UTILUS FRS"FIBERGLASS D.E. FILTER

INSTALlATION, OPERATION & SERVICE MANUAL

WARNINGTHIS MANUAL CONTAINS

IMPORTANT SAFETY INFOR­MATION WHICH MUST BEFURNISHED TO THE ENDUSER. FAILURE TO READAND FOLLOW INSTRUC­TIONS COULD RESULT INSERIOUS PERSONAL IN­JURY AND/OR MAIORPROPERTY DAMAGE.

TABLE OF CONTENTSA. How Your Filler Works 2B. Inllallation 3C. InitIal Slart-Up " .. 4D. Filter DlslssemblyfAssembly 4,5E. Cleaning Frequency 6F. Fitter Backwa.h ProeedullI 6

G. Manu,l Filter Cleaning 8,7H. Chemical Cleaning 8I. Winterizing Procltdur 8J. R.~.cemenlPart•.................... 9,10K. Trouble.hooting Guide ".. 11

CORPORATE OFFICES.nlord, Ne

(I") 774_4151

........ _WUT

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NAUTILUS" FNS MANUALThill filter operates under prell9ure. When clOlled

properly and operated witho\lt air in the watersystem, this filler will operate in a safe manner.

Warning label, should be affixed to the top ofthe filter and on the clamp bands 8t all times.Keep Bafety labels in good oondition. Replacemining or damaged safety labels. (For free Iii\).els call 1·919-774-4151).

A. HOW YOUR FILTER WORKS

YOliT vemca1ll'rid diatomaceous earth (D.E.)filter;8 designed to operate for yeaTS with propermaintenance. The filter housing ia made of cor­rosion resistant materials and when installed,operated and maintained in accordance withthese instructions, your filter will provide yearsof service.

Your filter must be charged with D.E. 81 initial start·up. This D.E. will cover the vertical filter gridcloth within the filter with a thin coating. Dirtywater flows from the pool through the controlvalve on the side of the filter and into the lowerside connection of the filter (part 32). The dirtywater flows through the vertical grid elementa(part 17) where dirt is filtered out by the D.E.Coating. All grid elementa channel cleaned waterinto a manifold system (part 16) which exita atthe upper side connection (part 28) and throughthe control valve to return back to the pool. Bycontinuously diluting the dirty pool water withclean water, the entire pool becomes graduallycleaned. Your filter and pump should be sized tocirculate from 2 to 4 times the volume of water inthe entire pool through the filter every day toaccomplish the cleaning.

As dirt is collected in the coating of D.E. in thefilter, the pressure will rise and the flow of water

PAGE 2to the, pool will be reduced. See other sections inthe manual to determine when to clean the filterand how to choose the appropriate cleaningmethod. Thia filter will only remove luspendedmatter and docs not sanitize the pool. The poolmust be sanitited and PH balanced for sparklingclear water. Your filtration Iystem mUlt be con·figured and siz.ed to meet your local health coc!eI.

'Part no's in parenthesis refer to the replace­ment parts as shown in the exploded drawingat the end of the manual.

•• WARNING""'ailure to run your filter or inadequatefiltration can result in pool water claritythat could obstruct visability and allowdiving into or on top of obscured objectswhich can cause serious personal injuryor drowning.

Clear water is the result of proper filtration8S well 8S proper water chemistry. Pool chern·istry is a specializ.ed area and you should con·suIt your local pool service specialist for spe­cific help or instructions. In general properpool sanitation requires a free chlorine level of1 to 2 PPM and a PH range of 7.2 to 7,6.

FILTER OPERATIONAL DATAFllna Fltna flOW un TURNOVlI CAPACITY

MOO" """'"(GPM) 1-..;1...1__............1

NUMlll ISq. fl·1 - ..- 6 Hrs• • Hrs. 10 Hrs• 12 Hr•••,.-.r....... ... -.r.......

FNS24 24 36 48 17,280 23,040 28,800 34,560

FNS 36 3. 54 72 25,920 34,560 43,200 51,840

FNS 48 48 72 •• 34,560 46,080 57,800 69,120

FNS 60 60 90 12. 43,200 57,600 72,000 86,400

(l~l~'lj~IJJ'1'§1:II

NAUTILUS'· FNS MANUAL

B. I!'IiSTALLATID'

"WARNING"FILTERSSHQULDNEVERBETESTEDOR SUBJECTED TO AIR OR GASUNDER PRESSURE. ALL GASES ARECOMPRESSIBLE AND UNDERPRESSURE CREATE A DANGER.SEVERE BODILY INJURY OR PROP·ERTY DAMAGE COULD OCCUR IFTHE FILTER IS SUBJECTED TO AIROR GAS PRESSURE.

1. Check carton for any evldenee ofdaml!l,edueto rou,h handlin, in ahipmenL If carton orany filter component.. are damagtd. notifymiaht carrier immediately.

2. After inapection, carefully remove filter com.ponent.. (rom carton.

3. Mount filter on a permanent IIlab, p~rerablyoonCl'flte poured in III fonn or on a platformcon,trllete<! of concrete block or brick. DONOT use sand to level the filter or for pumpmountin,. 81 it will wash away.

4. Provide apace and lighting for routine main.tenance l!lcee8l1. Do not mO\lnt electrical oon·trol. over filter. In Iftpect.forthepotential(orinjury fl"l)m any pl'eQurhed .y.tem, it it agood common sen.e precaution to alway..tand dear of the ruter whenever ltartini' thepump.

5. I{ you have a Multi-port Valve, aaaemble thevalve to tank, being .ure "0" rini" on valvefittinl' are in place and are clean. Ute a lub­ricant applied li,htly, .uch u petroleum jelly,.i1icone frUte, Mytilube or .imilar producton "0" rinp and "0" ring i'1'OOves prior to&Nembly.

6. I{ you have a two JIO'ition .lide valve, alignthe valve with tank M that the handle ittoward the top of the tank, pu.h valve intoporU and tum the valve nutl.nui'ly on tankfittinll.1t i. notneceuary tocinc:h valvenutito tank fittinl beyond hand tightneet.

7. A'lemble piping and pipe fitting. to pumpand valve. All piping mu.t conform to localand .tate plumbing and sanitary codel.

PA&l3

8. Ule teflon tape or plaltojoint ltick on all maleconnectiolll of pipe and fittinll. Ute oniypipe compound. luited for plutic pipe. Sup­port pipe to prevent.trainaon filter, pump orvalve.

9. Lonl piping I'WI' and elba_ rettriet flow.For best efficiency UN the fewest pouible fitrUngl, l8TJe diamete:r pipe (at leut J.lI2",preferably 2") &: locate equipment .. close tothe pool .. pouible.

10. A cheek valve it ..-nmended between thefilter and heater to prevent hot water "'backup" which will damale the filter and valve.Another check valve it recommended betweenthe mter and the pump to prevent D.E. frommigrating back to the pool when the filter itoff.

11. The maximum operatinl preelureofth~uniti.50 pound. per square inch. Never operatethi. filter above thil pl'eQun or attach apump to thi. mter that hal more than 50 pli.hut off preSlure.

12. Never install a chlorinator upsl.«am or thefilter ·alway. down'l.«am and with a checkvalve in between the chlorinator and filter.

13. A potitive .hutoffv.lve it not recommendedat the outlet of the filterinl .y.tell'. I{ the.ystem ill ever run with .uch a valve dOted,the internal air relief .y.tem becomes inoper·ative and an uploeive .itu.tion could exist.Additionally, running the .yatem with noflow will leriou.ly dam.ge the equipment.

14. A pofIitive .hut off valve it alto not recom·mended at the wute port of the valve. U the.ystem is ever 1'1,1n with .uch a valve doaed,the filter pTelllure will 10 abnormally highand incrUlIe the ritk of v_I separation.Additionally, runninl the .yatem with noflow willterioualy damale the equipment.

15. Never .tore pool chemicalt within 10 ft.. ofyour pool filter and pump. Pool chemicala arecolTOllive and .hould alwaya be .to~ in acool, dry and well ventilated area.

NAUTILUS'· FNS MANUAL PAGE 4

NOTICE: 1/2 pound of DE Will fill a 130z. coffee

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MODel POUNDS OF D.E.

FNS 24 2.5 • 3.5

FNS36 3.5 • 5.5

FNS 48 5·7

FNS 60 ,.,

D.E. RECOMMENDATIONThe amount of D.E. should be between 1 and1·1/2 d t h 10 t t ffilte rea0'

1. On a new pool, clean the pool before fillingwith water. Excess dirt and large particlescan cause damage to pump and filter.

C. IMTIAL START·UP

.. WARNING·'Chemical (urnes and/or spill, can causesevere corrosive attack to the filter andpump .tructural metallic components.Structurally weakened filter componentscan cause filter or valve attachments toblow off and could cause severe bodilyinjury or property damage.

2. Check clamp assembly for tightness. See fil·Ler disalJ.!lembly and assembly p~ures.

•• WARNING"Improper tank assembly could cause thetank top to blow orland cause severe bodilyinjury and/or property damage.

3. Move vslve handle to filter position. Openair bleeder screw (Item I) on the filtertop. Check pump strainer pol to be sure it isfull of water. Replace pump lid.

.. WARNING"Air enteri ng filter 8 nd/or the filter u nit notclosed correctly can cause the tank top toblow off and could cause severe bodilyinjury and/or property damage.

4. Open allsudion and return line valves. Standclear of filter during the following operations.

5. Start pump. The tank will fill with water andexpel! air from the air bleeder. Close the airbleeder screw only after a steady stream ofwater cornell out.

7. On a new pool installation, it will requireapproximately one week to obtain and main·tain the water clarity of which your filter iscapable. It is recommended to disassembleand clean the filter after initial pool clean up(approximately 48 hours ofoperation). Followthe instructions given in this manual for dis·assembly. cleaning and reassembly.

8. Be sure to note the operating pressure of thefilter when it is clean and properly chargedwith D.E. As the filter remOVell dirt from thepool, the pressure will gradually increase. Asa guide, when the pressure has increased 7 to10 psi from the initial reading, it is time tobackwash the filter.

Alternately another method for determiningwhen to backwash the filter is by judging a dropin the amount of water flowing from the filter byobserving the flow from the inlet fittings in thewall of the pool. As a general rule, backwashingis needed when the flow rate becomes about 213the rate of a clean filter.

D. FILTER DISASSEMBLY/ ASSEMBLY

6. Remove the skimmer lid, put the recommend·ed amount of diatomaceous earth (D.E.) intothe skimmer. The D.E. will be drawn into thefilter and deposited evenly upon the grid ele­menl.ll. Now the filter is providing the poolwith bright, clean water.

NOTICE: Do not operate filter without D.E.charge for more than two minutes. Do not usemore than the recommended amount of D.E. inyour filter.

Before Disassembling Filter.Backwash filter according to instructions under"Filter Backwash Procedure" but stop after in·struction if7. Do not precoat with new D.E.

DISASSEMBLY:I. Be sure pump is turned off and all pressure

haa been released from system.

NAUTILUS'· FNS MANUAL PA&l5

ASSEMBLY;

5. Being careful not to damage tank aeal, liftupper tank shell off of lower tank sl1ell.

l. Thoroughly dean airrelieffllter scr~non topof manifold EVERY time filter is opened. Besure to remove all debris from screen.

3. Clean tanlt seal :area of tank !.hell (boIh halves) and_...4. Apply a small amount of sllicoM based lubricant to

the laIIk seal.Note; PAC·FAB rt:commenw silicone lubricanlsbocausc they an: insoluable in walcr and thetefOft! pr0­

vide luoo.:-tion for utendcd periods. an: nonllUic andare compalible with nearly all plaslics Illd da.stomcrmaterials (excepls;liCQIIC rubber). ElIcc:llentlubrican15inchlde: • 00101 Coming 'Ill. 14. or 17 (Can 00101Coming at 1-800-243-2481 for product a.ailability,pricin. or leCtmical information) • Parker SU!M'r.Q·Lube (Do not use PaO;er O-Lube). This prodUCt iswidely available at most dlwibutors of rubber prod.~.

S. Carefully install tank seal and upper laIIk ihcll.CAUTION; Be sure up!M'r tank shell contacts tank sealliUrfllCf fl'enly and seal II'fll is dean and fret from dirt,...6. [Mtail clamp springs. lOIuhcrs and nut!. TIghten nUl!

evenly and allernalely until spring ooils louch each0Ibcr. Tap clamp aroorod laIIk with rubber hamrrtCf tel

lSSi$! SClting of clamp. If filter is an earlier modellOIithoul spring clamp tighten each nutlO 120 in·lbf.

7. Use only those componenl! JUpplied lOIilh filler 0<

PAC.FAB n:placement pam lOI1>1:n iJ.caling 1OI;lh thebands and $piing teMioning devices.

"WARNING"UK of non original equipment parIS on band dampsIOIillt spring Ie.woning devices m.ay cause lbfSf leMilln_Ing duices 10 mal-fundion, resulting In improperclamp Installalion. Improper damp Installalion couldcause lite llller lOp 10 blow 01T and callSoC SfVCn' !M'non­allnJury andIor property damage.CAUTION: Do nOI over light~n lhe clamp band.Tightening the clamp band beyood recommended proce.dures may damage the clamp barod and cause une~pected

failun:. sudden n:lease of prcssun: .rod injW')' or damage.o.~r lightening may also deform lanl; seal, causing leakageat band clamp. Corroded componcnl! ClJlnot be n:pairedand must be n:placul. If you are e~peric:lICin. corrosion.coosoll your pool ~icc company or (kal.....

"WARNING--Alway••isually In~pfCt filler compon~nl'duringnonnal servicing 10 insure structural safely. Replaceany ikm which is col'Ttllied, bent or otherwi$c visuallydefectlve. Defecllve nller components Can allow lheroller lap or attachments to blow 01T and could causeseVen' bodily ll'ljury or property damage.

2. Inspect tank seal (Item 22) for cuts, nicks, etc.Ifdamaged, replace with a new one.......

'IGIJI' ....

4. Tank halves may have a tendency to sticktogether. In order to separate \.ank halves, itmay be necl1uary to strike the tank top usingthe palm ofyour hand with aglancingupwardmovement (Figure A). Proc~d graduallyaround the tank using this motion until thetop lllOllens.

3. Loosen damp nu\.8 altemately until one iaremoved. Remove spring and washers notingpart orientation. Lift clamp assembly off offilter. NOTE· Filters manufactured in 1992may not <:Qnta;n .pring and washers onclamp.

CA UTION: Clamp hardware and filter sur­face could have .harp edge. which cancause bodily Injury if improperly handled.Please ulle caution when performing thefollow!nl procedures.

··WARNING ..Rele.sin, damp with prel8ure on IYltemwill caule tank lid to blow off, caulingsevere injury or major property damage!NEVER adjust, ti,hten or loosen "V" bandclamp when tank III under preuure!

2. Remove filter drain plug and drain all waterfrom tank.

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NAUTILUS'· FNS MANUALE. Cl[..\~I~G FREQl [~C\:

The filter on a new pool,hould be backw..hed,diu ll5embled and cleaned after approIimately48 houri of operation to clean O\It platter dUllandlor conltn>etion debn..

Once a new pool haa been established, the dinoollected will gradually increase the filter pno:s­'UN!. When the filt.erpre"urfl IntTealle. 710 10 Pi;over the initial prellaure or when the now halbeen reduced by about 1/3 from when the filterwal clean, it i. time to backwalh the filter. Dil·(enol art.. and water conditiolUl will have dif·ferent nonnal cleaning intvvala.

I{at any time the starlio, preuure after back·washing the filter india," 2 to 6 psi higher thannormal .UU'tinc pre&llUlt, it i. time to perfonn amanual filter cleaning or " chemical cleaningprocedure in the worst cases.

1l i. II good idea to dia'8ll('mble the filter andperform a chemical cleaning procedure twice ayear to remove accumulated body oila, ele.

In areas that have freezing winter lempera·turn protect equipment by backwalihing andeither manually cleaning or chemically cleaninghefon winteT ltoragle. Beliureall waleri.drainedfrom the filtv uaing the drain plug. The airbleeder must be opened a. well u an othervalves.

F. FILTER BACKWASH PROCEDlRE

CAUTION: To prevent equipment dllmageand possible injury. turn pump OFF beforechanging valve position.

NOTICE, When backwashing with a sepa­ration tank, -.ee Separation Tank Owner'.manual for inlltruction•.

I. SlOp pump. En.ure that the backwash line i.open and any valving ill adjusl.ed to allow thefree flow of water.

2. Chanlle valve po!Iitionl.a·If u.ing Multi·port Valve, tet to backwashpolIition.b.1f u.in, Two-Position Slide Valve, r~handle to fully es:lended polIition.

3. Stand de... of filter.

'A&l64. Start pump, thil will circulate water bad;·

wardt thfO\lgh the filter to flush D.E. cakeand contaminantl into the teparation tank orto waste.

5. If .y.tem ha. a Bight gl.... backwath untilwater in gla... nlDli dear.

6. If lIystem dOH not have a .illht glalll:a·Backwash one minute.b-Stop pump and change valve poliition.

1) If USinll Multipart V.lve, tet to rinsepoaition.

2) If u.ing Tw<>.Position IUde valve, pushhandle down to filter poaition.

CAUTION: Stop pump before changingvalve settings!

c.Stand clear of filter.d·Restart pump, run for one minute.l!'"Repeat stepa a,b.e and d three times.

Cyelinll is effective when cake and contaminanuare dlNieultlO bruk and f1ulh out of the filter.

NOTICE; Do not vacuum pool wbile back­WIShing filter.

7. Stop pump.

8. Open air bleeder screw and release all pre&'lIure from tank and system.

9. Follow "Initial Slart·Up·' proeedl,lre IOrelitartsystem.

10. Compare preuure nadine on gSllge withreading recorded afiB initial Iltaf't.-lIp. Thetwo readinca Ihould be very clO6t!; if not, do"Manual Filter Cleanine Plocedure~.

G. MAJ'liUAL FILTER CLEA!'III!'IiG

NOTICE: At least once a year, diaullembleand clean niter regardle.. of operatineprelillure readinga. Thi. can be done conve­niently whi.le winterizing pool in cold cli­mate•. Use this metbod regularly if nomeaD. ofbackw..bing i, available.

NAUTILUS'· FNS MANUALBEFORE DISASSEMBLING FILTER:

1. Backwash filter .s recommended but do notprecast with new D.E.

2. STOP PUMP.

3. OPEN air bleeder screw.

4. WAIT until all preSllure i, released from filtertank and lyaUrn before lOO3ening clamp.

"WARNING"Releasing clamp with pre8Sure on systemwill blow lid of£ the tank, cau8ing severeinjury or major property damage! .

5. Dia8.6llemble filter (See Page 4)

'IGU.II.

~~~~. ,

"

•• WARNING"To avoid severe injury or major propertydamage, exactly follow instructions under"Disassembly" (Page 4)!

6. Graspelementasaembly alt.op manifold usinghand holds and lift to remove it (Figure B).

7. Hose down element assembly and clean withbottle brush (Figure C). Use detergent 801u­tion or filter cleanser available from a poolservice store.

FIGUREC.

PAGl7NOTlCE:Toavoiddamagingf.abric,donotallowfilter element to f'Ub on concrete or anyabrasive sudace during cleaning.

NOTICE: Do Dot expose element cloth todire<:t sun for long periods. Dire<:t sun willcause the cloth to deteriorate.

8. Inspect grid clotb for tears. calcification,plugged areas. etC. If necessary, soak element infilter cleanser to remove buildup of oils, etc. Itb recommended tbat an approved cleaner beused. Please contact your local pool cbemicalsupplier or retail store for the proper clealler.

Mi" a solution following the manufacturer'sinstructions on the label. Placetheentire gridassembly in a plastic container and add thesolution so the entire grid 811l1embly is aub·merged. Allow to stand overnigbt (12 houl"8).The following day wash with a hoae andremove all of the solution from the grida ao itdOl'll not return to the pool. If calcified, per­form the chemical cleansing procedure des­cribed under "Chemical CleaningProcedures".

9. Thoroughly clean air relief filter screen.

10. With filter drain open, hosedown the internalportion offilter and thoroughly clean sealingarea of tank halves.

11. Replace the grid·asaembly by setting themanifold opening directly over the connectorpipe. Push down on the grid assembly andcheck to see that it is seated properly.

12. Thoroughly clean drain plug seal and sealingarea and replace and tighten plug.

•• WARNING··To avoid severe injury or major propertydamage, exactly follow instructions under"Assembly" (Page 5)!

13. If unit is returning to semce, see "InitialStartup" (Page 4).

14. Ifcleaning is part of seasonal shutdo....n, see"Winterizing" (Page 8).

NAUTILUS~ FNS MANUAL PAGE.II. CIIE:\IICALCI_EA~I~G PROCEDl RE

1. STOP PUMP.

2. OPEN air bleeder screw.

3. WAIT until all pressure is released from filtertank and system before loosening clamp.

"WARNING"Releasing clamp with presaure on systemwill blow lid off of tank, causing severe I

injury or major property damage.

NOTICE, Do not expose element cloth todirectsunlight for longperiods. Direct sun·light will cause the cloth to deteriorate.

NOTICE: To avoid damaging fabric, do notallow filter element to rub on concrete orany abrasive surface during cleaning.

4. DisaS8emble Filter.

"WARNING"To avoid severe injury or major propertydamage, exactly follow instructions under"Disassembly" (Page 4)1

5. Disassemble and inspect element grid S8Bem·blies for tears and worn areas. Replace asneeded.

6. Rinse each grid thoroughly with water.

7. Wash each grid with a mild soap solution. Ifnecessary, soak element grids in filter cleanserto remove buildup of oils, el.c.

8. Rinse thoroughly to remove all soap film.

9. To remove mineral buildup from filter cloth,soak each element grid two to four hours in asolution of one part muriatic acid to ten partawater. Some foaming may occur.

"WARNING"

'Follow manufacturer', instruction"Danger of burns or explosion. Do not addwater to acid, alway, add acid to water. Donot allow acid to touch your tkin. Donot uteacid without eye protection and rubber,love,.

10. Rinse each element grid thoroughly withwater.

1L Reassemble element grids.

12. Inspect inside of filter tank and remove alldebris remaining after backwashing.

13. Thoroughly clean air relief screen on top ofmanifold. Be sure to remove all debris fromscreen.

14. Follow filter assembly procedure (Page 4).

"WARNING"To avoid ,evere injury or major propertydamage, exactly follow inttructions under"Assembly" (Page 5)!

15. If unit is returning to service, s~ "InitialStartup" (page 4).

16. If cleaning it part of seasonal shutdown, see"Winterizing" procedures below.

I. WI1''TERIZING PROCEDL:RE

1. Backwash and manually clean the filter fol·lowing the recommended procedures.

2. We recommend removing the internal gridassembly and store in a dry area

3. Reassemble the filter following the recom·mended procedures.

4. Open air bleeder valve. Open all systemvalves. Position multiport valve between portpositions (winterize position) to allow pas·sage to all porta and relieve prellsure on thesealing gasket.

5. Remove drain plugs from filter, separationtanka and pumps.

6. Drain system piping.

7. We recommend covering the equipment withII tarpaulin or plastic sheet to inhibit deterio­ration from the weather.

NAUTILUS" FNS MANUAL PAGE.J. Rt:PL\CDIE:'IiT P,\RTS

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NAUTILUS" FNS MANUALK. TRot 8l.f:SfJOOTI:'liG GLIDE

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