BW SOLAR Waterboy, Installation Manual

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10
Speed Adjustment
The speed control dial is used to reduce the flow of water produced by the pump, 0 – OFF, 10 – full
speed.
As some bores or wells recharge (refill) at a slower rate than the pump can discharge, it is common
for pumps to constantly switch on and off with the low water probe throughout the day. This cycling
can cause damage to your pump, and reduce your daily water output, due to the time wasted
switching back on. In these cases it is sometimes desirable to slow the pump down and pump all day.
By observing the system when it is pumping at its greatest rate during the middle of a clear summer
day, you will be able to see whether the bore is able to keep up with the pump output. If the pump is
shutting off on “low level” more often than you would like, even with the time delay being used, you
may wish to reduce the speed of the motor. Just turn the speed control knob down by twisting it,
counter clockwise, a small amount. This will lengthen the time between the shut-offs. Continue
reducing the speed in small stages until you are satisfied with the compromise between the flow rate
and the amount of time that the pump shuts off on “low level”.
NOTE: It is recommended that the speed not be reduced below 50% as this can cause low power
issues for the controller, if less flow is required then revise your system needs or bleed off some flow
back to the source.
Timer
The timer adjustment dial is used to extend the time it takes for the pump to wait before switching
back on after the low water probe is activated, 0 – instant back on, 30 – 30 min delay.
The tank full circuit has no time delay and is instantly back on after the circuit is open again.
Although the water level sensor protects the pump from running dry, it is possible that the system
could cycle on and off rapidly during peak sun hours when the pump gives its greatest output. By using
the low level timer delay knob in the controller, it is possible to delay the pump from restarting as
soon as the water level recovers. This prevents the rapid cycling of on and off but may mean that your
daily flow rate is lowered as you miss some of those peak sun hours.