4
OPERATING INSTRUCTIONS
Suction and discharge pipes
:
To avoid air locks and make priming easy the suction pipe should be laid so that it rises
evenly from the water source to the pump. All pipe joints have to be sealed airtight and
they should be the same size or larger than the pump inlet and discharge outlet.
PRIMING
•
To prime the pump, remove the priming plug and fill pump and suction pipe with water.
Pump has a non-return valve and is capable of drawing air from the normal size suction
pipes and hoses. Replace plug and start pump. If it pumps a small amount then stops,
turn it off, check the suction pipe for leaks and repeat the priming procedure until the
pump works well.
•
When filled with water, self-priming pumps will gradually draw air from the suction line.
If priming a long or large diameter pipe, additional water may have to be added to the
pump at 3 minute intervals.
N.B. Do not run the pump dry of water for extended periods as it will destroy the
mechanical seal and void warranty.
HOW THE PUMP OPERATES
Before starting the pump, make sure the non-return valve is freely able to move. If the
pump fails to prime, there could be a problem with the suction pipe such as a leak, worn
impeller or too strong of a suction lift. Self-priming pumps will not self-prime with high
discharge head. If this is the case, the suction flap valve should be removed and a suction
foot valve installed on the hose.
SUCTION STRAINER
A suction hose strainer may be needed for portable pump use. This stops gravel or any large
debris getting into the pump and causing damage.
ENGINE
Engine user manual is enclosed. Using low speed extends the life of your engine. When
continually pumping, we recommend operation at approximately 3000rpm. In contrast,
high speed will increase the pump’s per
formance when needed as in fire fighting or intense
situations. However, be aware that pump life will eventually suffer if high speed is
continually applied.
