drain plug at the bottom of the pump.
Safety in case of leakage: A worn shaft seal will cause water leakage. Install the pump
so that water leakage will not submerge the pump or cause damage to the surroundings.
Overload Protection
Electrical overload can be caused by large debris or a mechanical fault in your pump or by
an electrical fault in the motor or in your wiring. If protection is not provided, this can cause
damage to your motor or other parts of your power system, including fire hazard. A circuit
breaker or fuse is the electrical “safety valve” that prevents such damage.
WARNING: Failure to install the required fuse or
circuit breaker will void your warranty.
Amp rating of fuse or breaker: Ampere rating = amps at the pump + 15-25%. Refer to
the performance chart for amps at the pump for your application.
Breakers: Most AC breakers cannot be used for DC circuits. Square-D
®
QO or QB-Series
breakers are an exception. They are UL-listed for low voltage DC systems up to 24V
nominal. They are commonly available at electric supply stores.
Fuses: Plastic plug-type automotive fuses are good for 24V nominal, 30 Amp Max. Paper
cartridge type FRN-R time-delay fuses are available for 30 amp maximum and are rated to
120VDC. A standard AC single-phase fused disconnect switch can be obtained to hold FRN
fuses. Do not use the small glass type of fuse. Keep spare fuses nearby. DO NOT substitute
a larger fuse to solve a problem. Place the fuse or breaker close to the power source, rather
than at the motor, so that it protects against both wiring and motor faults.
Wire Sizing
Wire of sufficient size should be used to keep voltage drop to less than 3%. Greater voltage
drop has a disproportionate effect on the performance of the pump, and can result in little or
no water reaching the outlet. Please consult a wire sizing chart that is appropriate for the
voltage of your system. Your Dankoff Solar Pump supplier can obtain this chart for you.
Direction of Rotation
The pump must run in direction of the arrow on the pump case (counterclockwise when
facing the pump intake). The direction of rotation is determined by the polarity of the
electrical connection to the motor. Check for proper direction of rotation by observing the
motor shaft when power is first applied. Reversal of the polarity (direction) for a few minutes
will not cause any damage.
