Controlling a motorized ball valve and appliance with a float switch(es)
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This is what I could understand from the essay.
1st diagram:
Two float switches NO contact - if the water is present then the contact is made. First the LO Lev is on, then after accumulating water even the HI Lev turns on. At that time RLY1 is engaged which turns on the valve and the second relay RLY2 which cuts the power off to the fridge. One contact of the RLY bypasses the HI Lev, so even if the level drops below HI Lev, the RLY1 is self-sustained until the level drops below LO Lev.
2nd diagram:
Everything the same, except it has a Reset button NC in place of LO Lev. The whole state is reset only after button press.
NOTE: You need two searate relays to switch 24V and 120V, as they are different potentials. The relay's contact spacing is too little to have a safe isolation in between.
EDIT 2:
2nd try:
The Hi Lev switch engages the relay that is self-sustained while the power is present. If the water level is high the power is cut off to motorized valve and to the fridge. You can reset this state by simply removing the power after the water has been manually drained.



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3rd variant (the one you are asking for, I guess):
Level switches are NC type. When the water level is below LO level, then the valve is powered on and the fridge as well. It stays such until the water level reaches the HI level. At this point fridge and valve are cut-off. They will turn on again only when water falls below LO level . The same rule applies if a power outage occurs.



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