Service And Maintenance; Troubleshooting - Pentair STA-RITE SILENTFLO SF550100 Owner's Manual

SERVICE & MAINTENANCE
To avoid dangerous or fatal electrical shock hazard, turn OFF power
to motor and remove plug from power outlet before working on
pump or motor.
Routine Maintenance requires regular checking of the pump to ensure no water is
leaking from joints whilst pump is operating and inspection/cleaning of trap basket.
Debris or trash that collects in basket will choke off water flow through the pump.
Do not operate pump with trap basket missing or damaged.
Follow instructions below to clean trap:
1. Switch off power to pump, close valves in suction and discharge, and release all
pressure from system before proceeding.
2. Remove trap cover (turn clockwise). If necessary, tap handles gently with a rubber
mallet or use a board as a lever.
3. Remove strainer basket and clean. Ensure all holes in basket are clear, flush basket
with water and replace in trap with large opening at pipe connection port (between
ribs provided). If basket is replaced backwards, the cover will not fit on trap body.
To clean tranparent cover, use water and neutral soap only. Do not use solvents.
4. Clean and inspect lid o-ring; reinstall on trap.
5. Clean O'ring groove on trap body and replace cover. To help keep cover from
sticking, tighten hand tight only.
6. Prime pump (refer priming instructions).
Pump Service
Pump should only be serviced by qualified personel. For best results, use only genuine
ONGA service parts. Be sure to prime pump before starting.
Before removing clamp or trap cover:
1. SWITCH OFF POWER to pump before proceeding.
2. CLOSE SHUT-OFF VALVES in suction and discharge pipes.
3. RELEASE ALL PRESSURE from pump and piping system.
4. NEVER tighten or loosen covers, valves, nuts or bolts while pump is operating!
14 SILENTFLO ™ Pool Pump Owner' s Manual
No lubrication or regular maintenance is needed beyond reasonable care and periodic
cleaning of strainer basket. When pump is not in use and there is a risk of frost, empty
it completely through the drain plug. If shaft seal is worn or damaged consult your
Pentair Water authorised service agent.
Symptom
Suction leaks / lost prime.
Low water pressure, low flow
from pump.
Low voltage.
Clogged pipe / strainer /
impeller / filter system.

TROUBLESHOOTING

Cause Remedy
Pump must be primed; make
sure that the pump casing and
strainer are full of water.
Refer priming instructions.
Make sure there are no leaks in
suction piping.
Make sure suctions pipe inlet
is well below the water level to
prevent pump from sucking air.
Suction lift of 3 to 6 metres
will reduce performance.
Suction lift of more than 6
metres will prevent pumping
and cause pump to lose prime.
In either instance, move the
pump closer (vertically) to
water source. Ensure that the
suction pipe diameter is
large enough.
Check voltage at motor
terminals and at meter while
pump is running - this check
should be performed by a
qualified electrician only.
If voltage is low check for loose
connections or consult your
power company.
Ensure trap is not clogged with
debris; clean basket
and/or filter.
SILENTFLO™ Pool Pump Owner' s Manual 15