Figure 5, Manual bypass (figure 5) – Hydrotech 2510 AIO SXT Chemical Free Iron Filter Operation Manual User Manual
Page 14
12
Section 6: Backwashing Instructions
To Calculate Backwash Frequency -
Normal Applications
Backwash frequency for households with average water use can
be determined using the following guides. The guide cannot be
used if the filtered water supplies a swimming pool, geothermal
pump, outside spigots or other high water demand devices or
activities. If your application includes any of the foregoing refer to
the paragraph on “Special Applications” below.
1. Locate the box intersected by the number of people in your family and the parts per million (ppm) of iron in your water (if your ppm is
between two numbers on the guide, use the higher number.)
2. The number in the box represents how many times your filter has to backwash in a twelve day schedule.
Example: You have four in the family and 8 ppm of iron. Refer to the guide and locate the box intersected by four in the family and 8
ppm of iron. The figure supplied is 2. This means your filter control should be programmed to backwash twice in twelve days - that is
every sixth day. If the figure had been 3 it would mean 3 backwashes in twelve days or every fourth day.
To Calculate Backwash Frequency - Special Applications
To ensure adequate reserve capacity and prevent loss of water pressure between backwashes the figure of 15,000 (not the full
30,000 ppm capacity) is used to calculate backwash frequency. Determine your backwash frequency as follows:
1. Estimate daily iron removal requirements using the following calculation:
No. of people in family
x 75 gallons of water per person
+ No. of gallons of water for special use
= No. of gallons of water required per day
x Iron concentration (ppm)
= Daily iron removal requirements (ppm)
2. Establish backwash frequency using daily iron removal to complete the following calculation:
15,000 iron removal capacity (ppm)
÷
Daily iron removal requirements (ppm)
= No. of backwashes required in 12 day schedule
Example: You have four in the family, 8 ppm of iron and a swimming pool requiring 46 gallons of water per day.
4 People in the family
x 75 Gallons of water per person
300 Gallons of water for family
+ 46 Gallons of water for the pool
346 Gallons of water required per day
x 8 Iron concentration
2,768 Daily iron removal requirements (ppm)
15,000 Iron removal capacity (ppm)
÷2,768 Daily iron removal requirements (ppm)
5.4 Backwash frequency (days)
The calculation indicates the need to backwash every 5.4 days. The control can only be programmed to backwash at intervals of two,
three, four, six and twelve days. The control would be programmed to the closest more frequent setting i.e. every four days.
Manual Bypass (Figure 5)
In the case of emergency, such as an overflowing brine tank, you can isolate your water
softener from the water supply using the bypass valve located at the back of the control.
In normal operation the bypass is open with the on/off knobs in line with the inlet and outlet
pipes. To isolate the softener, simply rotate the knobs clockwise (as indicated by the word
BYPASS and arrow) until they lock.
You can use your water related fixtures and appliances as the water supply is bypassing
the softener. However, the water you use will be hard.
To resume soft water service, open bypass valve by rotating the knobs counterclockwise.
People
in Family
Iron Content (ppm)
2
4
6
8
10
12
14
16
18
20
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
2
2
2
2
2
3
1
1
1
2
2
2
3
3
3
3
4
1
1
2
2
2
3
3
4
4
4
5
1
1
2
2
3
3
4
4
4
4
6
1
2
2
3
3
4
6
6
6
6
Figure 5