9
8 Pressurising Systems
A PRESSURE TANK IS REQUIRED with a boost-
er pump system. Pressure tanks are available from lo-
cal water supply dealers. Use the largest tank you are will-
ing to buy. 150 l/40 US-gal. size is typical; it allows you
about 45 l/12 US-gal. of water between pump cycles. Those
45 l/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 230 l/60 US-gal. is recom-
mended. More than one tank may be connected. They need
not be the same size.
A PRECHARGED “CAPTIVE AIR” TANK is recommend-
ed. Cheaper “galvanized tanks” require periodic recharg-
ing, store less water between cycles, and do not last as
long. PROPER PRECHARGE IS ESSENTIAL to proper opera-
tion. 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.)
PRESSURE SWITCH ADJUSTMENT Switch settings de-
termine 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 con-
ventional, and avoid restrictive connections such as 3/8”
tubing often used to feed sinks.
Adjustment Start with the standard setting (usual-
ly 2.0/3.5 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 me-
ter in series with the line, your system metering). Current
draw will rise in direct proportion to outlet pressure.
CAUTION – Pressure should NOT be set
beyond 4.5 bar/50 PSI maximum or loss
of efficiency and motor over heating will
result.
CAUTION – After any change to your cut
in pressure, you need to readjust the
pressure tank precharge.
lf you are raising water vertically AND pressurizing. Exam-
ple: A pump that lifts 3 m/10 vertical feet and pressurizes to
2.1 bar/30 PSI must pump a total of 2.4 bar/35 PSI.
Total lift = vertical distance from water surface to pres-
sure tank.
INSTALL THE PRESSURE RELIEF VALVE near your pres-
sure tank. Run a pipe or hose from its outlet to a drain or
drain pipe or to the outdoors where water can drain away
safely.
A GATE VALVE and DRAIN VALVE are recommended for
convenience during system shut down. The drain valve is
simply a garden hose outlet which allows easy draining of
the system. It also allows water delivery by hose while wa-
ter is shut off to the house during installation or repairs to
plumbing.
INSTALLATION KIT IS AVAILABLE lf you have not yet
purchased the small parts you need to install your booster
pump, you can save time and confusion by purchasing our
convenient parts kit. All components are selected for maxi-
mum quality and convenience.
Pressure Switch Wiring
1
4 5
2 3
1. Connect to Float switch terminal 4 of PS Controller
2. Connect to float switch terminal 5 or 3 depending of
NC or NO function
3. Setting of cut-in pressure
4. Earth terminals
5. Setting of pressure differential
Pressure Setting
1. Completely release nut for setting of differential (5).
2. Adjust nut (3) until required cut-in pressure is ob-
tained.
3. Tighten nut (5) until required cut-out pressure is ob-
tained.
CAUTION – You need a pressure gauge to
find the right setpoints for your
application.
You can also use the pressure switch to switch the main
power supply of the pump. But the recommendet way is to
avoid any switch power losses and to use the float switch
terminals of the PS controller to start and stop the pump
WARNING – INSTALL THE PRESSURE
RELIEF VALVE INCLUDED WITH YOUR
PUMP! Some PS150 BOOST pumps for
city water pressure systems are supplied
with a 6 bar/85 PSI pressure relief valve as a safety
feature. lf your pressure switch fails, EXCESSIVE
PRESSURE may cause your tank of piping to burst
and flood your home.
priming plug
inline filter
PS150 Boost
pressure
relief
valve
hose
bib
pressure
switch
pressure tank
to
house
plumbing
check
valve
To Next Page
Loading...
Need help?
General
