Page 4 of 8 MODEL S310S IS310S Rev B
WWW.HAYWARDPOOL.COM USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
g. Wipe filter flange clean.
h. Insert top closure dome (with flange 0-ring in place)
into the tank neck. Place clamp around dome flange
and tank flange and tighten with screwdriver, tapping
around clamp with screwdriver handle to help seat
flange clamp. Do not overtighten.
5. Connect pump to control valve opening marked PUMP
according to instructions. Make return to pool pipe
connection to control valve opening marked RETURN and
complete other necessary plumbing connections, suction
lines to pump, waste, etc.
6. Make electrical connections to pump per pump instructions.
7. To prevent water leakage, be sure drain cap is securely in
place and all pipe connections are tight.
INITIAL START-UP OF FILTER
1. Be sure correct amount of filter sand media is in tank and
that all connections have been made and are secure.
IMPORTANT: To prevent unnecessary strain on piping
system and valving, always shut off pump before
switching Filter Control Valve positions.
2. Depress Vari-Flo control valve handle and
rotate to BACKWASH* position. (To prevent
damage to control valve seat, always depress
handle before turning.)
3. Prime and start pump according to pump
instructions. (be sure all suction and return lines
are open), allowing the filter tank to fill with water.
WARNING –All suction and discharge
valves must be open when starting the system.
Failure to do so could cause severe personal
injury and/or property damage.
4. Once water flow is steady out the waste line, run the pump
for at least 2 minutes. This initial backwashing of the filter is
recommended to remove any impurities or fine sand
particles in the sand media.
5. Turn pump off and set valve to RINSE position. Start
pump and operate until water in sight glass is clear—about
1/2 to 1 minute. Turn pump off, set valve to FILTER
position and restart pump. Your filter is now operating in
the normal filter mode, filtering particles from the pool
water.
6. Adjust pool suction and return valves to achieve desired
flow. Check system and filter for water leaks and tighten
connections, bolts, nuts, as required.
7. Note the initial pressure gauge reading when the filter is
clean. (It will vary from pool to pool depending upon the
pump and general piping system.) As the filter removes dirt
and impurities from the pool water, the accumulation in the
filter will cause the pressure to rise and flow to diminish.
When the pressure gauge reading is 6-8 PSI (0.41-0.55
BAR) higher than the initial "clean" pressure you noted, it is
time to backwash (clean) the filter (see BACKWASH under
Filter Control Valve Functions).
NOTE: During initial clean-up of the pool water it may be
necessary to backwash frequently due to the unusually
heavy initial dirt load in the water.
To prevent damage to the pump and filter and for proper
operation of the system, clean pump strainer and skimmer
baskets regularly.
FILTER CONTROL VALVE FUNCTIONS
FILTER—Set valve to FILTER for normal filtering. Also use for
regular vacuuming.
BACKWASH—For cleaning filter. When filter pressure gauge
rises 8-10PSI (0.55-0.69 BAR) above start-up (clean pressure):
Stop the pump, set valve to BACKWASH. Start pump and
backwash approximately 2 minutes or less depending on dirt
accumulation until water in sight glass is clear. Proceed to
RINSE.
RINSE—After backwashing, with pump off, set valve to RINSE.
Start pump and operate for about 1/2 to 1 minute. This ensures
that all dirty water from backwashing is rinsed out to the filter to
waste, preventing possible return to the pool. Stop pump, set
valve to FILTER, and start pump for normal filtering.
WASTE—To bypass filter for draining or lowering water level
and for vacuuming heavy debris directly to waste.
RECIRCULATE—Water is recirculated through the pool
system, bypassing the filter.
CLOSED—Shuts off flow from pump to filter.
VACUUMING—Vacuuming can be performed directly into the
filter. When vacuuming heavy debris loads, set valve to
WASTE position to bypass the filter and vacuum directly out to
waste.
WINTERIZING
1. Completely drain tank by unscrewing drain cap at base of
filter tank. Leave cap off during winter.
2. Depress Vari-Flo control valve handle and rotate so as to set
pointer on valve top between any two positions. This will allow
water to drain from the valve. Leave valve in this "inactive"
position.
3. Drain and winterize pump according to pump instructions.
SERVICE & REPAIRS
Consult your local authorized Hayward dealer or service center.
No returns may be made directly to the factory without the
expressed authorization of Hayward Pool Products, Inc.
PLEASE REALIZE:
Pure, clear swimming pool water is a combination of two
factors—adequate filtration and proper water chemistry
balance. One without the other will not give the clean
water you desire.
Your filter system is designed for continuous operation.
However, this is not necessary for most swimming pools.
You can determine your filter operation schedule based
on your pool size and usage. Be sure to operate your
filtration system long enough each day to obtain at least
one complete turnover of your pool water.
To properly sanitize your pool, maintain a free chlorine
level of 1 to 3 ppm and a pH range of 7.2 to 7.6.
Insufficient chlorine or an out of balance pH level will
permit algae and bacteria to grow in your pool and make
it difficult for your filter to properly clean the pool water.
*NOTE: For new concrete or gunite pools, or where there is a large amount of
plaster dust or debris—start filter in FILTER position (not BACKWASH) to
prevent clogging of underdrain laterals.
