Davey SJ60-08PC Automatic Water Pressure System - Manual (Page 3)

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Power Connection
The pump motor is fitted with an earthed three pin plug & lead.
The installer is responsible for the correct connection of the electrical supply to the pump motor.
•
Make sure the supply voltage and frequency is the same as the nameplate.
• Make sure that there is a sound earth connection available.
In accordance with AS/NZS 60335.2.41 we are obliged to inform you that this pump is not to be used by children or infirm
persons and must not be used as a toy by children.
Electrical Power Surge Protection
An electrical power surge or spike can travel on the supply lines and cause serious damage to your electrical equipment.
The Presscontrol fitted to this pump has a metal oxide varistor (MOV) fitted to help protect it’s circuit. This MOV is a
“sacrificial” device, meaning that it effectively gradually destroys itself every time it takes a surge. The MOV is not a
lightning arrestor and may not protect the Presscontrol if lightning or a very powerful surge hits the pump unit.
If the installation is subject to electrical power surges or lightning we strongly recommend the use of a suitable surge
protection device on ALL electrical equipment.
Pipe Connections
For best performance use P.V.C. or polythene pipes at least the same diameter as the pumps inlet and delivery outlet
openings. Larger diameter pipe may be used to minimise resistance to flow when pumping longer distances.
Use unions as pipe connections to enable easy removal and servicing. Use sufficient tape to ensure airtight seal and
hand tighten only. To prevent strain on pump threads always support heavy inlet and outlet pipes. If there is a likelihood
the water supply may contain solid particles such as pieces of plant or vegetable matter, a suction strainer should be
installed before the pump to avoid blocking of the pump. Lay suction pipe at a constant gradient to avoid air pockets
which reduce pump efficiency.
Installations with a Suction Lift
Installations with a suction lift require a good quality foot valve to avoid loss of prime.
For model SJ35-04P2C/LOP the enclosed suction check valve can have a suction strainer fitted and used as a foot valve.
Installations with Flooded Suction
Installations with flooded suction require a gate valve so water supply can be turned off for pump removal and servicing.
Model SJ35-04P2C/LOP must have the enclosed suction check valve fitted with the enclosed nipple directly into the
pump inlet. Ensure the check valve is installed in the correct direction to allow flow into pump inlet.
NOTE - Suction leaks are the largest cause of poor pump performance and are difficult to detect. Ensure all
connections are completely sealed USING THREAD TAPE ONLY.
WARNING
DO NOT RUN DRY.
DO NOT RUN WITH LOSS OF PRIME.
DO NOT PUMP WATER CONTAINING ABRASIVE MATERIALS.
EARTH CONNECTION
The pump power lead includes an earth pin on the plug, which MUST be correctly connected to a suitable earth
on the electrical supply.
POWER CONNECTION
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.