Owner`s manual

10 Owner’s Manual
Voltmaster Centrifugal Trash Pumps
■ Before operating, ensure pump is on a firm, flat, level surface.
■ If pump is located next to a pit or hole, ensure pump is anchored so
that it cannot fall in.
■ Locate pump as close to the level of the fluid to be pumped, but
never higher than 25 feet (7.5m) above fluid surface.
■ Keep hoses and piping straight and as short as possible, avoiding
sharp bends.
■ If hoses must be laid across a roadway, protect it with planking.
Instantaneous shutoff pressure, applied when a vehicle runs over an
unprotected hose, will cause “hydraulic shock” and may damage
the pump.
■ If the discharge line runs vertically more than 30 feet (9m), it is
advisable to install a check valve in the discharge line, near the
pump, to stop destructive liquid hammer when the pump is shut
down.
❑ If a check valve is installed, it may be necessary to vent the top
of the pump so that air can be expelled during automatic
priming. This can be accomplished by providing a 1/4-inch
(0.5cm) line from the top of the pump back to the fluid source.
❑ If a check valve is not installed, the manufacturer cannot
assume responsibility for damage to the pump due to
destructive liquid hammer.
3.1.3 Installation
1. Install a suction strainer at the suction hose or pipe:
■ A strainer is provided with holes or slots small enough to
prevent larger particulate matter from entering and damaging
the pump. The strainer should be installed into the suction end
of the line, before piping enters the pump.
■ The strainer should be positioned so it will remain completely
under water. Running the pump with the strainer above water
for long periods can damage the pump.
■ If possible, suspend the strainer to keep it from working into
the sediment. Alternatively, set the strainer on a bed of stones
or tie it inside a basket or pail.
■ During operation, the strainer should be kept clean to optimize
flow.