Jandy JS Series, Installation And Operation Manual

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Page 10
JS Series Sidemount Sand Filters
5. If used, pour pea gravel SLOWLY into the filter
first. Level the surface of the gravel, and then
pour in the appropriate amount of sand to the level
indicated in Table 2. If using sand only, pour it into
the filter SLOWLY to the level indicated in Table
2. Be careful not to dislodge the vent tubing from
its fitting in the piping while adding filter media.
Refer to Figure 10.
6a. For the JS60-SM: Swing the diffuser back so it is
centered with the lid hole in the tank top.
6b. For the JS100-SM: Remove the cardboard sand
deflector.
7. Wash away any sand or dirt particles in the threads
in the top of the tank.
8. Ensure diffuser(s) are upright and centered
properly.
WARNING
The automatic vent screen and tubing
must be positioned properly to avoid
trapping air inside the filter. Trapped air
can cause product failure or also cause
the filter lid to be blown off, which can
result in death, serious personal injury,
or property dam age.
Figure 11. Automatic Vent Positioning
9. Make sure that the automatic vent tubing is in
place (threaded through the diffuser) and the vent
screen is installed at the top of the vent tubing. See
Figure 11.
3.6 Use of Zeobrite
®
as an Alternative to
Sand
As an alternative filter media for use instead of
sand, Zeobrite has been qualified for use in Jandy JS
series filters.
1.
For filter sizes of 30" in diameter and greater, it is
recommended that a pea gravel bed be used before
adding the filter media. See Table 3 for the type
and amount of pea gravel to use. Ensure the top
surface of the pea gravel is flat before adding filter
media.
Using the correct pea gravel will ensure that the
filter media is evenly lifted during backwashing
cycles and settles evenly after backwashing to
optimize filter performance. The pea gravel will
cover the laterals to approximately 1" above the
laterals.
2. Fill the filter with Zeobrite to the level shown
in Table 3. The weight of the material shown is
approximate. See Figure 10 for the illustration of
“Freeboard”.
Table 3. Required Zeobrite Level
Model Freeboard
"F" inches
(cm)
Layered Media
Pea Gravel*
lbs (kg)
Zeobrite
lbs (kg)
JS60-SM 11 1/2" (29) 75 (34) 150 (68)
JS100-SM 11 1/4" (29) 175 (80) 270 (122)
* Pea Gravel is to be 1/8" to 1/4" in diameter.
3.7 Lid Installation
WARNING
Follow these instructions carefully.
Improper lid installation can cause
product failure or also cause the filter lid
to be blown off, which can result in death,
serious injury, or property damage.
WARNING
Never attempt to adjust or remove the
lid when the pump is running or there is
pressure in the system. This can cause
product failure or also cause the filter lid
to be blown off which can result in death,
serious personal injury, or property
damage.
1. Ensure that the lid seal is fully seated within the
groove in the flange of the lid.
Figure 10. Sand Level
Freeboard "F"
Sand or
Sand and Gravel
Lid/Top of Filter
Vent Screen
in Close Proximity
to Filter Lid
Diffuser
Venting Tubing
to Fitting in Piping