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10 WATER LEVEL AND
FLOW CONTROL
FLOAT SWITCHES/WATER LEVEL SENSORS: These
are devices that sense high or low water level and
switch your pump on and off . FLOAT CONTROL IN
WATER SOURCE may be used if dropping water level
is causing dry run or excessive suction (noise due to
cavitation).
In case the pump sucks water from a shallow well,
connect our well probe sensor (article #1658) to
terminal 1-2 in the pump controller. There is a 20 min
time delay to restart the pump once the well was dry.
The well dry LED will light up and once the pump has
restarted it will slowly flash to indicate that the well was
dry before.
FLOAT CONTROL IN STORAGE TANK may be used to
turn pump off when tank fills. This eliminates tank
overflow and reduces pump wear and filter changing.
Small wire buried from tank/float switch to pump
controller. ( Connect to Terminal 4-5 for NC type switch),
there is no time delay for restarting.
Or a Float valve in tank restricts flow. Pressure builds
up and actuates pressure switch at pump. Small
captive air pressure tank is necessary at pump to
prevent "switch chatter".
Contact your dealer or the factory for further advice.
FLOW RESTRICTION MUST NOT BE USED as a method
to reduce your pump's flow rate. It may result in exces-
sive pressure build up and current draw. Use the
controllers RPM knop to adjust the flow rate.
Maintenance
Access
Overflow
Pipe
Float Switch
Fee Pipe
from
Well Pump
PS150 BOOST Pump
Installation: From
cistern or storage tank,
where pump must be
higher than source.
12
11 PRESSURIZING
SYSTEMS
A PRESSURE TANK IS REQUIRED with a Booster Pump
system. PRESSURE TANKS are available from local
water supply dealers. Use the largest tank you are
willing to buy. 150l/40 US_gal. size is typical; it allows
you about 45l/12 US-gal. of water between pump
cycles. Those 45l/12 US-gal. may be drawn at a higher
flow rate than the pump produces. A large pressure
tank will minimize on/off cycling of the pump. In a typical
household of more than four people, a tank of at least
230l/60 US-gal. is recommended. The bigger the
better! More than one tank may be connected. They
need not be the same size.
A PRE CHARGED "CAPTIVE AIR" TANK is recom-
mended. Cheaper "galvanized tanks" require periodic
recharging, store less water between cycles, and don't
last as long. PROPER PRE CHARGE IS ESSENTIAL to
proper operation. Follow the instructions that come with
your pressure tank. (With pressure discharged from the
tank, adjust pre--charge to about 0.2 bar/2 PSI below
cut in pressure.) This is very important.
PRESSURE SWITCH ADJUSTMENT: Switch settings
determine the pressure range of your system. To
conserve energy, set the pressure as LOW as feasible.
This will also prevent the motor from overheating if you
run it for long periods sprinkling, for example. Low
pressure (even 1-1.5 bar/15-20 PSI) may deliver
excellent water flow IF your plumbing and hoses are
sized larger than minimum. lf not yet plumbed, use at
least one size larger pipe than conventional, and avoid
restrictive connections such as 3/8" tubing often used
to feed sinks.
Air Vent and
Adjustment: Start with the standard setting (usually 2.0/
Dipstick Access
3.5 bar respectively 30/50 PSI). Reduce the pressure
according to your requirements, if you wish. It is wise to
measure the current used by your pump (with an amp
meter in series with the line, your system metering).
Current draw will rise in direct proportion to outlet
pressure. Pressure should NOT be set beyond 4.5 bar/
Suction
Foot Valve
Pipe
Priming
Plug
Inline
Filter
PS150 BOOST
Pressure Tank
Pressure
Switch
Check
To House
Valve
Plumbing
Pressure
Hose
Relief
Bib
Valve
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