 to 1700
lbs NaCl/cu ft resin
2
Less than 7.5 7.5 to 12 More than 12
Backwash Normal
Regenerate
45
60
75
Backwash Normal
6
10
12
Rinse
3
4
6
Total
3
54
74
93
Cycle Time In Minutes
Cycle Time In Minutes
Table 3 - Backwash Longer Length Softener
Cycle Times in Minutes
WS1 & WS1.25 Downflow Softener
Grains Capacity/lb NaCl 6000 to 3501 3500 to 2501 2500 to 1700
lbs NaCl/cu ft resin
2
Less than 7.5 7.5 to 12 More than 12
Backwash Longer
8
10
12
Regenerate
45
60
75
Backwash Longer
8
10
12
Rinse
4
6
8
Total
3
65
86
107
WS1 & WS1.25 Upflow Softener
Grains Capacity/lb NaCl 6000 to 3501 3500 to 2501 2500 to 1700
lbs NaCl/cu ft resin
2
Less than 7.5 7.5 to 12 More than 12
Backwash Longer
Regenerate
60
70
80
Backwash Longer
12
14
16
Rinse
5
7
9
Total
3
77
91
105
Cycle Time In Minutes
Cycle Time In Minutes
2
These are reference numbers that approximate the amount of salt
needed. The actual capacity in grains per pound of salt is used in
calculations.
3
Total time does not include fill time, which is dependent upon the
amount of salt needed. When in the fill mode the system is providing
treated water.
1st 2nd 3rd 4th 5th 6th
Cycle Cycle Cycle Cycle Cycle Cycle
WS1 & WS1.25 Downflow Regenerant Refill After Rinse
Backwash Regen
2nd BW*
Rinse
Fill
Service
WS1 & WS1.25 Downflow Regenerant Prefill
Fill
Backwash
Regen
2nd BW*
Rinse
Service
WS1 & WS1.25 No Regeneration
Backwash
Rinse
2nd BW* 2nd Rinse** Service
N/A
* - Second backwash is optional
** - Second rinse only occurs if Second Backwash option is selected.
