Jandy JS Series, Installation And Operation Manual

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Page 9
JS Series Sidemount Sand Filters
CAUTION
Be sure that all provisions for wastewater disposal
meet local, state or national codes. During any
backwashing or draining process, 100 gallons or
more of pool water will be discharged. Do not
discharge water where it will cause flooding or
damage.
3.5 Filling 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 3.6.
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 Table 2.
Table 2. Required Sand Level
Model Freeboard
"F" inches
(cm)
Sand
Only
lbs (kg)
Layered Media*
Pea
Gravel
lbs (kg)
Sand
lbs (kg)
JS60-SM 11 1/2" (29) 300 (136) 75 (34) 225 (102)
JS100-SM 11 1/4" (29) 600 (273) 175 (80) 425 (193)
Notes: All media to be marked as meeting NSF
®
requirements for
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" above the level of
the laterals.
4a. For the JS60-SM: Taking care not to dislodge the
vent tubing and vent screen, swing the diffuser
over to the inside of the tank to keep filter media
out of the diffuser while filling.
4b. For the JS100-SM: A corrugated cardboard sand
deflector is provided to keep sand or gravel out
of the diffusers when adding the filter media. The
sand deflector is provided in a flat form. To use
it, roll the cardboard up tightly to make a circular
tube and insert the tabs into the slots. Place it
inside the threaded top hole of the filter such that
the pop out tabs keep it in place until the addition
of filter media is completed.
Figure 7. Water Drain Cap
Hold fitting when
removing or
installing drain cap
1 1/2” NPT Water
Drain Cap
Figure 8. Sand Flushing Fitting
Flush Out Sand
Through Large Fitting
Unscrew
Universal
Coupling Nut
Drain Screen
O-Ring
Figure 9. Universal Tailpiece Connections
Large Fitting
For Sand Flushing
O-Ring
Univeral Tailpiece (Not Included)
Universal
Coupling Nut
Short Piping to Direct
Flushed Sand Away
From Filter Base