Davey HM Series Manuale utente
Please pass these instructions on to the operator of this equipment.
HM Series
Electric Pumps
Installation and
Operating Instructions
WARNING: Failure to follow these instructions and comply with all applicable
codes may cause serious bodily injury and/or property damage.
WARNING: The pump and associated pipework operate under pressure.
Under no circumstances should the 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.
2
IMPORTANT - outside Australia & New Zealand
Only a locally acceptable plug can be used for this product (Please
use certied plugs only in compliance with your local regulations).
The installation can be only performed by a licensed/ registered
electrical installer.
Please connect certied plug onto power cable in compliance with local
regulations: Active (Brown) Neutral (Blue) and Earth (Green/yellow)
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 ofce as listed on the
back of this document.
Congratulations on your purchase of a high quality, Davey multistage pump.
All components have been designed and manufactured to give trouble free,
reliable operation.
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
HM Electric Pump is designed to handle clean water. The pump should not be used
for any other purpose without specic referral to Davey. The use of the pump to
pump ammable, corrosive and other materials of a hazardous nature is specically
excluded.
General
Applications
Pumps for clear liquids, free of abrasives in residential, agricultural, industrial, and
other applications.
1. Priming Plug
2. Discharge Outlet
3. Suction Inlet
4. Pump Body
5. Motor
Specications
Liquid temperate range: -15 to +105oC
Suction head: depends on NPSH of pump
5
2
1
4
3
3
Choosing a Site
Choose a site with a rm base 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 both water proof, frost
free and has adequate ventilation.
The pump should be 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
The electrical connections and checks must be made by a qualied
electrician and comply with applicable local standards. Poor installation or
poor power supply may even result in electrical res!
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.
NOTE:
1. Ensure motor is connected to power supply specied on nameplate.
2. Avoid long extension leads as they can cause substantial voltage drop
and operating problems.
3. Although the Davey electric motor is specically engineered to perform
on a range of power supply voltages, malfunctions or failure caused by
adverse voltage supply conditions are not covered under guarantee.
In accordance with AS/NZ 60335.2.41 we are obliged to inform you that this
pump is not to be used by children or inrm persons and must not be used
as a toy by children.
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.
Note: 1. Long extension leads should be avoided as they often have insufcient
current carrying capacity to run electric motors, hence they can cause
substantial voltage drop and operating problems.
2. If the electrical ttings in your country make it necessary to remove the
plug from the lead xed to the motor care should be taken to ensure
that the earth conductor green/yellow in the lead is properly connected
to a good earth. This work must only be undertaken by an authorised
electrician.
4
Three Phase
Some HM models are also available as 3 phase
model for 50Hz, nominal 380-415V power supply.
A recommended wiring diagram can be found inside the
capacitor cover (see gure one below). Three phase
units must be wired in by an authorised electrician in
conjunction with a contactor which has “quicktrip” (M10)
overloads set at nameplate current.
Davey recommend the use of overloads
which also have the ability to detect
“single phasing” or “dropped phase”
conditions in the power supply.
Three phase models with output power of
below 1.4kW have been designed to provide
cable entry on the right hand side when viewed
from the non-drive or fan end of the motor.
A terminal block is provided under the capacitor
cover. Note: Three phase motors do not have
capacitors tted in the capacitor cover.
Depending on the motor, access to the terminal block is achieved by either removal
of the fan cowl, or removal of the terminal cover. Before prising the fan cowl ensure
the retaining screw has been removed.
IMPORTANT NOTE: THREE PHASE MODELS ONLY
Before nalising wiring connections, check that motor rotates in direction of
arrow (clockwise when shaft is viewed from wiring connection end except
HM270 models which rotate anti-clockwise). To alter rotation, change any two
power leads at motor terminals.
When the unit is connected and operating the phase balance should be checked.
This should be within 5% variation. “Rolling” the leads may help to improve a small
unbalance, but major phase unbalance will usually be attributed to an input power
unbalance. This must be addressed before the pump is used.
Power connections and wiring must be carried out by an Authorised
Electrician. Means of disconnection must be incorporated in the xed wiring,
in accordance with local wiring rules.
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.
5
Pipe Connections
For best performance use PVC or polythene pipe at least the same diameter as
the pump’s inlet. 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
sufcient tape to ensure
airtight seal and hand
tighten only, do not screw connections all the way into suction port. To prevent strain on
pump thread always support heavy inlet and outlet pipes. Lay suction pipe at a constant
gradient to avoid air pockets which may reduce pump efciency.
NEW Improved HM with self-priming and air handling capability
Your new HM pump or pressure system has the benet of a new upgraded self-
priming and air handling capability.
While Davey must stress the overall requirement for all suction lines to be air tight,
we also are aware that sometimes removing air from suction lines or stopping minor
leaks can be difcult. For this reason Davey have incorporated special features into
your new pump or pressure system to make operation easier and more dependable.
To help you get the most from this new capability please read this addendum in
conjunction with the full Installation and Operating Manual included with your pump.
Plumbing:
Pay special attention to ensuring the suction pipe and associated ttings are airtight.
The absence of a water leak on the suction line may not conrm that the pipe or
ttings are airtight.
In the event that the suction line contains air pockets it can aid the priming process
greatly if you have the ability to temporarily isolate the discharge line from the pump
and instead use an adjacent tap to allow the pump to discharge water until full prime
is established. Such a facility is also useful for future servicing and troubleshooting
should it be required.
Priming:
Filling the pump and suction line with water is made much easier by lling from
the outlet side and allowing any trapped air in the pump to evacuate via one of the
plugged holes on the pump casing.
DO NOT USE THREAD SEALING COMPOUNDS, HEMP OR PIPE DOPE!
NOTE: Suction leaks are the largest
cause of poor pump performance
and are difcult to detect. Ensure all
connections are completely sealed using
thread tape only. DO NOT USE SEALING
COMPOUNDS OR PIPE DOPE.
• To do this with Torrium2 equipped models, temporarily remove the inbuilt check
valve poppet from the Torrium2 and unscrew the SS plug from the casing besides
the outlet.
• For pressure switch controlled models simply prime through the outlet tee with the
plug removed. Remember that pressure switch controlled units require an inlet
checkvalve or footvalve to be used.
• For manual pumps the provision of a priming tee on the outlet can make this
task much easier. For temporary or permanent installation of manual pumps we
strongly recommend the addition of an inlet checkvalve or footvalve as well.
Replace all plugs and the inbuilt check valve poppet in the Torrium2 prior to
connecting power and switching on the pump.
Open the adjacent tap part way and isolate the downstream pipework until
a good strong ow is established. This would indicate you have successfully
“primed” the pump.
Close the adjacent tap and open the valve to the downstream pipelines.
Your pump is now ready for normal operation.
Connection to your Water Source
ABOVE GROUND WATER SOURCES
Installations with ooded suction require a
gate valve so water supply can be turned off
for pump removal and servicing.
Install a one-way check valve in
the suction pipeline to avoid water
draining back past the pump while
not in operation and causing possible
pump damage.
BELOW GROUND WATER SOURCES
NOTE: HM models require a foot valve or check valve to be installed in the
suction pipework in suction lift applications as appropriate.
Whenever the installation position of the pump is higher than the lowest water
level, a foot valve tted to the end of the suction pipe as illustrated in (A) below is
required. Ensure that the foot valve is at least 1/2metre below minimum water level.
MAINS WATER
6
Flow
Over 1m
0.5m
Min
Foot Valve
(Not Supplied)
Flow
Check Valve
Figure A Figure B
Spear Size Mesh Approx. Max. Capacity of Spear Point
11/4” (32mm) 60 15 - 23 l/min or 200 - 300 gal/hr
11/2” (38mm) 60 23 - 38 l/min or 300 - 500 gal/hr
2” (50mm) 60 38 - 75 l/min or 500 - 1000 gal/hr
NOTE: Be certain to select the spear point to suit the well conditions and
regulate the ow rate from the pump accordingly.
NOTE: DO NOT install the check valve at the pump or at the top of the
well. DO NOT run the pump without water.
SPEAR POINT INSTALLATIONS
When an HM is installed on a spear or well point a check valve tted
immediately on top of the spear point itself, as shown in (B) above.
Dry-running protection
To avoid accidental loss of prime of the pump, we recommend protecting it with a
suitable device. Note: damage from dry-running is not covered by guarantee.
Connection of Mains Scheme or Town Water Supply to either Suction or
Discharge of Pumps
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.
MAINS WATER
7
8
Priming and Operation
The pump body and suction line should be lled by pouring water into the priming
plug hole adjacent to the outlet. Screw on the priming plug, close the discharge
valve two thirds and switch pump on. Gradually open the discharge valve and the
pipeline lls.
In high suction lift conditions, the pump may make a noise similar to it pumping sand
or gravel; this will usually be cavitation occurring. Reduce ow until the cavitation
noise stops. Once the discharge pipeline lls you can open the valve. If the
cavitation noise returns, close the discharge valve slightly until it stops.
In the case of installations where there is a positive suction pressure (ooded
suction) remove the pump’s priming plug and slowly open the gate valve in the
suction piping to allow water to enter the pump from the suction line until all air is
expelled. Replace the priming plug and fully open the gate valve in the suction line
and switch the pump on.
Prime should be established almost immediately, however, it may be necessary to
re-prime several times on some installations before fully established optimum pump
performance is obtained.
If pump runs but will not pump water, check for the following:
1. Suction line and pump body not lled with water.
2. Leaking foot valve.
3. Air leaks in suction lines.
4. Air trapped in suction line (even on ooded suction) possibly when there is an
uneven rise in the piping from water to pump (eliminate “humps and hollows”)
3. Switch on.
4. Prime should establish almost
immediately with a strong
ow of water, however, in
some installations it may
be necessary to repeat
the above operation to
remove all air from the
system.
1. Ensure outlet nearest to
pump is open.
2. Fill pump body and suction line
through priming plug hole located
above suction inlet and replace plug.
Do not run pump dry or allow to run continuously in a loss of prime
condition. If this pump is allowed to pump water containing sand or other
abrasive material, the effective life of the pump will be shortened.
9
Trouble Shooting Check List
MOTOR OPERATING BUT NOT PUMPING
1. Suction line and pump body not lled with water.
2. Leaking foot valve.
3. Air leaks in suction lines or suction pipe not under water.
4. Air trapped in suction lines (also possible with ooded suction)
due to uneven rise in piping (eliminate humps and hollows).
5. No water at source or water level too low.
6. Valve on suction or delivery lines closed.
MOTOR NOT RUNNING
1. Power not connected.
2. Supply voltage too low.
3. Overload tripped.
4. Motor not free to turn e.g. a blocked impeller.
5. Internal motor fault.
MOTOR RUNS FOR SOME TIME THEN STOPS - RESTARTS AUTOMATICALLY
AFTER SHORT TIME
Overload tripping in motor - low voltage at motor terminals
- motor in direct sunshine or in “hot box”
- motor not free to turn (eg: blocked)
WARNING:
DO NOT RUN DRY.
DO NOT RUN WITH LOSS OF PRIME.
DO NOT PUMP WATER CONTAINING ABRASIVE MATERIALS.
10
*NOTE “MOTOR PROTECTION DEVICE” :
For protection, the Davey pump motor is tted with an automatic reset
thermal overload, constant tripping of this overload indicates a problem
e.g. low voltage at pump, excessive temperature in pump enclosure.
WARNING: When servicing or attending pump, always ensure power is
switched off and lead unplugged. Electrical connections should be serviced
only by qualied persons.
WARNING: Do not use hydrocarbon based or hydrocarbon propelled
sprays around the electrical components of this pump.
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.
IMPORTANT:
DO NOT USE petroleum based uids or solvents (e.g. Oils, Kerosene,
Turpentine, Thinners, etc) on the plastic pump components or seal
components.
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