Raypak RPSFP18 - 4 Overview; Filter; Constant Speed Pump Models; Dual-Speed Pump Models

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4. OVERVIEW
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WARNING: Failure to operate your lter system,
or inadequate ltration, can cause poor water clarity
obstructing visibility in your pool. Poor water clarity may
obscure objects while swimming which, while swimming
and diving, could cause serious personal injury or death.
Never swim in a pool with poor water clarity.
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WARNING: This lter operates under high pressure.
When any part of the circulating system (e.g., clamp,
lter, valves, etc.) is serviced, air can enter the system
and become pressurized. Pressurized air can cause
the lid or control valve to separate which may result in
serious injury, death, or property damage. To avoid this
potential hazard, follow these instructions.
Before any service to the circulating system (repositioning
valves, beginning the assembly, disassembly, clamp
adjustment, etc.):
a. Turn off electricity going both to the pump
off and to any automatic controls to avoid
accidental system start-up during servicing;
b. Open manual air relief valve;
c. Wait until the pressure gauge reads zero (0) to
ensure all pressure is gone.
1. When, or if, installing the filter clamp, follow the filter
valve and clamp installation instructions exactly.
2. Follow the system restart instructions exactly after
service on the circulation system is complete.
3. Maintain circulation system proactively. Damaged
and worn parts must be replaced immediately (e.g.,
clamp, pressure gauge, relief valve, O-rings, etc.).
4. Mount the filter properly and position it according to
all provided instructions.
Filter
The sand lter is designed to last for years of use when
maintained properly. Its purpose is to extract suspended
particles (dirt) from the pool water to keep the water clear.
A special lter sand is used to trap and collect the particles.
The ltering action occurs as the water ows through the
unit, and the particles are trapped in the sand bed which
form the lter.
In terms of layout, water enters through a valve on the
top of the lter and then passes evenly though the lter.
The ltered water then exits through the bottom side of the
lter, up through the stand pipe, through a valve on the top,
and then back into the pool though piping or hoses.
In terms of capacity, please ensure the volume of water
cleaned in every 24-hour cycle is, at minimum, at least
double the total volume in the pool so proper cleaning can
occur.
After time, enough particles will have collected in the lter
sand to impede the easy ow of water though it and this
resistance will cause the lter pressure to build to such a
point that the lter needs cleaning (purging). That process
is called backwash.
The backwash procedure reverses the ow of water
through the lter to ush out the particles and discharge
them, not back into the pool, but into a waste line. A valve
on the unit top is set to BACKWASH. This is a manual
procedure. After running the BACKWASH cycle, reset the
value to FILTER manually to resume normal ltration.
The sand lter, while designed to remove particles and/or
other debris suspended in the water, does not adjust the
pH level or the bacterial count.
Sanitation and pH balancing are specialized and important
areas that are covered with other tools, equipment and
knowledge and as such are beyond the scope of the
manual. Roughly speaking, pH level should be in the range
of 7.2~7.6, and chlorine about 1~2 ppm, but much more
goes into water chemistry than this. Check the local codes
and with pool service specialists for required instruction.
Constant Speed Pump Models
This above-ground pool centrifugal pump is designed to
operate for years with proper maintenance. The pump
body, trap with basket, di󰀨user and impeller are made from
high quality thermoplastic materials. These materials are
made using corrosion-resistant materials. When installed,
operated and maintained in accordance with these
instructions, your pump will provide years of service.
These pumps are driven by an electric motor which is
directly attached to an impeller. When the electric motor
turns, the impeller turns too, moving water from the trap
inlet to the outlet for water circulation. The trap basket stops
debris from going into the pump to protect the impeller.
It has a transparent lid cover which can be opened for
cleaning out the trap.
Dual-Speed Pump Models
Some of the pumps feature both high-speed and low-
speed settings. At low speed, the pump runs at half of
the high speed rate and thus has a di󰀨erent performance
curve. In low-speed mode, the electrical energy savings
are 60%, based on an equal amount of circulated water.
Switch the motor to low speed for quiet operation and
electrical cost savings if circulation turnover time is not a
critical consideration. Expect that minor adjustments may
be required with the automatic chlorine dispenser, the
skimmers and the heater due to the lower ow. Refer to
the manual as necessary.
High-speed mode is ideal for vacuuming the pool, quick
ltering action, priming the system, and to keep up with
heavy bathing use.