Davey Sump Pump D42, D53 - Manual (Page 2)

Installation & Operating Instructions
The Davey range of Submersible Sump Pumps are suitable for small to medium Dewatering (or recirculating) applications.
Vortex models are suitable for pumping small soft solids in fluid suspension. The multi impeller D42 & D53 models are
designed for clean water only.
They are extremely quiet in operation which makes them ideal for applications within residential areas for sullage pits,
waterfalls and general drainage.
Other Ideal Applications are:
Lift Wells, Car Park Sumps, Basements, Cable Pits, etc.
This Submersible pump has been factory checked prior to delivery; however, please check for any damage during transport.
After Sales Service is available from Davey or Special Davey Authorised Service Dealers.
Suitable Fluids
This pump is designed to pump waste water, clean water and water containing mild pollutants at ambient temperatures. It
is not suitable for pumping flammable or corrosive fluids, nor fluids at elevated temperatures. If you are unsure as to the
suitability of the fluids, contact your Davey dealer for advice.
The multi impeller D42 & D53 are designed for clean water only.
Installation
This Davey pump is completely submersible up to 10 metres and should be placed on a solid flat surface (if not available, sit
the pump on timber or house bricks) in the vertical position. Pump should always be installed so that it will be clear of settled
silt or debris. It is recommended to fit the biggest diameter hose possible, to obtain the best flow from the pump. To remove
or lift the pump from deep wells or pits connect a rope to the handle during installation. Automatic versions should be placed
in a sump which has adequate dimensions so as not to restrict the movement of the float switch.
Automatic controlled pump units have float switches factory set to provide the correct high (ON) and low (OFF) liquid levels.
Motor Cooling
All models rely upon water flow around the motor shell for correct motor cooling. DC & RS models have a double case which
forces water around the motor. These models are therefore suitable to operate partially submerged.
All models other than the double case models are suitable for partially submerged operation only for short periods up to 10
minutes.
Where the pump (other than double case models) is required to operate for longer than 10 minutes partially submerged, or
where water flow over the motor may not be assured, it is advisable to direct a low flow (2-3lpm) cooling jet of water over the
motor shell (eg. when installed in large tanks or ponds).
Power Connection
A power connection point should be provided by a qualified electrician, in compliance with the requirements of AS 3000
(1991). Single phase models are rated for 220/250 Volts, 50Hz operation, and may be connected to a standard 10 amp
power outlet.
All single phase models have automatic reset thermal overload protection built in, ie. should overload on motor cause
thermal to open circuit and switch motor off, it will automatically reset and switch the motor on when the motor has cooled
down sufficiently, usually within a few minutes.
Fault Checks
(A) Pump will not start:
(1) Manual Type
 Check to ensure power is available and the outlet is switched ON.
 Blown fuse or tripped circuit breaker (replace/reset or call an electrician).
 If an extension lead is fitted, check connection.
 Impeller jammed - disconnect from power supply, and ensure impeller is free to rotate.
 Thermal cut-out switch has not reset (wait 5 minutes).
 If pump does not start from new then the seal has possibly stuck due to the length of time it has been standing
since it was manufactured. In this case, disconnect from power supply, remove bottom strainer and turn the
impeller nut clockwise, this will release the initial friction on the seal and once the power is connected will allow
the pump to work.
(2) Auto Type (with float switch)
 Check all in (1) above.
 Float switch jammed against sump side wall.
 Insufficient liquid to place the float switch in the ON position, i.e. higher than the horizontal.
(B) Pump runs, but does not pump water or pumps insufficient water:
 Insufficient liquid in sump.
 Strainer, impeller and/or discharge pipework blocked.
 Impeller damaged.
 Air lock in discharge pipework. Ensure pump is filled with water.
 Excessive back pressure or lift.
(C) Pump will not stop:
(1) Manual Type

Must be switched off at the power supply.
(2) Auto Type (with float switch)
 Float switch is prevented from moving to the fully down position.
 Float switch may be faulty.
(D) Pump runs for short periods only (the overload protection has tripped):
 Some foreign body is clogging the impeller.
 The liquid temperature is too high.
 Pump operating in non submerged position or with no water movement around motor (not applicable to DC10).
 Electrical fault.
Do not run the pump dry as this will damage the seal and reduce the life of the pump.
Where hair, lint or other string-like material may be in the water, the pump should be regularly checked. It might become
necessary sometimes to clean the suction strainer, impeller and/or discharge pipework.
With simple cleaning and regular examination this pump should give reliable service.
DO NOT:
Run the pump dry.
Attempt electrical repairs, unless qualified to do so.
Run the pump with the motor fully exposed for long periods.
Install the pump on soft or loose ground.
Operate the pump if the inlet is submersed by sand or debris.
Lift or carry the pump by the power cable.
This pump is not a slurry pump, it is not designed to pump hard solids (eg stones) nor fluids containing excessive
amounts of abrasive materials.
NOTE:
1. Long extension leads should be avoided as they often have insufficient current carrying capacity
to run electric motors, hence they can cause substantial voltage drop and operating problems.
2. Minimum voltage at the electric motor must not fall below 216 Volts for single phase, otherwise mo-
tor damage may result which is not claimable under guarantee.
3. If the electrical fittings in your country make it necessary to remove the plug (where fitted) from the
lead fitted 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 should be undertaken by a suitably qualified
person.
4. Expansion and contraction inside the motor due to heating and cooling is vented via the lead. The
lead end must never be sealed off, but must always be open to the atmosphere.
5. ALWAYS disconnect pump from power supply prior to commencing ANY maintenance or
adjustment.
NOTE:
If fitting an extension lead a QUALIFIED ELECTRICIAN should be consulted to ensure correct rating is provided.
Extension leads are not allowed for permanent installations.
Not intended to be used for swimming pool. Note that these pumps may be used for the repair or maintenance of
swimming pools, but never with people present in the water.
NOTE:
If the cord is damaged, the appliance should be repaired by a qualified Davey Service Centre. The supply cord
must only be replaced by a suitably qualified person with a genuine Davey replacement supply cord.