Pentair PR AQUA ROTOFILTER Installation And Operation Manual page 17

SECTION 5: PRE-INSTALLATION
5.6.2 Electrical Supply
The electrical supply requirements depend on the
pump supplied with the Rotofilter. The separate
pump manual will identify the supply requirements.
The backwash system electrical supply should be
diagrammed prior to filter installation.
All electrical work should
be performed by a
qualified electrician.
All dimensions and locations should be checked
for accuracy and changes should be made if any
part of the backwash system will interfere with the
service clearance required by the Rotofilter.
5.6.3 Pump Location
The pump should be anchored near the Rotofilter.
The pump can be placed above the filter, but a foot
valve (not included) may need to be installed to
prevent loss of prime due to back flow.
The pump location should allow for the pump to be
securely attached, allow ample room for plumbing
and electrical fixtures, and should not interfere with
the service clearance required by the Rotofilter.
5.6.4 Proper Plumbing
The backwash system is shipped with fittings,
gauges, and valves. Plumbing fixtures are
not included.
The backwash system plumbing should be
diagrammed prior to filter installation. All plumbing
dimensions and locations should be checked for
accuracy and changes should be made if any part
of the backwash system will interfere with the
service clearance required by the Rotofilter.
If the backwash plumbing or pump will be
outside or partially outside, it must be insulated
to prevent freezing.
Figure 8. 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)
A pressure gauge, throttling valve, and solenoid
valve (if required) will need to be connected to
the spray bar. This assembly can be connected
on either end of the spray bar. A solenoid valve is
required where the supply water is pressurized or
where the pump is located above the water supply
or discharge level.
The pressure assembly should be connected at the
Rotofilter. See Figure 8.
The water supply should be connected to the
inlet of the pump. For Frame (RFF) models, the
pump inlet should be connected to a supply that is
completely submerged in the sump.
PR Aqua Rotofilter™ Drum Filter Installation and Operation Manual
17