Davey HM Series User manual

Please pass these instructions on to the operator of this equipment.
WARNING: The Torrium2 controller, pump and associated pipework operate
under pressure. Under no circumstances should the Torrium2 controller, pump
or associated pipework be disassembled unless the internal pressure of the
unit has been relieved. Failure to observe this warning will expose persons to
the possibility of personal injury and may also result in damage to the pump,
pipework or other property.
WARNING: Failure to follow these instructions and comply with all applicable codes
may cause serious bodily injury and/or property damage.
NOTE: Prior to installation remove the inlet and outlet
pipe transport plugs & associated seals from the suction
and/or discharge ports.
Installation and
Operating Instructions
for Davey HM Series
Pressure Systems with
Pressure Switch
(Pressure Tank required and purchased seperately)

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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, Australian built Davey
pressure system. All components have been designed and manufactured
to give trouble free, reliable operation.
1. Pressure Tank (purchase seperately)
2. Pressure Switch
3. Discharge Outlet
4. Suction Inlet
5. Pump Body
6. Motor
7. Pressure Gauge
8. Priming Plug (pump)
9. Non-Return Valve (not illustrated,
supplied loose)
Pressure Tank
Your Davey HM Series Pressure Pump requires the connection of a Hydro
Pneumatic pressure vessel. This can be connected by screwing it directly
on to the top of the discharge outlet or can be connected via a hose to the
side of the discharge tee.
We recommend the Davey Supercell range of tanks.
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 pressure system is designed to handle clean water. The system should not be
used for any other purpose without specic referral to Davey. The use of the system to
pump ammable, corrosive and other materials of a hazardous nature is specically
excluded.
NOTE: Prior to installation remove the red transport plugs from the suction and/or discharge.
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Pressure Switch Setting and Tank Precharge
Your Davey HM Series Pressure Pump should have the correct pressure
switch settings for zero suction lift. If your pump is installed with a suction
lift you may need to have the cut out switch settings adjusted. The
pressure tank(s) tted must be air pre-charged as per the table in the
maintenance section of these instructions.
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 pressure system is
always connected to an adequate, reliable source of clean water.
Housing your Davey Pressure System
To protect your pressure system from the
weather, make sure the pump house is both
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. Never place
ammable materials on or near your pump.
Power Connection
Connect lead to power supply designated on pump label. Do not use
long extension leads as they cause substantial voltage drop, poor pump
performance and may cause motor overload.
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.
The electrical connections and checks must be made by a qualied
electrician and comply with applicable local standards. Poor installation
or poor power supply may even result in electrical res!
WARNING: Do not use hydrocarbon based or hydrocarbon propelled sprays
around the electrical components of this pump.
In accordance with AS 3350.2.41 we are obliged to inform you that this
pump is not to be used by children or inrm persons and must not be used
as a toy by children.

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Electrical Power Surge Protection
An electrical power surge or spike can travel on the supply lines and cause
serious damage to your electrical equipment.
If the installation is subject to electrical power surges or lightning we
strongly recommend the use of suitable additional surge protection devices
on ALL electrical equipment.
In accordance with AS 3350.2.41 we are obliged to inform you that this
pump is not to be used by children or inrm persons and must not be used
as a toy by children.
Pipe Connections
For best performance use
P.V.C. or polythene 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.
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. Lay suction pipe at a
constant gradient to avoid air pockets which may reduce pump efciency.
Do not use pipe thread sealing compounds on any part of this
pump. ONLY use Teon sealing tape.
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.
NOTE: For protection, the Davey pump motors are tted with an automatic
reset thermal overload, constant tripping of this overload indicates a
problem e.g. low voltage at pump, excessive temperature (above 50°C) in
pump enclosure.

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Where to use Check Valves
and Foot Valves
A check valve is required for tting to
installations with ooded or positive suction.
Care should be taken to ensure that it is
correctly installed in the suction line for
installations with ooded or positive suction.
Installations with ooded suction require a
gate valve so water supply can be turned
off for pump removal and servicing.
On installations with a suction lift a good
quality foot valve with strainer is required.
Installations with ooded suction require
a gate or isolating valve so water supply
can be turned off for pump removal and
servicing.
For Automatic Pressure Pumps Installed with a
Mains Pressure Hot Water System
To protect your system from damage
caused by back pressure from hot water
systems. You should always have installed
on the hot water inlet an approved non-
return valve.
DO NOT USE THREAD SEALING COMPOUNDS, HEMP OR PIPE
DOPE!
MAINS WATER
Check valve
Abrasive Materials
The pumping of abrasive materials will cause damage to the pressure
system which will then not be covered by the guarantee.
Approved
non-return valve
NOTE: Always ensure hot
water systems are installed in
compliance with manufacturers
recommendations and in accordance
with all local regulations.

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Connection of Mains Scheme or Town Water
Supply to either Suction or Discharge of Pumps &
Pressure Systems
Most Water Supply Authorities have strict regulations regarding direct
connection of pumps to mains water supplies. In most cases an isolating
tank is required between mains supply and pump. Davey also recommend
this method. Directly applied mains pressure can exceed pump operating
pressure and damage pump.
Davey Water Products Pty Ltd can not accept responsibility for loss or
damage resulting from incorrect or unauthorised installations.
Priming and Operation
1. Remove priming plug and ll casing and
suction line (on ooded suction, simply
open gate valve to pump). When full,
replace priming plug.
2. Ensure outlet nearest to pump is open.
MAINS WATER
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. If the electrical supply lead of this
pressure system is damaged, it must be replaced.

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3. Ensure all valves in suction line are open and plug into electrical supply.
4. Switch on power and the pump will run. A full ow of
water should be discharged from the open tap. Allow
water to ow for 10-20 seconds, or at least until all air has
been expelled from the pump and then close the outlet.
5. If the pump stops pumping (no water ow), with the tap
open, stop the pump and repeat from Step 1 onwards.
If the pump motor stops with the tap open see troubleshooting checklist.
6. Close the open outlet or tap and the pump should stop after a few
seconds. If not, stop the pump and repeat from Step 1 onwards or
consult the troubleshooting checklist.

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Maintenance
The only regular attention your new pressure system requires is to check
the pressure tank’s air charge every 6 months.
This can be checked at the air valve with a tyre gauge. Do not charge tank
to a higher pressure than 14 kPa below cut-in
pressure setting.
To check air pressure in tank:
1. Switch off pump.
2. Open outlet nearest to pump to release water pressure.
3. Remove air valve cap from top of Supercell tank and charge tank to
correct pressure using air pump and check with tyre gauge.
4. Switch on.
5. Close outlet.
NOTE:
Your pump is designed to operate as an automatic pressure system.
The pressure tank will require a specic precharge air pressure dependent
upon model.
While your pressure tank may have been precharged in manufacture,
the precharge pressure should be checked upon installation and every
6 months thereafter. Follow the instructions on the tank. As a guide, the
precharge settings are listed below:-
Pressure Settings
Pump Model Cut Out Cut In Tank
kPa kPa kPa
HM270-19P 300 200 180
HM60-06P
HM90-08P 400 250 230
HM160-15P
HM270-25P
HM60-08P
HM90-11P 500 300 280
HM160-19P
HM60-10P 620 350 330
HM90-13P
Note: The above are standard settings which may be adjusted according
to site conditions. Any adjustments should only be made by a suitably
qualied and experienced person.

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Trouble Shooting Check List
A) 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 line closed.
B) PUMP SWITCHES ON AND OFF FREQUENTLY (CYCLING).
1. Check that tank air pressure is correct.
2. Leaking taps, oat valves etc. Check plumbing.
3. Leaking check valve/foot valve.
4. Pressure Switch may require adjustment to cater for ooded suction
installations – consult your Davey dealer for advice.
C) MOTOR DOESN’T START WHEN SWITCHED ON
1. Power not connected.
2. Supply voltage too low.
3. “Over temperature” cut out tripped.*
4. Motor not free to turn e.g. a jammed impeller.
5. Internal motor fault.
NOTE: For protection, single phase Davey pump motors are tted with
an automatic “over temperature” cut-out. Constant tripping of this
overload device indicates a problem e.g. Low voltage at pump, excessive
temperature (above 50°C) in pump enclosure.
Care should also be taken when servicing or disassembling pump to avoid
possible injury from hot pressurised 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. If the electrical supply lead of this
pressure system is damaged, it must only be replaced by authorised Davey
service personnel as special tools are required.

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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. If the electrical supply lead of this
pressure system is damaged, it must be replaced.
Care should also be taken when servicing or disassembling pump to avoid
possible injury from pressurised 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.
During servicing, use only approved, non-petrochemical based oring and
gasket lubrication. If unsure, consult your Davey Dealer for advice.
WARNING: Do not use hydrocarbon based or hydrocarbon propelled
sprays around the electrical components of this pump.
NOTE: For protection, the Davey® pump motor is tted with an automatic
“over temperature” cut-out. Constant tripping of this overload device
indicates a problem e.g. low voltage at pump, excessive ambient
temperature (above 50°C) in pump enclosure.
WARNING: Automatic reset thermal overloads will allow the pump to restart
without warning. ALWAYS disconnect the pump motor from the electrical
supply before maintenance or repairs.