Section 5. Filter Cleaning; Filter Cleaning Instructions - Jandy JS Series Installation And Operation Manual

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7. Be sure to open any filter isolation valves that
were installed in the system.
8. Ensure the backwash piping is open. Set the
backwash valve handle to the "Backwash"
position, if a multiport backwash valve is installed,
and if a slide valve is used, turn the handle to
unlock and pull fully upwards to the backwash
position.
9. Stand clear of the fi lter and start the pump. When
a steady stream of water starts to come out of
the air release valve, close the valve. There will
be a steady stream of water flowing out of the
backwash valve piping. Continue to backwash
until the backwash water is clear (3 to 5 minutes).
10. Turn the pump off.
11. If the multiport backwash valve has a "Rinse"
position do the following:
a. Set the selector handle in "Rinse" position.
b. Start the pump and run for 30 to 40 seconds.
This helps settle the sand bed and removes
fine particles in the bottom of the sand bed.
c. Stop the pump.
12. Set the backwash valve handle to normal operation
position, or to "Filter" position if a multiport
backwash valve is installed. If using a slide valve,
push the handle down to the normal filter position
and turn the handle to lock in place.
13. Make certain all inlet and return lines to the pool
are open to allow free movement of water from the
pool and returning to the pool.
14. Completely open the air release valve on the
gauge/air release assembly by turning the knob on
the back of the assembly fully counterclockwise.
Do not remove the knob.
15. Stand clear of the filter and start the pump. When
a steady stream of water starts to come out of the
air release valve, close the valve.
16. Ensure that the water is returning to the pool. The
system is now in normal filtration mode.
17. After the pressure gauge has stabilized, turn the
bezel ring so that the arrow next to the word
"CLEAN" aligns with the needle of the gauge. As
the filter cleans the water and the sand begins to
clog, the pressure will increase. When the needle
of the pressure gauge aligns with the arrow next
to the word "DIRTY" on the bezel, it is time to
clean the filter (see Cleaning Instructions). This
indicates an increased pressure of between 10 and
12 psi above original starting pressure.
JS Series Sidemount Sand Filters
NOTE Record this initial "CLEAN" pressure. This

Section 5. Filter Cleaning

5.1 Filter Cleaning Instructions

operation on a new pool, the filter should be back-
washed to clear out plaster dust and debris from the
pool construction.
pressure gauge reading shows an increase of 10 to
12 psi above the "CLEAN" filter pressure. Another
indicator of the need to backwash is when the flow back
to the pool is reduced by 30% compared to the clean
filter flow amount.
To prevent the possibility of personal injury and
equipment damage, always turn the pump off before
changing the position of a backwash valve.
1.
2.
3.
4.
5.
6.
reference will be necessary in the future, when
after backwashing, the "CLEAN" pressure does
not return within 5 psi of the "CLEAN" pressure.
This will indicate the need to chemically
clean the sand bed. See Chemical Cleaning
Procedure, Section 5.3.
For New Pool Startup - after 48 hours of
Backwashing your filter is required when the
WARNING
NEVER attempt to assemble,
dis as sem ble or adjust the filter when
there is pressurized air in the system.
Starting the pump while there is any
pressurized air in the system can cause
product failure or also cause the filter lid
to be blown off, which can cause death,
serious personal injury or property
dam age.
CAUTION
Turn the pump off.
Ensure suction piping and backwash piping is
open to ensure unobstructed flow through the filter
and through the backwash line.
Set the backwash valve handle to the "Backwash"
position if a multiport backwash valve is installed,
and if a slide valve is used, push handle down to
the backwash position and turn handle to lock in
place.
Stand clear of the filter and start the pump.
Backwash the filter for 3 to 5 minutes, or until
water appears clear.
Turn the pump off.