Fryer filter pump protection with multi-speed filtration and top off

A process of filtering oil in a fryer, wherein the fryer comprises:

• a pump;
• a frypot having oil therein;
• an oil distribution manifold;
• a return valve between the oil distribution manifold and the frypot;
• a filter pan;
• a drain valve between the frypot and the filter pan;
• and
• a conduit connecting the pump, the oil distribution manifold, the return valve, the frypot, the drain valve, and the filter pan in fluid communication;
• the method comprising the steps of:
• initiating the filtration process;
• operating the pump to operate at a first speed while controlling the return valve to be in a closed position, so that the manifold is pressurized with air;
• controlling the return valve to open, so that the pressurized air passes from the manifold into the frypot and through the oil in the frypot;
• and
• controlling the pump to operate at a second speed during the prior controlling step, wherein the second speed is greater than or equal to the first speed.

A process of topping off oil in a fryer, wherein the fryer comprises:

• a single pump;
• a frypot having oil therein;
• a probe in the frypot;
• an oil distribution manifold;
• a return valve between the oil distribution manifold and the frypot;
• a filter pan;
• a drain valve between the frypot and the filter pan;
• and
• a conduit connecting the pump, the oil distribution manifold, the return valve, the frypot, the drain valve, and the filter pan in fluid communication;
• the method comprising the steps of:
• initiating a top-off mode;
• operating the pump to operate at a first speed while controlling the return valve to be in a closed position, so that the manifold is pressurized with air;
• controlling the return valve to open, so that the pressurized air passes from the manifold into the frypot and through the oil in the frypot;
• and
• controlling the pump to move oil through the conduit, and through the manifold and into the frypot;
• controlling the pump to operate at a second speed during the controlling the pump step, wherein the second speed is less than the first speed;
• wherein, when a level of oil in the frypot reaches the probe, controlling the pump to stop, and controlling the return valve to close.