8
WARNING
Do not operate this equipment if it has visible signs of significant physical damage other
than normal wear and tear.
Chapter 3: System Operation
CAUTION
Operating the equipment in any way other than that described within this document
could potentially damage the equipment.
CAUTION
Disconnect power source when not in use.
Double check 12V system positive and negative are not reversed at any connection
point.
Before turning the power switch “on” turn the Geocontrol PRO’s “Fill” and “Discharge”
timer knobs to adjust the cycle times. These knobs are located on the front face of the
Geocontrol Pro below the airline pressure gauge. To the left is Discharge time and to the
right is Fill time. Use the radial number scales around each timer knob to adjust timer
values in seconds.
Discharge Time:
The time it takes to squeeze the bladder and push the water out of the pump. Increase this
time with increased depth to water and larger bladder pumps. Decrease this time with lower
depth to water and smaller bladder pumps. Timer can be set from approximately 2 to 60
seconds.
Fill Time:
The time allowed for the bladder to refill. Increase this time with increased depth to water and
larger bladder pumps. Decrease this time with lower depth to water and smaller bladder
pumps. Timer can be set from approximately 2 to 60 seconds. Fill rate depends on
hydrostatic pressure (pressure from the water above the pump) and will vary depending on
pump placement within the water column. Therefore, the more water above the pump the
faster it will fill.
Turn the controller power switch ON. In case of long fluid discharge lines it could take
multiple cycles for water to reach the outlet. If the fluid discharge from the pump falls off
before the discharge cycle is complete, the discharge time is set too high. This could
result in a creased bladder that will reduce per cycle pump volumes. Therefore, if the
