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Vacuuming pool (Figure 5):
valve and check valve if skimmer has them). Plug equalizer inlet.
Replace basket and place vacuum plate on top of basket. Fill the
vacuum hose with water, bring it in over coping or through skimmer
throat, and attach the vacuum hose directly to the vacuum plate.
Follow instructions in vacuum attachment or filter owner's manual
for vacuuming operation. After vacuuming, remove hose and
vacuum plate, unplug equalizer port, and reinstall check valve, float,
basket, and cover. Be sure cover is solidly in the frame to prevent
accidentally dislodging it. Fasten cover with screws provided if
children use pool.
Check Valve (Public Pool Models):
into equalizer inlet port in skimmer. When closed, check valve
prevents flow through equalizer line. If flow through skimmer
decreases enough to let float valve drop, check valve opens to
allow flow to pump from main drain/equalizer line (which prevents
starving the pump). Use Pentair Check Valve P/N 506162.
Inspect equalizer regularly. During normal operation (with float
valve open) the skimmer check valve prevents detectable flow
through the equalizer wall fitting. There should be no flow through
the wall fitting unless the skimmer float valve is closed. If you can
feel suction into the equalizer wall fitting while the float valve is in
normal (or up) position, the check valve is leaking; replace it.
NOTICE: The skimmer check valve is factory pre-set and not
adjustable. If check valve appears worn or deteriorated, or if spring
tension is loose, do not try to fix it; replace the check valve.
Equalizer: If flow over weir is restricted, Float valve closes, diverting
pump suction to equalizer (or main drain) line and preventing loss
of prime in pump. Seal normally remains until pump stops, when
float valve will rise. If pump starts again before stoppage is cleared,
float will close again and remain closed until pump stops, blockage
is cleared, or pool water level returns to normal.
Hazardous Suction: Risk of hair or body entrapment, drowning
or disembowelment. Wall fitting on equalizer line must be
non-entrapping of hair or body and must conform to ANSI/ASME
A112.19.8 requirements. A check valve is required when
skimmer is installed with equalizer. Check valve is not used
when skimmer is installed without equalizer.
Plug
Equalizer
Port
Figure 4: Typical residential
installation without float valve.
Use with at least two main drains.
Admiral
™
S-20 Automatic Skimmer Installation Guide
Remove cover, basket (and float
Check valve is threaded
From
Skimmer
Adjust Shut-off
Valves to
Balance Flow
NOTICE: The equalizer is an emergency bypass intended to
prevent damage to the pump when pool water level is low or
skimmer basket is blocked. Do not allow flow through equalizer for
extended time periods.
Equalizer:
If flow over weir is restricted, Float valve closes,
diverting pump suction to equalizer (or main drain) line and
preventing loss of prime in pump. Seal normally remains until pump
stops, when float valve will rise. If pump starts again before
stoppage is cleared, float will close again and remain closed until
pump stops, blockage is cleared, or pool water level returns to
normal.
MAINTENANCE
Weir:
Periodically check weir for free operation. Replace if
damaged or worn.
Strainer Basket: Check strainer basket every few days for
accumulated leaves, debris, etc. Empty basket as required. Reset
float valve if it closed.
Float Valve: Periodically check that float valve is operating freely
and is not waterlogged. For residential pools: If necessary, tighten
trimmer plate pivot screw to maintain desired flow balance.
Check Valve (Public Pool Models): Inspect for wear or
deterioration. Make sure that screw is tight in check valve body. If
you can detect flow through equalizer with float valve open, replace
check valve.
Equalizer (Wall) Fittings: Periodically check that wall fittings are
correctly installed and that covers are tight to fittings.
Water Level: Maintain water level at least 1½ inch to 2 inch above
bottom of skimmer opening for proper operation. Adjust trimmer
plate if necessary. Make sure set screw is tight.
Winterizing: Drain pool until level is below skimmer inlet. Remove
cover, basket and float. Plug both bottom ports with standard
1½ inch or 2 inch pipe plugs. Cover skimmer to prevent rainwater or
snow accumulation. Falling and tripping hazard. Skimmer grate
may deteriorate with prolonged use. Cover must be flush with pool,
spa, or hot tub deck level. Skimmer is made of impact and weather
resistant materials, but extended use (5-7 years) may lead to
reduced strength. Regularly check condition of skimmer cover. Look
for cracks, chips, deterioration of plastic, etc. If any sign of damage
or deterioration is found.
At least 4
times Pipe
Diameter
To Pump
Suction
973 0694
From
Pool
Main
Drains
Adjust
Trimmer Plate
to Balance Flow
From
Pool
Main
Drains
Figure 5: Typical residential
installation with float valve.
Use with at least two main drains.
Float
Valve
To Pump
Suction
991 0694
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