Pentair FNS Plus FNSP 24 Owner's Manual page 4

C. SYSTEM RESTART INSTRUCTIONS.
THIS FILTER OPERATES UNDER HIGH PRESSURE. WHEN ANY PART OF THE CIRCULATING SYSTEM, e.g.,
CLAMP, PUMP, FILTER, VALVE(S), ETC. IS SERVICED, AIR CAN ENTER THE SYSTEM AND BECOME
PRESSURIZED. PRESSURIZED AIR CAN CAUSE THE LID TO BE BLOWN OFF WHICH CAN RESULT IN SEVERE
INJURY, DEATH, OR PROPERTY DAMAGE. TO AVOID THIS POTENTIAL HAZARD, FOLLOW THESE
INSTRUCTIONS.
1. Open the High Flow™ manual air relief valve until it snaps into the full open position (this only requires a quarter
turn counter clockwise). Opening this valve rapidly releases air trapped in the filter.
2. Stand clear of the filter tank, then start the pump.
3. Close the High Flow™ manual air relief valve after a steady stream of water appears.
4. The system is not working properly if:
a. A solid stream of water does not appear within 30 seconds after the pump's inlet basket fills with water.
b. The pressure gauge indicates pressure before water out-flow appears.
If either condition exists, shut off the pump immediately, open valves in the water return line to relieve pressure,
and clean the air relief valve; see Section II, FILTER OPERATION. If the problem persists, call Customer Service at
(800) 831-7133.
D. COATING THE FILTER ELEMENTS WITH DIATOMACEOUS EARTH.
The following information should be read carefully since it outlines the proper manner of care and operation for your filter system. You can
expect maximum efficiency and life from your filtration system by following these instructions and taking the necessary preventative care.
1. Push-Pull Valve.
a. Push handle on valve down with slight twisting motion as far as it will go. Lock upper pin in cap. Open High Flow™
manual air relief valve on the filter. Proceed with steps 2.b to 2.g, below.
2. Multiport Rotary Valve.
a. Position valve to FILTER OR VACUUM TO POOL setting. This is your normal flow from the pump through the filter to
the pool. Open the High Flow™ manual air relief valve on the filter. Proceed with steps 2.b to 2.g, below.
b. Prepare recommended amount of diatomaceous earth by mixing it with water in a bucket until it is the consistency of milk;
see Section E, PREPARING DIATOMITE.
c. On initial start-up the pump must be primed by filling the hair and lint strainer pot with water. You may have to do this
several times.
d. Follow the steps outlined in Section C, SYSTEM RESTART INSTRUCTIONS for system start-up.
e. Introduce the slurry of diatomite from the bucket directly into the top of the skimmer. With the pump running and the
pool skimmer valve open, pour the mixture directly into the skimmer. The slurry will be drawn into the filter.
f. Your filter is now operational. Note the original starting pressure on the gauge and record it below.
g. Clean your filter when pressure reads between 10 to 12 psi higher than the original starting pressure. Your filter pressure
reading will increase as it removes dirt from your pool. However, this build-up of pressure will vary due to different
bathing loads, temperature, weather conditions, etc.
h. MY ORIGINAL STARTING PRESSURE IS ___________ psi (pounds per square inch). I SHOULD BACKWASH AT
__________ psi.
If the starting pressure after backwashing the filter or cleaning the elements indicates 4 to 5 psi higher than the normal
starting pressure, the filter elements must be cleaned. Refer to step 1, Section H, CLEANING FILTER ELEMENTS for
instructions.
P/N 190033
WARNING
CAUTION
NOTE
4 Rev. G 6-27-03