Hayward HCF Serie Manual De Instalación Y Operación página 4

NOTICE – Each country (possibly each state) will have its own standards for public and private pools. It is the responsibility of the installer to be aware of
these codes before designing, specifying or installing any piece of equipment for a swimming pool.
Swimming Pool Filters
Filters are, without a doubt, the most important accessory used in the treatment of swim-
ming pool water. Their purpose is to eliminate suspended particles from the circulating
water, thus clarity of the water. The principle operation consists of passing the swimming
pool water through a bed of sand which will retain any particles that are suspended in
the water. It should be kept in mind that the filtration system consists of a number of
elements, such as metering equipment, pumps, pool shell fittings and pipe work, which
ensure the correct suction and return flows that will affect the resultant condition of the
treated water.
The quality of filtration depends on various factors, the size and shape of the sand, the
sand bed depth, characteristics of the sand such as granular size, density, etc. A most
important parameter is the water filtration rate. Other factors affecting the selection of
a filter are the materials used for its construction, the working temperature, and the
operating pressure.
Hayward filters are manufactured from proprietary resins and fiberglass, they are virtu-
®
ally corrosion-proof. The internal fittings (diffuser and lateral system) are manufactured
from PVC and ABS. They are unaffected by salt water and are manufactured for a work-
ing pressure up to 50 PSI and a maximum working temperature of 122° F.
Filter Characteristics
Choose the filter or filters that meet the local turnover time requirements. Remember it is possible to add filters together to obtain the correct amount of filtra-
tion area required. Note: when using multiple filters, they must be plumbed in parallel configuration. It is also a good idea to oversize the surface area required
by 10% or more, this will allow for better water quality. When possible, use more than one filter in conjunction, this will allow one filter to be serviced while
one is still functioning.
When sizing the plumbing for a filtration package be sure to keep in mind that the velocity of the water in the pipes is very important. Each country or state
may have different maximums for velocity in the plumbing. The recommendations of APSP-7 should be followed.
Installation Characteristics
To insure selection of the correct pump size, the required flow must be obtained by taking the system head into consideration. The system head is the added
difficulty to move water through the system presented by using, elbows, piping, tees, changes in elevation, etc. It is also recommended that the discharge
from each pump is brought together in a single manifold to the filters. This will allow for greater flow rates for the backwash cycle.
• Install a check valve ahead of filter inlet to prevent contaminants from draining back into the pool.
• Install a check valve between filter and heater to prevent hot water from backing up into filter and damaging internal components.
• Disposal of "waste water" must meet local, state and national codes.
• See Chart on page 4 for vertical and horizontal clearance.
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General
Hayward Recommended Minimum Filter Piping
Filter Model Port Size
HCF342C 3" Flange/Union
HCF348C 3" Flange/Union
HCF455C 4" Flange
HCF663C 6" Flange
USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
Inlet
Outlet
Drain
Minimum Pipe Size
3" Schedule 40
3" Schedule 40
4" Schedule 40
6" Schedule 40