24
TO CALCULATE BACK-
WASH 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
requirements 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.
BEFORE SERVICING
1.
Turn off water supply to conditioner :
A.
If the conditioner installation has a 3 valve bypass system
first open the valve in the bypass line, then close the valves at the
conditioner inlet & outlet.
B.
If the conditioner has an integral bypass valve, put it in the
bypass position.
C.
If there is only a shut-off valve near the conditioner inlet, close it.
2.
Relieve water pressure in the conditioner by stepping the control
into the backwash position momentarily. Return the control to the
In Service position.
3.
Unplug electrical cord from outlet.
4.
Disconnect drain line connection.
SERVICE THE PLATINUM VALVE
WARNING
Electrical shock Hazard!
unplug the unit before
removing the cover or
accessing any internal
control parts.
CAUTION
Disassembly while under pressure can result
in flooding. Always follow these steps prior to
servicing the valve.
BACKWASHING
INSTRUCTIONS
TO CALCULATE BACKWASH FREQUENCY
- NORMAL APPLICATIONS
Backwash frequency for households with average water
use can be determined using the following guide. 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.
PEO-
PLE
IN
FAMI-
LY
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
6
6
6
1
2
2
3
3
4
6
6
6
6
Содержание BPF89CATCB100TOC
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