Zodiac Pool Systems Jandy JS100-SM Kit Instructions page 4

Page 4
Lower the hub and laterals assembly to rest on the
tank bottom, and turn the elbow away from the
bulkhead fittings to provide working room for the
next steps.
4. Thread the outlet pipe assembly (this is the
assembly with the longer piece of pipe with four
(4) holes drilled and a female adapter on the
opposite end) onto the inlet bulkhead fitting hand
tight only. Adjust the pipe so a screw hole is facing
up.
5. Prepare the wye subassembly. The diffuser pipe
subassemblies may be connected to the wye
subassembly before it is placed into the filter, or
afterwards. Use a hex head screw to attach the
diffuser pipe subassemblies to the wye. Insert the
assembly into the filter. Connect the wye to the
inlet pipe assembly, align the screw holes and
fasten in place using a hex head screw.
6. Connect the elbow of the hub pipe assembly to
the outlet pipe assembly, align the screw holes and
fasten in place using a hex head screw.
7. Thread the cable tie through the hole in the wye
plate, wrap it around the hub pipe and fasten it tight
around the pipe.
8. Install the air relief tubing and vent screen as
follows:
a. The body of the compression fitting connector
should be fastened firmly into the threaded hole
in the outlet pipe assembly. Loosen the threaded
cap on the connector about one (1) turn from the
tight position, but do not remove this cap from the
fitting.
b. Slide the tubing into the end of the cap until it
bottoms out. Tighten the end cap and check the
tubing. It should not pull out.
9. Screw the diffusers hand-tight onto the diffuser
pipes.
10. Complete the assembly of the air relief. Thread
the free end of the air relief tubing through the
diffuser (see Figure 7). Slide the vent screen with
its grommet onto the end of the tubing so that the
tubing is approximately 3/4 the distance into the
screen.
H. Refilling the Filter with Sand
Jandy high rate sand filters most commonly use
sand as a filter medium, or sand over a shallow layer of
pea gravel. If pea gravel is used, it will cover the laterals
to approximately 1" above the laterals. The use of filter
media other than sand is also described in Section I.
1. Sand density can vary depending on the sand and
how much moisture it is carrying. For this reason,
consider the sand weights given as approximation
only. Determine the actual amount of sand to add
based on freeboard dimension shown in Table 1.
Figure 7. Automatic Vent Positioning
Table 1. Required Sand Level
Model Freeboard
"F" inches
(cm)
JS100-SM 11 1/4" (31)
Notes: All media to be marked as meeting NSF
Sand Filters.
Sand is to be #20 Silica Sand (.016"-.021").
Pea Gravel, if used, is to be 1/8" to 1/4" diameter range.
2. Before adding any filter media, ensure the laterals
(spokes) are screwed firmly into the hub and that
the hub is centered in the tank with the laterals
(spokes) horizontal.
CAUTION
To avoid damaging the laterals (spokes), slowly add
the filter media until the laterals are fully covered.
Cracked or broken laterals (spokes) will cause sand
to be discharged to the pool.
3. Add water to approximately 4 inches above the
level of the laterals.
4. Place a plastic bag over each of the diffusers
to completely cover all of the holes. Keep the
diffusers covered until the addition of the filter
media is completed.
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 1. If using sand only, pour it into
the filter SLOWLY to the level indicated in Table
1. Be careful not to dislodge the vent tubing from
its fitting in the piping while adding filter media.
Refer to Figure 8.
6. Remove the plastic bags from the diffusers. Wash
away any sand or dirt particles in the threads in the
top of the tank.
7. Ensure diffuser(s) are upright and centered
properly.
Lid/Top of Filter
Vent Screen
in Close Proximity
to Filter Lid
Diffuser
Venting Tubing
to Fitting in Piping
Sand Only Layered Media
lbs (kg)
Pea Sand lbs
Gravel (kg)
lbs (kg)
600 (273) 175 (80) 425 (193)
requirements for
®