USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
Page 3 of 8
TOP MOUNT VALVE SAND FILTERS
ISVL40 Rev D
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. 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 valve is locked into position in filter body.
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.
Your Hayward VL Series sand filter is a totally corrosion-
proof filter that blends superior flow characteristics and
features with ease of operation. 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 minimal
attention and care.
HOW IT WORKS
Your filter uses special filter sand to remove dirt particles
from pool 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 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 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.
INSTALLATION
Only simple tools (screwdriver and wrenches), plus TFE
tape for plastic adapters, are required to install and/or
service the filter.
1.
The filter system should be installed, 1 1/2 feet below
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 are accessible for
operation, service and winterizing.
2.
Assemble pump strainer basket to pump.
3.
Loading sand media. Filter sand media is loaded
through the top opening of the filter.
a.
Loosen flange clamp and remove Filter Control
Valve (if previously installed).
b.
Cap internal pipe with sand shield to prevent sand
from entering it. Be sure pipe is securely in place in
bottom underdrain hub.
c.
We recommend filling tank approximately 1/2 way
with water to provide a cushioning effect when the
filter sand is poured in. This helps protect the
underdrain from excessive shock.
d.
Carefully pour in correct amount and grade of filter
sand, as specified on Table 1. (Be sure center pipe
remains centered in opening). Remove sand shield
from internal pipe.
4. Assemble Filter Control Valve to filter tank.
a.
Loosely pre-assemble both halves of the clamp with
one screw and one nut, turning the nut 2 or 3 turns.
Do not tighten. Wipe filter flange clean.
b.
Insert Filter Control Valve (with valve/flange 0-ring
in place) into the tank neck, taking care that the
center pipe slips into the hole in the bottom of the
valve. Install clamp around tank and valve flange and
assemble second screw and nut. Tighten just
enough so that the valve may be rotated on tank for
final positioning.
c.
. Carefully screw pressure gauge, into 1/4"NPT
tapped hole in valve body. Make sure the o-ring is in
place. Do not over tighten.
d.
Connect pump to control valve opening marked IN
(See last Page of this Owner’s Guide for an
illustration.) After connections are made, tighten
valve flange clamp with screwdriver, tapping around
clamp with screwdriver handle to help seat valve
flange clamp.
5.
Make return to pool pipe connection to control valve
opening marked OUT and complete other necessary
plumbing connections, suction lines to pump, waste,
etc.
6. Make pump electrical connection to grounded, GFCI
protected, 110 VAC circuit.
