Davey 165D DEEP WELL PRESSURE PUMPS & SYSTEMS - Manual (Page 3)

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5. Remove suction cover from pump and screw elbows supplied with Deep Well
Injector into cover, ensuring that an air tight seal is achieved. Use ample thread
seal tape. Fit polythene pipes onto elbows, again ensuring that no air leaks
exist. “Silastic” used in joints between pipes and connectors will assist in
sealing.
6. Lower injector into bore and re-attach suction cover to pump with rubber
gasket, evenly tightening cover retaining nuts.
7. Attach injector model label (supplied with Injector Kit) to pump suction cover as
shown.
8. Connect outlet piping at gate valve.
9. Fit pressure gauge (supplied with pump) at top of pump as indicated on
illustration.
For Manual Operation (i.e. without pressure tank)
Follow procedure as above, except no pressure tank fitted as described under (2).
Remove pressure switch tube from regulating valve and plug connection hole with
fitting supplied.
Housing your Pump
As the pump is an electrical apparatus, it must be protected from the weather, at
the same time adequate ventilation must be provided for the motor.
Your pump should be securely bolted to a firm base, high enough to prevent
any surface water that may accumulate from coming into contact with the unit.
Positioning of the unit should allow the nameplate to be easily read, and provide
adequate access for service purposes.
Water Quality
Your Davey pump is made from food safe materials, and tested using sanitised
water. Davey has no control over your pump once it leaves our warehouse.
For potable (drinking) water applications we recommend that you flush the pump
with clean water prior to use.
Do not enclose the pump in such a manner that a “Hotbox” condition is created.
Ventilation should be provided near the top of any enclosure to prevent a buildup of
condensation.
The power outlet may need to be provided by an electrician in a safe, dry place
(possibly within the weather proof enclosure).
WARNING: Some insects, such as small ants, find electrical devices attractive for
various reasons. If your pump enclosure is susceptible to insect infestation you
should implement a suitable pest control plan.
Trouble Shooting
1. Pump not Delivering Water or not Building Up Pressure
May be caused by one or more of the following:-
a) Pump not properly primed;
b) Foot valve leaking;
c) Deep Well injector not installed below water level;
d) Suction lift too high;
e) Suction piping not correctly sealed or holed allowing air to enter pump
suction;
f) Blocked jet or venturi;
g) Piping connected in reverse, ie suction and pressure pipes transposed;
h) Motor thermal overload tripping - refer No 4;
i) Insufficient water supply at source;
j) Pressure system not switching on due to static delivery head causing higher
pressure on the pump than the pressure switch cut-in setting.
2. Pump not Operating at Minimum Operating Pressure for Deep Well injector
May be caused by air leaks in suction pipe or
ADR control not correctly set.
3. Motor not running
May be caused by one or more of the following:-
a) Power failure;
b) Blown fuse;
c) Motor overload tripping;
d) Motor windings faulty.
4. Motor Thermal Overload Tripping
May be caused by one or more of the following:-
a) Low voltage supply;
b) Motor or pump seized;
c) Motor windings faulty.
5. Pump Switching On and Off Frequently or When No Taps Turned On
May be caused by one or more of the following:-
a) Foot valve not retaining pressure or water;
b) Water leaking from suction or delivery piping;
c) Faulty ball valve in toilet cistern, hot water system, or stock troughs allowing
unit to over-flow;
d) Pressure tank not retaining air pressure or air charge too high;
e) Motor thermal overload tripping.