Installing The Backwash System - Pentair PR AQUA ROTOFILTER Installation And Operation Manual

SECTION 6: INSTALLATION

6.3 Installing the Backwash System

The backwash system is shipped in 2 separate
packages. The first package contains all required
fittings, gauges, and valves. The second package
contains the booster pump.
Backwash system installations will vary based on
the locations and plumbing diagrammed in Section
5.6. However, all assemblies should follow the
guidelines below.
All threaded connections should
NOTE
be wrapped with plumbing tape or
food-grade thread sealant prior to
installation.
1. Ensure the throttling valve is fully closed before
you assemble the system.
2. Assemble the pressure gauge, connection point,
throttling valve, and solenoid (if required). See
Figure 10.
Figure 10. General backwash system assembly
1: Pressure Gauge
2: Connection Point (to Spray Bar Assembly)
3: Throttling Valve
4: Solenoid (if Required)
5: Outlet Plumbing (Pump to Unit)
6: Backwash Pump
7: Inlet Plumbing (Source to Pump)
8: Connection Point (to Source)
3. Once assembled, the connection point can be
installed on either side of the spray bar. See
Figure 11.
4. Do not over-tighten threaded connectors when
the female connection is PVC.
Figure 11. Spray bar connection
(connect to either end)
5. Anchor the booster pump to its location using
appropriate hardware.
6. Connect the pressure assembly to the outlet end
of the pump. If the pump is located above the
Rotofilter, a foot valve will need to be installed if
the water source is not pressurized.
7. Connect the water supply to the pump inlet. If the
water is supplied from the Rotofilter, the pump
inlet should be placed at the lowest level possible
to prevent loss of prime. In Frame (RFF) models
this would be the lowest area of the sump.
8. Make all electrical connections after the
backwash system has been installed.
Electrical work should be
performed by a licensed
professional electrician.
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