Water treatment controller for an evaporative condenser

Details Water treatment controller for an evaporative condenser Water treatment controller for an evaporative condenser

1992-01-23

1994-03-15

Hofsass, Jeff

Communications: electrical

Condition responsive indicating system

Specific condition

340603, 210696, 261DIG11, 137392, G08B 2100

Patent

active

052949168

ABSTRACT:
An apparatus controls the treatment of water that flows through a cooling system. The electrical conductivity of the water is sensed. A valve control opens a system drain valve when the sensed conductivity is greater than a threshold, and closes the drain valve when the conductivity drops below the threshold by a given amount. The water drained form the system is replenished through an inlet and a mechanism measures the volume of water added to the cooling system. Chemicals to treat the water are fed into the system when specified volumes of water have been added. The sensing of conductivity can be inhibited for a certain period following the application of the chemicals. A possible system malfunction is indicated when the conductivity does not drop below the threshold after the drain valve is open for a given period of time.

REFERENCES:
patent: 4797666 (1989-01-01), Baxter et al.
patent: 5145585 (1992-09-01), Coke
Brochure for the Lakewood Instruments Model 170 Series Timer/Conductivity Control.
Lakewood Instruments brochure for the Model 63, 63-DT-A Biocide Timer.
Brochure for the Model 65 Clock Timer from Lakewood Instruments.
Brochure for the Model 1400 Microprocessor Controlled Chemical Feed System by Lakewood Instruments.
Specification of the System T-4-A from Morr Control, Inc.
Brochure describing the Morr Control System H cooling tower controller.
The Morr Control System Z brochure, Sep. 1986.

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