Davey 4 Submersible Borehole Pumps SERIES J - Manual (Page 2)

2
Installation & Operating Instructions
It is important that all submersible borehole pumps be installed by experienced persons and that all electrical connections
comply with the relevant electrical supply authority requirements.
These instructions are provided for guidance only, and assume a familiarity with submersible pump installation and
commissioning procedures.
Should additional information or clarification of certain points be required in Australia, contact our Customer Service
Centre on 1300 2 DAVEY (1300 232 839). For New Zealand contact the Davey Products Pty Ltd office on (09) 444 3622.
Bore Conditions
1. To guard against installing a pump in aggressive or abrasive water, it is suggested that an analysis of the bore
water be submitted to an authorised testing authority prior to installation of the pump. Damage to the pump or
motor caused by abrasive or aggressive water is not covered by the guarantee. The water analysis parameters
listed below are intended as a guide only as various combinations of the below items and others may act as a
corrosive fluid:
PH - 6 to 8
Total dissolved solids (PPM) - 1,000 maximum
Chlorides (PPM) - 500 maximum
Fe (PPM) - 2 maximum
C0 2 (PPM) - 50 maximum
O 2 (PPM) - 2 minimum
Sand content - 25 gr/m 3 maximum
2. Know the approximate replenishment rate of the bore before selecting a pump. Select a pump with a maximum of
10% less discharge than the replenishment rate of the bore.
3. Where bores are sunk into aquifers comprising of sand or fine gravel, it is important that they be adequately
screened to prevent the ingress of these materials into the water being pumped. It is also important that the bore
be cleaned prior to the installation of the pump, and that the pumps must not be used for “bailing” or developing the
bore.
4. In the event that the water is entering the bore from a level above the pump (“a cascading bore”), or where the
pump is installed in a large diameter bore, or in a river or other open water sources, a shroud may be required
over the pump to ensure that all water being pumped is drawn over the full length of the motor’s surface. Minimum
water velocity past a motor for adequate cooling should be 0.08m/sec @ 20
o C water temperature.
5. To assist in protecting the integrity and quality of your bore water supply we suggest a bore cap be fitted to the top
of your bore casing at all times. This may also assist pump installation.
Coupling the pump with the motor
For ease of transportation and to minimise potential transport damage, Davey 4” submersible borehole pumps are
supplied in component form, ie. motor and liquid end boxed seperately. For correct coupling, proceed as follows:
-
Remove cable guard after removing the lock screws.
- Remove the check valve or unscrew the poppet retainer and remove the check valve poppet dependant upon
model and insert a screwdriver into the shaft end to ensure the pump is free to rotate. Some small resistance is
normal.
- Position the pump and motor so that they are aligned along the same axis.
- Insert the motor shaft into the pump coupling, using the screwdriver to rotate the shaft to align the coupling to the
motor shaft.
- On each motor stud fit the four nuts which secure the pump to the motor, tightening them a little at a time in a
diagonal sequence. Where the nut is to have the stainless strainer fitted, ensure that these nuts and the motor jam
nut have the flats aligned parallel to the motor adaptor circumference.
- Align the motor cable along the pump, then secure the cable guard with the setscrews into the side of the pump.
The electrical connections and checks must be made by a qualified electrician and comply with appli-
cable local standards.
WATER QUALITY: The above guide is NOT an indication of safe drinking water. A water analysis for
this purpose should be undertaken.
NOTE: Before coupling pump to motor ensure pump and motor models are as specified.