The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. A poultry chiller, comprising: a tank having a conveyor within the interior for urging poultry for movement along the tank, wherein the tank has an opening extending along a length of the tank; and a cleaning system for automatically cleaning the interior of the tank, the cleaning system comprising a plurality of distribution nozzles extending along the tank to direct cleaning fluid to the interior surface of the tank; a cleaning fluid reservoir, a recirculation pump having a pump inlet connected to a reservoir outlet and a recirculation pump outlet is switchable to a heat exchanger and a plurality of distribution nozzles on the tank, and further comprising a programmable logic controller having a non-transitory computer readable medium having instructions stored thereon to control the recirculation pump, wherein the instructions execute the following steps: controlling the outlet from the recirculation pump to bypass the heat exchanger to discharge the recirculation pump outlet to the distribution nozzles, with the recirculation pump, pumping cleaning fluid from the reservoir to the distribution nozzles, and with the recirculation pump, pumping the cleaning fluid into the tank through the distribution nozzles, wherein after injecting, the cleaning fluid is collected and returned to a recirculation pump inlet.

2. The poultry chiller of Claim 1, further comprising a second pump having a pump inlet connected to a tank outlet and a pump outlet connected to a reservoir inlet, wherein the non-transitory computer readable medium further has instructions stored thereon to execute the following step: with the second pump, pumping the cleaning fluid from the tank outlet to the reservoir inlet.

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3. The poultry chiller of Claim 1, further comprising a second pump having a pump inlet connected to a tank outlet and a pump outlet connected to a reservoir inlet, the tank outlet is switchable to a drain and the second pump inlet, and wherein the non- transitory computer readable medium further has instructions stored thereon to execute the following steps:

(a) switching the tank outlet to the second pump inlet;

(b) switching the outlet from the recirculation pump to bypass the heat exchanger to discharge the recirculation pump outlet to the distribution nozzles;

(c) pumping cleaning fluid from the reservoir to inside the tank through the distribution nozzles with the recirculation pump;

(d) pumping the cleaning fluid inside the tank from the tank outlet to the reservoir inlet, and

(e) performing steps (c) and (d) for a period of time to clean the tank.

4. The poultry chiller of Claim 3, wherein the non-transitory computer readable medium further has instructions stored thereon to execute the following step: after step (e), perform step (f) switching the tank outlet to the drain to empty the tank of cleaning fluid.

5. The poultry chiller of Claim 4, wherein the non-transitory computer readable medium further has instructions stored thereon to execute the following step:

(g) pumping water from the reservoir outlet to inside the tank through the distribution nozzles with the recirculation pump to rinse the tank of cleaning fluid.

6. The poultry chiller of Claim 3, wherein the non-transitory computer readable medium further has instructions stored thereon to execute the following steps: before step (a), switching the tank outlet to the drain; and pumping water from the reservoir outlet to inside the tank through the distribution nozzles with the recirculation pump to flush the tank.

7. The poultry chiller of Claim 1, wherein the tank opening extends laterally from a first side wall to a second side wall of the tank; and the poultry chiller further comprises:

20 a cover over the opening, wherein the cover has the distribution nozzles being directed to the interior of the tank.

8. The poultry chiller of Claim 7, further comprising a recirculation pump with inlet and outlet, wherein the pump inlet is connected to a tank outlet and the pump outlet is connected to the distribution nozzles.

9. The poultry chiller of Claim 7, further comprising distribution nozzles on the first and second side walls of the tank.

10. The poultry chiller of Claim 9, wherein the distribution nozzles are placed on the tank directed inward and not extending past the inside diameter of the tank.

11. The poultry chiller of Claim 9, wherein the distribution nozzles are placed in a row extending longitudinally along the tank on both the first and second side walls.

12. The poultry chiller of Claim 9, wherein the distribution nozzles of a cylindrical tank are placed at 4 o'clock, 8 o'clock, and 12 o'clock position, wherein the nozzles at the 12 o'clock position are located on the cover.

13. The poultry chiller of Claim 7, wherein the opening is at a top of the tank.

14. The poultry chiller of Claim 1, wherein the tank opening extends laterally from a first side wall to a second side wall of the tank; and further comprises: a recirculation pump with inlet and outlet, wherein the pump inlet is connected to a tank outlet and the pump outlet is connected to an inlet of a heat exchanger, and a heat exchanger outlet is connected to an inlet on the tank, and the pump outlet is further connected to a plurality of distribution nozzles located at the tank.

15. The poultry chiller of Claim 14, further comprising one or more automated valves to configure the pump outlet to bypass the heat exchanger to the plurality of distribution nozzles.

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16. The poultry chiller of Claim 14, further comprising a second pump with inlet and outlet, wherein the second pump inlet is connected to a tank outlet, and the tank outlet is switchable from the second pump inlet to a drain.

17. A retro-fit kit for installing on a poultry chiller tank having a conveyor within the interior, wherein the tank has an opening extending along a length of the tank and laterally extending from a first side wall to a second side wall of the tank, the kit comprising: a cover having a plurality of distribution nozzles, the cover is configured to be installed over the tank opening, wherein the distribution nozzles are directed into the tank.

18. The retro-fit kit of Claim 17, wherein the poultry chiller further comprises a recirculation pump with inlet and outlet, wherein the pump inlet is connected to a tank outlet and the pump outlet is connected to an inlet of a heat exchanger, and a heat exchanger outlet is connected to an inlet on the tank, and the pump outlet is further connected to the plurality of distribution nozzles on the tank or on the cover, and the retro-fit kit further comprises: one or more valves configured to switch the recirculation pump discharge from the heat exchanger to one or more distribution nozzles on the tank or on the cover.

19. A retro-fit kit for installing on a poultry chiller tank having a conveyor within the interior, wherein the tank has an opening extending along a length of the tank and laterally extending from a first side wall to a second side wall of the tank, the kit comprising a programmable logic controller, having a non-transitory computer readable medium having instructions stored thereon to execute the following step: switching a recirculation pump outlet from a heat exchanger to distribution nozzles located on the tank to discharge cleaning fluid in the interior of the tank.

20. The retro-fit kit of Claim 19, wherein the non-transitory computer readable medium further has instructions stored thereon to execute the following steps: switching a tank outlet from a drain to a second pump inlet; starting the recirculation pump to pump cleaning fluid into the tank through the distribution nozzles; and

22 starting the second pump to recirculate cleaning fluid from the tank back to the recirculation pump.

21. The retro-fit kit of Claim 20, wherein the non-transitory computer readable medium further has instructions stored thereon to execute the following steps: after a first time period of operating the recirculation pump and second pump to recirculate cleaning fluid, switching the tank outlet from second pump inlet to the drain outlet to dispose of the cleaning fluid.

22. A method of cleaning a poultry chiller having a tank with a conveyor on the interior, a cleaning fluid reservoir, a recirculation pump having a pump inlet connected to a reservoir outlet and a pump outlet is switchable to a heat exchanger and a plurality of distribution nozzles on the tank, a second pump having a pump inlet connected to a tank outlet and a pump outlet connected to a reservoir inlet, the tank outlet is switchable to a drain and the second pump inlet, the method comprising the following steps:

(a) filling the reservoir with water;

(b) switching the tank outlet to the drain;

(c) switching the outlet from the recirculation pump to bypass the heat exchanger to discharge the recirculation pump outlet to the distribution nozzles;

(d) pumping the water from the reservoir to inside the tank through the distribution nozzles with the recirculation pump to flush the tank;

(e) filling the reservoir with a cleaning fluid;

(f) switching the tank outlet to the second pump inlet;

(g) pumping the cleaning fluid from the reservoir to inside the tank through the distribution nozzles with the recirculation pump;

(h) pumping the cleaning fluid from the tank to the reservoir with the second pump;

(i) performing steps (g) and (h) for a timed period;

(j) switching the tank outlet to the drain to empty the tank of cleaning fluid;

(k) filling the reservoir with water; and

(l) pumping water from the reservoir to inside the tank through the distribution nozzles with the recirculation pump to rinse the tank of the cleaning fluid.

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