Tempstar F97CMN Installation, Start-Up, Operating And Service And Maintenance Instructions page 71

F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions
The blower motor BLWM will remain on until the main burners ignite
then shut OFF and remain OFF for 25 seconds before coming back on at
modulating heat airflow. When the W/W1 input signal disappears, the
furnace control begins a normal inducer post-purge period while
changing the blower airflow. If Y/Y2 input is still energized the furnace
control CPU will transition the blower motor BLWM airflow to cooling
airflow. If Y/Y2 input signal disappears and the Y1 input is still
energized the furnace control CPU will transition the blower motor
BLWM to low-cooling airflow. If both the Y1 and Y/Y2 signals
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
disappear at the same time, the blower motor BLWM will remain on at
minimum-heat airflow for the selected blower-OFF delay period. At the
end of the blower-OFF delay, the blower motor BLWM will shut OFF
unless G is still energized, in which case the blower motor BLWM will
operate at continuous blower airflow.
Component Self Test
Refer to page 54 for instructions.
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