Pentair ONGA 112 Series User manual

1
112/252, 14, 18 SERIES
HI-FLO CENTRIFUGAL PUMPS
High flow water transfer. Suitable for tank filling
& irrigation.
OWNER`S MANUAL
Should the installer or owner be unfamiliar with the
correct installation
or operation
of this type of
equipment,
contact the distributor
or manufacturer
for correct
advice before proceeding
with installation
or operation of the product
®
ONGA
Distributed in NZ By:
Freephone 0508 634 341
7 Monier Pl, Mt Wellington, Auckland
1060, New Zealand

2
RELAX - YOU’ VE BOUGHT AN ONGA...
1. Continual Product Improvement
We employ the best engineers both in Australia and
around the world to develop new and better ways to
take water further.
2. Operational Excellence
There is only one standard that we set ourselves for both
product quality and the quality of our service. That
standard is excellence... to have no-one better than us
at what we do... nothing short of that is acceptable.
3. A Fair Price
Onga products are neither the cheapest nor the most
expensive in their field. Our products do, on the other
hand, always represent very good value for money - they
always have and they always will.
4. Our Team of Dealers
The hand picked authorised Onga dealer network
throughout Australia and worldwide are second to none.
We invest considerable time and resources training and
supporting them through the Onga Training Academy.
Congratulations on your decision to purchase an Onga product. Onga is one of the
best known brands in its field, with a proud local and International reputation.
Onga is a brand for reliability, value for money and technological innovation.
So why does Onga lead its field? Here`s a few simple reasons:
You`ll find an Onga product wherever people need to move water in 3 broad markets covering:
Technologically advanced
solutions for moving and
treating water in the Home,
Garden and Pool.
Innovative Stock & Crop
water management solutions
for Primary Industries.
Water movement products
for building services,
emergency services and
original equipment
manufactures

3
IMPORTANT!
The operator must be provided with this owner’s manual. This must be read before
operation and followed during operation.
These instructions are a guide only. Users not familiar with pumping equipment
should seek advice from people with experience in pump installation.
Technical Data
IP Rating: IP55 or IP44
Maximum Working Pressure: 145kPa (413)
160kPa (414)
220kPa (415)
190kPa (416)
260kPa (417)
Maximum Fluid Temperature: 70 C
o
Maximum Ambient Temperature: 55oC
PN PN Pump Material V-ø-Hz kW (P2) AMP Suction Discharge
112 311200 Glass Filled Noryl 230-1-50 1.1 7.2 1 ¼” BSPM 1 ¼” BSPM
112-3ø 311230 Glass Filled Noryl 415-3-50 1.1 3.5 1 ¼” BSPM 1 ¼” BSPM
142 314200 Glass Filled Noryl 230-1-50 1.8 9.6 1 ½ BSPM 1 ½ BSPM
142-3ø 314230 Glass Filled Noryl 415-3-50 1.8 3.2 1 ½ BSPM 1 ½ BSPM
143 314300 Glass Filled Noryl 230/460-1-50 2.4 14 / 7 1 ½ BSPM 1 ½ BSPM
143-3ø 314330 Glass Filled Noryl 415-3-50 2.4 5.2 1 ½ BSPM 1 ½ BSPM
147 314700 Glass Filled Noryl 230-1-50 1.8
148 314800 Glass Filled Noryl 230-1-50 1.8
252 325210 Cast Iron 230-1-50 1.1 7.2 1 ¼” BSPF 1 ¼” BSPF
252-3ø 325230 Cast Iron 415-3-50 1.1 2.6 1 ¼” BSPF 1 ¼” BSPF
182 318200 Cast Iron 230-1-50 1.5 8.9 2” BSPF 2” BSPF
182-3ø 318230 Cast Iron 415-3-50 1.5 3.9 2” BSPF 2” BSPF
183 318300 Cast Iron 230/460-1-50 2.4 14 / 7 2” BSPF 2” BSPF
183-3ø 318330 Cast Iron 415-3-50 2.4 5.5 2” BSPF 2” BSPF
184 318400 Cast Iron 230/460-1-50 3.8 20.6 / 10.3 2” BSPF 2” BSPF
184-3ø 318430 Cast Iron 415-3-50 3.8 7.5 2” BSPF 2” BSPF
185-3ø 318530 Cast Iron 415-3-50 6.0 12.8 2” BSPF 2” BSPF
187 318700 Cast Iron 230/460-1-50 2.4 14 / 7 2” BSPF 2” BSPF
187-3ø 318730 Cast Iron 415-3-50 2.4 5.3 2” BSPF 2” BSPF

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READ AND FOLLOW SAFETY INSTRUCTIONS!
This is the safety alert symbol. When you see this
symbol on your pump or in this manual, look for one of the
following signal words and be alert to the potential for
personal injury:
DANGER warns about hazards that will cause serious
personal injury, death or major property damage if ignored.
WARNING warns about hazards that can cause serious
personal injury, death or major property damage if ignored.
CAUTION warns about hazards that will or can cause
minor personal injury or property damage if ignored.
The label NOTICE indicates special instructions which are
important but not related to hazards.
Carefully read and follow all safety instructions in
this manual.
Electrical Safety
Wire motor for correct
voltage. See
‘Electrical’ section of
this manual and
motor label.
Ground motor before
connecting to power
supply.
Meet National or local
electrical code for all
wiring.
Do not touch an operating motor. Modern motors
are designed to operate at high temperatures. To
avoid burns when servicing pump, allow it to cool
for at least 20 minutes after shut-down before
handling.
General Safety
To avoid heat build-up, over pressure hazard and
possible injury, do not use in a pressure tank
(domestic water) system. Do not use as a booster
pump; pressurised suction may cause pump body to
explode.
Do not allow pump or piping system to freeze.
Freezing can damage pump and pipe, may lead to
injury from equipment failure and will void warranty.
Pump water only with this pump.
Periodically inspect pump and system components.
Wear safety glasses at all times when working on
pumps.

5
a) Preparation for operation
Read these instructions first
Inspect your pump for shipping damage. Report any damage to your Onga
dealer. Make sure the suction piping is free of air leaks and is laid so that
it rises evenly from water source to pump. This makes priming easier and
avoids airlock.
b) Pump Protection
Warranty of these pumps is void unless they are housed correctly and protected
from weather, floods, chemicals, dust, vermin, insects etc. Housing used should
be weather proof and well vented so that motor heat can escape. To obtain best
performanceopumps should be installed as close to water as possible.
Depending on application they do not have to be bolted down.
c) Pump Mounting
The pump must be mounted on a solid, level, vibration free surface.
Moulded pumps can be damaged by connected piping. Pipe should be supported
so the pump casing is not strained by the pipe weight or misalignment.
This appliance is not intended for use by young children or infirm persons
without supervision. Children should be supervised at all times when near this
appliance.
INSTALLATION
Total Suction Head
Feet Metres
Percentage
of Rated
Capacity
10 3.0 80%
15 4.6 70%
20 6.1 57%
Reduction of Capacity with Centrifugal Pump Suction
Please note. Reduction of capacity affects both flow and pressure.
d) Suction
Suction should be laid so that it rises evenly from water source to pump. This
makes priming easy and avoids airlocks.
Pipes should be the same size or larger than the pump inlet and discharge
threads. If piping is longer than 15m (50ft) then a pipe fiction table should be
consulted to obtain the correct size.
All pipe joints must be sealed to ensure they are airtight and a foot or check
valve must be used in the suction pipe. If using a check valve make sure that
it is installed in correct direction.
e) Discharge
The length and diameter of the discharge hoses or pipe will effect the
pressure and flow rate at which your pump operates. Pressure ratings of all
components must exceed the maximum pressure of the pump by an
appropriate safety factor.

6
ELECTRICAL
Disconnect power to motor before working on
pump or motor.
Ground motor before connecting to electrical power
supply. Failure to ground motor can cause severe
or fatal electrical shock hazard.
Do not ground to a gas supply line.
To avoid dangerous or fatal electrical shock, turn
OFF power to motor before working on electrical
connections.
Supply voltage must be no lower than 6% or no
higher than 10% of motor label voltage. Incorrect
voltage can cause fire or damage motor and voids
warranty. If in doubt consult a licensed electrician.
If possible, connect pump to a separate branch
circuit with no other appliances on it.
An earth leakage or residual current protection
device must be fitted to all installations, rated
residual operating current not exceeding 30mA.
A voltage surge protector should be fitted as
voltage spikes or incorrect voltage can cause fire
or seriously damage the motor.
Install, ground and maintain this pump in accordance with electrical code require-
ments. Consult your local building inspector for information about codes.
Provide a correctly fused Residual Current Device or Earth Leakage Device for
protection while working on motor. Consult local or national electrical codes for
switch requirements.
Disconnect power before servicing motor or pump. If the RCD or Earth Leakage
device is out of sight of the pump, lock it open and tag it to prevent unexpected
power application.

7
ELECTRICAL (continued)
If service is required to the
pecialised power lead assembly. Warranty is void if unauthorised modifications
are made to any component.
power lead, it must be replaced with the appropriate s
Protect current carrying and grounding conductors from cuts, grease, heat, oil,
and chemicals.
Motor has automatic internal thermal overload protection. If motor has stopped
for unknown reasons, thermal overload may restart motor unexpectedly, which
could cause injury or property damage. Disconnect power before servicing motor.
If any of the preceding is confusing, consult a licensed electrician.
Make ground connection to green grounding terminal under capacitor cover lid
marked and/or E.
230 volt single phase motors are supplied as standard with on winding thermal
overload protection and are designed to plug directly into a 10 amp (GPO)
domestic power supply to local electrical authority specifications.
OPERATION
Priming the Pump (Suction lift installations)
NOTICE: ‘Priming’ refers to the pump expelling all air in the system and
beginning to move water from its source out into the system. It does not
refer only to pouring water into the pump (although pouring water in is usually
the first step).
NOTICE: NEVER run pump dry. Running pump without water in it will
damage seals and can melt impeller, diffuser and seal plate. To prevent damage,
fill pump with water before starting.
1. Remove priming plug (located on top of the pump casing).
2. Make sure discharge valve(s) and any hoses on discharge side of the
pump are open.
3. Fill pump and suction pipe with water.

8
OPERATION (continued)
4. Replace priming plug, using Teflon tape on thread; tighten plug.
NOTICE: If a priming tee and plug have been provided for a long
horizontal run, be sure to fill suction pipe through this tee and replace
plug. (Don’t forget to Teflon tape the plug.)
5. Start pump: water should be produced in 10 minutes or less, the time
depending on depth to water (suction lift not more than 6 metres) and
length of horizontal run.
If no water is produced within 10 minutes, stop pump, release all pressure,
remove priming plug, refill and try again.
Hazardous pressure and risk of explosion and scalding. If pump is
run continuously at no flow (that is, with discharge shut off or with-
out priming), water may boil in pump and piping system. Under steam
pressure, pipes may rupture, blow off fittings or blow out of pump
ports and scald anyone near.
To prevent explosion, do the following:
A. Ensure discharge (valve, hose nozzle, etc.) is open whenever pump is
running.
B. If pump fails to produce water when attempting to prime, release all
pressure, drain pump and refill with cold water after every two
attempts.
C. When priming, monitor pump and piping temperature. If pump or piping
begin to feel warm to the touch, shut off pump and allow system to
cool. Release all pressure in system and refill pump and piping with cold
water.

9
SERVICE & MAINTENANCE
This centrifugal pump requires little or no regular service
other than reasonable care and periodic cleaning. Occasion-
ally, however, a shaft seal may become damaged and must be
replaced. The procedure as outlined below will enable you to
replace the seal.
NOTICE: The highly polished and lapped faces of the seal are
easily damaged. Read instructions and handle the seal with
care.
REMOVAL OF OLD SEAL
1. After unscrewing impeller, carefully remove rotating part of seal by
prying up on sealing washer, using two screwdrivers (see Figure A).
Use care not to scratch motor shaft.
2. Remove seal plate (baffle) from motor and place on flat surface, face
down. Use a screwdriver to push ceramic seat out from seal cavity (see
Figure B).
INSTALLATION OF FLOATING SEAL
(Figure C)
1. Clean polished surface of floating (ceramic) seat with clean cloth.
2. Turn seal plate over so seal cavity is up; clean cavity thoroughly.
3. Lubricate outside rubber surface of ceramic seat with silicone based
lubricant, ensuring no lubricant gets on the polished ceramic wear face,
and press firmly into seal cavity with finger pressure. If seat will not
locate properly in this manner, place a cardboard washer over polished
face of seal and press into seal cavity using a socket or 13mm
piece of standard pipe. ½” 13mm
Liquid may be HOT, release pressure before servicing.
½” 13mm socket
or 13mm pipe

10
Liquid may be HOT, release pressure before servicing.
Pump should only be serviced by qualified personnel. Make sure to
prime pump before operating. NEVER run pump dry!
If the supply cord is damaged, it must be replaced by the
manufacturer or an authorised service agent.
SERVICE & MAINTENANCE (continued)
4. Dispose of cardboard washer. If need ensure polished surface of seal
seat is free of dirt and has not been damaged during insertion. Remove
any excess lubricant that may have been dislodged during insertion and
ensure that there is no lubricant on the polished face of the seal.
INSTALLATION OF ROTATING PART OF SEAL UNIT
(Figure D)
2. Reinstall seal plate using extreme caution not to hit ceramic portion of
seal on motor shaft.
3. Inspect shaft to ensure that it is clean.
1. Clean face of sealing washer with clean cloth.
4. Lubricate outer face of rubber drive ring with silicone-based lubricant,
ensuring no lubricant touches the polished face, and slide assembly on
motor shaft (sealing/polished face first) until rubber drive ring hits shaft
shoulder (ensure that the polished face does not hit the motor shaft).
5. Screw impeller on shaft until impeller hub hits shaft shoulder. This will
automatically locate seal in place and move the sealing washer face up
against the facing seat.
Should you have any difficulty replacing the seal unit please contact your local
pump professional.

11
Troubleshooting Guide
Symptom Cause Remedy
Pump must be primed; make
sure that the pump casing is
full of water. Refer priming
instructions.
Make sure there are no leaks
in suction piping.
Make sure suction pipe inlet
is well below the water level
to prevent pump from
sucking air.
Suction leaks / lost prime
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 the suction pipe
diameter is large enough.
Make sure that the impeller
is not clogged. This should
be checked by qualified
personnel only.
Impeller and diffuser may be
worn. If so, check with your
local Onga dealer or suitably
qualified personnel.
Clogged pipe / impeller,
worn impeller.
Pump may be trying to push
too high a column of water. If
so, a “higher head” pump is
required.
No power at outlet. Use another electrical
appliance that is known to
work to check the power
outlet.
Blown fuse. Check fuse and replace if
necessary.
Incorrectly sized pipe. Check pipe work pressure
losses and replace with
larger diameter pipe if
required.
Motor burnt out due to
voltage spike or flooded by
water.
The motor may need
replacing.
Valves turned to the closed
position.
Check the plumbing to
ensure the valves are in the
correct position for pumping
on the suction and
discharge.
Pump failure or reduced
capacity or reduced
discharge pressure.
Air ingress to system. Prime the pump. Check that
there are no air leaks in the
suction piping or fittings.
Check that there are no leaks
coming from beneath the
pump.
Thermal Overload tripping:
The thermal overload is
automatic and resets after
the pump has cooled.
If thermal continues to trip
there is something wrong
with the pump.

12
Troubleshooting Guide (Continued)
Symptom Cause Remedy
Low voltage. 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.
Pump running too slowly.
Pump may be too hot. Check line voltage; if less
than 90% or more than
110% of rated voltage
consult a licensed
electrician.
Increase ventilation. Reduce
ambient temperature.
Tighten any loose
connections.
Pump leaking from between
the casing and motor.
Casing bolts are not
tightened sufficiently; Casing
O’ring is worn; Mechanical
seal requires replacing.
Switch off the power to the
pump. Loosen the casing
bolts. Check the alignment
and condition of the casing
o’ring before retightening the
bolts. Replace the o’ring if
leaking persists.
Replace the mechanical seal.
Pump not running. Check power supply. No water.
Gate valve closed. Open gate valve.
Foot valve leaking. Check foot valve for seal, fix
or replace if necessary.
Air lock. Check suction line for
‘humps’. Have your local
pump professional prime the
pump with an engine drive
pump to score air from lines.
Pump will not prime.
Water source has been
drawn down so that suction
is above the water line.
Check suction is submerged.
Should problems persist, contact your nearest Onga service agent.
Pump runs but no water. Air leak in suction pipe. Check suction pipe.
The pump has not been
filled with water.
Water has evaporated leaving
the pump dry.
Foreign matter has clogged
the impeller.

13
REPAIR PARTS LIST
Drawings are indicative only, product appearance may change slightly.
REF
NO. DESCRIPTION
1 CASING 402721 1PC
2 DIFFUSER 402810 1PC
3 YOKE 301850 1PC
4 BAFFLE 402301K 1PC
5 O'RING CASING 702184K 1PC
7 SEAL KIT (INC. 6 & 7) 800887K 1PC
8 IMPELLER (1 PHASE) 506343K 1PC
IMPELLER (3 PHASE) 801235K 1PC
14 MOTOR - 1PH 801015 1PC
MOTOR - 3PH 800447 1PC
15 LEAD 608200K 1PC
18 PRIMING PLUG & O'RING 800017 2PC
NS NUT DOMED (3 PHASE ONLY) 603250 1PC
PART NO.
– 112 Range
REF
NO. C
1
2
3
4 SEAL KIT (INC. 4 & 5) 800583K 1PC
5 SHAFT SLEEVE KIT
6 O-RING - CASING
7
8
9 BOLT & BOLT SEAL (PK/12) 800242K 1PC
10 PRIMING PLUG & O-RING 800017K 1PC
11 MOTOR - 1 PHASE
12
13
OMPONENT DESCRIPTION
CASING 400880GN 1PC
YOKE 402400GN 1PC
IMPELLER 506343 1PC
800895K 1PC
700206K 1PC
BAFFLE 403233 1PC
SCREW (PK/10) 800097 1PC
800445 1PC
MOTOR - 3 PHASE 800447 1PC
LEAD 608200K 1PC
DIFFUSER 402810 1PC
PART NO.
– 252 Range
112 252

14
– 14 Range
REPAIR PARTS LIST (continued)
Drawings are indicative only, product appearance may change slightly.
MODEL
PART NUMBER
REF
NO. DESCRIPTION
1 CASING 301106 1PC 301106 1PC 301106 1PC 301106 1PC
2 DIFFUSER 301431K 1PC 301481K 1PC 301431K 1PC 301431K 1PC
3 YOKE 402061 1PC 402061 1PC 402061 1PC 402061 1PC
4 BAFFLE 403501 1PC 403421 1PC 403501 1PC 403501 1PC
5 O'RING CASING 702180K 1PC 702180K 1PC 702180K 1PC 702180K 1PC
6 SHAFT SLEEVE & O'RING KIT 800895K 1PC 801007K 1PC 800895K 1PC 800895K 1PC
6b O'RING SHAFT SLEEVE (PK 10) 702218K 1PC - 1PC 702218K 1PC 702218K 1PC
7 SEAL KIT (INC. SEAL + 6) 800583 1PC 800890K 1PC 800583 1PC 800583 1PC
SEAL (PK 25) 800900 1PC 800900 1PC 800900 1PC 800900 1PC
8 IMPELLER - 1PH 506353K 1PC 503843K 1PC 507103 1PC 506353K 1PC
IMPELLER - 3PH 801231K 1PC 503849K 1PC - 1PC - 1PC
9 COACH BOLT (PK 10) 800254 8PC 800254 8PC 800254 8PC 800254 8PC
10 WASHER (PK 20) 800151 8PC 800151 8PC 800151 8PC 800151 8PC
11 NUT (PK 12) 702025K 8PC 702025K 8PC 702025K 8PC 702025K 8PC
12 WASHER (PK 20) 800151 4PC 800151 4PC 800151 4PC 800151 4PC
13 SCREW (PK 10) 800097 4PC 800097 4PC 800097 4PC 800097 4PC
14 MOTOR - 1PH 800445 1PC 800446 1PC 801015 1PC 801015 1PC
MOTOR - 3PH 800447 1PC 800449 1PC - 1PC - 1PC
NS NUT DOMED 3PH MOTOR 3/4IN 603250 1PC 603250 1PC 1PC 1PC
15 LEAD 608200K 1PC 608200K 1PC 608200K 1PC 608200K 1PC
16 PRIMING PLUG & O'RING 800017K 1PC 800017K 1PC 800017K 1PC 800017K 1PC
148
314800
PART NO. PART NO. PART NO. PART NO.
142
314200
314230
143
314300
314330
147
314700

15
– 18 Range
REPAIR PARTS LIST (continued)
– 18 Range
REPAIR PARTS LIST
(continued)
REPAIR PARTS LIST
(continued)
MODEL
REF
No. DESCRIPTION
1 CASING & STUD ASSY. 800283 1PC 800283 1PC 800283 1PC 800283 1PC 800283 1PC
2 STUD (PK/10) 800113 1PC 800113 1PC 800113 1PC 800113 1PC 800113 1PC
NS ADAPTOR 504280 1PC 504280 1PC - 1PC - 1PC - 1PC
NS ORING CASING SPIGOT 702231 1PC 702231 1PC - 1PC - 1PC - 1PC
3B ORING ADAPTOR SPIGOT 702203 1PC 702203 1PC - 1PC - 1PC - 1PC
3C ORING DIFFUSER - 1PC - 1PC 702192 1PC 702192 1PC 702192 1PC
4 DIFFUSER 301431K 1PC 301481K 1PC 301884 1PC 301884 1PC 301941 1PC
5 SHAFT SLEEVE KIT 800895K 1PC 800895K 1PC 801007K 1PC 1PC 801007K 1PC
6 YOKE 301650GN 1PC 301650GN 1PC 301650GN 1PC 302010GN 1PC 301650GN 1PC
7 BOLT & BOLT SEAL (PK/12) 800242K 1PC 800242K 1PC 800242K 1PC 800242K 1PC 800242K 1PC
8 ORING CASING 700207K 1PC 700207K 1PC 700207K 1PC 700207K 1PC 700207K 1PC
9 BAFFLE 401322 1PC 401323 1PC - 1PC - 1PC 401322 1PC
10 SEAL KIT (INC. SEAL + ITEM 5) 800890K 1PC 800890K 1PC 800890K 1PC 800871K 1PC 800890K 1PC
11 IMPELLER - 1PH 506353K 1PC 503843K 1PC 403976K 1PC - 1PC 504413 1PC
IMPELLER - 3PH 506353K 1PC 503849K 1PC 403979K 1PC 404036 1PC 504413 1PC
12 NUT (PK/12) 800093K 1PC 800093K 1PC 800093K 1PC 800093K 1PC 800093K 1PC
13 PRIMING PLUG & ORING 800017K 1PC 800017K 1PC 800017K 1PC 800017K 1PC 800017K 1PC
NS PLUG 700230 1PC 700230 1PC 700230 1PC 700230 1PC 700230 1PC
14 MOTOR - 1PH 800445 1PC 800446 1PC 801350 1PC - 1PC 800446 1PC
MOTOR - 3PH 800448 1PC 800449 1PC 800450 1PC 800451 1PC 800449 1PC
15 BASE 504290GN 1PC 504290GN 1PC 504290GN 1PC 504290GN 1PC 504290GN 1PC
16 IMPELLER NUT (3PH) 603250 1PC 603250 1PC 603250 1PC 603250 1PC 603250 1PC
NS WASHER (PK/20) 800151 1PC 800151 1PC 800151 1PC - 1PC 800151 1PC
318430
PART NUMBER
182
318200
318230
PART. NO PART. NO PART. NO PART. N
185
-
318530
187
318700
318730
183
318300
318330
PART. NO
184
318400

No responsibility will be taken for errors, omissions or changes in product specif ications.
L100251 0815
IMPORTANT
Please attach your sales invoice/docket here as proof of purchase should warranty service
be required.
Please do not return Warranty - Retain for your records.
Purchased From .............................................................................................. ................. .......
Purchase Date..................................... Serial No.............................. Model No........................
Distributed in NZ By:
Freephone 0508 634 341
7 Monier Pl, Mt Wellington, Auckland 1060,
New Zealand