Zodiac Pool Systems Jandy JS100-SM Kit Instructions page 5

Figure 8. Sand Level
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 damage.
8. 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 7.
I. Use of Zeobrite
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 inches in diameter and
greater, it is recommended that a pea gravel bed
be used before adding the filter media. See Table
2 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 2. The weight of the material shown is
approximate. See Figure 8 for the illustration of
"Freeboard".
Freeboard "F"
Sand or
Sand and Gravel
as an Alternative to
®
Table 2. Required Zeobrite Level
Model Freeboard
"F" inches
(cm)
JS100-SM 11 1/4" (31)
* Pea Gravel is to be 1/8" to 1/4" in diameter.
J. Lid Installation
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.
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.
2. Before installing the lid, ensure that the air vent
screen at the top of the air vent tubing is properly
located above the diffuser such that it will be close
to the underside of the lid when the lid is installed.
See Figure 9.
Inspect the lid and tank for any damage before in-
stalling the lid. A damaged lid or tank could cause the
lid to be blown off which can result in death, serious
personal injury, or property damage.
3. Inspect the threads to make certain that they are
free of sand particles and wipe the threads on the
tank and lid clean of any sand or debris. Apply a
light coating of liquid dish washing detergent or
Air Release Valve
Lid Flange Fully
Seated Against Tank
Figure 9. Filter Lid Installation
Page 5
Layered Media
Pea Gravel* Zeobrite lbs
lbs (kg) (kg)
175 (80) 270 (122)
WARNING
WARNING
WARNING
Vent Hole
Air Vent
Screen