HAYWARD S310S User Manual

IS310S
Rev B

OWNER’S MANUAL

INSTALLATION, OPERATION & PARTS

MODELS S310S

PRO™ SERIES HIGH RATE SAND FILTERS

Basic safety precautions should always be followed, including the following: Failure to follow instructions can cause severe
injury and/or death.

This is the safety-alert symbol. When you see this symbol on your equipment or in this manual, look for one of the

following signal words and be alert to the potential for personal injury.

WARNING warns about hazards that could cause serious personal injury, death or major property damage and if

ignored presents a potential hazard.

CAUTION warns about hazards that will or can cause minor or moderate personal injury and/or property damage

and if ignored presents a potential hazard. It can also make consumers aware of actions that are unpredictable and unsafe.

The NOTICE label indicates special instructions that are important but not related to hazards.

SAVE THIS INSTRUCTION MANUAL

Use only High Rate Sand No. 20 Silica Sand (.45mm - .55mm)

HAYWARD POOL PRODUCTS, INC.

620 Division Street Elizabeth, NJ 07207 Tel: [phone]

WWW.HAYWARDPOOL.COM

Page 2 of 8 MODEL S310S IS310S Rev B

- WARNING - Read and follow all instructions in this owner’s manual and on the equipment. Failure to follow

near point to near point.
o Dual suction fittings shall be placed in such locations and distances to avoid “dual blockage” by a user.
o Dual suction fittings shall not be located on seating areas or on the backrest for such seating areas.
o The maximum system flow rate shall not exceed the flow rating of as listed on Table 2.
o Never use Pool or Spa if any suction outlet component is damaged, broken, cracked, missing, or not securely attached.
o Replace damaged, broken, cracked, missing, or not securely attached suction outlet components immediately.
o In addition two or more suction outlets per pump installed in accordance with latest NSPI, IAF Standards and CPSC guidelines, follow all National,

State, and Local codes applicable.
o Installation of a vacuum release or vent system, which relieves entrapping suction, is recommended.

instructions can cause severe injury and/or death.

WARNING – Suction Entrapment Hazard.

Suction in suction outlets and/or suction outlet covers which are, damaged, broken, cracked, missing, or unsecured can cause severe injury
and/or death due to the following entrapment hazards:

Hair Entrapment- Hair can become entangled in suction outlet cover.

Limb Entrapment- A limb inserted into an opening of a suction outlet sump or suction outlet cover that is damaged, broken, cracked,

missing, or not securely attached can result in a mechanical bind or swelling of the limb.

Body Suction Entrapment- A negative pressure applied to a large portion of the body or limbs can result in an entrapment.

Evisceration/ Disembowelment - A negative pressure applied directly to the intestines through an unprotected suction outlet sump or suction

outlet cover which is, damaged, broken, cracked, missing, or unsecured can result in evisceration/ disembowelment.

Mechanical Entrapment- There is potential for jewelry, swimsuit, hair decorations, finger, toe or knuckle to be caught in an opening of a
suction outlet cover resulting in mechanical entrapment.

WARNING - To Reduce the risk of Entrapment Hazards:

o When outlets are small enough to be blocked by a person, a minimum of two functioning suction outlets per pump must be installed.

Suction outlets in the same plane (i.e. floor or wall), must be installed a minimum of three feet (3’) [1 meter] apart, as measured from

WARNING – Failure to remove pressure test plugs and/or plugs used in winterization of the pool/spa from the suction

outlets can result in an increase potential for suction entrapment as described above.

WARNING – Failure to keep suction outlet components clear of debris, such as leaves, dirt, hair, paper and other material

can result in an increase potential for suction entrapment as described above.

WARNING – Suction outlet components have a finite life, the cover/grate should be inspected frequently and replaced at

least every ten years or if found to be damaged, broken, cracked, missing, or not securely attached.

CAUTION – Components such as the filtration system, pumps and heater must be positioned so as to prevent their being

used as means of access to the pool by young children.

WARNING – Never operate or test the circulation system at more than 40 PSI.
CAUTION – All electrical wiring MUST be performed by a qualified professional, and MUST conform to local codes and

regulations.

WARNING – Never change the filter control valve position while the pump is running.

circulation system, all system and pump controls must be in off position and filter manual air relief valve must be in open position. Before starting
system pump, all system valves must be set in a position to allow system water to return back to the pool. Do not change filter control valve position
while system pump is running. Before starting system pump, fully open filter manual air relief valve. Do not close filter manual air relief valve until a
steady stream of water (not air or air and water) is discharged.

WARNING – Hazardous Pressure. Pool and spa water circulation systems operate under hazardous pressure during start

up, normal operation, and after pump shut off. Stand clear of circulation system equipment during pump start up. Failure to follow
safety and operation instructions could result in violent separation of the pump housing and cover, and/or filter housing and clamp due to
pressure in the system, which could cause property damage, severe personal injury, or death. Before servicing pool and spa water

WARNING – Separation Hazard. Failure to follow safety and operation instructions could result in violent separation of pump

and/or filter components. Strainer cover must be properly secured to pump housing with strainer cover lock ring. Before servicing pool and
spa circulation system, the filter’s manual air relief valve must be in open position. Do not operate pool and spa circulation system if a
system component is not assembled properly, damaged, or missing. Do not operate pool and spa circulation system unless filter manual air
relief valve body is in locked position in filter upper body.

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Page 3 of 8 MODEL S310S IS310S Rev B

WARNING – Electrical Ground motor before connecting to electrical power supply. Failure to ground pump motor can cause

serious or fatal electrical shock hazard.

WARNING – Do NOT ground to a gas supply line.

WARNING – To avoid dangerous or fatal electrical shock, turn OFF power to motor before working on electrical connections.

WARNING – Failure to bond pump to pool structure will increase risk for electrocution and could result in injury or death. To reduce the risk

of electric shock, see installation instructions and consult a professional electrician on how to bond pump. Also, contact a licensed electrician for
information on local electrical codes for bonding requirements.

Your Hayward Pro Series high-rate sand filter is a high
performance, totally corrosion-proof filter that blends superior
flow characteristics and features with ease of operation. It
represents the very latest in high-rate sand filter technology.
It is virtually foolproof in design and operation and when
installed, operated and maintained according to instructions,
your filter will produce clear, sparkling water with only the
least attention and care.

HOW IT WORKS

Your filter uses special filter sand to remove dirt particles
from the water. Filter sand is loaded into the filter tank and
functions as the permanent dirt removing media. The pool
water, which contains suspended dirt particles, is pumped
through your piping system and is automatically directed by
the patented filter control valve to the top of the filter tank. As
the pool water is pumped through the filter sand, dirt particles
are trapped by the sand bed, and filtered out. The cleaned
pool water is returned from the bottom of the filter tank,
through the control valve and back to the pool through the
piping system. This entire sequence is continuous and
automatic and provides for total recirculation of pool water
through your filter and piping system.

After a period of time, the accumulated dirt in the filter causes
a resistance to flow, and the flow diminishes. This means it is
time to clean (backwash) your filter. With the control valve in
the backwash position, the water flow is automatically
reversed through the filter so that it is directed to the bottom
of the tank, up through the sand, flushing the previously
trapped dirt and debris out the waste line. Once the filter is
backwashed (cleaned) of dirt, the control valve is manually
resequenced to Rinse, and then Filter, to resume normal
filtering.

openings in the side of the filter tank and press in
firmly. Secure the assembly to the tank connections
with the two bulkhead locknuts.

Do not overtighten.

3. Assemble pump and pump mounting base (if supplied) to
the filter according to instructions packed with the base.

4. Loading sand media. Filter sand media is loaded through the
top opening of the filter.

a. Remove the top diffuser from the internal diffuser

elbow pipe and place flexible, automatic air relief tube
to the side, out of the way, inside the tank.

b. Cap the internal diffuser elbow pipe with the sand

shield provided to prevent sand from entering it.

c. It is good practice to fill tank approximately 1/2 way

with water to provide a cushioning effect when the filter
sand is poured in. This helps protect the under-drain
laterals from excessive shock. (Be sure the drain cap
is securely in place on drain pipe.)

Note: Check to confirm all laterals are in the down

position before loading with sand. (See Figure A on
Page 5.)

d. Carefully pour in correct amount and grade of filter

e. Remove the sand shield from internal diffuser elbow

f. Replace diffuser on internal diffuser elbow pipe,

sand, as specified. Sand surface should be leveled and
should come to about 6 “ from the top of the filter tank.
Use no more than the recommended amount of sand.

pipe.

positioning automatic air relief tube through the hole
provided in the diffuser.

INSTALLATION

Only simple tools (screwdriver and wrenches), plus
Teflon tape manufactured for plastic adapters, are
required to install and/or service the filter.

1. The filter system should be installed, not more than
6 feet

above pool water level, on a level concrete
slab, very firm ground, or equivalent, as
recommended by your pool dealer. Position the filter
so that the piping connections, control valve and
winter drain are convenient and accessible for
operation, service and winterizing. Assemble Vari­Flo filter control valve to filter. Align the two (2) valve
pipe connections, with 0-rings in place, with the two

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