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6.2 FAN TIMER CONTROL BOARD (ST9103A 1028)
o
“FAN OFF” Dip Switches adjustment
COMFORT ADJUSTMENTS
o
Outlet air consistently too warm or too cold - change the blower motor speed to give the
specified air temperature rise.
o
Outlet air gets too warm and burner shuts down - increase air by changing the blower
motor speed to give the specified temperature rise.
o
Outlet air is too cold or too warm at the end of the heating cycle after the burner has turned
off - adjust the “FAN OFF” dip switch on electronic fan center. Refer to the next figure.
“FAN OFF” Dip Switch
OFF CYCLE AIR CIRCULATION
LOW SPEED
All KHM models have the low speed switch for optional constant air
circulation during the furnace off cycle.
“FAN ON”
When “FAN ON” is selected on the thermostat, the blower will run constantly
at the blower speed selected on the heating terminal. This is the equivalent of
jumping terminals R and G on the ST9103 board.
Dip Switches
