4
5 Installation
5.1 General
WARNING – All electrical connections
should be performed by a qualified
experts only!
Please make sure that the electrical installation has a dis-
connecting device, which allows disconnecting from the
power supply with a minimum of 3 mm contact gap at each
pole. This pump is built according to Protection Class 1.
WARNING – The ambient temperature
must not exceed max. 50°C.
5.1 Filtering
WARNING – Your pump is a PRECISION
MACHINE. Traces of sand, clay, rust or
other solids will cause rapid wear or
immediate damage.
lf your water is CRYSTAL CLEAR ALL THE TIME, our fine in-
take strainer will provide sufficient protection. lf you have
an intake strainer already, it is probably not fine enough -
openings must be no more than several hairs wide -, or ad-
ditional filtration is required. Since water conditions are
subject to change, it is good insurance to use a filter re-
gardless.
A 30 INCH INTAKE FILTER/FOOT VALVE is necessary for
pumps lowered into wells. Otherwise a INLINE FILTER is
best, installed close to the pump’s intake. lf filters are ex-
pected to clog often, maintenance may be minimized by
plumbing two or more filters in parallell The INLINE FILTER
has a clear bowl so its condition may be observed.
CAUTION – KEEP SPARE CARTRIDGES
HANDY!
Filter cartridges are available from your dealer or the
factory. 9 7/8 inch cartridges for the INLINE filter may
also be obtained from local water system suppliers. The
10-20-micron “spun polypropylene” type is best. Paper fil-
ters have less capacity. The kind that looks like string has
more resistance to flow. Carbon taste and odor cartridges
have less capacity for dirt, more resistance to flow, and cost
more. Use them only if you have, taste and odor problems.
A filter cartridge may look clean and still be clogged, due
to fine silt embedded in the fibers. If the pump, becomes in-
creasingly noisy over time, it is usually due to a clogging fil-
ter cartridge. On the other hand, a cartridge that looks dis-
coloured may not be clogged, as long as your pump runs
quietly, the filter is OK. Use pump noise to indicate the
need to change cartridges.
Iron pipes or fittings will introduce abrasive rust parti-
cles if installed on the intake side of the pump (they rust,
every if galvanized). Pipe that is dirty inside (even new
pipe) or has mineral deposits in it will also introduce dirt.
Dirt is introduced as pipe joints are assembled, especial-
ly in a trench.
CAUTION – Make sure inlet lines and
fittings are FLUSHED CLEAN before
hooking up to pump.
The INLINE FILTER may have a red push button valve to re-
lease pressure for maintenance. If filter is placed more than
a few feet higher than water source (at lowest level) the
suction may pull the valve open and introduce air. Prevent
this by sealing around the push button with silicone sealant
or epoxy, or replace the button with a nut, tightened down.
5.2 Plumbing Design
WARNING – New pumps are packed with
foam plugs to prevent contamination.
REMOVE FOAM PLUGS BEFORE CON-
NECTING PIPES.
HANDLE YOUR PUMP CAREFULLY! Never
hammer on it, clamp it in a vice or drop
it.
Minimize suction lift to max. 3 m total pressure loss (2 m
for pumps with flow rate greater than 400 l/h). The practi-
cal suction limit for any pump is 6 m (20 vertical ft) at sea
level (subtract 0.3 m/1 ft for every 300 m/1,000 ft of eleva-
tion). The more you minimize suction lift, the more relia-
ble and quiet your pump will be. Just be sure the motor will
not be submerged if the water level rises, or it will be ru-
ined. Your pump may be placed downhill from your water
source, if feasible.
Intake Pipe The intake pipe may run any reasonable hor-
izontal distance, although it is best to keep it short. Use
large pipe for the intake (1 to 1 ½” for larger booster
pumps). Slope the intake line from the water source UP to-
ward the pump. Avoid humps in the intake line. They trap
air pockets which can block the flow.
CAUTION – Avoid leaks in suction line.
Otherwise the pump will prime insuffi-
ciently or not at all. Leaks in the suction
line are hard to locate and will cause
constant problems.
The intake pipe must be sized generously to allow no
more than a slight pressure drop at peak flow rate, or
pump will be noisy and will wear rapidly.
Use pipe reducer fittings to adapt your pump’s inlet or out-
let to larger pipe size where necessary. Excessive pipe siz-
ing will do no harm.
WARNING – Intake must not be restricted
by undersized pipe, excessive suction lift,
or a clogged filter.
WARNING – Excessive suction at the
pump intake causes cavitation (forma-
tion and implosion of vapor bubbles).
This causes very loud buzzing noise and
radid pump wear. A slight buzzing noise
is acceptable, if it cannot be avoided.
CAUTION – Do not use thin wall hose or
soft tubing on the pump’s intake. It may
collapse under suction and restrict the
flow.
CAUTION – Do not use polyethylene pipe
(black flexible) for the suction either. It is
prone to slight leakage at the fitting.
Inline filter should be mounted HORIZONTALLY and as
low as possible. This prevents any air trapped in it from
blocking the water flow. Be sure to leave some space be-
low it for a pan, to catch water when replacing the filter
cartridge.
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