sec 4 tf - tower-flo

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®

for

Series

TFWater Filter Systems

TOWER-FLO® DivisionUnited Industries, Inc.P. O. Box 58Sterling, KS 67579800-835-3272 • 316-278-3160Fax 800-500-3115 • 316-278-3115www.towerflo.com

Complete information for

Engineering, Installation, Operation & Maintenance

of Tower-Flo® Series TF Water Filter Systems

TECHNICAL MANUAL

MemberCooling Tower Institute

NSF Listed

Data presented here is the bestavailable at the time of publica-tion. United Industries and/or itsrepresentatives assume no lia-bility for its use.

Series

TF Index®

Form TF-INDEX:9/99

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United Industries, Inc.P.O. Box 58Sterling, KS 67579800-835-3272 • 316-278-3160Fax 800-500-3115 • 316-278-3115www.towerflo.com

Form ID Current Description PageTF-INDEX ................10/98................Index, Series TF ...............................................................................................2..........................................................Warranty ...........................................................................................................3..........................................................Warranty Registration .......................................................................................4TF-DESC .................10/98................System Description ...........................................................................................5TF-SPEC ...................5/99................Specifications.................................................................................................6-7TF-PSPC ...................5/99................Project Specifications ....................................................................................8-9TF-COMP ..................4/98................Components....................................................................................................10TF-DIM ......................9/95................Dimensions .....................................................................................................11TF-CURVE ................9/95................Pump Curves ..................................................................................................12TF-PTS-18.................3/99................Parts, 18" Vessels...........................................................................................13TF-PTS-24.................3/99................Parts, 24" Vessels...........................................................................................14TF-PTS-30.................3/99................Parts, 30" Vessels...........................................................................................15TF-PTS-AUTO...........3/97................Parts, Multiport Autotrol Control Valve ...........................................................16TF-PTS-SPM .............9/99................Parts, Strainer, Pump & Motor Assembly .......................................................17TF-ELEC-120-1 .........4/98................Electrical Schematic, 120V Single Phase.......................................................18TF-ELEC-208-1 .........4/98................Electrical Schematic, 208/230V Single Phase................................................19TF-ELEC-230-3 .........4/98................Electrical Schematic, 208/230V Three Phase ................................................20TF-ELEC-460-3 .........4/98................Electrical Schematic, 460V Three Phase .......................................................21TF-ELEC-575-3 .........4/98................Electrical Schematic, 575V Three Phase .......................................................22TF-BWR.....................4/98................Optional Backwash Regenerator ....................................................................23TF-BWR-PTS ............4/98................Backwash Regenerator Parts .........................................................................24TF-SPARE.................5/99................Recommended Spare Parts List.....................................................................25INISS .........................1/99................Installation Issues ...........................................................................................26SWEEP......................4/98................Basin Sweeper Piping.....................................................................................27TF-INSTAL1 ..............9/95................Installation Instructions ...................................................................................28TF-INSTAL2 ..............9/95................Installation Instructions ...................................................................................29TF-INSTAL3 ..............9/95................Installation Instructions ...................................................................................30TF-INSTAL4 ..............9/95................Start Up Instructions .......................................................................................31TF-CGP .....................9/95................Cam Motor, Gear, and Pawl Detail.................................................................32TF-OPER1.................9/95................Operating Instructions.....................................................................................33TF-MNTN1.................4/98................Maintenance Instructions ................................................................................34TF-WINT1..................9/95................Winterization Instructions................................................................................35TF-TS1 ....................11/94................Trouble Shooting Guide..................................................................................36TF-TS2 ....................11/94................Trouble Shooting Guide..................................................................................37

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Warrant only to _____________________________________________________________,

the original retail purchaser, that the products which are manufactured by United Industries, Inc. are free from defects in materialand/or workmanship for a period of twelve months from the date of documented installation or, in absence of documented instal-lation date, 12 months from the date of factory shipment. The warranty registration card in this manual MUST be completed andreturned to United Industries, Inc. in order to establish the date of installation and extend the warranty period. If, within the periodprovided by this warranty, any such product shall prove defective, it shall be either repaired or replaced.

For repair/replacement, the original retail purchaser shall first contact the installing dealer, as soon as possible after discovery ofthe defect, but in all events prior to the expiration date of the warranty. Upon notification by the dealer, United Industries, Inc., 202East Cleveland, Sterling, Kansas 67579 will advise the purchaser of the address to which the defective item may be shipped. Theserial number and the date of purchase of the item must be included. Regular UPS cost for shipping replacement part(s) to thecustomer will be borne by United Industries, Inc.; shipping other than regular service will be at the customer’s expense. Customeris responsible for cost of shipping defective part(s) back to United Industries.

If an installing dealer was not involved, then the customer should contact United Industries, Inc.

EXCLUSIONS

1. This warranty shall not apply to any failures resulting from: negligence, abuse, misuse, misapplication, improper installation,alteration or modification, chemical corrosion, or improper maintenance.

2. Any items manufactured by other companies and used by United Industries in its products may carry warranties by the origi-nal manufacturers.

3. United Industries is not liable for incidental or consequential damages, loss of time, inconvenience, incidental expenses, laboror material charges in connection with removal or replacement of the equipment.

United Industries is not responsible for any implied warranties or representations by others, and the foregoing warranty is exclu-sive and in lieu of all warranties provided herein. Some states do not allow the exclusion or limitation of incidental or consequen-tial damages, so the above limitation or exclusion may not apply to you. This warranty gives you specific legal rights, and you mayalso have other rights which vary from state to state.

IMPORTANT

Read and fully understand the WARNING labels on the equipment. DO NOT OPERATE this unit if any unsafe conditions exist.

UNITED INDUSTRIES, INC.TOWER-FLO® LIMITED WARRANTY

WARNING

THIS FILTER SYSTEM OPERATES UNDER PRESSURE. DO NOT OPEN WHILE PUMP IS RUNNING AND/ORUNTIL ALL PRESSURE IS RELEASED THROUGH AIR RELIEF VALVE. SECURELY TIGHTEN VESSEL ANDSTRAINER CLAMP ASSEMBLIES ACCORDING TO MANUFACTURER’S INSTRUCTIONS. RAISE PRESSURESLOWLY. DO NOT EXCEED THE MAXIMUM WORKING PRESSURE OF THE VESSEL.

DANGER! EXTREME CARE MUST BE TAKEN DURING PRESSURE TESTS. FAILURE TO FOLLOW THESEINSTRUCTIONS EXPLICITLY CAN RESULT IN PERSONAL INJURY.

®

Filter Model Number _________________________________ Filter Serial Number _________________________________

Total Filter Surface Area ______________________________ Filtration Rate: Maximum 20 GPM/ft2 of Filter Surface Area

Required clearance for service and maintenance: Vertical height ________________ Horizontal width ________________

Filter Flow Rate GPM: Filtration ______________ Backwash _______________ Maximum Working Pressure ___________

Continuous sidestream filtration for removal of suspended solids is one, very important portion of a total water quality manage-ment program, which should also include the services of competent water treatment professionals for proper control of waterhardness, pH, and biological contaminants.

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WARRANTYREGISTRATION

®

Congratulations on your selection of a TOWER-FLO® Water Filter System by United Industries, Inc.!

Your TOWER-FLO® Filter is designed and manufactured for years of virtually maintenance-free service. As withany mechanical equipment, however, components can and do fail. If you ever have a problem, Tower-Flo® is com-mitted to supporting you and helping you get your filter back in operation as soon as possible, whether it remainsunder warranty or not.

Your TOWER-FLO® Filter is covered by a limited warranty as stated on the previous page. This warranty is for 12months from the date of documented installation or, in the absence of documented installation date, 12 months fromthe date of factory shipment. In order to receive the maximum warranty benefit, you must complete and returnthe Warranty Registration Card below within 10 days of installation to register your warranty and ensureyour warranty rights. Failure to complete and return this Warranty Registration Card will result in your warrantybeing limited to 12 months from the date of factory shipment.

EXTEND YOUR WARRANTY!

COMPLETE AND RETURN THIS WARRANTY REGISTRATION CARD WITHIN 10 DAYS OFINSTALLING YOUR FILTER TO EXTEND YOUR WARRANTY PERIOD!

Manufacturer’s Warranty Registration®

Water Filter Systems

Filter Serial Number: __________________________________________________________________

Purchased by: Company: ______________________________________________________________

Address: ______________________________________________________________

City: _______________________________ State: ____ Zip: _____________

Contact Person: __________________________ Phone: _______________________

Date of Installation: ___________________________________________________________________

Complete the card below. Cut along dotted line. Return to:

Warranty RegistrationTower-Flo® Filter DivisionUnited Industries, Inc.P. O. Box 58Sterling, KS 67579

For Your Records

Date of Installation ____________________ Date Warranty Registration Card Mailed _______________


NSF Listed


Series

TF System Description

®

Form TF-DESC:10/98

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The information below provides a general description of the main components of Series TF filter systems. Detailedspecifications for these components are found in the Specifications document and details of standard, optional, andadditional components are found in the Project Specifications document, both of which are on the following pages.

MAIN COMPONENT DESCRIPTION

A. HIGH RATE SAND FILTER VESSEL

This permanent media, high-rate sand filter is a vertical pressure vessel with a special influent baffle in the top of thetank, a bed of filter sand and a mechanical underdrain system which collects the filtered water and directs it to thereturn piping system. The filter operates under pressure. When closed properly and operated without air in the watersystem, this filter will operate safely. The system is equipped with a manual high-flow air release valve, an automaticpressure relief valve set at 35 psi, and 0-60 psi influent and effluent pressure gauges mounted in a common panel.

B. CONTROL VALVE ASSEMBLY

Automatic backwash controls are integral to the multiport valve assembly which operates on the basis of pressuredifferential between the inlet and outlet of the filter. The differential pressure setting, which initiates backwash, canbe adjusted over a wide range and is factory preset at 15 psi. Direct acting valve discs control the flow. The pumpautomatically stops whenever the valve shifts from one cycle to another which prevents water hammer and pipe flex-ing. The valve is provided with a manual backwash initiation mechanism. The valve is U.L. approved and resists cor-rosion. Water will contact only high-strength fiberglass thermoplastic materials and stainless steel.

C. CONTROL PANEL

Single phase Series TF filters have no control panel because the control of the automatic backwash operation is inte-gral to the control valve. And because there is no enclosure or mounting bracket, there also no influent and effluentpressure gauge panel. Three phase Series TF filters do have a NEMA 3R enclosure which houses the tranformer toconvert supply to 120 VAC control power and the motor starter with a thermal protection device.

D. PUMP

The pump has a cast brass impeller, motor bracket, and volute with stainless steel fasteners to resist corrosion. Thedrip-proof, cool running, mechanical seal virtually eliminates burnout and provides easy access for replacement. Thepump is self-priming.

E. MOTOR

The totally enclosed motor with its external fan-cooled construction allows for operation in noncombustible, dusty, dirtyatmospheres. It is double shielded with prelubricated ball bearings on both ends, has a NEMA 56C frame, a high tensilesteel shaft, enclosed in a heavy gauge rolled steel case. Single-phase motors are rated at a service factor of 1.0 whilethree-phase motors are rated at a service factor of 1.15 at 40˚ C over ambient. Motors are UL approved and CSA stamped.

F. STRAINER

The pump suction strainer assembly is fabricated of fiberglass reinforced noryl with a total capacity of 440 cubic inch-es and is rated for a maximum operating pressure of 50 psi. It has a clear lexan lid for viewing the integral cycolacstrainer basket. The lid is held in place by a stainless steel band clamp and includes a ring gasket for positive seal.

G. MEDIA

Filter media is shipped with the unit for field installation. The filter media is quartzite or silica with a relative size of.45 to .55 mm. Clean filter media will remove particles 20 microns in size and larger. Accumulated material on thetop of the media bed, called a filter cake, contributes to finer particle removal as the filter becomes “dirtier”. Removalof over 99% of 10 micron particles and 90% of 5 micron particles can be expected over the course of a filter cycle.

TOWER-FLO® Series TF filters are available in three basic models, differentiated by filter vessel size in diameterinches: the TF-18, TF-24, and TF-30. All TOWER-FLO® Series TF self-contained filter plants shall consist of the fol-lowing major components: base, pump, motor, strainer, facepiping, valve, controls, and filter vessel. The systemshall be designed for a maximum filtration rate of 20 GPM per square foot of filter surface area and be shipped as acomplete factory assembled and tested unit. Filter media shall be shipped with the unit for field installation.

BASE The base of TOWER-FLO® Series TF filter plants shall be high density black polyethylene(1)(2). Base dimen-sions are listed in the Specification Table.

PUMP TOWER-FLO® Series TF pumps shall be self-priming and consist of close grain cast and machined brassvolute(2), impeller, and pump-to-motor coupling. The pump shall be close coupled to a TEFC motor. GPM and TDHdata are listed in the Specification Table.

MOTOR TOWER-FLO® Series TF motors shall be double shielded and have prelubricated ball bearings on bothends. Motors (frame size NEMA 56C) are 50/60 Hz, TEFC, enclosed in a heavy gauge rolled steel case. Single-phase motors shall be rated at a service factor of 1.0. Three-phase motors shall be rated at a service factor of 1.15at 40˚ C over ambient. Motor options are listed in the Specification Table.

STRAINER The TOWER-FLO® Series TF pump suction strainer assembly shall be fabricated of reinforced fiber-glass with a total capacity of 440 cubic inches and incorporate a clear lexan lid for viewing the integral cycolac strain-er basket. The lid shall be held in place by a stainless steel band clamp and includes a ring gasket for positive seal.The strainer has a 2" female threaded suction port.

FACEPIPING Facepiping on TOWER-FLO® Series TF shall be Schedule 80 PVC(3)(4) and include all fittings for acomplete assembly, a backwash sight glass, and two 2-1/2" face, 0-60 psi, liquid filled, influent and effluent pressuregauges mounted in a common panel.

VALVE The TOWER-FLO® Series TF automatic backwash multiport control valve shall be molded of high impactfiberglass reinforced plastic and include 1-1/2" female threaded ports with brass retainers, differential pressure sens-ing diaphragm, cam shaft, stainless steel and butyl rubber internals, and manual override; power requirements are110/220 VAC, single-phase, 50/60 Hz.

CONTROLS TOWER-FLO® Series TF single phase units shall have controls integral to the valve. Three phaseunits shall be supplied with a UL® Listed control panel which shall include: NEMA 3R enclosure, motor starter withthermal overload and short circuit protection, and a transformer to convert supply to 120 VAC control power.(5)(6)(7)

FILTER VESSEL The TOWER-FLO® Series TF filter vessel shall be constructed of 18 gauge 304 stainless steeland designed for a working pressure of 50 psi. The working internal components shall be fabricated of molded cyco-lac and include an upper distribution system and lower collection system, hydraulically balanced for even distribu-tion of water in filter and backwash cycles. The filter vessel shall be fitted with tank drain, manual air release valve,and an automatic pressure relief valve factory preset at 35 psi.

FILTER MEDIA Filter media shall be quartzite or silica in nature, hard, not smooth, and have a uniformity coef-ficient of 1.7 with a relative size of .45 to .55 mm. Media shall contain no more than 5% flat particles, or more than1% clay, loam dust, or other foreign material. Filter media shall be shipped with the unit for field installation. Mediasurface area and volume are listed in the table on Page 2. Media weighs 100 lbs per cubic foot.

TESTING The entire system is factory tested to 150% of designed working pressure prior to shipment.

®

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Series

TF Specifications


NSF Listed


®

Form TF-SPEC:5/99

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Series Page 2

TF Specifications

NOTE:Backwash flow rate, irrespective of water source, must be no less than 75% and no greater than 100% ofthe vessel's designed maximum gpm. Backwash duration is 1.7 minutes and is not adjustable.

OPTIONS 1) Structural steel base, primed and painted, available.2) Type 304 stainless steel base available.3) Schedule 80 CPVC facepipng available when system water temperatures require.4) Type 304 stainless steel available when system water chemistry requires.5) Backwash counter available.6) Integral backwash effluent regenerator available for zero discharge.7) Through-the-door power disconnect available for 3 phase control panel.

Series TF Specification TableModel Base HP Max TDH Full Load Amp Draw Media Operating

Number Dimensions GPM Ft. Single Phase Three Phase Area Vol Weight115V 208V 230V 208V 230V 460V SqFt CuFt* in Lbs

TF-18 24" X 40" 3/4 35 65 10.0 5.5 5.0 2.4 2.8 1.4 1.8 1.5 465TF-24 24" X 40" 1 65 50 12.0 6.6 6.0 3.2 3.6 1.8 3.14 2.5 627TF-30 40" X 48" 2 100 45 20.0 11.1 10.0 5.8 5.6 2.8 5.0 4.0 977

*1 Cubic foot of media = 100 lbs.

®

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Series

TF Project Specifications

TOWER-FLO® Series TF self-contained filter plants shall consist of the following major components: base, pump,motor, strainer, facepiping, valve, controls, and filter vessel. The system shall be shipped as a complete factoryassembled and tested unit. Filter media shall be shipped with the unit for field installation.

Project: ______________________________________________________ Date: ______________________

The TOWER-FLO® Series TF Model being specified for this project is a TF-____ with a maximum filter rate of ____ GPM. This unit shall be equipped with the following components:

COMPONENT SPECIFICATION

BASE ___ Standard: High density black polyethylene.___ Option: Structural steel, primed and painted.___ Option: Type 304 stainless steel.

PUMP ___ Standard: Self-priming; close grain cast and machined brass volute, impeller, and pump-to-motor coupling; close coupled to a TEFC motor; and capable of ___ GPM at ___ feet TDH.

MOTOR ___ Standard: TEFC, heavy gauge rolled steel case; NEMA 56C frame; single-phase 1.0 servicefactor or three phase 1.15 service factor at 40°C over ambient; ___ HP; and at the follow-ing VAC and phase:single phase ___ 120V, ___ 230V,three phase ___ 208V, ___ 230V, ___ 460V, ___ 575V.

___ Special:

STRAINER ___ Standard: Basket type, FRP body, ABS basket, clear lexan cover, held in place by stainlesssteel band clamp.

FACEPIPING ___ Standard: Schedule 80 PVC; backwash sight glass; influent / effluent pressure gauges, 0-60psi, liquid-filled.

___ Option: Schedule 80 CPVC for system water temperatures of 120° to 180° F.___ Option: Type 304 Stainless Steel.

CONTINUED ON NEXT PAGE

100 GPM MAX FLOW RATE 50 PSI WORKING PRESSURE

Model Base HP Max TDH Full Load Amp Draw Media OperatingNumber Dimensions GPM Ft. Single Phase Three Phase Area Vol Weight

115V 208V 230V 208V 230V 460V SqFt CuFt* in Lbs

TF-18 24" X 40" 3/4 35 65 10.0 5.5 5.0 2.4 2.8 1.4 1.8 1.5 465TF-24 24" X 40" 1 65 50 12.0 6.6 6.0 3.2 3.6 1.8 3.14 2.5 627TF-30 40" X 48" 2 100 45 20.0 11.1 10.0 5.8 5.6 2.8 5.0 4.0 977

*1 Cubic foot of media = 100 lbs.


NSF Listed


®

Form TF-PSPEC:5/99

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Series Page 2

TF Project Specifications

COMPONENT SPECIFICATION

VALVE ___ Standard: Automatic backwash operation; molded high impact FRP; 1-1/2" ports with brassretainers; differential pressure sensing diaphragm; stainless steel internals with butyl rub-ber seats; manual override; power requirements:110/220 VAC single phase, 50/60 cycle.

CONTROLS ___ Standard, three phase: UL® Listed control panel with NEMA 3R enclosure; motor starterwith thermal overload and short circuit protection; transformer to convert supply to 120VAC control power.

___ Standard, single phase: backwash controls integral to valve; power disconnect (switch) notincluded.

___ Option, three phase: Through-the-door power disconnect.___ Option, single phase: Power disconnect (switch).___ Option: Backwash counter___ Addition: Integral backwash effluent regenerator for zero discharge.___ Option: Manual backwash; ___ single-phase; ___ three-phase.

VESSEL ___ Standard: 18 gauge type 304 stainless steel; cycolac and styrene internals; 50 psi workingpressure; fitted with tank drain, manual air release valve, 35 psi automatic pressure reliefvalve. Maximum flow rate _____ GPM at 20 GPM per square foot filter surface area.

MEDIA ___ Standard: Quartzite or silica in nature, hard, not smooth, uniformity coefficient of 1.7, relativesize of .45 to .55 mm, containing no more than 5% flat particles or more than 1% clay,loam dust, or other foreign material. Media weighs 100 lbs. per cubic foot.

NOTE: Backwash flow rate, irrespective of water source, must be no less than 75% and no greater than 100%of the vessel's designed maximum gpm. Backwash duration is 1.7 minutes and is not adjustable.


NSF Listed


®

Form TF-COMP:4/98

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Series

TF Components

MODEL NO.ITEM NO. QTY. DESCRIPTION TF-18 TF-24 TF-30

1 1 Filter Vessel P330500 P331111 P3311212 1 Multiport Valve M870286 M870286 M8702863 1 Pump assembly

Single phase P171921 P171931 P171980Three phase P171923 P171939 P171982

4 1 Base P283920 P283920 P2839215 1.5' PVC Piping

1

1

2

2

5

3

3

4

4

5


NSF Listed


®

Form TF-DIM:9/95

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Series

TF Dimensions

D = Pump Suction 2" FPTE = Backwash Discharge 1-1/2" FPTF = Filter Discharge 1-1/2" FPT

DIMENSION A B C D E F

TF-18 40 24 41 13.5 20.5 12.25

TF-24 40 24 41 13.5 20.5 12.25

TF-30 48 40 48 13.5 20.5 12.25

All dimensions are in inches.

NOTE: All dimensions are approximate and must be field verified.

A

D

C

B

EF


NSF Listed


®

Form TF-CURVE:9/95

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Series

TF Pump Curve

PERFORMANCE CURVE

CAPACITY IN GALLONS PER MINUTECurve based on 3450 RPM impeller speed. 50 cycle units available.

TF-30

TF-24TF-18


NSF Listed


®

Form TF-PTS-18:3/99

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Series

TF Parts-TF-18" Filter Vessel

Item Part # Description Qty1 M871812 Valve, pressure relief 12 M902520 Elbow, brass, street, 90˚, 1/4" 13 M871817 Valve, air relief, hi-flo w/hose & clips 1

M871818 Valve only, air relief, hi-flo 14 P331091 18" Tank lid AFT 11-94 15 P330542 Clamp, tnsn cntrl, AFT 11-94 16 P330550 Spring/barrel nut assy AFT 11-94 17 P330555 Washer 18 P331139 O-ring, 18" tank B4 11-94 1

P330544 O-ring, 18" tank AFT 11-94 19 P330546 Backup ring, 18" tank AFT 11-94 1

10 P331129 Overdrain 111 P331133 Service Kit, Air Tube B4 5-95 112 P331124 Gasket, bulkhead (interior) 113 P331148 Gasket, bulkhead (exterior) 114 P331116 Spacer, concave 115 P331149 Locknut, bulkhead 216 P331119 Inlet pipe assembly, 18” vessel 117 P331166 Screw, hub, stainless steel 118 P331167 Washer, 1/4" stainless steel 119 P331190 Hub with air bleed tube, 18" 120 P331154 Lateral, 18" vessel (7" long) 821 P331138 Gasket, hub 122 P331195 Washer, bulkhead 123 P331196 Gasket, bulkhead 124 P331096 Plug, 1-1/2" drain with o-ring 125 P331097 O-ring, drain plug 126 P331162 Outlet pipe assembly, 18” vessel 127 P331147 O-ring B4 1-1-90 1

P331172 O-ring AFT 1-1-90 128 P331108 Body union, 1-1/2 male 229 P331117 Nut 230 P331092 Tank bottom, 18” vessel 131 P331090 Base, tank, 18” vessel 1

Not ShownP283938 Gauge panel assembly 1P181035 Gauge, 0-60psi, 2.5", liquid filled 2P181115 Backwash sightglass 1


NSF Listed


®

Form TF-PTS-24:3/99

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Series



M871818 Valve only, air relief, hi-flo 14 P331093 24" Tank lid AFT 11-94 15 P330542 Clamp, tnsn cntrl, AFT 11-94 16 P330550 Spring/barrel nut assy AFT 11-94 17 P330555 Washer 18 P331127 O-ring, 24" tank B4 11-94 1

P330544 O-ring, 24" tank AFT 11-94 19 P331114 Backup ring, 24" tank AFT 11-94 1

10 P331129 Overdrain 111 P331133 Service Kit, Air Tube B4 5-95 112 P331124 Gasket, bulkhead 113 P331148 Gasket, bulkhead 114 P331116 Spacer, concave 115 P331149 Locknut, bulkhead 216 P331122 Inlet pipe assembly, 24” vessel 117 P331166 Screw, hub, stainless steel 118 P331167 Washer, 1/4" stainless steel 119 P331192 Hub with air bleed tube, 24" 120 P331153 Lateral, 24" vessel (10" long) 821 P331138 Gasket, hub 122 P331195 Washer, bulkhead 123 P331196 Gasket bulkhead 124 P331096 Plug, 1-1/2" drain with o-ring 125 P331097 O-ring, drain plug 126 P331163 Outlet pipe assembly, 24” vessel 127 P331147 O-ring B4 1-1-90 1

P331172 O-ring AFT 1-1-90 128 P331108 Body union, 1-1/2 male 229 P331117 Nut 230 P331094 Tank bottom, 24” vessel 1

Not ShownP283938 Gauge panel assembly 1P181035 Gauge, 0-60psi, 2.5", liquid filled 2P181115 Backwash sightglass 1


NSF Listed


®

Form TF-PTS-30:6/99

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Series



M871818 Valve only, air relief, hi-flo 14 P331031 30" Tank lid AFT 11-94 15 P330542 Clamp, Tension Cntrl, AFT 11-94 16 P330550 Spring/barrel nut assy AFT 11-94 17 P330555 Washer 18 P331139 O-ring, 30" tank B4 11-94 1

P330544 O-ring, 30" tank AFTER 11-94 19 P330546 Back-up ring, AFTER 11-94 1

10 P331129 Overdrain 111 P331133 Service Kit, Air tube B4 5-95 112 P331177 Overdrain line assembly 113 P331156 Screw, hub 114 P331157 Washer, 1/4" stainless steel 115 P331194 Hub with air bleed tube, 30" 116 P331135 Lateral, 30" vessel (13" long) 817 P331132 Nut, lock, 2” brass 118 P331178 Gasket, Hub 119 P331155 Elbow, 2", 90° t x t, sch 80 120 P331142 Drain assembly 121 P331032 Tank bottom, 30” vessel 1

Not ShownP283938 Gauge panel assembly 1P181035 Gauge, 0-60psi, 2.5", liquid filled 2P181115 Backwash sightglass 1P331143 O-ring, drain, 30” tank 1


NSF Listed


®

Form TF-PTS-AUTO:3/97

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Series

TF Parts-Autotrol

Item Part # Description Qty1 M940120 Screw, face plate 42 M940130 Switch box cover 1

NS M940480 Pawl cover 13 M940140 Switch screws 24 M940150 Switch 1

NS M940155 Terminal circuit board 15 M940120 Cam motor screws 26 M940160 Cam motor 17 M940500 Pawl 18 M870293 Output gear assembly 19 M870297 Actuator pin 1

10 M940510 Retaining ring 111 M940180 Switch box assembly (1-10) 112 M940220 Camshaft assembly 113 M940190 Cycle position indicator 114 M940450 Flag pin 115 M940420 Drain plug 3

M940381 Sensor lever lock out assembly 1(Items 16, 17, 18, & 19)

20 M940310 Manual over-ride lever lock-nut 121 M940290 Manual over-ride lever 122 M940270 Sensor lever 123 M940300 Manual over-ride lever bearing 124 M940230 Sensor diaphragm cover screw 425 M940240 Sensor diaphragm cover 126 M940250 Sensor diaphragm screw 127 M940260 Sensor diaphragm 128 M940280 Sensor diaphragm O-ring 129 M940320 Rinse valve retaining ring 130 M940330 Rinse valve spacer 131 M940340 Rinse valve assembly 132 M940350 Rinse valve, O-ring 1

M940354 Rinse valve lever assembly 1(Items 33, 34, 35, & 37)

36 M940250 Rinse lever post screw 238 M940430 Camshaft bearing 139 M940440 Camshaft bearing lock-nut 140 M940100 Top cover 141 M940110 Top cover screws 4


NSF Listed


®

Form TF-PTS-SPM:9/99

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Series

TF Parts - Strainer, Pump, & Motor

item Part # Description Qty.1 P171962 Clamp 6" 12 P171908 Lid, lexan 6" 13 P171925 O-ring 6" 14 P172023 Basket, strainer 6" 15 P172803 Trap body, 6" x 2" 16 P171905 Plug O-ring 17 P171914 Plug 18 M808698 Bolt, trap to volute 48A P171893 Strainer assembly (1-7) 19 P171915 Pump base 1

10 P171917 Lockwasher 2

Common Part Numbers for TF-18,-24, and -30

Item Part # Description Qty.11 P171920 Hex bolt 5/16-18 x 3/4 212 P170415 Gasket, trap to volute 113 P170416 Volute plug 114 P170417 Volute 116 P171976 Seal 117 P171974 Gasket, volute 118 P171903 Hex bolt, 3/8-16 x 5/8 419 P170420 Bracket 120 P171902 Hex bolt, 5/16-18 x 5/8 821 P171901 Screws, set 322 P171904 Shaft extension 1

Uncommon Part NumbersTF-18 TF-24 TF-30

15 P171971 P171972 P171973 Impeller 123 P171922 P171938 P171983 Pump assembly, (items 9-22) 124 P171945 P171948 P171937 Motor, single phase, 3600 rpm (TEFC) 124 P171941 P171942 P171944 Motor, three phase, 3600 rpm (TEFC) 1


NSF Listed


®

Form TF-ELEC-120-1:4/98

- 18 -


Series

TF Electrical-120V Single Phase


NSF Listed


®


- 19 -


Series

TF Electrical-208/230V Single Phase


NSF Listed


®


- 20 -


Series

TF Electrical-208/230V Three Phase

230V


NSF Listed


®


- 21 -


Series

TF Electrical-460V Three Phase

460V


NSF Listed


®


- 22 -


Series

TF Electrical-575V Three Phase

575V

- 23 -


NSF Listed


Optional Backwash Regenerator

®

Form TF-BWR:4/98


Tower-Flo® Filters are equipped to automatically backwash using water from the same source they are filtering. In the vast major-ity of sidestream applications, this is perfectly satisfactory. However, in some cases, it is not desirable to dispose of system waterfor filter backwashing. For those cases, Tower-Flo® offers this optional Backwash Regenerator

TOWER-FLO®’s optional Backwash Regenerator creates a zero discharge operating circumstance in which no water is lost fromthe cooling tower by filter backwashing. With a Backwash Regenerator, the backwash water stream -- which is normally plumbed towaste -- is routed through a bag filter vessel and back into the cooling tower. The Backwash Regenerator option is particularly use-ful in situations where water must be conserved, where makeup water is limited, or where chemical or solid contaminants in thebackwash water are environmentally hazardous. The bag filter vessel is equipped with a differential pressure switch which activatesa flashing red light mounted on the control panel to alert the operator when the Backwash Regenerator bag needs manual cleaning.

The Backwash Regenerator option is available on Series TF, TFD, and TFH-SS systems. It is also available on TFH systems,however note that the TFH vessel is rated for 100 psi versus the 50 psi rating of the Regenerator vessel. Backwash Regeneratorsmay also be fitted to some TFB systems; contact Tower-Flo® to discuss specific applications.

CleaningTo clean the Backwash Regenerator, turn the control panel selector switch to the off position; this stops the filter pump and turns theRegenerator indicator light off. Release pressure from the filter system by opening both the pressure release valve on the top of thefilter vessel and the petcock valve on the top of the Regenerator vessel. Remove the top of the Regenerator vessel and remove thebag for cleaning. Replace the bag and secure the regenerator vessel lid by tightening the band clamp, while gently tapping aroundthe perimeter of the clamp with a soft head hammer. Then follow the filter system’s start up procedures to return the filter to service.

SpecificationsThe Backwash Regenerator, when ordered as original equipment, is fully wired, plumbed, and mounted to the Tower-Flo® filter skid. TheRegenerator vessel is fabricated of 18 gauge type 304 stainless steel. Influent and effluent connections are 2" MPT. The unit is accessi-ble by removal of the vessel top which is secured by a perimeter stainless steel band clamp. The vessel is designed for a working pres-sure of 50 PSI and maximum flow of 100 GPM. The Backwash Regenerator bag is fabricated of synthetic canvas material and designedto remove contaminants to 20 microns in size. This option adds approximately 200 lbs. to the operating weight of the filter system.

Backwash Regeneratorshown on Series TF Filter


NSF Listed


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Form TF-BWR-PTS:4/98

- 24 -


Parts-Backwash Regenerator

Item Part # Description Qty10 P284850 Bleeder valve 19 P284851 Top head assembly 18 P284858 Carriage bolt 17 P284859 Clamp assembly 16 P284852 Band assembly 1

(Items 3, 4, 7 & 8)5 P284853 O-ring, tank 14 P284856 Knob-clamp assembly 13 P284857 Washer, 5/16 ss 12 P284818 Bag assembly 11 P284854 Tank assembly 1

Parts

Fitting Size 2" NPT

Dimensions: A 50"B 31-5/8"C 2-1/4"D 26-1/4"

Bag Holding Capacity 1258 CU IN

Dimensions

NOTE:

The Backwash Regenerator’s bag filter --like the sand media in the sand filter -- willremove particles 20 microns and largerwhen clean. Material accumulated in thebag contributes to finer particle removal asthe bag becomes “dirtier” over the course ofseveral backwashes. Therefore, the ownershould expect initial backwash waterreturning from the regenerator to the basinto be cloudy in appearance each time thebag has been cleaned. This is due to theconcentration of particles under 20 micronscontained in the backwash water.


NSF Listed


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Recommended Spare Parts List

Form TF-SPARE:5/99

Component & Part Part NumbersItem No. Common TF-18 TF-24 TF-30

Strainer, Pump and Motor (Item No. refers to Form TF-PTS-SPM: 4/94 "Parts - Strainer, Pump, & Motor")O-ring, 6" 3 P171925 X X XGasket, trap to volute 12 P170415 X X XSeal 16 P171976 X X XGasket, volute 17 P171974 X X X

Autotrol (Item No. refers to Form TF-PTS-AUTO:7/94 "Parts-Autotrol")Cam motor 6 M940160 X X XPawl 7 M940500 X X XOutput Gear 8 M870293 X X XFlag pin 14 M940450 X X X

Vessel (Item No. refers to Forms TF-PTS-18, TF-PTS-24 and/or TF-PTS-30 "Parts-Filter Vessels")Air bleed assy AFT 11-94 12/12/9 X P331190 P331192 P331194O-ring, tank, B4 11-94 7/7/6 X P331139 P331127 P331139O-ring, tank, AFT 11-94 7/7/6 X P330544 P330544 P330544Lateral (complete set is 8) 15/15/13 P331154 P331153 P331135


NSF Listed


Installation Issues®

Form INISS:1/99

- 26 -


Tower-Flo® generally recommends sidestream installation of its filter systems and its standard systems are designed andbuilt for sidestream application. Sidestream filtration means a filter system which draws water from and returns it to astatic pressure reservoir of water in the cooling loop, completely independent of the cooling water recirculation sys-tem. Usually, that reservoir of water is the basin of the cooling tower or sometimes it may be a chilled water storagereservoir in the cooling loop.

However, there are occassions where a design has called for slipstream installation. Slipstream filtration means a filterwhich is installed on the pressurized recirculation piping system, "slipping" a portion of the chilled water recirculationflow through the filter system. Depending on the points of connection to the recirculation piping, the slipstream maybe either under the influence of the discharge side or the suction side of the recirculation pump.

Slipstream installation significantly reduces filter effectiveness (see Tower-Flo’s Technical Bulletin entitled Sidestreamvs. Slipstream Installation). Further,

NOTE: Series TF Filters are not designed for slipstream installation.

If the filter system you are about to install is to be installed in any other fashion than sidestream, please be sure thatnecessary consideration has been given to operating pressure of the filter system and flow promotion issues. If you, asthe installer, have any questions, contact your local Tower-Flo® Representative or contact the Tower-Flo® Water FilterSystems Division of United Industries, Inc.

INSTALLATION STYLE

BASIN SWEEPER PIPING SYSTEMA basin sweeper piping system will use the return flow of filtered water from the filter system to help sweep solids towardsthe filter's suction point. However, it is very important to have a reasonable expectation of such a basin sweeper pipingsystem. It must be understood that the primary purpose of the filter system is the continuous removal of suspendedsolids from the water being recirculated through the cooling loop. The basin sweeper piping system provides a sec-ondary benefit by promoting the movement solids across the basin floor toward the filter suction point for removal.

While such a system can reduce the time and effort required for regular basin clean-out, even the best designedsweeper piping system cannot keep a cooling tower basin perfectly clean nor sweep effectively around all apperti-nances. If you plan to use a basin sweeper piping system, please review the information on the next page to deter-mine the proper number of nozzles or perforations to be used with your basin sweeper piping system.

IF YOU, AS THE INSTALLER OR OWNER OR OPERATOR, HAVE ANY QUESTIONS ABOUT ANY ASPECT OFYOUR INSTALLATION AND/OR OPERATION OF THIS TOWER-FLO® FILTER SYSTEM, CONTACT YOURLOCAL TOWER-FLO® REPRESENTATIVE OR CONTACT THE TOWER-FLO® WATER FILTER SYSTEMS DIVISION OFUNITED INDUSTRIES, INC., BEFORE START-UP OF THIS FILTER SYSTEM.


NSF Listed


Basin Sweeper Piping®

Form SWEEP:4/98

- 27 -


DISCHARGE OPENINGS: The sizing of holes in a basin sweeper piping system evolves from the decision of the type of DIS-CHARGE openings to be used; either simple holes, sweeper-eductor nozzles, or a combination of those two types. Different cri-teria must be used to determine the number of discharge holes and/or nozzles to be used for a given application, as follows:

HOLES ONLY: The total open area of discharge line openings should be equal to or slightly greater than the total open areaof the discharge pipe size. Use the table or the formula below to determine the size and number of holes to be used.

NOZZLES ONLY: The total number of nozzles will be the flow rate of the filter system divided by 5 gpm per nozzle.

COMBINATION OF NOZZLES & HOLES:1) start with the filter flow rate.2) determine the preliminary number of nozzles you want to use.3) multiply that number of nozzles by 5gpm per nozzle.4) subtract the outcome of 3) from the total flow rate of the filter system (this is the portion of the filter flow rate consumed by

nozzles; this number cannot exceed the filter's flow rate; if it does, return to the nozzle only instructions).5) divide the remaining flow rate by 3 gpm to determine the number of 1/4" holes to be used in conjunction with the nozzles.

SUCTION OPENINGS: Irrespective of the type of discharge openings selected, the number and size of suction openings willalways be determined by the following: the total open area of suction line openings should be equal to or slightly greater than125% of the total open area of the discharge pipe size.

1.5" 50 63 19 24 11 14 36 45 16 20 9 122" 68 85 31 39 18 23 61 77 27 34 16 20

2.5" 98 123 44 55 25 32 87 109 39 49 22 283" • • 67 84 38 48 • • 60 75 34 434" • • 116 145 65 85 • • 104 130 59 746" • • • • 148 185 • • • • 133 1678" • • • • 255 319 • • • • 233 292

SCH 40 SCH 80PIPE # 1/4" holes #3/8" holes # 1/2" holes # 1/4" holes #3/8" holes # 1/2" holesSIZE DIS SUC DIS SUC DIS SUC DIS SUC DIS SUC DIS SUC

Suggested Number of Pipe Holes

Inside Diameter of Common Pipe Sizes1.5" 2.0" 2.5" 3.0" 4.0" 6.0" 8.0"

Sch 40 1.610 2.067 2.469 3.068 4.026 6.065 7.981Sch 80 1.500 1.939 2.323 2.900 3.826 5.761 7.625

TO CALCULATE NUMBER AND SIZE OF DISCHARGE AND SUCTION OPENINGS

Steps: 1 Calculate open area of selected discharge pipe size based on its inside diameter (π r2);2 Calculate open area of selected discharge hole size (π r2);3 Divide result of Step 1 by result of Step 2 to find number of holes in discharge piping (round up);4 Multiply result of Step 3 by 1.25 to find number of suction holes (round up).

The calculated number of discharge openings should be spaced evenly around the discharge pipe run or across pipe runsdesigned to influence specific areas. Suction holes should be spaced evenly around the suction header in the water basin orreservoir. Common sense should always govern the selection of hole sizes, the resulting number of holes, and the placement ofthose openings; keep the number of holes to be drilled to a practical, manageable number for the run of pipe.

The tables below will help you select the size and number of holes for most Series TF, TFD, TFD2, and TFH installations. TheInside Diameter Table provides the information necessary for you to calculate hole sizes and number for other installations.


NSF Listed


®

Form TF-INSTAL1:9/95

- 28 -


Series

TF Installation

STEP 1. LOCATE FILTER

Place the TOWER-FLO® Filter System on a firm level surface. The TOWER-FLO® Filter does not need to beanchored, unless required by local code. Select a location close to the cooling tower to allow for convenience, acces-sibility and serviceability. If the filter is to operate year-round, exposure to winter conditions should be a considera-tion in your location decision.

Balance Leg with Air Gap to prevent gravity drain of basin

STEP 2. PLUMBING

A) Fabricate and install sweeper piping system in water source with holes sized according to the Sweeper PipeSizing tables and formula; or if using TOWER-FLO® Sweeper-Eductor Nozzles, follow directions supplied withthe nozzles. The sweeper piping system should be designed so that water returning from the filter sweeps par-ticulate matter toward the suction line to the filter which is usually installed at or near the lowest point in thesource water basin.

STEP 2. CONTINUED ON NEXT PAGE

WARNING

If your TOWER-FLO® is to be installed BELOW the static water level of the tower sump:1) Install valves on the inlet, waste and outlet piping to permit removal or maintenance of filter system without draining the

tower.2) Install a balance leg with an air gap in the waste line (as shown below) to prevent gravity from draining the sump if power

loss occurs to the control valve during a backwash cycle.a) In lieu of a balance leg, you may install a normally closed solenoid valve in the waste line to prevent accidental drain-

ing of the tower; consult with TOWER-FLO® for proper electrical connections.

WARNING

Your TOWER-FLO® Filter is standardly equipped with a self priming pump. This pump will prime on a straight vertical lift of up to10 feet. However, when the need for self priming exists, horizontal pipe runs significantly reduce the ability of the pump to primeitself. When installing your filter in a self priming position, limit horizontal pipe runs to a maximum of 18 inches. If this limit is notpractical for your installation, we recommend the use of a foot valve in the suction line in order to maintain self priming capability.

WARNING

TOWER-FLO® Filters should never be installedon a dirty basin or reservoir. Installing the filteron a dirty basin will cause a nearly constantbackwash condition. Always clean accumulatedmud, silt, and debris from the bottom of the basinor reservoir BEFORE installation of the side-stream filter.


NSF Listed


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- 29 -


Series

TF Installation

STEP 3. ELECTRICAL

All TOWER-FLO® systems are pre-wired at the factory and require only field connections to power source. Proceedas follows:

A) Check power supply wiring and related components for compatibility with system making sure local code require-ments are met.

B) Make all contacts according to the appropriate phase/voltage wiring schematic.

Backwash Sight Glass Installation

STEP 2. PLUMBING continued

B) Assemble the 1/4" brass tee, pressure relief valve and high-flow air relief valve (all shipped inside the strainerpot) and install on the top of the filter vessel.

C) Install the strainer basket assembly shipped with unit onto filter unit's pump inlet*.

D) Connect piping from water source to strainer inlet*.

E) Install return piping from filter’s control valve outlet to water source*.

F) Install waste piping from backwash outlet of filter’s control valve to drain. The backwash sight glass shipped withthe unit should be installed in the waste line (as shown below) in a position which allows convenient observationof backwash flow. Make certain the disposal point will handle the unit's stated backwash flow.

G) To permit drainage of filter system for winterization, add drain valve at lowest point in side stream piping

*TOWER-FLO® recommends the installation of unions in these three plumbing connections for ease of removal,should it become necessary for any reason.

NOTE

All plumbing connections shouldfollow accepted plumbing proce-dures. Pipe joints should be sealedusing teflon tapes without adhesivebackings or with compounds suit-able for use with PVC and ABSplastics.


NSF Listed


®


- 30 -


Series

TF Installation

CAUTION

Extreme care must be taken while installing filter media to prevent damage to the lateral assembly.

STEP 4. FILTER MEDIA LOADING

A) Open the air relief valve. This is a pressurized system which should never be opened without first bleeding offthe pressure; make it a habit to always open the air relief valve even when the system is not pressurized!

B) Remove the tank top by loosening the perimeter band clamp. Never attempt to open the clamp while there ispressure in the filter.

C) Remove the overdrain and air relief tube, inspect the underdrain laterals and ensure the slots in the laterals arefacing downward.

D) Fill the tank with enough water to just cover underdrain laterals. This water will act as a buffer to protect lateralsduring media loading.

E) Gently "float" media under and around the laterals until they are completely covered, then slowly add the rest ofthe media provided with the unit. See the specification table found in this manual for required amount.

F) Replace overdrain and air relief tube.

G) Replace tank top as follows (This procedure must be followed anytime the vessel has been opened!):

1) Be certain o-ring retainer band and o-ring are in position in the lower tank half.

2) Place the filter lid over the lower tank half, sandwiching the o-ring in between.

3) Holding the ends of the filter clamp apart, position the center segment over both upper and lower tank halfflanges.

4) Bring the ends of the clamp together while inserting the T-bolt into the trunnion (see label on top tank half).

5) Using Filter Clamp Installation Instructions decal on the top tank half as a guide, place tension-indicatingspring, washers and nut on the T-bolt and then hand tighten the nut (NOTE: some 24-inch filter tanks will nothave the tension spring style clamp fastener so they will not have the spring).

6) Recheck the filter clamp for proper seating on tank flanges.

7) Begin to tighten the nut using a 5/8" wrench.

8) While tightening the nut, tap all around the perimeter of the filter clamp with a soft headed mallet (or similartool) to insure uniform loading and proper seating of the clamp.

9) Continue tapping and tightening until the spring coils of the spring touch each other but do not tighten beyondthis point (NOTE: 24-inch tank clamps, without the tension spring, must be tightened with a torque wrench to65 inch-pounds).

NOTE

1 Cubic Foot of .45-.55 mm sand media = 100 lbs


NSF Listed


®


- 31 -


Series

TF Start Up

START UP PROCEDURE

A) Secure drain plugs in filter vessel, pump and pump strainer

B) Ensure suction, discharge (return) and waste line valves are open.

C) Check proper pump rotation with arrow on pump housing by turning system on/off rapidly. If pump rotation isbackwards, check electrical.

D) Remove strainer lid. Fill strainer pot with water to facilitate priming of pump. Replace strainer lid according toinstructions.

E) Open the black plastic, high-flow air relief valve by turning it 1/4 revolution to its full open position. Air relief valvemust be open before starting pump.

F) Start pump. Turn control panel switch to on position. Allow up to 3 to 4 minutes for pump to prime. Pump isprimed when strainer remains filled with water. If pump does not prime, repeat steps D, E, and F.

G) Close air relief valve when a steady stream of water flows from the valve into the clear plastic tubing -- this indi-cates that all air has been bled from the tank.

H) Check system plumbing for leaks and repair.

I) Your TOWER-FLO® is now in operation.

J) NOTE FILTER'S INFLUENT PRESSURE READING AT START UP AND RECORD FOR FUTURE REFERENCE.

K) Allow system to filter for a brief period of time (approximately 5 minutes) then manually activate and observe abackwash cycle. This will rinse construction dirt and debris from the system, plus it will insure proper location ofthe internal workings of the automatic backwash control valve (See drawing on next page).

NOTE: Small grains of sand may leave the filter during backwashing or may even appear at the return line when the fil-ter is first started. This is characteristic of permanent media filters and should clear up after the first few back-wash cycles. Should sand continue to appear at the return line over time, this is evidence that a collection lat-eral was cracked or broken during media loading and that lateral must be identified and replaced.

WARNINGS

THIS SYSTEM OPERATES UNDER PRESSURE AND SHOULD NEVER BE OPENED UNTIL THE PUMP ISSHUT OFF AND THE PRESSURE IS BLED OFF THROUGH THE AIR RELIEF VALVE.

Never operate filter at pressures over 50 psi. Such pressures indicate need for complete cleaning or a malfunction.

The filter system is designed to withstand water temperatures up to 120°F/49°C.

Start Up Date ______________________

Influent Pressure ______________________

Effluent Pressure ______________________


NSF Listed


®

Form TF-CGP:9/95

- 32 -


Series

TF Auto Backwash Valve

CAM MOTOR, GEAR, PAWL DETAIL

IMPORTANTAt initial start up, allow system to filter for abrief time (5 min. or less) and then manual-ly backwash unit. This action will insure thepawl positioning is correct for filter mode.


NSF Listed


®

Form TF-OPER1:9/95

- 33 -


Series

TF Operation

SETTING THE BACKWASH INITIATION

The numbers on the decal below the adjusting screw on the switchbox (shown below) indicate the final pressure dropin pounds per square inch across the sensor diaphragm which will initiate backwash. This filter is factory preset at15 psi. At this setting, the filter will backwash when the pressure drop across the filter becomes 13 psi, assuming a2 psi loss in the face piping betweenthe control and the filter. If the cleanfilter has a 3 psi pressure drop, theincrease in pressure drop is 10 psi asthe bed becomes dirty.

If the clean filter has a higher pressuredrop, such as 12 psi (including theface piping), the adjustment should beapproximately at 22 psi on the decal ifan increase of 10 psi is desired beforebackwash initiation. On filters whichhave only one gauge located at thetop of the tank, backwash is desiredwhen the gauge shows a rise of 5 psi.Set the adjustment 10 psi above thedrop through a clean filter.

REMOVING THE SWITCH BOX

In many cases, it's to the owner's advantage to replace the entire switch box assembly rather than to service its indi-vidual parts. (Part #’s referenced below correspond to Item #’s found on the Autotrol Parts List).

1. Disconnect electrical power to the control.

2. Remove switch box cover, remove field wiring leads from the control'sterminal block, and disconnect conduit (or equivalent) from the switchbox bosses.

3. Remove the sensor diaphragm screw (part #26). Disengage sensor lever(part #22) from sensor diaphragm (part #27) tang.

4. Remove the camshaft bearing and locknut (parts #38 & #39). Slide camshaftassembly (part #12) down, and pull out.

5. Pull flag pin (part #14) as shown.

6. Slide switch box assembly out.

When re-installing the camshaft assembly, rotate the drain valve cam to open thedrain valve (as shown on the Winterization page). Then after replacement, manually initiate backwash and the drain cam willautomatically position itself.


NSF Listed


®

Form TF-MNTN1:4/98

- 34 -


Series

TF Maintenance

The TOWER FLO® filtration system is virtually maintenance free. The following are guidelines to ensure proper per-formance and increase longevity of the system.

DAILY

1) Release trapped air in filter vessel through air release valve.

WEEKLY

1) Check all plumbing connections for leakage.

2) Check all electrical connections and components for signs of malfunction or poor connection.

3) Visually inspect strainer basket through lid. If cleaning is necessary, turn system off, release pressure from filtervessel, remove strainer lid, clean basket, replace basket and lid following recommended safety procedures, andrestart system following the Start Up Procedure.

4) Check pressure gauges for proper operation.

MONTHLY

1) Place unit in "off" position.

2) Check pressure release valve for proper operation.

3) Remove filter top for visual inspection of the surface of the media bed. See NOTE below.

YEARLY

1) Inspect media bed for visible contamination or extraneous material. Media should be tested to a depth of 8" to 12".

2) Maintain proper level of media bed.

3) Clean and lubricate output gear where it penetrates the switchbox housing and lubricate cam lobes where theycontact the metal flapper valves. Use a light coating of a silicone lubricant.

NOTE: The sand media bed is the key to efficient and effective filtration in this type filter system. Over a period of time,certain foreign matter and materials can become imbedded in the upper portion of the sand media bed andwill resist being flushed during the backwash cycle. Therefore, the media bed should be visually inspected onceeach month but absolutely no less than once each year.

Visual inspection is accomplished by turning off the pump, opening the air relief valve, releasing the band clampon the filter vessel and removing the top portion of the tank (lid) to expose the surface of the media bed. Inspectthe surface of the media bed and remove any foreign material , then probe the bed in several random places toa depth of 8 to 12 inches looking for evidence of foreign matter and materials down into the media bed. If for-eign matter and materials are found to be present, remove the contaminated media and replace with an equalvolume of .45-.55mm filter media.

After inspection, replace the vessel lid and the band clamp assembly by CAREFULLY AND EXACTLY fol-lowing the Filter Clamp Installation Instructions decal permanently affixed to the vessel lid.


NSF Listed


®

Form TF-WINT1:9/95

- 35 -


Series

TF Winterization

For SEASONAL SHUTDOWN of the TOWER-FLO® Filter System:

1. ELECTRICAL: Disconnect electrical power.

2. VALVE: Remove the top cover and the blue drain plug located on the side of the valve body away from the ves-sel. Open the drain valve by rotating the drain cam, as shown below. Push open the backwash valve to assistdrainage. Pump the sensor lever several times to force water from the diaphragm case. Release the backwashand drain valves, and replace the drain plug and the top cover.

3. PUMP: Drain liquid from the pump through the plug at bottom front section of volute. Addition of a good rustinhibitor into liquid end of the pump is recommended to prevent corrosion. Be sure the motor is kept dry and cov-ered.

4. FILTER: Remove drain plug at rear of tank on TF-30 units and disconnect the union connecting filter to valve. ForTF-18 and TF-24 units, disconnect the unions and allow the tank and valve to drain completely. After draining thetank, reconnect the unions on all units and replace the drain plug on TF-30.

5. GAUGES: Disconnect influent and effluent gauge tubing from the valve body.

For YEAR-ROUND OPERATION of the TOWER-FLO® Filter System:

In installations where freezing may occur, heat tracing of all lines, especially tubing to pressure gauges is highlyrecommended. Use standard insulation and freeze protection methods for your region.

- 36 -

PROBLEM POSSIBLE CAUSE SOLUTION

PUMP STOPS A Snap acting switch: A1. Lever bent, not closing contacts 1. Replace switch box assembly or snap switch2. Burned out 2. Check amperage load, then replace switch box

assembly or snap switch3. Switch out of position 3. Reposition snap acting switch

B Pump motor or circuit B Check circuit breakers, wire connections (loose, bro-ken or incorrect), thermal protector in motor startertripped. Allow motor to cool, then try to restart

WATER LEVEL DROPS A Leak past rinse or drain valve A Flush out foreign matter by manually initiating backwash

B Power supply interrupted to pump B Pipe the waste line from the control to prevent gravityduring backwash in below deck draininginstallation with center drain

C Control's body develops leak C Replace body assembly

SAND BEING DRIVEN A Cracked or broken lateral(s) A Replace cracked or broken lateralsTO TOWER

BACKWASHES A Too low an adjustment for backwash A Increase setting by two to three psiTOO OFTEN initiation

B High pressure drop through filter B Inspect filter bed for foreign material and contaminateddue to clogging or caked sand and remove from tank. Replace with

clean, new silica sand only the old sand removed

C Output gear spring broken or C Replace output gear or return spring to proper positionout of position

BACKWASHES TOO A Too high an adjustment for A Decrease setting by two to three psiINFREQUENTLY OR backwash initiationNEVER

B No water flow B Check for1. Loss of pump prime2. Clogged hair and lint strainer

C Ruptured sensor diaphragm C Replace sensor diaphragm. The unit may be oper-ated manually until this repair is done

D Cam motor stalling: D1. Low voltage 1. Increase to 90% of rated voltage; replace cam

motor or switch box assembly2. Top cover left off and foreign 2. Replace switch box assembly and secure top cover

matter entering cam3. Cam motor stripped 3. Replace cam motor or switch box assembly4. High head on drain line 4. Install drain line balance leg; replace cam motor

or switch box assembly

CONTINUED ON NEXT PAGE

The Trouble Shooting pages are provided in order to give you the ability to locate and possibly remedy problems thatmay occur during normal usage of your TOWER-FLO®. If you are unable to solve the problem please do not hesi-tate to contact us.

TROUBLE SHOOTING

Form TF-TS1:11/94

- 37 -

E Cam motor burns out or stops E1. Over voltage 1. Reduce to 110% of rated voltage; replace cam

motor or switch box assembly2. Electrical short 2. Check wiring; replace cam motor or switch box

assembly3. Repeated over-loading resulting 3. Replace cam motor or switch box assembly and

in gear failure within motor review causes or cam motor stalling above

F Low pressure drop through filter F Inspect filter bed for proper media level, add clean, due to channeling new silica sand as required

G Actuator pin broken G Replace actuator pin

H Sensor port plugged H Remove sensor cover and clear obstructionI Retainer pin broken or missing I Remove all parts of old retainer pin, align switch

box and valve body, install new retainer pin

PUMP LOSES PRIME A Strainer cover leaking A Check lid and O-ring for defects and ensure that itis installed tightly

B Water level too low B Add water

C Suction line clogged or leaking C Inspect and repair as needed

UNUSUAL NOISES A Plumbing vibration A Ensure all plumbing anchored properly

B Bad motor bearings B Repair or replace motor

C Impeller C1. Cavitation 1. See A, B, and C directly above2. Foreign objects in pump 2. Check volute and impeller

TROUBLE SHOOTING, continued

Form TF-TS2:11/94

- 38 -

sec 4 tf - tower-flo

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