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ENGLISH
Jandy
®
Commercial Horizontal Sand Filter | Installation & Operation Manual
Section 4. Start-Up and Operation
Before operating the filter, inspect internals for any
freight damage. Damaged laterals may result in
media being discharged out of the tank. Damage to
access hatch gasket may result in water leakage.
Proper care should be taken to not damage the tank
internal components and access hatch gasket.
4.1 Install Media
WARNING
To avoid an electrical shock hazard, which can result in serious injury
or death, ensure that all electrical power to the system is turned off
before approaching, inspecting or troubleshooting any leaking valves
or plumbing that may have caused other electrical devices in the
surrounding area to get wet.
WARNING
Follow all filter manufacturer's instructions. NEVER
attempt to assemble, disassemble or adjust the filter
when there is pressurized air in the system. Starting the
pump while there is any pressurized air in the system can cause the
filter lid to be blown off, which may cause death, serious personal
injury or property damage.
CAUTION
If required by site or specification, pressure testing should be
completed before the filters are loaded with sand.
4.1.1 Media Requirements
• Filter systems can be used with one (1) single
grade of # 20 silica sand or with Zeolite. Zeolite
must be installed with a ¼” x 1/8” washed gravel
under bed.
• Refer to the ordering guide for each model of filter
for the correct amount of filter media and gravel
under bed.
• Filter media depth should be as indicated on the
drawings.
• Measurements should be taken at the site and
from the centerline of the laterals to the top of
the media.
• Silica filter media should be a carefully selected
grade of hard, uniformly graded silica with a
minimum combined mean percent of silica by
weight of 90%
• Must be free of limestone or clay.
• Media should be angularly shaped particles of
silica with a particle size between .45 mm and
.55 mm with a roundness value between 0.0 mm
and 0.15 mm.
• Round or sub-rounded particle shapes are not
acceptable as suitable media.
• Uniformity coefficient shall not exceed 1.50 mm.
• The specific gravity of the media should not be
less than 2.5 with a minimum hardness of 7 mohs.
4.1.2 Fill the Tank with Media
1. Fill the filter tank with water to a level at least
above the laterals.
• This will protect the under drain lateral
system from excessive strain when the media
is loaded.
2. Cover the diffuser assemblies near the access
opening to prevent plugging with media during
the loading process.
3. Rest a media bag in the access opening of the
filter tank with one end cut open.
4. Pour the media into the tank.
5. Use a push stick as the media piles inside the
tank.
6. Push as much as possible towards the back.
7. After the initial backwash, the filter media should
be level and at the distance from the top of the
diverter assembly(s).
NOTE:
Take care to not damage the laterals, diffusers,
internal vent assembly or drain assembly.
4.2 Check Freeboard
1. Leave enough space ("freeboard") on the
surface top of the media bed to the top of the
diffuser assembly.
2. Follow the following measurements (A) in
accordance to the model series.
