when should a powermax pm4b drop into float mode

Mex says 5 to 7% of battery 20 hr capacity rating for max amperage doing an Equalization.
Example: 225 to 240 AH rating... 5% is 11 to 12 amp charger. Maybe 15 amp charger, tops, for doing an EQ on a pair of 225 or 240 AH 6V batteries.