or for the second stage operation of a two stage system these percentages of air flow may be required to be adjusted for first stage operation in a two stage system and any user selected percent air flow would be that percent air flow multiplied by an installer selected first stage percent air flowrate if a continuous fan mode has been selected that is the fan runs constantly at a selected percent of full air flow when there is no call for heating or cooling then typically if the system cycles off the signal imposed at terminals bk go immediately to the continuous fan air flow setting however during the u201c turn on u201d profiles while the system is operated a continuous fan air flow mode signal imposed on terminals bk should be one corresponding to the profile selected but at a motor speed not less than the continuous fan mode speed another preferred mode of operation is if continuous fan mode is not selected and a blower or fan turnoff delay profile is selected and the system compressor shuts off during a pre run delay time the system should go to the blower turnoff delay flowrate which is a certain percent of the turn on or pre run air flow percent for example fifty percent of fifty percent air flow or twenty five percent air flow under the same conditions if the compressor cycles off during the short run delay profile the.