Abstract: Various systems and methods are provided for controlling a water pressure booster pump to (1) change operation during a future time period that may repeat on a weekly basis, (2) enter a sleep mode in response to no or low demand, (3) require a user to perform an unlock sequence to exit sleep mode, (4) preventing access to configure operating parameters of a pump until a user enters a password, (5) and configure a network of pumps for coordinated operation.

Abstract: A method of controlling a motor in a liquid system is provided, comprising: controlling an operating frequency of the motor to cause a pump to maintain an actual pressure of liquid in the liquid system at or near a first pressure; determining whether a first timer has elapsed during the controlling step; responding to a determination that the first timer has elapsed by initiating a sleep mode determination, comprising: ramping the operating frequency to a low frequency; determining whether the actual pressure remains above a second pressure which is less than the first pressure for a second timer; and responding to the actual pressure remaining above the second pressure for the second timer by causing the motor to enter a sleep mode.

Abstract: A controller for a fluid treatment control valve having a valve body with a seal stack positioned therein is provided. The controller includes a front housing, a rear housing removably connected to the front housing to define a substantially enclosed volume, a gear box mounted within the substantially enclosed volume, and a circuit board assembly mounted within the substantially enclosed volume. The rear housing includes a first pair of retention elements configured to mate with a corresponding second pair of retention elements on the valve body to mount the controller to the valve body.

Abstract: A water treatment device, comprising: a controller operably connected to a tank containing a water softening resin; a sensor in communication with the controller and configured to provide date for determining a treatment capacity of the water softening resin and for determining a quantity of water treated by the water softening resin; and a valve configured to pass water to be treated through the water softening resin; wherein the controller is configured to monitor a remaining treatment capacity of the water softening resin by subtracting the quantity of water treated by the water softening resin from the treatment capacity of the water softening resin; and wherein the controller is configured to record the remaining treatment capacity, as a negative value, when the quantity of water treated by the water softening resin exceeds the treatment capacity of the water softening resin.

Abstract: A controller for a fluid treatment control valve having a valve body with a seal stack positioned therein is provided. The controller includes a front housing, a rear housing removably connected to the front housing to define a substantially enclosed volume, a gear box mounted within the substantially enclosed volume, and a circuit board assembly mounted within the substantially enclosed volume. The rear housing includes a first pair of retention elements configured to mate with a corresponding second pair of retention elements on the valve body to mount the controller to the valve body.

Abstract: A method to detect gulping in a pump driven by a motor drive to pump a liquid includes: determining a value of a work indicator corresponding to work performed by a pump pumping a liquid; comparing the value to a first threshold; changing a value of a tracking variable by a first amount if the value of the work indicator is below the threshold; changing the value of the tracking variable by a second amount if the value of the work indicator is above the threshold, wherein the first amount and the second amount have opposite signs; and determining that a gulping event occurred if an absolute value of the tracking variable is larger than an absolute value of a second threshold.

Abstract: A load protection system and a method of protecting a load. The load protection system includes a PLC transmitter module and a PLC receiver module, which are configured to communicate a plurality of bits of data, each bit transmitted near a zero-crossing of a voltage on the power lines supplying power to the load, in the form of a high frequency burst of pulses. The pulses are structured in two patterns. The first pattern serves to identify the start of the second pattern, and the second pattern includes the data. The first pattern is unique and not represented within the second pattern. The load may be a motor, and the data may include a parameter value representing a parameter of the motor.

Abstract: A method to detect gulping in a pump driven by a motor drive to pump a liquid includes: determining a value of a work indicator corresponding to work performed by a pump pumping a liquid; comparing the value to a first threshold; changing a value of a tracking variable by a first amount if the value of the work indicator is below the threshold; changing the value of the tracking variable by a second amount if the value of the work indicator is above the threshold, wherein the first amount and the second amount have opposite signs; and determining that a gulping event occurred if an absolute value of the tracking variable is larger than an absolute value of a second threshold.

Abstract: A load protection system and a method of protecting a load. The load protection system includes a PLC transmitter module and a PLC receiver module, which are configured to communicate a plurality of bits of data, each bit transmitted near a zero-crossing of a voltage on the power lines supplying power to the load, in the form of a high frequency burst of pulses. The pulses are structured in two patterns. The first pattern serves to identify the start of the second pattern, and the second pattern includes the data. The first pattern is unique and not represented within the second pattern. The load may be a motor, and the data may include a parameter value representing a parameter of the motor.

Abstract: A load protection system and a method of protecting a load. The load protection system includes a PLC transmitter and a PLC receiver, which are configured to communicate a plurality of bits of data, each bit transmitted near a zero-crossing of a voltage on the power lines supplying power to the load, in the form of a high frequency burst of pulses. The pulses are structured in two patterns. The first pattern serves to identify the start of the second pattern, and the second pattern includes the data. The first pattern is unique and not represented within the second pattern. The load may be a motor, and the data may include a parameter value representing a parameter of the motor. A motor controller may evaluate the parameter value to determine whether to institute a warning or alert action, to shut the motor down, or to continue operating.

Abstract: A control system for a cooling system utilizing a two-phase refrigerant includes a cooling distribution unit (CDU) having a CDU refrigerant supply line for supplying the refrigerant to at least one evaporator, and a CDU two-phase return line for returning the refrigerant to the CDU. A controller is operatively coupled to the CDU, the controller including a first control loop configured to maintain a constant pressure differential across the CDU refrigerant supply line and the CDU two-phase return line.