Pentair Sand Dollar SD40 Guide D'installation Et D'utilisation page 7

Section 1
Pump and Sand Filter System Overview
This system operates under pressure and if assembled improperly or operated
with air in the water circulation system it can separate and result in an
accident causing serious bodily injury. A warning label has been affixed to the
filter and should not be removed. Keep safety labels in good condition and
replace if missing or illegible. (For free labels call, (919)-774-4151). Pumps
and filters should never be tested or subjected to air or gas under pressure.
All gases are compressible and under pressure create a danger. Serious
bodily injury or property damage could occur if the pump or filter is subjected
to air or gas pressure.
The system consists primarily of a centrifugal pump, a high rate sand filter
with control valve, a connecting hose and a mounting base. Your centrifugal
pump is driven by an electric motor. The motor is directly attached to the
pump impeller. As the electric motor turns it causes the impeller to turn and
this causes the water to flow. The water flows into the hair and lint pot inlet
and through the basket assembly to prestrain large particles. The flow then
enters the center of the pump housing. The flow goes through the impeller
into the stationary diffuser, out the pump discharge port, through the
connecting hose and into the filter control valve. Dirt is collected in the filter
as the water flows through the control valve at the top of the filter and is
directed downward onto the top surface of the filter sand bed. The dirt is
collected in the sand bed and the clean water flows through the lower piping
at the bottom of the filter up through the center pipe into the control valve at
the top of the filter. Clean water then returns through the piping system to the
pool. The pressure will rise and the flow to the pool will be lowered as the dirt
is collected in the filter. Eventually, the filter will become so plugged with dirt
that it will be necessary to perform the backwash procedure. It is important to
know when to backwash the filter. For backwashing information, see page 12
and 13. The six (6) operating position and one (1) "Winterize" position valve is
designed to provide all the necessary positions required to operate, maintain,
troubleshoot and service your sand filter.
Air entering the filter and a valve clamp not closed
properly can cause the valve to separate and could
cause serious bodily injury and/or property damage.
To prevent equipment damage and possible injury,
always turn pump off before changing valve position.
Pump and Sand Filter System Installation and User's Guide
1