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3. 

LAKOS sand media is shipped separately in 50 lb. bags and gravel shipped 

in 80 lb. bags. The exact number of bags is determined by the actual 

system size (see chart below). Do not introduce media sand or gravel into 

the STS system until the system is placed in its final operating position. 

 

MEDIA SAND CHART 

 

MODEL 

MEDIA SAND REQ’D 

MEDIA GRAVEL REQ’D 

 

(LBS) 

(KG) 

(LBS) 

(KG) 

STS-18-045 

200 

91 

80 

36 

STS-24-075 

400 

181 

120 

54 

STS-30-110 

500 

227 

160 

73 

STS-36-165 

800 

363 

240 

109 

STS-48-310 

1300 

590 

560 

254 

 

 

 

 

 

 

 

IV. 

INSTALLATION OF STS SERIES MEDIA FILTERS 

 

1. 

A suitable foundation or pad must be provided to support the full operating 

weight of the STS system, including liquid (see media sand chart above). 

Use caution when moving the STS system into position. Move the system 

only by lifting the entire skid (forklift or crane/hoist). 

Never try and lift the 

equipment with hooks or straps attached to system piping or manifold, as 

damage could occur to the system. 

Anchor the unit to the foundation to 

prevent vibration and/or movement. 

 

2. 

All STS systems required flooded pump suction for proper operation. 

Please make sure that all inlet piping to the system is located to ensure 

that the pump is flooded with water at all times. 

If you system is equipped 

with a self priming pump this will not apply. 

 

3. 

The control panel must be wired for the proper voltage and rotation of 

the pump (see wiring diagram in control box door). All wiring should be 

done by a licensed electrician in accordance with local codes. Motor 

nameplates should be referenced for voltage, amperage draw, cycles, 

phase, speed and other motor information. 

 

4. 

Piping connections to and from the STS system should be of at least the 

same pipe size as the STS inlet and outlet connections. 

Do not install 

smaller diameter pipe anywhere on the inlet, outlet, or backwash lines. 

Check local codes to determine if appropriate backflow prevention is 

necessary at the inlet. 

 

 

 

Summary of Contents for STS Series

Page 1: ...FRESNO CALIFORNIA USA LS 644E Rev 12 20 Installation and Operators Manual Model Tower System Media Filters STS ...

Page 2: ...ump see drawing STS 0001 or by tapping directly to a basin or remote sump to achieve a given turnover rate Please note that all standard STS system pumps require flooded suction for proper operation Please contact the factory if you have a installation that will require the pump tolift water LAKOS does not recommend using the standard STS Series Media Filters for basin remote sump sweeping applica...

Page 3: ...rform such necessary product repairs or replace such product s at our expense This limited warranty does not cover any products damages or injuries resulting from misuse misapplication neglect normal expected wear chemically caused corrosion improper installation or operation contrary to factory recommendation Nor does it cover equipment that has been modified tampered with or altered without auth...

Page 4: ...hooks or straps attached to system piping or manifold as damage could occur to the system Anchor the unit to the foundation to prevent vibration and or movement 2 All STS systems required flooded pump suction for proper operation Please make sure that all inlet piping to the system is located to ensure that the pump is flooded with water at all times If you system is equipped with a self priming p...

Page 5: ...control backwash flow Check local codes to determine if appropriate backflow prevention is necessary on the backwash line 8 Determine if the drain for the backwash can handle the necessary backwash flow see backwash flow chart below All LAKOS STS Media Filters are factory set to backwash for 3 minutes If the drain can not handle the total backwash flow LAKOS does offer backwash holding tanks that ...

Page 6: ...the sand be added slowly so that no damage occurs to the laterals on the underdrain assembly Spread the sand level within the tank then close and secure the access port 11 Remove pressure gauges from packaging and install at the street tee connections on the inlet manifold elbow and tank outlet elbow 12 Double check the controller settings Factory settings should be as follows Pressure differentia...

Page 7: ...ed to top and is uniformly dispersed over the media bed 3 Water passes thru the media bed leaving debris behind 4 Filtered water exits the OUTLET 5 The media bed is cleaned through a backwash cycle at specified intervals or differential pressure The backwash cycle runs for a 3 minute period 6 System returns to normal operating mode 7 ...

Page 8: ...oosters are in use 1 Make sure that there is water in the main inlet line to provide flooded suction to the STS system pump DO NOT DRY RUN THE PUMP All pumps require a wet primed suction before starting using water as a lubricant for their seals John Crane type seals e g Silicon Carbide Seals can wear out in 20 seconds of dry operation It only takes a small amount of water to lubricate the seal an...

Page 9: ...using an STS SWP system 7 BACKWASHING Differential pressure across the filter media progressively increases as trapped particulate accumulate in the filter media bed On filter equipped with automatic backwash the backwash cycle is initiated upon reaching a 10 psig pressure differential Since units with automatic controls perform this function as necessary a detailed backwash procedure is only prov...

Page 10: ...tor from the plumbing entirely Store them indoors in a warm and dry place The STS tank and the purge line should also be drained of liquid to prevent damage from freezing To remove trapped water from the separator use a compressed air hose directed into the acceptance chamber Alternatively flush system withantifreeze Heat tracing or pipe insulation may be used Please contact your local supplier of...

Page 11: ...tlet These are not provided as a standard option by Lakos but are available if a valve kit is ordered Loosen the nuts or threaded stud and remove the lid Remove the basket and clean Inspect the O ring or gasket and if damaged replace Replace the lid and tighten the nuts B PUMP AND MOTOR Make sure that there are no leaks in the pump housing If leaks occur at the back of the volute casing you may ha...

Page 12: ...hanical interference inside the pump might be causing this problem Under rated circuit breakers contactors relays and or heaters will also cause this situation Use appropriately sized components Also undersized wires cables might cause shorting and overheating An excessively hot environment might also cause premature failure of motor and electrical components Avoid installing system in direct sunl...

Page 13: ...strainer basket As Required As Required As Required As Required As Required Inspect gaskets X X X Check pump shaft for free rotation X X Check operation of valves X X X Check lubricate clamp on filter tank access port X X Inspect over drain assembly media pack X X X Check pump motor for proper rotation X Check motor voltage current X X X Prime Pump X Check pressure gauge reading top of filter X X ...

Page 14: ...eplace with proper media sand ConsultyourLAKOSrepresentative 4 Backwash more often at lower differential pressure 5 Add proper sand media to tank s to specified level Consistently High Pressure Differential Excessive contaminant load restricts flow through the filters and prevents sufficient flow for backwashing Insufficient backwash flow Inadequate media sandvolume which may minimize coverage of ...

Page 15: ...s Media Sand Incorrect media sand i e too fine and too 1 Replace media with proper sizedmedia Appears Downstream small Broken damaged or missing lateral 2 Repair or replace laterals of the underdrain Obstruction inthe valve seat Rubber seatingis worn or damaged Actuator Diaphragm damaged Linkage outof adjustment 1 Remove the obstruction Backwash Valve Leaks 2 Replace Valve 3 Replace diaphragm 4 Ad...

Page 16: ...ir movement for cooling Make sure that motor has a fresh source of air for cooling 3 Check voltage with meter System Trips out when running and shuts down Overload setting is too low Supply voltageis incorrect System flow is too high Loose Wire 1 Check overload setting in control panel Overload setting should be just above full load amp value on motor nameplate 2 Check incoming supply voltage with...

Page 17: ...DS type size etc COOLING TOWER MODEL DOES SYSTEM USE HYDROBOOSTERS IN THE TOWER BASIN Yes No HOW MANY PER CELL Upon start up please record this data MOTOR AMPS MOTOR VOLTAGE PRESSURE TO INLET OFSAND FILTER PRESSURE AT OUTLET OFSAND FILTER BACKWASH DURATION ADDITIONAL OBSERVATIONS REMARKS Please complete this form and send a copy to LAKOS keep a copy for your records 1365 North Clovis Avenue Fresno...

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