Flowlight Booster Pump Instruction Manual

11
SOLAR SLOWPUMP — POWER CONTROL for
ARRAY-DIRECT (NON-BATTERY) OPERATION
When working against a constant head (vertical lift) Solar Slowpump requires nearly constant
current, regardless of the voltage/speed. When low light conditions are present, the PV array
cannot supply full current. The voltage will drop to nearly zero, and the pump will “stall” (like a
truck trying to start in 4th gear). The remedy is either to add a PUMP CONTROLLER, also
called LINEAR CURRENT BOOSTER (LCB) to your system. This device will match the power
source to the load by transforming the voltage down while increasing the current delivered to the
motor (like an automatic transmission). If you are not using a controller in your non-battery
system, contact your dealer. It will greatly improve low-light performance.
Remote Tank Float Switch: See
y
our controller instructions. Float switch
must MAKE contact on rise, to turn the
p
um
p
OFF. This is o
pp
osite of
normal action, so
y
our float switch ma
y
be labeled “
p
um
p
down to em
p
t
y
”.
System Wiring for Typical Slowpump Installation
-- Non-battery System --
Earth
Ground
Controller
(LCB)
-
-
+
+
Installing a Solar Tracker? Use stranded
wire for flexibility. Secure the wires to
tracker with plenty of tape.
Make a long
slack loop to allow free motion of tracker.
“Series” Wiring is shown, for nominal 24V
system: Voltage from panels will read 40V
when disconnected (open circuit), and
about 30V while pumping.
For 12 Volts, use a single panel, or wire
panels in parallel (+ to +, - to -).
•
••
•
••
on
off
for backu
p
p
ower or testin
g
usin
g
a batter
y
,
hook jumper wires
here , not to controller input.
Pump
The proper fuse must be
i nserted inside the LCB to
protect the pump from
overload.
PV
Array