Frequently Asked Questions: Constant Voltage Pump Drivers
What model are available?
Constant Voltage Pump Driver Models
How do they protect the pump from the well going dry?
- There are 2 methods of dry control. One is to use a dry switch hooked
to the dry switch
input to close when the well is dry. This type of switch is on the market
and is basically a floating ball in a cylinder.
- On the larger units, the main dry control is the current monitor on board. When the pump
runs dry,
it is no longer pumping water, hence the motor load drops and of course the motor current
drops with it. The unit senses the drop in current and turns off the pump motor for 20 minutes.
This protects the pump, and the 20 minute wait allows the well to refill with water.
After 20 minutes the pump turns on again and pumping continues.
Is there a float switch control to turn the unit off when the holding tank is full?
- Yes, both styles are supported. On the smaller unit, connecting the yellow wire to the black power
wire shuts the unit off. On the larger units,by moving the terminal block connection the pump
will turn off if the float switch closes, or it can be setup to turn off if the float switch
opens.
What if the battery goes low?
- These units have their own internal LVD (Low Voltage Disconnect) that shuts off the pump
if the battery voltage is too low. This is used to protect the battery from low discharge
damage.
Is the battery fused?
- The 12/24 V unit has a fused battery. The higher power units require an external
battery fuse.
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