
Installation
•The pump shaft should be horizontal. A shaft that is
vertical will cause premature pump failure.
•Observe POLARITY! The red wire must be connected
to the positive side of the power supply, and the black
wire to the negative. Reversing polarity will
IMMEDIATELY DESTROY the electronics in the
pump
•Keep the outside of the pump body dry, and install
such that moisture does not enter the electronics
enclosure. Moisture in the electronics will quickly
destroy the pump.
•Do not allow water inside the pump to freeze. The
expansion of the ice will crack the pump housing
•There is a powerful magnet inside the pump. If your
water contains small particles of iron or other
magnetic materials they will eventually collect on the
magnet and prevent the pump from operating at full
efficiency.
•The pump will not work if it has air in it. Also it cannot
prime itself. For initial operation thoroughly purge the
system of all air.
Power Settings
This pump supports 4 different power settings as well as
full MPPT mode.
It can be operated from a battery (12V or 24V) or any
other DC source at all power settings. Please make sure
your source has enough power to supply the setting you
choose. Do Not use MPPT when connecting to a fixed DC
supply.
For direct connection to a PV panel (without battery or
charge controller) you can use MPPT mode or fixed
power mode. In MPPT mode the pump will seek to
optimize its power, constantly adapting to the
characteristics of the PV panel and the amount of
sunlight. In fixed power mode it will draw the amount of
power from the panel corresponding to the setting. In this
mode your panel must have enough power to support the
setting. It is possible to use a large PV panel (over 25W)
as long as the open circuit voltage is below 26V. If your
PV panel has a higher open circuit voltage the pump may
shut itself down.
Selector
Setting Power
Current
with
12VDC
Supply
Current
with
24VDC
Supply
Min. PV
Panel
Rating
1-1 5W 420 mA 210 mA 5W
2-2 10W 840 mA 420 mA 10W
3-3 15W 1.3 A 630 mA 15W
4-4 25W 2.1 A 1.1 A 25W
5-5 MPPT N/A N/A 5W
Startup Hints
•Make sure the system is purged of all air.
Sometimes small bubbles will remain in the pump and
cause noisy operation. Turning the pump off and on
several times will usually purge the bubbles out of the
pump.
•If you are running the pump from a PV panel it will
take some time before the pump starts in the morning.
PV panels will not produce enough power to run the
pump until they receive full sun.
Troubleshooting
Symptom Cause Solution
Noisy
operation
Air bubbles in the
pump,
Running Dry
Purge the air
from the pump
Pump runs
intermittently
dry running
protection active
purge air from
pump
overtemperature
protection active
wait until pump
cools down
Pump won't
run
Incorrect polarity complete
replacement
moisture in
electronics
input power
insufficient
provide
specified power
supply
dirt in the pump clean inside of
pump housing
Imported by HELIATOS SOLAR
Hybrid Solar Water Heating Systems
www.heliatos.com
661 7SOLAR7