onga SMH35 User manual

OWNER’S MANUAL
Should you the installer or owner be unfamiliar with the correct
installation or operation of this type of equipment you should contact
the distributor/manufacturer for the correct advice before proceeding
with the installation or operation of this product.
We recommend, for additional protection, the pump
to be supplied from socket outlet protected by
a residual current device – RCD (also known as
an Earth Leakage Circuit Breaker – ELCB) with a
maximum rated residual current of 30mA.
Horizontal Multistage
Centrifugal Pumps
SMH Range
SMH35 SMH45 SMH55 SMH75 SMH90

Technologically advanced solutions for
moving and treating water in the Home,
Garden, Pool and Spa.
Innovative Stock and Crop water
management solutions for Primary
Industries.
Water movement products for Building
services, Emergency services and
Original Equipment Manufacturers.
Relax - you’ve bought an ...
Congratulations on your decision to purchase an Onga product.
Onga is one of the best know brands in its field, with a proud local
and international reputation.
Onga is a brand for reliability, value for money and technological
innovation. You will find Onga product wherever people need to
move water in 3 broad markets covering:
1

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. Our commitment to
quality is reinforced with our ISO 9001:2000 accreditation.
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.
2

Table of Contents Page
Model Data 4
Application 5
Installation 6
Operation 11
Service and Maintenance 13
Trouble Shooting 14
Warranty 15
3

4
Model Data
Model
Motor
(W)
SMH35 350
SMH45 450
SMH55 550
SMH75 750
SMH90 900
Technical Information
Inlet (Suction): 1” BSPF
Outlet (Discharge): 1” BSPF
Water Temperature Range: 1º - 50ºC
IP Rating: IP44
Electrical Supply: 230V +10%, -6%, 50Hz single
phase
Maximum Ambient temperature: 55 ºC

5
Application
Onga SMH Series pumps are suitable for pumping clean water in a
domestic water system, small irrigation applications, and as pressure
booster pumps. The strength of the stainless steel pump casing coupled
with the impervious nature of the technopolymer impeller and diffuser
make it ideally suited for most potable water pumping applications.
NOTE: Consult your Onga dealer for information regarding the suitability of
each SMH pump in an automatic pressure system prior to installation.

Installation
The electrical installation shall be in accordance with the national
wiring rules (AS/NZS 3000) for class 1, IP44 rated products.
These instructions are a guide only. Users not familiar with
pumping equipment should seek advice from people experienced
in pump equipment and installation.
Freezing conditions will damage the unit, because when water
freezes it expands. Ensure that the pump is located so that it is
not prone to freezing, or ensure that the product is disconnected
and dried of water during cold conditions.
SMH pumps are electrically connected. Ensure that they are
switched off and unplugged from socket outlet during installation
and any subsequent service work.
The pump is designed to be used with clean water in a residential
application. Do not use it with alternative fluids, abrasive,
corrosive or explosive fluids. Do not install or operate your pump
in an explosive environment or near combustible matter.
Incorrectly installed or tested equipment may fail, causing severe
injury or property damage.
Fire and burn hazard. Modern motors run at high temperatures. To
reduce risk of fire, do not allow leaves, debris, or foreign matter
to collect around the pump motor. To avoid burns when handling
the motor, let it cool for at least 20 minutes before trying to work
on it. Automatic thermal overload cut-out protects the motor for
heat damage during operation and it will restart without notice
when the motor cools down.
The pump is not intended for use by young children or infirm
persons without supervision. Young children should be supervised
to ensure that they do not play with the pump.
Read the following instructions in this owner’s manual when installing and
operating equipment.
6

7
1. Preparation for Installation
Inspect your pump for shipping damage. Report any damage to your Onga
stockist. Make sure the suction piping is free of air leaks and is laid so that
there can be no airlocks.
Warranty of these pumps is void unless they are operated in accordance with
this owner’s manual.
2. Pump Protection
The pump should be protected from the weather, floods, chemicals, dust,
vermin, insects etc. It is highly recommended that the pump be housed in a
weather proof, well vented enclosure. If the pump is not adequately housed
the warranty may be deemed void.
3. Pipe Installation
Pumps can be damaged if care is not taken when connecting pipes. Pipes
should be supported so that the pump casing is not strained by the weight
or misalignment.
We recommend the pump and pipe are coupled using flexible type polythene
pipe, rubber hose or a multi-directional barrel union. This union coupling can
also be used to remove the pump for service should it be necessary without
having to cut pipes.
Pipe fittings should be carefully screwed onto the pump making sure not to
cross-thread or overtighten. We recommend the use of a moulded pipe fitting
to connect to the pump as this avoids possible damage to the pump threads
and unnecessary replacement of parts.
For best results use teflon tape to join seal joint. Satisfactory sealing can be
achieved by hand tightening fittings ensuring that no leaks are evident once
under pumping pressure.
4. Locating the Pump
Find a location for your pump as close to your water source as possible.
Ensure that this location is on a seperate footing from your home. To do this
you can mount the pump on a concrete tile or concrete base.
5. Power Source
Arrange for an electrician to install an outdoor 10A GPO electrical outlet near
the pump if there is not one there already.

6. Suction
This is the most important part of the installation as errors will cause significant
problems for the system in performance and longevity.
IMPORTANT: A gate valve must be installed at the tank outlets.
Installations where the tank base is below the pump
Installations where the tank base is level with the pump
8
Min 100mm
100mm
In Line Filter
500 Micron
House Wall
Recommended Length 150mm
Barrel Union
Solid Base
Non-Return
Valve
Gate
Valve
Min 100mm
100mm
In Line Filter
500 Micron
House Wall
Recommended Length 150mm
Barrel Union
Solid Base
Gate
Valve

To maintain optimum performance from your pump, the suction pipe should
be:
- Kept to the shortest distance practical, but not shorter than
the recommended length.
- Re-enforced crush resistant (non-collapsable) hose or pipe.
- All fittings should be air tight.
- Pipes should be equal to or larger than the diameter of the
suction/inlet port.
- Ensure that the suction is completely submerged.
In-line strainers/filters are only recommended for pumps fitted with Minipress,
PressControl or WaterSwitch. Regular maintenance is required to keep them
clean and provide maximum pump pressure.
Consult your Onga dealer for information regarding the suitability of each
SMH pump in an automatic pressure system prior to installation.
7. Discharge
The length and diameter of the discharge hoses/pipes will affect 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. All pipework should be supported independently of the pump.
8. Pump Priming
Ensure that there is at least 200mm of water in your tank, (i.e. that the tank
outlet is covered, and the pump will not draw any air into the system). Open the
gate valve on the tank. Check for any leaks, and repair these if necessary.
If no leaks are present, remove the priming plug to open the priming port on
the top of the pump case.
If the tank is above the level of the pump, water will start to run out of this
port. Replace the priming plug carefully. Your pump is now ready to run.
(Note: If a check valve is installed in the suction line, water may not fill the
pump. If this occurs, follow the instructions below).
If the tank water level is below the level of the pump, you will need to fill the
pump body and suction line. Remove the priming plug and fill the pump body
and suction line using a funnel.
9. Electrical
The pump is supplied with a interconnection appliance coupler and standard
Australian 10 Ampere plug and cord. Connection to the power supply is a
9

10
matter of inserting the plug into the suitable socket outlet. Before plugging
the power supply cord into the socket outlet, connect the pump to it using the
provided IEC appliance connectors on the end of the interconnection cords.
Ensuring there are no water traces on the connectors push them firmly into
each other to ensure intended splash (water) proof protection. This connection
shall be separated again only for service purpose and only after the power
supply is removed by unplugging the cord from the socket outlet.
The socket outlet shall be in a dry and flood free location; preferably do not
use extension cords for this very reason and because they can cause voltage
drop.
Supply voltage outside limits specified in Model
Data can cause motor overheat leading to overload
tripping, reduced component life or seriously
damage pump and voids warranty.
We recommend, for additional protection, the
pump to be supplied from socket outlet protected
by a residual current device – RCD (also known as
an Earth Leakage Circuit breaker – ELCB) with a
maximum rated residual current of 30mA.
WARNING
Hazardous voltage.
Can shock, burn, or
cause death.

Operation
The pump operator or owner must be provided with this owner’s
manual. This must be read before operation, and followed during
operation.
Ensure that your pump is filled with water before operating.
The pump is designed to be used with clean water in a residential
application. Do not use it with alternative fluids, specifically
abrasive, corrosive or explosive fluids. Do not install or operate
your pump in an explosive enviroment or near combustible
matter.
Fire and burn hazard. Modern motors run at high temperatures. To
reduce risk of fire, do not allow leaves, debris, or foreign matter
to collect around the pump motor. To avoid burns when handling
the motor, let it cool for at least 20 minutes before trying to work
on it. Automatic thermal overload cut-out protects the motor for
heat damage during operation and it will restart without notice
when the motor cools down.
1. Start-up / Operation
Ensure you have primed the pump correctly. (Instructions on priming the pump
can be found in the installation section under Point 8. Priming Pump).
Note: If the pump is not used for a long period of time, repeat the priming
procedure before start up.
Start the pump and check rotation of the motor. It rotates in a clockwise
direction when viewing the fan through the cowl behind the motor.
11

2. D.R.O.P (Dry Running Over-Temperature Protection)
The Onga SMH series of pumps (excluding the SMH35) are fitted with the
internationally patented D.R.O.P system which protects the hydraulic parts
from possible damage that can be caused by overheating of the liquid inside
the pump casing.
The overheating can be the result of external causes (outside the pump) or
occurs because the pump stops priming and as water is pumped out the
pump runs dry.
The D.R.O.P system is reset using the switch located on the condenser
box.
3. Restoring Operation
Set the switch to “O”, unplug unit from power outlet. Remove cause of
malfunction.
Wait a few minutes, allowing all the hydraulic parts to cool down.
Set the switch on the “1”, plug the unit into power outlet. The red light
goes off and the pump starts operating. If the red light remains on, turn the
switch to “O”, unplug the unit, wait a few minutes and repeat the start up
procedures.
12

13
Service and Maintenance
Pump should only be serviced only by qualified personel. For
best results, use only genuine service parts. Be sure to prime
pump before starting.
To avoid dangerous or fatal electrical shock, turn OFF power to
pump and remove plug from outlet before attending the pump.
RCD tripping indicates an electrical problem. If RCD trips and will
not reset have a qualified electrician inspect and repair electrical
system and/or pump.
If service is required to the power supply cord and/or appliance
connectors, they must be replaced with the specialised cord
assemblies by Pentair Water service agent or similarly qualified
personnel in order to avoid a hazard.
Liquid may be HOT, release pressure with care before
servicing.
1. General Care and Maintenance
Under normal conditions the Onga SMH series of pumps requires only minimal
attention.
In order to prevent possible failures, it is advisable to periodically check the
pressure supplied and power absorption. A decrease in pressure is a symptom
of wear. An increase current absorpion is a sign of abnormal mechanical
function in the pump and/or motor.

14
Symptom Cause Remedy
Pump does
not operate
and motor
does not run.
No Electricity
Verify presence of electricity.
Not Plugged in correctly Ensure pump is connected properly
Circuit breaker activated Reset circuit breaker
Pump hums
and the
thermal relays
cut in and out
Pump is clogged by
debris
Clean suction pipe and foot valve/
strainer. Clean the pump by flushing
with water. Remove the priming and
drain plugs. If the pump cannot start
after several flushings, it must be
dismantled and cleaned.
Capacitor is defective Replace Capacitor
Pump
operates but
delivers no
water.
Pump is not filled with
water.
Fill the pump with water (see
installation section - Priming Pump )
Suction head is too high Reduce the suction head
Foot valve/strainer is not
submerged enough
Make the suction pipe longer (max 8
metres)
Suction pipe is taking
in air
Check the suction pipe and joints for
air leaks.
Suction pipe/strainer or
non-return valves are
clogged with debris
Clean the suction pipe/strainer or
non-return valve
Pump is clogged with
debris
Clean the pump of debris
Reduced
performance
Suction head is too high Reduce suction head.
Foot valve/strainer only
partially submerged
Lengthen suction pipe.
Pump shaft seal is worn
or damaged
Replace defective parts
Pump is partially blocked
with debris
Remove debris and flush pump with
clean water
Pressure switch setting
are incorrectly set or
faulty.
Check and adjust pressure switch
and/or replace faulty parts.
Should problems persist, contact your nearest Onga Service Agent.
Troubleshooting

15
Pentair Water Product Warranty
PentairWaterwarrantsthat,whenthisproductisusedforthepurposeitwasdesigned,iscorrectlyhousedandventedagainst
weather, vermin, dust etc., that it will be free of material and manufacturing defects at the time of the original purchase.
This warranty is limited to the cost of the product and does not cover third party costs including the costs of
electricians, plumbers, etc. unless authorised by Pentair Water.
TERMSAND CONDITIONSAPPLICABLE INTERNATIONALLY
How long the warranty is effective Internationally
1)ThisPentairWaterproductiswarrantedfor12 monthsforallpartsfromthedateofthefirstconsumerpurchase.Should
any parts fail as a result of such defects within the specified period, the part will be replaced free of charge. (This does
not include travel charges, removal and reinstallation charges.)
TERMSAND CONDITIONSAPPLICABLE INAUSTRALIAAND
NEW ZEALAND
1) YOU SHOULD CAREFULLY READ THE INSTRUCTIONS SUPPLIED PRIORTO USING THIS PENTAIR
WATER PRODUCT.
This product is to be installed and operated in accordance with the instructions
provided. This warranty will not apply if it is used in a manner other than in
accordance with the instructions.
What the warranty covers:
PentairWater warrants itsproductstobefreeofdefectsinmaterialandworkmanshipduringthewarrantyperiod.
If a product proves to be defective in material or workmanship during the warranty period, then Pentair Water
will, at its sole option repair or replace the product with a like product. Replacement product or parts may include re-
manufactured or refurbished parts or components.
How long the warranty is effective:
1) This Pentair Water product is warranted for 24 months for all parts from the date of the first
consumer purchase.
2) Authorised workshop labour will be free of charge for the first 12 month period from date of the first
consumer purchase when unit is found to have failed due to defective workmanship or material
supplied by Pentair Water Australia.
Infield service by an authorised Pentair Water Service Agent will incur a travel, removal &
reinstallation fee payable by customer.
3) Where this Pentair Water product is sold for commercial application as defined in the relevant Trade
Practices and Consumer Protection legislation the warranty shall be for a period of six months from
the date of purchase by the end user.
Who the warranty protects:
This warranty is valid only for the consumer purchaser.
What the warranty does not cover:
1) Damage, deterioration or malfunction resulting from:
a) accident,misuse,negligence,fire,water,lightning,orotheractsofnature,unauthorisedproduct
modification or failure to follow instructions supplied with the product;
b) repair or attempted repair by anyone not authorised by Pentair Water;
c) any damage to the product due to shipment;
d) removal or installation of the product;
e) causes external to the product such as electric power fluctuations or failure;
f) use of supplies or parts not meeting Pentair Water specifications;
g) normal wear and tear;

h) water ingression or exposure to abnormal corrosive conditions or “run dry” conditions;
i) any other cause which does not relate to a product defect.
2) Damage caused to the product as a consequence of use of another manufacturer’s product used in
conjunction with Pentair Water and affiliate companies.
3) Ingress of insects into the unit causing electrical malfunction is not warranted, care should be taken
to avoid this occurrence.
Spare Parts:
Spare parts are usually stocked for a reasonable period of time following last production.
Pentair Water does not warrant that spare parts will be made available for the whole of the reasonable
period and reserves its right to cease supplying spare parts or providing facilities for repair of spare parts
in circumstances which are beyond its control including the requirement to remove spare parts from sale
as a consequence of changes in the law or otherwise as it deems fit.
How to get service:
InAustralia please contact 1800 664 266 In New Zealand please contact 0800 664 269
Claims under this warranty must give evidence of date of purchase, model and serial number of the
product and the claimants name, address and telephone number.
1) To obtain warranted service, you will be required to provide to either Pentair Water state office or
recommended service agent:-
a) the product;
b) confirmation in writing specifying the nature of your claim;
c) proof providing date of original purchase;
d) full contact details including name and address;
e) the serial number of the product if any.
2) The product is to be forwarded by the customer freight paid to an Authorised Pentair Water service
agent.
3) Warranty service work will be denied or suspended, on equipment not readily accessible to service
personnel, that is products that are behind barriers, tiled or bricked in, installed in roofs or second
story external walls including inaccessible power points.
4) Anyserviceofanyproductwhichisfoundtobefaultyduetoabuse,fairwear&tear,misuseorimproper
installation will be charged to the owner at the service agents current servicing hourly rate.
Limitation of implied warranties:
THERE ARE NO WARRANTIES, EXPRESSED OR IMPLIED, WHICH EXTEND BEYOND THE DESCRIPTION
CONTAINED HEREIN INCLUDING THE IMPLIED WARRANTY OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE.
Exclusion of damages:
PENTAIR WATER’S LIABILITYIS LIMITEDTOTHECOST OFREPAIR ORREPLACEMENTOFTHEPRODUCT.
PENTAIR WATER SHALLNOT BE LIABLE FOR:
1) DAMAGE TO OTHER PROPERTY CAUSED BY ANY DEFECTS IN THE PRODUCT, DAMAGES BASED
UPONINCONVENIENCE,LOSSOFUSEOFTHE PRODUCT,LOSSOFTIME,LOSSOF PROFITS, LOSS
OFBUSINESSOPPORTUNITY,LOSSOFGOODWILL,INTERFERENCEOFBUSINESSRELATIONSHIPS,
OR OTHER COMMERCIAL LOSS, EVEN IFADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
2) ANY OTHER DAMAGES, WHETHER INCIDENTAL, CONSEQUENTIAL OR OTHERWISE.
3) ANY CLAIMAGAINST THE CUSTOMER BYANY OTHER PARTY.
Effective law:
This warranty gives you specific legal rights, and you may also have other rights which vary from state
to state. Nothing in this warranty limits or restricts, or is intended to derogate from, any right or remedy
whichthepurchaserorultimateuseroftheproductmayhavepursuanttoAustralianstateand/orAustralian
federal consumer protection legislation, New Zealand Sale of Goods Act, Consumer Guarantees Act, Fair
TradingAct or any other relevant and applicable New Zealand legislation or authority and where necessary
shall so be read and construed.
Pentair Water Product Warranty (Continued)
16

Notes
17

Notes
18

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........................
L100143 B 1206
Pacific Head Office
Australia Pentair Water Australia Pty Ltd
Notting Hill Victoria, Australia
Tel: [phone] Fax: [phone]
Email: [e-mail]
www.pentairwater.com.au
Pentair Water New Zealand Ltd
Penrose Auckland New Zealand
Tel: [phone] Fax: [phone]
Email: [e-mail]
Americas Pentair, Inc.
www.pentair.com
Europe Pentair Pumps S.p.A
www.Pentairpumps.it
Asia China
www.pentairwater.com
India
www.pentairwater.com
© information contained here-in remains the property of Pentair Water Pty Ltd. Any reproduction,
display, publication, modification or distribution is strictly prohibited without the prior written
permission of Pentair Water Pty Ltd.
Disclaimer: Every endeavour has been made to publish the correct details in this data sheet. No
responsibility will be taken for errors, omissions or changes in product specifications. Pentair Water
reserves the right to change specifications