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Read all instructions before Installing your
new Dynaflo Pump
1. INTRODUCTION
These instructions have been prepared to
acquaint you with the correct method of installing
and operating your Dynaflo pump. We urge you
to study this publication carefully and follow its
recommendations. In the event of installation
difficulties or the need for further advice you
should contact the Davey Dealer from whom you
purchased the unit.
Should you be unable to obtain the required advice
or resolve any problems through your local Davey
Dealer, please contact the Davey Customer Service
Centre. Contact details for these Offices are shown
at the back of these instructions.
For suitability of Dynaflo for pumping liquids other than
water, consult the Davey Customer Service Centre.
2. HOUSING YOUR Dynaflo
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.
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.
Your Dynaflo should be mounted on 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.
Failure to adequately house your Dynaflo, as
outlined above, will render your guarantee void.
3. SUCTION LIFT
For best performance and easiest priming, site the
pump as close to the water source as possible.
Optimum performance will be achieved on suction
heads (including friction) up to 4.5m (15 feet). The
maximum practical suction head (including friction)
for this type of pump is 7.5m (25 feet).
4. DELIVERY HEAD
Care should be taken to ensure that the combined
suction and delivery head (including pipe friction) of
the installed pump does not exceed the total head
shown in the pump performance tables against the
required capacity.
Never run this pump without
discharge flow for more than a few
minutes, as the water will heat and
cause damage to the pump or pipe
lines not covered by guarantee.
5. FOOT VALVE - CHECK VALVE
IMPORTANT: For installations which
may allow water to run back through
the pump after switching off (eg
overhead tank filling), a check valve
(non-return valve) must be installed
at the pump outlet to prevent water
cascading back through pump.
6. SUCTION PIPING
Suction lift is made up of the actual vertical height
from the water level below the pump to the pump
inlet port, plus the friction in the suction piping
and fittings.
For best performance and easiest
priming situate the pump as close to the water
source as possible.
Suction piping should be laid so there is a constant
rise from the water source to the pump. Any high
spots will cause air pockets to form and reduce the
efficiency of the system.
Do not allow the suction pipe to
lay in exposed sunlight if possible
as the water inside will heat up
during periods when the pump is
not operating. This will reduce the
suction capacity of the pump during
initial starting.
To reduce pipe friction and maximise flow we
recommend the use of pipe with equal or larger
diameter than the inlet on your pump. For detailed
recommendations regarding long suctions, please
contact your Davey Dealer or the Davey Customer
Service Centre on 1300 367 866.
NOTE: Suction leaks are THE biggest
cause of operating difficulties and are
hard to detect because the problem
is air leaking INTO the pipe and
there may be no external sign of the
leak. It is essential that all suction
connections are completely sealed,
using thread sealing tape only.
Do NOT screw connections too far into the pump’s
suction and delivery ports. Do not exceed tightening
force of 60ft lb (8.2kgm). i.e. 60lb force at the end of
1 foot wrench (25kg at 30 cm).
7. DELIVERY PIPING
Friction in the delivery increases the head on
the pump and so reduces capacity and pressure
available at the delivery point. To minimise
performance losses we recommend the use of
larger diameter pipe. For more detailed advice
concerning delivery heads and delivery piping,
please consult your local Davey Dealer or the
Davey Customer Service Centre on 1300 367 866.
