Fill The Filter - Jandy SFSM60 Installation And Operation Manual

Page 8
ENGLISH
could result. Sometimes equipment isolation valves
are required for installations where the filter and other
equipment are below the pool water level. Check valves
should be used to allow for equipment maintenance
without draining down the pool. If the application calls
for positive or manual shutoff valves, any shutoff valves
are to be prominently labeled "Warning: Explosive
Hazard. Do Not Run System With Valve Closed."
In addition, the use of isolation valves could cause a no
flow condition at other equipment. Running any equipment
with no flow could seriously damage the equipment.
Chemical feeders and/or chlorine generators should be
installed downstream of both the filter and the heater
and a check valve should be installed to prevent treated
3.2.1 PLUMBinG ConneCTionS
1. Place the filter on the concrete pad, lined up with the inlet/
outlet pipes. See Figure 3
• To reduce the loss of pressure, it is recommended to use a
pipe equal to or greater than the diameter of the outlets, for
the installation of the system.
2. Install the backwash valve.
• Connect the inlet and outlet plumbing to the valve as
detailed in the valve manual.
• For best efficiency use the fewest possible number of
fittings. This will prevent a restriction in the water flow.
• Make all plumbing connections in accordance with local
plumbing and building codes.

3.3 FiLL THe FiLTeR

Jandy high rate sand filters most commonly use sand
as a filter medium, or sand over a shallow layer of pea
gravel. See Figure 2 . The use of filter media other than
sand is also described in Section 3.3.1.
1. Sand density can vary depending on the sand and how much
moisture it is carrying. For this reason, consider the sand
weights given in Table 1 as approximation only. The free
board distance is the most important variable and should be
maintained.
• If pea gravel is used, it will cover the laterals to
approximately 1" above the laterals. See Figure 2.
• 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.
• 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. Check
for any broken laterals (spokes) which may have been
accidentally damaged by rough handling during shipment.
Replace any broken parts if necessary.
2. Fill the filter halfway with water before loading the filter
media. See Figure 2 .
3. Cover each of the diffusers with a plastic bag.
• Care must be taken so that filter media does not
get into the diffusers.
• Take care not to dislodge the vent tubing and vent screen.
See Figure 7 .
.
requirements for
®
Jandy Sand Filter SFSM
®
water from back flowing from the chlorine generators
or chemical feeders.
CAUTION
Operating at high vacuum levels can cause the tank
vessel to crack and leak with the potential for property
damage.
Backwash (waste) piping that discharges water at an
elevation of 10 ft. or lower than the water surface of
the pool should be equipped with a vacuum-breaker in
the waste piping within 10 ft. in vertical drop from the
elevation of the pool surface.
• Filter connections are provided with an O-ring seal. To avoid
damage to the O-rings, use only a silicone base lubricant on
the O-rings.
• DO NOT USE pipe joint compound, glue or solvent on union
coupling nuts.
• Do not use Teflon tape or pipe dope on any unions.
®
• Keep piping tight and free of leaks. Pump suction line leaks
may cause air to be entrapped in filter tank or loss of prime
at the pump.
• Support the inlet/outlet pipes independently to prevent any
undue strains on the backwash valve.
Freeboard "F"
(Manual to NSF)
12.4"
SFSM60
31.5 cm"
SFSM100
15"
SFSM100F
38.1 cm"
SFSM120
13.5"
SFSM120F
34.3 cm
SFSM140
16.0"
SFSM140F
40.6 cm
Table 1. Required Sand Level
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.
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Installation & Operation Manual
Layered Media
Sand
Pea
Only
Sand
Gravel
376 lbs 58 lbs 318 lbs
171 kg" 27 kg" 144 kg"
679 lbs 120 lbs 558 lbs
308 kg" 55 kg" 253 kg"
1166 lbs 163 lbs 1003 lbs
529 kg 74 kg 455 kg
1256 lbs 173 lbs 1083 lbs
570 kg 78 kg 491 kg