Thermo Products VH-BBP Spirit Series Installation, Operation & Maintenance Manual page 22

tab for A/C speed operation. If a lower speed is desired for A/C, the speed is
charged the same way. A tab marked "Low" is populated with a lower fan speed
for continuous fan operation thru the "G" circuit of your T-stat. Unused blower
speeds are connected to the "unused motor leads" tabs at bottom right of
fanboard.
d. Replace the blower compartment access door on the counterflow/horizontal unit.
e. Restore electrical power to the furnace at the disconnecting switch.
With the furnace operating, measure the air temperature rise across the furnace again.
If the value does not fall in the range of 55 to 85ºF, repeat the above procedure.
Figure 7: Fan Timer Board Blower Motor Wiring
22