Davey HS20-65Y2 User manual

NOTE: Prior to installation remove the red transport plugs & associated seals from the suction and/or
discharge ports.
WARNING: Failure to follow these instructions and comply with all applicable codes may cause serious bodily
injury and/or property damage.
Please pass these instructions on to the operator of this equipment.
Installation and
Operating Instructions
for Davey HS20-65Y2
Multistage Pump

Prior to using this pump you must ensure that:
• The pump is installed in a safe and dry environment
• The pump enclosure has adequate drainage in the event of leakage
• Any transport plugs are removed
• The pipe-work is correctly sealed and supported
• The pump is primed correctly
• The power supply is correctly connected
• All steps have been taken for safe operation
Appropriate details for all of these items are contained in the following Installation and Operating
Instructions. Read these in their entirety before switching on this pump. If you are uncertain as to any of
these Installation and Operating Instructions please contact your Davey dealer or the appropriate Davey
ofce as listed on the back of this document.
Congratulations on your purchase of a high quality, Davey pump. All components have been designed and
manufactured to give trouble free, reliable operation.
Model HS20-65Y2
1. Priming Plug
2. Removable Check Valve
3. Suction Inlet (11/4”NPSF)
4. Pump Body
5. Motor
6. Discharge Outlet (1” BSPF)*
* 1” BSPF will accept 1” NPT male ttings.
Choosing a Site
Choose a site with a rm base and as close to the water source as possible
with correct power supply. Make sure your pump is always connected to an
adequate, reliable source of clean water.
Housing your Davey Pump
To protect your pump from the weather, make sure the pump house is
water proof, frost free and has adequate ventilation. The pump should be
horizontally mounted on a rm base allowing for drainage, to avoid damage
to ooring etc. that over time may occur from leaking pipe joints or pump
seals. Do not mount the pump vertically.
Do not use this pump to pump ammable uids, such as gasoline or
diesel fuels.
Abrasive Materials
The pumping of abrasive materials will cause damage to the pump which will
then not be covered by the guarantee.
Before installing your new pump, please read all instructions carefully as failures caused by incorrect
installation or operation are not covered by the guarantee. Your Davey pump is designed to handle clean
water. The pump should not be used for any other purpose without specic referral to Davey. The use of the
pump to pump ammable, corrosive and other materials of a hazardous nature is specically excluded.
NOTE: Your Davey Multistage Pump is designed to operate as a manual pump or as a pump for
an irrigation system started by a pump start relay.
~ 2 ~
WARNING: Some insects, such as small ants, nd electrical devices attractive for various
reasons. If your pump enclosure is susceptible to insect infestation you should implement a
suitable pest control plan.

~ 3 ~
Electrical Connection
HS20-65Y2 models are 230 volt 60Hz only.
They should be connected as per the wiring
diagram (Right). The colour codes are: Green
= Ground/Earth, Black = Hot, Active or L1,
White = Neutral or L2.
To t the power lead to the HS20-65Y2, follow the
instructions below :-
1. Remove terminal cover from end of motor.
2. Feed power lead through hole in end shield
(see A on illustration). Fit grommet (B) to
lead.
3. Fit wires to the terminal block (C) as shown
in wiring diagram above.
4. Attach earth lead (green/yellow) at the earth
screw (D).
5. Put grommets from power lead in slots in
end shield as illustrated.
6. Put power lead into tortuous path on end
shield (E).
7. Tidy up power and capacitor leads, and
other wiring, to avoid pinching when the
terminal cover is replaced.
8. Replace terminal cover.
Connect power cord to power supply designated on pump label. Do not
use long extension cords as they cause substantial voltage drop, poor
pump performance and may cause motor overload.
Power connections and wiring must be carried out by an
authorized electrician.
Never run pump dry.
This pump is not to be used by children or inrm persons and
must not be used as a toy by children.
All wiring must conform to National (NEC), CSA, state, provincial, and local codes. Power supply
voltage, phase and controls must match motor.
Always disconnect and lockout all electrical power when installing or working on pumps,
motors or switches. Ensure the power supply breaker is off or the disconnect (where used)
is off.

NOTE: Suction leaks are the largest cause of poor pump performance and are
difcult to detect. Ensure all connections are completely sealed using thread tape
only. An air leak on the suction may not drip water!
~ 4 ~
For best performance use pipes at least the same diameter as the pump’s inlet and delivery outlet openings.
Larger diameter pipe may be used to minimise resistance to ow when pumping longer distances. When pump
is installed with incoming pressure (eg. boosting municipal supply) smaller inlet and outlet pipes may be
adequate.
Use unions at pipe connections to enable easy
removal and servicing. Use sufcient tape to
ensure airtight seal and hand tighten only. To
prevent strain on pump threads always support
heavy inlet and outlet pipes.
If there is a likelihood the water supply may contain solid particles
such as pieces of plant or vegetable matter, a lter should be installed
before the pump to avoid blocking of water ways. Ensure lter is
cleaned regularly. Lay suction pipe at a constant gradient to avoid air
pockets which may reduce pump efciency.
Do not use pipe thread sealing compound on any part of this
pump. Only use teon sealing tape.
Ensure wall socket is correctly grounded. Grounding of the
motor is essential for your protection and the protection of the
motor.
Failure to ground motor can cause severe or fatal electrical
shock hazard.
Do not ground to a gas supply line.
Supply voltage must be within +10% of nameplate voltage.
Incorrect voltage can cause re or seriously 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.

DRIVEN SIZE MESH APPROX. MAX. CAPACITY OF DRIVEN POINT
11/4” 60 200 - 350 gal/hr
11/2” 60 350 - 600 gal/hr
2” 60 600 - 1150 gal/hr
Abrasive Materials
The pumping of abrasive materials will cause
damage to the pressure system which will
then not be covered by the guarantee.
BELOW GROUND WATER SOURCES
Whenever the installation position of the pump is higher than 3ft above the lowest water level, a foot valve
must be used on the end of the suction pipe as
illustrated in (A). Ensure that the foot valve is at
least 11/2feet below minimum water level.
(DRIVEN) POINT INSTALLATIONS
When a HS Multistage Pump is installed on a
(driven or well) point, a check valve must be tted
immediately on top of the driven point itself, as
shown in (B). DO NOT INSTALL THE CHECK
VALVE AT THE PUMP OR AT THE TOP OF THE
WELL. DO NOT RUN THE PUMP WITHOUT
WATER. NOTE: Be certain to select the driven
point to suit the well conditions and regulate
the ow rate from the pump accordingly.
Driven point ow capacities vary considerably. Check with the supplier
to ensure the pump and spear point are correctly matched.
~ 5 ~
Where to use Check Valves and Foot Valves
Installations with a suction lift over 3ft require a good quality foot valve to
avoid loss of prime. In this case, the check valve inside the pump should
be removed or overridden (refer pg 6).
Connection to your Water Source
FLOODED SUCTION - FROM CISTERN OR STORAGE TANK
Installations with ooded suction require a gate valve so water
supply can be turned off for pump removal and servicing.

~ 6 ~
Inlet Check Valve Removal / Override
If your installation requires the removal of the in-built check valve or the in-
built check valve requires removal for servicing, this can be achieved without
difculty. The in-built check valve is a cassette design, which is screwed in
through the suction inlet.
Removal of the check valve cassette is achieved by inserting any suitable tool
(eg. a pair of pliers or the handle from an adjusting spanner) into the inlet.
The check valve cassette has various ribs and recesses to allow a variety of
nonspecic tools to be used in the removal or insertion process.
Priming and Operation
1. Ensure outlet nearest to pump is open.
2. Remove priming plug, located above suction inlet, and ll casing and suction
line (on ooded suction, simply open gate valve to pump). When full,
replace priming plug.
3. Ensure all valves in suction line are open.
4. Switch on power and the pump will run. A full ow of water should
be discharged from the open tap within a few seconds.
5. If the pump fails to obtain ow (prime) or ow is unsatisfactory go to steps 5a or 5b as applicable.
a) If a partial ow only was established, re-prime and re-start the pump until ow is evident from
the open discharge. This should only take approximately 15 seconds.
b) If no ow at all was established before the pump was stopped, repeat the process from step 1.
Never operate your Davey pump for more than a few seconds
without discharge ow.

Where freezing may be a problem, all pipework should be buried and/or insulated (lagged) to prevent this
happening. Your Davey pump should be housed in an enclosure which does not experience temperatures
below freezing (32oF).
Trouble Shooting Check List
MOTOR RUNS WHEN SWITCHED ON BUT DOES NOT PUMP
1. Suction line and pump body not lled with water.
2. Air leaks in suction lines or suction pipe not under water.
3. Air trapped in suction lines (also possible with ooded suction due to uneven rise in piping: eliminate
humps and hollows).
4. No water at source or water level too low.
5. Valve on suction lines closed.
PUMP WORKS FINE AT FIRST, THEN FLOW DROPS SUBSTANTIALLY
1. Blocked lters - check to ensure all lters (if installed) are clean and free from blockage.
2. Flow may be limited from source (eg. too small a supply line and/or inadequate ow). Install a holding
tank before the pump if the source cannot be improved.
MOTOR DOESN’T START WHEN SWITCHED ON
1. Power not connected or no power available from supply outlet.
2. Supply voltage too low - check supply voltage.
3. Incorrect supply voltage (eg. HS20-65Y2 is 230V only).
4. “Over temperature” cut-out tripped - switch off, wait 10 minutes and switch on again.
5. Motor not free to turn - eg. a jammed impeller.
6. Internal motor fault.
During servicing, use only approved, non-petrochemical based oring and gasket
lubrication. If unsure, consult your Davey dealer for advice.
Care should also be taken when servicing or disassembling pump to avoid possible
injury from hot pressurized water. Unplug pump, relieve pressure by opening a tap
on the discharge side of the pump and allow any hot water in the pump to cool before
attempting to dismantle.
WARNING: When servicing or attending pump, always ensure power is switched off and
lead unplugged. Electrical connections should be serviced only by qualied persons.
WARNING: Do not use hydrocarbon based or hydrocarbon propelled sprays around the
electrical components of this pump.
Motor normally operates at high temperature and may be too hot to touch. Before
handling pump or motor, stop motor and allow it to cool.
~ 7 ~
FREEZING CONDITIONS: In situations subject to freezing, drain water
from pump & pipework to avoid damage not covered under guarantee.

P/N 49433-3
AUSTRALIA
Davey Support Centre
6 Lakeview Drive,
Scoresby, Australia 3179
Ph: 1300 367 866
Fax: [phone]
Website: davey.com.au
Davey Water Products Pty Ltd
Member of the GUD Group
ABN 18 066 327 517
NEW ZEALAND
Davey Support Centre
7 Rockridge Avenue,
Penrose, Auckland 1061
Ph: 0800 654 333
Fax: [phone]
Website: daveynz.co.nz
® Davey is a registered trademark of Davey Water Products Pty Ltd.
© Davey Water Products Pty Ltd 2013.
* Installation and operating instructions are included with the product when purchased new.
They may also be found at davey.com.au
Davey®Repair or Replacement Guarantee
1. The guarantee period commences on the date of original purchase of the equipment.
Evidence of this date of original purchase must be provided when claiming repairs under
guarantee. It is recommended you retain all receipts in a safe place.
2. Davey products are warranted to the original user only to be free of defects in material
and workmanship for a period of 12 months from date of installation, but no more than 24
months from date of manufacture. Davey’s liability under this warranty shall be limited to
repairing or replacing at Davey’s option, without charge, FOB Davey’s distribution center
or authorized service agent. Davey will not be liable for any costs of removal, installation,
transport or any other charges that may arise in connection with the warranty claim.
3. This guarantee is subject to due compliance by the original purchaser with all directions
and conditions set out in the Installation and Operating Instructions. Failure to comply
with these Instructions, damage or breakdown caused by fair wear and tear, negligence,
misuse, incorrect installation, inappropriate chemicals or additives in the water, inadequate
protection against freezing, rain or other adverse weather conditions, corrosive or abrasive
water, lightning or high voltage spikes or through unauthorized persons attempting repairs
are not covered under guarantee. The product must only be connected to the voltage
shown on the nameplate.
4. Davey shall not be liable for any loss of prots or any consequential, indirect or special loss,
damage or injury of any kind whatsoever arising directly or indirectly from the product or
any defect, and the purchaser shall indemnify Davey against any claim by any other person
whatsoever in respect of any such loss, damage or injury.
5. Some states do not allow the exclusion or limitation of incidental or consequential damages
or limitations on how long an implied warranty lasts, so the above limitations or exclusions
may not apply to you. The warranty gives you specic legal rights and you may also have
other rights which vary from state to state.
6. This guarantee applies to all states and territories of United States of America and Canada
only.
®Davey and Torrium are registered trademarks of Davey Water Products Pty Ltd.
© Davey Water Products Pty Ltd 2013
USA
Have installment questions or problems?
Need warranty?
Before returning this product to your dealer contact a
Davey Authorized Service Centre in USA by calling 86.328.7867
or visit www.daveyusa.com