12/06/99
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Remote Switch
The Remote Switch interface can serve as an automatic system shutdown when used with a water
storage tank mounted float switch. It can also serve as a manual system shutdown with a remote
system ON/OFF toggle switch. The majority of installations will use this port for float switch
interface. Both applications are configured and operate the same way. Please refer to the
following operational scenarios for configuration options.
With switch number 5 in the OFF position, the controller is configured to accommodate a Normally
Open (N.O.) float switch or remote toggle switch. In this configuration the controller will operate as
follows:
PUMP ON
float switch open = water tank low = pump ON
PUMP OFF
float switch closed = water tank high = pump OFF
With switch number 5 in the ON position, the controller is configured to accommodate a Normally
Closed (N.C.) float switch or remote toggle switch. In this configuration the
controller will operate as follows:
PUMP ON
float switch closed = water tank low = pump ON
PUMP OFF
float switch open = water tank high = pump OFF
Water Level Electrodes
The water level electrodes interface serve as an automatic system shutdown when properly
installed and configured. The PCA series of controllers are capable of two configurations; high or
low level shutdown. The high level shutdown is typically used to interface with a water storage
tank to achieve the same system control results as a float switch. The low-level shutdown is
intended to monitor the well water level and shutdown the system if the water level in the well
drops to a critical point.
To use this interface, three E-1s brass electrodes must be used. One is for the ground (reference)
, the second is for the low-level point and the third is for the high level point. Please refer to the
system wiring diagrams and the following operation scenarios for configuration options.
With switch number 6 in the OFF position, the controller is configured to interface with electrode
water level sensors for a water level HIGH pump shutdown and a LOW water level pump
activation.
PUMP ON
low and high level electrode exposed = water tank low = pump ON
PUMP OFF
low and high level electrode submerged = water tank high = pump OFF
